TypeScript/lib/typingsInstaller.js

"use strict";
var __extends = (this && this.__extends) || (function () {
    var extendStatics = Object.setPrototypeOf ||
        ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
        function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
    return function (d, b) {
        extendStatics(d, b);
        function __() { this.constructor = d; }
        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
    };
})();
var __assign = (this && this.__assign) || Object.assign || function(t) {
    for (var s, i = 1, n = arguments.length; i < n; i++) {
        s = arguments[i];
        for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
            t[p] = s[p];
    }
    return t;
};
"use strict";
/*@internal*/
var ts;
(function (ts) {
    /** Gets a timestamp with (at least) ms resolution */
    ts.timestamp = typeof performance !== "undefined" && performance.now ? function () { return performance.now(); } : Date.now ? Date.now : function () { return +(new Date()); };
})(ts || (ts = {}));
/*@internal*/
/** Performance measurements for the compiler. */
(function (ts) {
    var performance;
    (function (performance) {
        // NOTE: cannot use ts.noop as core.ts loads after this
        var profilerEvent = typeof onProfilerEvent === "function" && onProfilerEvent.profiler === true ? onProfilerEvent : function () { };
        var enabled = false;
        var profilerStart = 0;
        var counts;
        var marks;
        var measures;
        /**
         * Marks a performance event.
         *
         * @param markName The name of the mark.
         */
        function mark(markName) {
            if (enabled) {
                marks.set(markName, ts.timestamp());
                counts.set(markName, (counts.get(markName) || 0) + 1);
                profilerEvent(markName);
            }
        }
        performance.mark = mark;
        /**
         * Adds a performance measurement with the specified name.
         *
         * @param measureName The name of the performance measurement.
         * @param startMarkName The name of the starting mark. If not supplied, the point at which the
         *      profiler was enabled is used.
         * @param endMarkName The name of the ending mark. If not supplied, the current timestamp is
         *      used.
         */
        function measure(measureName, startMarkName, endMarkName) {
            if (enabled) {
                var end = endMarkName && marks.get(endMarkName) || ts.timestamp();
                var start = startMarkName && marks.get(startMarkName) || profilerStart;
                measures.set(measureName, (measures.get(measureName) || 0) + (end - start));
            }
        }
        performance.measure = measure;
        /**
         * Gets the number of times a marker was encountered.
         *
         * @param markName The name of the mark.
         */
        function getCount(markName) {
            return counts && counts.get(markName) || 0;
        }
        performance.getCount = getCount;
        /**
         * Gets the total duration of all measurements with the supplied name.
         *
         * @param measureName The name of the measure whose durations should be accumulated.
         */
        function getDuration(measureName) {
            return measures && measures.get(measureName) || 0;
        }
        performance.getDuration = getDuration;
        /**
         * Iterate over each measure, performing some action
         *
         * @param cb The action to perform for each measure
         */
        function forEachMeasure(cb) {
            measures.forEach(function (measure, key) {
                cb(key, measure);
            });
        }
        performance.forEachMeasure = forEachMeasure;
        /** Enables (and resets) performance measurements for the compiler. */
        function enable() {
            counts = ts.createMap();
            marks = ts.createMap();
            measures = ts.createMap();
            enabled = true;
            profilerStart = ts.timestamp();
        }
        performance.enable = enable;
        /** Disables performance measurements for the compiler. */
        function disable() {
            enabled = false;
        }
        performance.disable = disable;
    })(performance = ts.performance || (ts.performance = {}));
})(ts || (ts = {}));
var ts;
(function (ts) {
    // WARNING: The script `configureNightly.ts` uses a regexp to parse out these values.
    // If changing the text in this section, be sure to test `configureNightly` too.
    ts.versionMajorMinor = "3.0";
    /** The version of the TypeScript compiler release */
    ts.version = ts.versionMajorMinor + ".0-dev";
})(ts || (ts = {}));
/* @internal */
(function (ts) {
    var Comparison;
    (function (Comparison) {
        Comparison[Comparison["LessThan"] = -1] = "LessThan";
        Comparison[Comparison["EqualTo"] = 0] = "EqualTo";
        Comparison[Comparison["GreaterThan"] = 1] = "GreaterThan";
    })(Comparison = ts.Comparison || (ts.Comparison = {}));
    /** Create a MapLike with good performance. */
    function createDictionaryObject() {
        var map = Object.create(/*prototype*/ null); // tslint:disable-line:no-null-keyword
        // Using 'delete' on an object causes V8 to put the object in dictionary mode.
        // This disables creation of hidden classes, which are expensive when an object is
        // constantly changing shape.
        map.__ = undefined;
        delete map.__;
        return map;
    }
    /** Create a new map. If a template object is provided, the map will copy entries from it. */
    function createMap() {
        return new ts.MapCtr();
    }
    ts.createMap = createMap;
    function createMapFromEntries(entries) {
        var map = createMap();
        for (var _i = 0, entries_1 = entries; _i < entries_1.length; _i++) {
            var _a = entries_1[_i], key = _a[0], value = _a[1];
            map.set(key, value);
        }
        return map;
    }
    ts.createMapFromEntries = createMapFromEntries;
    function createMapFromTemplate(template) {
        var map = new ts.MapCtr();
        // Copies keys/values from template. Note that for..in will not throw if
        // template is undefined, and instead will just exit the loop.
        for (var key in template) {
            if (hasOwnProperty.call(template, key)) {
                map.set(key, template[key]);
            }
        }
        return map;
    }
    ts.createMapFromTemplate = createMapFromTemplate;
    // Internet Explorer's Map doesn't support iteration, so don't use it.
    // tslint:disable-next-line no-in-operator variable-name
    ts.MapCtr = typeof Map !== "undefined" && "entries" in Map.prototype ? Map : shimMap();
    // Keep the class inside a function so it doesn't get compiled if it's not used.
    function shimMap() {
        var MapIterator = /** @class */ (function () {
            function MapIterator(data, selector) {
                this.index = 0;
                this.data = data;
                this.selector = selector;
                this.keys = Object.keys(data);
            }
            MapIterator.prototype.next = function () {
                var index = this.index;
                if (index < this.keys.length) {
                    this.index++;
                    return { value: this.selector(this.data, this.keys[index]), done: false };
                }
                return { value: undefined, done: true };
            };
            return MapIterator;
        }());
        return /** @class */ (function () {
            function class_1() {
                this.data = createDictionaryObject();
                this.size = 0;
            }
            class_1.prototype.get = function (key) {
                return this.data[key];
            };
            class_1.prototype.set = function (key, value) {
                if (!this.has(key)) {
                    this.size++;
                }
                this.data[key] = value;
                return this;
            };
            class_1.prototype.has = function (key) {
                // tslint:disable-next-line:no-in-operator
                return key in this.data;
            };
            class_1.prototype.delete = function (key) {
                if (this.has(key)) {
                    this.size--;
                    delete this.data[key];
                    return true;
                }
                return false;
            };
            class_1.prototype.clear = function () {
                this.data = createDictionaryObject();
                this.size = 0;
            };
            class_1.prototype.keys = function () {
                return new MapIterator(this.data, function (_data, key) { return key; });
            };
            class_1.prototype.values = function () {
                return new MapIterator(this.data, function (data, key) { return data[key]; });
            };
            class_1.prototype.entries = function () {
                return new MapIterator(this.data, function (data, key) { return [key, data[key]]; });
            };
            class_1.prototype.forEach = function (action) {
                for (var key in this.data) {
                    action(this.data[key], key);
                }
            };
            return class_1;
        }());
    }
    function length(array) {
        return array ? array.length : 0;
    }
    ts.length = length;
    /**
     * Iterates through 'array' by index and performs the callback on each element of array until the callback
     * returns a truthy value, then returns that value.
     * If no such value is found, the callback is applied to each element of array and undefined is returned.
     */
    function forEach(array, callback) {
        if (array) {
            for (var i = 0; i < array.length; i++) {
                var result = callback(array[i], i);
                if (result) {
                    return result;
                }
            }
        }
        return undefined;
    }
    ts.forEach = forEach;
    /** Like `forEach`, but suitable for use with numbers and strings (which may be falsy). */
    function firstDefined(array, callback) {
        if (array === undefined) {
            return undefined;
        }
        for (var i = 0; i < array.length; i++) {
            var result = callback(array[i], i);
            if (result !== undefined) {
                return result;
            }
        }
        return undefined;
    }
    ts.firstDefined = firstDefined;
    function firstDefinedIterator(iter, callback) {
        while (true) {
            var _a = iter.next(), value = _a.value, done = _a.done;
            if (done) {
                return undefined;
            }
            var result = callback(value);
            if (result !== undefined) {
                return result;
            }
        }
    }
    ts.firstDefinedIterator = firstDefinedIterator;
    function zipWith(arrayA, arrayB, callback) {
        var result = [];
        Debug.assertEqual(arrayA.length, arrayB.length);
        for (var i = 0; i < arrayA.length; i++) {
            result.push(callback(arrayA[i], arrayB[i], i));
        }
        return result;
    }
    ts.zipWith = zipWith;
    function zipToIterator(arrayA, arrayB) {
        Debug.assertEqual(arrayA.length, arrayB.length);
        var i = 0;
        return {
            next: function () {
                if (i === arrayA.length) {
                    return { value: undefined, done: true };
                }
                i++;
                return { value: [arrayA[i - 1], arrayB[i - 1]], done: false };
            }
        };
    }
    ts.zipToIterator = zipToIterator;
    function zipToMap(keys, values) {
        Debug.assert(keys.length === values.length);
        var map = createMap();
        for (var i = 0; i < keys.length; ++i) {
            map.set(keys[i], values[i]);
        }
        return map;
    }
    ts.zipToMap = zipToMap;
    /**
     * Iterates through `array` by index and performs the callback on each element of array until the callback
     * returns a falsey value, then returns false.
     * If no such value is found, the callback is applied to each element of array and `true` is returned.
     */
    function every(array, callback) {
        if (array) {
            for (var i = 0; i < array.length; i++) {
                if (!callback(array[i], i)) {
                    return false;
                }
            }
        }
        return true;
    }
    ts.every = every;
    function find(array, predicate) {
        for (var i = 0; i < array.length; i++) {
            var value = array[i];
            if (predicate(value, i)) {
                return value;
            }
        }
        return undefined;
    }
    ts.find = find;
    function findLast(array, predicate) {
        for (var i = array.length - 1; i >= 0; i--) {
            var value = array[i];
            if (predicate(value, i)) {
                return value;
            }
        }
        return undefined;
    }
    ts.findLast = findLast;
    /** Works like Array.prototype.findIndex, returning `-1` if no element satisfying the predicate is found. */
    function findIndex(array, predicate, startIndex) {
        for (var i = startIndex || 0; i < array.length; i++) {
            if (predicate(array[i], i)) {
                return i;
            }
        }
        return -1;
    }
    ts.findIndex = findIndex;
    function findLastIndex(array, predicate, startIndex) {
        for (var i = startIndex === undefined ? array.length - 1 : startIndex; i >= 0; i--) {
            if (predicate(array[i], i)) {
                return i;
            }
        }
        return -1;
    }
    ts.findLastIndex = findLastIndex;
    /**
     * Returns the first truthy result of `callback`, or else fails.
     * This is like `forEach`, but never returns undefined.
     */
    function findMap(array, callback) {
        for (var i = 0; i < array.length; i++) {
            var result = callback(array[i], i);
            if (result) {
                return result;
            }
        }
        return Debug.fail();
    }
    ts.findMap = findMap;
    function contains(array, value, equalityComparer) {
        if (equalityComparer === void 0) { equalityComparer = equateValues; }
        if (array) {
            for (var _i = 0, array_1 = array; _i < array_1.length; _i++) {
                var v = array_1[_i];
                if (equalityComparer(v, value)) {
                    return true;
                }
            }
        }
        return false;
    }
    ts.contains = contains;
    function arraysEqual(a, b, equalityComparer) {
        if (equalityComparer === void 0) { equalityComparer = equateValues; }
        return a.length === b.length && a.every(function (x, i) { return equalityComparer(x, b[i]); });
    }
    ts.arraysEqual = arraysEqual;
    function indexOfAnyCharCode(text, charCodes, start) {
        for (var i = start || 0; i < text.length; i++) {
            if (contains(charCodes, text.charCodeAt(i))) {
                return i;
            }
        }
        return -1;
    }
    ts.indexOfAnyCharCode = indexOfAnyCharCode;
    function countWhere(array, predicate) {
        var count = 0;
        if (array) {
            for (var i = 0; i < array.length; i++) {
                var v = array[i];
                if (predicate(v, i)) {
                    count++;
                }
            }
        }
        return count;
    }
    ts.countWhere = countWhere;
    function filter(array, f) {
        if (array) {
            var len = array.length;
            var i = 0;
            while (i < len && f(array[i]))
                i++;
            if (i < len) {
                var result = array.slice(0, i);
                i++;
                while (i < len) {
                    var item = array[i];
                    if (f(item)) {
                        result.push(item);
                    }
                    i++;
                }
                return result;
            }
        }
        return array;
    }
    ts.filter = filter;
    function filterMutate(array, f) {
        var outIndex = 0;
        for (var i = 0; i < array.length; i++) {
            if (f(array[i], i, array)) {
                array[outIndex] = array[i];
                outIndex++;
            }
        }
        array.length = outIndex;
    }
    ts.filterMutate = filterMutate;
    function clear(array) {
        array.length = 0;
    }
    ts.clear = clear;
    function map(array, f) {
        var result;
        if (array) {
            result = [];
            for (var i = 0; i < array.length; i++) {
                result.push(f(array[i], i));
            }
        }
        return result;
    }
    ts.map = map;
    function mapIterator(iter, mapFn) {
        return {
            next: function () {
                var iterRes = iter.next();
                return iterRes.done ? iterRes : { value: mapFn(iterRes.value), done: false };
            }
        };
    }
    ts.mapIterator = mapIterator;
    function sameMap(array, f) {
        if (array) {
            for (var i = 0; i < array.length; i++) {
                var item = array[i];
                var mapped = f(item, i);
                if (item !== mapped) {
                    var result = array.slice(0, i);
                    result.push(mapped);
                    for (i++; i < array.length; i++) {
                        result.push(f(array[i], i));
                    }
                    return result;
                }
            }
        }
        return array;
    }
    ts.sameMap = sameMap;
    function flatten(array) {
        var result;
        if (array) {
            result = [];
            for (var _i = 0, array_2 = array; _i < array_2.length; _i++) {
                var v = array_2[_i];
                if (v) {
                    if (isArray(v)) {
                        addRange(result, v);
                    }
                    else {
                        result.push(v);
                    }
                }
            }
        }
        return result;
    }
    ts.flatten = flatten;
    function flatMap(array, mapfn) {
        var result;
        if (array) {
            result = [];
            for (var i = 0; i < array.length; i++) {
                var v = mapfn(array[i], i);
                if (v) {
                    if (isArray(v)) {
                        addRange(result, v);
                    }
                    else {
                        result.push(v);
                    }
                }
            }
        }
        return result;
    }
    ts.flatMap = flatMap;
    function flatMapIterator(iter, mapfn) {
        var first = iter.next();
        if (first.done) {
            return ts.emptyIterator;
        }
        var currentIter = getIterator(first.value);
        return {
            next: function () {
                while (true) {
                    var currentRes = currentIter.next();
                    if (!currentRes.done) {
                        return currentRes;
                    }
                    var iterRes = iter.next();
                    if (iterRes.done) {
                        return iterRes;
                    }
                    currentIter = getIterator(iterRes.value);
                }
            },
        };
        function getIterator(x) {
            var res = mapfn(x);
            return res === undefined ? ts.emptyIterator : isArray(res) ? arrayIterator(res) : res;
        }
    }
    ts.flatMapIterator = flatMapIterator;
    function sameFlatMap(array, mapfn) {
        var result;
        if (array) {
            for (var i = 0; i < array.length; i++) {
                var item = array[i];
                var mapped = mapfn(item, i);
                if (result || item !== mapped || isArray(mapped)) {
                    if (!result) {
                        result = array.slice(0, i);
                    }
                    if (isArray(mapped)) {
                        addRange(result, mapped);
                    }
                    else {
                        result.push(mapped);
                    }
                }
            }
        }
        return result || array;
    }
    ts.sameFlatMap = sameFlatMap;
    function mapAllOrFail(array, mapFn) {
        var result = [];
        for (var i = 0; i < array.length; i++) {
            var mapped = mapFn(array[i], i);
            if (mapped === undefined) {
                return undefined;
            }
            result.push(mapped);
        }
        return result;
    }
    ts.mapAllOrFail = mapAllOrFail;
    function mapDefined(array, mapFn) {
        var result = [];
        if (array) {
            for (var i = 0; i < array.length; i++) {
                var mapped = mapFn(array[i], i);
                if (mapped !== undefined) {
                    result.push(mapped);
                }
            }
        }
        return result;
    }
    ts.mapDefined = mapDefined;
    function mapDefinedIterator(iter, mapFn) {
        return {
            next: function () {
                while (true) {
                    var res = iter.next();
                    if (res.done) {
                        return res;
                    }
                    var value = mapFn(res.value);
                    if (value !== undefined) {
                        return { value: value, done: false };
                    }
                }
            }
        };
    }
    ts.mapDefinedIterator = mapDefinedIterator;
    ts.emptyIterator = { next: function () { return ({ value: undefined, done: true }); } };
    function singleIterator(value) {
        var done = false;
        return {
            next: function () {
                var wasDone = done;
                done = true;
                return wasDone ? { value: undefined, done: true } : { value: value, done: false };
            }
        };
    }
    ts.singleIterator = singleIterator;
    function spanMap(array, keyfn, mapfn) {
        var result;
        if (array) {
            result = [];
            var len = array.length;
            var previousKey = void 0;
            var key = void 0;
            var start = 0;
            var pos = 0;
            while (start < len) {
                while (pos < len) {
                    var value = array[pos];
                    key = keyfn(value, pos);
                    if (pos === 0) {
                        previousKey = key;
                    }
                    else if (key !== previousKey) {
                        break;
                    }
                    pos++;
                }
                if (start < pos) {
                    var v = mapfn(array.slice(start, pos), previousKey, start, pos);
                    if (v) {
                        result.push(v);
                    }
                    start = pos;
                }
                previousKey = key;
                pos++;
            }
        }
        return result;
    }
    ts.spanMap = spanMap;
    function mapEntries(map, f) {
        if (!map) {
            return undefined;
        }
        var result = createMap();
        map.forEach(function (value, key) {
            var _a = f(key, value), newKey = _a[0], newValue = _a[1];
            result.set(newKey, newValue);
        });
        return result;
    }
    ts.mapEntries = mapEntries;
    function some(array, predicate) {
        if (array) {
            if (predicate) {
                for (var _i = 0, array_3 = array; _i < array_3.length; _i++) {
                    var v = array_3[_i];
                    if (predicate(v)) {
                        return true;
                    }
                }
            }
            else {
                return array.length > 0;
            }
        }
        return false;
    }
    ts.some = some;
    /** Calls the callback with (start, afterEnd) index pairs for each range where 'pred' is true. */
    function getRangesWhere(arr, pred, cb) {
        var start;
        for (var i = 0; i < arr.length; i++) {
            if (pred(arr[i])) {
                start = start === undefined ? i : start;
            }
            else {
                if (start !== undefined) {
                    cb(start, i);
                    start = undefined;
                }
            }
        }
        if (start !== undefined)
            cb(start, arr.length);
    }
    ts.getRangesWhere = getRangesWhere;
    function concatenate(array1, array2) {
        if (!some(array2))
            return array1;
        if (!some(array1))
            return array2;
        return array1.concat(array2);
    }
    ts.concatenate = concatenate;
    function deduplicateRelational(array, equalityComparer, comparer) {
        // Perform a stable sort of the array. This ensures the first entry in a list of
        // duplicates remains the first entry in the result.
        var indices = array.map(function (_, i) { return i; });
        stableSortIndices(array, indices, comparer);
        var last = array[indices[0]];
        var deduplicated = [indices[0]];
        for (var i = 1; i < indices.length; i++) {
            var index = indices[i];
            var item = array[index];
            if (!equalityComparer(last, item)) {
                deduplicated.push(index);
                last = item;
            }
        }
        // restore original order
        deduplicated.sort();
        return deduplicated.map(function (i) { return array[i]; });
    }
    function deduplicateEquality(array, equalityComparer) {
        var result = [];
        for (var _i = 0, array_4 = array; _i < array_4.length; _i++) {
            var item = array_4[_i];
            pushIfUnique(result, item, equalityComparer);
        }
        return result;
    }
    function deduplicate(array, equalityComparer, comparer) {
        return !array ? undefined :
            array.length === 0 ? [] :
                array.length === 1 ? array.slice() :
                    comparer ? deduplicateRelational(array, equalityComparer, comparer) :
                        deduplicateEquality(array, equalityComparer);
    }
    ts.deduplicate = deduplicate;
    function deduplicateSorted(array, comparer) {
        if (!array)
            return undefined;
        if (array.length === 0)
            return [];
        var last = array[0];
        var deduplicated = [last];
        for (var i = 1; i < array.length; i++) {
            var next = array[i];
            switch (comparer(next, last)) {
                // equality comparison
                case true:
                // relational comparison
                case 0 /* EqualTo */:
                    continue;
                case -1 /* LessThan */:
                    // If `array` is sorted, `next` should **never** be less than `last`.
                    return Debug.fail("Array is unsorted.");
            }
            deduplicated.push(last = next);
        }
        return deduplicated;
    }
    function insertSorted(array, insert, compare) {
        if (array.length === 0) {
            array.push(insert);
            return;
        }
        var insertIndex = binarySearch(array, insert, identity, compare);
        if (insertIndex < 0) {
            array.splice(~insertIndex, 0, insert);
        }
    }
    ts.insertSorted = insertSorted;
    function sortAndDeduplicate(array, comparer, equalityComparer) {
        return deduplicateSorted(sort(array, comparer), equalityComparer || comparer);
    }
    ts.sortAndDeduplicate = sortAndDeduplicate;
    function arrayIsEqualTo(array1, array2, equalityComparer) {
        if (equalityComparer === void 0) { equalityComparer = equateValues; }
        if (!array1 || !array2) {
            return array1 === array2;
        }
        if (array1.length !== array2.length) {
            return false;
        }
        for (var i = 0; i < array1.length; i++) {
            if (!equalityComparer(array1[i], array2[i])) {
                return false;
            }
        }
        return true;
    }
    ts.arrayIsEqualTo = arrayIsEqualTo;
    function compact(array) {
        var result;
        if (array) {
            for (var i = 0; i < array.length; i++) {
                var v = array[i];
                if (result || !v) {
                    if (!result) {
                        result = array.slice(0, i);
                    }
                    if (v) {
                        result.push(v);
                    }
                }
            }
        }
        return result || array;
    }
    ts.compact = compact;
    /**
     * Gets the relative complement of `arrayA` with respect to `arrayB`, returning the elements that
     * are not present in `arrayA` but are present in `arrayB`. Assumes both arrays are sorted
     * based on the provided comparer.
     */
    function relativeComplement(arrayA, arrayB, comparer) {
        if (!arrayB || !arrayA || arrayB.length === 0 || arrayA.length === 0)
            return arrayB;
        var result = [];
        loopB: for (var offsetA = 0, offsetB = 0; offsetB < arrayB.length; offsetB++) {
            if (offsetB > 0) {
                // Ensure `arrayB` is properly sorted.
                Debug.assertGreaterThanOrEqual(comparer(arrayB[offsetB], arrayB[offsetB - 1]), 0 /* EqualTo */);
            }
            loopA: for (var startA = offsetA; offsetA < arrayA.length; offsetA++) {
                if (offsetA > startA) {
                    // Ensure `arrayA` is properly sorted. We only need to perform this check if
                    // `offsetA` has changed since we entered the loop.
                    Debug.assertGreaterThanOrEqual(comparer(arrayA[offsetA], arrayA[offsetA - 1]), 0 /* EqualTo */);
                }
                switch (comparer(arrayB[offsetB], arrayA[offsetA])) {
                    case -1 /* LessThan */:
                        // If B is less than A, B does not exist in arrayA. Add B to the result and
                        // move to the next element in arrayB without changing the current position
                        // in arrayA.
                        result.push(arrayB[offsetB]);
                        continue loopB;
                    case 0 /* EqualTo */:
                        // If B is equal to A, B exists in arrayA. Move to the next element in
                        // arrayB without adding B to the result or changing the current position
                        // in arrayA.
                        continue loopB;
                    case 1 /* GreaterThan */:
                        // If B is greater than A, we need to keep looking for B in arrayA. Move to
                        // the next element in arrayA and recheck.
                        continue loopA;
                }
            }
        }
        return result;
    }
    ts.relativeComplement = relativeComplement;
    function sum(array, prop) {
        var result = 0;
        for (var _i = 0, array_5 = array; _i < array_5.length; _i++) {
            var v = array_5[_i];
            result += v[prop];
        }
        return result;
    }
    ts.sum = sum;
    function append(to, value) {
        if (value === undefined)
            return to;
        if (to === undefined)
            return [value];
        to.push(value);
        return to;
    }
    ts.append = append;
    /**
     * Gets the actual offset into an array for a relative offset. Negative offsets indicate a
     * position offset from the end of the array.
     */
    function toOffset(array, offset) {
        return offset < 0 ? array.length + offset : offset;
    }
    function addRange(to, from, start, end) {
        if (from === undefined || from.length === 0)
            return to;
        if (to === undefined)
            return from.slice(start, end);
        start = start === undefined ? 0 : toOffset(from, start);
        end = end === undefined ? from.length : toOffset(from, end);
        for (var i = start; i < end && i < from.length; i++) {
            if (from[i] !== undefined) {
                to.push(from[i]);
            }
        }
        return to;
    }
    ts.addRange = addRange;
    /**
     * @return Whether the value was added.
     */
    function pushIfUnique(array, toAdd, equalityComparer) {
        if (contains(array, toAdd, equalityComparer)) {
            return false;
        }
        else {
            array.push(toAdd);
            return true;
        }
    }
    ts.pushIfUnique = pushIfUnique;
    /**
     * Unlike `pushIfUnique`, this can take `undefined` as an input, and returns a new array.
     */
    function appendIfUnique(array, toAdd, equalityComparer) {
        if (array) {
            pushIfUnique(array, toAdd, equalityComparer);
            return array;
        }
        else {
            return [toAdd];
        }
    }
    ts.appendIfUnique = appendIfUnique;
    function stableSortIndices(array, indices, comparer) {
        // sort indices by value then position
        indices.sort(function (x, y) { return comparer(array[x], array[y]) || compareValues(x, y); });
    }
    /**
     * Returns a new sorted array.
     */
    function sort(array, comparer) {
        return array.slice().sort(comparer);
    }
    ts.sort = sort;
    function best(iter, isBetter) {
        var x = iter.next();
        if (x.done) {
            return undefined;
        }
        var best = x.value;
        while (true) {
            var _a = iter.next(), value = _a.value, done = _a.done;
            if (done) {
                return best;
            }
            if (isBetter(value, best)) {
                best = value;
            }
        }
    }
    ts.best = best;
    function arrayIterator(array) {
        var i = 0;
        return { next: function () {
                if (i === array.length) {
                    return { value: undefined, done: true };
                }
                else {
                    i++;
                    return { value: array[i - 1], done: false };
                }
            } };
    }
    ts.arrayIterator = arrayIterator;
    /**
     * Stable sort of an array. Elements equal to each other maintain their relative position in the array.
     */
    function stableSort(array, comparer) {
        var indices = array.map(function (_, i) { return i; });
        stableSortIndices(array, indices, comparer);
        return indices.map(function (i) { return array[i]; });
    }
    ts.stableSort = stableSort;
    function rangeEquals(array1, array2, pos, end) {
        while (pos < end) {
            if (array1[pos] !== array2[pos]) {
                return false;
            }
            pos++;
        }
        return true;
    }
    ts.rangeEquals = rangeEquals;
    /**
     * Returns the element at a specific offset in an array if non-empty, `undefined` otherwise.
     * A negative offset indicates the element should be retrieved from the end of the array.
     */
    function elementAt(array, offset) {
        if (array) {
            offset = toOffset(array, offset);
            if (offset < array.length) {
                return array[offset];
            }
        }
        return undefined;
    }
    ts.elementAt = elementAt;
    /**
     * Returns the first element of an array if non-empty, `undefined` otherwise.
     */
    function firstOrUndefined(array) {
        return array.length === 0 ? undefined : array[0];
    }
    ts.firstOrUndefined = firstOrUndefined;
    function first(array) {
        Debug.assert(array.length !== 0);
        return array[0];
    }
    ts.first = first;
    /**
     * Returns the last element of an array if non-empty, `undefined` otherwise.
     */
    function lastOrUndefined(array) {
        return array.length === 0 ? undefined : array[array.length - 1];
    }
    ts.lastOrUndefined = lastOrUndefined;
    function last(array) {
        Debug.assert(array.length !== 0);
        return array[array.length - 1];
    }
    ts.last = last;
    /**
     * Returns the only element of an array if it contains only one element, `undefined` otherwise.
     */
    function singleOrUndefined(array) {
        return array && array.length === 1
            ? array[0]
            : undefined;
    }
    ts.singleOrUndefined = singleOrUndefined;
    function singleOrMany(array) {
        return array && array.length === 1
            ? array[0]
            : array;
    }
    ts.singleOrMany = singleOrMany;
    function replaceElement(array, index, value) {
        var result = array.slice(0);
        result[index] = value;
        return result;
    }
    ts.replaceElement = replaceElement;
    /**
     * Performs a binary search, finding the index at which `value` occurs in `array`.
     * If no such index is found, returns the 2's-complement of first index at which
     * `array[index]` exceeds `value`.
     * @param array A sorted array whose first element must be no larger than number
     * @param value The value to be searched for in the array.
     * @param keySelector A callback used to select the search key from `value` and each element of
     * `array`.
     * @param keyComparer A callback used to compare two keys in a sorted array.
     * @param offset An offset into `array` at which to start the search.
     */
    function binarySearch(array, value, keySelector, keyComparer, offset) {
        if (!array || array.length === 0) {
            return -1;
        }
        var low = offset || 0;
        var high = array.length - 1;
        var key = keySelector(value);
        while (low <= high) {
            var middle = low + ((high - low) >> 1);
            var midKey = keySelector(array[middle]);
            switch (keyComparer(midKey, key)) {
                case -1 /* LessThan */:
                    low = middle + 1;
                    break;
                case 0 /* EqualTo */:
                    return middle;
                case 1 /* GreaterThan */:
                    high = middle - 1;
                    break;
            }
        }
        return ~low;
    }
    ts.binarySearch = binarySearch;
    function reduceLeft(array, f, initial, start, count) {
        if (array && array.length > 0) {
            var size = array.length;
            if (size > 0) {
                var pos = start === undefined || start < 0 ? 0 : start;
                var end = count === undefined || pos + count > size - 1 ? size - 1 : pos + count;
                var result = void 0;
                if (arguments.length <= 2) {
                    result = array[pos];
                    pos++;
                }
                else {
                    result = initial;
                }
                while (pos <= end) {
                    result = f(result, array[pos], pos);
                    pos++;
                }
                return result;
            }
        }
        return initial;
    }
    ts.reduceLeft = reduceLeft;
    var hasOwnProperty = Object.prototype.hasOwnProperty;
    /**
     * Indicates whether a map-like contains an own property with the specified key.
     *
     * @param map A map-like.
     * @param key A property key.
     */
    function hasProperty(map, key) {
        return hasOwnProperty.call(map, key);
    }
    ts.hasProperty = hasProperty;
    /**
     * Gets the value of an owned property in a map-like.
     *
     * @param map A map-like.
     * @param key A property key.
     */
    function getProperty(map, key) {
        return hasOwnProperty.call(map, key) ? map[key] : undefined;
    }
    ts.getProperty = getProperty;
    /**
     * Gets the owned, enumerable property keys of a map-like.
     */
    function getOwnKeys(map) {
        var keys = [];
        for (var key in map) {
            if (hasOwnProperty.call(map, key)) {
                keys.push(key);
            }
        }
        return keys;
    }
    ts.getOwnKeys = getOwnKeys;
    function getOwnValues(sparseArray) {
        var values = [];
        for (var key in sparseArray) {
            if (hasOwnProperty.call(sparseArray, key)) {
                values.push(sparseArray[key]);
            }
        }
        return values;
    }
    ts.getOwnValues = getOwnValues;
    function arrayFrom(iterator, map) {
        var _a;
        var result = [];
        for (var _b = iterator.next(), value = _b.value, done = _b.done; !done; _a = iterator.next(), value = _a.value, done = _a.done, _a) {
            result.push(map ? map(value) : value);
        }
        return result;
    }
    ts.arrayFrom = arrayFrom;
    function assign(t) {
        var args = [];
        for (var _i = 1; _i < arguments.length; _i++) {
            args[_i - 1] = arguments[_i];
        }
        for (var _a = 0, args_1 = args; _a < args_1.length; _a++) {
            var arg = args_1[_a];
            for (var p in arg) {
                if (hasProperty(arg, p)) {
                    t[p] = arg[p]; // TODO: GH#23368
                }
            }
        }
        return t;
    }
    ts.assign = assign;
    /**
     * Performs a shallow equality comparison of the contents of two map-likes.
     *
     * @param left A map-like whose properties should be compared.
     * @param right A map-like whose properties should be compared.
     */
    function equalOwnProperties(left, right, equalityComparer) {
        if (equalityComparer === void 0) { equalityComparer = equateValues; }
        if (left === right)
            return true;
        if (!left || !right)
            return false;
        for (var key in left) {
            if (hasOwnProperty.call(left, key)) {
                if (!hasOwnProperty.call(right, key) === undefined)
                    return false;
                if (!equalityComparer(left[key], right[key]))
                    return false;
            }
        }
        for (var key in right) {
            if (hasOwnProperty.call(right, key)) {
                if (!hasOwnProperty.call(left, key))
                    return false;
            }
        }
        return true;
    }
    ts.equalOwnProperties = equalOwnProperties;
    function arrayToMap(array, makeKey, makeValue) {
        if (makeValue === void 0) { makeValue = identity; }
        var result = createMap();
        for (var _i = 0, array_6 = array; _i < array_6.length; _i++) {
            var value = array_6[_i];
            var key = makeKey(value);
            if (key !== undefined)
                result.set(key, makeValue(value));
        }
        return result;
    }
    ts.arrayToMap = arrayToMap;
    function arrayToNumericMap(array, makeKey, makeValue) {
        if (makeValue === void 0) { makeValue = identity; }
        var result = [];
        for (var _i = 0, array_7 = array; _i < array_7.length; _i++) {
            var value = array_7[_i];
            result[makeKey(value)] = makeValue(value);
        }
        return result;
    }
    ts.arrayToNumericMap = arrayToNumericMap;
    function arrayToMultiMap(values, makeKey, makeValue) {
        if (makeValue === void 0) { makeValue = identity; }
        var result = createMultiMap();
        for (var _i = 0, values_1 = values; _i < values_1.length; _i++) {
            var value = values_1[_i];
            result.add(makeKey(value), makeValue(value));
        }
        return result;
    }
    ts.arrayToMultiMap = arrayToMultiMap;
    function group(values, getGroupId) {
        return arrayFrom(arrayToMultiMap(values, getGroupId).values());
    }
    ts.group = group;
    function clone(object) {
        var result = {};
        for (var id in object) {
            if (hasOwnProperty.call(object, id)) {
                result[id] = object[id];
            }
        }
        return result;
    }
    ts.clone = clone;
    function extend(first, second) {
        var result = {};
        for (var id in second) {
            if (hasOwnProperty.call(second, id)) {
                result[id] = second[id];
            }
        }
        for (var id in first) {
            if (hasOwnProperty.call(first, id)) {
                result[id] = first[id];
            }
        }
        return result;
    }
    ts.extend = extend;
    function createMultiMap() {
        var map = createMap();
        map.add = multiMapAdd;
        map.remove = multiMapRemove;
        return map;
    }
    ts.createMultiMap = createMultiMap;
    function multiMapAdd(key, value) {
        var values = this.get(key);
        if (values) {
            values.push(value);
        }
        else {
            this.set(key, values = [value]);
        }
        return values;
    }
    function multiMapRemove(key, value) {
        var values = this.get(key);
        if (values) {
            unorderedRemoveItem(values, value);
            if (!values.length) {
                this.delete(key);
            }
        }
    }
    /**
     * Tests whether a value is an array.
     */
    function isArray(value) {
        return Array.isArray ? Array.isArray(value) : value instanceof Array;
    }
    ts.isArray = isArray;
    function toArray(value) {
        return isArray(value) ? value : [value];
    }
    ts.toArray = toArray;
    /**
     * Tests whether a value is string
     */
    function isString(text) {
        return typeof text === "string";
    }
    ts.isString = isString;
    function tryCast(value, test) {
        return value !== undefined && test(value) ? value : undefined;
    }
    ts.tryCast = tryCast;
    function cast(value, test) {
        if (value !== undefined && test(value))
            return value;
        return Debug.fail("Invalid cast. The supplied value " + value + " did not pass the test '" + Debug.getFunctionName(test) + "'.");
    }
    ts.cast = cast;
    /** Does nothing. */
    function noop(_) { } // tslint:disable-line no-empty
    ts.noop = noop;
    /** Do nothing and return false */
    function returnFalse() { return false; }
    ts.returnFalse = returnFalse;
    /** Do nothing and return true */
    function returnTrue() { return true; }
    ts.returnTrue = returnTrue;
    /** Returns its argument. */
    function identity(x) { return x; }
    ts.identity = identity;
    /** Returns lower case string */
    function toLowerCase(x) { return x.toLowerCase(); }
    ts.toLowerCase = toLowerCase;
    /** Throws an error because a function is not implemented. */
    function notImplemented() {
        throw new Error("Not implemented");
    }
    ts.notImplemented = notImplemented;
    function memoize(callback) {
        var value;
        return function () {
            if (callback) {
                value = callback();
                callback = undefined;
            }
            return value;
        };
    }
    ts.memoize = memoize;
    function chain(a, b, c, d, e) {
        if (e) {
            var args_2 = [];
            for (var i = 0; i < arguments.length; i++) {
                args_2[i] = arguments[i];
            }
            return function (t) { return compose.apply(void 0, map(args_2, function (f) { return f(t); })); };
        }
        else if (d) {
            return function (t) { return compose(a(t), b(t), c(t), d(t)); };
        }
        else if (c) {
            return function (t) { return compose(a(t), b(t), c(t)); };
        }
        else if (b) {
            return function (t) { return compose(a(t), b(t)); };
        }
        else if (a) {
            return function (t) { return compose(a(t)); };
        }
        else {
            return function (_) { return function (u) { return u; }; };
        }
    }
    ts.chain = chain;
    function compose(a, b, c, d, e) {
        if (e) {
            var args_3 = [];
            for (var i = 0; i < arguments.length; i++) {
                args_3[i] = arguments[i];
            }
            return function (t) { return reduceLeft(args_3, function (u, f) { return f(u); }, t); };
        }
        else if (d) {
            return function (t) { return d(c(b(a(t)))); };
        }
        else if (c) {
            return function (t) { return c(b(a(t))); };
        }
        else if (b) {
            return function (t) { return b(a(t)); };
        }
        else if (a) {
            return function (t) { return a(t); };
        }
        else {
            return function (t) { return t; };
        }
    }
    ts.compose = compose;
    var AssertionLevel;
    (function (AssertionLevel) {
        AssertionLevel[AssertionLevel["None"] = 0] = "None";
        AssertionLevel[AssertionLevel["Normal"] = 1] = "Normal";
        AssertionLevel[AssertionLevel["Aggressive"] = 2] = "Aggressive";
        AssertionLevel[AssertionLevel["VeryAggressive"] = 3] = "VeryAggressive";
    })(AssertionLevel = ts.AssertionLevel || (ts.AssertionLevel = {}));
    var Debug;
    (function (Debug) {
        Debug.currentAssertionLevel = 0 /* None */;
        Debug.isDebugging = false;
        function shouldAssert(level) {
            return Debug.currentAssertionLevel >= level;
        }
        Debug.shouldAssert = shouldAssert;
        function assert(expression, message, verboseDebugInfo, stackCrawlMark) {
            if (!expression) {
                if (verboseDebugInfo) {
                    message += "\r\nVerbose Debug Information: " + (typeof verboseDebugInfo === "string" ? verboseDebugInfo : verboseDebugInfo());
                }
                fail(message ? "False expression: " + message : "False expression.", stackCrawlMark || assert);
            }
        }
        Debug.assert = assert;
        function assertEqual(a, b, msg, msg2) {
            if (a !== b) {
                var message = msg ? msg2 ? msg + " " + msg2 : msg : "";
                fail("Expected " + a + " === " + b + ". " + message);
            }
        }
        Debug.assertEqual = assertEqual;
        function assertLessThan(a, b, msg) {
            if (a >= b) {
                fail("Expected " + a + " < " + b + ". " + (msg || ""));
            }
        }
        Debug.assertLessThan = assertLessThan;
        function assertLessThanOrEqual(a, b) {
            if (a > b) {
                fail("Expected " + a + " <= " + b);
            }
        }
        Debug.assertLessThanOrEqual = assertLessThanOrEqual;
        function assertGreaterThanOrEqual(a, b) {
            if (a < b) {
                fail("Expected " + a + " >= " + b);
            }
        }
        Debug.assertGreaterThanOrEqual = assertGreaterThanOrEqual;
        function fail(message, stackCrawlMark) {
            debugger;
            var e = new Error(message ? "Debug Failure. " + message : "Debug Failure.");
            if (Error.captureStackTrace) {
                Error.captureStackTrace(e, stackCrawlMark || fail);
            }
            throw e;
        }
        Debug.fail = fail;
        function assertDefined(value, message) {
            if (value === undefined || value === null)
                return fail(message);
            return value;
        }
        Debug.assertDefined = assertDefined;
        function assertEachDefined(value, message) {
            for (var _i = 0, value_1 = value; _i < value_1.length; _i++) {
                var v = value_1[_i];
                assertDefined(v, message);
            }
            return value;
        }
        Debug.assertEachDefined = assertEachDefined;
        function assertNever(member, message, stackCrawlMark) {
            return fail(message || "Illegal value: " + member, stackCrawlMark || assertNever);
        }
        Debug.assertNever = assertNever;
        function getFunctionName(func) {
            if (typeof func !== "function") {
                return "";
            }
            else if (func.hasOwnProperty("name")) {
                return func.name;
            }
            else {
                var text = Function.prototype.toString.call(func);
                var match = /^function\s+([\w\$]+)\s*\(/.exec(text);
                return match ? match[1] : "";
            }
        }
        Debug.getFunctionName = getFunctionName;
    })(Debug = ts.Debug || (ts.Debug = {}));
    function equateValues(a, b) {
        return a === b;
    }
    ts.equateValues = equateValues;
    /**
     * Compare the equality of two strings using a case-sensitive ordinal comparison.
     *
     * Case-sensitive comparisons compare both strings one code-point at a time using the integer
     * value of each code-point after applying `toUpperCase` to each string. We always map both
     * strings to their upper-case form as some unicode characters do not properly round-trip to
     * lowercase (such as `ẞ` (German sharp capital s)).
     */
    function equateStringsCaseInsensitive(a, b) {
        return a === b
            || a !== undefined
                && b !== undefined
                && a.toUpperCase() === b.toUpperCase();
    }
    ts.equateStringsCaseInsensitive = equateStringsCaseInsensitive;
    /**
     * Compare the equality of two strings using a case-sensitive ordinal comparison.
     *
     * Case-sensitive comparisons compare both strings one code-point at a time using the
     * integer value of each code-point.
     */
    function equateStringsCaseSensitive(a, b) {
        return equateValues(a, b);
    }
    ts.equateStringsCaseSensitive = equateStringsCaseSensitive;
    function compareComparableValues(a, b) {
        return a === b ? 0 /* EqualTo */ :
            a === undefined ? -1 /* LessThan */ :
                b === undefined ? 1 /* GreaterThan */ :
                    a < b ? -1 /* LessThan */ :
                        1 /* GreaterThan */;
    }
    /**
     * Compare two numeric values for their order relative to each other.
     * To compare strings, use any of the `compareStrings` functions.
     */
    function compareValues(a, b) {
        return compareComparableValues(a, b);
    }
    ts.compareValues = compareValues;
    function min(a, b, compare) {
        return compare(a, b) === -1 /* LessThan */ ? a : b;
    }
    ts.min = min;
    /**
     * Compare two strings using a case-insensitive ordinal comparison.
     *
     * Ordinal comparisons are based on the difference between the unicode code points of both
     * strings. Characters with multiple unicode representations are considered unequal. Ordinal
     * comparisons provide predictable ordering, but place "a" after "B".
     *
     * Case-insensitive comparisons compare both strings one code-point at a time using the integer
     * value of each code-point after applying `toUpperCase` to each string. We always map both
     * strings to their upper-case form as some unicode characters do not properly round-trip to
     * lowercase (such as `ẞ` (German sharp capital s)).
     */
    function compareStringsCaseInsensitive(a, b) {
        if (a === b)
            return 0 /* EqualTo */;
        if (a === undefined)
            return -1 /* LessThan */;
        if (b === undefined)
            return 1 /* GreaterThan */;
        a = a.toUpperCase();
        b = b.toUpperCase();
        return a < b ? -1 /* LessThan */ : a > b ? 1 /* GreaterThan */ : 0 /* EqualTo */;
    }
    ts.compareStringsCaseInsensitive = compareStringsCaseInsensitive;
    /**
     * Compare two strings using a case-sensitive ordinal comparison.
     *
     * Ordinal comparisons are based on the difference between the unicode code points of both
     * strings. Characters with multiple unicode representations are considered unequal. Ordinal
     * comparisons provide predictable ordering, but place "a" after "B".
     *
     * Case-sensitive comparisons compare both strings one code-point at a time using the integer
     * value of each code-point.
     */
    function compareStringsCaseSensitive(a, b) {
        return compareComparableValues(a, b);
    }
    ts.compareStringsCaseSensitive = compareStringsCaseSensitive;
    function getStringComparer(ignoreCase) {
        return ignoreCase ? compareStringsCaseInsensitive : compareStringsCaseSensitive;
    }
    ts.getStringComparer = getStringComparer;
    /**
     * Creates a string comparer for use with string collation in the UI.
     */
    var createUIStringComparer = (function () {
        var defaultComparer;
        var enUSComparer;
        var stringComparerFactory = getStringComparerFactory();
        return createStringComparer;
        function compareWithCallback(a, b, comparer) {
            if (a === b)
                return 0 /* EqualTo */;
            if (a === undefined)
                return -1 /* LessThan */;
            if (b === undefined)
                return 1 /* GreaterThan */;
            var value = comparer(a, b);
            return value < 0 ? -1 /* LessThan */ : value > 0 ? 1 /* GreaterThan */ : 0 /* EqualTo */;
        }
        function createIntlCollatorStringComparer(locale) {
            // Intl.Collator.prototype.compare is bound to the collator. See NOTE in
            // http://www.ecma-international.org/ecma-402/2.0/#sec-Intl.Collator.prototype.compare
            var comparer = new Intl.Collator(locale, { usage: "sort", sensitivity: "variant" }).compare;
            return function (a, b) { return compareWithCallback(a, b, comparer); };
        }
        function createLocaleCompareStringComparer(locale) {
            // if the locale is not the default locale (`undefined`), use the fallback comparer.
            if (locale !== undefined)
                return createFallbackStringComparer();
            return function (a, b) { return compareWithCallback(a, b, compareStrings); };
            function compareStrings(a, b) {
                return a.localeCompare(b);
            }
        }
        function createFallbackStringComparer() {
            // An ordinal comparison puts "A" after "b", but for the UI we want "A" before "b".
            // We first sort case insensitively.  So "Aaa" will come before "baa".
            // Then we sort case sensitively, so "aaa" will come before "Aaa".
            //
            // For case insensitive comparisons we always map both strings to their
            // upper-case form as some unicode characters do not properly round-trip to
            // lowercase (such as `ẞ` (German sharp capital s)).
            return function (a, b) { return compareWithCallback(a, b, compareDictionaryOrder); };
            function compareDictionaryOrder(a, b) {
                return compareStrings(a.toUpperCase(), b.toUpperCase()) || compareStrings(a, b);
            }
            function compareStrings(a, b) {
                return a < b ? -1 /* LessThan */ : a > b ? 1 /* GreaterThan */ : 0 /* EqualTo */;
            }
        }
        function getStringComparerFactory() {
            // If the host supports Intl, we use it for comparisons using the default locale.
            if (typeof Intl === "object" && typeof Intl.Collator === "function") {
                return createIntlCollatorStringComparer;
            }
            // If the host does not support Intl, we fall back to localeCompare.
            // localeCompare in Node v0.10 is just an ordinal comparison, so don't use it.
            if (typeof String.prototype.localeCompare === "function" &&
                typeof String.prototype.toLocaleUpperCase === "function" &&
                "a".localeCompare("B") < 0) {
                return createLocaleCompareStringComparer;
            }
            // Otherwise, fall back to ordinal comparison:
            return createFallbackStringComparer;
        }
        function createStringComparer(locale) {
            // Hold onto common string comparers. This avoids constantly reallocating comparers during
            // tests.
            if (locale === undefined) {
                return defaultComparer || (defaultComparer = stringComparerFactory(locale));
            }
            else if (locale === "en-US") {
                return enUSComparer || (enUSComparer = stringComparerFactory(locale));
            }
            else {
                return stringComparerFactory(locale);
            }
        }
    })();
    var uiComparerCaseSensitive;
    var uiLocale;
    function getUILocale() {
        return uiLocale;
    }
    ts.getUILocale = getUILocale;
    function setUILocale(value) {
        if (uiLocale !== value) {
            uiLocale = value;
            uiComparerCaseSensitive = undefined;
        }
    }
    ts.setUILocale = setUILocale;
    /**
     * Compare two strings in a using the case-sensitive sort behavior of the UI locale.
     *
     * Ordering is not predictable between different host locales, but is best for displaying
     * ordered data for UI presentation. Characters with multiple unicode representations may
     * be considered equal.
     *
     * Case-sensitive comparisons compare strings that differ in base characters, or
     * accents/diacritic marks, or case as unequal.
     */
    function compareStringsCaseSensitiveUI(a, b) {
        var comparer = uiComparerCaseSensitive || (uiComparerCaseSensitive = createUIStringComparer(uiLocale));
        return comparer(a, b);
    }
    ts.compareStringsCaseSensitiveUI = compareStringsCaseSensitiveUI;
    function compareProperties(a, b, key, comparer) {
        return a === b ? 0 /* EqualTo */ :
            a === undefined ? -1 /* LessThan */ :
                b === undefined ? 1 /* GreaterThan */ :
                    comparer(a[key], b[key]);
    }
    ts.compareProperties = compareProperties;
    /** True is greater than false. */
    function compareBooleans(a, b) {
        return compareValues(a ? 1 : 0, b ? 1 : 0);
    }
    ts.compareBooleans = compareBooleans;
    /**
     * Given a name and a list of names that are *not* equal to the name, return a spelling suggestion if there is one that is close enough.
     * Names less than length 3 only check for case-insensitive equality, not Levenshtein distance.
     *
     * If there is a candidate that's the same except for case, return that.
     * If there is a candidate that's within one edit of the name, return that.
     * Otherwise, return the candidate with the smallest Levenshtein distance,
     *    except for candidates:
     *      * With no name
     *      * Whose length differs from the target name by more than 0.34 of the length of the name.
     *      * Whose levenshtein distance is more than 0.4 of the length of the name
     *        (0.4 allows 1 substitution/transposition for every 5 characters,
     *         and 1 insertion/deletion at 3 characters)
     */
    function getSpellingSuggestion(name, candidates, getName) {
        var maximumLengthDifference = Math.min(2, Math.floor(name.length * 0.34));
        var bestDistance = Math.floor(name.length * 0.4) + 1; // If the best result isn't better than this, don't bother.
        var bestCandidate;
        var justCheckExactMatches = false;
        var nameLowerCase = name.toLowerCase();
        for (var _i = 0, candidates_1 = candidates; _i < candidates_1.length; _i++) {
            var candidate = candidates_1[_i];
            var candidateName = getName(candidate);
            if (candidateName !== undefined && Math.abs(candidateName.length - nameLowerCase.length) <= maximumLengthDifference) {
                var candidateNameLowerCase = candidateName.toLowerCase();
                if (candidateNameLowerCase === nameLowerCase) {
                    return candidate;
                }
                if (justCheckExactMatches) {
                    continue;
                }
                if (candidateName.length < 3) {
                    // Don't bother, user would have noticed a 2-character name having an extra character
                    continue;
                }
                // Only care about a result better than the best so far.
                var distance = levenshteinWithMax(nameLowerCase, candidateNameLowerCase, bestDistance - 1);
                if (distance === undefined) {
                    continue;
                }
                if (distance < 3) {
                    justCheckExactMatches = true;
                    bestCandidate = candidate;
                }
                else {
                    Debug.assert(distance < bestDistance); // Else `levenshteinWithMax` should return undefined
                    bestDistance = distance;
                    bestCandidate = candidate;
                }
            }
        }
        return bestCandidate;
    }
    ts.getSpellingSuggestion = getSpellingSuggestion;
    function levenshteinWithMax(s1, s2, max) {
        var previous = new Array(s2.length + 1);
        var current = new Array(s2.length + 1);
        /** Represents any value > max. We don't care about the particular value. */
        var big = max + 1;
        for (var i = 0; i <= s2.length; i++) {
            previous[i] = i;
        }
        for (var i = 1; i <= s1.length; i++) {
            var c1 = s1.charCodeAt(i - 1);
            var minJ = i > max ? i - max : 1;
            var maxJ = s2.length > max + i ? max + i : s2.length;
            current[0] = i;
            /** Smallest value of the matrix in the ith column. */
            var colMin = i;
            for (var j = 1; j < minJ; j++) {
                current[j] = big;
            }
            for (var j = minJ; j <= maxJ; j++) {
                var dist = c1 === s2.charCodeAt(j - 1)
                    ? previous[j - 1]
                    : Math.min(/*delete*/ previous[j] + 1, /*insert*/ current[j - 1] + 1, /*substitute*/ previous[j - 1] + 2);
                current[j] = dist;
                colMin = Math.min(colMin, dist);
            }
            for (var j = maxJ + 1; j <= s2.length; j++) {
                current[j] = big;
            }
            if (colMin > max) {
                // Give up -- everything in this column is > max and it can't get better in future columns.
                return undefined;
            }
            var temp = previous;
            previous = current;
            current = temp;
        }
        var res = previous[s2.length];
        return res > max ? undefined : res;
    }
    function endsWith(str, suffix) {
        var expectedPos = str.length - suffix.length;
        return expectedPos >= 0 && str.indexOf(suffix, expectedPos) === expectedPos;
    }
    ts.endsWith = endsWith;
    function removeSuffix(str, suffix) {
        return endsWith(str, suffix) ? str.slice(0, str.length - suffix.length) : str;
    }
    ts.removeSuffix = removeSuffix;
    function tryRemoveSuffix(str, suffix) {
        return endsWith(str, suffix) ? str.slice(0, str.length - suffix.length) : undefined;
    }
    ts.tryRemoveSuffix = tryRemoveSuffix;
    function stringContains(str, substring) {
        return str.indexOf(substring) !== -1;
    }
    ts.stringContains = stringContains;
    function fileExtensionIs(path, extension) {
        return path.length > extension.length && endsWith(path, extension);
    }
    ts.fileExtensionIs = fileExtensionIs;
    function fileExtensionIsOneOf(path, extensions) {
        for (var _i = 0, extensions_1 = extensions; _i < extensions_1.length; _i++) {
            var extension = extensions_1[_i];
            if (fileExtensionIs(path, extension)) {
                return true;
            }
        }
        return false;
    }
    ts.fileExtensionIsOneOf = fileExtensionIsOneOf;
    /**
     * Takes a string like "jquery-min.4.2.3" and returns "jquery"
     */
    function removeMinAndVersionNumbers(fileName) {
        // Match a "." or "-" followed by a version number or 'min' at the end of the name
        var trailingMinOrVersion = /[.-]((min)|(\d+(\.\d+)*))$/;
        // The "min" or version may both be present, in either order, so try applying the above twice.
        return fileName.replace(trailingMinOrVersion, "").replace(trailingMinOrVersion, "");
    }
    ts.removeMinAndVersionNumbers = removeMinAndVersionNumbers;
    /** Remove an item from an array, moving everything to its right one space left. */
    function orderedRemoveItem(array, item) {
        for (var i = 0; i < array.length; i++) {
            if (array[i] === item) {
                orderedRemoveItemAt(array, i);
                return true;
            }
        }
        return false;
    }
    ts.orderedRemoveItem = orderedRemoveItem;
    /** Remove an item by index from an array, moving everything to its right one space left. */
    function orderedRemoveItemAt(array, index) {
        // This seems to be faster than either `array.splice(i, 1)` or `array.copyWithin(i, i+ 1)`.
        for (var i = index; i < array.length - 1; i++) {
            array[i] = array[i + 1];
        }
        array.pop();
    }
    ts.orderedRemoveItemAt = orderedRemoveItemAt;
    function unorderedRemoveItemAt(array, index) {
        // Fill in the "hole" left at `index`.
        array[index] = array[array.length - 1];
        array.pop();
    }
    ts.unorderedRemoveItemAt = unorderedRemoveItemAt;
    /** Remove the *first* occurrence of `item` from the array. */
    function unorderedRemoveItem(array, item) {
        return unorderedRemoveFirstItemWhere(array, function (element) { return element === item; });
    }
    ts.unorderedRemoveItem = unorderedRemoveItem;
    /** Remove the *first* element satisfying `predicate`. */
    function unorderedRemoveFirstItemWhere(array, predicate) {
        for (var i = 0; i < array.length; i++) {
            if (predicate(array[i])) {
                unorderedRemoveItemAt(array, i);
                return true;
            }
        }
        return false;
    }
    function createGetCanonicalFileName(useCaseSensitiveFileNames) {
        return useCaseSensitiveFileNames ? identity : toLowerCase;
    }
    ts.createGetCanonicalFileName = createGetCanonicalFileName;
    function patternText(_a) {
        var prefix = _a.prefix, suffix = _a.suffix;
        return prefix + "*" + suffix;
    }
    ts.patternText = patternText;
    /**
     * Given that candidate matches pattern, returns the text matching the '*'.
     * E.g.: matchedText(tryParsePattern("foo*baz"), "foobarbaz") === "bar"
     */
    function matchedText(pattern, candidate) {
        Debug.assert(isPatternMatch(pattern, candidate));
        return candidate.substring(pattern.prefix.length, candidate.length - pattern.suffix.length);
    }
    ts.matchedText = matchedText;
    /** Return the object corresponding to the best pattern to match `candidate`. */
    function findBestPatternMatch(values, getPattern, candidate) {
        var matchedValue;
        // use length of prefix as betterness criteria
        var longestMatchPrefixLength = -1;
        for (var _i = 0, values_2 = values; _i < values_2.length; _i++) {
            var v = values_2[_i];
            var pattern = getPattern(v);
            if (isPatternMatch(pattern, candidate) && pattern.prefix.length > longestMatchPrefixLength) {
                longestMatchPrefixLength = pattern.prefix.length;
                matchedValue = v;
            }
        }
        return matchedValue;
    }
    ts.findBestPatternMatch = findBestPatternMatch;
    function startsWith(str, prefix) {
        return str.lastIndexOf(prefix, 0) === 0;
    }
    ts.startsWith = startsWith;
    function removePrefix(str, prefix) {
        return startsWith(str, prefix) ? str.substr(prefix.length) : str;
    }
    ts.removePrefix = removePrefix;
    function tryRemovePrefix(str, prefix) {
        return startsWith(str, prefix) ? str.substring(prefix.length) : undefined;
    }
    ts.tryRemovePrefix = tryRemovePrefix;
    function isPatternMatch(_a, candidate) {
        var prefix = _a.prefix, suffix = _a.suffix;
        return candidate.length >= prefix.length + suffix.length &&
            startsWith(candidate, prefix) &&
            endsWith(candidate, suffix);
    }
    function and(f, g) {
        return function (arg) { return f(arg) && g(arg); };
    }
    ts.and = and;
    function or(f, g) {
        return function (arg) { return f(arg) || g(arg); };
    }
    ts.or = or;
    function assertTypeIsNever(_) { } // tslint:disable-line no-empty
    ts.assertTypeIsNever = assertTypeIsNever;
    function singleElementArray(t) {
        return t === undefined ? undefined : [t];
    }
    ts.singleElementArray = singleElementArray;
    function enumerateInsertsAndDeletes(newItems, oldItems, comparer, inserted, deleted, unchanged) {
        unchanged = unchanged || noop;
        var newIndex = 0;
        var oldIndex = 0;
        var newLen = newItems.length;
        var oldLen = oldItems.length;
        while (newIndex < newLen && oldIndex < oldLen) {
            var newItem = newItems[newIndex];
            var oldItem = oldItems[oldIndex];
            var compareResult = comparer(newItem, oldItem);
            if (compareResult === -1 /* LessThan */) {
                inserted(newItem);
                newIndex++;
            }
            else if (compareResult === 1 /* GreaterThan */) {
                deleted(oldItem);
                oldIndex++;
            }
            else {
                unchanged(oldItem, newItem);
                newIndex++;
                oldIndex++;
            }
        }
        while (newIndex < newLen) {
            inserted(newItems[newIndex++]);
        }
        while (oldIndex < oldLen) {
            deleted(oldItems[oldIndex++]);
        }
    }
    ts.enumerateInsertsAndDeletes = enumerateInsertsAndDeletes;
})(ts || (ts = {}));
//# sourceMappingURL=core.js.map
"use strict";
var __assign = (this && this.__assign) || Object.assign || function(t) {
    for (var s, i = 1, n = arguments.length; i < n; i++) {
        s = arguments[i];
        for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
            t[p] = s[p];
    }
    return t;
};
var ts;
(function (ts) {
    // token > SyntaxKind.Identifier => token is a keyword
    // Also, If you add a new SyntaxKind be sure to keep the `Markers` section at the bottom in sync
    var SyntaxKind;
    (function (SyntaxKind) {
        SyntaxKind[SyntaxKind["Unknown"] = 0] = "Unknown";
        SyntaxKind[SyntaxKind["EndOfFileToken"] = 1] = "EndOfFileToken";
        SyntaxKind[SyntaxKind["SingleLineCommentTrivia"] = 2] = "SingleLineCommentTrivia";
        SyntaxKind[SyntaxKind["MultiLineCommentTrivia"] = 3] = "MultiLineCommentTrivia";
        SyntaxKind[SyntaxKind["NewLineTrivia"] = 4] = "NewLineTrivia";
        SyntaxKind[SyntaxKind["WhitespaceTrivia"] = 5] = "WhitespaceTrivia";
        // We detect and preserve #! on the first line
        SyntaxKind[SyntaxKind["ShebangTrivia"] = 6] = "ShebangTrivia";
        // We detect and provide better error recovery when we encounter a git merge marker.  This
        // allows us to edit files with git-conflict markers in them in a much more pleasant manner.
        SyntaxKind[SyntaxKind["ConflictMarkerTrivia"] = 7] = "ConflictMarkerTrivia";
        // Literals
        SyntaxKind[SyntaxKind["NumericLiteral"] = 8] = "NumericLiteral";
        SyntaxKind[SyntaxKind["StringLiteral"] = 9] = "StringLiteral";
        SyntaxKind[SyntaxKind["JsxText"] = 10] = "JsxText";
        SyntaxKind[SyntaxKind["JsxTextAllWhiteSpaces"] = 11] = "JsxTextAllWhiteSpaces";
        SyntaxKind[SyntaxKind["RegularExpressionLiteral"] = 12] = "RegularExpressionLiteral";
        SyntaxKind[SyntaxKind["NoSubstitutionTemplateLiteral"] = 13] = "NoSubstitutionTemplateLiteral";
        // Pseudo-literals
        SyntaxKind[SyntaxKind["TemplateHead"] = 14] = "TemplateHead";
        SyntaxKind[SyntaxKind["TemplateMiddle"] = 15] = "TemplateMiddle";
        SyntaxKind[SyntaxKind["TemplateTail"] = 16] = "TemplateTail";
        // Punctuation
        SyntaxKind[SyntaxKind["OpenBraceToken"] = 17] = "OpenBraceToken";
        SyntaxKind[SyntaxKind["CloseBraceToken"] = 18] = "CloseBraceToken";
        SyntaxKind[SyntaxKind["OpenParenToken"] = 19] = "OpenParenToken";
        SyntaxKind[SyntaxKind["CloseParenToken"] = 20] = "CloseParenToken";
        SyntaxKind[SyntaxKind["OpenBracketToken"] = 21] = "OpenBracketToken";
        SyntaxKind[SyntaxKind["CloseBracketToken"] = 22] = "CloseBracketToken";
        SyntaxKind[SyntaxKind["DotToken"] = 23] = "DotToken";
        SyntaxKind[SyntaxKind["DotDotDotToken"] = 24] = "DotDotDotToken";
        SyntaxKind[SyntaxKind["SemicolonToken"] = 25] = "SemicolonToken";
        SyntaxKind[SyntaxKind["CommaToken"] = 26] = "CommaToken";
        SyntaxKind[SyntaxKind["LessThanToken"] = 27] = "LessThanToken";
        SyntaxKind[SyntaxKind["LessThanSlashToken"] = 28] = "LessThanSlashToken";
        SyntaxKind[SyntaxKind["GreaterThanToken"] = 29] = "GreaterThanToken";
        SyntaxKind[SyntaxKind["LessThanEqualsToken"] = 30] = "LessThanEqualsToken";
        SyntaxKind[SyntaxKind["GreaterThanEqualsToken"] = 31] = "GreaterThanEqualsToken";
        SyntaxKind[SyntaxKind["EqualsEqualsToken"] = 32] = "EqualsEqualsToken";
        SyntaxKind[SyntaxKind["ExclamationEqualsToken"] = 33] = "ExclamationEqualsToken";
        SyntaxKind[SyntaxKind["EqualsEqualsEqualsToken"] = 34] = "EqualsEqualsEqualsToken";
        SyntaxKind[SyntaxKind["ExclamationEqualsEqualsToken"] = 35] = "ExclamationEqualsEqualsToken";
        SyntaxKind[SyntaxKind["EqualsGreaterThanToken"] = 36] = "EqualsGreaterThanToken";
        SyntaxKind[SyntaxKind["PlusToken"] = 37] = "PlusToken";
        SyntaxKind[SyntaxKind["MinusToken"] = 38] = "MinusToken";
        SyntaxKind[SyntaxKind["AsteriskToken"] = 39] = "AsteriskToken";
        SyntaxKind[SyntaxKind["AsteriskAsteriskToken"] = 40] = "AsteriskAsteriskToken";
        SyntaxKind[SyntaxKind["SlashToken"] = 41] = "SlashToken";
        SyntaxKind[SyntaxKind["PercentToken"] = 42] = "PercentToken";
        SyntaxKind[SyntaxKind["PlusPlusToken"] = 43] = "PlusPlusToken";
        SyntaxKind[SyntaxKind["MinusMinusToken"] = 44] = "MinusMinusToken";
        SyntaxKind[SyntaxKind["LessThanLessThanToken"] = 45] = "LessThanLessThanToken";
        SyntaxKind[SyntaxKind["GreaterThanGreaterThanToken"] = 46] = "GreaterThanGreaterThanToken";
        SyntaxKind[SyntaxKind["GreaterThanGreaterThanGreaterThanToken"] = 47] = "GreaterThanGreaterThanGreaterThanToken";
        SyntaxKind[SyntaxKind["AmpersandToken"] = 48] = "AmpersandToken";
        SyntaxKind[SyntaxKind["BarToken"] = 49] = "BarToken";
        SyntaxKind[SyntaxKind["CaretToken"] = 50] = "CaretToken";
        SyntaxKind[SyntaxKind["ExclamationToken"] = 51] = "ExclamationToken";
        SyntaxKind[SyntaxKind["TildeToken"] = 52] = "TildeToken";
        SyntaxKind[SyntaxKind["AmpersandAmpersandToken"] = 53] = "AmpersandAmpersandToken";
        SyntaxKind[SyntaxKind["BarBarToken"] = 54] = "BarBarToken";
        SyntaxKind[SyntaxKind["QuestionToken"] = 55] = "QuestionToken";
        SyntaxKind[SyntaxKind["ColonToken"] = 56] = "ColonToken";
        SyntaxKind[SyntaxKind["AtToken"] = 57] = "AtToken";
        // Assignments
        SyntaxKind[SyntaxKind["EqualsToken"] = 58] = "EqualsToken";
        SyntaxKind[SyntaxKind["PlusEqualsToken"] = 59] = "PlusEqualsToken";
        SyntaxKind[SyntaxKind["MinusEqualsToken"] = 60] = "MinusEqualsToken";
        SyntaxKind[SyntaxKind["AsteriskEqualsToken"] = 61] = "AsteriskEqualsToken";
        SyntaxKind[SyntaxKind["AsteriskAsteriskEqualsToken"] = 62] = "AsteriskAsteriskEqualsToken";
        SyntaxKind[SyntaxKind["SlashEqualsToken"] = 63] = "SlashEqualsToken";
        SyntaxKind[SyntaxKind["PercentEqualsToken"] = 64] = "PercentEqualsToken";
        SyntaxKind[SyntaxKind["LessThanLessThanEqualsToken"] = 65] = "LessThanLessThanEqualsToken";
        SyntaxKind[SyntaxKind["GreaterThanGreaterThanEqualsToken"] = 66] = "GreaterThanGreaterThanEqualsToken";
        SyntaxKind[SyntaxKind["GreaterThanGreaterThanGreaterThanEqualsToken"] = 67] = "GreaterThanGreaterThanGreaterThanEqualsToken";
        SyntaxKind[SyntaxKind["AmpersandEqualsToken"] = 68] = "AmpersandEqualsToken";
        SyntaxKind[SyntaxKind["BarEqualsToken"] = 69] = "BarEqualsToken";
        SyntaxKind[SyntaxKind["CaretEqualsToken"] = 70] = "CaretEqualsToken";
        // Identifiers
        SyntaxKind[SyntaxKind["Identifier"] = 71] = "Identifier";
        // Reserved words
        SyntaxKind[SyntaxKind["BreakKeyword"] = 72] = "BreakKeyword";
        SyntaxKind[SyntaxKind["CaseKeyword"] = 73] = "CaseKeyword";
        SyntaxKind[SyntaxKind["CatchKeyword"] = 74] = "CatchKeyword";
        SyntaxKind[SyntaxKind["ClassKeyword"] = 75] = "ClassKeyword";
        SyntaxKind[SyntaxKind["ConstKeyword"] = 76] = "ConstKeyword";
        SyntaxKind[SyntaxKind["ContinueKeyword"] = 77] = "ContinueKeyword";
        SyntaxKind[SyntaxKind["DebuggerKeyword"] = 78] = "DebuggerKeyword";
        SyntaxKind[SyntaxKind["DefaultKeyword"] = 79] = "DefaultKeyword";
        SyntaxKind[SyntaxKind["DeleteKeyword"] = 80] = "DeleteKeyword";
        SyntaxKind[SyntaxKind["DoKeyword"] = 81] = "DoKeyword";
        SyntaxKind[SyntaxKind["ElseKeyword"] = 82] = "ElseKeyword";
        SyntaxKind[SyntaxKind["EnumKeyword"] = 83] = "EnumKeyword";
        SyntaxKind[SyntaxKind["ExportKeyword"] = 84] = "ExportKeyword";
        SyntaxKind[SyntaxKind["ExtendsKeyword"] = 85] = "ExtendsKeyword";
        SyntaxKind[SyntaxKind["FalseKeyword"] = 86] = "FalseKeyword";
        SyntaxKind[SyntaxKind["FinallyKeyword"] = 87] = "FinallyKeyword";
        SyntaxKind[SyntaxKind["ForKeyword"] = 88] = "ForKeyword";
        SyntaxKind[SyntaxKind["FunctionKeyword"] = 89] = "FunctionKeyword";
        SyntaxKind[SyntaxKind["IfKeyword"] = 90] = "IfKeyword";
        SyntaxKind[SyntaxKind["ImportKeyword"] = 91] = "ImportKeyword";
        SyntaxKind[SyntaxKind["InKeyword"] = 92] = "InKeyword";
        SyntaxKind[SyntaxKind["InstanceOfKeyword"] = 93] = "InstanceOfKeyword";
        SyntaxKind[SyntaxKind["NewKeyword"] = 94] = "NewKeyword";
        SyntaxKind[SyntaxKind["NullKeyword"] = 95] = "NullKeyword";
        SyntaxKind[SyntaxKind["ReturnKeyword"] = 96] = "ReturnKeyword";
        SyntaxKind[SyntaxKind["SuperKeyword"] = 97] = "SuperKeyword";
        SyntaxKind[SyntaxKind["SwitchKeyword"] = 98] = "SwitchKeyword";
        SyntaxKind[SyntaxKind["ThisKeyword"] = 99] = "ThisKeyword";
        SyntaxKind[SyntaxKind["ThrowKeyword"] = 100] = "ThrowKeyword";
        SyntaxKind[SyntaxKind["TrueKeyword"] = 101] = "TrueKeyword";
        SyntaxKind[SyntaxKind["TryKeyword"] = 102] = "TryKeyword";
        SyntaxKind[SyntaxKind["TypeOfKeyword"] = 103] = "TypeOfKeyword";
        SyntaxKind[SyntaxKind["VarKeyword"] = 104] = "VarKeyword";
        SyntaxKind[SyntaxKind["VoidKeyword"] = 105] = "VoidKeyword";
        SyntaxKind[SyntaxKind["WhileKeyword"] = 106] = "WhileKeyword";
        SyntaxKind[SyntaxKind["WithKeyword"] = 107] = "WithKeyword";
        // Strict mode reserved words
        SyntaxKind[SyntaxKind["ImplementsKeyword"] = 108] = "ImplementsKeyword";
        SyntaxKind[SyntaxKind["InterfaceKeyword"] = 109] = "InterfaceKeyword";
        SyntaxKind[SyntaxKind["LetKeyword"] = 110] = "LetKeyword";
        SyntaxKind[SyntaxKind["PackageKeyword"] = 111] = "PackageKeyword";
        SyntaxKind[SyntaxKind["PrivateKeyword"] = 112] = "PrivateKeyword";
        SyntaxKind[SyntaxKind["ProtectedKeyword"] = 113] = "ProtectedKeyword";
        SyntaxKind[SyntaxKind["PublicKeyword"] = 114] = "PublicKeyword";
        SyntaxKind[SyntaxKind["StaticKeyword"] = 115] = "StaticKeyword";
        SyntaxKind[SyntaxKind["YieldKeyword"] = 116] = "YieldKeyword";
        // Contextual keywords
        SyntaxKind[SyntaxKind["AbstractKeyword"] = 117] = "AbstractKeyword";
        SyntaxKind[SyntaxKind["AsKeyword"] = 118] = "AsKeyword";
        SyntaxKind[SyntaxKind["AnyKeyword"] = 119] = "AnyKeyword";
        SyntaxKind[SyntaxKind["AsyncKeyword"] = 120] = "AsyncKeyword";
        SyntaxKind[SyntaxKind["AwaitKeyword"] = 121] = "AwaitKeyword";
        SyntaxKind[SyntaxKind["BooleanKeyword"] = 122] = "BooleanKeyword";
        SyntaxKind[SyntaxKind["ConstructorKeyword"] = 123] = "ConstructorKeyword";
        SyntaxKind[SyntaxKind["DeclareKeyword"] = 124] = "DeclareKeyword";
        SyntaxKind[SyntaxKind["GetKeyword"] = 125] = "GetKeyword";
        SyntaxKind[SyntaxKind["InferKeyword"] = 126] = "InferKeyword";
        SyntaxKind[SyntaxKind["IsKeyword"] = 127] = "IsKeyword";
        SyntaxKind[SyntaxKind["KeyOfKeyword"] = 128] = "KeyOfKeyword";
        SyntaxKind[SyntaxKind["ModuleKeyword"] = 129] = "ModuleKeyword";
        SyntaxKind[SyntaxKind["NamespaceKeyword"] = 130] = "NamespaceKeyword";
        SyntaxKind[SyntaxKind["NeverKeyword"] = 131] = "NeverKeyword";
        SyntaxKind[SyntaxKind["ReadonlyKeyword"] = 132] = "ReadonlyKeyword";
        SyntaxKind[SyntaxKind["RequireKeyword"] = 133] = "RequireKeyword";
        SyntaxKind[SyntaxKind["NumberKeyword"] = 134] = "NumberKeyword";
        SyntaxKind[SyntaxKind["ObjectKeyword"] = 135] = "ObjectKeyword";
        SyntaxKind[SyntaxKind["SetKeyword"] = 136] = "SetKeyword";
        SyntaxKind[SyntaxKind["StringKeyword"] = 137] = "StringKeyword";
        SyntaxKind[SyntaxKind["SymbolKeyword"] = 138] = "SymbolKeyword";
        SyntaxKind[SyntaxKind["TypeKeyword"] = 139] = "TypeKeyword";
        SyntaxKind[SyntaxKind["UndefinedKeyword"] = 140] = "UndefinedKeyword";
        SyntaxKind[SyntaxKind["UniqueKeyword"] = 141] = "UniqueKeyword";
        SyntaxKind[SyntaxKind["UnknownKeyword"] = 142] = "UnknownKeyword";
        SyntaxKind[SyntaxKind["FromKeyword"] = 143] = "FromKeyword";
        SyntaxKind[SyntaxKind["GlobalKeyword"] = 144] = "GlobalKeyword";
        SyntaxKind[SyntaxKind["OfKeyword"] = 145] = "OfKeyword";
        // Parse tree nodes
        // Names
        SyntaxKind[SyntaxKind["QualifiedName"] = 146] = "QualifiedName";
        SyntaxKind[SyntaxKind["ComputedPropertyName"] = 147] = "ComputedPropertyName";
        // Signature elements
        SyntaxKind[SyntaxKind["TypeParameter"] = 148] = "TypeParameter";
        SyntaxKind[SyntaxKind["Parameter"] = 149] = "Parameter";
        SyntaxKind[SyntaxKind["Decorator"] = 150] = "Decorator";
        // TypeMember
        SyntaxKind[SyntaxKind["PropertySignature"] = 151] = "PropertySignature";
        SyntaxKind[SyntaxKind["PropertyDeclaration"] = 152] = "PropertyDeclaration";
        SyntaxKind[SyntaxKind["MethodSignature"] = 153] = "MethodSignature";
        SyntaxKind[SyntaxKind["MethodDeclaration"] = 154] = "MethodDeclaration";
        SyntaxKind[SyntaxKind["Constructor"] = 155] = "Constructor";
        SyntaxKind[SyntaxKind["GetAccessor"] = 156] = "GetAccessor";
        SyntaxKind[SyntaxKind["SetAccessor"] = 157] = "SetAccessor";
        SyntaxKind[SyntaxKind["CallSignature"] = 158] = "CallSignature";
        SyntaxKind[SyntaxKind["ConstructSignature"] = 159] = "ConstructSignature";
        SyntaxKind[SyntaxKind["IndexSignature"] = 160] = "IndexSignature";
        // Type
        SyntaxKind[SyntaxKind["TypePredicate"] = 161] = "TypePredicate";
        SyntaxKind[SyntaxKind["TypeReference"] = 162] = "TypeReference";
        SyntaxKind[SyntaxKind["FunctionType"] = 163] = "FunctionType";
        SyntaxKind[SyntaxKind["ConstructorType"] = 164] = "ConstructorType";
        SyntaxKind[SyntaxKind["TypeQuery"] = 165] = "TypeQuery";
        SyntaxKind[SyntaxKind["TypeLiteral"] = 166] = "TypeLiteral";
        SyntaxKind[SyntaxKind["ArrayType"] = 167] = "ArrayType";
        SyntaxKind[SyntaxKind["TupleType"] = 168] = "TupleType";
        SyntaxKind[SyntaxKind["UnionType"] = 169] = "UnionType";
        SyntaxKind[SyntaxKind["IntersectionType"] = 170] = "IntersectionType";
        SyntaxKind[SyntaxKind["ConditionalType"] = 171] = "ConditionalType";
        SyntaxKind[SyntaxKind["InferType"] = 172] = "InferType";
        SyntaxKind[SyntaxKind["ParenthesizedType"] = 173] = "ParenthesizedType";
        SyntaxKind[SyntaxKind["ThisType"] = 174] = "ThisType";
        SyntaxKind[SyntaxKind["TypeOperator"] = 175] = "TypeOperator";
        SyntaxKind[SyntaxKind["IndexedAccessType"] = 176] = "IndexedAccessType";
        SyntaxKind[SyntaxKind["MappedType"] = 177] = "MappedType";
        SyntaxKind[SyntaxKind["LiteralType"] = 178] = "LiteralType";
        SyntaxKind[SyntaxKind["ImportType"] = 179] = "ImportType";
        // Binding patterns
        SyntaxKind[SyntaxKind["ObjectBindingPattern"] = 180] = "ObjectBindingPattern";
        SyntaxKind[SyntaxKind["ArrayBindingPattern"] = 181] = "ArrayBindingPattern";
        SyntaxKind[SyntaxKind["BindingElement"] = 182] = "BindingElement";
        // Expression
        SyntaxKind[SyntaxKind["ArrayLiteralExpression"] = 183] = "ArrayLiteralExpression";
        SyntaxKind[SyntaxKind["ObjectLiteralExpression"] = 184] = "ObjectLiteralExpression";
        SyntaxKind[SyntaxKind["PropertyAccessExpression"] = 185] = "PropertyAccessExpression";
        SyntaxKind[SyntaxKind["ElementAccessExpression"] = 186] = "ElementAccessExpression";
        SyntaxKind[SyntaxKind["CallExpression"] = 187] = "CallExpression";
        SyntaxKind[SyntaxKind["NewExpression"] = 188] = "NewExpression";
        SyntaxKind[SyntaxKind["TaggedTemplateExpression"] = 189] = "TaggedTemplateExpression";
        SyntaxKind[SyntaxKind["TypeAssertionExpression"] = 190] = "TypeAssertionExpression";
        SyntaxKind[SyntaxKind["ParenthesizedExpression"] = 191] = "ParenthesizedExpression";
        SyntaxKind[SyntaxKind["FunctionExpression"] = 192] = "FunctionExpression";
        SyntaxKind[SyntaxKind["ArrowFunction"] = 193] = "ArrowFunction";
        SyntaxKind[SyntaxKind["DeleteExpression"] = 194] = "DeleteExpression";
        SyntaxKind[SyntaxKind["TypeOfExpression"] = 195] = "TypeOfExpression";
        SyntaxKind[SyntaxKind["VoidExpression"] = 196] = "VoidExpression";
        SyntaxKind[SyntaxKind["AwaitExpression"] = 197] = "AwaitExpression";
        SyntaxKind[SyntaxKind["PrefixUnaryExpression"] = 198] = "PrefixUnaryExpression";
        SyntaxKind[SyntaxKind["PostfixUnaryExpression"] = 199] = "PostfixUnaryExpression";
        SyntaxKind[SyntaxKind["BinaryExpression"] = 200] = "BinaryExpression";
        SyntaxKind[SyntaxKind["ConditionalExpression"] = 201] = "ConditionalExpression";
        SyntaxKind[SyntaxKind["TemplateExpression"] = 202] = "TemplateExpression";
        SyntaxKind[SyntaxKind["YieldExpression"] = 203] = "YieldExpression";
        SyntaxKind[SyntaxKind["SpreadElement"] = 204] = "SpreadElement";
        SyntaxKind[SyntaxKind["ClassExpression"] = 205] = "ClassExpression";
        SyntaxKind[SyntaxKind["OmittedExpression"] = 206] = "OmittedExpression";
        SyntaxKind[SyntaxKind["ExpressionWithTypeArguments"] = 207] = "ExpressionWithTypeArguments";
        SyntaxKind[SyntaxKind["AsExpression"] = 208] = "AsExpression";
        SyntaxKind[SyntaxKind["NonNullExpression"] = 209] = "NonNullExpression";
        SyntaxKind[SyntaxKind["MetaProperty"] = 210] = "MetaProperty";
        // Misc
        SyntaxKind[SyntaxKind["TemplateSpan"] = 211] = "TemplateSpan";
        SyntaxKind[SyntaxKind["SemicolonClassElement"] = 212] = "SemicolonClassElement";
        // Element
        SyntaxKind[SyntaxKind["Block"] = 213] = "Block";
        SyntaxKind[SyntaxKind["VariableStatement"] = 214] = "VariableStatement";
        SyntaxKind[SyntaxKind["EmptyStatement"] = 215] = "EmptyStatement";
        SyntaxKind[SyntaxKind["ExpressionStatement"] = 216] = "ExpressionStatement";
        SyntaxKind[SyntaxKind["IfStatement"] = 217] = "IfStatement";
        SyntaxKind[SyntaxKind["DoStatement"] = 218] = "DoStatement";
        SyntaxKind[SyntaxKind["WhileStatement"] = 219] = "WhileStatement";
        SyntaxKind[SyntaxKind["ForStatement"] = 220] = "ForStatement";
        SyntaxKind[SyntaxKind["ForInStatement"] = 221] = "ForInStatement";
        SyntaxKind[SyntaxKind["ForOfStatement"] = 222] = "ForOfStatement";
        SyntaxKind[SyntaxKind["ContinueStatement"] = 223] = "ContinueStatement";
        SyntaxKind[SyntaxKind["BreakStatement"] = 224] = "BreakStatement";
        SyntaxKind[SyntaxKind["ReturnStatement"] = 225] = "ReturnStatement";
        SyntaxKind[SyntaxKind["WithStatement"] = 226] = "WithStatement";
        SyntaxKind[SyntaxKind["SwitchStatement"] = 227] = "SwitchStatement";
        SyntaxKind[SyntaxKind["LabeledStatement"] = 228] = "LabeledStatement";
        SyntaxKind[SyntaxKind["ThrowStatement"] = 229] = "ThrowStatement";
        SyntaxKind[SyntaxKind["TryStatement"] = 230] = "TryStatement";
        SyntaxKind[SyntaxKind["DebuggerStatement"] = 231] = "DebuggerStatement";
        SyntaxKind[SyntaxKind["VariableDeclaration"] = 232] = "VariableDeclaration";
        SyntaxKind[SyntaxKind["VariableDeclarationList"] = 233] = "VariableDeclarationList";
        SyntaxKind[SyntaxKind["FunctionDeclaration"] = 234] = "FunctionDeclaration";
        SyntaxKind[SyntaxKind["ClassDeclaration"] = 235] = "ClassDeclaration";
        SyntaxKind[SyntaxKind["InterfaceDeclaration"] = 236] = "InterfaceDeclaration";
        SyntaxKind[SyntaxKind["TypeAliasDeclaration"] = 237] = "TypeAliasDeclaration";
        SyntaxKind[SyntaxKind["EnumDeclaration"] = 238] = "EnumDeclaration";
        SyntaxKind[SyntaxKind["ModuleDeclaration"] = 239] = "ModuleDeclaration";
        SyntaxKind[SyntaxKind["ModuleBlock"] = 240] = "ModuleBlock";
        SyntaxKind[SyntaxKind["CaseBlock"] = 241] = "CaseBlock";
        SyntaxKind[SyntaxKind["NamespaceExportDeclaration"] = 242] = "NamespaceExportDeclaration";
        SyntaxKind[SyntaxKind["ImportEqualsDeclaration"] = 243] = "ImportEqualsDeclaration";
        SyntaxKind[SyntaxKind["ImportDeclaration"] = 244] = "ImportDeclaration";
        SyntaxKind[SyntaxKind["ImportClause"] = 245] = "ImportClause";
        SyntaxKind[SyntaxKind["NamespaceImport"] = 246] = "NamespaceImport";
        SyntaxKind[SyntaxKind["NamedImports"] = 247] = "NamedImports";
        SyntaxKind[SyntaxKind["ImportSpecifier"] = 248] = "ImportSpecifier";
        SyntaxKind[SyntaxKind["ExportAssignment"] = 249] = "ExportAssignment";
        SyntaxKind[SyntaxKind["ExportDeclaration"] = 250] = "ExportDeclaration";
        SyntaxKind[SyntaxKind["NamedExports"] = 251] = "NamedExports";
        SyntaxKind[SyntaxKind["ExportSpecifier"] = 252] = "ExportSpecifier";
        SyntaxKind[SyntaxKind["MissingDeclaration"] = 253] = "MissingDeclaration";
        // Module references
        SyntaxKind[SyntaxKind["ExternalModuleReference"] = 254] = "ExternalModuleReference";
        // JSX
        SyntaxKind[SyntaxKind["JsxElement"] = 255] = "JsxElement";
        SyntaxKind[SyntaxKind["JsxSelfClosingElement"] = 256] = "JsxSelfClosingElement";
        SyntaxKind[SyntaxKind["JsxOpeningElement"] = 257] = "JsxOpeningElement";
        SyntaxKind[SyntaxKind["JsxClosingElement"] = 258] = "JsxClosingElement";
        SyntaxKind[SyntaxKind["JsxFragment"] = 259] = "JsxFragment";
        SyntaxKind[SyntaxKind["JsxOpeningFragment"] = 260] = "JsxOpeningFragment";
        SyntaxKind[SyntaxKind["JsxClosingFragment"] = 261] = "JsxClosingFragment";
        SyntaxKind[SyntaxKind["JsxAttribute"] = 262] = "JsxAttribute";
        SyntaxKind[SyntaxKind["JsxAttributes"] = 263] = "JsxAttributes";
        SyntaxKind[SyntaxKind["JsxSpreadAttribute"] = 264] = "JsxSpreadAttribute";
        SyntaxKind[SyntaxKind["JsxExpression"] = 265] = "JsxExpression";
        // Clauses
        SyntaxKind[SyntaxKind["CaseClause"] = 266] = "CaseClause";
        SyntaxKind[SyntaxKind["DefaultClause"] = 267] = "DefaultClause";
        SyntaxKind[SyntaxKind["HeritageClause"] = 268] = "HeritageClause";
        SyntaxKind[SyntaxKind["CatchClause"] = 269] = "CatchClause";
        // Property assignments
        SyntaxKind[SyntaxKind["PropertyAssignment"] = 270] = "PropertyAssignment";
        SyntaxKind[SyntaxKind["ShorthandPropertyAssignment"] = 271] = "ShorthandPropertyAssignment";
        SyntaxKind[SyntaxKind["SpreadAssignment"] = 272] = "SpreadAssignment";
        // Enum
        SyntaxKind[SyntaxKind["EnumMember"] = 273] = "EnumMember";
        // Top-level nodes
        SyntaxKind[SyntaxKind["SourceFile"] = 274] = "SourceFile";
        SyntaxKind[SyntaxKind["Bundle"] = 275] = "Bundle";
        SyntaxKind[SyntaxKind["UnparsedSource"] = 276] = "UnparsedSource";
        SyntaxKind[SyntaxKind["InputFiles"] = 277] = "InputFiles";
        // JSDoc nodes
        SyntaxKind[SyntaxKind["JSDocTypeExpression"] = 278] = "JSDocTypeExpression";
        // The * type
        SyntaxKind[SyntaxKind["JSDocAllType"] = 279] = "JSDocAllType";
        // The ? type
        SyntaxKind[SyntaxKind["JSDocUnknownType"] = 280] = "JSDocUnknownType";
        SyntaxKind[SyntaxKind["JSDocNullableType"] = 281] = "JSDocNullableType";
        SyntaxKind[SyntaxKind["JSDocNonNullableType"] = 282] = "JSDocNonNullableType";
        SyntaxKind[SyntaxKind["JSDocOptionalType"] = 283] = "JSDocOptionalType";
        SyntaxKind[SyntaxKind["JSDocFunctionType"] = 284] = "JSDocFunctionType";
        SyntaxKind[SyntaxKind["JSDocVariadicType"] = 285] = "JSDocVariadicType";
        SyntaxKind[SyntaxKind["JSDocComment"] = 286] = "JSDocComment";
        SyntaxKind[SyntaxKind["JSDocTypeLiteral"] = 287] = "JSDocTypeLiteral";
        SyntaxKind[SyntaxKind["JSDocSignature"] = 288] = "JSDocSignature";
        SyntaxKind[SyntaxKind["JSDocTag"] = 289] = "JSDocTag";
        SyntaxKind[SyntaxKind["JSDocAugmentsTag"] = 290] = "JSDocAugmentsTag";
        SyntaxKind[SyntaxKind["JSDocClassTag"] = 291] = "JSDocClassTag";
        SyntaxKind[SyntaxKind["JSDocCallbackTag"] = 292] = "JSDocCallbackTag";
        SyntaxKind[SyntaxKind["JSDocParameterTag"] = 293] = "JSDocParameterTag";
        SyntaxKind[SyntaxKind["JSDocReturnTag"] = 294] = "JSDocReturnTag";
        SyntaxKind[SyntaxKind["JSDocTypeTag"] = 295] = "JSDocTypeTag";
        SyntaxKind[SyntaxKind["JSDocTemplateTag"] = 296] = "JSDocTemplateTag";
        SyntaxKind[SyntaxKind["JSDocTypedefTag"] = 297] = "JSDocTypedefTag";
        SyntaxKind[SyntaxKind["JSDocPropertyTag"] = 298] = "JSDocPropertyTag";
        // Synthesized list
        SyntaxKind[SyntaxKind["SyntaxList"] = 299] = "SyntaxList";
        // Transformation nodes
        SyntaxKind[SyntaxKind["NotEmittedStatement"] = 300] = "NotEmittedStatement";
        SyntaxKind[SyntaxKind["PartiallyEmittedExpression"] = 301] = "PartiallyEmittedExpression";
        SyntaxKind[SyntaxKind["CommaListExpression"] = 302] = "CommaListExpression";
        SyntaxKind[SyntaxKind["MergeDeclarationMarker"] = 303] = "MergeDeclarationMarker";
        SyntaxKind[SyntaxKind["EndOfDeclarationMarker"] = 304] = "EndOfDeclarationMarker";
        // Enum value count
        SyntaxKind[SyntaxKind["Count"] = 305] = "Count";
        // Markers
        SyntaxKind[SyntaxKind["FirstAssignment"] = 58] = "FirstAssignment";
        SyntaxKind[SyntaxKind["LastAssignment"] = 70] = "LastAssignment";
        SyntaxKind[SyntaxKind["FirstCompoundAssignment"] = 59] = "FirstCompoundAssignment";
        SyntaxKind[SyntaxKind["LastCompoundAssignment"] = 70] = "LastCompoundAssignment";
        SyntaxKind[SyntaxKind["FirstReservedWord"] = 72] = "FirstReservedWord";
        SyntaxKind[SyntaxKind["LastReservedWord"] = 107] = "LastReservedWord";
        SyntaxKind[SyntaxKind["FirstKeyword"] = 72] = "FirstKeyword";
        SyntaxKind[SyntaxKind["LastKeyword"] = 145] = "LastKeyword";
        SyntaxKind[SyntaxKind["FirstFutureReservedWord"] = 108] = "FirstFutureReservedWord";
        SyntaxKind[SyntaxKind["LastFutureReservedWord"] = 116] = "LastFutureReservedWord";
        SyntaxKind[SyntaxKind["FirstTypeNode"] = 161] = "FirstTypeNode";
        SyntaxKind[SyntaxKind["LastTypeNode"] = 179] = "LastTypeNode";
        SyntaxKind[SyntaxKind["FirstPunctuation"] = 17] = "FirstPunctuation";
        SyntaxKind[SyntaxKind["LastPunctuation"] = 70] = "LastPunctuation";
        SyntaxKind[SyntaxKind["FirstToken"] = 0] = "FirstToken";
        SyntaxKind[SyntaxKind["LastToken"] = 145] = "LastToken";
        SyntaxKind[SyntaxKind["FirstTriviaToken"] = 2] = "FirstTriviaToken";
        SyntaxKind[SyntaxKind["LastTriviaToken"] = 7] = "LastTriviaToken";
        SyntaxKind[SyntaxKind["FirstLiteralToken"] = 8] = "FirstLiteralToken";
        SyntaxKind[SyntaxKind["LastLiteralToken"] = 13] = "LastLiteralToken";
        SyntaxKind[SyntaxKind["FirstTemplateToken"] = 13] = "FirstTemplateToken";
        SyntaxKind[SyntaxKind["LastTemplateToken"] = 16] = "LastTemplateToken";
        SyntaxKind[SyntaxKind["FirstBinaryOperator"] = 27] = "FirstBinaryOperator";
        SyntaxKind[SyntaxKind["LastBinaryOperator"] = 70] = "LastBinaryOperator";
        SyntaxKind[SyntaxKind["FirstNode"] = 146] = "FirstNode";
        SyntaxKind[SyntaxKind["FirstJSDocNode"] = 278] = "FirstJSDocNode";
        SyntaxKind[SyntaxKind["LastJSDocNode"] = 298] = "LastJSDocNode";
        SyntaxKind[SyntaxKind["FirstJSDocTagNode"] = 289] = "FirstJSDocTagNode";
        SyntaxKind[SyntaxKind["LastJSDocTagNode"] = 298] = "LastJSDocTagNode";
        /* @internal */ SyntaxKind[SyntaxKind["FirstContextualKeyword"] = 117] = "FirstContextualKeyword";
        /* @internal */ SyntaxKind[SyntaxKind["LastContextualKeyword"] = 145] = "LastContextualKeyword";
    })(SyntaxKind = ts.SyntaxKind || (ts.SyntaxKind = {}));
    var NodeFlags;
    (function (NodeFlags) {
        NodeFlags[NodeFlags["None"] = 0] = "None";
        NodeFlags[NodeFlags["Let"] = 1] = "Let";
        NodeFlags[NodeFlags["Const"] = 2] = "Const";
        NodeFlags[NodeFlags["NestedNamespace"] = 4] = "NestedNamespace";
        NodeFlags[NodeFlags["Synthesized"] = 8] = "Synthesized";
        NodeFlags[NodeFlags["Namespace"] = 16] = "Namespace";
        NodeFlags[NodeFlags["ExportContext"] = 32] = "ExportContext";
        NodeFlags[NodeFlags["ContainsThis"] = 64] = "ContainsThis";
        NodeFlags[NodeFlags["HasImplicitReturn"] = 128] = "HasImplicitReturn";
        NodeFlags[NodeFlags["HasExplicitReturn"] = 256] = "HasExplicitReturn";
        NodeFlags[NodeFlags["GlobalAugmentation"] = 512] = "GlobalAugmentation";
        NodeFlags[NodeFlags["HasAsyncFunctions"] = 1024] = "HasAsyncFunctions";
        NodeFlags[NodeFlags["DisallowInContext"] = 2048] = "DisallowInContext";
        NodeFlags[NodeFlags["YieldContext"] = 4096] = "YieldContext";
        NodeFlags[NodeFlags["DecoratorContext"] = 8192] = "DecoratorContext";
        NodeFlags[NodeFlags["AwaitContext"] = 16384] = "AwaitContext";
        NodeFlags[NodeFlags["ThisNodeHasError"] = 32768] = "ThisNodeHasError";
        NodeFlags[NodeFlags["JavaScriptFile"] = 65536] = "JavaScriptFile";
        NodeFlags[NodeFlags["ThisNodeOrAnySubNodesHasError"] = 131072] = "ThisNodeOrAnySubNodesHasError";
        NodeFlags[NodeFlags["HasAggregatedChildData"] = 262144] = "HasAggregatedChildData";
        // These flags will be set when the parser encounters a dynamic import expression or 'import.meta' to avoid
        // walking the tree if the flags are not set. However, these flags are just a approximation
        // (hence why it's named "PossiblyContainsDynamicImport") because once set, the flags never get cleared.
        // During editing, if a dynamic import is removed, incremental parsing will *NOT* clear this flag.
        // This means that the tree will always be traversed during module resolution, or when looking for external module indicators.
        // However, the removal operation should not occur often and in the case of the
        // removal, it is likely that users will add the import anyway.
        // The advantage of this approach is its simplicity. For the case of batch compilation,
        // we guarantee that users won't have to pay the price of walking the tree if a dynamic import isn't used.
        /* @internal */ NodeFlags[NodeFlags["PossiblyContainsDynamicImport"] = 524288] = "PossiblyContainsDynamicImport";
        /* @internal */ NodeFlags[NodeFlags["PossiblyContainsImportMeta"] = 1048576] = "PossiblyContainsImportMeta";
        NodeFlags[NodeFlags["JSDoc"] = 2097152] = "JSDoc";
        /* @internal */ NodeFlags[NodeFlags["Ambient"] = 4194304] = "Ambient";
        /* @internal */ NodeFlags[NodeFlags["InWithStatement"] = 8388608] = "InWithStatement";
        NodeFlags[NodeFlags["JsonFile"] = 16777216] = "JsonFile";
        NodeFlags[NodeFlags["BlockScoped"] = 3] = "BlockScoped";
        NodeFlags[NodeFlags["ReachabilityCheckFlags"] = 384] = "ReachabilityCheckFlags";
        NodeFlags[NodeFlags["ReachabilityAndEmitFlags"] = 1408] = "ReachabilityAndEmitFlags";
        // Parsing context flags
        NodeFlags[NodeFlags["ContextFlags"] = 12679168] = "ContextFlags";
        // Exclude these flags when parsing a Type
        NodeFlags[NodeFlags["TypeExcludesFlags"] = 20480] = "TypeExcludesFlags";
        // Represents all flags that are potentially set once and
        // never cleared on SourceFiles which get re-used in between incremental parses.
        // See the comment above on `PossiblyContainsDynamicImport` and `PossiblyContainsImportMeta`.
        /* @internal */ NodeFlags[NodeFlags["PermanentlySetIncrementalFlags"] = 1572864] = "PermanentlySetIncrementalFlags";
    })(NodeFlags = ts.NodeFlags || (ts.NodeFlags = {}));
    var ModifierFlags;
    (function (ModifierFlags) {
        ModifierFlags[ModifierFlags["None"] = 0] = "None";
        ModifierFlags[ModifierFlags["Export"] = 1] = "Export";
        ModifierFlags[ModifierFlags["Ambient"] = 2] = "Ambient";
        ModifierFlags[ModifierFlags["Public"] = 4] = "Public";
        ModifierFlags[ModifierFlags["Private"] = 8] = "Private";
        ModifierFlags[ModifierFlags["Protected"] = 16] = "Protected";
        ModifierFlags[ModifierFlags["Static"] = 32] = "Static";
        ModifierFlags[ModifierFlags["Readonly"] = 64] = "Readonly";
        ModifierFlags[ModifierFlags["Abstract"] = 128] = "Abstract";
        ModifierFlags[ModifierFlags["Async"] = 256] = "Async";
        ModifierFlags[ModifierFlags["Default"] = 512] = "Default";
        ModifierFlags[ModifierFlags["Const"] = 2048] = "Const";
        ModifierFlags[ModifierFlags["HasComputedFlags"] = 536870912] = "HasComputedFlags";
        ModifierFlags[ModifierFlags["AccessibilityModifier"] = 28] = "AccessibilityModifier";
        // Accessibility modifiers and 'readonly' can be attached to a parameter in a constructor to make it a property.
        ModifierFlags[ModifierFlags["ParameterPropertyModifier"] = 92] = "ParameterPropertyModifier";
        ModifierFlags[ModifierFlags["NonPublicAccessibilityModifier"] = 24] = "NonPublicAccessibilityModifier";
        ModifierFlags[ModifierFlags["TypeScriptModifier"] = 2270] = "TypeScriptModifier";
        ModifierFlags[ModifierFlags["ExportDefault"] = 513] = "ExportDefault";
        ModifierFlags[ModifierFlags["All"] = 3071] = "All";
    })(ModifierFlags = ts.ModifierFlags || (ts.ModifierFlags = {}));
    var JsxFlags;
    (function (JsxFlags) {
        JsxFlags[JsxFlags["None"] = 0] = "None";
        /** An element from a named property of the JSX.IntrinsicElements interface */
        JsxFlags[JsxFlags["IntrinsicNamedElement"] = 1] = "IntrinsicNamedElement";
        /** An element inferred from the string index signature of the JSX.IntrinsicElements interface */
        JsxFlags[JsxFlags["IntrinsicIndexedElement"] = 2] = "IntrinsicIndexedElement";
        JsxFlags[JsxFlags["IntrinsicElement"] = 3] = "IntrinsicElement";
    })(JsxFlags = ts.JsxFlags || (ts.JsxFlags = {}));
    /* @internal */
    var RelationComparisonResult;
    (function (RelationComparisonResult) {
        RelationComparisonResult[RelationComparisonResult["Succeeded"] = 1] = "Succeeded";
        RelationComparisonResult[RelationComparisonResult["Failed"] = 2] = "Failed";
        RelationComparisonResult[RelationComparisonResult["FailedAndReported"] = 3] = "FailedAndReported";
    })(RelationComparisonResult = ts.RelationComparisonResult || (ts.RelationComparisonResult = {}));
    /*@internal*/
    var GeneratedIdentifierFlags;
    (function (GeneratedIdentifierFlags) {
        // Kinds
        GeneratedIdentifierFlags[GeneratedIdentifierFlags["None"] = 0] = "None";
        GeneratedIdentifierFlags[GeneratedIdentifierFlags["Auto"] = 1] = "Auto";
        GeneratedIdentifierFlags[GeneratedIdentifierFlags["Loop"] = 2] = "Loop";
        GeneratedIdentifierFlags[GeneratedIdentifierFlags["Unique"] = 3] = "Unique";
        GeneratedIdentifierFlags[GeneratedIdentifierFlags["Node"] = 4] = "Node";
        GeneratedIdentifierFlags[GeneratedIdentifierFlags["KindMask"] = 7] = "KindMask";
        // Flags
        GeneratedIdentifierFlags[GeneratedIdentifierFlags["ReservedInNestedScopes"] = 8] = "ReservedInNestedScopes";
        GeneratedIdentifierFlags[GeneratedIdentifierFlags["Optimistic"] = 16] = "Optimistic";
        GeneratedIdentifierFlags[GeneratedIdentifierFlags["FileLevel"] = 32] = "FileLevel";
    })(GeneratedIdentifierFlags = ts.GeneratedIdentifierFlags || (ts.GeneratedIdentifierFlags = {}));
    /* @internal */
    var TokenFlags;
    (function (TokenFlags) {
        TokenFlags[TokenFlags["None"] = 0] = "None";
        TokenFlags[TokenFlags["PrecedingLineBreak"] = 1] = "PrecedingLineBreak";
        TokenFlags[TokenFlags["PrecedingJSDocComment"] = 2] = "PrecedingJSDocComment";
        TokenFlags[TokenFlags["Unterminated"] = 4] = "Unterminated";
        TokenFlags[TokenFlags["ExtendedUnicodeEscape"] = 8] = "ExtendedUnicodeEscape";
        TokenFlags[TokenFlags["Scientific"] = 16] = "Scientific";
        TokenFlags[TokenFlags["Octal"] = 32] = "Octal";
        TokenFlags[TokenFlags["HexSpecifier"] = 64] = "HexSpecifier";
        TokenFlags[TokenFlags["BinarySpecifier"] = 128] = "BinarySpecifier";
        TokenFlags[TokenFlags["OctalSpecifier"] = 256] = "OctalSpecifier";
        TokenFlags[TokenFlags["ContainsSeparator"] = 512] = "ContainsSeparator";
        TokenFlags[TokenFlags["BinaryOrOctalSpecifier"] = 384] = "BinaryOrOctalSpecifier";
        TokenFlags[TokenFlags["NumericLiteralFlags"] = 1008] = "NumericLiteralFlags";
    })(TokenFlags = ts.TokenFlags || (ts.TokenFlags = {}));
    var FlowFlags;
    (function (FlowFlags) {
        FlowFlags[FlowFlags["Unreachable"] = 1] = "Unreachable";
        FlowFlags[FlowFlags["Start"] = 2] = "Start";
        FlowFlags[FlowFlags["BranchLabel"] = 4] = "BranchLabel";
        FlowFlags[FlowFlags["LoopLabel"] = 8] = "LoopLabel";
        FlowFlags[FlowFlags["Assignment"] = 16] = "Assignment";
        FlowFlags[FlowFlags["TrueCondition"] = 32] = "TrueCondition";
        FlowFlags[FlowFlags["FalseCondition"] = 64] = "FalseCondition";
        FlowFlags[FlowFlags["SwitchClause"] = 128] = "SwitchClause";
        FlowFlags[FlowFlags["ArrayMutation"] = 256] = "ArrayMutation";
        FlowFlags[FlowFlags["Referenced"] = 512] = "Referenced";
        FlowFlags[FlowFlags["Shared"] = 1024] = "Shared";
        FlowFlags[FlowFlags["PreFinally"] = 2048] = "PreFinally";
        FlowFlags[FlowFlags["AfterFinally"] = 4096] = "AfterFinally";
        FlowFlags[FlowFlags["Label"] = 12] = "Label";
        FlowFlags[FlowFlags["Condition"] = 96] = "Condition";
    })(FlowFlags = ts.FlowFlags || (ts.FlowFlags = {}));
    var OperationCanceledException = /** @class */ (function () {
        function OperationCanceledException() {
        }
        return OperationCanceledException;
    }());
    ts.OperationCanceledException = OperationCanceledException;
    /* @internal */
    var StructureIsReused;
    (function (StructureIsReused) {
        StructureIsReused[StructureIsReused["Not"] = 0] = "Not";
        StructureIsReused[StructureIsReused["SafeModules"] = 1] = "SafeModules";
        StructureIsReused[StructureIsReused["Completely"] = 2] = "Completely";
    })(StructureIsReused = ts.StructureIsReused || (ts.StructureIsReused = {}));
    /** Return code used by getEmitOutput function to indicate status of the function */
    var ExitStatus;
    (function (ExitStatus) {
        // Compiler ran successfully.  Either this was a simple do-nothing compilation (for example,
        // when -version or -help was provided, or this was a normal compilation, no diagnostics
        // were produced, and all outputs were generated successfully.
        ExitStatus[ExitStatus["Success"] = 0] = "Success";
        // Diagnostics were produced and because of them no code was generated.
        ExitStatus[ExitStatus["DiagnosticsPresent_OutputsSkipped"] = 1] = "DiagnosticsPresent_OutputsSkipped";
        // Diagnostics were produced and outputs were generated in spite of them.
        ExitStatus[ExitStatus["DiagnosticsPresent_OutputsGenerated"] = 2] = "DiagnosticsPresent_OutputsGenerated";
    })(ExitStatus = ts.ExitStatus || (ts.ExitStatus = {}));
    /* @internal */
    var UnionReduction;
    (function (UnionReduction) {
        UnionReduction[UnionReduction["None"] = 0] = "None";
        UnionReduction[UnionReduction["Literal"] = 1] = "Literal";
        UnionReduction[UnionReduction["Subtype"] = 2] = "Subtype";
    })(UnionReduction = ts.UnionReduction || (ts.UnionReduction = {}));
    var NodeBuilderFlags;
    (function (NodeBuilderFlags) {
        NodeBuilderFlags[NodeBuilderFlags["None"] = 0] = "None";
        // Options
        NodeBuilderFlags[NodeBuilderFlags["NoTruncation"] = 1] = "NoTruncation";
        NodeBuilderFlags[NodeBuilderFlags["WriteArrayAsGenericType"] = 2] = "WriteArrayAsGenericType";
        NodeBuilderFlags[NodeBuilderFlags["GenerateNamesForShadowedTypeParams"] = 4] = "GenerateNamesForShadowedTypeParams";
        NodeBuilderFlags[NodeBuilderFlags["UseStructuralFallback"] = 8] = "UseStructuralFallback";
        NodeBuilderFlags[NodeBuilderFlags["ForbidIndexedAccessSymbolReferences"] = 16] = "ForbidIndexedAccessSymbolReferences";
        NodeBuilderFlags[NodeBuilderFlags["WriteTypeArgumentsOfSignature"] = 32] = "WriteTypeArgumentsOfSignature";
        NodeBuilderFlags[NodeBuilderFlags["UseFullyQualifiedType"] = 64] = "UseFullyQualifiedType";
        NodeBuilderFlags[NodeBuilderFlags["UseOnlyExternalAliasing"] = 128] = "UseOnlyExternalAliasing";
        NodeBuilderFlags[NodeBuilderFlags["SuppressAnyReturnType"] = 256] = "SuppressAnyReturnType";
        NodeBuilderFlags[NodeBuilderFlags["WriteTypeParametersInQualifiedName"] = 512] = "WriteTypeParametersInQualifiedName";
        NodeBuilderFlags[NodeBuilderFlags["MultilineObjectLiterals"] = 1024] = "MultilineObjectLiterals";
        NodeBuilderFlags[NodeBuilderFlags["WriteClassExpressionAsTypeLiteral"] = 2048] = "WriteClassExpressionAsTypeLiteral";
        NodeBuilderFlags[NodeBuilderFlags["UseTypeOfFunction"] = 4096] = "UseTypeOfFunction";
        NodeBuilderFlags[NodeBuilderFlags["OmitParameterModifiers"] = 8192] = "OmitParameterModifiers";
        NodeBuilderFlags[NodeBuilderFlags["UseAliasDefinedOutsideCurrentScope"] = 16384] = "UseAliasDefinedOutsideCurrentScope";
        // Error handling
        NodeBuilderFlags[NodeBuilderFlags["AllowThisInObjectLiteral"] = 32768] = "AllowThisInObjectLiteral";
        NodeBuilderFlags[NodeBuilderFlags["AllowQualifedNameInPlaceOfIdentifier"] = 65536] = "AllowQualifedNameInPlaceOfIdentifier";
        NodeBuilderFlags[NodeBuilderFlags["AllowAnonymousIdentifier"] = 131072] = "AllowAnonymousIdentifier";
        NodeBuilderFlags[NodeBuilderFlags["AllowEmptyUnionOrIntersection"] = 262144] = "AllowEmptyUnionOrIntersection";
        NodeBuilderFlags[NodeBuilderFlags["AllowEmptyTuple"] = 524288] = "AllowEmptyTuple";
        NodeBuilderFlags[NodeBuilderFlags["AllowUniqueESSymbolType"] = 1048576] = "AllowUniqueESSymbolType";
        NodeBuilderFlags[NodeBuilderFlags["AllowEmptyIndexInfoType"] = 2097152] = "AllowEmptyIndexInfoType";
        NodeBuilderFlags[NodeBuilderFlags["IgnoreErrors"] = 3112960] = "IgnoreErrors";
        // State
        NodeBuilderFlags[NodeBuilderFlags["InObjectTypeLiteral"] = 4194304] = "InObjectTypeLiteral";
        NodeBuilderFlags[NodeBuilderFlags["InTypeAlias"] = 8388608] = "InTypeAlias";
        NodeBuilderFlags[NodeBuilderFlags["InInitialEntityName"] = 16777216] = "InInitialEntityName";
        NodeBuilderFlags[NodeBuilderFlags["InReverseMappedType"] = 33554432] = "InReverseMappedType";
    })(NodeBuilderFlags = ts.NodeBuilderFlags || (ts.NodeBuilderFlags = {}));
    // Ensure the shared flags between this and `NodeBuilderFlags` stay in alignment
    var TypeFormatFlags;
    (function (TypeFormatFlags) {
        TypeFormatFlags[TypeFormatFlags["None"] = 0] = "None";
        TypeFormatFlags[TypeFormatFlags["NoTruncation"] = 1] = "NoTruncation";
        TypeFormatFlags[TypeFormatFlags["WriteArrayAsGenericType"] = 2] = "WriteArrayAsGenericType";
        // hole because there's a hole in node builder flags
        TypeFormatFlags[TypeFormatFlags["UseStructuralFallback"] = 8] = "UseStructuralFallback";
        // hole because there's a hole in node builder flags
        TypeFormatFlags[TypeFormatFlags["WriteTypeArgumentsOfSignature"] = 32] = "WriteTypeArgumentsOfSignature";
        TypeFormatFlags[TypeFormatFlags["UseFullyQualifiedType"] = 64] = "UseFullyQualifiedType";
        // hole because `UseOnlyExternalAliasing` is here in node builder flags, but functions which take old flags use `SymbolFormatFlags` instead
        TypeFormatFlags[TypeFormatFlags["SuppressAnyReturnType"] = 256] = "SuppressAnyReturnType";
        // hole because `WriteTypeParametersInQualifiedName` is here in node builder flags, but functions which take old flags use `SymbolFormatFlags` for this instead
        TypeFormatFlags[TypeFormatFlags["MultilineObjectLiterals"] = 1024] = "MultilineObjectLiterals";
        TypeFormatFlags[TypeFormatFlags["WriteClassExpressionAsTypeLiteral"] = 2048] = "WriteClassExpressionAsTypeLiteral";
        TypeFormatFlags[TypeFormatFlags["UseTypeOfFunction"] = 4096] = "UseTypeOfFunction";
        TypeFormatFlags[TypeFormatFlags["OmitParameterModifiers"] = 8192] = "OmitParameterModifiers";
        TypeFormatFlags[TypeFormatFlags["UseAliasDefinedOutsideCurrentScope"] = 16384] = "UseAliasDefinedOutsideCurrentScope";
        // even though `T` can't be accessed in the current scope.
        // Error Handling
        TypeFormatFlags[TypeFormatFlags["AllowUniqueESSymbolType"] = 1048576] = "AllowUniqueESSymbolType";
        // TypeFormatFlags exclusive
        TypeFormatFlags[TypeFormatFlags["AddUndefined"] = 131072] = "AddUndefined";
        TypeFormatFlags[TypeFormatFlags["WriteArrowStyleSignature"] = 262144] = "WriteArrowStyleSignature";
        // State
        TypeFormatFlags[TypeFormatFlags["InArrayType"] = 524288] = "InArrayType";
        TypeFormatFlags[TypeFormatFlags["InElementType"] = 2097152] = "InElementType";
        TypeFormatFlags[TypeFormatFlags["InFirstTypeArgument"] = 4194304] = "InFirstTypeArgument";
        TypeFormatFlags[TypeFormatFlags["InTypeAlias"] = 8388608] = "InTypeAlias";
        /** @deprecated */ TypeFormatFlags[TypeFormatFlags["WriteOwnNameForAnyLike"] = 0] = "WriteOwnNameForAnyLike";
        TypeFormatFlags[TypeFormatFlags["NodeBuilderFlagsMask"] = 9469291] = "NodeBuilderFlagsMask";
    })(TypeFormatFlags = ts.TypeFormatFlags || (ts.TypeFormatFlags = {}));
    var SymbolFormatFlags;
    (function (SymbolFormatFlags) {
        SymbolFormatFlags[SymbolFormatFlags["None"] = 0] = "None";
        // Write symbols's type argument if it is instantiated symbol
        // eg. class C<T> { p: T }   <-- Show p as C<T>.p here
        //     var a: C<number>;
        //     var p = a.p; <--- Here p is property of C<number> so show it as C<number>.p instead of just C.p
        SymbolFormatFlags[SymbolFormatFlags["WriteTypeParametersOrArguments"] = 1] = "WriteTypeParametersOrArguments";
        // Use only external alias information to get the symbol name in the given context
        // eg.  module m { export class c { } } import x = m.c;
        // When this flag is specified m.c will be used to refer to the class instead of alias symbol x
        SymbolFormatFlags[SymbolFormatFlags["UseOnlyExternalAliasing"] = 2] = "UseOnlyExternalAliasing";
        // Build symbol name using any nodes needed, instead of just components of an entity name
        SymbolFormatFlags[SymbolFormatFlags["AllowAnyNodeKind"] = 4] = "AllowAnyNodeKind";
        // Prefer aliases which are not directly visible
        SymbolFormatFlags[SymbolFormatFlags["UseAliasDefinedOutsideCurrentScope"] = 8] = "UseAliasDefinedOutsideCurrentScope";
    })(SymbolFormatFlags = ts.SymbolFormatFlags || (ts.SymbolFormatFlags = {}));
    /* @internal */
    var SymbolAccessibility;
    (function (SymbolAccessibility) {
        SymbolAccessibility[SymbolAccessibility["Accessible"] = 0] = "Accessible";
        SymbolAccessibility[SymbolAccessibility["NotAccessible"] = 1] = "NotAccessible";
        SymbolAccessibility[SymbolAccessibility["CannotBeNamed"] = 2] = "CannotBeNamed";
    })(SymbolAccessibility = ts.SymbolAccessibility || (ts.SymbolAccessibility = {}));
    /* @internal */
    var SyntheticSymbolKind;
    (function (SyntheticSymbolKind) {
        SyntheticSymbolKind[SyntheticSymbolKind["UnionOrIntersection"] = 0] = "UnionOrIntersection";
        SyntheticSymbolKind[SyntheticSymbolKind["Spread"] = 1] = "Spread";
    })(SyntheticSymbolKind = ts.SyntheticSymbolKind || (ts.SyntheticSymbolKind = {}));
    var TypePredicateKind;
    (function (TypePredicateKind) {
        TypePredicateKind[TypePredicateKind["This"] = 0] = "This";
        TypePredicateKind[TypePredicateKind["Identifier"] = 1] = "Identifier";
    })(TypePredicateKind = ts.TypePredicateKind || (ts.TypePredicateKind = {}));
    /** Indicates how to serialize the name for a TypeReferenceNode when emitting decorator metadata */
    /* @internal */
    var TypeReferenceSerializationKind;
    (function (TypeReferenceSerializationKind) {
        TypeReferenceSerializationKind[TypeReferenceSerializationKind["Unknown"] = 0] = "Unknown";
        // should be emitted using a safe fallback.
        TypeReferenceSerializationKind[TypeReferenceSerializationKind["TypeWithConstructSignatureAndValue"] = 1] = "TypeWithConstructSignatureAndValue";
        // function that can be reached at runtime (e.g. a `class`
        // declaration or a `var` declaration for the static side
        // of a type, such as the global `Promise` type in lib.d.ts).
        TypeReferenceSerializationKind[TypeReferenceSerializationKind["VoidNullableOrNeverType"] = 2] = "VoidNullableOrNeverType";
        TypeReferenceSerializationKind[TypeReferenceSerializationKind["NumberLikeType"] = 3] = "NumberLikeType";
        TypeReferenceSerializationKind[TypeReferenceSerializationKind["StringLikeType"] = 4] = "StringLikeType";
        TypeReferenceSerializationKind[TypeReferenceSerializationKind["BooleanType"] = 5] = "BooleanType";
        TypeReferenceSerializationKind[TypeReferenceSerializationKind["ArrayLikeType"] = 6] = "ArrayLikeType";
        TypeReferenceSerializationKind[TypeReferenceSerializationKind["ESSymbolType"] = 7] = "ESSymbolType";
        TypeReferenceSerializationKind[TypeReferenceSerializationKind["Promise"] = 8] = "Promise";
        TypeReferenceSerializationKind[TypeReferenceSerializationKind["TypeWithCallSignature"] = 9] = "TypeWithCallSignature";
        // with call signatures.
        TypeReferenceSerializationKind[TypeReferenceSerializationKind["ObjectType"] = 10] = "ObjectType";
    })(TypeReferenceSerializationKind = ts.TypeReferenceSerializationKind || (ts.TypeReferenceSerializationKind = {}));
    var SymbolFlags;
    (function (SymbolFlags) {
        SymbolFlags[SymbolFlags["None"] = 0] = "None";
        SymbolFlags[SymbolFlags["FunctionScopedVariable"] = 1] = "FunctionScopedVariable";
        SymbolFlags[SymbolFlags["BlockScopedVariable"] = 2] = "BlockScopedVariable";
        SymbolFlags[SymbolFlags["Property"] = 4] = "Property";
        SymbolFlags[SymbolFlags["EnumMember"] = 8] = "EnumMember";
        SymbolFlags[SymbolFlags["Function"] = 16] = "Function";
        SymbolFlags[SymbolFlags["Class"] = 32] = "Class";
        SymbolFlags[SymbolFlags["Interface"] = 64] = "Interface";
        SymbolFlags[SymbolFlags["ConstEnum"] = 128] = "ConstEnum";
        SymbolFlags[SymbolFlags["RegularEnum"] = 256] = "RegularEnum";
        SymbolFlags[SymbolFlags["ValueModule"] = 512] = "ValueModule";
        SymbolFlags[SymbolFlags["NamespaceModule"] = 1024] = "NamespaceModule";
        SymbolFlags[SymbolFlags["TypeLiteral"] = 2048] = "TypeLiteral";
        SymbolFlags[SymbolFlags["ObjectLiteral"] = 4096] = "ObjectLiteral";
        SymbolFlags[SymbolFlags["Method"] = 8192] = "Method";
        SymbolFlags[SymbolFlags["Constructor"] = 16384] = "Constructor";
        SymbolFlags[SymbolFlags["GetAccessor"] = 32768] = "GetAccessor";
        SymbolFlags[SymbolFlags["SetAccessor"] = 65536] = "SetAccessor";
        SymbolFlags[SymbolFlags["Signature"] = 131072] = "Signature";
        SymbolFlags[SymbolFlags["TypeParameter"] = 262144] = "TypeParameter";
        SymbolFlags[SymbolFlags["TypeAlias"] = 524288] = "TypeAlias";
        SymbolFlags[SymbolFlags["ExportValue"] = 1048576] = "ExportValue";
        SymbolFlags[SymbolFlags["Alias"] = 2097152] = "Alias";
        SymbolFlags[SymbolFlags["Prototype"] = 4194304] = "Prototype";
        SymbolFlags[SymbolFlags["ExportStar"] = 8388608] = "ExportStar";
        SymbolFlags[SymbolFlags["Optional"] = 16777216] = "Optional";
        SymbolFlags[SymbolFlags["Transient"] = 33554432] = "Transient";
        SymbolFlags[SymbolFlags["JSContainer"] = 67108864] = "JSContainer";
        /* @internal */
        SymbolFlags[SymbolFlags["All"] = 67108863] = "All";
        SymbolFlags[SymbolFlags["Enum"] = 384] = "Enum";
        SymbolFlags[SymbolFlags["Variable"] = 3] = "Variable";
        SymbolFlags[SymbolFlags["Value"] = 67216319] = "Value";
        SymbolFlags[SymbolFlags["Type"] = 67901928] = "Type";
        SymbolFlags[SymbolFlags["Namespace"] = 1920] = "Namespace";
        SymbolFlags[SymbolFlags["Module"] = 1536] = "Module";
        SymbolFlags[SymbolFlags["Accessor"] = 98304] = "Accessor";
        // Variables can be redeclared, but can not redeclare a block-scoped declaration with the
        // same name, or any other value that is not a variable, e.g. ValueModule or Class
        SymbolFlags[SymbolFlags["FunctionScopedVariableExcludes"] = 67216318] = "FunctionScopedVariableExcludes";
        // Block-scoped declarations are not allowed to be re-declared
        // they can not merge with anything in the value space
        SymbolFlags[SymbolFlags["BlockScopedVariableExcludes"] = 67216319] = "BlockScopedVariableExcludes";
        SymbolFlags[SymbolFlags["ParameterExcludes"] = 67216319] = "ParameterExcludes";
        SymbolFlags[SymbolFlags["PropertyExcludes"] = 0] = "PropertyExcludes";
        SymbolFlags[SymbolFlags["EnumMemberExcludes"] = 68008959] = "EnumMemberExcludes";
        SymbolFlags[SymbolFlags["FunctionExcludes"] = 67215791] = "FunctionExcludes";
        SymbolFlags[SymbolFlags["ClassExcludes"] = 68008383] = "ClassExcludes";
        SymbolFlags[SymbolFlags["InterfaceExcludes"] = 67901832] = "InterfaceExcludes";
        SymbolFlags[SymbolFlags["RegularEnumExcludes"] = 68008191] = "RegularEnumExcludes";
        SymbolFlags[SymbolFlags["ConstEnumExcludes"] = 68008831] = "ConstEnumExcludes";
        SymbolFlags[SymbolFlags["ValueModuleExcludes"] = 67215503] = "ValueModuleExcludes";
        SymbolFlags[SymbolFlags["NamespaceModuleExcludes"] = 0] = "NamespaceModuleExcludes";
        SymbolFlags[SymbolFlags["MethodExcludes"] = 67208127] = "MethodExcludes";
        SymbolFlags[SymbolFlags["GetAccessorExcludes"] = 67150783] = "GetAccessorExcludes";
        SymbolFlags[SymbolFlags["SetAccessorExcludes"] = 67183551] = "SetAccessorExcludes";
        SymbolFlags[SymbolFlags["TypeParameterExcludes"] = 67639784] = "TypeParameterExcludes";
        SymbolFlags[SymbolFlags["TypeAliasExcludes"] = 67901928] = "TypeAliasExcludes";
        SymbolFlags[SymbolFlags["AliasExcludes"] = 2097152] = "AliasExcludes";
        SymbolFlags[SymbolFlags["ModuleMember"] = 2623475] = "ModuleMember";
        SymbolFlags[SymbolFlags["ExportHasLocal"] = 944] = "ExportHasLocal";
        SymbolFlags[SymbolFlags["HasExports"] = 1955] = "HasExports";
        SymbolFlags[SymbolFlags["HasMembers"] = 6240] = "HasMembers";
        SymbolFlags[SymbolFlags["BlockScoped"] = 418] = "BlockScoped";
        SymbolFlags[SymbolFlags["PropertyOrAccessor"] = 98308] = "PropertyOrAccessor";
        SymbolFlags[SymbolFlags["ClassMember"] = 106500] = "ClassMember";
        /* @internal */
        // The set of things we consider semantically classifiable.  Used to speed up the LS during
        // classification.
        SymbolFlags[SymbolFlags["Classifiable"] = 2885600] = "Classifiable";
        /* @internal */
        SymbolFlags[SymbolFlags["LateBindingContainer"] = 6240] = "LateBindingContainer";
    })(SymbolFlags = ts.SymbolFlags || (ts.SymbolFlags = {}));
    /* @internal */
    var EnumKind;
    (function (EnumKind) {
        EnumKind[EnumKind["Numeric"] = 0] = "Numeric";
        EnumKind[EnumKind["Literal"] = 1] = "Literal"; // Literal enum (each member has a TypeFlags.EnumLiteral type)
    })(EnumKind = ts.EnumKind || (ts.EnumKind = {}));
    /* @internal */
    var CheckFlags;
    (function (CheckFlags) {
        CheckFlags[CheckFlags["Instantiated"] = 1] = "Instantiated";
        CheckFlags[CheckFlags["SyntheticProperty"] = 2] = "SyntheticProperty";
        CheckFlags[CheckFlags["SyntheticMethod"] = 4] = "SyntheticMethod";
        CheckFlags[CheckFlags["Readonly"] = 8] = "Readonly";
        CheckFlags[CheckFlags["Partial"] = 16] = "Partial";
        CheckFlags[CheckFlags["HasNonUniformType"] = 32] = "HasNonUniformType";
        CheckFlags[CheckFlags["ContainsPublic"] = 64] = "ContainsPublic";
        CheckFlags[CheckFlags["ContainsProtected"] = 128] = "ContainsProtected";
        CheckFlags[CheckFlags["ContainsPrivate"] = 256] = "ContainsPrivate";
        CheckFlags[CheckFlags["ContainsStatic"] = 512] = "ContainsStatic";
        CheckFlags[CheckFlags["Late"] = 1024] = "Late";
        CheckFlags[CheckFlags["ReverseMapped"] = 2048] = "ReverseMapped";
        CheckFlags[CheckFlags["Synthetic"] = 6] = "Synthetic";
    })(CheckFlags = ts.CheckFlags || (ts.CheckFlags = {}));
    var InternalSymbolName;
    (function (InternalSymbolName) {
        InternalSymbolName["Call"] = "__call";
        InternalSymbolName["Constructor"] = "__constructor";
        InternalSymbolName["New"] = "__new";
        InternalSymbolName["Index"] = "__index";
        InternalSymbolName["ExportStar"] = "__export";
        InternalSymbolName["Global"] = "__global";
        InternalSymbolName["Missing"] = "__missing";
        InternalSymbolName["Type"] = "__type";
        InternalSymbolName["Object"] = "__object";
        InternalSymbolName["JSXAttributes"] = "__jsxAttributes";
        InternalSymbolName["Class"] = "__class";
        InternalSymbolName["Function"] = "__function";
        InternalSymbolName["Computed"] = "__computed";
        InternalSymbolName["Resolving"] = "__resolving__";
        InternalSymbolName["ExportEquals"] = "export=";
        InternalSymbolName["Default"] = "default";
    })(InternalSymbolName = ts.InternalSymbolName || (ts.InternalSymbolName = {}));
    /* @internal */
    var NodeCheckFlags;
    (function (NodeCheckFlags) {
        NodeCheckFlags[NodeCheckFlags["TypeChecked"] = 1] = "TypeChecked";
        NodeCheckFlags[NodeCheckFlags["LexicalThis"] = 2] = "LexicalThis";
        NodeCheckFlags[NodeCheckFlags["CaptureThis"] = 4] = "CaptureThis";
        NodeCheckFlags[NodeCheckFlags["CaptureNewTarget"] = 8] = "CaptureNewTarget";
        NodeCheckFlags[NodeCheckFlags["SuperInstance"] = 256] = "SuperInstance";
        NodeCheckFlags[NodeCheckFlags["SuperStatic"] = 512] = "SuperStatic";
        NodeCheckFlags[NodeCheckFlags["ContextChecked"] = 1024] = "ContextChecked";
        NodeCheckFlags[NodeCheckFlags["AsyncMethodWithSuper"] = 2048] = "AsyncMethodWithSuper";
        NodeCheckFlags[NodeCheckFlags["AsyncMethodWithSuperBinding"] = 4096] = "AsyncMethodWithSuperBinding";
        NodeCheckFlags[NodeCheckFlags["CaptureArguments"] = 8192] = "CaptureArguments";
        NodeCheckFlags[NodeCheckFlags["EnumValuesComputed"] = 16384] = "EnumValuesComputed";
        NodeCheckFlags[NodeCheckFlags["LexicalModuleMergesWithClass"] = 32768] = "LexicalModuleMergesWithClass";
        NodeCheckFlags[NodeCheckFlags["LoopWithCapturedBlockScopedBinding"] = 65536] = "LoopWithCapturedBlockScopedBinding";
        NodeCheckFlags[NodeCheckFlags["CapturedBlockScopedBinding"] = 131072] = "CapturedBlockScopedBinding";
        NodeCheckFlags[NodeCheckFlags["BlockScopedBindingInLoop"] = 262144] = "BlockScopedBindingInLoop";
        NodeCheckFlags[NodeCheckFlags["ClassWithBodyScopedClassBinding"] = 524288] = "ClassWithBodyScopedClassBinding";
        NodeCheckFlags[NodeCheckFlags["BodyScopedClassBinding"] = 1048576] = "BodyScopedClassBinding";
        NodeCheckFlags[NodeCheckFlags["NeedsLoopOutParameter"] = 2097152] = "NeedsLoopOutParameter";
        NodeCheckFlags[NodeCheckFlags["AssignmentsMarked"] = 4194304] = "AssignmentsMarked";
        NodeCheckFlags[NodeCheckFlags["ClassWithConstructorReference"] = 8388608] = "ClassWithConstructorReference";
        NodeCheckFlags[NodeCheckFlags["ConstructorReferenceInClass"] = 16777216] = "ConstructorReferenceInClass";
    })(NodeCheckFlags = ts.NodeCheckFlags || (ts.NodeCheckFlags = {}));
    var TypeFlags;
    (function (TypeFlags) {
        TypeFlags[TypeFlags["Any"] = 1] = "Any";
        TypeFlags[TypeFlags["Unknown"] = 2] = "Unknown";
        TypeFlags[TypeFlags["String"] = 4] = "String";
        TypeFlags[TypeFlags["Number"] = 8] = "Number";
        TypeFlags[TypeFlags["Boolean"] = 16] = "Boolean";
        TypeFlags[TypeFlags["Enum"] = 32] = "Enum";
        TypeFlags[TypeFlags["StringLiteral"] = 64] = "StringLiteral";
        TypeFlags[TypeFlags["NumberLiteral"] = 128] = "NumberLiteral";
        TypeFlags[TypeFlags["BooleanLiteral"] = 256] = "BooleanLiteral";
        TypeFlags[TypeFlags["EnumLiteral"] = 512] = "EnumLiteral";
        TypeFlags[TypeFlags["ESSymbol"] = 1024] = "ESSymbol";
        TypeFlags[TypeFlags["UniqueESSymbol"] = 2048] = "UniqueESSymbol";
        TypeFlags[TypeFlags["Void"] = 4096] = "Void";
        TypeFlags[TypeFlags["Undefined"] = 8192] = "Undefined";
        TypeFlags[TypeFlags["Null"] = 16384] = "Null";
        TypeFlags[TypeFlags["Never"] = 32768] = "Never";
        TypeFlags[TypeFlags["TypeParameter"] = 65536] = "TypeParameter";
        TypeFlags[TypeFlags["Object"] = 131072] = "Object";
        TypeFlags[TypeFlags["Union"] = 262144] = "Union";
        TypeFlags[TypeFlags["Intersection"] = 524288] = "Intersection";
        TypeFlags[TypeFlags["Index"] = 1048576] = "Index";
        TypeFlags[TypeFlags["IndexedAccess"] = 2097152] = "IndexedAccess";
        TypeFlags[TypeFlags["Conditional"] = 4194304] = "Conditional";
        TypeFlags[TypeFlags["Substitution"] = 8388608] = "Substitution";
        TypeFlags[TypeFlags["NonPrimitive"] = 16777216] = "NonPrimitive";
        /* @internal */
        TypeFlags[TypeFlags["FreshLiteral"] = 33554432] = "FreshLiteral";
        /* @internal */
        TypeFlags[TypeFlags["UnionOfUnitTypes"] = 67108864] = "UnionOfUnitTypes";
        /* @internal */
        TypeFlags[TypeFlags["ContainsWideningType"] = 134217728] = "ContainsWideningType";
        /* @internal */
        TypeFlags[TypeFlags["ContainsObjectLiteral"] = 268435456] = "ContainsObjectLiteral";
        /* @internal */
        TypeFlags[TypeFlags["ContainsAnyFunctionType"] = 536870912] = "ContainsAnyFunctionType";
        /* @internal */
        TypeFlags[TypeFlags["AnyOrUnknown"] = 3] = "AnyOrUnknown";
        /* @internal */
        TypeFlags[TypeFlags["Nullable"] = 24576] = "Nullable";
        TypeFlags[TypeFlags["Literal"] = 448] = "Literal";
        TypeFlags[TypeFlags["Unit"] = 27072] = "Unit";
        TypeFlags[TypeFlags["StringOrNumberLiteral"] = 192] = "StringOrNumberLiteral";
        /* @internal */
        TypeFlags[TypeFlags["StringOrNumberLiteralOrUnique"] = 2240] = "StringOrNumberLiteralOrUnique";
        /* @internal */
        TypeFlags[TypeFlags["DefinitelyFalsy"] = 29120] = "DefinitelyFalsy";
        TypeFlags[TypeFlags["PossiblyFalsy"] = 29148] = "PossiblyFalsy";
        /* @internal */
        TypeFlags[TypeFlags["Intrinsic"] = 16839967] = "Intrinsic";
        /* @internal */
        TypeFlags[TypeFlags["Primitive"] = 32764] = "Primitive";
        TypeFlags[TypeFlags["StringLike"] = 68] = "StringLike";
        TypeFlags[TypeFlags["NumberLike"] = 168] = "NumberLike";
        TypeFlags[TypeFlags["BooleanLike"] = 272] = "BooleanLike";
        TypeFlags[TypeFlags["EnumLike"] = 544] = "EnumLike";
        TypeFlags[TypeFlags["ESSymbolLike"] = 3072] = "ESSymbolLike";
        TypeFlags[TypeFlags["VoidLike"] = 12288] = "VoidLike";
        /* @internal */
        TypeFlags[TypeFlags["DisjointDomains"] = 16809468] = "DisjointDomains";
        TypeFlags[TypeFlags["UnionOrIntersection"] = 786432] = "UnionOrIntersection";
        TypeFlags[TypeFlags["StructuredType"] = 917504] = "StructuredType";
        TypeFlags[TypeFlags["TypeVariable"] = 2162688] = "TypeVariable";
        TypeFlags[TypeFlags["InstantiableNonPrimitive"] = 14745600] = "InstantiableNonPrimitive";
        TypeFlags[TypeFlags["InstantiablePrimitive"] = 1048576] = "InstantiablePrimitive";
        TypeFlags[TypeFlags["Instantiable"] = 15794176] = "Instantiable";
        TypeFlags[TypeFlags["StructuredOrInstantiable"] = 16711680] = "StructuredOrInstantiable";
        // 'Narrowable' types are types where narrowing actually narrows.
        // This *should* be every type other than null, undefined, void, and never
        TypeFlags[TypeFlags["Narrowable"] = 33492479] = "Narrowable";
        TypeFlags[TypeFlags["NotUnionOrUnit"] = 16909315] = "NotUnionOrUnit";
        /* @internal */
        TypeFlags[TypeFlags["NotUnit"] = 16749629] = "NotUnit";
        /* @internal */
        TypeFlags[TypeFlags["RequiresWidening"] = 402653184] = "RequiresWidening";
        /* @internal */
        TypeFlags[TypeFlags["PropagatingFlags"] = 939524096] = "PropagatingFlags";
        // The following flags are used for different purposes during union and intersection type construction
        /* @internal */
        TypeFlags[TypeFlags["NonWideningType"] = 134217728] = "NonWideningType";
        /* @internal */
        TypeFlags[TypeFlags["Wildcard"] = 268435456] = "Wildcard";
        /* @internal */
        TypeFlags[TypeFlags["EmptyObject"] = 536870912] = "EmptyObject";
        /* @internal */
        TypeFlags[TypeFlags["ConstructionFlags"] = 939524096] = "ConstructionFlags";
        // The following flag is used for different purposes by maybeTypeOfKind
        /* @internal */
        TypeFlags[TypeFlags["GenericMappedType"] = 134217728] = "GenericMappedType";
    })(TypeFlags = ts.TypeFlags || (ts.TypeFlags = {}));
    var ObjectFlags;
    (function (ObjectFlags) {
        ObjectFlags[ObjectFlags["Class"] = 1] = "Class";
        ObjectFlags[ObjectFlags["Interface"] = 2] = "Interface";
        ObjectFlags[ObjectFlags["Reference"] = 4] = "Reference";
        ObjectFlags[ObjectFlags["Tuple"] = 8] = "Tuple";
        ObjectFlags[ObjectFlags["Anonymous"] = 16] = "Anonymous";
        ObjectFlags[ObjectFlags["Mapped"] = 32] = "Mapped";
        ObjectFlags[ObjectFlags["Instantiated"] = 64] = "Instantiated";
        ObjectFlags[ObjectFlags["ObjectLiteral"] = 128] = "ObjectLiteral";
        ObjectFlags[ObjectFlags["EvolvingArray"] = 256] = "EvolvingArray";
        ObjectFlags[ObjectFlags["ObjectLiteralPatternWithComputedProperties"] = 512] = "ObjectLiteralPatternWithComputedProperties";
        ObjectFlags[ObjectFlags["ContainsSpread"] = 1024] = "ContainsSpread";
        ObjectFlags[ObjectFlags["ReverseMapped"] = 2048] = "ReverseMapped";
        ObjectFlags[ObjectFlags["JsxAttributes"] = 4096] = "JsxAttributes";
        ObjectFlags[ObjectFlags["MarkerType"] = 8192] = "MarkerType";
        ObjectFlags[ObjectFlags["ClassOrInterface"] = 3] = "ClassOrInterface";
    })(ObjectFlags = ts.ObjectFlags || (ts.ObjectFlags = {}));
    /* @internal */
    var Variance;
    (function (Variance) {
        Variance[Variance["Invariant"] = 0] = "Invariant";
        Variance[Variance["Covariant"] = 1] = "Covariant";
        Variance[Variance["Contravariant"] = 2] = "Contravariant";
        Variance[Variance["Bivariant"] = 3] = "Bivariant";
        Variance[Variance["Independent"] = 4] = "Independent";
    })(Variance = ts.Variance || (ts.Variance = {}));
    var SignatureKind;
    (function (SignatureKind) {
        SignatureKind[SignatureKind["Call"] = 0] = "Call";
        SignatureKind[SignatureKind["Construct"] = 1] = "Construct";
    })(SignatureKind = ts.SignatureKind || (ts.SignatureKind = {}));
    var IndexKind;
    (function (IndexKind) {
        IndexKind[IndexKind["String"] = 0] = "String";
        IndexKind[IndexKind["Number"] = 1] = "Number";
    })(IndexKind = ts.IndexKind || (ts.IndexKind = {}));
    var InferencePriority;
    (function (InferencePriority) {
        InferencePriority[InferencePriority["NakedTypeVariable"] = 1] = "NakedTypeVariable";
        InferencePriority[InferencePriority["HomomorphicMappedType"] = 2] = "HomomorphicMappedType";
        InferencePriority[InferencePriority["MappedTypeConstraint"] = 4] = "MappedTypeConstraint";
        InferencePriority[InferencePriority["ReturnType"] = 8] = "ReturnType";
        InferencePriority[InferencePriority["LiteralKeyof"] = 16] = "LiteralKeyof";
        InferencePriority[InferencePriority["NoConstraints"] = 32] = "NoConstraints";
        InferencePriority[InferencePriority["AlwaysStrict"] = 64] = "AlwaysStrict";
        InferencePriority[InferencePriority["PriorityImpliesCombination"] = 28] = "PriorityImpliesCombination";
    })(InferencePriority = ts.InferencePriority || (ts.InferencePriority = {}));
    /* @internal */
    var InferenceFlags;
    (function (InferenceFlags) {
        InferenceFlags[InferenceFlags["None"] = 0] = "None";
        InferenceFlags[InferenceFlags["InferUnionTypes"] = 1] = "InferUnionTypes";
        InferenceFlags[InferenceFlags["NoDefault"] = 2] = "NoDefault";
        InferenceFlags[InferenceFlags["AnyDefault"] = 4] = "AnyDefault";
    })(InferenceFlags = ts.InferenceFlags || (ts.InferenceFlags = {}));
    /**
     * Ternary values are defined such that
     * x & y is False if either x or y is False.
     * x & y is Maybe if either x or y is Maybe, but neither x or y is False.
     * x & y is True if both x and y are True.
     * x | y is False if both x and y are False.
     * x | y is Maybe if either x or y is Maybe, but neither x or y is True.
     * x | y is True if either x or y is True.
     */
    /* @internal */
    var Ternary;
    (function (Ternary) {
        Ternary[Ternary["False"] = 0] = "False";
        Ternary[Ternary["Maybe"] = 1] = "Maybe";
        Ternary[Ternary["True"] = -1] = "True";
    })(Ternary = ts.Ternary || (ts.Ternary = {}));
    /* @internal */
    var SpecialPropertyAssignmentKind;
    (function (SpecialPropertyAssignmentKind) {
        SpecialPropertyAssignmentKind[SpecialPropertyAssignmentKind["None"] = 0] = "None";
        /// exports.name = expr
        SpecialPropertyAssignmentKind[SpecialPropertyAssignmentKind["ExportsProperty"] = 1] = "ExportsProperty";
        /// module.exports = expr
        SpecialPropertyAssignmentKind[SpecialPropertyAssignmentKind["ModuleExports"] = 2] = "ModuleExports";
        /// className.prototype.name = expr
        SpecialPropertyAssignmentKind[SpecialPropertyAssignmentKind["PrototypeProperty"] = 3] = "PrototypeProperty";
        /// this.name = expr
        SpecialPropertyAssignmentKind[SpecialPropertyAssignmentKind["ThisProperty"] = 4] = "ThisProperty";
        // F.name = expr
        SpecialPropertyAssignmentKind[SpecialPropertyAssignmentKind["Property"] = 5] = "Property";
        // F.prototype = { ... }
        SpecialPropertyAssignmentKind[SpecialPropertyAssignmentKind["Prototype"] = 6] = "Prototype";
    })(SpecialPropertyAssignmentKind = ts.SpecialPropertyAssignmentKind || (ts.SpecialPropertyAssignmentKind = {}));
    var DiagnosticCategory;
    (function (DiagnosticCategory) {
        DiagnosticCategory[DiagnosticCategory["Warning"] = 0] = "Warning";
        DiagnosticCategory[DiagnosticCategory["Error"] = 1] = "Error";
        DiagnosticCategory[DiagnosticCategory["Suggestion"] = 2] = "Suggestion";
        DiagnosticCategory[DiagnosticCategory["Message"] = 3] = "Message";
    })(DiagnosticCategory = ts.DiagnosticCategory || (ts.DiagnosticCategory = {}));
    /* @internal */
    function diagnosticCategoryName(d, lowerCase) {
        if (lowerCase === void 0) { lowerCase = true; }
        var name = DiagnosticCategory[d.category];
        return lowerCase ? name.toLowerCase() : name;
    }
    ts.diagnosticCategoryName = diagnosticCategoryName;
    var ModuleResolutionKind;
    (function (ModuleResolutionKind) {
        ModuleResolutionKind[ModuleResolutionKind["Classic"] = 1] = "Classic";
        ModuleResolutionKind[ModuleResolutionKind["NodeJs"] = 2] = "NodeJs";
    })(ModuleResolutionKind = ts.ModuleResolutionKind || (ts.ModuleResolutionKind = {}));
    var ModuleKind;
    (function (ModuleKind) {
        ModuleKind[ModuleKind["None"] = 0] = "None";
        ModuleKind[ModuleKind["CommonJS"] = 1] = "CommonJS";
        ModuleKind[ModuleKind["AMD"] = 2] = "AMD";
        ModuleKind[ModuleKind["UMD"] = 3] = "UMD";
        ModuleKind[ModuleKind["System"] = 4] = "System";
        ModuleKind[ModuleKind["ES2015"] = 5] = "ES2015";
        ModuleKind[ModuleKind["ESNext"] = 6] = "ESNext";
    })(ModuleKind = ts.ModuleKind || (ts.ModuleKind = {}));
    var JsxEmit;
    (function (JsxEmit) {
        JsxEmit[JsxEmit["None"] = 0] = "None";
        JsxEmit[JsxEmit["Preserve"] = 1] = "Preserve";
        JsxEmit[JsxEmit["React"] = 2] = "React";
        JsxEmit[JsxEmit["ReactNative"] = 3] = "ReactNative";
    })(JsxEmit = ts.JsxEmit || (ts.JsxEmit = {}));
    var NewLineKind;
    (function (NewLineKind) {
        NewLineKind[NewLineKind["CarriageReturnLineFeed"] = 0] = "CarriageReturnLineFeed";
        NewLineKind[NewLineKind["LineFeed"] = 1] = "LineFeed";
    })(NewLineKind = ts.NewLineKind || (ts.NewLineKind = {}));
    var ScriptKind;
    (function (ScriptKind) {
        ScriptKind[ScriptKind["Unknown"] = 0] = "Unknown";
        ScriptKind[ScriptKind["JS"] = 1] = "JS";
        ScriptKind[ScriptKind["JSX"] = 2] = "JSX";
        ScriptKind[ScriptKind["TS"] = 3] = "TS";
        ScriptKind[ScriptKind["TSX"] = 4] = "TSX";
        ScriptKind[ScriptKind["External"] = 5] = "External";
        ScriptKind[ScriptKind["JSON"] = 6] = "JSON";
        /**
         * Used on extensions that doesn't define the ScriptKind but the content defines it.
         * Deferred extensions are going to be included in all project contexts.
         */
        ScriptKind[ScriptKind["Deferred"] = 7] = "Deferred";
    })(ScriptKind = ts.ScriptKind || (ts.ScriptKind = {}));
    var ScriptTarget;
    (function (ScriptTarget) {
        ScriptTarget[ScriptTarget["ES3"] = 0] = "ES3";
        ScriptTarget[ScriptTarget["ES5"] = 1] = "ES5";
        ScriptTarget[ScriptTarget["ES2015"] = 2] = "ES2015";
        ScriptTarget[ScriptTarget["ES2016"] = 3] = "ES2016";
        ScriptTarget[ScriptTarget["ES2017"] = 4] = "ES2017";
        ScriptTarget[ScriptTarget["ES2018"] = 5] = "ES2018";
        ScriptTarget[ScriptTarget["ESNext"] = 6] = "ESNext";
        ScriptTarget[ScriptTarget["JSON"] = 100] = "JSON";
        ScriptTarget[ScriptTarget["Latest"] = 6] = "Latest";
    })(ScriptTarget = ts.ScriptTarget || (ts.ScriptTarget = {}));
    var LanguageVariant;
    (function (LanguageVariant) {
        LanguageVariant[LanguageVariant["Standard"] = 0] = "Standard";
        LanguageVariant[LanguageVariant["JSX"] = 1] = "JSX";
    })(LanguageVariant = ts.LanguageVariant || (ts.LanguageVariant = {}));
    var WatchDirectoryFlags;
    (function (WatchDirectoryFlags) {
        WatchDirectoryFlags[WatchDirectoryFlags["None"] = 0] = "None";
        WatchDirectoryFlags[WatchDirectoryFlags["Recursive"] = 1] = "Recursive";
    })(WatchDirectoryFlags = ts.WatchDirectoryFlags || (ts.WatchDirectoryFlags = {}));
    /* @internal */
    var CharacterCodes;
    (function (CharacterCodes) {
        CharacterCodes[CharacterCodes["nullCharacter"] = 0] = "nullCharacter";
        CharacterCodes[CharacterCodes["maxAsciiCharacter"] = 127] = "maxAsciiCharacter";
        CharacterCodes[CharacterCodes["lineFeed"] = 10] = "lineFeed";
        CharacterCodes[CharacterCodes["carriageReturn"] = 13] = "carriageReturn";
        CharacterCodes[CharacterCodes["lineSeparator"] = 8232] = "lineSeparator";
        CharacterCodes[CharacterCodes["paragraphSeparator"] = 8233] = "paragraphSeparator";
        CharacterCodes[CharacterCodes["nextLine"] = 133] = "nextLine";
        // Unicode 3.0 space characters
        CharacterCodes[CharacterCodes["space"] = 32] = "space";
        CharacterCodes[CharacterCodes["nonBreakingSpace"] = 160] = "nonBreakingSpace";
        CharacterCodes[CharacterCodes["enQuad"] = 8192] = "enQuad";
        CharacterCodes[CharacterCodes["emQuad"] = 8193] = "emQuad";
        CharacterCodes[CharacterCodes["enSpace"] = 8194] = "enSpace";
        CharacterCodes[CharacterCodes["emSpace"] = 8195] = "emSpace";
        CharacterCodes[CharacterCodes["threePerEmSpace"] = 8196] = "threePerEmSpace";
        CharacterCodes[CharacterCodes["fourPerEmSpace"] = 8197] = "fourPerEmSpace";
        CharacterCodes[CharacterCodes["sixPerEmSpace"] = 8198] = "sixPerEmSpace";
        CharacterCodes[CharacterCodes["figureSpace"] = 8199] = "figureSpace";
        CharacterCodes[CharacterCodes["punctuationSpace"] = 8200] = "punctuationSpace";
        CharacterCodes[CharacterCodes["thinSpace"] = 8201] = "thinSpace";
        CharacterCodes[CharacterCodes["hairSpace"] = 8202] = "hairSpace";
        CharacterCodes[CharacterCodes["zeroWidthSpace"] = 8203] = "zeroWidthSpace";
        CharacterCodes[CharacterCodes["narrowNoBreakSpace"] = 8239] = "narrowNoBreakSpace";
        CharacterCodes[CharacterCodes["ideographicSpace"] = 12288] = "ideographicSpace";
        CharacterCodes[CharacterCodes["mathematicalSpace"] = 8287] = "mathematicalSpace";
        CharacterCodes[CharacterCodes["ogham"] = 5760] = "ogham";
        CharacterCodes[CharacterCodes["_"] = 95] = "_";
        CharacterCodes[CharacterCodes["$"] = 36] = "$";
        CharacterCodes[CharacterCodes["_0"] = 48] = "_0";
        CharacterCodes[CharacterCodes["_1"] = 49] = "_1";
        CharacterCodes[CharacterCodes["_2"] = 50] = "_2";
        CharacterCodes[CharacterCodes["_3"] = 51] = "_3";
        CharacterCodes[CharacterCodes["_4"] = 52] = "_4";
        CharacterCodes[CharacterCodes["_5"] = 53] = "_5";
        CharacterCodes[CharacterCodes["_6"] = 54] = "_6";
        CharacterCodes[CharacterCodes["_7"] = 55] = "_7";
        CharacterCodes[CharacterCodes["_8"] = 56] = "_8";
        CharacterCodes[CharacterCodes["_9"] = 57] = "_9";
        CharacterCodes[CharacterCodes["a"] = 97] = "a";
        CharacterCodes[CharacterCodes["b"] = 98] = "b";
        CharacterCodes[CharacterCodes["c"] = 99] = "c";
        CharacterCodes[CharacterCodes["d"] = 100] = "d";
        CharacterCodes[CharacterCodes["e"] = 101] = "e";
        CharacterCodes[CharacterCodes["f"] = 102] = "f";
        CharacterCodes[CharacterCodes["g"] = 103] = "g";
        CharacterCodes[CharacterCodes["h"] = 104] = "h";
        CharacterCodes[CharacterCodes["i"] = 105] = "i";
        CharacterCodes[CharacterCodes["j"] = 106] = "j";
        CharacterCodes[CharacterCodes["k"] = 107] = "k";
        CharacterCodes[CharacterCodes["l"] = 108] = "l";
        CharacterCodes[CharacterCodes["m"] = 109] = "m";
        CharacterCodes[CharacterCodes["n"] = 110] = "n";
        CharacterCodes[CharacterCodes["o"] = 111] = "o";
        CharacterCodes[CharacterCodes["p"] = 112] = "p";
        CharacterCodes[CharacterCodes["q"] = 113] = "q";
        CharacterCodes[CharacterCodes["r"] = 114] = "r";
        CharacterCodes[CharacterCodes["s"] = 115] = "s";
        CharacterCodes[CharacterCodes["t"] = 116] = "t";
        CharacterCodes[CharacterCodes["u"] = 117] = "u";
        CharacterCodes[CharacterCodes["v"] = 118] = "v";
        CharacterCodes[CharacterCodes["w"] = 119] = "w";
        CharacterCodes[CharacterCodes["x"] = 120] = "x";
        CharacterCodes[CharacterCodes["y"] = 121] = "y";
        CharacterCodes[CharacterCodes["z"] = 122] = "z";
        CharacterCodes[CharacterCodes["A"] = 65] = "A";
        CharacterCodes[CharacterCodes["B"] = 66] = "B";
        CharacterCodes[CharacterCodes["C"] = 67] = "C";
        CharacterCodes[CharacterCodes["D"] = 68] = "D";
        CharacterCodes[CharacterCodes["E"] = 69] = "E";
        CharacterCodes[CharacterCodes["F"] = 70] = "F";
        CharacterCodes[CharacterCodes["G"] = 71] = "G";
        CharacterCodes[CharacterCodes["H"] = 72] = "H";
        CharacterCodes[CharacterCodes["I"] = 73] = "I";
        CharacterCodes[CharacterCodes["J"] = 74] = "J";
        CharacterCodes[CharacterCodes["K"] = 75] = "K";
        CharacterCodes[CharacterCodes["L"] = 76] = "L";
        CharacterCodes[CharacterCodes["M"] = 77] = "M";
        CharacterCodes[CharacterCodes["N"] = 78] = "N";
        CharacterCodes[CharacterCodes["O"] = 79] = "O";
        CharacterCodes[CharacterCodes["P"] = 80] = "P";
        CharacterCodes[CharacterCodes["Q"] = 81] = "Q";
        CharacterCodes[CharacterCodes["R"] = 82] = "R";
        CharacterCodes[CharacterCodes["S"] = 83] = "S";
        CharacterCodes[CharacterCodes["T"] = 84] = "T";
        CharacterCodes[CharacterCodes["U"] = 85] = "U";
        CharacterCodes[CharacterCodes["V"] = 86] = "V";
        CharacterCodes[CharacterCodes["W"] = 87] = "W";
        CharacterCodes[CharacterCodes["X"] = 88] = "X";
        CharacterCodes[CharacterCodes["Y"] = 89] = "Y";
        CharacterCodes[CharacterCodes["Z"] = 90] = "Z";
        CharacterCodes[CharacterCodes["ampersand"] = 38] = "ampersand";
        CharacterCodes[CharacterCodes["asterisk"] = 42] = "asterisk";
        CharacterCodes[CharacterCodes["at"] = 64] = "at";
        CharacterCodes[CharacterCodes["backslash"] = 92] = "backslash";
        CharacterCodes[CharacterCodes["backtick"] = 96] = "backtick";
        CharacterCodes[CharacterCodes["bar"] = 124] = "bar";
        CharacterCodes[CharacterCodes["caret"] = 94] = "caret";
        CharacterCodes[CharacterCodes["closeBrace"] = 125] = "closeBrace";
        CharacterCodes[CharacterCodes["closeBracket"] = 93] = "closeBracket";
        CharacterCodes[CharacterCodes["closeParen"] = 41] = "closeParen";
        CharacterCodes[CharacterCodes["colon"] = 58] = "colon";
        CharacterCodes[CharacterCodes["comma"] = 44] = "comma";
        CharacterCodes[CharacterCodes["dot"] = 46] = "dot";
        CharacterCodes[CharacterCodes["doubleQuote"] = 34] = "doubleQuote";
        CharacterCodes[CharacterCodes["equals"] = 61] = "equals";
        CharacterCodes[CharacterCodes["exclamation"] = 33] = "exclamation";
        CharacterCodes[CharacterCodes["greaterThan"] = 62] = "greaterThan";
        CharacterCodes[CharacterCodes["hash"] = 35] = "hash";
        CharacterCodes[CharacterCodes["lessThan"] = 60] = "lessThan";
        CharacterCodes[CharacterCodes["minus"] = 45] = "minus";
        CharacterCodes[CharacterCodes["openBrace"] = 123] = "openBrace";
        CharacterCodes[CharacterCodes["openBracket"] = 91] = "openBracket";
        CharacterCodes[CharacterCodes["openParen"] = 40] = "openParen";
        CharacterCodes[CharacterCodes["percent"] = 37] = "percent";
        CharacterCodes[CharacterCodes["plus"] = 43] = "plus";
        CharacterCodes[CharacterCodes["question"] = 63] = "question";
        CharacterCodes[CharacterCodes["semicolon"] = 59] = "semicolon";
        CharacterCodes[CharacterCodes["singleQuote"] = 39] = "singleQuote";
        CharacterCodes[CharacterCodes["slash"] = 47] = "slash";
        CharacterCodes[CharacterCodes["tilde"] = 126] = "tilde";
        CharacterCodes[CharacterCodes["backspace"] = 8] = "backspace";
        CharacterCodes[CharacterCodes["formFeed"] = 12] = "formFeed";
        CharacterCodes[CharacterCodes["byteOrderMark"] = 65279] = "byteOrderMark";
        CharacterCodes[CharacterCodes["tab"] = 9] = "tab";
        CharacterCodes[CharacterCodes["verticalTab"] = 11] = "verticalTab";
    })(CharacterCodes = ts.CharacterCodes || (ts.CharacterCodes = {}));
    var Extension;
    (function (Extension) {
        Extension["Ts"] = ".ts";
        Extension["Tsx"] = ".tsx";
        Extension["Dts"] = ".d.ts";
        Extension["Js"] = ".js";
        Extension["Jsx"] = ".jsx";
        Extension["Json"] = ".json";
    })(Extension = ts.Extension || (ts.Extension = {}));
    /* @internal */
    var TransformFlags;
    (function (TransformFlags) {
        TransformFlags[TransformFlags["None"] = 0] = "None";
        // Facts
        // - Flags used to indicate that a node or subtree contains syntax that requires transformation.
        TransformFlags[TransformFlags["TypeScript"] = 1] = "TypeScript";
        TransformFlags[TransformFlags["ContainsTypeScript"] = 2] = "ContainsTypeScript";
        TransformFlags[TransformFlags["ContainsJsx"] = 4] = "ContainsJsx";
        TransformFlags[TransformFlags["ContainsESNext"] = 8] = "ContainsESNext";
        TransformFlags[TransformFlags["ContainsES2017"] = 16] = "ContainsES2017";
        TransformFlags[TransformFlags["ContainsES2016"] = 32] = "ContainsES2016";
        TransformFlags[TransformFlags["ES2015"] = 64] = "ES2015";
        TransformFlags[TransformFlags["ContainsES2015"] = 128] = "ContainsES2015";
        TransformFlags[TransformFlags["Generator"] = 256] = "Generator";
        TransformFlags[TransformFlags["ContainsGenerator"] = 512] = "ContainsGenerator";
        TransformFlags[TransformFlags["DestructuringAssignment"] = 1024] = "DestructuringAssignment";
        TransformFlags[TransformFlags["ContainsDestructuringAssignment"] = 2048] = "ContainsDestructuringAssignment";
        // Markers
        // - Flags used to indicate that a subtree contains a specific transformation.
        TransformFlags[TransformFlags["ContainsDecorators"] = 4096] = "ContainsDecorators";
        TransformFlags[TransformFlags["ContainsPropertyInitializer"] = 8192] = "ContainsPropertyInitializer";
        TransformFlags[TransformFlags["ContainsLexicalThis"] = 16384] = "ContainsLexicalThis";
        TransformFlags[TransformFlags["ContainsCapturedLexicalThis"] = 32768] = "ContainsCapturedLexicalThis";
        TransformFlags[TransformFlags["ContainsLexicalThisInComputedPropertyName"] = 65536] = "ContainsLexicalThisInComputedPropertyName";
        TransformFlags[TransformFlags["ContainsDefaultValueAssignments"] = 131072] = "ContainsDefaultValueAssignments";
        TransformFlags[TransformFlags["ContainsParameterPropertyAssignments"] = 262144] = "ContainsParameterPropertyAssignments";
        TransformFlags[TransformFlags["ContainsSpread"] = 524288] = "ContainsSpread";
        TransformFlags[TransformFlags["ContainsObjectSpread"] = 1048576] = "ContainsObjectSpread";
        TransformFlags[TransformFlags["ContainsRest"] = 524288] = "ContainsRest";
        TransformFlags[TransformFlags["ContainsObjectRest"] = 1048576] = "ContainsObjectRest";
        TransformFlags[TransformFlags["ContainsComputedPropertyName"] = 2097152] = "ContainsComputedPropertyName";
        TransformFlags[TransformFlags["ContainsBlockScopedBinding"] = 4194304] = "ContainsBlockScopedBinding";
        TransformFlags[TransformFlags["ContainsBindingPattern"] = 8388608] = "ContainsBindingPattern";
        TransformFlags[TransformFlags["ContainsYield"] = 16777216] = "ContainsYield";
        TransformFlags[TransformFlags["ContainsHoistedDeclarationOrCompletion"] = 33554432] = "ContainsHoistedDeclarationOrCompletion";
        TransformFlags[TransformFlags["ContainsDynamicImport"] = 67108864] = "ContainsDynamicImport";
        TransformFlags[TransformFlags["Super"] = 134217728] = "Super";
        TransformFlags[TransformFlags["ContainsSuper"] = 268435456] = "ContainsSuper";
        // Please leave this as 1 << 29.
        // It is the maximum bit we can set before we outgrow the size of a v8 small integer (SMI) on an x86 system.
        // It is a good reminder of how much room we have left
        TransformFlags[TransformFlags["HasComputedFlags"] = 536870912] = "HasComputedFlags";
        // Assertions
        // - Bitmasks that are used to assert facts about the syntax of a node and its subtree.
        TransformFlags[TransformFlags["AssertTypeScript"] = 3] = "AssertTypeScript";
        TransformFlags[TransformFlags["AssertJsx"] = 4] = "AssertJsx";
        TransformFlags[TransformFlags["AssertESNext"] = 8] = "AssertESNext";
        TransformFlags[TransformFlags["AssertES2017"] = 16] = "AssertES2017";
        TransformFlags[TransformFlags["AssertES2016"] = 32] = "AssertES2016";
        TransformFlags[TransformFlags["AssertES2015"] = 192] = "AssertES2015";
        TransformFlags[TransformFlags["AssertGenerator"] = 768] = "AssertGenerator";
        TransformFlags[TransformFlags["AssertDestructuringAssignment"] = 3072] = "AssertDestructuringAssignment";
        // Scope Exclusions
        // - Bitmasks that exclude flags from propagating out of a specific context
        //   into the subtree flags of their container.
        TransformFlags[TransformFlags["OuterExpressionExcludes"] = 536872257] = "OuterExpressionExcludes";
        TransformFlags[TransformFlags["PropertyAccessExcludes"] = 671089985] = "PropertyAccessExcludes";
        TransformFlags[TransformFlags["NodeExcludes"] = 939525441] = "NodeExcludes";
        TransformFlags[TransformFlags["ArrowFunctionExcludes"] = 1003902273] = "ArrowFunctionExcludes";
        TransformFlags[TransformFlags["FunctionExcludes"] = 1003935041] = "FunctionExcludes";
        TransformFlags[TransformFlags["ConstructorExcludes"] = 1003668801] = "ConstructorExcludes";
        TransformFlags[TransformFlags["MethodOrAccessorExcludes"] = 1003668801] = "MethodOrAccessorExcludes";
        TransformFlags[TransformFlags["ClassExcludes"] = 942011713] = "ClassExcludes";
        TransformFlags[TransformFlags["ModuleExcludes"] = 977327425] = "ModuleExcludes";
        TransformFlags[TransformFlags["TypeExcludes"] = -3] = "TypeExcludes";
        TransformFlags[TransformFlags["ObjectLiteralExcludes"] = 942740801] = "ObjectLiteralExcludes";
        TransformFlags[TransformFlags["ArrayLiteralOrCallOrNewExcludes"] = 940049729] = "ArrayLiteralOrCallOrNewExcludes";
        TransformFlags[TransformFlags["VariableDeclarationListExcludes"] = 948962625] = "VariableDeclarationListExcludes";
        TransformFlags[TransformFlags["ParameterExcludes"] = 939525441] = "ParameterExcludes";
        TransformFlags[TransformFlags["CatchClauseExcludes"] = 940574017] = "CatchClauseExcludes";
        TransformFlags[TransformFlags["BindingPatternExcludes"] = 940049729] = "BindingPatternExcludes";
        // Masks
        // - Additional bitmasks
        TransformFlags[TransformFlags["TypeScriptClassSyntaxMask"] = 274432] = "TypeScriptClassSyntaxMask";
        TransformFlags[TransformFlags["ES2015FunctionSyntaxMask"] = 163840] = "ES2015FunctionSyntaxMask";
    })(TransformFlags = ts.TransformFlags || (ts.TransformFlags = {}));
    var EmitFlags;
    (function (EmitFlags) {
        EmitFlags[EmitFlags["None"] = 0] = "None";
        EmitFlags[EmitFlags["SingleLine"] = 1] = "SingleLine";
        EmitFlags[EmitFlags["AdviseOnEmitNode"] = 2] = "AdviseOnEmitNode";
        EmitFlags[EmitFlags["NoSubstitution"] = 4] = "NoSubstitution";
        EmitFlags[EmitFlags["CapturesThis"] = 8] = "CapturesThis";
        EmitFlags[EmitFlags["NoLeadingSourceMap"] = 16] = "NoLeadingSourceMap";
        EmitFlags[EmitFlags["NoTrailingSourceMap"] = 32] = "NoTrailingSourceMap";
        EmitFlags[EmitFlags["NoSourceMap"] = 48] = "NoSourceMap";
        EmitFlags[EmitFlags["NoNestedSourceMaps"] = 64] = "NoNestedSourceMaps";
        EmitFlags[EmitFlags["NoTokenLeadingSourceMaps"] = 128] = "NoTokenLeadingSourceMaps";
        EmitFlags[EmitFlags["NoTokenTrailingSourceMaps"] = 256] = "NoTokenTrailingSourceMaps";
        EmitFlags[EmitFlags["NoTokenSourceMaps"] = 384] = "NoTokenSourceMaps";
        EmitFlags[EmitFlags["NoLeadingComments"] = 512] = "NoLeadingComments";
        EmitFlags[EmitFlags["NoTrailingComments"] = 1024] = "NoTrailingComments";
        EmitFlags[EmitFlags["NoComments"] = 1536] = "NoComments";
        EmitFlags[EmitFlags["NoNestedComments"] = 2048] = "NoNestedComments";
        EmitFlags[EmitFlags["HelperName"] = 4096] = "HelperName";
        EmitFlags[EmitFlags["ExportName"] = 8192] = "ExportName";
        EmitFlags[EmitFlags["LocalName"] = 16384] = "LocalName";
        EmitFlags[EmitFlags["InternalName"] = 32768] = "InternalName";
        EmitFlags[EmitFlags["Indented"] = 65536] = "Indented";
        EmitFlags[EmitFlags["NoIndentation"] = 131072] = "NoIndentation";
        EmitFlags[EmitFlags["AsyncFunctionBody"] = 262144] = "AsyncFunctionBody";
        EmitFlags[EmitFlags["ReuseTempVariableScope"] = 524288] = "ReuseTempVariableScope";
        EmitFlags[EmitFlags["CustomPrologue"] = 1048576] = "CustomPrologue";
        EmitFlags[EmitFlags["NoHoisting"] = 2097152] = "NoHoisting";
        EmitFlags[EmitFlags["HasEndOfDeclarationMarker"] = 4194304] = "HasEndOfDeclarationMarker";
        EmitFlags[EmitFlags["Iterator"] = 8388608] = "Iterator";
        EmitFlags[EmitFlags["NoAsciiEscaping"] = 16777216] = "NoAsciiEscaping";
        /*@internal*/ EmitFlags[EmitFlags["TypeScriptClassWrapper"] = 33554432] = "TypeScriptClassWrapper";
        /*@internal*/ EmitFlags[EmitFlags["NeverApplyImportHelper"] = 67108864] = "NeverApplyImportHelper";
    })(EmitFlags = ts.EmitFlags || (ts.EmitFlags = {}));
    /**
     * Used by the checker, this enum keeps track of external emit helpers that should be type
     * checked.
     */
    /* @internal */
    var ExternalEmitHelpers;
    (function (ExternalEmitHelpers) {
        ExternalEmitHelpers[ExternalEmitHelpers["Extends"] = 1] = "Extends";
        ExternalEmitHelpers[ExternalEmitHelpers["Assign"] = 2] = "Assign";
        ExternalEmitHelpers[ExternalEmitHelpers["Rest"] = 4] = "Rest";
        ExternalEmitHelpers[ExternalEmitHelpers["Decorate"] = 8] = "Decorate";
        ExternalEmitHelpers[ExternalEmitHelpers["Metadata"] = 16] = "Metadata";
        ExternalEmitHelpers[ExternalEmitHelpers["Param"] = 32] = "Param";
        ExternalEmitHelpers[ExternalEmitHelpers["Awaiter"] = 64] = "Awaiter";
        ExternalEmitHelpers[ExternalEmitHelpers["Generator"] = 128] = "Generator";
        ExternalEmitHelpers[ExternalEmitHelpers["Values"] = 256] = "Values";
        ExternalEmitHelpers[ExternalEmitHelpers["Read"] = 512] = "Read";
        ExternalEmitHelpers[ExternalEmitHelpers["Spread"] = 1024] = "Spread";
        ExternalEmitHelpers[ExternalEmitHelpers["Await"] = 2048] = "Await";
        ExternalEmitHelpers[ExternalEmitHelpers["AsyncGenerator"] = 4096] = "AsyncGenerator";
        ExternalEmitHelpers[ExternalEmitHelpers["AsyncDelegator"] = 8192] = "AsyncDelegator";
        ExternalEmitHelpers[ExternalEmitHelpers["AsyncValues"] = 16384] = "AsyncValues";
        ExternalEmitHelpers[ExternalEmitHelpers["ExportStar"] = 32768] = "ExportStar";
        ExternalEmitHelpers[ExternalEmitHelpers["MakeTemplateObject"] = 65536] = "MakeTemplateObject";
        ExternalEmitHelpers[ExternalEmitHelpers["FirstEmitHelper"] = 1] = "FirstEmitHelper";
        ExternalEmitHelpers[ExternalEmitHelpers["LastEmitHelper"] = 65536] = "LastEmitHelper";
        // Helpers included by ES2015 for..of
        ExternalEmitHelpers[ExternalEmitHelpers["ForOfIncludes"] = 256] = "ForOfIncludes";
        // Helpers included by ES2017 for..await..of
        ExternalEmitHelpers[ExternalEmitHelpers["ForAwaitOfIncludes"] = 16384] = "ForAwaitOfIncludes";
        // Helpers included by ES2017 async generators
        ExternalEmitHelpers[ExternalEmitHelpers["AsyncGeneratorIncludes"] = 6144] = "AsyncGeneratorIncludes";
        // Helpers included by yield* in ES2017 async generators
        ExternalEmitHelpers[ExternalEmitHelpers["AsyncDelegatorIncludes"] = 26624] = "AsyncDelegatorIncludes";
        // Helpers included by ES2015 spread
        ExternalEmitHelpers[ExternalEmitHelpers["SpreadIncludes"] = 1536] = "SpreadIncludes";
    })(ExternalEmitHelpers = ts.ExternalEmitHelpers || (ts.ExternalEmitHelpers = {}));
    var EmitHint;
    (function (EmitHint) {
        EmitHint[EmitHint["SourceFile"] = 0] = "SourceFile";
        EmitHint[EmitHint["Expression"] = 1] = "Expression";
        EmitHint[EmitHint["IdentifierName"] = 2] = "IdentifierName";
        EmitHint[EmitHint["MappedTypeParameter"] = 3] = "MappedTypeParameter";
        EmitHint[EmitHint["Unspecified"] = 4] = "Unspecified";
    })(EmitHint = ts.EmitHint || (ts.EmitHint = {}));
    var ListFormat;
    (function (ListFormat) {
        ListFormat[ListFormat["None"] = 0] = "None";
        // Line separators
        ListFormat[ListFormat["SingleLine"] = 0] = "SingleLine";
        ListFormat[ListFormat["MultiLine"] = 1] = "MultiLine";
        ListFormat[ListFormat["PreserveLines"] = 2] = "PreserveLines";
        ListFormat[ListFormat["LinesMask"] = 3] = "LinesMask";
        // Delimiters
        ListFormat[ListFormat["NotDelimited"] = 0] = "NotDelimited";
        ListFormat[ListFormat["BarDelimited"] = 4] = "BarDelimited";
        ListFormat[ListFormat["AmpersandDelimited"] = 8] = "AmpersandDelimited";
        ListFormat[ListFormat["CommaDelimited"] = 16] = "CommaDelimited";
        ListFormat[ListFormat["DelimitersMask"] = 28] = "DelimitersMask";
        ListFormat[ListFormat["AllowTrailingComma"] = 32] = "AllowTrailingComma";
        // Whitespace
        ListFormat[ListFormat["Indented"] = 64] = "Indented";
        ListFormat[ListFormat["SpaceBetweenBraces"] = 128] = "SpaceBetweenBraces";
        ListFormat[ListFormat["SpaceBetweenSiblings"] = 256] = "SpaceBetweenSiblings";
        // Brackets/Braces
        ListFormat[ListFormat["Braces"] = 512] = "Braces";
        ListFormat[ListFormat["Parenthesis"] = 1024] = "Parenthesis";
        ListFormat[ListFormat["AngleBrackets"] = 2048] = "AngleBrackets";
        ListFormat[ListFormat["SquareBrackets"] = 4096] = "SquareBrackets";
        ListFormat[ListFormat["BracketsMask"] = 7680] = "BracketsMask";
        ListFormat[ListFormat["OptionalIfUndefined"] = 8192] = "OptionalIfUndefined";
        ListFormat[ListFormat["OptionalIfEmpty"] = 16384] = "OptionalIfEmpty";
        ListFormat[ListFormat["Optional"] = 24576] = "Optional";
        // Other
        ListFormat[ListFormat["PreferNewLine"] = 32768] = "PreferNewLine";
        ListFormat[ListFormat["NoTrailingNewLine"] = 65536] = "NoTrailingNewLine";
        ListFormat[ListFormat["NoInterveningComments"] = 131072] = "NoInterveningComments";
        ListFormat[ListFormat["NoSpaceIfEmpty"] = 262144] = "NoSpaceIfEmpty";
        ListFormat[ListFormat["SingleElement"] = 524288] = "SingleElement";
        // Precomputed Formats
        ListFormat[ListFormat["Modifiers"] = 131328] = "Modifiers";
        ListFormat[ListFormat["HeritageClauses"] = 256] = "HeritageClauses";
        ListFormat[ListFormat["SingleLineTypeLiteralMembers"] = 384] = "SingleLineTypeLiteralMembers";
        ListFormat[ListFormat["MultiLineTypeLiteralMembers"] = 16449] = "MultiLineTypeLiteralMembers";
        ListFormat[ListFormat["TupleTypeElements"] = 272] = "TupleTypeElements";
        ListFormat[ListFormat["UnionTypeConstituents"] = 260] = "UnionTypeConstituents";
        ListFormat[ListFormat["IntersectionTypeConstituents"] = 264] = "IntersectionTypeConstituents";
        ListFormat[ListFormat["ObjectBindingPatternElements"] = 262576] = "ObjectBindingPatternElements";
        ListFormat[ListFormat["ArrayBindingPatternElements"] = 262448] = "ArrayBindingPatternElements";
        ListFormat[ListFormat["ObjectLiteralExpressionProperties"] = 263122] = "ObjectLiteralExpressionProperties";
        ListFormat[ListFormat["ArrayLiteralExpressionElements"] = 4466] = "ArrayLiteralExpressionElements";
        ListFormat[ListFormat["CommaListElements"] = 272] = "CommaListElements";
        ListFormat[ListFormat["CallExpressionArguments"] = 1296] = "CallExpressionArguments";
        ListFormat[ListFormat["NewExpressionArguments"] = 9488] = "NewExpressionArguments";
        ListFormat[ListFormat["TemplateExpressionSpans"] = 131072] = "TemplateExpressionSpans";
        ListFormat[ListFormat["SingleLineBlockStatements"] = 384] = "SingleLineBlockStatements";
        ListFormat[ListFormat["MultiLineBlockStatements"] = 65] = "MultiLineBlockStatements";
        ListFormat[ListFormat["VariableDeclarationList"] = 272] = "VariableDeclarationList";
        ListFormat[ListFormat["SingleLineFunctionBodyStatements"] = 384] = "SingleLineFunctionBodyStatements";
        ListFormat[ListFormat["MultiLineFunctionBodyStatements"] = 1] = "MultiLineFunctionBodyStatements";
        ListFormat[ListFormat["ClassHeritageClauses"] = 0] = "ClassHeritageClauses";
        ListFormat[ListFormat["ClassMembers"] = 65] = "ClassMembers";
        ListFormat[ListFormat["InterfaceMembers"] = 65] = "InterfaceMembers";
        ListFormat[ListFormat["EnumMembers"] = 81] = "EnumMembers";
        ListFormat[ListFormat["CaseBlockClauses"] = 65] = "CaseBlockClauses";
        ListFormat[ListFormat["NamedImportsOrExportsElements"] = 262576] = "NamedImportsOrExportsElements";
        ListFormat[ListFormat["JsxElementOrFragmentChildren"] = 131072] = "JsxElementOrFragmentChildren";
        ListFormat[ListFormat["JsxElementAttributes"] = 131328] = "JsxElementAttributes";
        ListFormat[ListFormat["CaseOrDefaultClauseStatements"] = 81985] = "CaseOrDefaultClauseStatements";
        ListFormat[ListFormat["HeritageClauseTypes"] = 272] = "HeritageClauseTypes";
        ListFormat[ListFormat["SourceFileStatements"] = 65537] = "SourceFileStatements";
        ListFormat[ListFormat["Decorators"] = 24577] = "Decorators";
        ListFormat[ListFormat["TypeArguments"] = 26896] = "TypeArguments";
        ListFormat[ListFormat["TypeParameters"] = 26896] = "TypeParameters";
        ListFormat[ListFormat["Parameters"] = 1296] = "Parameters";
        ListFormat[ListFormat["IndexSignatureParameters"] = 4432] = "IndexSignatureParameters";
    })(ListFormat = ts.ListFormat || (ts.ListFormat = {}));
    /* @internal */
    var PragmaKindFlags;
    (function (PragmaKindFlags) {
        PragmaKindFlags[PragmaKindFlags["None"] = 0] = "None";
        /**
         * Triple slash comment of the form
         * /// <pragma-name argname="value" />
         */
        PragmaKindFlags[PragmaKindFlags["TripleSlashXML"] = 1] = "TripleSlashXML";
        /**
         * Single line comment of the form
         * // @pragma-name argval1 argval2
         * or
         * /// @pragma-name argval1 argval2
         */
        PragmaKindFlags[PragmaKindFlags["SingleLine"] = 2] = "SingleLine";
        /**
         * Multiline non-jsdoc pragma of the form
         * /* @pragma-name argval1 argval2 * /
         */
        PragmaKindFlags[PragmaKindFlags["MultiLine"] = 4] = "MultiLine";
        PragmaKindFlags[PragmaKindFlags["All"] = 7] = "All";
        PragmaKindFlags[PragmaKindFlags["Default"] = 7] = "Default";
    })(PragmaKindFlags = ts.PragmaKindFlags || (ts.PragmaKindFlags = {}));
    /**
     * This function only exists to cause exact types to be inferred for all the literals within `commentPragmas`
     */
    /* @internal */
    function _contextuallyTypePragmas(args) {
        return args;
    }
    // While not strictly a type, this is here because `PragmaMap` needs to be here to be used with `SourceFile`, and we don't
    //  fancy effectively defining it twice, once in value-space and once in type-space
    /* @internal */
    ts.commentPragmas = _contextuallyTypePragmas({
        "reference": {
            args: [
                { name: "types", optional: true, captureSpan: true },
                { name: "lib", optional: true, captureSpan: true },
                { name: "path", optional: true, captureSpan: true },
                { name: "no-default-lib", optional: true }
            ],
            kind: 1 /* TripleSlashXML */
        },
        "amd-dependency": {
            args: [{ name: "path" }, { name: "name", optional: true }],
            kind: 1 /* TripleSlashXML */
        },
        "amd-module": {
            args: [{ name: "name" }],
            kind: 1 /* TripleSlashXML */
        },
        "ts-check": {
            kind: 2 /* SingleLine */
        },
        "ts-nocheck": {
            kind: 2 /* SingleLine */
        },
        "jsx": {
            args: [{ name: "factory" }],
            kind: 4 /* MultiLine */
        },
    });
})(ts || (ts = {}));
var ts;
(function (ts) {
    /**
     * Set a high stack trace limit to provide more information in case of an error.
     * Called for command-line and server use cases.
     * Not called if TypeScript is used as a library.
     */
    /* @internal */
    function setStackTraceLimit() {
        if (Error.stackTraceLimit < 100) { // Also tests that we won't set the property if it doesn't exist.
            Error.stackTraceLimit = 100;
        }
    }
    ts.setStackTraceLimit = setStackTraceLimit;
    var FileWatcherEventKind;
    (function (FileWatcherEventKind) {
        FileWatcherEventKind[FileWatcherEventKind["Created"] = 0] = "Created";
        FileWatcherEventKind[FileWatcherEventKind["Changed"] = 1] = "Changed";
        FileWatcherEventKind[FileWatcherEventKind["Deleted"] = 2] = "Deleted";
    })(FileWatcherEventKind = ts.FileWatcherEventKind || (ts.FileWatcherEventKind = {}));
    /* @internal */
    var PollingInterval;
    (function (PollingInterval) {
        PollingInterval[PollingInterval["High"] = 2000] = "High";
        PollingInterval[PollingInterval["Medium"] = 500] = "Medium";
        PollingInterval[PollingInterval["Low"] = 250] = "Low";
    })(PollingInterval = ts.PollingInterval || (ts.PollingInterval = {}));
    function getPriorityValues(highPriorityValue) {
        var mediumPriorityValue = highPriorityValue * 2;
        var lowPriorityValue = mediumPriorityValue * 4;
        return [highPriorityValue, mediumPriorityValue, lowPriorityValue];
    }
    function pollingInterval(watchPriority) {
        return pollingIntervalsForPriority[watchPriority];
    }
    var pollingIntervalsForPriority = getPriorityValues(250);
    /* @internal */
    function watchFileUsingPriorityPollingInterval(host, fileName, callback, watchPriority) {
        return host.watchFile(fileName, callback, pollingInterval(watchPriority));
    }
    ts.watchFileUsingPriorityPollingInterval = watchFileUsingPriorityPollingInterval;
    /* @internal */
    ts.missingFileModifiedTime = new Date(0); // Any subsequent modification will occur after this time
    function createPollingIntervalBasedLevels(levels) {
        var _a;
        return _a = {},
            _a[PollingInterval.Low] = levels.Low,
            _a[PollingInterval.Medium] = levels.Medium,
            _a[PollingInterval.High] = levels.High,
            _a;
    }
    var defaultChunkLevels = { Low: 32, Medium: 64, High: 256 };
    var pollingChunkSize = createPollingIntervalBasedLevels(defaultChunkLevels);
    /* @internal */
    ts.unchangedPollThresholds = createPollingIntervalBasedLevels(defaultChunkLevels);
    /* @internal */
    function setCustomPollingValues(system) {
        if (!system.getEnvironmentVariable) {
            return;
        }
        var pollingIntervalChanged = setCustomLevels("TSC_WATCH_POLLINGINTERVAL", PollingInterval);
        pollingChunkSize = getCustomPollingBasedLevels("TSC_WATCH_POLLINGCHUNKSIZE", defaultChunkLevels) || pollingChunkSize;
        ts.unchangedPollThresholds = getCustomPollingBasedLevels("TSC_WATCH_UNCHANGEDPOLLTHRESHOLDS", defaultChunkLevels) || ts.unchangedPollThresholds;
        function getLevel(envVar, level) {
            return system.getEnvironmentVariable(envVar + "_" + level.toUpperCase());
        }
        function getCustomLevels(baseVariable) {
            var customLevels;
            setCustomLevel("Low");
            setCustomLevel("Medium");
            setCustomLevel("High");
            return customLevels;
            function setCustomLevel(level) {
                var customLevel = getLevel(baseVariable, level);
                if (customLevel) {
                    (customLevels || (customLevels = {}))[level] = Number(customLevel);
                }
            }
        }
        function setCustomLevels(baseVariable, levels) {
            var customLevels = getCustomLevels(baseVariable);
            if (customLevels) {
                setLevel("Low");
                setLevel("Medium");
                setLevel("High");
                return true;
            }
            return false;
            function setLevel(level) {
                levels[level] = customLevels[level] || levels[level];
            }
        }
        function getCustomPollingBasedLevels(baseVariable, defaultLevels) {
            var customLevels = getCustomLevels(baseVariable);
            return (pollingIntervalChanged || customLevels) &&
                createPollingIntervalBasedLevels(customLevels ? __assign({}, defaultLevels, customLevels) : defaultLevels);
        }
    }
    ts.setCustomPollingValues = setCustomPollingValues;
    /* @internal */
    function createDynamicPriorityPollingWatchFile(host) {
        var watchedFiles = [];
        var changedFilesInLastPoll = [];
        var lowPollingIntervalQueue = createPollingIntervalQueue(PollingInterval.Low);
        var mediumPollingIntervalQueue = createPollingIntervalQueue(PollingInterval.Medium);
        var highPollingIntervalQueue = createPollingIntervalQueue(PollingInterval.High);
        return watchFile;
        function watchFile(fileName, callback, defaultPollingInterval) {
            var file = {
                fileName: fileName,
                callback: callback,
                unchangedPolls: 0,
                mtime: getModifiedTime(fileName)
            };
            watchedFiles.push(file);
            addToPollingIntervalQueue(file, defaultPollingInterval);
            return {
                close: function () {
                    file.isClosed = true;
                    // Remove from watchedFiles
                    ts.unorderedRemoveItem(watchedFiles, file);
                    // Do not update polling interval queue since that will happen as part of polling
                }
            };
        }
        function createPollingIntervalQueue(pollingInterval) {
            var queue = [];
            queue.pollingInterval = pollingInterval;
            queue.pollIndex = 0;
            queue.pollScheduled = false;
            return queue;
        }
        function pollPollingIntervalQueue(queue) {
            queue.pollIndex = pollQueue(queue, queue.pollingInterval, queue.pollIndex, pollingChunkSize[queue.pollingInterval]);
            // Set the next polling index and timeout
            if (queue.length) {
                scheduleNextPoll(queue.pollingInterval);
            }
            else {
                ts.Debug.assert(queue.pollIndex === 0);
                queue.pollScheduled = false;
            }
        }
        function pollLowPollingIntervalQueue(queue) {
            // Always poll complete list of changedFilesInLastPoll
            pollQueue(changedFilesInLastPoll, PollingInterval.Low, /*pollIndex*/ 0, changedFilesInLastPoll.length);
            // Finally do the actual polling of the queue
            pollPollingIntervalQueue(queue);
            // Schedule poll if there are files in changedFilesInLastPoll but no files in the actual queue
            // as pollPollingIntervalQueue wont schedule for next poll
            if (!queue.pollScheduled && changedFilesInLastPoll.length) {
                scheduleNextPoll(PollingInterval.Low);
            }
        }
        function pollQueue(queue, pollingInterval, pollIndex, chunkSize) {
            // Max visit would be all elements of the queue
            var needsVisit = queue.length;
            var definedValueCopyToIndex = pollIndex;
            for (var polled = 0; polled < chunkSize && needsVisit > 0; nextPollIndex(), needsVisit--) {
                var watchedFile = queue[pollIndex];
                if (!watchedFile) {
                    continue;
                }
                else if (watchedFile.isClosed) {
                    queue[pollIndex] = undefined;
                    continue;
                }
                polled++;
                var fileChanged = onWatchedFileStat(watchedFile, getModifiedTime(watchedFile.fileName));
                if (watchedFile.isClosed) {
                    // Closed watcher as part of callback
                    queue[pollIndex] = undefined;
                }
                else if (fileChanged) {
                    watchedFile.unchangedPolls = 0;
                    // Changed files go to changedFilesInLastPoll queue
                    if (queue !== changedFilesInLastPoll) {
                        queue[pollIndex] = undefined;
                        addChangedFileToLowPollingIntervalQueue(watchedFile);
                    }
                }
                else if (watchedFile.unchangedPolls !== ts.unchangedPollThresholds[pollingInterval]) {
                    watchedFile.unchangedPolls++;
                }
                else if (queue === changedFilesInLastPoll) {
                    // Restart unchangedPollCount for unchanged file and move to low polling interval queue
                    watchedFile.unchangedPolls = 1;
                    queue[pollIndex] = undefined;
                    addToPollingIntervalQueue(watchedFile, PollingInterval.Low);
                }
                else if (pollingInterval !== PollingInterval.High) {
                    watchedFile.unchangedPolls++;
                    queue[pollIndex] = undefined;
                    addToPollingIntervalQueue(watchedFile, pollingInterval === PollingInterval.Low ? PollingInterval.Medium : PollingInterval.High);
                }
                if (queue[pollIndex]) {
                    // Copy this file to the non hole location
                    if (definedValueCopyToIndex < pollIndex) {
                        queue[definedValueCopyToIndex] = watchedFile;
                        queue[pollIndex] = undefined;
                    }
                    definedValueCopyToIndex++;
                }
            }
            // Return next poll index
            return pollIndex;
            function nextPollIndex() {
                pollIndex++;
                if (pollIndex === queue.length) {
                    if (definedValueCopyToIndex < pollIndex) {
                        // There are holes from nextDefinedValueIndex to end of queue, change queue size
                        queue.length = definedValueCopyToIndex;
                    }
                    pollIndex = 0;
                    definedValueCopyToIndex = 0;
                }
            }
        }
        function pollingIntervalQueue(pollingInterval) {
            switch (pollingInterval) {
                case PollingInterval.Low:
                    return lowPollingIntervalQueue;
                case PollingInterval.Medium:
                    return mediumPollingIntervalQueue;
                case PollingInterval.High:
                    return highPollingIntervalQueue;
            }
        }
        function addToPollingIntervalQueue(file, pollingInterval) {
            pollingIntervalQueue(pollingInterval).push(file);
            scheduleNextPollIfNotAlreadyScheduled(pollingInterval);
        }
        function addChangedFileToLowPollingIntervalQueue(file) {
            changedFilesInLastPoll.push(file);
            scheduleNextPollIfNotAlreadyScheduled(PollingInterval.Low);
        }
        function scheduleNextPollIfNotAlreadyScheduled(pollingInterval) {
            if (!pollingIntervalQueue(pollingInterval).pollScheduled) {
                scheduleNextPoll(pollingInterval);
            }
        }
        function scheduleNextPoll(pollingInterval) {
            pollingIntervalQueue(pollingInterval).pollScheduled = host.setTimeout(pollingInterval === PollingInterval.Low ? pollLowPollingIntervalQueue : pollPollingIntervalQueue, pollingInterval, pollingIntervalQueue(pollingInterval));
        }
        function getModifiedTime(fileName) {
            return host.getModifiedTime(fileName) || ts.missingFileModifiedTime;
        }
    }
    ts.createDynamicPriorityPollingWatchFile = createDynamicPriorityPollingWatchFile;
    /**
     * Returns true if file status changed
     */
    /*@internal*/
    function onWatchedFileStat(watchedFile, modifiedTime) {
        var oldTime = watchedFile.mtime.getTime();
        var newTime = modifiedTime.getTime();
        if (oldTime !== newTime) {
            watchedFile.mtime = modifiedTime;
            var eventKind = oldTime === 0
                ? FileWatcherEventKind.Created
                : newTime === 0
                    ? FileWatcherEventKind.Deleted
                    : FileWatcherEventKind.Changed;
            watchedFile.callback(watchedFile.fileName, eventKind);
            return true;
        }
        return false;
    }
    ts.onWatchedFileStat = onWatchedFileStat;
    /**
     * Watch the directory recursively using host provided method to watch child directories
     * that means if this is recursive watcher, watch the children directories as well
     * (eg on OS that dont support recursive watch using fs.watch use fs.watchFile)
     */
    /*@internal*/
    function createRecursiveDirectoryWatcher(host) {
        return createDirectoryWatcher;
        /**
         * Create the directory watcher for the dirPath.
         */
        function createDirectoryWatcher(dirName, callback) {
            var watcher = host.watchDirectory(dirName, function (fileName) {
                // Call the actual callback
                callback(fileName);
                // Iterate through existing children and update the watches if needed
                updateChildWatches(result, callback);
            });
            var result = {
                close: function () {
                    watcher.close();
                    result.childWatches.forEach(ts.closeFileWatcher);
                    result = undefined;
                },
                dirName: dirName,
                childWatches: ts.emptyArray
            };
            updateChildWatches(result, callback);
            return result;
        }
        function updateChildWatches(watcher, callback) {
            // Iterate through existing children and update the watches if needed
            if (watcher) {
                watcher.childWatches = watchChildDirectories(watcher.dirName, watcher.childWatches, callback);
            }
        }
        /**
         * Watch the directories in the parentDir
         */
        function watchChildDirectories(parentDir, existingChildWatches, callback) {
            var newChildWatches;
            ts.enumerateInsertsAndDeletes(host.directoryExists(parentDir) ? ts.mapDefined(host.getAccessibleSortedChildDirectories(parentDir), function (child) {
                var childFullName = ts.getNormalizedAbsolutePath(child, parentDir);
                // Filter our the symbolic link directories since those arent included in recursive watch
                // which is same behaviour when recursive: true is passed to fs.watch
                return host.filePathComparer(childFullName, host.realpath(childFullName)) === 0 /* EqualTo */ ? childFullName : undefined;
            }) : ts.emptyArray, existingChildWatches, function (child, childWatcher) { return host.filePathComparer(child, childWatcher.dirName); }, createAndAddChildDirectoryWatcher, ts.closeFileWatcher, addChildDirectoryWatcher);
            return newChildWatches || ts.emptyArray;
            /**
             * Create new childDirectoryWatcher and add it to the new ChildDirectoryWatcher list
             */
            function createAndAddChildDirectoryWatcher(childName) {
                var result = createDirectoryWatcher(childName, callback);
                addChildDirectoryWatcher(result);
            }
            /**
             * Add child directory watcher to the new ChildDirectoryWatcher list
             */
            function addChildDirectoryWatcher(childWatcher) {
                (newChildWatches || (newChildWatches = [])).push(childWatcher);
            }
        }
    }
    ts.createRecursiveDirectoryWatcher = createRecursiveDirectoryWatcher;
    function getNodeMajorVersion() {
        if (typeof process === "undefined") {
            return undefined;
        }
        var version = process.version;
        if (!version) {
            return undefined;
        }
        var dot = version.indexOf(".");
        if (dot === -1) {
            return undefined;
        }
        return parseInt(version.substring(1, dot));
    }
    ts.getNodeMajorVersion = getNodeMajorVersion;
    // TODO: this is used as if it's certainly defined in many places.
    ts.sys = (function () {
        // NodeJS detects "\uFEFF" at the start of the string and *replaces* it with the actual
        // byte order mark from the specified encoding. Using any other byte order mark does
        // not actually work.
        var byteOrderMarkIndicator = "\uFEFF";
        function getNodeSystem() {
            var _fs = require("fs");
            var _path = require("path");
            var _os = require("os");
            // crypto can be absent on reduced node installations
            var _crypto;
            try {
                _crypto = require("crypto");
            }
            catch (_a) {
                _crypto = undefined;
            }
            var Buffer = require("buffer").Buffer;
            var nodeVersion = getNodeMajorVersion();
            var isNode4OrLater = nodeVersion >= 4;
            var platform = _os.platform();
            var useCaseSensitiveFileNames = isFileSystemCaseSensitive();
            var FileSystemEntryKind;
            (function (FileSystemEntryKind) {
                FileSystemEntryKind[FileSystemEntryKind["File"] = 0] = "File";
                FileSystemEntryKind[FileSystemEntryKind["Directory"] = 1] = "Directory";
            })(FileSystemEntryKind || (FileSystemEntryKind = {}));
            var useNonPollingWatchers = process.env.TSC_NONPOLLING_WATCHER;
            var tscWatchFile = process.env.TSC_WATCHFILE;
            var tscWatchDirectory = process.env.TSC_WATCHDIRECTORY;
            var dynamicPollingWatchFile;
            var nodeSystem = {
                args: process.argv.slice(2),
                newLine: _os.EOL,
                useCaseSensitiveFileNames: useCaseSensitiveFileNames,
                write: function (s) {
                    process.stdout.write(s);
                },
                writeOutputIsTTY: function () {
                    return process.stdout.isTTY;
                },
                readFile: readFile,
                writeFile: writeFile,
                watchFile: getWatchFile(),
                watchDirectory: getWatchDirectory(),
                resolvePath: function (path) { return _path.resolve(path); },
                fileExists: fileExists,
                directoryExists: directoryExists,
                createDirectory: function (directoryName) {
                    if (!nodeSystem.directoryExists(directoryName)) {
                        _fs.mkdirSync(directoryName);
                    }
                },
                getExecutingFilePath: function () {
                    return __filename;
                },
                getCurrentDirectory: function () {
                    return process.cwd();
                },
                getDirectories: getDirectories,
                getEnvironmentVariable: function (name) {
                    return process.env[name] || "";
                },
                readDirectory: readDirectory,
                getModifiedTime: getModifiedTime,
                setModifiedTime: setModifiedTime,
                deleteFile: deleteFile,
                createHash: _crypto ? createMD5HashUsingNativeCrypto : generateDjb2Hash,
                createSHA256Hash: _crypto ? createSHA256Hash : undefined,
                getMemoryUsage: function () {
                    if (global.gc) {
                        global.gc();
                    }
                    return process.memoryUsage().heapUsed;
                },
                getFileSize: function (path) {
                    try {
                        var stat = _fs.statSync(path);
                        if (stat.isFile()) {
                            return stat.size;
                        }
                    }
                    catch ( /*ignore*/_a) { /*ignore*/ }
                    return 0;
                },
                exit: function (exitCode) {
                    process.exit(exitCode);
                },
                realpath: realpath,
                debugMode: ts.some(process.execArgv, function (arg) { return /^--(inspect|debug)(-brk)?(=\d+)?$/i.test(arg); }),
                tryEnableSourceMapsForHost: function () {
                    try {
                        require("source-map-support").install();
                    }
                    catch (_a) {
                        // Could not enable source maps.
                    }
                },
                setTimeout: setTimeout,
                clearTimeout: clearTimeout,
                clearScreen: function () {
                    process.stdout.write("\x1Bc");
                },
                setBlocking: function () {
                    if (process.stdout && process.stdout._handle && process.stdout._handle.setBlocking) {
                        process.stdout._handle.setBlocking(true);
                    }
                },
                base64decode: Buffer.from ? function (input) {
                    return Buffer.from(input, "base64").toString("utf8");
                } : function (input) {
                    return new Buffer(input, "base64").toString("utf8");
                },
                base64encode: Buffer.from ? function (input) {
                    return Buffer.from(input).toString("base64");
                } : function (input) {
                    return new Buffer(input).toString("base64");
                }
            };
            return nodeSystem;
            function isFileSystemCaseSensitive() {
                // win32\win64 are case insensitive platforms
                if (platform === "win32" || platform === "win64") {
                    return false;
                }
                // If this file exists under a different case, we must be case-insensitve.
                return !fileExists(swapCase(__filename));
            }
            /** Convert all lowercase chars to uppercase, and vice-versa */
            function swapCase(s) {
                return s.replace(/\w/g, function (ch) {
                    var up = ch.toUpperCase();
                    return ch === up ? ch.toLowerCase() : up;
                });
            }
            function getWatchFile() {
                switch (tscWatchFile) {
                    case "PriorityPollingInterval":
                        // Use polling interval based on priority when create watch using host.watchFile
                        return fsWatchFile;
                    case "DynamicPriorityPolling":
                        // Use polling interval but change the interval depending on file changes and their default polling interval
                        return createDynamicPriorityPollingWatchFile({ getModifiedTime: getModifiedTime, setTimeout: setTimeout });
                    case "UseFsEvents":
                        // Use notifications from FS to watch with falling back to fs.watchFile
                        return watchFileUsingFsWatch;
                    case "UseFsEventsWithFallbackDynamicPolling":
                        // Use notifications from FS to watch with falling back to dynamic watch file
                        dynamicPollingWatchFile = createDynamicPriorityPollingWatchFile({ getModifiedTime: getModifiedTime, setTimeout: setTimeout });
                        return createWatchFileUsingDynamicWatchFile(dynamicPollingWatchFile);
                    case "UseFsEventsOnParentDirectory":
                        // Use notifications from FS to watch with falling back to fs.watchFile
                        return createNonPollingWatchFile();
                }
                return useNonPollingWatchers ?
                    createNonPollingWatchFile() :
                    // Default to do not use polling interval as it is before this experiment branch
                    function (fileName, callback) { return fsWatchFile(fileName, callback); };
            }
            function getWatchDirectory() {
                // Node 4.0 `fs.watch` function supports the "recursive" option on both OSX and Windows
                // (ref: https://github.com/nodejs/node/pull/2649 and https://github.com/Microsoft/TypeScript/issues/4643)
                var fsSupportsRecursive = isNode4OrLater && (process.platform === "win32" || process.platform === "darwin");
                if (fsSupportsRecursive) {
                    return watchDirectoryUsingFsWatch;
                }
                var watchDirectory = tscWatchDirectory === "RecursiveDirectoryUsingFsWatchFile" ?
                    createWatchDirectoryUsing(fsWatchFile) :
                    tscWatchDirectory === "RecursiveDirectoryUsingDynamicPriorityPolling" ?
                        createWatchDirectoryUsing(dynamicPollingWatchFile || createDynamicPriorityPollingWatchFile({ getModifiedTime: getModifiedTime, setTimeout: setTimeout })) :
                        watchDirectoryUsingFsWatch;
                var watchDirectoryRecursively = createRecursiveDirectoryWatcher({
                    filePathComparer: ts.getStringComparer(!useCaseSensitiveFileNames),
                    directoryExists: directoryExists,
                    getAccessibleSortedChildDirectories: function (path) { return getAccessibleFileSystemEntries(path).directories; },
                    watchDirectory: watchDirectory,
                    realpath: realpath
                });
                return function (directoryName, callback, recursive) {
                    if (recursive) {
                        return watchDirectoryRecursively(directoryName, callback);
                    }
                    watchDirectory(directoryName, callback);
                    return undefined; // TODO: GH#18217
                };
            }
            function createNonPollingWatchFile() {
                // One file can have multiple watchers
                var fileWatcherCallbacks = ts.createMultiMap();
                var dirWatchers = ts.createMap();
                var toCanonicalName = ts.createGetCanonicalFileName(useCaseSensitiveFileNames);
                return nonPollingWatchFile;
                function nonPollingWatchFile(fileName, callback) {
                    var filePath = toCanonicalName(fileName);
                    fileWatcherCallbacks.add(filePath, callback);
                    var dirPath = ts.getDirectoryPath(filePath) || ".";
                    var watcher = dirWatchers.get(dirPath) || createDirectoryWatcher(ts.getDirectoryPath(fileName) || ".", dirPath);
                    watcher.referenceCount++;
                    return {
                        close: function () {
                            if (watcher.referenceCount === 1) {
                                watcher.close();
                                dirWatchers.delete(dirPath);
                            }
                            else {
                                watcher.referenceCount--;
                            }
                            fileWatcherCallbacks.remove(filePath, callback);
                        }
                    };
                }
                function createDirectoryWatcher(dirName, dirPath) {
                    var watcher = fsWatchDirectory(dirName, function (_eventName, relativeFileName) {
                        // When files are deleted from disk, the triggered "rename" event would have a relativefileName of "undefined"
                        var fileName = !ts.isString(relativeFileName)
                            ? undefined // TODO: GH#18217
                            : ts.getNormalizedAbsolutePath(relativeFileName, dirName);
                        // Some applications save a working file via rename operations
                        var callbacks = fileWatcherCallbacks.get(toCanonicalName(fileName));
                        if (callbacks) {
                            for (var _i = 0, callbacks_1 = callbacks; _i < callbacks_1.length; _i++) {
                                var fileCallback = callbacks_1[_i];
                                fileCallback(fileName, FileWatcherEventKind.Changed);
                            }
                        }
                    });
                    watcher.referenceCount = 0;
                    dirWatchers.set(dirPath, watcher);
                    return watcher;
                }
            }
            function fsWatchFile(fileName, callback, pollingInterval) {
                _fs.watchFile(fileName, { persistent: true, interval: pollingInterval || 250 }, fileChanged);
                var eventKind;
                return {
                    close: function () { return _fs.unwatchFile(fileName, fileChanged); }
                };
                function fileChanged(curr, prev) {
                    // previous event kind check is to ensure we recongnize the file as previously also missing when it is restored or renamed twice (that is it disappears and reappears)
                    // In such case, prevTime returned is same as prev time of event when file was deleted as per node documentation
                    var isPreviouslyDeleted = +prev.mtime === 0 || eventKind === FileWatcherEventKind.Deleted;
                    if (+curr.mtime === 0) {
                        if (isPreviouslyDeleted) {
                            // Already deleted file, no need to callback again
                            return;
                        }
                        eventKind = FileWatcherEventKind.Deleted;
                    }
                    else if (isPreviouslyDeleted) {
                        eventKind = FileWatcherEventKind.Created;
                    }
                    // If there is no change in modified time, ignore the event
                    else if (+curr.mtime === +prev.mtime) {
                        return;
                    }
                    else {
                        // File changed
                        eventKind = FileWatcherEventKind.Changed;
                    }
                    callback(fileName, eventKind);
                }
            }
            function createFileWatcherCallback(callback) {
                return function (_fileName, eventKind) { return callback(eventKind === FileWatcherEventKind.Changed ? "change" : "rename", ""); };
            }
            function createFsWatchCallbackForFileWatcherCallback(fileName, callback) {
                return function (eventName) {
                    if (eventName === "rename") {
                        callback(fileName, fileExists(fileName) ? FileWatcherEventKind.Created : FileWatcherEventKind.Deleted);
                    }
                    else {
                        // Change
                        callback(fileName, FileWatcherEventKind.Changed);
                    }
                };
            }
            function createFsWatchCallbackForDirectoryWatcherCallback(directoryName, callback) {
                return function (eventName, relativeFileName) {
                    // In watchDirectory we only care about adding and removing files (when event name is
                    // "rename"); changes made within files are handled by corresponding fileWatchers (when
                    // event name is "change")
                    if (eventName === "rename") {
                        // When deleting a file, the passed baseFileName is null
                        callback(!relativeFileName ? directoryName : ts.normalizePath(ts.combinePaths(directoryName, relativeFileName)));
                    }
                };
            }
            function fsWatch(fileOrDirectory, entryKind, callback, recursive, fallbackPollingWatchFile, pollingInterval) {
                var options;
                /** Watcher for the file system entry depending on whether it is missing or present */
                var watcher = !fileSystemEntryExists(fileOrDirectory, entryKind) ?
                    watchMissingFileSystemEntry() :
                    watchPresentFileSystemEntry();
                return {
                    close: function () {
                        // Close the watcher (either existing file system entry watcher or missing file system entry watcher)
                        watcher.close();
                        watcher = undefined;
                    }
                };
                /**
                 * Invoke the callback with rename and update the watcher if not closed
                 * @param createWatcher
                 */
                function invokeCallbackAndUpdateWatcher(createWatcher) {
                    // Call the callback for current directory
                    callback("rename", "");
                    // If watcher is not closed, update it
                    if (watcher) {
                        watcher.close();
                        watcher = createWatcher();
                    }
                }
                /**
                 * Watch the file or directory that is currently present
                 * and when the watched file or directory is deleted, switch to missing file system entry watcher
                 */
                function watchPresentFileSystemEntry() {
                    // Node 4.0 `fs.watch` function supports the "recursive" option on both OSX and Windows
                    // (ref: https://github.com/nodejs/node/pull/2649 and https://github.com/Microsoft/TypeScript/issues/4643)
                    if (options === undefined) {
                        if (isNode4OrLater && (process.platform === "win32" || process.platform === "darwin")) {
                            options = { persistent: true, recursive: !!recursive };
                        }
                        else {
                            options = { persistent: true };
                        }
                    }
                    try {
                        var presentWatcher = _fs.watch(fileOrDirectory, options, callback);
                        // Watch the missing file or directory or error
                        presentWatcher.on("error", function () { return invokeCallbackAndUpdateWatcher(watchMissingFileSystemEntry); });
                        return presentWatcher;
                    }
                    catch (e) {
                        // Catch the exception and use polling instead
                        // Eg. on linux the number of watches are limited and one could easily exhaust watches and the exception ENOSPC is thrown when creating watcher at that point
                        // so instead of throwing error, use fs.watchFile
                        return watchPresentFileSystemEntryWithFsWatchFile();
                    }
                }
                /**
                 * Watch the file or directory using fs.watchFile since fs.watch threw exception
                 * Eg. on linux the number of watches are limited and one could easily exhaust watches and the exception ENOSPC is thrown when creating watcher at that point
                 */
                function watchPresentFileSystemEntryWithFsWatchFile() {
                    return fallbackPollingWatchFile(fileOrDirectory, createFileWatcherCallback(callback), pollingInterval);
                }
                /**
                 * Watch the file or directory that is missing
                 * and switch to existing file or directory when the missing filesystem entry is created
                 */
                function watchMissingFileSystemEntry() {
                    return fallbackPollingWatchFile(fileOrDirectory, function (_fileName, eventKind) {
                        if (eventKind === FileWatcherEventKind.Created && fileSystemEntryExists(fileOrDirectory, entryKind)) {
                            // Call the callback for current file or directory
                            // For now it could be callback for the inner directory creation,
                            // but just return current directory, better than current no-op
                            invokeCallbackAndUpdateWatcher(watchPresentFileSystemEntry);
                        }
                    }, pollingInterval);
                }
            }
            function watchFileUsingFsWatch(fileName, callback, pollingInterval) {
                return fsWatch(fileName, 0 /* File */, createFsWatchCallbackForFileWatcherCallback(fileName, callback), /*recursive*/ false, fsWatchFile, pollingInterval);
            }
            function createWatchFileUsingDynamicWatchFile(watchFile) {
                return function (fileName, callback, pollingInterval) { return fsWatch(fileName, 0 /* File */, createFsWatchCallbackForFileWatcherCallback(fileName, callback), /*recursive*/ false, watchFile, pollingInterval); };
            }
            function fsWatchDirectory(directoryName, callback, recursive) {
                return fsWatch(directoryName, 1 /* Directory */, callback, !!recursive, fsWatchFile);
            }
            function watchDirectoryUsingFsWatch(directoryName, callback, recursive) {
                return fsWatchDirectory(directoryName, createFsWatchCallbackForDirectoryWatcherCallback(directoryName, callback), recursive);
            }
            function createWatchDirectoryUsing(fsWatchFile) {
                return function (directoryName, callback) { return fsWatchFile(directoryName, function () { return callback(directoryName); }, PollingInterval.Medium); };
            }
            function readFile(fileName, _encoding) {
                if (!fileExists(fileName)) {
                    return undefined;
                }
                var buffer = _fs.readFileSync(fileName);
                var len = buffer.length;
                if (len >= 2 && buffer[0] === 0xFE && buffer[1] === 0xFF) {
                    // Big endian UTF-16 byte order mark detected. Since big endian is not supported by node.js,
                    // flip all byte pairs and treat as little endian.
                    len &= ~1; // Round down to a multiple of 2
                    for (var i = 0; i < len; i += 2) {
                        var temp = buffer[i];
                        buffer[i] = buffer[i + 1];
                        buffer[i + 1] = temp;
                    }
                    return buffer.toString("utf16le", 2);
                }
                if (len >= 2 && buffer[0] === 0xFF && buffer[1] === 0xFE) {
                    // Little endian UTF-16 byte order mark detected
                    return buffer.toString("utf16le", 2);
                }
                if (len >= 3 && buffer[0] === 0xEF && buffer[1] === 0xBB && buffer[2] === 0xBF) {
                    // UTF-8 byte order mark detected
                    return buffer.toString("utf8", 3);
                }
                // Default is UTF-8 with no byte order mark
                return buffer.toString("utf8");
            }
            function writeFile(fileName, data, writeByteOrderMark) {
                // If a BOM is required, emit one
                if (writeByteOrderMark) {
                    data = byteOrderMarkIndicator + data;
                }
                var fd;
                try {
                    fd = _fs.openSync(fileName, "w");
                    _fs.writeSync(fd, data, /*position*/ undefined, "utf8");
                }
                finally {
                    if (fd !== undefined) {
                        _fs.closeSync(fd);
                    }
                }
            }
            function getAccessibleFileSystemEntries(path) {
                try {
                    var entries = _fs.readdirSync(path || ".").sort();
                    var files = [];
                    var directories = [];
                    for (var _i = 0, entries_1 = entries; _i < entries_1.length; _i++) {
                        var entry = entries_1[_i];
                        // This is necessary because on some file system node fails to exclude
                        // "." and "..". See https://github.com/nodejs/node/issues/4002
                        if (entry === "." || entry === "..") {
                            continue;
                        }
                        var name = ts.combinePaths(path, entry);
                        var stat = void 0;
                        try {
                            stat = _fs.statSync(name);
                        }
                        catch (e) {
                            continue;
                        }
                        if (stat.isFile()) {
                            files.push(entry);
                        }
                        else if (stat.isDirectory()) {
                            directories.push(entry);
                        }
                    }
                    return { files: files, directories: directories };
                }
                catch (e) {
                    return ts.emptyFileSystemEntries;
                }
            }
            function readDirectory(path, extensions, excludes, includes, depth) {
                return ts.matchFiles(path, extensions, excludes, includes, useCaseSensitiveFileNames, process.cwd(), depth, getAccessibleFileSystemEntries);
            }
            function fileSystemEntryExists(path, entryKind) {
                try {
                    var stat = _fs.statSync(path);
                    switch (entryKind) {
                        case 0 /* File */: return stat.isFile();
                        case 1 /* Directory */: return stat.isDirectory();
                        default: return false;
                    }
                }
                catch (e) {
                    return false;
                }
            }
            function fileExists(path) {
                return fileSystemEntryExists(path, 0 /* File */);
            }
            function directoryExists(path) {
                return fileSystemEntryExists(path, 1 /* Directory */);
            }
            function getDirectories(path) {
                return ts.filter(_fs.readdirSync(path), function (dir) { return fileSystemEntryExists(ts.combinePaths(path, dir), 1 /* Directory */); });
            }
            function realpath(path) {
                try {
                    return _fs.realpathSync(path);
                }
                catch (_a) {
                    return path;
                }
            }
            function getModifiedTime(path) {
                try {
                    return _fs.statSync(path).mtime;
                }
                catch (e) {
                    return undefined;
                }
            }
            function setModifiedTime(path, time) {
                try {
                    _fs.utimesSync(path, time, time);
                }
                catch (e) {
                    return;
                }
            }
            function deleteFile(path) {
                try {
                    return _fs.unlinkSync(path);
                }
                catch (e) {
                    return;
                }
            }
            /**
             * djb2 hashing algorithm
             * http://www.cse.yorku.ca/~oz/hash.html
             */
            function generateDjb2Hash(data) {
                var chars = data.split("").map(function (str) { return str.charCodeAt(0); });
                return "" + chars.reduce(function (prev, curr) { return ((prev << 5) + prev) + curr; }, 5381);
            }
            function createMD5HashUsingNativeCrypto(data) {
                var hash = _crypto.createHash("md5");
                hash.update(data);
                return hash.digest("hex");
            }
            function createSHA256Hash(data) {
                var hash = _crypto.createHash("sha256");
                hash.update(data);
                return hash.digest("hex");
            }
        }
        function getChakraSystem() {
            var realpath = ChakraHost.realpath && (function (path) { return ChakraHost.realpath(path); });
            return {
                newLine: ChakraHost.newLine || "\r\n",
                args: ChakraHost.args,
                useCaseSensitiveFileNames: !!ChakraHost.useCaseSensitiveFileNames,
                write: ChakraHost.echo,
                readFile: function (path, _encoding) {
                    // encoding is automatically handled by the implementation in ChakraHost
                    return ChakraHost.readFile(path);
                },
                writeFile: function (path, data, writeByteOrderMark) {
                    // If a BOM is required, emit one
                    if (writeByteOrderMark) {
                        data = byteOrderMarkIndicator + data;
                    }
                    ChakraHost.writeFile(path, data);
                },
                resolvePath: ChakraHost.resolvePath,
                fileExists: ChakraHost.fileExists,
                directoryExists: ChakraHost.directoryExists,
                createDirectory: ChakraHost.createDirectory,
                getExecutingFilePath: function () { return ChakraHost.executingFile; },
                getCurrentDirectory: function () { return ChakraHost.currentDirectory; },
                getDirectories: ChakraHost.getDirectories,
                getEnvironmentVariable: ChakraHost.getEnvironmentVariable || (function () { return ""; }),
                readDirectory: function (path, extensions, excludes, includes, _depth) {
                    var pattern = ts.getFileMatcherPatterns(path, excludes, includes, !!ChakraHost.useCaseSensitiveFileNames, ChakraHost.currentDirectory);
                    return ChakraHost.readDirectory(path, extensions, pattern.basePaths, pattern.excludePattern, pattern.includeFilePattern, pattern.includeDirectoryPattern);
                },
                exit: ChakraHost.quit,
                realpath: realpath
            };
        }
        function recursiveCreateDirectory(directoryPath, sys) {
            var basePath = ts.getDirectoryPath(directoryPath);
            var shouldCreateParent = basePath !== "" && directoryPath !== basePath && !sys.directoryExists(basePath);
            if (shouldCreateParent) {
                recursiveCreateDirectory(basePath, sys);
            }
            if (shouldCreateParent || !sys.directoryExists(directoryPath)) {
                sys.createDirectory(directoryPath);
            }
        }
        var sys;
        if (typeof ChakraHost !== "undefined") {
            sys = getChakraSystem();
        }
        else if (typeof process !== "undefined" && process.nextTick && !process.browser && typeof require !== "undefined") {
            // process and process.nextTick checks if current environment is node-like
            // process.browser check excludes webpack and browserify
            sys = getNodeSystem();
        }
        if (sys) {
            // patch writefile to create folder before writing the file
            var originalWriteFile_1 = sys.writeFile;
            sys.writeFile = function (path, data, writeBom) {
                var directoryPath = ts.getDirectoryPath(ts.normalizeSlashes(path));
                if (directoryPath && !sys.directoryExists(directoryPath)) {
                    recursiveCreateDirectory(directoryPath, sys);
                }
                originalWriteFile_1.call(sys, path, data, writeBom);
            };
        }
        return sys;
    })();
    if (ts.sys && ts.sys.getEnvironmentVariable) {
        setCustomPollingValues(ts.sys);
        ts.Debug.currentAssertionLevel = /^development$/i.test(ts.sys.getEnvironmentVariable("NODE_ENV"))
            ? 1 /* Normal */
            : 0 /* None */;
    }
    if (ts.sys && ts.sys.debugMode) {
        ts.Debug.isDebugging = true;
    }
})(ts || (ts = {}));
// <auto-generated />
// generated from './diagnosticInformationMap.generated.ts' by 'src\parser'
/* @internal */
var ts;
(function (ts) {
    function diag(code, category, key, message, reportsUnnecessary) {
        return { code: code, category: category, key: key, message: message, reportsUnnecessary: reportsUnnecessary };
    }
    // tslint:disable-next-line variable-name
    ts.Diagnostics = {
        Unterminated_string_literal: diag(1002, ts.DiagnosticCategory.Error, "Unterminated_string_literal_1002", "Unterminated string literal."),
        Identifier_expected: diag(1003, ts.DiagnosticCategory.Error, "Identifier_expected_1003", "Identifier expected."),
        _0_expected: diag(1005, ts.DiagnosticCategory.Error, "_0_expected_1005", "'{0}' expected."),
        A_file_cannot_have_a_reference_to_itself: diag(1006, ts.DiagnosticCategory.Error, "A_file_cannot_have_a_reference_to_itself_1006", "A file cannot have a reference to itself."),
        Trailing_comma_not_allowed: diag(1009, ts.DiagnosticCategory.Error, "Trailing_comma_not_allowed_1009", "Trailing comma not allowed."),
        Asterisk_Slash_expected: diag(1010, ts.DiagnosticCategory.Error, "Asterisk_Slash_expected_1010", "'*/' expected."),
        An_element_access_expression_should_take_an_argument: diag(1011, ts.DiagnosticCategory.Error, "An_element_access_expression_should_take_an_argument_1011", "An element access expression should take an argument."),
        Unexpected_token: diag(1012, ts.DiagnosticCategory.Error, "Unexpected_token_1012", "Unexpected token."),
        A_rest_parameter_or_binding_pattern_may_not_have_a_trailing_comma: diag(1013, ts.DiagnosticCategory.Error, "A_rest_parameter_or_binding_pattern_may_not_have_a_trailing_comma_1013", "A rest parameter or binding pattern may not have a trailing comma."),
        A_rest_parameter_must_be_last_in_a_parameter_list: diag(1014, ts.DiagnosticCategory.Error, "A_rest_parameter_must_be_last_in_a_parameter_list_1014", "A rest parameter must be last in a parameter list."),
        Parameter_cannot_have_question_mark_and_initializer: diag(1015, ts.DiagnosticCategory.Error, "Parameter_cannot_have_question_mark_and_initializer_1015", "Parameter cannot have question mark and initializer."),
        A_required_parameter_cannot_follow_an_optional_parameter: diag(1016, ts.DiagnosticCategory.Error, "A_required_parameter_cannot_follow_an_optional_parameter_1016", "A required parameter cannot follow an optional parameter."),
        An_index_signature_cannot_have_a_rest_parameter: diag(1017, ts.DiagnosticCategory.Error, "An_index_signature_cannot_have_a_rest_parameter_1017", "An index signature cannot have a rest parameter."),
        An_index_signature_parameter_cannot_have_an_accessibility_modifier: diag(1018, ts.DiagnosticCategory.Error, "An_index_signature_parameter_cannot_have_an_accessibility_modifier_1018", "An index signature parameter cannot have an accessibility modifier."),
        An_index_signature_parameter_cannot_have_a_question_mark: diag(1019, ts.DiagnosticCategory.Error, "An_index_signature_parameter_cannot_have_a_question_mark_1019", "An index signature parameter cannot have a question mark."),
        An_index_signature_parameter_cannot_have_an_initializer: diag(1020, ts.DiagnosticCategory.Error, "An_index_signature_parameter_cannot_have_an_initializer_1020", "An index signature parameter cannot have an initializer."),
        An_index_signature_must_have_a_type_annotation: diag(1021, ts.DiagnosticCategory.Error, "An_index_signature_must_have_a_type_annotation_1021", "An index signature must have a type annotation."),
        An_index_signature_parameter_must_have_a_type_annotation: diag(1022, ts.DiagnosticCategory.Error, "An_index_signature_parameter_must_have_a_type_annotation_1022", "An index signature parameter must have a type annotation."),
        An_index_signature_parameter_type_must_be_string_or_number: diag(1023, ts.DiagnosticCategory.Error, "An_index_signature_parameter_type_must_be_string_or_number_1023", "An index signature parameter type must be 'string' or 'number'."),
        readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature: diag(1024, ts.DiagnosticCategory.Error, "readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature_1024", "'readonly' modifier can only appear on a property declaration or index signature."),
        Accessibility_modifier_already_seen: diag(1028, ts.DiagnosticCategory.Error, "Accessibility_modifier_already_seen_1028", "Accessibility modifier already seen."),
        _0_modifier_must_precede_1_modifier: diag(1029, ts.DiagnosticCategory.Error, "_0_modifier_must_precede_1_modifier_1029", "'{0}' modifier must precede '{1}' modifier."),
        _0_modifier_already_seen: diag(1030, ts.DiagnosticCategory.Error, "_0_modifier_already_seen_1030", "'{0}' modifier already seen."),
        _0_modifier_cannot_appear_on_a_class_element: diag(1031, ts.DiagnosticCategory.Error, "_0_modifier_cannot_appear_on_a_class_element_1031", "'{0}' modifier cannot appear on a class element."),
        super_must_be_followed_by_an_argument_list_or_member_access: diag(1034, ts.DiagnosticCategory.Error, "super_must_be_followed_by_an_argument_list_or_member_access_1034", "'super' must be followed by an argument list or member access."),
        Only_ambient_modules_can_use_quoted_names: diag(1035, ts.DiagnosticCategory.Error, "Only_ambient_modules_can_use_quoted_names_1035", "Only ambient modules can use quoted names."),
        Statements_are_not_allowed_in_ambient_contexts: diag(1036, ts.DiagnosticCategory.Error, "Statements_are_not_allowed_in_ambient_contexts_1036", "Statements are not allowed in ambient contexts."),
        A_declare_modifier_cannot_be_used_in_an_already_ambient_context: diag(1038, ts.DiagnosticCategory.Error, "A_declare_modifier_cannot_be_used_in_an_already_ambient_context_1038", "A 'declare' modifier cannot be used in an already ambient context."),
        Initializers_are_not_allowed_in_ambient_contexts: diag(1039, ts.DiagnosticCategory.Error, "Initializers_are_not_allowed_in_ambient_contexts_1039", "Initializers are not allowed in ambient contexts."),
        _0_modifier_cannot_be_used_in_an_ambient_context: diag(1040, ts.DiagnosticCategory.Error, "_0_modifier_cannot_be_used_in_an_ambient_context_1040", "'{0}' modifier cannot be used in an ambient context."),
        _0_modifier_cannot_be_used_with_a_class_declaration: diag(1041, ts.DiagnosticCategory.Error, "_0_modifier_cannot_be_used_with_a_class_declaration_1041", "'{0}' modifier cannot be used with a class declaration."),
        _0_modifier_cannot_be_used_here: diag(1042, ts.DiagnosticCategory.Error, "_0_modifier_cannot_be_used_here_1042", "'{0}' modifier cannot be used here."),
        _0_modifier_cannot_appear_on_a_data_property: diag(1043, ts.DiagnosticCategory.Error, "_0_modifier_cannot_appear_on_a_data_property_1043", "'{0}' modifier cannot appear on a data property."),
        _0_modifier_cannot_appear_on_a_module_or_namespace_element: diag(1044, ts.DiagnosticCategory.Error, "_0_modifier_cannot_appear_on_a_module_or_namespace_element_1044", "'{0}' modifier cannot appear on a module or namespace element."),
        A_0_modifier_cannot_be_used_with_an_interface_declaration: diag(1045, ts.DiagnosticCategory.Error, "A_0_modifier_cannot_be_used_with_an_interface_declaration_1045", "A '{0}' modifier cannot be used with an interface declaration."),
        A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file: diag(1046, ts.DiagnosticCategory.Error, "A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file_1046", "A 'declare' modifier is required for a top level declaration in a .d.ts file."),
        A_rest_parameter_cannot_be_optional: diag(1047, ts.DiagnosticCategory.Error, "A_rest_parameter_cannot_be_optional_1047", "A rest parameter cannot be optional."),
        A_rest_parameter_cannot_have_an_initializer: diag(1048, ts.DiagnosticCategory.Error, "A_rest_parameter_cannot_have_an_initializer_1048", "A rest parameter cannot have an initializer."),
        A_set_accessor_must_have_exactly_one_parameter: diag(1049, ts.DiagnosticCategory.Error, "A_set_accessor_must_have_exactly_one_parameter_1049", "A 'set' accessor must have exactly one parameter."),
        A_set_accessor_cannot_have_an_optional_parameter: diag(1051, ts.DiagnosticCategory.Error, "A_set_accessor_cannot_have_an_optional_parameter_1051", "A 'set' accessor cannot have an optional parameter."),
        A_set_accessor_parameter_cannot_have_an_initializer: diag(1052, ts.DiagnosticCategory.Error, "A_set_accessor_parameter_cannot_have_an_initializer_1052", "A 'set' accessor parameter cannot have an initializer."),
        A_set_accessor_cannot_have_rest_parameter: diag(1053, ts.DiagnosticCategory.Error, "A_set_accessor_cannot_have_rest_parameter_1053", "A 'set' accessor cannot have rest parameter."),
        A_get_accessor_cannot_have_parameters: diag(1054, ts.DiagnosticCategory.Error, "A_get_accessor_cannot_have_parameters_1054", "A 'get' accessor cannot have parameters."),
        Type_0_is_not_a_valid_async_function_return_type_in_ES5_SlashES3_because_it_does_not_refer_to_a_Promise_compatible_constructor_value: diag(1055, ts.DiagnosticCategory.Error, "Type_0_is_not_a_valid_async_function_return_type_in_ES5_SlashES3_because_it_does_not_refer_to_a_Prom_1055", "Type '{0}' is not a valid async function return type in ES5/ES3 because it does not refer to a Promise-compatible constructor value."),
        Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher: diag(1056, ts.DiagnosticCategory.Error, "Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher_1056", "Accessors are only available when targeting ECMAScript 5 and higher."),
        An_async_function_or_method_must_have_a_valid_awaitable_return_type: diag(1057, ts.DiagnosticCategory.Error, "An_async_function_or_method_must_have_a_valid_awaitable_return_type_1057", "An async function or method must have a valid awaitable return type."),
        The_return_type_of_an_async_function_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member: diag(1058, ts.DiagnosticCategory.Error, "The_return_type_of_an_async_function_must_either_be_a_valid_promise_or_must_not_contain_a_callable_t_1058", "The return type of an async function must either be a valid promise or must not contain a callable 'then' member."),
        A_promise_must_have_a_then_method: diag(1059, ts.DiagnosticCategory.Error, "A_promise_must_have_a_then_method_1059", "A promise must have a 'then' method."),
        The_first_parameter_of_the_then_method_of_a_promise_must_be_a_callback: diag(1060, ts.DiagnosticCategory.Error, "The_first_parameter_of_the_then_method_of_a_promise_must_be_a_callback_1060", "The first parameter of the 'then' method of a promise must be a callback."),
        Enum_member_must_have_initializer: diag(1061, ts.DiagnosticCategory.Error, "Enum_member_must_have_initializer_1061", "Enum member must have initializer."),
        Type_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method: diag(1062, ts.DiagnosticCategory.Error, "Type_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method_1062", "Type is referenced directly or indirectly in the fulfillment callback of its own 'then' method."),
        An_export_assignment_cannot_be_used_in_a_namespace: diag(1063, ts.DiagnosticCategory.Error, "An_export_assignment_cannot_be_used_in_a_namespace_1063", "An export assignment cannot be used in a namespace."),
        The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type: diag(1064, ts.DiagnosticCategory.Error, "The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type_1064", "The return type of an async function or method must be the global Promise<T> type."),
        In_ambient_enum_declarations_member_initializer_must_be_constant_expression: diag(1066, ts.DiagnosticCategory.Error, "In_ambient_enum_declarations_member_initializer_must_be_constant_expression_1066", "In ambient enum declarations member initializer must be constant expression."),
        Unexpected_token_A_constructor_method_accessor_or_property_was_expected: diag(1068, ts.DiagnosticCategory.Error, "Unexpected_token_A_constructor_method_accessor_or_property_was_expected_1068", "Unexpected token. A constructor, method, accessor, or property was expected."),
        Unexpected_token_A_type_parameter_name_was_expected_without_curly_braces: diag(1069, ts.DiagnosticCategory.Error, "Unexpected_token_A_type_parameter_name_was_expected_without_curly_braces_1069", "Unexpected token. A type parameter name was expected without curly braces."),
        _0_modifier_cannot_appear_on_a_type_member: diag(1070, ts.DiagnosticCategory.Error, "_0_modifier_cannot_appear_on_a_type_member_1070", "'{0}' modifier cannot appear on a type member."),
        _0_modifier_cannot_appear_on_an_index_signature: diag(1071, ts.DiagnosticCategory.Error, "_0_modifier_cannot_appear_on_an_index_signature_1071", "'{0}' modifier cannot appear on an index signature."),
        A_0_modifier_cannot_be_used_with_an_import_declaration: diag(1079, ts.DiagnosticCategory.Error, "A_0_modifier_cannot_be_used_with_an_import_declaration_1079", "A '{0}' modifier cannot be used with an import declaration."),
        Invalid_reference_directive_syntax: diag(1084, ts.DiagnosticCategory.Error, "Invalid_reference_directive_syntax_1084", "Invalid 'reference' directive syntax."),
        Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher_Use_the_syntax_0: diag(1085, ts.DiagnosticCategory.Error, "Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher_Use_the_syntax_0_1085", "Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '{0}'."),
        An_accessor_cannot_be_declared_in_an_ambient_context: diag(1086, ts.DiagnosticCategory.Error, "An_accessor_cannot_be_declared_in_an_ambient_context_1086", "An accessor cannot be declared in an ambient context."),
        _0_modifier_cannot_appear_on_a_constructor_declaration: diag(1089, ts.DiagnosticCategory.Error, "_0_modifier_cannot_appear_on_a_constructor_declaration_1089", "'{0}' modifier cannot appear on a constructor declaration."),
        _0_modifier_cannot_appear_on_a_parameter: diag(1090, ts.DiagnosticCategory.Error, "_0_modifier_cannot_appear_on_a_parameter_1090", "'{0}' modifier cannot appear on a parameter."),
        Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement: diag(1091, ts.DiagnosticCategory.Error, "Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement_1091", "Only a single variable declaration is allowed in a 'for...in' statement."),
        Type_parameters_cannot_appear_on_a_constructor_declaration: diag(1092, ts.DiagnosticCategory.Error, "Type_parameters_cannot_appear_on_a_constructor_declaration_1092", "Type parameters cannot appear on a constructor declaration."),
        Type_annotation_cannot_appear_on_a_constructor_declaration: diag(1093, ts.DiagnosticCategory.Error, "Type_annotation_cannot_appear_on_a_constructor_declaration_1093", "Type annotation cannot appear on a constructor declaration."),
        An_accessor_cannot_have_type_parameters: diag(1094, ts.DiagnosticCategory.Error, "An_accessor_cannot_have_type_parameters_1094", "An accessor cannot have type parameters."),
        A_set_accessor_cannot_have_a_return_type_annotation: diag(1095, ts.DiagnosticCategory.Error, "A_set_accessor_cannot_have_a_return_type_annotation_1095", "A 'set' accessor cannot have a return type annotation."),
        An_index_signature_must_have_exactly_one_parameter: diag(1096, ts.DiagnosticCategory.Error, "An_index_signature_must_have_exactly_one_parameter_1096", "An index signature must have exactly one parameter."),
        _0_list_cannot_be_empty: diag(1097, ts.DiagnosticCategory.Error, "_0_list_cannot_be_empty_1097", "'{0}' list cannot be empty."),
        Type_parameter_list_cannot_be_empty: diag(1098, ts.DiagnosticCategory.Error, "Type_parameter_list_cannot_be_empty_1098", "Type parameter list cannot be empty."),
        Type_argument_list_cannot_be_empty: diag(1099, ts.DiagnosticCategory.Error, "Type_argument_list_cannot_be_empty_1099", "Type argument list cannot be empty."),
        Invalid_use_of_0_in_strict_mode: diag(1100, ts.DiagnosticCategory.Error, "Invalid_use_of_0_in_strict_mode_1100", "Invalid use of '{0}' in strict mode."),
        with_statements_are_not_allowed_in_strict_mode: diag(1101, ts.DiagnosticCategory.Error, "with_statements_are_not_allowed_in_strict_mode_1101", "'with' statements are not allowed in strict mode."),
        delete_cannot_be_called_on_an_identifier_in_strict_mode: diag(1102, ts.DiagnosticCategory.Error, "delete_cannot_be_called_on_an_identifier_in_strict_mode_1102", "'delete' cannot be called on an identifier in strict mode."),
        A_for_await_of_statement_is_only_allowed_within_an_async_function_or_async_generator: diag(1103, ts.DiagnosticCategory.Error, "A_for_await_of_statement_is_only_allowed_within_an_async_function_or_async_generator_1103", "A 'for-await-of' statement is only allowed within an async function or async generator."),
        A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement: diag(1104, ts.DiagnosticCategory.Error, "A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement_1104", "A 'continue' statement can only be used within an enclosing iteration statement."),
        A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement: diag(1105, ts.DiagnosticCategory.Error, "A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement_1105", "A 'break' statement can only be used within an enclosing iteration or switch statement."),
        Jump_target_cannot_cross_function_boundary: diag(1107, ts.DiagnosticCategory.Error, "Jump_target_cannot_cross_function_boundary_1107", "Jump target cannot cross function boundary."),
        A_return_statement_can_only_be_used_within_a_function_body: diag(1108, ts.DiagnosticCategory.Error, "A_return_statement_can_only_be_used_within_a_function_body_1108", "A 'return' statement can only be used within a function body."),
        Expression_expected: diag(1109, ts.DiagnosticCategory.Error, "Expression_expected_1109", "Expression expected."),
        Type_expected: diag(1110, ts.DiagnosticCategory.Error, "Type_expected_1110", "Type expected."),
        A_default_clause_cannot_appear_more_than_once_in_a_switch_statement: diag(1113, ts.DiagnosticCategory.Error, "A_default_clause_cannot_appear_more_than_once_in_a_switch_statement_1113", "A 'default' clause cannot appear more than once in a 'switch' statement."),
        Duplicate_label_0: diag(1114, ts.DiagnosticCategory.Error, "Duplicate_label_0_1114", "Duplicate label '{0}'."),
        A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement: diag(1115, ts.DiagnosticCategory.Error, "A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement_1115", "A 'continue' statement can only jump to a label of an enclosing iteration statement."),
        A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement: diag(1116, ts.DiagnosticCategory.Error, "A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement_1116", "A 'break' statement can only jump to a label of an enclosing statement."),
        An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode: diag(1117, ts.DiagnosticCategory.Error, "An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode_1117", "An object literal cannot have multiple properties with the same name in strict mode."),
        An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name: diag(1118, ts.DiagnosticCategory.Error, "An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name_1118", "An object literal cannot have multiple get/set accessors with the same name."),
        An_object_literal_cannot_have_property_and_accessor_with_the_same_name: diag(1119, ts.DiagnosticCategory.Error, "An_object_literal_cannot_have_property_and_accessor_with_the_same_name_1119", "An object literal cannot have property and accessor with the same name."),
        An_export_assignment_cannot_have_modifiers: diag(1120, ts.DiagnosticCategory.Error, "An_export_assignment_cannot_have_modifiers_1120", "An export assignment cannot have modifiers."),
        Octal_literals_are_not_allowed_in_strict_mode: diag(1121, ts.DiagnosticCategory.Error, "Octal_literals_are_not_allowed_in_strict_mode_1121", "Octal literals are not allowed in strict mode."),
        A_tuple_type_element_list_cannot_be_empty: diag(1122, ts.DiagnosticCategory.Error, "A_tuple_type_element_list_cannot_be_empty_1122", "A tuple type element list cannot be empty."),
        Variable_declaration_list_cannot_be_empty: diag(1123, ts.DiagnosticCategory.Error, "Variable_declaration_list_cannot_be_empty_1123", "Variable declaration list cannot be empty."),
        Digit_expected: diag(1124, ts.DiagnosticCategory.Error, "Digit_expected_1124", "Digit expected."),
        Hexadecimal_digit_expected: diag(1125, ts.DiagnosticCategory.Error, "Hexadecimal_digit_expected_1125", "Hexadecimal digit expected."),
        Unexpected_end_of_text: diag(1126, ts.DiagnosticCategory.Error, "Unexpected_end_of_text_1126", "Unexpected end of text."),
        Invalid_character: diag(1127, ts.DiagnosticCategory.Error, "Invalid_character_1127", "Invalid character."),
        Declaration_or_statement_expected: diag(1128, ts.DiagnosticCategory.Error, "Declaration_or_statement_expected_1128", "Declaration or statement expected."),
        Statement_expected: diag(1129, ts.DiagnosticCategory.Error, "Statement_expected_1129", "Statement expected."),
        case_or_default_expected: diag(1130, ts.DiagnosticCategory.Error, "case_or_default_expected_1130", "'case' or 'default' expected."),
        Property_or_signature_expected: diag(1131, ts.DiagnosticCategory.Error, "Property_or_signature_expected_1131", "Property or signature expected."),
        Enum_member_expected: diag(1132, ts.DiagnosticCategory.Error, "Enum_member_expected_1132", "Enum member expected."),
        Variable_declaration_expected: diag(1134, ts.DiagnosticCategory.Error, "Variable_declaration_expected_1134", "Variable declaration expected."),
        Argument_expression_expected: diag(1135, ts.DiagnosticCategory.Error, "Argument_expression_expected_1135", "Argument expression expected."),
        Property_assignment_expected: diag(1136, ts.DiagnosticCategory.Error, "Property_assignment_expected_1136", "Property assignment expected."),
        Expression_or_comma_expected: diag(1137, ts.DiagnosticCategory.Error, "Expression_or_comma_expected_1137", "Expression or comma expected."),
        Parameter_declaration_expected: diag(1138, ts.DiagnosticCategory.Error, "Parameter_declaration_expected_1138", "Parameter declaration expected."),
        Type_parameter_declaration_expected: diag(1139, ts.DiagnosticCategory.Error, "Type_parameter_declaration_expected_1139", "Type parameter declaration expected."),
        Type_argument_expected: diag(1140, ts.DiagnosticCategory.Error, "Type_argument_expected_1140", "Type argument expected."),
        String_literal_expected: diag(1141, ts.DiagnosticCategory.Error, "String_literal_expected_1141", "String literal expected."),
        Line_break_not_permitted_here: diag(1142, ts.DiagnosticCategory.Error, "Line_break_not_permitted_here_1142", "Line break not permitted here."),
        or_expected: diag(1144, ts.DiagnosticCategory.Error, "or_expected_1144", "'{' or ';' expected."),
        Declaration_expected: diag(1146, ts.DiagnosticCategory.Error, "Declaration_expected_1146", "Declaration expected."),
        Import_declarations_in_a_namespace_cannot_reference_a_module: diag(1147, ts.DiagnosticCategory.Error, "Import_declarations_in_a_namespace_cannot_reference_a_module_1147", "Import declarations in a namespace cannot reference a module."),
        Cannot_use_imports_exports_or_module_augmentations_when_module_is_none: diag(1148, ts.DiagnosticCategory.Error, "Cannot_use_imports_exports_or_module_augmentations_when_module_is_none_1148", "Cannot use imports, exports, or module augmentations when '--module' is 'none'."),
        File_name_0_differs_from_already_included_file_name_1_only_in_casing: diag(1149, ts.DiagnosticCategory.Error, "File_name_0_differs_from_already_included_file_name_1_only_in_casing_1149", "File name '{0}' differs from already included file name '{1}' only in casing."),
        new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead: diag(1150, ts.DiagnosticCategory.Error, "new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead_1150", "'new T[]' cannot be used to create an array. Use 'new Array<T>()' instead."),
        const_declarations_must_be_initialized: diag(1155, ts.DiagnosticCategory.Error, "const_declarations_must_be_initialized_1155", "'const' declarations must be initialized."),
        const_declarations_can_only_be_declared_inside_a_block: diag(1156, ts.DiagnosticCategory.Error, "const_declarations_can_only_be_declared_inside_a_block_1156", "'const' declarations can only be declared inside a block."),
        let_declarations_can_only_be_declared_inside_a_block: diag(1157, ts.DiagnosticCategory.Error, "let_declarations_can_only_be_declared_inside_a_block_1157", "'let' declarations can only be declared inside a block."),
        Unterminated_template_literal: diag(1160, ts.DiagnosticCategory.Error, "Unterminated_template_literal_1160", "Unterminated template literal."),
        Unterminated_regular_expression_literal: diag(1161, ts.DiagnosticCategory.Error, "Unterminated_regular_expression_literal_1161", "Unterminated regular expression literal."),
        An_object_member_cannot_be_declared_optional: diag(1162, ts.DiagnosticCategory.Error, "An_object_member_cannot_be_declared_optional_1162", "An object member cannot be declared optional."),
        A_yield_expression_is_only_allowed_in_a_generator_body: diag(1163, ts.DiagnosticCategory.Error, "A_yield_expression_is_only_allowed_in_a_generator_body_1163", "A 'yield' expression is only allowed in a generator body."),
        Computed_property_names_are_not_allowed_in_enums: diag(1164, ts.DiagnosticCategory.Error, "Computed_property_names_are_not_allowed_in_enums_1164", "Computed property names are not allowed in enums."),
        A_computed_property_name_in_an_ambient_context_must_refer_to_an_expression_whose_type_is_a_literal_type_or_a_unique_symbol_type: diag(1165, ts.DiagnosticCategory.Error, "A_computed_property_name_in_an_ambient_context_must_refer_to_an_expression_whose_type_is_a_literal_t_1165", "A computed property name in an ambient context must refer to an expression whose type is a literal type or a 'unique symbol' type."),
        A_computed_property_name_in_a_class_property_declaration_must_refer_to_an_expression_whose_type_is_a_literal_type_or_a_unique_symbol_type: diag(1166, ts.DiagnosticCategory.Error, "A_computed_property_name_in_a_class_property_declaration_must_refer_to_an_expression_whose_type_is_a_1166", "A computed property name in a class property declaration must refer to an expression whose type is a literal type or a 'unique symbol' type."),
        A_computed_property_name_in_a_method_overload_must_refer_to_an_expression_whose_type_is_a_literal_type_or_a_unique_symbol_type: diag(1168, ts.DiagnosticCategory.Error, "A_computed_property_name_in_a_method_overload_must_refer_to_an_expression_whose_type_is_a_literal_ty_1168", "A computed property name in a method overload must refer to an expression whose type is a literal type or a 'unique symbol' type."),
        A_computed_property_name_in_an_interface_must_refer_to_an_expression_whose_type_is_a_literal_type_or_a_unique_symbol_type: diag(1169, ts.DiagnosticCategory.Error, "A_computed_property_name_in_an_interface_must_refer_to_an_expression_whose_type_is_a_literal_type_or_1169", "A computed property name in an interface must refer to an expression whose type is a literal type or a 'unique symbol' type."),
        A_computed_property_name_in_a_type_literal_must_refer_to_an_expression_whose_type_is_a_literal_type_or_a_unique_symbol_type: diag(1170, ts.DiagnosticCategory.Error, "A_computed_property_name_in_a_type_literal_must_refer_to_an_expression_whose_type_is_a_literal_type__1170", "A computed property name in a type literal must refer to an expression whose type is a literal type or a 'unique symbol' type."),
        A_comma_expression_is_not_allowed_in_a_computed_property_name: diag(1171, ts.DiagnosticCategory.Error, "A_comma_expression_is_not_allowed_in_a_computed_property_name_1171", "A comma expression is not allowed in a computed property name."),
        extends_clause_already_seen: diag(1172, ts.DiagnosticCategory.Error, "extends_clause_already_seen_1172", "'extends' clause already seen."),
        extends_clause_must_precede_implements_clause: diag(1173, ts.DiagnosticCategory.Error, "extends_clause_must_precede_implements_clause_1173", "'extends' clause must precede 'implements' clause."),
        Classes_can_only_extend_a_single_class: diag(1174, ts.DiagnosticCategory.Error, "Classes_can_only_extend_a_single_class_1174", "Classes can only extend a single class."),
        implements_clause_already_seen: diag(1175, ts.DiagnosticCategory.Error, "implements_clause_already_seen_1175", "'implements' clause already seen."),
        Interface_declaration_cannot_have_implements_clause: diag(1176, ts.DiagnosticCategory.Error, "Interface_declaration_cannot_have_implements_clause_1176", "Interface declaration cannot have 'implements' clause."),
        Binary_digit_expected: diag(1177, ts.DiagnosticCategory.Error, "Binary_digit_expected_1177", "Binary digit expected."),
        Octal_digit_expected: diag(1178, ts.DiagnosticCategory.Error, "Octal_digit_expected_1178", "Octal digit expected."),
        Unexpected_token_expected: diag(1179, ts.DiagnosticCategory.Error, "Unexpected_token_expected_1179", "Unexpected token. '{' expected."),
        Property_destructuring_pattern_expected: diag(1180, ts.DiagnosticCategory.Error, "Property_destructuring_pattern_expected_1180", "Property destructuring pattern expected."),
        Array_element_destructuring_pattern_expected: diag(1181, ts.DiagnosticCategory.Error, "Array_element_destructuring_pattern_expected_1181", "Array element destructuring pattern expected."),
        A_destructuring_declaration_must_have_an_initializer: diag(1182, ts.DiagnosticCategory.Error, "A_destructuring_declaration_must_have_an_initializer_1182", "A destructuring declaration must have an initializer."),
        An_implementation_cannot_be_declared_in_ambient_contexts: diag(1183, ts.DiagnosticCategory.Error, "An_implementation_cannot_be_declared_in_ambient_contexts_1183", "An implementation cannot be declared in ambient contexts."),
        Modifiers_cannot_appear_here: diag(1184, ts.DiagnosticCategory.Error, "Modifiers_cannot_appear_here_1184", "Modifiers cannot appear here."),
        Merge_conflict_marker_encountered: diag(1185, ts.DiagnosticCategory.Error, "Merge_conflict_marker_encountered_1185", "Merge conflict marker encountered."),
        A_rest_element_cannot_have_an_initializer: diag(1186, ts.DiagnosticCategory.Error, "A_rest_element_cannot_have_an_initializer_1186", "A rest element cannot have an initializer."),
        A_parameter_property_may_not_be_declared_using_a_binding_pattern: diag(1187, ts.DiagnosticCategory.Error, "A_parameter_property_may_not_be_declared_using_a_binding_pattern_1187", "A parameter property may not be declared using a binding pattern."),
        Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement: diag(1188, ts.DiagnosticCategory.Error, "Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement_1188", "Only a single variable declaration is allowed in a 'for...of' statement."),
        The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer: diag(1189, ts.DiagnosticCategory.Error, "The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer_1189", "The variable declaration of a 'for...in' statement cannot have an initializer."),
        The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer: diag(1190, ts.DiagnosticCategory.Error, "The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer_1190", "The variable declaration of a 'for...of' statement cannot have an initializer."),
        An_import_declaration_cannot_have_modifiers: diag(1191, ts.DiagnosticCategory.Error, "An_import_declaration_cannot_have_modifiers_1191", "An import declaration cannot have modifiers."),
        Module_0_has_no_default_export: diag(1192, ts.DiagnosticCategory.Error, "Module_0_has_no_default_export_1192", "Module '{0}' has no default export."),
        An_export_declaration_cannot_have_modifiers: diag(1193, ts.DiagnosticCategory.Error, "An_export_declaration_cannot_have_modifiers_1193", "An export declaration cannot have modifiers."),
        Export_declarations_are_not_permitted_in_a_namespace: diag(1194, ts.DiagnosticCategory.Error, "Export_declarations_are_not_permitted_in_a_namespace_1194", "Export declarations are not permitted in a namespace."),
        Catch_clause_variable_cannot_have_a_type_annotation: diag(1196, ts.DiagnosticCategory.Error, "Catch_clause_variable_cannot_have_a_type_annotation_1196", "Catch clause variable cannot have a type annotation."),
        Catch_clause_variable_cannot_have_an_initializer: diag(1197, ts.DiagnosticCategory.Error, "Catch_clause_variable_cannot_have_an_initializer_1197", "Catch clause variable cannot have an initializer."),
        An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive: diag(1198, ts.DiagnosticCategory.Error, "An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive_1198", "An extended Unicode escape value must be between 0x0 and 0x10FFFF inclusive."),
        Unterminated_Unicode_escape_sequence: diag(1199, ts.DiagnosticCategory.Error, "Unterminated_Unicode_escape_sequence_1199", "Unterminated Unicode escape sequence."),
        Line_terminator_not_permitted_before_arrow: diag(1200, ts.DiagnosticCategory.Error, "Line_terminator_not_permitted_before_arrow_1200", "Line terminator not permitted before arrow."),
        Import_assignment_cannot_be_used_when_targeting_ECMAScript_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead: diag(1202, ts.DiagnosticCategory.Error, "Import_assignment_cannot_be_used_when_targeting_ECMAScript_modules_Consider_using_import_Asterisk_as_1202", "Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from \"mod\"', 'import {a} from \"mod\"', 'import d from \"mod\"', or another module format instead."),
        Export_assignment_cannot_be_used_when_targeting_ECMAScript_modules_Consider_using_export_default_or_another_module_format_instead: diag(1203, ts.DiagnosticCategory.Error, "Export_assignment_cannot_be_used_when_targeting_ECMAScript_modules_Consider_using_export_default_or__1203", "Export assignment cannot be used when targeting ECMAScript modules. Consider using 'export default' or another module format instead."),
        Cannot_re_export_a_type_when_the_isolatedModules_flag_is_provided: diag(1205, ts.DiagnosticCategory.Error, "Cannot_re_export_a_type_when_the_isolatedModules_flag_is_provided_1205", "Cannot re-export a type when the '--isolatedModules' flag is provided."),
        Decorators_are_not_valid_here: diag(1206, ts.DiagnosticCategory.Error, "Decorators_are_not_valid_here_1206", "Decorators are not valid here."),
        Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name: diag(1207, ts.DiagnosticCategory.Error, "Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name_1207", "Decorators cannot be applied to multiple get/set accessors of the same name."),
        Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided: diag(1208, ts.DiagnosticCategory.Error, "Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided_1208", "Cannot compile namespaces when the '--isolatedModules' flag is provided."),
        Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided: diag(1209, ts.DiagnosticCategory.Error, "Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided_1209", "Ambient const enums are not allowed when the '--isolatedModules' flag is provided."),
        Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode: diag(1210, ts.DiagnosticCategory.Error, "Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode_1210", "Invalid use of '{0}'. Class definitions are automatically in strict mode."),
        A_class_declaration_without_the_default_modifier_must_have_a_name: diag(1211, ts.DiagnosticCategory.Error, "A_class_declaration_without_the_default_modifier_must_have_a_name_1211", "A class declaration without the 'default' modifier must have a name."),
        Identifier_expected_0_is_a_reserved_word_in_strict_mode: diag(1212, ts.DiagnosticCategory.Error, "Identifier_expected_0_is_a_reserved_word_in_strict_mode_1212", "Identifier expected. '{0}' is a reserved word in strict mode."),
        Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_strict_mode: diag(1213, ts.DiagnosticCategory.Error, "Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_stric_1213", "Identifier expected. '{0}' is a reserved word in strict mode. Class definitions are automatically in strict mode."),
        Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode: diag(1214, ts.DiagnosticCategory.Error, "Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode_1214", "Identifier expected. '{0}' is a reserved word in strict mode. Modules are automatically in strict mode."),
        Invalid_use_of_0_Modules_are_automatically_in_strict_mode: diag(1215, ts.DiagnosticCategory.Error, "Invalid_use_of_0_Modules_are_automatically_in_strict_mode_1215", "Invalid use of '{0}'. Modules are automatically in strict mode."),
        Identifier_expected_esModule_is_reserved_as_an_exported_marker_when_transforming_ECMAScript_modules: diag(1216, ts.DiagnosticCategory.Error, "Identifier_expected_esModule_is_reserved_as_an_exported_marker_when_transforming_ECMAScript_modules_1216", "Identifier expected. '__esModule' is reserved as an exported marker when transforming ECMAScript modules."),
        Export_assignment_is_not_supported_when_module_flag_is_system: diag(1218, ts.DiagnosticCategory.Error, "Export_assignment_is_not_supported_when_module_flag_is_system_1218", "Export assignment is not supported when '--module' flag is 'system'."),
        Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning: diag(1219, ts.DiagnosticCategory.Error, "Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_t_1219", "Experimental support for decorators is a feature that is subject to change in a future release. Set the 'experimentalDecorators' option to remove this warning."),
        Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher: diag(1220, ts.DiagnosticCategory.Error, "Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher_1220", "Generators are only available when targeting ECMAScript 2015 or higher."),
        Generators_are_not_allowed_in_an_ambient_context: diag(1221, ts.DiagnosticCategory.Error, "Generators_are_not_allowed_in_an_ambient_context_1221", "Generators are not allowed in an ambient context."),
        An_overload_signature_cannot_be_declared_as_a_generator: diag(1222, ts.DiagnosticCategory.Error, "An_overload_signature_cannot_be_declared_as_a_generator_1222", "An overload signature cannot be declared as a generator."),
        _0_tag_already_specified: diag(1223, ts.DiagnosticCategory.Error, "_0_tag_already_specified_1223", "'{0}' tag already specified."),
        Signature_0_must_be_a_type_predicate: diag(1224, ts.DiagnosticCategory.Error, "Signature_0_must_be_a_type_predicate_1224", "Signature '{0}' must be a type predicate."),
        Cannot_find_parameter_0: diag(1225, ts.DiagnosticCategory.Error, "Cannot_find_parameter_0_1225", "Cannot find parameter '{0}'."),
        Type_predicate_0_is_not_assignable_to_1: diag(1226, ts.DiagnosticCategory.Error, "Type_predicate_0_is_not_assignable_to_1_1226", "Type predicate '{0}' is not assignable to '{1}'."),
        Parameter_0_is_not_in_the_same_position_as_parameter_1: diag(1227, ts.DiagnosticCategory.Error, "Parameter_0_is_not_in_the_same_position_as_parameter_1_1227", "Parameter '{0}' is not in the same position as parameter '{1}'."),
        A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods: diag(1228, ts.DiagnosticCategory.Error, "A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods_1228", "A type predicate is only allowed in return type position for functions and methods."),
        A_type_predicate_cannot_reference_a_rest_parameter: diag(1229, ts.DiagnosticCategory.Error, "A_type_predicate_cannot_reference_a_rest_parameter_1229", "A type predicate cannot reference a rest parameter."),
        A_type_predicate_cannot_reference_element_0_in_a_binding_pattern: diag(1230, ts.DiagnosticCategory.Error, "A_type_predicate_cannot_reference_element_0_in_a_binding_pattern_1230", "A type predicate cannot reference element '{0}' in a binding pattern."),
        An_export_assignment_can_only_be_used_in_a_module: diag(1231, ts.DiagnosticCategory.Error, "An_export_assignment_can_only_be_used_in_a_module_1231", "An export assignment can only be used in a module."),
        An_import_declaration_can_only_be_used_in_a_namespace_or_module: diag(1232, ts.DiagnosticCategory.Error, "An_import_declaration_can_only_be_used_in_a_namespace_or_module_1232", "An import declaration can only be used in a namespace or module."),
        An_export_declaration_can_only_be_used_in_a_module: diag(1233, ts.DiagnosticCategory.Error, "An_export_declaration_can_only_be_used_in_a_module_1233", "An export declaration can only be used in a module."),
        An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file: diag(1234, ts.DiagnosticCategory.Error, "An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file_1234", "An ambient module declaration is only allowed at the top level in a file."),
        A_namespace_declaration_is_only_allowed_in_a_namespace_or_module: diag(1235, ts.DiagnosticCategory.Error, "A_namespace_declaration_is_only_allowed_in_a_namespace_or_module_1235", "A namespace declaration is only allowed in a namespace or module."),
        The_return_type_of_a_property_decorator_function_must_be_either_void_or_any: diag(1236, ts.DiagnosticCategory.Error, "The_return_type_of_a_property_decorator_function_must_be_either_void_or_any_1236", "The return type of a property decorator function must be either 'void' or 'any'."),
        The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any: diag(1237, ts.DiagnosticCategory.Error, "The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any_1237", "The return type of a parameter decorator function must be either 'void' or 'any'."),
        Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression: diag(1238, ts.DiagnosticCategory.Error, "Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression_1238", "Unable to resolve signature of class decorator when called as an expression."),
        Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression: diag(1239, ts.DiagnosticCategory.Error, "Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression_1239", "Unable to resolve signature of parameter decorator when called as an expression."),
        Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression: diag(1240, ts.DiagnosticCategory.Error, "Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression_1240", "Unable to resolve signature of property decorator when called as an expression."),
        Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression: diag(1241, ts.DiagnosticCategory.Error, "Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression_1241", "Unable to resolve signature of method decorator when called as an expression."),
        abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration: diag(1242, ts.DiagnosticCategory.Error, "abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration_1242", "'abstract' modifier can only appear on a class, method, or property declaration."),
        _0_modifier_cannot_be_used_with_1_modifier: diag(1243, ts.DiagnosticCategory.Error, "_0_modifier_cannot_be_used_with_1_modifier_1243", "'{0}' modifier cannot be used with '{1}' modifier."),
        Abstract_methods_can_only_appear_within_an_abstract_class: diag(1244, ts.DiagnosticCategory.Error, "Abstract_methods_can_only_appear_within_an_abstract_class_1244", "Abstract methods can only appear within an abstract class."),
        Method_0_cannot_have_an_implementation_because_it_is_marked_abstract: diag(1245, ts.DiagnosticCategory.Error, "Method_0_cannot_have_an_implementation_because_it_is_marked_abstract_1245", "Method '{0}' cannot have an implementation because it is marked abstract."),
        An_interface_property_cannot_have_an_initializer: diag(1246, ts.DiagnosticCategory.Error, "An_interface_property_cannot_have_an_initializer_1246", "An interface property cannot have an initializer."),
        A_type_literal_property_cannot_have_an_initializer: diag(1247, ts.DiagnosticCategory.Error, "A_type_literal_property_cannot_have_an_initializer_1247", "A type literal property cannot have an initializer."),
        A_class_member_cannot_have_the_0_keyword: diag(1248, ts.DiagnosticCategory.Error, "A_class_member_cannot_have_the_0_keyword_1248", "A class member cannot have the '{0}' keyword."),
        A_decorator_can_only_decorate_a_method_implementation_not_an_overload: diag(1249, ts.DiagnosticCategory.Error, "A_decorator_can_only_decorate_a_method_implementation_not_an_overload_1249", "A decorator can only decorate a method implementation, not an overload."),
        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5: diag(1250, ts.DiagnosticCategory.Error, "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_1250", "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'."),
        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_definitions_are_automatically_in_strict_mode: diag(1251, ts.DiagnosticCategory.Error, "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_d_1251", "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'. Class definitions are automatically in strict mode."),
        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_are_automatically_in_strict_mode: diag(1252, ts.DiagnosticCategory.Error, "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_1252", "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'. Modules are automatically in strict mode."),
        _0_tag_cannot_be_used_independently_as_a_top_level_JSDoc_tag: diag(1253, ts.DiagnosticCategory.Error, "_0_tag_cannot_be_used_independently_as_a_top_level_JSDoc_tag_1253", "'{0}' tag cannot be used independently as a top level JSDoc tag."),
        A_const_initializer_in_an_ambient_context_must_be_a_string_or_numeric_literal: diag(1254, ts.DiagnosticCategory.Error, "A_const_initializer_in_an_ambient_context_must_be_a_string_or_numeric_literal_1254", "A 'const' initializer in an ambient context must be a string or numeric literal."),
        A_definite_assignment_assertion_is_not_permitted_in_this_context: diag(1255, ts.DiagnosticCategory.Error, "A_definite_assignment_assertion_is_not_permitted_in_this_context_1255", "A definite assignment assertion '!' is not permitted in this context."),
        with_statements_are_not_allowed_in_an_async_function_block: diag(1300, ts.DiagnosticCategory.Error, "with_statements_are_not_allowed_in_an_async_function_block_1300", "'with' statements are not allowed in an async function block."),
        await_expression_is_only_allowed_within_an_async_function: diag(1308, ts.DiagnosticCategory.Error, "await_expression_is_only_allowed_within_an_async_function_1308", "'await' expression is only allowed within an async function."),
        can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment: diag(1312, ts.DiagnosticCategory.Error, "can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment_1312", "'=' can only be used in an object literal property inside a destructuring assignment."),
        The_body_of_an_if_statement_cannot_be_the_empty_statement: diag(1313, ts.DiagnosticCategory.Error, "The_body_of_an_if_statement_cannot_be_the_empty_statement_1313", "The body of an 'if' statement cannot be the empty statement."),
        Global_module_exports_may_only_appear_in_module_files: diag(1314, ts.DiagnosticCategory.Error, "Global_module_exports_may_only_appear_in_module_files_1314", "Global module exports may only appear in module files."),
        Global_module_exports_may_only_appear_in_declaration_files: diag(1315, ts.DiagnosticCategory.Error, "Global_module_exports_may_only_appear_in_declaration_files_1315", "Global module exports may only appear in declaration files."),
        Global_module_exports_may_only_appear_at_top_level: diag(1316, ts.DiagnosticCategory.Error, "Global_module_exports_may_only_appear_at_top_level_1316", "Global module exports may only appear at top level."),
        A_parameter_property_cannot_be_declared_using_a_rest_parameter: diag(1317, ts.DiagnosticCategory.Error, "A_parameter_property_cannot_be_declared_using_a_rest_parameter_1317", "A parameter property cannot be declared using a rest parameter."),
        An_abstract_accessor_cannot_have_an_implementation: diag(1318, ts.DiagnosticCategory.Error, "An_abstract_accessor_cannot_have_an_implementation_1318", "An abstract accessor cannot have an implementation."),
        A_default_export_can_only_be_used_in_an_ECMAScript_style_module: diag(1319, ts.DiagnosticCategory.Error, "A_default_export_can_only_be_used_in_an_ECMAScript_style_module_1319", "A default export can only be used in an ECMAScript-style module."),
        Type_of_await_operand_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member: diag(1320, ts.DiagnosticCategory.Error, "Type_of_await_operand_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member_1320", "Type of 'await' operand must either be a valid promise or must not contain a callable 'then' member."),
        Type_of_yield_operand_in_an_async_generator_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member: diag(1321, ts.DiagnosticCategory.Error, "Type_of_yield_operand_in_an_async_generator_must_either_be_a_valid_promise_or_must_not_contain_a_cal_1321", "Type of 'yield' operand in an async generator must either be a valid promise or must not contain a callable 'then' member."),
        Type_of_iterated_elements_of_a_yield_Asterisk_operand_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member: diag(1322, ts.DiagnosticCategory.Error, "Type_of_iterated_elements_of_a_yield_Asterisk_operand_must_either_be_a_valid_promise_or_must_not_con_1322", "Type of iterated elements of a 'yield*' operand must either be a valid promise or must not contain a callable 'then' member."),
        Dynamic_import_is_only_supported_when_module_flag_is_commonjs_or_esNext: diag(1323, ts.DiagnosticCategory.Error, "Dynamic_import_is_only_supported_when_module_flag_is_commonjs_or_esNext_1323", "Dynamic import is only supported when '--module' flag is 'commonjs' or 'esNext'."),
        Dynamic_import_must_have_one_specifier_as_an_argument: diag(1324, ts.DiagnosticCategory.Error, "Dynamic_import_must_have_one_specifier_as_an_argument_1324", "Dynamic import must have one specifier as an argument."),
        Specifier_of_dynamic_import_cannot_be_spread_element: diag(1325, ts.DiagnosticCategory.Error, "Specifier_of_dynamic_import_cannot_be_spread_element_1325", "Specifier of dynamic import cannot be spread element."),
        Dynamic_import_cannot_have_type_arguments: diag(1326, ts.DiagnosticCategory.Error, "Dynamic_import_cannot_have_type_arguments_1326", "Dynamic import cannot have type arguments"),
        String_literal_with_double_quotes_expected: diag(1327, ts.DiagnosticCategory.Error, "String_literal_with_double_quotes_expected_1327", "String literal with double quotes expected."),
        Property_value_can_only_be_string_literal_numeric_literal_true_false_null_object_literal_or_array_literal: diag(1328, ts.DiagnosticCategory.Error, "Property_value_can_only_be_string_literal_numeric_literal_true_false_null_object_literal_or_array_li_1328", "Property value can only be string literal, numeric literal, 'true', 'false', 'null', object literal or array literal."),
        _0_accepts_too_few_arguments_to_be_used_as_a_decorator_here_Did_you_mean_to_call_it_first_and_write_0: diag(1329, ts.DiagnosticCategory.Error, "_0_accepts_too_few_arguments_to_be_used_as_a_decorator_here_Did_you_mean_to_call_it_first_and_write__1329", "'{0}' accepts too few arguments to be used as a decorator here. Did you mean to call it first and write '@{0}()'?"),
        A_property_of_an_interface_or_type_literal_whose_type_is_a_unique_symbol_type_must_be_readonly: diag(1330, ts.DiagnosticCategory.Error, "A_property_of_an_interface_or_type_literal_whose_type_is_a_unique_symbol_type_must_be_readonly_1330", "A property of an interface or type literal whose type is a 'unique symbol' type must be 'readonly'."),
        A_property_of_a_class_whose_type_is_a_unique_symbol_type_must_be_both_static_and_readonly: diag(1331, ts.DiagnosticCategory.Error, "A_property_of_a_class_whose_type_is_a_unique_symbol_type_must_be_both_static_and_readonly_1331", "A property of a class whose type is a 'unique symbol' type must be both 'static' and 'readonly'."),
        A_variable_whose_type_is_a_unique_symbol_type_must_be_const: diag(1332, ts.DiagnosticCategory.Error, "A_variable_whose_type_is_a_unique_symbol_type_must_be_const_1332", "A variable whose type is a 'unique symbol' type must be 'const'."),
        unique_symbol_types_may_not_be_used_on_a_variable_declaration_with_a_binding_name: diag(1333, ts.DiagnosticCategory.Error, "unique_symbol_types_may_not_be_used_on_a_variable_declaration_with_a_binding_name_1333", "'unique symbol' types may not be used on a variable declaration with a binding name."),
        unique_symbol_types_are_only_allowed_on_variables_in_a_variable_statement: diag(1334, ts.DiagnosticCategory.Error, "unique_symbol_types_are_only_allowed_on_variables_in_a_variable_statement_1334", "'unique symbol' types are only allowed on variables in a variable statement."),
        unique_symbol_types_are_not_allowed_here: diag(1335, ts.DiagnosticCategory.Error, "unique_symbol_types_are_not_allowed_here_1335", "'unique symbol' types are not allowed here."),
        An_index_signature_parameter_type_cannot_be_a_type_alias_Consider_writing_0_Colon_1_Colon_2_instead: diag(1336, ts.DiagnosticCategory.Error, "An_index_signature_parameter_type_cannot_be_a_type_alias_Consider_writing_0_Colon_1_Colon_2_instead_1336", "An index signature parameter type cannot be a type alias. Consider writing '[{0}: {1}]: {2}' instead."),
        An_index_signature_parameter_type_cannot_be_a_union_type_Consider_using_a_mapped_object_type_instead: diag(1337, ts.DiagnosticCategory.Error, "An_index_signature_parameter_type_cannot_be_a_union_type_Consider_using_a_mapped_object_type_instead_1337", "An index signature parameter type cannot be a union type. Consider using a mapped object type instead."),
        infer_declarations_are_only_permitted_in_the_extends_clause_of_a_conditional_type: diag(1338, ts.DiagnosticCategory.Error, "infer_declarations_are_only_permitted_in_the_extends_clause_of_a_conditional_type_1338", "'infer' declarations are only permitted in the 'extends' clause of a conditional type."),
        Module_0_does_not_refer_to_a_value_but_is_used_as_a_value_here: diag(1339, ts.DiagnosticCategory.Error, "Module_0_does_not_refer_to_a_value_but_is_used_as_a_value_here_1339", "Module '{0}' does not refer to a value, but is used as a value here."),
        Module_0_does_not_refer_to_a_type_but_is_used_as_a_type_here: diag(1340, ts.DiagnosticCategory.Error, "Module_0_does_not_refer_to_a_type_but_is_used_as_a_type_here_1340", "Module '{0}' does not refer to a type, but is used as a type here."),
        Type_arguments_cannot_be_used_here: diag(1342, ts.DiagnosticCategory.Error, "Type_arguments_cannot_be_used_here_1342", "Type arguments cannot be used here."),
        The_import_meta_meta_property_is_only_allowed_using_ESNext_for_the_target_and_module_compiler_options: diag(1343, ts.DiagnosticCategory.Error, "The_import_meta_meta_property_is_only_allowed_using_ESNext_for_the_target_and_module_compiler_option_1343", "The 'import.meta' meta-property is only allowed using 'ESNext' for the 'target' and 'module' compiler options."),
        Duplicate_identifier_0: diag(2300, ts.DiagnosticCategory.Error, "Duplicate_identifier_0_2300", "Duplicate identifier '{0}'."),
        Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor: diag(2301, ts.DiagnosticCategory.Error, "Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor_2301", "Initializer of instance member variable '{0}' cannot reference identifier '{1}' declared in the constructor."),
        Static_members_cannot_reference_class_type_parameters: diag(2302, ts.DiagnosticCategory.Error, "Static_members_cannot_reference_class_type_parameters_2302", "Static members cannot reference class type parameters."),
        Circular_definition_of_import_alias_0: diag(2303, ts.DiagnosticCategory.Error, "Circular_definition_of_import_alias_0_2303", "Circular definition of import alias '{0}'."),
        Cannot_find_name_0: diag(2304, ts.DiagnosticCategory.Error, "Cannot_find_name_0_2304", "Cannot find name '{0}'."),
        Module_0_has_no_exported_member_1: diag(2305, ts.DiagnosticCategory.Error, "Module_0_has_no_exported_member_1_2305", "Module '{0}' has no exported member '{1}'."),
        File_0_is_not_a_module: diag(2306, ts.DiagnosticCategory.Error, "File_0_is_not_a_module_2306", "File '{0}' is not a module."),
        Cannot_find_module_0: diag(2307, ts.DiagnosticCategory.Error, "Cannot_find_module_0_2307", "Cannot find module '{0}'."),
        Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambiguity: diag(2308, ts.DiagnosticCategory.Error, "Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambig_2308", "Module {0} has already exported a member named '{1}'. Consider explicitly re-exporting to resolve the ambiguity."),
        An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements: diag(2309, ts.DiagnosticCategory.Error, "An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements_2309", "An export assignment cannot be used in a module with other exported elements."),
        Type_0_recursively_references_itself_as_a_base_type: diag(2310, ts.DiagnosticCategory.Error, "Type_0_recursively_references_itself_as_a_base_type_2310", "Type '{0}' recursively references itself as a base type."),
        A_class_may_only_extend_another_class: diag(2311, ts.DiagnosticCategory.Error, "A_class_may_only_extend_another_class_2311", "A class may only extend another class."),
        An_interface_may_only_extend_a_class_or_another_interface: diag(2312, ts.DiagnosticCategory.Error, "An_interface_may_only_extend_a_class_or_another_interface_2312", "An interface may only extend a class or another interface."),
        Type_parameter_0_has_a_circular_constraint: diag(2313, ts.DiagnosticCategory.Error, "Type_parameter_0_has_a_circular_constraint_2313", "Type parameter '{0}' has a circular constraint."),
        Generic_type_0_requires_1_type_argument_s: diag(2314, ts.DiagnosticCategory.Error, "Generic_type_0_requires_1_type_argument_s_2314", "Generic type '{0}' requires {1} type argument(s)."),
        Type_0_is_not_generic: diag(2315, ts.DiagnosticCategory.Error, "Type_0_is_not_generic_2315", "Type '{0}' is not generic."),
        Global_type_0_must_be_a_class_or_interface_type: diag(2316, ts.DiagnosticCategory.Error, "Global_type_0_must_be_a_class_or_interface_type_2316", "Global type '{0}' must be a class or interface type."),
        Global_type_0_must_have_1_type_parameter_s: diag(2317, ts.DiagnosticCategory.Error, "Global_type_0_must_have_1_type_parameter_s_2317", "Global type '{0}' must have {1} type parameter(s)."),
        Cannot_find_global_type_0: diag(2318, ts.DiagnosticCategory.Error, "Cannot_find_global_type_0_2318", "Cannot find global type '{0}'."),
        Named_property_0_of_types_1_and_2_are_not_identical: diag(2319, ts.DiagnosticCategory.Error, "Named_property_0_of_types_1_and_2_are_not_identical_2319", "Named property '{0}' of types '{1}' and '{2}' are not identical."),
        Interface_0_cannot_simultaneously_extend_types_1_and_2: diag(2320, ts.DiagnosticCategory.Error, "Interface_0_cannot_simultaneously_extend_types_1_and_2_2320", "Interface '{0}' cannot simultaneously extend types '{1}' and '{2}'."),
        Excessive_stack_depth_comparing_types_0_and_1: diag(2321, ts.DiagnosticCategory.Error, "Excessive_stack_depth_comparing_types_0_and_1_2321", "Excessive stack depth comparing types '{0}' and '{1}'."),
        Type_0_is_not_assignable_to_type_1: diag(2322, ts.DiagnosticCategory.Error, "Type_0_is_not_assignable_to_type_1_2322", "Type '{0}' is not assignable to type '{1}'."),
        Cannot_redeclare_exported_variable_0: diag(2323, ts.DiagnosticCategory.Error, "Cannot_redeclare_exported_variable_0_2323", "Cannot redeclare exported variable '{0}'."),
        Property_0_is_missing_in_type_1: diag(2324, ts.DiagnosticCategory.Error, "Property_0_is_missing_in_type_1_2324", "Property '{0}' is missing in type '{1}'."),
        Property_0_is_private_in_type_1_but_not_in_type_2: diag(2325, ts.DiagnosticCategory.Error, "Property_0_is_private_in_type_1_but_not_in_type_2_2325", "Property '{0}' is private in type '{1}' but not in type '{2}'."),
        Types_of_property_0_are_incompatible: diag(2326, ts.DiagnosticCategory.Error, "Types_of_property_0_are_incompatible_2326", "Types of property '{0}' are incompatible."),
        Property_0_is_optional_in_type_1_but_required_in_type_2: diag(2327, ts.DiagnosticCategory.Error, "Property_0_is_optional_in_type_1_but_required_in_type_2_2327", "Property '{0}' is optional in type '{1}' but required in type '{2}'."),
        Types_of_parameters_0_and_1_are_incompatible: diag(2328, ts.DiagnosticCategory.Error, "Types_of_parameters_0_and_1_are_incompatible_2328", "Types of parameters '{0}' and '{1}' are incompatible."),
        Index_signature_is_missing_in_type_0: diag(2329, ts.DiagnosticCategory.Error, "Index_signature_is_missing_in_type_0_2329", "Index signature is missing in type '{0}'."),
        Index_signatures_are_incompatible: diag(2330, ts.DiagnosticCategory.Error, "Index_signatures_are_incompatible_2330", "Index signatures are incompatible."),
        this_cannot_be_referenced_in_a_module_or_namespace_body: diag(2331, ts.DiagnosticCategory.Error, "this_cannot_be_referenced_in_a_module_or_namespace_body_2331", "'this' cannot be referenced in a module or namespace body."),
        this_cannot_be_referenced_in_current_location: diag(2332, ts.DiagnosticCategory.Error, "this_cannot_be_referenced_in_current_location_2332", "'this' cannot be referenced in current location."),
        this_cannot_be_referenced_in_constructor_arguments: diag(2333, ts.DiagnosticCategory.Error, "this_cannot_be_referenced_in_constructor_arguments_2333", "'this' cannot be referenced in constructor arguments."),
        this_cannot_be_referenced_in_a_static_property_initializer: diag(2334, ts.DiagnosticCategory.Error, "this_cannot_be_referenced_in_a_static_property_initializer_2334", "'this' cannot be referenced in a static property initializer."),
        super_can_only_be_referenced_in_a_derived_class: diag(2335, ts.DiagnosticCategory.Error, "super_can_only_be_referenced_in_a_derived_class_2335", "'super' can only be referenced in a derived class."),
        super_cannot_be_referenced_in_constructor_arguments: diag(2336, ts.DiagnosticCategory.Error, "super_cannot_be_referenced_in_constructor_arguments_2336", "'super' cannot be referenced in constructor arguments."),
        Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors: diag(2337, ts.DiagnosticCategory.Error, "Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors_2337", "Super calls are not permitted outside constructors or in nested functions inside constructors."),
        super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_derived_class: diag(2338, ts.DiagnosticCategory.Error, "super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_der_2338", "'super' property access is permitted only in a constructor, member function, or member accessor of a derived class."),
        Property_0_does_not_exist_on_type_1: diag(2339, ts.DiagnosticCategory.Error, "Property_0_does_not_exist_on_type_1_2339", "Property '{0}' does not exist on type '{1}'."),
        Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword: diag(2340, ts.DiagnosticCategory.Error, "Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword_2340", "Only public and protected methods of the base class are accessible via the 'super' keyword."),
        Property_0_is_private_and_only_accessible_within_class_1: diag(2341, ts.DiagnosticCategory.Error, "Property_0_is_private_and_only_accessible_within_class_1_2341", "Property '{0}' is private and only accessible within class '{1}'."),
        An_index_expression_argument_must_be_of_type_string_number_symbol_or_any: diag(2342, ts.DiagnosticCategory.Error, "An_index_expression_argument_must_be_of_type_string_number_symbol_or_any_2342", "An index expression argument must be of type 'string', 'number', 'symbol', or 'any'."),
        This_syntax_requires_an_imported_helper_named_1_but_module_0_has_no_exported_member_1: diag(2343, ts.DiagnosticCategory.Error, "This_syntax_requires_an_imported_helper_named_1_but_module_0_has_no_exported_member_1_2343", "This syntax requires an imported helper named '{1}', but module '{0}' has no exported member '{1}'."),
        Type_0_does_not_satisfy_the_constraint_1: diag(2344, ts.DiagnosticCategory.Error, "Type_0_does_not_satisfy_the_constraint_1_2344", "Type '{0}' does not satisfy the constraint '{1}'."),
        Argument_of_type_0_is_not_assignable_to_parameter_of_type_1: diag(2345, ts.DiagnosticCategory.Error, "Argument_of_type_0_is_not_assignable_to_parameter_of_type_1_2345", "Argument of type '{0}' is not assignable to parameter of type '{1}'."),
        Call_target_does_not_contain_any_signatures: diag(2346, ts.DiagnosticCategory.Error, "Call_target_does_not_contain_any_signatures_2346", "Call target does not contain any signatures."),
        Untyped_function_calls_may_not_accept_type_arguments: diag(2347, ts.DiagnosticCategory.Error, "Untyped_function_calls_may_not_accept_type_arguments_2347", "Untyped function calls may not accept type arguments."),
        Value_of_type_0_is_not_callable_Did_you_mean_to_include_new: diag(2348, ts.DiagnosticCategory.Error, "Value_of_type_0_is_not_callable_Did_you_mean_to_include_new_2348", "Value of type '{0}' is not callable. Did you mean to include 'new'?"),
        Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures: diag(2349, ts.DiagnosticCategory.Error, "Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatur_2349", "Cannot invoke an expression whose type lacks a call signature. Type '{0}' has no compatible call signatures."),
        Only_a_void_function_can_be_called_with_the_new_keyword: diag(2350, ts.DiagnosticCategory.Error, "Only_a_void_function_can_be_called_with_the_new_keyword_2350", "Only a void function can be called with the 'new' keyword."),
        Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature: diag(2351, ts.DiagnosticCategory.Error, "Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature_2351", "Cannot use 'new' with an expression whose type lacks a call or construct signature."),
        Type_0_cannot_be_converted_to_type_1: diag(2352, ts.DiagnosticCategory.Error, "Type_0_cannot_be_converted_to_type_1_2352", "Type '{0}' cannot be converted to type '{1}'."),
        Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1: diag(2353, ts.DiagnosticCategory.Error, "Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1_2353", "Object literal may only specify known properties, and '{0}' does not exist in type '{1}'."),
        This_syntax_requires_an_imported_helper_but_module_0_cannot_be_found: diag(2354, ts.DiagnosticCategory.Error, "This_syntax_requires_an_imported_helper_but_module_0_cannot_be_found_2354", "This syntax requires an imported helper but module '{0}' cannot be found."),
        A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value: diag(2355, ts.DiagnosticCategory.Error, "A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value_2355", "A function whose declared type is neither 'void' nor 'any' must return a value."),
        An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type: diag(2356, ts.DiagnosticCategory.Error, "An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type_2356", "An arithmetic operand must be of type 'any', 'number' or an enum type."),
        The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_or_a_property_access: diag(2357, ts.DiagnosticCategory.Error, "The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_or_a_property_access_2357", "The operand of an increment or decrement operator must be a variable or a property access."),
        The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_parameter: diag(2358, ts.DiagnosticCategory.Error, "The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_paramete_2358", "The left-hand side of an 'instanceof' expression must be of type 'any', an object type or a type parameter."),
        The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_Function_interface_type: diag(2359, ts.DiagnosticCategory.Error, "The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_F_2359", "The right-hand side of an 'instanceof' expression must be of type 'any' or of a type assignable to the 'Function' interface type."),
        The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol: diag(2360, ts.DiagnosticCategory.Error, "The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol_2360", "The left-hand side of an 'in' expression must be of type 'any', 'string', 'number', or 'symbol'."),
        The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter: diag(2361, ts.DiagnosticCategory.Error, "The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter_2361", "The right-hand side of an 'in' expression must be of type 'any', an object type or a type parameter."),
        The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type: diag(2362, ts.DiagnosticCategory.Error, "The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type_2362", "The left-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type."),
        The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type: diag(2363, ts.DiagnosticCategory.Error, "The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type_2363", "The right-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type."),
        The_left_hand_side_of_an_assignment_expression_must_be_a_variable_or_a_property_access: diag(2364, ts.DiagnosticCategory.Error, "The_left_hand_side_of_an_assignment_expression_must_be_a_variable_or_a_property_access_2364", "The left-hand side of an assignment expression must be a variable or a property access."),
        Operator_0_cannot_be_applied_to_types_1_and_2: diag(2365, ts.DiagnosticCategory.Error, "Operator_0_cannot_be_applied_to_types_1_and_2_2365", "Operator '{0}' cannot be applied to types '{1}' and '{2}'."),
        Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined: diag(2366, ts.DiagnosticCategory.Error, "Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined_2366", "Function lacks ending return statement and return type does not include 'undefined'."),
        Type_parameter_name_cannot_be_0: diag(2368, ts.DiagnosticCategory.Error, "Type_parameter_name_cannot_be_0_2368", "Type parameter name cannot be '{0}'."),
        A_parameter_property_is_only_allowed_in_a_constructor_implementation: diag(2369, ts.DiagnosticCategory.Error, "A_parameter_property_is_only_allowed_in_a_constructor_implementation_2369", "A parameter property is only allowed in a constructor implementation."),
        A_rest_parameter_must_be_of_an_array_type: diag(2370, ts.DiagnosticCategory.Error, "A_rest_parameter_must_be_of_an_array_type_2370", "A rest parameter must be of an array type."),
        A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation: diag(2371, ts.DiagnosticCategory.Error, "A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation_2371", "A parameter initializer is only allowed in a function or constructor implementation."),
        Parameter_0_cannot_be_referenced_in_its_initializer: diag(2372, ts.DiagnosticCategory.Error, "Parameter_0_cannot_be_referenced_in_its_initializer_2372", "Parameter '{0}' cannot be referenced in its initializer."),
        Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it: diag(2373, ts.DiagnosticCategory.Error, "Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it_2373", "Initializer of parameter '{0}' cannot reference identifier '{1}' declared after it."),
        Duplicate_string_index_signature: diag(2374, ts.DiagnosticCategory.Error, "Duplicate_string_index_signature_2374", "Duplicate string index signature."),
        Duplicate_number_index_signature: diag(2375, ts.DiagnosticCategory.Error, "Duplicate_number_index_signature_2375", "Duplicate number index signature."),
        A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_properties_or_has_parameter_properties: diag(2376, ts.DiagnosticCategory.Error, "A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_proper_2376", "A 'super' call must be the first statement in the constructor when a class contains initialized properties or has parameter properties."),
        Constructors_for_derived_classes_must_contain_a_super_call: diag(2377, ts.DiagnosticCategory.Error, "Constructors_for_derived_classes_must_contain_a_super_call_2377", "Constructors for derived classes must contain a 'super' call."),
        A_get_accessor_must_return_a_value: diag(2378, ts.DiagnosticCategory.Error, "A_get_accessor_must_return_a_value_2378", "A 'get' accessor must return a value."),
        Getter_and_setter_accessors_do_not_agree_in_visibility: diag(2379, ts.DiagnosticCategory.Error, "Getter_and_setter_accessors_do_not_agree_in_visibility_2379", "Getter and setter accessors do not agree in visibility."),
        get_and_set_accessor_must_have_the_same_type: diag(2380, ts.DiagnosticCategory.Error, "get_and_set_accessor_must_have_the_same_type_2380", "'get' and 'set' accessor must have the same type."),
        A_signature_with_an_implementation_cannot_use_a_string_literal_type: diag(2381, ts.DiagnosticCategory.Error, "A_signature_with_an_implementation_cannot_use_a_string_literal_type_2381", "A signature with an implementation cannot use a string literal type."),
        Specialized_overload_signature_is_not_assignable_to_any_non_specialized_signature: diag(2382, ts.DiagnosticCategory.Error, "Specialized_overload_signature_is_not_assignable_to_any_non_specialized_signature_2382", "Specialized overload signature is not assignable to any non-specialized signature."),
        Overload_signatures_must_all_be_exported_or_non_exported: diag(2383, ts.DiagnosticCategory.Error, "Overload_signatures_must_all_be_exported_or_non_exported_2383", "Overload signatures must all be exported or non-exported."),
        Overload_signatures_must_all_be_ambient_or_non_ambient: diag(2384, ts.DiagnosticCategory.Error, "Overload_signatures_must_all_be_ambient_or_non_ambient_2384", "Overload signatures must all be ambient or non-ambient."),
        Overload_signatures_must_all_be_public_private_or_protected: diag(2385, ts.DiagnosticCategory.Error, "Overload_signatures_must_all_be_public_private_or_protected_2385", "Overload signatures must all be public, private or protected."),
        Overload_signatures_must_all_be_optional_or_required: diag(2386, ts.DiagnosticCategory.Error, "Overload_signatures_must_all_be_optional_or_required_2386", "Overload signatures must all be optional or required."),
        Function_overload_must_be_static: diag(2387, ts.DiagnosticCategory.Error, "Function_overload_must_be_static_2387", "Function overload must be static."),
        Function_overload_must_not_be_static: diag(2388, ts.DiagnosticCategory.Error, "Function_overload_must_not_be_static_2388", "Function overload must not be static."),
        Function_implementation_name_must_be_0: diag(2389, ts.DiagnosticCategory.Error, "Function_implementation_name_must_be_0_2389", "Function implementation name must be '{0}'."),
        Constructor_implementation_is_missing: diag(2390, ts.DiagnosticCategory.Error, "Constructor_implementation_is_missing_2390", "Constructor implementation is missing."),
        Function_implementation_is_missing_or_not_immediately_following_the_declaration: diag(2391, ts.DiagnosticCategory.Error, "Function_implementation_is_missing_or_not_immediately_following_the_declaration_2391", "Function implementation is missing or not immediately following the declaration."),
        Multiple_constructor_implementations_are_not_allowed: diag(2392, ts.DiagnosticCategory.Error, "Multiple_constructor_implementations_are_not_allowed_2392", "Multiple constructor implementations are not allowed."),
        Duplicate_function_implementation: diag(2393, ts.DiagnosticCategory.Error, "Duplicate_function_implementation_2393", "Duplicate function implementation."),
        Overload_signature_is_not_compatible_with_function_implementation: diag(2394, ts.DiagnosticCategory.Error, "Overload_signature_is_not_compatible_with_function_implementation_2394", "Overload signature is not compatible with function implementation."),
        Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local: diag(2395, ts.DiagnosticCategory.Error, "Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local_2395", "Individual declarations in merged declaration '{0}' must be all exported or all local."),
        Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters: diag(2396, ts.DiagnosticCategory.Error, "Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters_2396", "Duplicate identifier 'arguments'. Compiler uses 'arguments' to initialize rest parameters."),
        Declaration_name_conflicts_with_built_in_global_identifier_0: diag(2397, ts.DiagnosticCategory.Error, "Declaration_name_conflicts_with_built_in_global_identifier_0_2397", "Declaration name conflicts with built-in global identifier '{0}'."),
        Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference: diag(2399, ts.DiagnosticCategory.Error, "Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference_2399", "Duplicate identifier '_this'. Compiler uses variable declaration '_this' to capture 'this' reference."),
        Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference: diag(2400, ts.DiagnosticCategory.Error, "Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference_2400", "Expression resolves to variable declaration '_this' that compiler uses to capture 'this' reference."),
        Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference: diag(2401, ts.DiagnosticCategory.Error, "Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference_2401", "Duplicate identifier '_super'. Compiler uses '_super' to capture base class reference."),
        Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference: diag(2402, ts.DiagnosticCategory.Error, "Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference_2402", "Expression resolves to '_super' that compiler uses to capture base class reference."),
        Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_type_2: diag(2403, ts.DiagnosticCategory.Error, "Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_t_2403", "Subsequent variable declarations must have the same type.  Variable '{0}' must be of type '{1}', but here has type '{2}'."),
        The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation: diag(2404, ts.DiagnosticCategory.Error, "The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation_2404", "The left-hand side of a 'for...in' statement cannot use a type annotation."),
        The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any: diag(2405, ts.DiagnosticCategory.Error, "The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any_2405", "The left-hand side of a 'for...in' statement must be of type 'string' or 'any'."),
        The_left_hand_side_of_a_for_in_statement_must_be_a_variable_or_a_property_access: diag(2406, ts.DiagnosticCategory.Error, "The_left_hand_side_of_a_for_in_statement_must_be_a_variable_or_a_property_access_2406", "The left-hand side of a 'for...in' statement must be a variable or a property access."),
        The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter_but_here_has_type_0: diag(2407, ts.DiagnosticCategory.Error, "The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter_but_2407", "The right-hand side of a 'for...in' statement must be of type 'any', an object type or a type parameter, but here has type '{0}'."),
        Setters_cannot_return_a_value: diag(2408, ts.DiagnosticCategory.Error, "Setters_cannot_return_a_value_2408", "Setters cannot return a value."),
        Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class: diag(2409, ts.DiagnosticCategory.Error, "Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class_2409", "Return type of constructor signature must be assignable to the instance type of the class."),
        The_with_statement_is_not_supported_All_symbols_in_a_with_block_will_have_type_any: diag(2410, ts.DiagnosticCategory.Error, "The_with_statement_is_not_supported_All_symbols_in_a_with_block_will_have_type_any_2410", "The 'with' statement is not supported. All symbols in a 'with' block will have type 'any'."),
        Property_0_of_type_1_is_not_assignable_to_string_index_type_2: diag(2411, ts.DiagnosticCategory.Error, "Property_0_of_type_1_is_not_assignable_to_string_index_type_2_2411", "Property '{0}' of type '{1}' is not assignable to string index type '{2}'."),
        Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2: diag(2412, ts.DiagnosticCategory.Error, "Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2_2412", "Property '{0}' of type '{1}' is not assignable to numeric index type '{2}'."),
        Numeric_index_type_0_is_not_assignable_to_string_index_type_1: diag(2413, ts.DiagnosticCategory.Error, "Numeric_index_type_0_is_not_assignable_to_string_index_type_1_2413", "Numeric index type '{0}' is not assignable to string index type '{1}'."),
        Class_name_cannot_be_0: diag(2414, ts.DiagnosticCategory.Error, "Class_name_cannot_be_0_2414", "Class name cannot be '{0}'."),
        Class_0_incorrectly_extends_base_class_1: diag(2415, ts.DiagnosticCategory.Error, "Class_0_incorrectly_extends_base_class_1_2415", "Class '{0}' incorrectly extends base class '{1}'."),
        Property_0_in_type_1_is_not_assignable_to_the_same_property_in_base_type_2: diag(2416, ts.DiagnosticCategory.Error, "Property_0_in_type_1_is_not_assignable_to_the_same_property_in_base_type_2_2416", "Property '{0}' in type '{1}' is not assignable to the same property in base type '{2}'."),
        Class_static_side_0_incorrectly_extends_base_class_static_side_1: diag(2417, ts.DiagnosticCategory.Error, "Class_static_side_0_incorrectly_extends_base_class_static_side_1_2417", "Class static side '{0}' incorrectly extends base class static side '{1}'."),
        Class_0_incorrectly_implements_interface_1: diag(2420, ts.DiagnosticCategory.Error, "Class_0_incorrectly_implements_interface_1_2420", "Class '{0}' incorrectly implements interface '{1}'."),
        A_class_may_only_implement_another_class_or_interface: diag(2422, ts.DiagnosticCategory.Error, "A_class_may_only_implement_another_class_or_interface_2422", "A class may only implement another class or interface."),
        Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_accessor: diag(2423, ts.DiagnosticCategory.Error, "Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_access_2423", "Class '{0}' defines instance member function '{1}', but extended class '{2}' defines it as instance member accessor."),
        Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_property: diag(2424, ts.DiagnosticCategory.Error, "Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_proper_2424", "Class '{0}' defines instance member function '{1}', but extended class '{2}' defines it as instance member property."),
        Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_function: diag(2425, ts.DiagnosticCategory.Error, "Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_functi_2425", "Class '{0}' defines instance member property '{1}', but extended class '{2}' defines it as instance member function."),
        Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_function: diag(2426, ts.DiagnosticCategory.Error, "Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_functi_2426", "Class '{0}' defines instance member accessor '{1}', but extended class '{2}' defines it as instance member function."),
        Interface_name_cannot_be_0: diag(2427, ts.DiagnosticCategory.Error, "Interface_name_cannot_be_0_2427", "Interface name cannot be '{0}'."),
        All_declarations_of_0_must_have_identical_type_parameters: diag(2428, ts.DiagnosticCategory.Error, "All_declarations_of_0_must_have_identical_type_parameters_2428", "All declarations of '{0}' must have identical type parameters."),
        Interface_0_incorrectly_extends_interface_1: diag(2430, ts.DiagnosticCategory.Error, "Interface_0_incorrectly_extends_interface_1_2430", "Interface '{0}' incorrectly extends interface '{1}'."),
        Enum_name_cannot_be_0: diag(2431, ts.DiagnosticCategory.Error, "Enum_name_cannot_be_0_2431", "Enum name cannot be '{0}'."),
        In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enum_element: diag(2432, ts.DiagnosticCategory.Error, "In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enu_2432", "In an enum with multiple declarations, only one declaration can omit an initializer for its first enum element."),
        A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merged: diag(2433, ts.DiagnosticCategory.Error, "A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merg_2433", "A namespace declaration cannot be in a different file from a class or function with which it is merged."),
        A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged: diag(2434, ts.DiagnosticCategory.Error, "A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged_2434", "A namespace declaration cannot be located prior to a class or function with which it is merged."),
        Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces: diag(2435, ts.DiagnosticCategory.Error, "Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces_2435", "Ambient modules cannot be nested in other modules or namespaces."),
        Ambient_module_declaration_cannot_specify_relative_module_name: diag(2436, ts.DiagnosticCategory.Error, "Ambient_module_declaration_cannot_specify_relative_module_name_2436", "Ambient module declaration cannot specify relative module name."),
        Module_0_is_hidden_by_a_local_declaration_with_the_same_name: diag(2437, ts.DiagnosticCategory.Error, "Module_0_is_hidden_by_a_local_declaration_with_the_same_name_2437", "Module '{0}' is hidden by a local declaration with the same name."),
        Import_name_cannot_be_0: diag(2438, ts.DiagnosticCategory.Error, "Import_name_cannot_be_0_2438", "Import name cannot be '{0}'."),
        Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relative_module_name: diag(2439, ts.DiagnosticCategory.Error, "Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relati_2439", "Import or export declaration in an ambient module declaration cannot reference module through relative module name."),
        Import_declaration_conflicts_with_local_declaration_of_0: diag(2440, ts.DiagnosticCategory.Error, "Import_declaration_conflicts_with_local_declaration_of_0_2440", "Import declaration conflicts with local declaration of '{0}'."),
        Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module: diag(2441, ts.DiagnosticCategory.Error, "Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_2441", "Duplicate identifier '{0}'. Compiler reserves name '{1}' in top level scope of a module."),
        Types_have_separate_declarations_of_a_private_property_0: diag(2442, ts.DiagnosticCategory.Error, "Types_have_separate_declarations_of_a_private_property_0_2442", "Types have separate declarations of a private property '{0}'."),
        Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2: diag(2443, ts.DiagnosticCategory.Error, "Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2_2443", "Property '{0}' is protected but type '{1}' is not a class derived from '{2}'."),
        Property_0_is_protected_in_type_1_but_public_in_type_2: diag(2444, ts.DiagnosticCategory.Error, "Property_0_is_protected_in_type_1_but_public_in_type_2_2444", "Property '{0}' is protected in type '{1}' but public in type '{2}'."),
        Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses: diag(2445, ts.DiagnosticCategory.Error, "Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses_2445", "Property '{0}' is protected and only accessible within class '{1}' and its subclasses."),
        Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1: diag(2446, ts.DiagnosticCategory.Error, "Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1_2446", "Property '{0}' is protected and only accessible through an instance of class '{1}'."),
        The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead: diag(2447, ts.DiagnosticCategory.Error, "The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead_2447", "The '{0}' operator is not allowed for boolean types. Consider using '{1}' instead."),
        Block_scoped_variable_0_used_before_its_declaration: diag(2448, ts.DiagnosticCategory.Error, "Block_scoped_variable_0_used_before_its_declaration_2448", "Block-scoped variable '{0}' used before its declaration."),
        Class_0_used_before_its_declaration: diag(2449, ts.DiagnosticCategory.Error, "Class_0_used_before_its_declaration_2449", "Class '{0}' used before its declaration."),
        Enum_0_used_before_its_declaration: diag(2450, ts.DiagnosticCategory.Error, "Enum_0_used_before_its_declaration_2450", "Enum '{0}' used before its declaration."),
        Cannot_redeclare_block_scoped_variable_0: diag(2451, ts.DiagnosticCategory.Error, "Cannot_redeclare_block_scoped_variable_0_2451", "Cannot redeclare block-scoped variable '{0}'."),
        An_enum_member_cannot_have_a_numeric_name: diag(2452, ts.DiagnosticCategory.Error, "An_enum_member_cannot_have_a_numeric_name_2452", "An enum member cannot have a numeric name."),
        The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_type_arguments_explicitly: diag(2453, ts.DiagnosticCategory.Error, "The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_typ_2453", "The type argument for type parameter '{0}' cannot be inferred from the usage. Consider specifying the type arguments explicitly."),
        Variable_0_is_used_before_being_assigned: diag(2454, ts.DiagnosticCategory.Error, "Variable_0_is_used_before_being_assigned_2454", "Variable '{0}' is used before being assigned."),
        Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0: diag(2455, ts.DiagnosticCategory.Error, "Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0_2455", "Type argument candidate '{1}' is not a valid type argument because it is not a supertype of candidate '{0}'."),
        Type_alias_0_circularly_references_itself: diag(2456, ts.DiagnosticCategory.Error, "Type_alias_0_circularly_references_itself_2456", "Type alias '{0}' circularly references itself."),
        Type_alias_name_cannot_be_0: diag(2457, ts.DiagnosticCategory.Error, "Type_alias_name_cannot_be_0_2457", "Type alias name cannot be '{0}'."),
        An_AMD_module_cannot_have_multiple_name_assignments: diag(2458, ts.DiagnosticCategory.Error, "An_AMD_module_cannot_have_multiple_name_assignments_2458", "An AMD module cannot have multiple name assignments."),
        Type_0_has_no_property_1_and_no_string_index_signature: diag(2459, ts.DiagnosticCategory.Error, "Type_0_has_no_property_1_and_no_string_index_signature_2459", "Type '{0}' has no property '{1}' and no string index signature."),
        Type_0_has_no_property_1: diag(2460, ts.DiagnosticCategory.Error, "Type_0_has_no_property_1_2460", "Type '{0}' has no property '{1}'."),
        Type_0_is_not_an_array_type: diag(2461, ts.DiagnosticCategory.Error, "Type_0_is_not_an_array_type_2461", "Type '{0}' is not an array type."),
        A_rest_element_must_be_last_in_a_destructuring_pattern: diag(2462, ts.DiagnosticCategory.Error, "A_rest_element_must_be_last_in_a_destructuring_pattern_2462", "A rest element must be last in a destructuring pattern."),
        A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature: diag(2463, ts.DiagnosticCategory.Error, "A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature_2463", "A binding pattern parameter cannot be optional in an implementation signature."),
        A_computed_property_name_must_be_of_type_string_number_symbol_or_any: diag(2464, ts.DiagnosticCategory.Error, "A_computed_property_name_must_be_of_type_string_number_symbol_or_any_2464", "A computed property name must be of type 'string', 'number', 'symbol', or 'any'."),
        this_cannot_be_referenced_in_a_computed_property_name: diag(2465, ts.DiagnosticCategory.Error, "this_cannot_be_referenced_in_a_computed_property_name_2465", "'this' cannot be referenced in a computed property name."),
        super_cannot_be_referenced_in_a_computed_property_name: diag(2466, ts.DiagnosticCategory.Error, "super_cannot_be_referenced_in_a_computed_property_name_2466", "'super' cannot be referenced in a computed property name."),
        A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type: diag(2467, ts.DiagnosticCategory.Error, "A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type_2467", "A computed property name cannot reference a type parameter from its containing type."),
        Cannot_find_global_value_0: diag(2468, ts.DiagnosticCategory.Error, "Cannot_find_global_value_0_2468", "Cannot find global value '{0}'."),
        The_0_operator_cannot_be_applied_to_type_symbol: diag(2469, ts.DiagnosticCategory.Error, "The_0_operator_cannot_be_applied_to_type_symbol_2469", "The '{0}' operator cannot be applied to type 'symbol'."),
        Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object: diag(2470, ts.DiagnosticCategory.Error, "Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object_2470", "'Symbol' reference does not refer to the global Symbol constructor object."),
        A_computed_property_name_of_the_form_0_must_be_of_type_symbol: diag(2471, ts.DiagnosticCategory.Error, "A_computed_property_name_of_the_form_0_must_be_of_type_symbol_2471", "A computed property name of the form '{0}' must be of type 'symbol'."),
        Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher: diag(2472, ts.DiagnosticCategory.Error, "Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher_2472", "Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher."),
        Enum_declarations_must_all_be_const_or_non_const: diag(2473, ts.DiagnosticCategory.Error, "Enum_declarations_must_all_be_const_or_non_const_2473", "Enum declarations must all be const or non-const."),
        In_const_enum_declarations_member_initializer_must_be_constant_expression: diag(2474, ts.DiagnosticCategory.Error, "In_const_enum_declarations_member_initializer_must_be_constant_expression_2474", "In 'const' enum declarations member initializer must be constant expression."),
        const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_import_declaration_or_export_assignment_or_type_query: diag(2475, ts.DiagnosticCategory.Error, "const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_im_2475", "'const' enums can only be used in property or index access expressions or the right hand side of an import declaration or export assignment or type query."),
        A_const_enum_member_can_only_be_accessed_using_a_string_literal: diag(2476, ts.DiagnosticCategory.Error, "A_const_enum_member_can_only_be_accessed_using_a_string_literal_2476", "A const enum member can only be accessed using a string literal."),
        const_enum_member_initializer_was_evaluated_to_a_non_finite_value: diag(2477, ts.DiagnosticCategory.Error, "const_enum_member_initializer_was_evaluated_to_a_non_finite_value_2477", "'const' enum member initializer was evaluated to a non-finite value."),
        const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN: diag(2478, ts.DiagnosticCategory.Error, "const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN_2478", "'const' enum member initializer was evaluated to disallowed value 'NaN'."),
        Property_0_does_not_exist_on_const_enum_1: diag(2479, ts.DiagnosticCategory.Error, "Property_0_does_not_exist_on_const_enum_1_2479", "Property '{0}' does not exist on 'const' enum '{1}'."),
        let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations: diag(2480, ts.DiagnosticCategory.Error, "let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations_2480", "'let' is not allowed to be used as a name in 'let' or 'const' declarations."),
        Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1: diag(2481, ts.DiagnosticCategory.Error, "Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1_2481", "Cannot initialize outer scoped variable '{0}' in the same scope as block scoped declaration '{1}'."),
        The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation: diag(2483, ts.DiagnosticCategory.Error, "The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation_2483", "The left-hand side of a 'for...of' statement cannot use a type annotation."),
        Export_declaration_conflicts_with_exported_declaration_of_0: diag(2484, ts.DiagnosticCategory.Error, "Export_declaration_conflicts_with_exported_declaration_of_0_2484", "Export declaration conflicts with exported declaration of '{0}'."),
        The_left_hand_side_of_a_for_of_statement_must_be_a_variable_or_a_property_access: diag(2487, ts.DiagnosticCategory.Error, "The_left_hand_side_of_a_for_of_statement_must_be_a_variable_or_a_property_access_2487", "The left-hand side of a 'for...of' statement must be a variable or a property access."),
        Type_0_must_have_a_Symbol_iterator_method_that_returns_an_iterator: diag(2488, ts.DiagnosticCategory.Error, "Type_0_must_have_a_Symbol_iterator_method_that_returns_an_iterator_2488", "Type '{0}' must have a '[Symbol.iterator]()' method that returns an iterator."),
        An_iterator_must_have_a_next_method: diag(2489, ts.DiagnosticCategory.Error, "An_iterator_must_have_a_next_method_2489", "An iterator must have a 'next()' method."),
        The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property: diag(2490, ts.DiagnosticCategory.Error, "The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property_2490", "The type returned by the 'next()' method of an iterator must have a 'value' property."),
        The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern: diag(2491, ts.DiagnosticCategory.Error, "The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern_2491", "The left-hand side of a 'for...in' statement cannot be a destructuring pattern."),
        Cannot_redeclare_identifier_0_in_catch_clause: diag(2492, ts.DiagnosticCategory.Error, "Cannot_redeclare_identifier_0_in_catch_clause_2492", "Cannot redeclare identifier '{0}' in catch clause."),
        Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2: diag(2493, ts.DiagnosticCategory.Error, "Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2_2493", "Tuple type '{0}' with length '{1}' cannot be assigned to tuple with length '{2}'."),
        Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher: diag(2494, ts.DiagnosticCategory.Error, "Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher_2494", "Using a string in a 'for...of' statement is only supported in ECMAScript 5 and higher."),
        Type_0_is_not_an_array_type_or_a_string_type: diag(2495, ts.DiagnosticCategory.Error, "Type_0_is_not_an_array_type_or_a_string_type_2495", "Type '{0}' is not an array type or a string type."),
        The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_standard_function_expression: diag(2496, ts.DiagnosticCategory.Error, "The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_stand_2496", "The 'arguments' object cannot be referenced in an arrow function in ES3 and ES5. Consider using a standard function expression."),
        Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct: diag(2497, ts.DiagnosticCategory.Error, "Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct_2497", "Module '{0}' resolves to a non-module entity and cannot be imported using this construct."),
        Module_0_uses_export_and_cannot_be_used_with_export_Asterisk: diag(2498, ts.DiagnosticCategory.Error, "Module_0_uses_export_and_cannot_be_used_with_export_Asterisk_2498", "Module '{0}' uses 'export =' and cannot be used with 'export *'."),
        An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments: diag(2499, ts.DiagnosticCategory.Error, "An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments_2499", "An interface can only extend an identifier/qualified-name with optional type arguments."),
        A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments: diag(2500, ts.DiagnosticCategory.Error, "A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments_2500", "A class can only implement an identifier/qualified-name with optional type arguments."),
        A_rest_element_cannot_contain_a_binding_pattern: diag(2501, ts.DiagnosticCategory.Error, "A_rest_element_cannot_contain_a_binding_pattern_2501", "A rest element cannot contain a binding pattern."),
        _0_is_referenced_directly_or_indirectly_in_its_own_type_annotation: diag(2502, ts.DiagnosticCategory.Error, "_0_is_referenced_directly_or_indirectly_in_its_own_type_annotation_2502", "'{0}' is referenced directly or indirectly in its own type annotation."),
        Cannot_find_namespace_0: diag(2503, ts.DiagnosticCategory.Error, "Cannot_find_namespace_0_2503", "Cannot find namespace '{0}'."),
        Type_0_must_have_a_Symbol_asyncIterator_method_that_returns_an_async_iterator: diag(2504, ts.DiagnosticCategory.Error, "Type_0_must_have_a_Symbol_asyncIterator_method_that_returns_an_async_iterator_2504", "Type '{0}' must have a '[Symbol.asyncIterator]()' method that returns an async iterator."),
        A_generator_cannot_have_a_void_type_annotation: diag(2505, ts.DiagnosticCategory.Error, "A_generator_cannot_have_a_void_type_annotation_2505", "A generator cannot have a 'void' type annotation."),
        _0_is_referenced_directly_or_indirectly_in_its_own_base_expression: diag(2506, ts.DiagnosticCategory.Error, "_0_is_referenced_directly_or_indirectly_in_its_own_base_expression_2506", "'{0}' is referenced directly or indirectly in its own base expression."),
        Type_0_is_not_a_constructor_function_type: diag(2507, ts.DiagnosticCategory.Error, "Type_0_is_not_a_constructor_function_type_2507", "Type '{0}' is not a constructor function type."),
        No_base_constructor_has_the_specified_number_of_type_arguments: diag(2508, ts.DiagnosticCategory.Error, "No_base_constructor_has_the_specified_number_of_type_arguments_2508", "No base constructor has the specified number of type arguments."),
        Base_constructor_return_type_0_is_not_a_class_or_interface_type: diag(2509, ts.DiagnosticCategory.Error, "Base_constructor_return_type_0_is_not_a_class_or_interface_type_2509", "Base constructor return type '{0}' is not a class or interface type."),
        Base_constructors_must_all_have_the_same_return_type: diag(2510, ts.DiagnosticCategory.Error, "Base_constructors_must_all_have_the_same_return_type_2510", "Base constructors must all have the same return type."),
        Cannot_create_an_instance_of_an_abstract_class: diag(2511, ts.DiagnosticCategory.Error, "Cannot_create_an_instance_of_an_abstract_class_2511", "Cannot create an instance of an abstract class."),
        Overload_signatures_must_all_be_abstract_or_non_abstract: diag(2512, ts.DiagnosticCategory.Error, "Overload_signatures_must_all_be_abstract_or_non_abstract_2512", "Overload signatures must all be abstract or non-abstract."),
        Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression: diag(2513, ts.DiagnosticCategory.Error, "Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression_2513", "Abstract method '{0}' in class '{1}' cannot be accessed via super expression."),
        Classes_containing_abstract_methods_must_be_marked_abstract: diag(2514, ts.DiagnosticCategory.Error, "Classes_containing_abstract_methods_must_be_marked_abstract_2514", "Classes containing abstract methods must be marked abstract."),
        Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2: diag(2515, ts.DiagnosticCategory.Error, "Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2_2515", "Non-abstract class '{0}' does not implement inherited abstract member '{1}' from class '{2}'."),
        All_declarations_of_an_abstract_method_must_be_consecutive: diag(2516, ts.DiagnosticCategory.Error, "All_declarations_of_an_abstract_method_must_be_consecutive_2516", "All declarations of an abstract method must be consecutive."),
        Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type: diag(2517, ts.DiagnosticCategory.Error, "Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type_2517", "Cannot assign an abstract constructor type to a non-abstract constructor type."),
        A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard: diag(2518, ts.DiagnosticCategory.Error, "A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard_2518", "A 'this'-based type guard is not compatible with a parameter-based type guard."),
        An_async_iterator_must_have_a_next_method: diag(2519, ts.DiagnosticCategory.Error, "An_async_iterator_must_have_a_next_method_2519", "An async iterator must have a 'next()' method."),
        Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions: diag(2520, ts.DiagnosticCategory.Error, "Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions_2520", "Duplicate identifier '{0}'. Compiler uses declaration '{1}' to support async functions."),
        Expression_resolves_to_variable_declaration_0_that_compiler_uses_to_support_async_functions: diag(2521, ts.DiagnosticCategory.Error, "Expression_resolves_to_variable_declaration_0_that_compiler_uses_to_support_async_functions_2521", "Expression resolves to variable declaration '{0}' that compiler uses to support async functions."),
        The_arguments_object_cannot_be_referenced_in_an_async_function_or_method_in_ES3_and_ES5_Consider_using_a_standard_function_or_method: diag(2522, ts.DiagnosticCategory.Error, "The_arguments_object_cannot_be_referenced_in_an_async_function_or_method_in_ES3_and_ES5_Consider_usi_2522", "The 'arguments' object cannot be referenced in an async function or method in ES3 and ES5. Consider using a standard function or method."),
        yield_expressions_cannot_be_used_in_a_parameter_initializer: diag(2523, ts.DiagnosticCategory.Error, "yield_expressions_cannot_be_used_in_a_parameter_initializer_2523", "'yield' expressions cannot be used in a parameter initializer."),
        await_expressions_cannot_be_used_in_a_parameter_initializer: diag(2524, ts.DiagnosticCategory.Error, "await_expressions_cannot_be_used_in_a_parameter_initializer_2524", "'await' expressions cannot be used in a parameter initializer."),
        Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value: diag(2525, ts.DiagnosticCategory.Error, "Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value_2525", "Initializer provides no value for this binding element and the binding element has no default value."),
        A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface: diag(2526, ts.DiagnosticCategory.Error, "A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface_2526", "A 'this' type is available only in a non-static member of a class or interface."),
        The_inferred_type_of_0_references_an_inaccessible_1_type_A_type_annotation_is_necessary: diag(2527, ts.DiagnosticCategory.Error, "The_inferred_type_of_0_references_an_inaccessible_1_type_A_type_annotation_is_necessary_2527", "The inferred type of '{0}' references an inaccessible '{1}' type. A type annotation is necessary."),
        A_module_cannot_have_multiple_default_exports: diag(2528, ts.DiagnosticCategory.Error, "A_module_cannot_have_multiple_default_exports_2528", "A module cannot have multiple default exports."),
        Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_functions: diag(2529, ts.DiagnosticCategory.Error, "Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_func_2529", "Duplicate identifier '{0}'. Compiler reserves name '{1}' in top level scope of a module containing async functions."),
        Property_0_is_incompatible_with_index_signature: diag(2530, ts.DiagnosticCategory.Error, "Property_0_is_incompatible_with_index_signature_2530", "Property '{0}' is incompatible with index signature."),
        Object_is_possibly_null: diag(2531, ts.DiagnosticCategory.Error, "Object_is_possibly_null_2531", "Object is possibly 'null'."),
        Object_is_possibly_undefined: diag(2532, ts.DiagnosticCategory.Error, "Object_is_possibly_undefined_2532", "Object is possibly 'undefined'."),
        Object_is_possibly_null_or_undefined: diag(2533, ts.DiagnosticCategory.Error, "Object_is_possibly_null_or_undefined_2533", "Object is possibly 'null' or 'undefined'."),
        A_function_returning_never_cannot_have_a_reachable_end_point: diag(2534, ts.DiagnosticCategory.Error, "A_function_returning_never_cannot_have_a_reachable_end_point_2534", "A function returning 'never' cannot have a reachable end point."),
        Enum_type_0_has_members_with_initializers_that_are_not_literals: diag(2535, ts.DiagnosticCategory.Error, "Enum_type_0_has_members_with_initializers_that_are_not_literals_2535", "Enum type '{0}' has members with initializers that are not literals."),
        Type_0_cannot_be_used_to_index_type_1: diag(2536, ts.DiagnosticCategory.Error, "Type_0_cannot_be_used_to_index_type_1_2536", "Type '{0}' cannot be used to index type '{1}'."),
        Type_0_has_no_matching_index_signature_for_type_1: diag(2537, ts.DiagnosticCategory.Error, "Type_0_has_no_matching_index_signature_for_type_1_2537", "Type '{0}' has no matching index signature for type '{1}'."),
        Type_0_cannot_be_used_as_an_index_type: diag(2538, ts.DiagnosticCategory.Error, "Type_0_cannot_be_used_as_an_index_type_2538", "Type '{0}' cannot be used as an index type."),
        Cannot_assign_to_0_because_it_is_not_a_variable: diag(2539, ts.DiagnosticCategory.Error, "Cannot_assign_to_0_because_it_is_not_a_variable_2539", "Cannot assign to '{0}' because it is not a variable."),
        Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property: diag(2540, ts.DiagnosticCategory.Error, "Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property_2540", "Cannot assign to '{0}' because it is a constant or a read-only property."),
        The_target_of_an_assignment_must_be_a_variable_or_a_property_access: diag(2541, ts.DiagnosticCategory.Error, "The_target_of_an_assignment_must_be_a_variable_or_a_property_access_2541", "The target of an assignment must be a variable or a property access."),
        Index_signature_in_type_0_only_permits_reading: diag(2542, ts.DiagnosticCategory.Error, "Index_signature_in_type_0_only_permits_reading_2542", "Index signature in type '{0}' only permits reading."),
        Duplicate_identifier_newTarget_Compiler_uses_variable_declaration_newTarget_to_capture_new_target_meta_property_reference: diag(2543, ts.DiagnosticCategory.Error, "Duplicate_identifier_newTarget_Compiler_uses_variable_declaration_newTarget_to_capture_new_target_me_2543", "Duplicate identifier '_newTarget'. Compiler uses variable declaration '_newTarget' to capture 'new.target' meta-property reference."),
        Expression_resolves_to_variable_declaration_newTarget_that_compiler_uses_to_capture_new_target_meta_property_reference: diag(2544, ts.DiagnosticCategory.Error, "Expression_resolves_to_variable_declaration_newTarget_that_compiler_uses_to_capture_new_target_meta__2544", "Expression resolves to variable declaration '_newTarget' that compiler uses to capture 'new.target' meta-property reference."),
        A_mixin_class_must_have_a_constructor_with_a_single_rest_parameter_of_type_any: diag(2545, ts.DiagnosticCategory.Error, "A_mixin_class_must_have_a_constructor_with_a_single_rest_parameter_of_type_any_2545", "A mixin class must have a constructor with a single rest parameter of type 'any[]'."),
        Property_0_has_conflicting_declarations_and_is_inaccessible_in_type_1: diag(2546, ts.DiagnosticCategory.Error, "Property_0_has_conflicting_declarations_and_is_inaccessible_in_type_1_2546", "Property '{0}' has conflicting declarations and is inaccessible in type '{1}'."),
        The_type_returned_by_the_next_method_of_an_async_iterator_must_be_a_promise_for_a_type_with_a_value_property: diag(2547, ts.DiagnosticCategory.Error, "The_type_returned_by_the_next_method_of_an_async_iterator_must_be_a_promise_for_a_type_with_a_value__2547", "The type returned by the 'next()' method of an async iterator must be a promise for a type with a 'value' property."),
        Type_0_is_not_an_array_type_or_does_not_have_a_Symbol_iterator_method_that_returns_an_iterator: diag(2548, ts.DiagnosticCategory.Error, "Type_0_is_not_an_array_type_or_does_not_have_a_Symbol_iterator_method_that_returns_an_iterator_2548", "Type '{0}' is not an array type or does not have a '[Symbol.iterator]()' method that returns an iterator."),
        Type_0_is_not_an_array_type_or_a_string_type_or_does_not_have_a_Symbol_iterator_method_that_returns_an_iterator: diag(2549, ts.DiagnosticCategory.Error, "Type_0_is_not_an_array_type_or_a_string_type_or_does_not_have_a_Symbol_iterator_method_that_returns__2549", "Type '{0}' is not an array type or a string type or does not have a '[Symbol.iterator]()' method that returns an iterator."),
        Generic_type_instantiation_is_excessively_deep_and_possibly_infinite: diag(2550, ts.DiagnosticCategory.Error, "Generic_type_instantiation_is_excessively_deep_and_possibly_infinite_2550", "Generic type instantiation is excessively deep and possibly infinite."),
        Property_0_does_not_exist_on_type_1_Did_you_mean_2: diag(2551, ts.DiagnosticCategory.Error, "Property_0_does_not_exist_on_type_1_Did_you_mean_2_2551", "Property '{0}' does not exist on type '{1}'. Did you mean '{2}'?"),
        Cannot_find_name_0_Did_you_mean_1: diag(2552, ts.DiagnosticCategory.Error, "Cannot_find_name_0_Did_you_mean_1_2552", "Cannot find name '{0}'. Did you mean '{1}'?"),
        Computed_values_are_not_permitted_in_an_enum_with_string_valued_members: diag(2553, ts.DiagnosticCategory.Error, "Computed_values_are_not_permitted_in_an_enum_with_string_valued_members_2553", "Computed values are not permitted in an enum with string valued members."),
        Expected_0_arguments_but_got_1: diag(2554, ts.DiagnosticCategory.Error, "Expected_0_arguments_but_got_1_2554", "Expected {0} arguments, but got {1}."),
        Expected_at_least_0_arguments_but_got_1: diag(2555, ts.DiagnosticCategory.Error, "Expected_at_least_0_arguments_but_got_1_2555", "Expected at least {0} arguments, but got {1}."),
        Expected_0_arguments_but_got_1_or_more: diag(2556, ts.DiagnosticCategory.Error, "Expected_0_arguments_but_got_1_or_more_2556", "Expected {0} arguments, but got {1} or more."),
        Expected_at_least_0_arguments_but_got_1_or_more: diag(2557, ts.DiagnosticCategory.Error, "Expected_at_least_0_arguments_but_got_1_or_more_2557", "Expected at least {0} arguments, but got {1} or more."),
        Expected_0_type_arguments_but_got_1: diag(2558, ts.DiagnosticCategory.Error, "Expected_0_type_arguments_but_got_1_2558", "Expected {0} type arguments, but got {1}."),
        Type_0_has_no_properties_in_common_with_type_1: diag(2559, ts.DiagnosticCategory.Error, "Type_0_has_no_properties_in_common_with_type_1_2559", "Type '{0}' has no properties in common with type '{1}'."),
        Value_of_type_0_has_no_properties_in_common_with_type_1_Did_you_mean_to_call_it: diag(2560, ts.DiagnosticCategory.Error, "Value_of_type_0_has_no_properties_in_common_with_type_1_Did_you_mean_to_call_it_2560", "Value of type '{0}' has no properties in common with type '{1}'. Did you mean to call it?"),
        Object_literal_may_only_specify_known_properties_but_0_does_not_exist_in_type_1_Did_you_mean_to_write_2: diag(2561, ts.DiagnosticCategory.Error, "Object_literal_may_only_specify_known_properties_but_0_does_not_exist_in_type_1_Did_you_mean_to_writ_2561", "Object literal may only specify known properties, but '{0}' does not exist in type '{1}'. Did you mean to write '{2}'?"),
        Base_class_expressions_cannot_reference_class_type_parameters: diag(2562, ts.DiagnosticCategory.Error, "Base_class_expressions_cannot_reference_class_type_parameters_2562", "Base class expressions cannot reference class type parameters."),
        The_containing_function_or_module_body_is_too_large_for_control_flow_analysis: diag(2563, ts.DiagnosticCategory.Error, "The_containing_function_or_module_body_is_too_large_for_control_flow_analysis_2563", "The containing function or module body is too large for control flow analysis."),
        Property_0_has_no_initializer_and_is_not_definitely_assigned_in_the_constructor: diag(2564, ts.DiagnosticCategory.Error, "Property_0_has_no_initializer_and_is_not_definitely_assigned_in_the_constructor_2564", "Property '{0}' has no initializer and is not definitely assigned in the constructor."),
        Property_0_is_used_before_being_assigned: diag(2565, ts.DiagnosticCategory.Error, "Property_0_is_used_before_being_assigned_2565", "Property '{0}' is used before being assigned."),
        A_rest_element_cannot_have_a_property_name: diag(2566, ts.DiagnosticCategory.Error, "A_rest_element_cannot_have_a_property_name_2566", "A rest element cannot have a property name."),
        Enum_declarations_can_only_merge_with_namespace_or_other_enum_declarations: diag(2567, ts.DiagnosticCategory.Error, "Enum_declarations_can_only_merge_with_namespace_or_other_enum_declarations_2567", "Enum declarations can only merge with namespace or other enum declarations."),
        Type_0_is_not_an_array_type_Use_compiler_option_downlevelIteration_to_allow_iterating_of_iterators: diag(2568, ts.DiagnosticCategory.Error, "Type_0_is_not_an_array_type_Use_compiler_option_downlevelIteration_to_allow_iterating_of_iterators_2568", "Type '{0}' is not an array type. Use compiler option '--downlevelIteration' to allow iterating of iterators."),
        Type_0_is_not_an_array_type_or_a_string_type_Use_compiler_option_downlevelIteration_to_allow_iterating_of_iterators: diag(2569, ts.DiagnosticCategory.Error, "Type_0_is_not_an_array_type_or_a_string_type_Use_compiler_option_downlevelIteration_to_allow_iterati_2569", "Type '{0}' is not an array type or a string type. Use compiler option '--downlevelIteration' to allow iterating of iterators."),
        Property_0_does_not_exist_on_type_1_Did_you_forget_to_use_await: diag(2570, ts.DiagnosticCategory.Error, "Property_0_does_not_exist_on_type_1_Did_you_forget_to_use_await_2570", "Property '{0}' does not exist on type '{1}'. Did you forget to use 'await'?"),
        Object_is_of_type_unknown: diag(2571, ts.DiagnosticCategory.Error, "Object_is_of_type_unknown_2571", "Object is of type 'unknown'."),
        JSX_element_attributes_type_0_may_not_be_a_union_type: diag(2600, ts.DiagnosticCategory.Error, "JSX_element_attributes_type_0_may_not_be_a_union_type_2600", "JSX element attributes type '{0}' may not be a union type."),
        The_return_type_of_a_JSX_element_constructor_must_return_an_object_type: diag(2601, ts.DiagnosticCategory.Error, "The_return_type_of_a_JSX_element_constructor_must_return_an_object_type_2601", "The return type of a JSX element constructor must return an object type."),
        JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist: diag(2602, ts.DiagnosticCategory.Error, "JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist_2602", "JSX element implicitly has type 'any' because the global type 'JSX.Element' does not exist."),
        Property_0_in_type_1_is_not_assignable_to_type_2: diag(2603, ts.DiagnosticCategory.Error, "Property_0_in_type_1_is_not_assignable_to_type_2_2603", "Property '{0}' in type '{1}' is not assignable to type '{2}'."),
        JSX_element_type_0_does_not_have_any_construct_or_call_signatures: diag(2604, ts.DiagnosticCategory.Error, "JSX_element_type_0_does_not_have_any_construct_or_call_signatures_2604", "JSX element type '{0}' does not have any construct or call signatures."),
        JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements: diag(2605, ts.DiagnosticCategory.Error, "JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements_2605", "JSX element type '{0}' is not a constructor function for JSX elements."),
        Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property: diag(2606, ts.DiagnosticCategory.Error, "Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property_2606", "Property '{0}' of JSX spread attribute is not assignable to target property."),
        JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property: diag(2607, ts.DiagnosticCategory.Error, "JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property_2607", "JSX element class does not support attributes because it does not have a '{0}' property."),
        The_global_type_JSX_0_may_not_have_more_than_one_property: diag(2608, ts.DiagnosticCategory.Error, "The_global_type_JSX_0_may_not_have_more_than_one_property_2608", "The global type 'JSX.{0}' may not have more than one property."),
        JSX_spread_child_must_be_an_array_type: diag(2609, ts.DiagnosticCategory.Error, "JSX_spread_child_must_be_an_array_type_2609", "JSX spread child must be an array type."),
        Cannot_augment_module_0_with_value_exports_because_it_resolves_to_a_non_module_entity: diag(2649, ts.DiagnosticCategory.Error, "Cannot_augment_module_0_with_value_exports_because_it_resolves_to_a_non_module_entity_2649", "Cannot augment module '{0}' with value exports because it resolves to a non-module entity."),
        A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums: diag(2651, ts.DiagnosticCategory.Error, "A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_memb_2651", "A member initializer in a enum declaration cannot reference members declared after it, including members defined in other enums."),
        Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead: diag(2652, ts.DiagnosticCategory.Error, "Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_d_2652", "Merged declaration '{0}' cannot include a default export declaration. Consider adding a separate 'export default {0}' declaration instead."),
        Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1: diag(2653, ts.DiagnosticCategory.Error, "Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1_2653", "Non-abstract class expression does not implement inherited abstract member '{0}' from class '{1}'."),
        Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_package_author_to_update_the_package_definition: diag(2654, ts.DiagnosticCategory.Error, "Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_pack_2654", "Exported external package typings file cannot contain tripleslash references. Please contact the package author to update the package definition."),
        Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_the_package_definition: diag(2656, ts.DiagnosticCategory.Error, "Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_2656", "Exported external package typings file '{0}' is not a module. Please contact the package author to update the package definition."),
        JSX_expressions_must_have_one_parent_element: diag(2657, ts.DiagnosticCategory.Error, "JSX_expressions_must_have_one_parent_element_2657", "JSX expressions must have one parent element."),
        Type_0_provides_no_match_for_the_signature_1: diag(2658, ts.DiagnosticCategory.Error, "Type_0_provides_no_match_for_the_signature_1_2658", "Type '{0}' provides no match for the signature '{1}'."),
        super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_higher: diag(2659, ts.DiagnosticCategory.Error, "super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_highe_2659", "'super' is only allowed in members of object literal expressions when option 'target' is 'ES2015' or higher."),
        super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions: diag(2660, ts.DiagnosticCategory.Error, "super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions_2660", "'super' can only be referenced in members of derived classes or object literal expressions."),
        Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module: diag(2661, ts.DiagnosticCategory.Error, "Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module_2661", "Cannot export '{0}'. Only local declarations can be exported from a module."),
        Cannot_find_name_0_Did_you_mean_the_static_member_1_0: diag(2662, ts.DiagnosticCategory.Error, "Cannot_find_name_0_Did_you_mean_the_static_member_1_0_2662", "Cannot find name '{0}'. Did you mean the static member '{1}.{0}'?"),
        Cannot_find_name_0_Did_you_mean_the_instance_member_this_0: diag(2663, ts.DiagnosticCategory.Error, "Cannot_find_name_0_Did_you_mean_the_instance_member_this_0_2663", "Cannot find name '{0}'. Did you mean the instance member 'this.{0}'?"),
        Invalid_module_name_in_augmentation_module_0_cannot_be_found: diag(2664, ts.DiagnosticCategory.Error, "Invalid_module_name_in_augmentation_module_0_cannot_be_found_2664", "Invalid module name in augmentation, module '{0}' cannot be found."),
        Invalid_module_name_in_augmentation_Module_0_resolves_to_an_untyped_module_at_1_which_cannot_be_augmented: diag(2665, ts.DiagnosticCategory.Error, "Invalid_module_name_in_augmentation_Module_0_resolves_to_an_untyped_module_at_1_which_cannot_be_augm_2665", "Invalid module name in augmentation. Module '{0}' resolves to an untyped module at '{1}', which cannot be augmented."),
        Exports_and_export_assignments_are_not_permitted_in_module_augmentations: diag(2666, ts.DiagnosticCategory.Error, "Exports_and_export_assignments_are_not_permitted_in_module_augmentations_2666", "Exports and export assignments are not permitted in module augmentations."),
        Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_module: diag(2667, ts.DiagnosticCategory.Error, "Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_mod_2667", "Imports are not permitted in module augmentations. Consider moving them to the enclosing external module."),
        export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always_visible: diag(2668, ts.DiagnosticCategory.Error, "export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always__2668", "'export' modifier cannot be applied to ambient modules and module augmentations since they are always visible."),
        Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations: diag(2669, ts.DiagnosticCategory.Error, "Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_2669", "Augmentations for the global scope can only be directly nested in external modules or ambient module declarations."),
        Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambient_context: diag(2670, ts.DiagnosticCategory.Error, "Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambien_2670", "Augmentations for the global scope should have 'declare' modifier unless they appear in already ambient context."),
        Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity: diag(2671, ts.DiagnosticCategory.Error, "Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity_2671", "Cannot augment module '{0}' because it resolves to a non-module entity."),
        Cannot_assign_a_0_constructor_type_to_a_1_constructor_type: diag(2672, ts.DiagnosticCategory.Error, "Cannot_assign_a_0_constructor_type_to_a_1_constructor_type_2672", "Cannot assign a '{0}' constructor type to a '{1}' constructor type."),
        Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration: diag(2673, ts.DiagnosticCategory.Error, "Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration_2673", "Constructor of class '{0}' is private and only accessible within the class declaration."),
        Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration: diag(2674, ts.DiagnosticCategory.Error, "Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration_2674", "Constructor of class '{0}' is protected and only accessible within the class declaration."),
        Cannot_extend_a_class_0_Class_constructor_is_marked_as_private: diag(2675, ts.DiagnosticCategory.Error, "Cannot_extend_a_class_0_Class_constructor_is_marked_as_private_2675", "Cannot extend a class '{0}'. Class constructor is marked as private."),
        Accessors_must_both_be_abstract_or_non_abstract: diag(2676, ts.DiagnosticCategory.Error, "Accessors_must_both_be_abstract_or_non_abstract_2676", "Accessors must both be abstract or non-abstract."),
        A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type: diag(2677, ts.DiagnosticCategory.Error, "A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type_2677", "A type predicate's type must be assignable to its parameter's type."),
        Type_0_is_not_comparable_to_type_1: diag(2678, ts.DiagnosticCategory.Error, "Type_0_is_not_comparable_to_type_1_2678", "Type '{0}' is not comparable to type '{1}'."),
        A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void: diag(2679, ts.DiagnosticCategory.Error, "A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void_2679", "A function that is called with the 'new' keyword cannot have a 'this' type that is 'void'."),
        A_0_parameter_must_be_the_first_parameter: diag(2680, ts.DiagnosticCategory.Error, "A_0_parameter_must_be_the_first_parameter_2680", "A '{0}' parameter must be the first parameter."),
        A_constructor_cannot_have_a_this_parameter: diag(2681, ts.DiagnosticCategory.Error, "A_constructor_cannot_have_a_this_parameter_2681", "A constructor cannot have a 'this' parameter."),
        get_and_set_accessor_must_have_the_same_this_type: diag(2682, ts.DiagnosticCategory.Error, "get_and_set_accessor_must_have_the_same_this_type_2682", "'get' and 'set' accessor must have the same 'this' type."),
        this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation: diag(2683, ts.DiagnosticCategory.Error, "this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_2683", "'this' implicitly has type 'any' because it does not have a type annotation."),
        The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1: diag(2684, ts.DiagnosticCategory.Error, "The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1_2684", "The 'this' context of type '{0}' is not assignable to method's 'this' of type '{1}'."),
        The_this_types_of_each_signature_are_incompatible: diag(2685, ts.DiagnosticCategory.Error, "The_this_types_of_each_signature_are_incompatible_2685", "The 'this' types of each signature are incompatible."),
        _0_refers_to_a_UMD_global_but_the_current_file_is_a_module_Consider_adding_an_import_instead: diag(2686, ts.DiagnosticCategory.Error, "_0_refers_to_a_UMD_global_but_the_current_file_is_a_module_Consider_adding_an_import_instead_2686", "'{0}' refers to a UMD global, but the current file is a module. Consider adding an import instead."),
        All_declarations_of_0_must_have_identical_modifiers: diag(2687, ts.DiagnosticCategory.Error, "All_declarations_of_0_must_have_identical_modifiers_2687", "All declarations of '{0}' must have identical modifiers."),
        Cannot_find_type_definition_file_for_0: diag(2688, ts.DiagnosticCategory.Error, "Cannot_find_type_definition_file_for_0_2688", "Cannot find type definition file for '{0}'."),
        Cannot_extend_an_interface_0_Did_you_mean_implements: diag(2689, ts.DiagnosticCategory.Error, "Cannot_extend_an_interface_0_Did_you_mean_implements_2689", "Cannot extend an interface '{0}'. Did you mean 'implements'?"),
        An_import_path_cannot_end_with_a_0_extension_Consider_importing_1_instead: diag(2691, ts.DiagnosticCategory.Error, "An_import_path_cannot_end_with_a_0_extension_Consider_importing_1_instead_2691", "An import path cannot end with a '{0}' extension. Consider importing '{1}' instead."),
        _0_is_a_primitive_but_1_is_a_wrapper_object_Prefer_using_0_when_possible: diag(2692, ts.DiagnosticCategory.Error, "_0_is_a_primitive_but_1_is_a_wrapper_object_Prefer_using_0_when_possible_2692", "'{0}' is a primitive, but '{1}' is a wrapper object. Prefer using '{0}' when possible."),
        _0_only_refers_to_a_type_but_is_being_used_as_a_value_here: diag(2693, ts.DiagnosticCategory.Error, "_0_only_refers_to_a_type_but_is_being_used_as_a_value_here_2693", "'{0}' only refers to a type, but is being used as a value here."),
        Namespace_0_has_no_exported_member_1: diag(2694, ts.DiagnosticCategory.Error, "Namespace_0_has_no_exported_member_1_2694", "Namespace '{0}' has no exported member '{1}'."),
        Left_side_of_comma_operator_is_unused_and_has_no_side_effects: diag(2695, ts.DiagnosticCategory.Error, "Left_side_of_comma_operator_is_unused_and_has_no_side_effects_2695", "Left side of comma operator is unused and has no side effects.", /*reportsUnnecessary*/ true),
        The_Object_type_is_assignable_to_very_few_other_types_Did_you_mean_to_use_the_any_type_instead: diag(2696, ts.DiagnosticCategory.Error, "The_Object_type_is_assignable_to_very_few_other_types_Did_you_mean_to_use_the_any_type_instead_2696", "The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?"),
        An_async_function_or_method_must_return_a_Promise_Make_sure_you_have_a_declaration_for_Promise_or_include_ES2015_in_your_lib_option: diag(2697, ts.DiagnosticCategory.Error, "An_async_function_or_method_must_return_a_Promise_Make_sure_you_have_a_declaration_for_Promise_or_in_2697", "An async function or method must return a 'Promise'. Make sure you have a declaration for 'Promise' or include 'ES2015' in your `--lib` option."),
        Spread_types_may_only_be_created_from_object_types: diag(2698, ts.DiagnosticCategory.Error, "Spread_types_may_only_be_created_from_object_types_2698", "Spread types may only be created from object types."),
        Static_property_0_conflicts_with_built_in_property_Function_0_of_constructor_function_1: diag(2699, ts.DiagnosticCategory.Error, "Static_property_0_conflicts_with_built_in_property_Function_0_of_constructor_function_1_2699", "Static property '{0}' conflicts with built-in property 'Function.{0}' of constructor function '{1}'."),
        Rest_types_may_only_be_created_from_object_types: diag(2700, ts.DiagnosticCategory.Error, "Rest_types_may_only_be_created_from_object_types_2700", "Rest types may only be created from object types."),
        The_target_of_an_object_rest_assignment_must_be_a_variable_or_a_property_access: diag(2701, ts.DiagnosticCategory.Error, "The_target_of_an_object_rest_assignment_must_be_a_variable_or_a_property_access_2701", "The target of an object rest assignment must be a variable or a property access."),
        _0_only_refers_to_a_type_but_is_being_used_as_a_namespace_here: diag(2702, ts.DiagnosticCategory.Error, "_0_only_refers_to_a_type_but_is_being_used_as_a_namespace_here_2702", "'{0}' only refers to a type, but is being used as a namespace here."),
        The_operand_of_a_delete_operator_must_be_a_property_reference: diag(2703, ts.DiagnosticCategory.Error, "The_operand_of_a_delete_operator_must_be_a_property_reference_2703", "The operand of a delete operator must be a property reference."),
        The_operand_of_a_delete_operator_cannot_be_a_read_only_property: diag(2704, ts.DiagnosticCategory.Error, "The_operand_of_a_delete_operator_cannot_be_a_read_only_property_2704", "The operand of a delete operator cannot be a read-only property."),
        An_async_function_or_method_in_ES5_SlashES3_requires_the_Promise_constructor_Make_sure_you_have_a_declaration_for_the_Promise_constructor_or_include_ES2015_in_your_lib_option: diag(2705, ts.DiagnosticCategory.Error, "An_async_function_or_method_in_ES5_SlashES3_requires_the_Promise_constructor_Make_sure_you_have_a_de_2705", "An async function or method in ES5/ES3 requires the 'Promise' constructor.  Make sure you have a declaration for the 'Promise' constructor or include 'ES2015' in your `--lib` option."),
        Required_type_parameters_may_not_follow_optional_type_parameters: diag(2706, ts.DiagnosticCategory.Error, "Required_type_parameters_may_not_follow_optional_type_parameters_2706", "Required type parameters may not follow optional type parameters."),
        Generic_type_0_requires_between_1_and_2_type_arguments: diag(2707, ts.DiagnosticCategory.Error, "Generic_type_0_requires_between_1_and_2_type_arguments_2707", "Generic type '{0}' requires between {1} and {2} type arguments."),
        Cannot_use_namespace_0_as_a_value: diag(2708, ts.DiagnosticCategory.Error, "Cannot_use_namespace_0_as_a_value_2708", "Cannot use namespace '{0}' as a value."),
        Cannot_use_namespace_0_as_a_type: diag(2709, ts.DiagnosticCategory.Error, "Cannot_use_namespace_0_as_a_type_2709", "Cannot use namespace '{0}' as a type."),
        _0_are_specified_twice_The_attribute_named_0_will_be_overwritten: diag(2710, ts.DiagnosticCategory.Error, "_0_are_specified_twice_The_attribute_named_0_will_be_overwritten_2710", "'{0}' are specified twice. The attribute named '{0}' will be overwritten."),
        A_dynamic_import_call_returns_a_Promise_Make_sure_you_have_a_declaration_for_Promise_or_include_ES2015_in_your_lib_option: diag(2711, ts.DiagnosticCategory.Error, "A_dynamic_import_call_returns_a_Promise_Make_sure_you_have_a_declaration_for_Promise_or_include_ES20_2711", "A dynamic import call returns a 'Promise'. Make sure you have a declaration for 'Promise' or include 'ES2015' in your `--lib` option."),
        A_dynamic_import_call_in_ES5_SlashES3_requires_the_Promise_constructor_Make_sure_you_have_a_declaration_for_the_Promise_constructor_or_include_ES2015_in_your_lib_option: diag(2712, ts.DiagnosticCategory.Error, "A_dynamic_import_call_in_ES5_SlashES3_requires_the_Promise_constructor_Make_sure_you_have_a_declarat_2712", "A dynamic import call in ES5/ES3 requires the 'Promise' constructor.  Make sure you have a declaration for the 'Promise' constructor or include 'ES2015' in your `--lib` option."),
        Cannot_access_0_1_because_0_is_a_type_but_not_a_namespace_Did_you_mean_to_retrieve_the_type_of_the_property_1_in_0_with_0_1: diag(2713, ts.DiagnosticCategory.Error, "Cannot_access_0_1_because_0_is_a_type_but_not_a_namespace_Did_you_mean_to_retrieve_the_type_of_the_p_2713", "Cannot access '{0}.{1}' because '{0}' is a type, but not a namespace. Did you mean to retrieve the type of the property '{1}' in '{0}' with '{0}[\"{1}\"]'?"),
        The_expression_of_an_export_assignment_must_be_an_identifier_or_qualified_name_in_an_ambient_context: diag(2714, ts.DiagnosticCategory.Error, "The_expression_of_an_export_assignment_must_be_an_identifier_or_qualified_name_in_an_ambient_context_2714", "The expression of an export assignment must be an identifier or qualified name in an ambient context."),
        Abstract_property_0_in_class_1_cannot_be_accessed_in_the_constructor: diag(2715, ts.DiagnosticCategory.Error, "Abstract_property_0_in_class_1_cannot_be_accessed_in_the_constructor_2715", "Abstract property '{0}' in class '{1}' cannot be accessed in the constructor."),
        Type_parameter_0_has_a_circular_default: diag(2716, ts.DiagnosticCategory.Error, "Type_parameter_0_has_a_circular_default_2716", "Type parameter '{0}' has a circular default."),
        Subsequent_property_declarations_must_have_the_same_type_Property_0_must_be_of_type_1_but_here_has_type_2: diag(2717, ts.DiagnosticCategory.Error, "Subsequent_property_declarations_must_have_the_same_type_Property_0_must_be_of_type_1_but_here_has_t_2717", "Subsequent property declarations must have the same type.  Property '{0}' must be of type '{1}', but here has type '{2}'."),
        Duplicate_declaration_0: diag(2718, ts.DiagnosticCategory.Error, "Duplicate_declaration_0_2718", "Duplicate declaration '{0}'."),
        Type_0_is_not_assignable_to_type_1_Two_different_types_with_this_name_exist_but_they_are_unrelated: diag(2719, ts.DiagnosticCategory.Error, "Type_0_is_not_assignable_to_type_1_Two_different_types_with_this_name_exist_but_they_are_unrelated_2719", "Type '{0}' is not assignable to type '{1}'. Two different types with this name exist, but they are unrelated."),
        Class_0_incorrectly_implements_class_1_Did_you_mean_to_extend_1_and_inherit_its_members_as_a_subclass: diag(2720, ts.DiagnosticCategory.Error, "Class_0_incorrectly_implements_class_1_Did_you_mean_to_extend_1_and_inherit_its_members_as_a_subclas_2720", "Class '{0}' incorrectly implements class '{1}'. Did you mean to extend '{1}' and inherit its members as a subclass?"),
        Cannot_invoke_an_object_which_is_possibly_null: diag(2721, ts.DiagnosticCategory.Error, "Cannot_invoke_an_object_which_is_possibly_null_2721", "Cannot invoke an object which is possibly 'null'."),
        Cannot_invoke_an_object_which_is_possibly_undefined: diag(2722, ts.DiagnosticCategory.Error, "Cannot_invoke_an_object_which_is_possibly_undefined_2722", "Cannot invoke an object which is possibly 'undefined'."),
        Cannot_invoke_an_object_which_is_possibly_null_or_undefined: diag(2723, ts.DiagnosticCategory.Error, "Cannot_invoke_an_object_which_is_possibly_null_or_undefined_2723", "Cannot invoke an object which is possibly 'null' or 'undefined'."),
        Module_0_has_no_exported_member_1_Did_you_mean_2: diag(2724, ts.DiagnosticCategory.Error, "Module_0_has_no_exported_member_1_Did_you_mean_2_2724", "Module '{0}' has no exported member '{1}'. Did you mean '{2}'?"),
        Class_name_cannot_be_Object_when_targeting_ES5_with_module_0: diag(2725, ts.DiagnosticCategory.Error, "Class_name_cannot_be_Object_when_targeting_ES5_with_module_0_2725", "Class name cannot be 'Object' when targeting ES5 with module {0}."),
        Cannot_find_lib_definition_for_0: diag(2726, ts.DiagnosticCategory.Error, "Cannot_find_lib_definition_for_0_2726", "Cannot find lib definition for '{0}'."),
        Cannot_find_lib_definition_for_0_Did_you_mean_1: diag(2727, ts.DiagnosticCategory.Error, "Cannot_find_lib_definition_for_0_Did_you_mean_1_2727", "Cannot find lib definition for '{0}'. Did you mean '{1}'?"),
        Import_declaration_0_is_using_private_name_1: diag(4000, ts.DiagnosticCategory.Error, "Import_declaration_0_is_using_private_name_1_4000", "Import declaration '{0}' is using private name '{1}'."),
        Type_parameter_0_of_exported_class_has_or_is_using_private_name_1: diag(4002, ts.DiagnosticCategory.Error, "Type_parameter_0_of_exported_class_has_or_is_using_private_name_1_4002", "Type parameter '{0}' of exported class has or is using private name '{1}'."),
        Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1: diag(4004, ts.DiagnosticCategory.Error, "Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1_4004", "Type parameter '{0}' of exported interface has or is using private name '{1}'."),
        Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1: diag(4006, ts.DiagnosticCategory.Error, "Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1_4006", "Type parameter '{0}' of constructor signature from exported interface has or is using private name '{1}'."),
        Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1: diag(4008, ts.DiagnosticCategory.Error, "Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1_4008", "Type parameter '{0}' of call signature from exported interface has or is using private name '{1}'."),
        Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1: diag(4010, ts.DiagnosticCategory.Error, "Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1_4010", "Type parameter '{0}' of public static method from exported class has or is using private name '{1}'."),
        Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1: diag(4012, ts.DiagnosticCategory.Error, "Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1_4012", "Type parameter '{0}' of public method from exported class has or is using private name '{1}'."),
        Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1: diag(4014, ts.DiagnosticCategory.Error, "Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1_4014", "Type parameter '{0}' of method from exported interface has or is using private name '{1}'."),
        Type_parameter_0_of_exported_function_has_or_is_using_private_name_1: diag(4016, ts.DiagnosticCategory.Error, "Type_parameter_0_of_exported_function_has_or_is_using_private_name_1_4016", "Type parameter '{0}' of exported function has or is using private name '{1}'."),
        Implements_clause_of_exported_class_0_has_or_is_using_private_name_1: diag(4019, ts.DiagnosticCategory.Error, "Implements_clause_of_exported_class_0_has_or_is_using_private_name_1_4019", "Implements clause of exported class '{0}' has or is using private name '{1}'."),
        extends_clause_of_exported_class_0_has_or_is_using_private_name_1: diag(4020, ts.DiagnosticCategory.Error, "extends_clause_of_exported_class_0_has_or_is_using_private_name_1_4020", "'extends' clause of exported class '{0}' has or is using private name '{1}'."),
        extends_clause_of_exported_interface_0_has_or_is_using_private_name_1: diag(4022, ts.DiagnosticCategory.Error, "extends_clause_of_exported_interface_0_has_or_is_using_private_name_1_4022", "'extends' clause of exported interface '{0}' has or is using private name '{1}'."),
        Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: diag(4023, ts.DiagnosticCategory.Error, "Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named_4023", "Exported variable '{0}' has or is using name '{1}' from external module {2} but cannot be named."),
        Exported_variable_0_has_or_is_using_name_1_from_private_module_2: diag(4024, ts.DiagnosticCategory.Error, "Exported_variable_0_has_or_is_using_name_1_from_private_module_2_4024", "Exported variable '{0}' has or is using name '{1}' from private module '{2}'."),
        Exported_variable_0_has_or_is_using_private_name_1: diag(4025, ts.DiagnosticCategory.Error, "Exported_variable_0_has_or_is_using_private_name_1_4025", "Exported variable '{0}' has or is using private name '{1}'."),
        Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: diag(4026, ts.DiagnosticCategory.Error, "Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot__4026", "Public static property '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named."),
        Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2: diag(4027, ts.DiagnosticCategory.Error, "Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4027", "Public static property '{0}' of exported class has or is using name '{1}' from private module '{2}'."),
        Public_static_property_0_of_exported_class_has_or_is_using_private_name_1: diag(4028, ts.DiagnosticCategory.Error, "Public_static_property_0_of_exported_class_has_or_is_using_private_name_1_4028", "Public static property '{0}' of exported class has or is using private name '{1}'."),
        Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: diag(4029, ts.DiagnosticCategory.Error, "Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_name_4029", "Public property '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named."),
        Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2: diag(4030, ts.DiagnosticCategory.Error, "Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4030", "Public property '{0}' of exported class has or is using name '{1}' from private module '{2}'."),
        Public_property_0_of_exported_class_has_or_is_using_private_name_1: diag(4031, ts.DiagnosticCategory.Error, "Public_property_0_of_exported_class_has_or_is_using_private_name_1_4031", "Public property '{0}' of exported class has or is using private name '{1}'."),
        Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2: diag(4032, ts.DiagnosticCategory.Error, "Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2_4032", "Property '{0}' of exported interface has or is using name '{1}' from private module '{2}'."),
        Property_0_of_exported_interface_has_or_is_using_private_name_1: diag(4033, ts.DiagnosticCategory.Error, "Property_0_of_exported_interface_has_or_is_using_private_name_1_4033", "Property '{0}' of exported interface has or is using private name '{1}'."),
        Parameter_type_of_public_static_setter_0_from_exported_class_has_or_is_using_name_1_from_private_module_2: diag(4034, ts.DiagnosticCategory.Error, "Parameter_type_of_public_static_setter_0_from_exported_class_has_or_is_using_name_1_from_private_mod_4034", "Parameter type of public static setter '{0}' from exported class has or is using name '{1}' from private module '{2}'."),
        Parameter_type_of_public_static_setter_0_from_exported_class_has_or_is_using_private_name_1: diag(4035, ts.DiagnosticCategory.Error, "Parameter_type_of_public_static_setter_0_from_exported_class_has_or_is_using_private_name_1_4035", "Parameter type of public static setter '{0}' from exported class has or is using private name '{1}'."),
        Parameter_type_of_public_setter_0_from_exported_class_has_or_is_using_name_1_from_private_module_2: diag(4036, ts.DiagnosticCategory.Error, "Parameter_type_of_public_setter_0_from_exported_class_has_or_is_using_name_1_from_private_module_2_4036", "Parameter type of public setter '{0}' from exported class has or is using name '{1}' from private module '{2}'."),
        Parameter_type_of_public_setter_0_from_exported_class_has_or_is_using_private_name_1: diag(4037, ts.DiagnosticCategory.Error, "Parameter_type_of_public_setter_0_from_exported_class_has_or_is_using_private_name_1_4037", "Parameter type of public setter '{0}' from exported class has or is using private name '{1}'."),
        Return_type_of_public_static_getter_0_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: diag(4038, ts.DiagnosticCategory.Error, "Return_type_of_public_static_getter_0_from_exported_class_has_or_is_using_name_1_from_external_modul_4038", "Return type of public static getter '{0}' from exported class has or is using name '{1}' from external module {2} but cannot be named."),
        Return_type_of_public_static_getter_0_from_exported_class_has_or_is_using_name_1_from_private_module_2: diag(4039, ts.DiagnosticCategory.Error, "Return_type_of_public_static_getter_0_from_exported_class_has_or_is_using_name_1_from_private_module_4039", "Return type of public static getter '{0}' from exported class has or is using name '{1}' from private module '{2}'."),
        Return_type_of_public_static_getter_0_from_exported_class_has_or_is_using_private_name_1: diag(4040, ts.DiagnosticCategory.Error, "Return_type_of_public_static_getter_0_from_exported_class_has_or_is_using_private_name_1_4040", "Return type of public static getter '{0}' from exported class has or is using private name '{1}'."),
        Return_type_of_public_getter_0_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: diag(4041, ts.DiagnosticCategory.Error, "Return_type_of_public_getter_0_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_4041", "Return type of public getter '{0}' from exported class has or is using name '{1}' from external module {2} but cannot be named."),
        Return_type_of_public_getter_0_from_exported_class_has_or_is_using_name_1_from_private_module_2: diag(4042, ts.DiagnosticCategory.Error, "Return_type_of_public_getter_0_from_exported_class_has_or_is_using_name_1_from_private_module_2_4042", "Return type of public getter '{0}' from exported class has or is using name '{1}' from private module '{2}'."),
        Return_type_of_public_getter_0_from_exported_class_has_or_is_using_private_name_1: diag(4043, ts.DiagnosticCategory.Error, "Return_type_of_public_getter_0_from_exported_class_has_or_is_using_private_name_1_4043", "Return type of public getter '{0}' from exported class has or is using private name '{1}'."),
        Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: diag(4044, ts.DiagnosticCategory.Error, "Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_mod_4044", "Return type of constructor signature from exported interface has or is using name '{0}' from private module '{1}'."),
        Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0: diag(4045, ts.DiagnosticCategory.Error, "Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0_4045", "Return type of constructor signature from exported interface has or is using private name '{0}'."),
        Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: diag(4046, ts.DiagnosticCategory.Error, "Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1_4046", "Return type of call signature from exported interface has or is using name '{0}' from private module '{1}'."),
        Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0: diag(4047, ts.DiagnosticCategory.Error, "Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0_4047", "Return type of call signature from exported interface has or is using private name '{0}'."),
        Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: diag(4048, ts.DiagnosticCategory.Error, "Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1_4048", "Return type of index signature from exported interface has or is using name '{0}' from private module '{1}'."),
        Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0: diag(4049, ts.DiagnosticCategory.Error, "Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0_4049", "Return type of index signature from exported interface has or is using private name '{0}'."),
        Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: diag(4050, ts.DiagnosticCategory.Error, "Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module__4050", "Return type of public static method from exported class has or is using name '{0}' from external module {1} but cannot be named."),
        Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1: diag(4051, ts.DiagnosticCategory.Error, "Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1_4051", "Return type of public static method from exported class has or is using name '{0}' from private module '{1}'."),
        Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0: diag(4052, ts.DiagnosticCategory.Error, "Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0_4052", "Return type of public static method from exported class has or is using private name '{0}'."),
        Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: diag(4053, ts.DiagnosticCategory.Error, "Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_c_4053", "Return type of public method from exported class has or is using name '{0}' from external module {1} but cannot be named."),
        Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1: diag(4054, ts.DiagnosticCategory.Error, "Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1_4054", "Return type of public method from exported class has or is using name '{0}' from private module '{1}'."),
        Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0: diag(4055, ts.DiagnosticCategory.Error, "Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0_4055", "Return type of public method from exported class has or is using private name '{0}'."),
        Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1: diag(4056, ts.DiagnosticCategory.Error, "Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1_4056", "Return type of method from exported interface has or is using name '{0}' from private module '{1}'."),
        Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0: diag(4057, ts.DiagnosticCategory.Error, "Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0_4057", "Return type of method from exported interface has or is using private name '{0}'."),
        Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: diag(4058, ts.DiagnosticCategory.Error, "Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named_4058", "Return type of exported function has or is using name '{0}' from external module {1} but cannot be named."),
        Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1: diag(4059, ts.DiagnosticCategory.Error, "Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1_4059", "Return type of exported function has or is using name '{0}' from private module '{1}'."),
        Return_type_of_exported_function_has_or_is_using_private_name_0: diag(4060, ts.DiagnosticCategory.Error, "Return_type_of_exported_function_has_or_is_using_private_name_0_4060", "Return type of exported function has or is using private name '{0}'."),
        Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: diag(4061, ts.DiagnosticCategory.Error, "Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_can_4061", "Parameter '{0}' of constructor from exported class has or is using name '{1}' from external module {2} but cannot be named."),
        Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2: diag(4062, ts.DiagnosticCategory.Error, "Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2_4062", "Parameter '{0}' of constructor from exported class has or is using name '{1}' from private module '{2}'."),
        Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1: diag(4063, ts.DiagnosticCategory.Error, "Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1_4063", "Parameter '{0}' of constructor from exported class has or is using private name '{1}'."),
        Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2: diag(4064, ts.DiagnosticCategory.Error, "Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_mod_4064", "Parameter '{0}' of constructor signature from exported interface has or is using name '{1}' from private module '{2}'."),
        Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1: diag(4065, ts.DiagnosticCategory.Error, "Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1_4065", "Parameter '{0}' of constructor signature from exported interface has or is using private name '{1}'."),
        Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2: diag(4066, ts.DiagnosticCategory.Error, "Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2_4066", "Parameter '{0}' of call signature from exported interface has or is using name '{1}' from private module '{2}'."),
        Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1: diag(4067, ts.DiagnosticCategory.Error, "Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1_4067", "Parameter '{0}' of call signature from exported interface has or is using private name '{1}'."),
        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: diag(4068, ts.DiagnosticCategory.Error, "Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module__4068", "Parameter '{0}' of public static method from exported class has or is using name '{1}' from external module {2} but cannot be named."),
        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2: diag(4069, ts.DiagnosticCategory.Error, "Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2_4069", "Parameter '{0}' of public static method from exported class has or is using name '{1}' from private module '{2}'."),
        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1: diag(4070, ts.DiagnosticCategory.Error, "Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1_4070", "Parameter '{0}' of public static method from exported class has or is using private name '{1}'."),
        Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: diag(4071, ts.DiagnosticCategory.Error, "Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_c_4071", "Parameter '{0}' of public method from exported class has or is using name '{1}' from external module {2} but cannot be named."),
        Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2: diag(4072, ts.DiagnosticCategory.Error, "Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2_4072", "Parameter '{0}' of public method from exported class has or is using name '{1}' from private module '{2}'."),
        Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1: diag(4073, ts.DiagnosticCategory.Error, "Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1_4073", "Parameter '{0}' of public method from exported class has or is using private name '{1}'."),
        Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2: diag(4074, ts.DiagnosticCategory.Error, "Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2_4074", "Parameter '{0}' of method from exported interface has or is using name '{1}' from private module '{2}'."),
        Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1: diag(4075, ts.DiagnosticCategory.Error, "Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1_4075", "Parameter '{0}' of method from exported interface has or is using private name '{1}'."),
        Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: diag(4076, ts.DiagnosticCategory.Error, "Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named_4076", "Parameter '{0}' of exported function has or is using name '{1}' from external module {2} but cannot be named."),
        Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2: diag(4077, ts.DiagnosticCategory.Error, "Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2_4077", "Parameter '{0}' of exported function has or is using name '{1}' from private module '{2}'."),
        Parameter_0_of_exported_function_has_or_is_using_private_name_1: diag(4078, ts.DiagnosticCategory.Error, "Parameter_0_of_exported_function_has_or_is_using_private_name_1_4078", "Parameter '{0}' of exported function has or is using private name '{1}'."),
        Exported_type_alias_0_has_or_is_using_private_name_1: diag(4081, ts.DiagnosticCategory.Error, "Exported_type_alias_0_has_or_is_using_private_name_1_4081", "Exported type alias '{0}' has or is using private name '{1}'."),
        Default_export_of_the_module_has_or_is_using_private_name_0: diag(4082, ts.DiagnosticCategory.Error, "Default_export_of_the_module_has_or_is_using_private_name_0_4082", "Default export of the module has or is using private name '{0}'."),
        Type_parameter_0_of_exported_type_alias_has_or_is_using_private_name_1: diag(4083, ts.DiagnosticCategory.Error, "Type_parameter_0_of_exported_type_alias_has_or_is_using_private_name_1_4083", "Type parameter '{0}' of exported type alias has or is using private name '{1}'."),
        Conflicting_definitions_for_0_found_at_1_and_2_Consider_installing_a_specific_version_of_this_library_to_resolve_the_conflict: diag(4090, ts.DiagnosticCategory.Error, "Conflicting_definitions_for_0_found_at_1_and_2_Consider_installing_a_specific_version_of_this_librar_4090", "Conflicting definitions for '{0}' found at '{1}' and '{2}'. Consider installing a specific version of this library to resolve the conflict."),
        Parameter_0_of_index_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2: diag(4091, ts.DiagnosticCategory.Error, "Parameter_0_of_index_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2_4091", "Parameter '{0}' of index signature from exported interface has or is using name '{1}' from private module '{2}'."),
        Parameter_0_of_index_signature_from_exported_interface_has_or_is_using_private_name_1: diag(4092, ts.DiagnosticCategory.Error, "Parameter_0_of_index_signature_from_exported_interface_has_or_is_using_private_name_1_4092", "Parameter '{0}' of index signature from exported interface has or is using private name '{1}'."),
        Property_0_of_exported_class_expression_may_not_be_private_or_protected: diag(4094, ts.DiagnosticCategory.Error, "Property_0_of_exported_class_expression_may_not_be_private_or_protected_4094", "Property '{0}' of exported class expression may not be private or protected."),
        Public_static_method_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: diag(4095, ts.DiagnosticCategory.Error, "Public_static_method_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_4095", "Public static method '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named."),
        Public_static_method_0_of_exported_class_has_or_is_using_name_1_from_private_module_2: diag(4096, ts.DiagnosticCategory.Error, "Public_static_method_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4096", "Public static method '{0}' of exported class has or is using name '{1}' from private module '{2}'."),
        Public_static_method_0_of_exported_class_has_or_is_using_private_name_1: diag(4097, ts.DiagnosticCategory.Error, "Public_static_method_0_of_exported_class_has_or_is_using_private_name_1_4097", "Public static method '{0}' of exported class has or is using private name '{1}'."),
        Public_method_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: diag(4098, ts.DiagnosticCategory.Error, "Public_method_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named_4098", "Public method '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named."),
        Public_method_0_of_exported_class_has_or_is_using_name_1_from_private_module_2: diag(4099, ts.DiagnosticCategory.Error, "Public_method_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4099", "Public method '{0}' of exported class has or is using name '{1}' from private module '{2}'."),
        Public_method_0_of_exported_class_has_or_is_using_private_name_1: diag(4100, ts.DiagnosticCategory.Error, "Public_method_0_of_exported_class_has_or_is_using_private_name_1_4100", "Public method '{0}' of exported class has or is using private name '{1}'."),
        Method_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2: diag(4101, ts.DiagnosticCategory.Error, "Method_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2_4101", "Method '{0}' of exported interface has or is using name '{1}' from private module '{2}'."),
        Method_0_of_exported_interface_has_or_is_using_private_name_1: diag(4102, ts.DiagnosticCategory.Error, "Method_0_of_exported_interface_has_or_is_using_private_name_1_4102", "Method '{0}' of exported interface has or is using private name '{1}'."),
        The_current_host_does_not_support_the_0_option: diag(5001, ts.DiagnosticCategory.Error, "The_current_host_does_not_support_the_0_option_5001", "The current host does not support the '{0}' option."),
        Cannot_find_the_common_subdirectory_path_for_the_input_files: diag(5009, ts.DiagnosticCategory.Error, "Cannot_find_the_common_subdirectory_path_for_the_input_files_5009", "Cannot find the common subdirectory path for the input files."),
        File_specification_cannot_end_in_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0: diag(5010, ts.DiagnosticCategory.Error, "File_specification_cannot_end_in_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0_5010", "File specification cannot end in a recursive directory wildcard ('**'): '{0}'."),
        Cannot_read_file_0_Colon_1: diag(5012, ts.DiagnosticCategory.Error, "Cannot_read_file_0_Colon_1_5012", "Cannot read file '{0}': {1}."),
        Failed_to_parse_file_0_Colon_1: diag(5014, ts.DiagnosticCategory.Error, "Failed_to_parse_file_0_Colon_1_5014", "Failed to parse file '{0}': {1}."),
        Unknown_compiler_option_0: diag(5023, ts.DiagnosticCategory.Error, "Unknown_compiler_option_0_5023", "Unknown compiler option '{0}'."),
        Compiler_option_0_requires_a_value_of_type_1: diag(5024, ts.DiagnosticCategory.Error, "Compiler_option_0_requires_a_value_of_type_1_5024", "Compiler option '{0}' requires a value of type {1}."),
        Could_not_write_file_0_Colon_1: diag(5033, ts.DiagnosticCategory.Error, "Could_not_write_file_0_Colon_1_5033", "Could not write file '{0}': {1}."),
        Option_project_cannot_be_mixed_with_source_files_on_a_command_line: diag(5042, ts.DiagnosticCategory.Error, "Option_project_cannot_be_mixed_with_source_files_on_a_command_line_5042", "Option 'project' cannot be mixed with source files on a command line."),
        Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES2015_or_higher: diag(5047, ts.DiagnosticCategory.Error, "Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES_5047", "Option 'isolatedModules' can only be used when either option '--module' is provided or option 'target' is 'ES2015' or higher."),
        Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided: diag(5051, ts.DiagnosticCategory.Error, "Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided_5051", "Option '{0} can only be used when either option '--inlineSourceMap' or option '--sourceMap' is provided."),
        Option_0_cannot_be_specified_without_specifying_option_1: diag(5052, ts.DiagnosticCategory.Error, "Option_0_cannot_be_specified_without_specifying_option_1_5052", "Option '{0}' cannot be specified without specifying option '{1}'."),
        Option_0_cannot_be_specified_with_option_1: diag(5053, ts.DiagnosticCategory.Error, "Option_0_cannot_be_specified_with_option_1_5053", "Option '{0}' cannot be specified with option '{1}'."),
        A_tsconfig_json_file_is_already_defined_at_Colon_0: diag(5054, ts.DiagnosticCategory.Error, "A_tsconfig_json_file_is_already_defined_at_Colon_0_5054", "A 'tsconfig.json' file is already defined at: '{0}'."),
        Cannot_write_file_0_because_it_would_overwrite_input_file: diag(5055, ts.DiagnosticCategory.Error, "Cannot_write_file_0_because_it_would_overwrite_input_file_5055", "Cannot write file '{0}' because it would overwrite input file."),
        Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files: diag(5056, ts.DiagnosticCategory.Error, "Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files_5056", "Cannot write file '{0}' because it would be overwritten by multiple input files."),
        Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0: diag(5057, ts.DiagnosticCategory.Error, "Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0_5057", "Cannot find a tsconfig.json file at the specified directory: '{0}'."),
        The_specified_path_does_not_exist_Colon_0: diag(5058, ts.DiagnosticCategory.Error, "The_specified_path_does_not_exist_Colon_0_5058", "The specified path does not exist: '{0}'."),
        Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier: diag(5059, ts.DiagnosticCategory.Error, "Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier_5059", "Invalid value for '--reactNamespace'. '{0}' is not a valid identifier."),
        Option_paths_cannot_be_used_without_specifying_baseUrl_option: diag(5060, ts.DiagnosticCategory.Error, "Option_paths_cannot_be_used_without_specifying_baseUrl_option_5060", "Option 'paths' cannot be used without specifying '--baseUrl' option."),
        Pattern_0_can_have_at_most_one_Asterisk_character: diag(5061, ts.DiagnosticCategory.Error, "Pattern_0_can_have_at_most_one_Asterisk_character_5061", "Pattern '{0}' can have at most one '*' character."),
        Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character: diag(5062, ts.DiagnosticCategory.Error, "Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character_5062", "Substitution '{0}' in pattern '{1}' in can have at most one '*' character."),
        Substitutions_for_pattern_0_should_be_an_array: diag(5063, ts.DiagnosticCategory.Error, "Substitutions_for_pattern_0_should_be_an_array_5063", "Substitutions for pattern '{0}' should be an array."),
        Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2: diag(5064, ts.DiagnosticCategory.Error, "Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2_5064", "Substitution '{0}' for pattern '{1}' has incorrect type, expected 'string', got '{2}'."),
        File_specification_cannot_contain_a_parent_directory_that_appears_after_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0: diag(5065, ts.DiagnosticCategory.Error, "File_specification_cannot_contain_a_parent_directory_that_appears_after_a_recursive_directory_wildca_5065", "File specification cannot contain a parent directory ('..') that appears after a recursive directory wildcard ('**'): '{0}'."),
        Substitutions_for_pattern_0_shouldn_t_be_an_empty_array: diag(5066, ts.DiagnosticCategory.Error, "Substitutions_for_pattern_0_shouldn_t_be_an_empty_array_5066", "Substitutions for pattern '{0}' shouldn't be an empty array."),
        Invalid_value_for_jsxFactory_0_is_not_a_valid_identifier_or_qualified_name: diag(5067, ts.DiagnosticCategory.Error, "Invalid_value_for_jsxFactory_0_is_not_a_valid_identifier_or_qualified_name_5067", "Invalid value for 'jsxFactory'. '{0}' is not a valid identifier or qualified-name."),
        Adding_a_tsconfig_json_file_will_help_organize_projects_that_contain_both_TypeScript_and_JavaScript_files_Learn_more_at_https_Colon_Slash_Slashaka_ms_Slashtsconfig: diag(5068, ts.DiagnosticCategory.Error, "Adding_a_tsconfig_json_file_will_help_organize_projects_that_contain_both_TypeScript_and_JavaScript__5068", "Adding a tsconfig.json file will help organize projects that contain both TypeScript and JavaScript files. Learn more at https://aka.ms/tsconfig."),
        Option_0_cannot_be_specified_without_specifying_option_1_or_option_2: diag(5069, ts.DiagnosticCategory.Error, "Option_0_cannot_be_specified_without_specifying_option_1_or_option_2_5069", "Option '{0}' cannot be specified without specifying option '{1}' or option '{2}'."),
        Option_resolveJsonModule_cannot_be_specified_without_node_module_resolution_strategy: diag(5070, ts.DiagnosticCategory.Error, "Option_resolveJsonModule_cannot_be_specified_without_node_module_resolution_strategy_5070", "Option '--resolveJsonModule' cannot be specified without 'node' module resolution strategy."),
        Generates_a_sourcemap_for_each_corresponding_d_ts_file: diag(6000, ts.DiagnosticCategory.Message, "Generates_a_sourcemap_for_each_corresponding_d_ts_file_6000", "Generates a sourcemap for each corresponding '.d.ts' file."),
        Concatenate_and_emit_output_to_single_file: diag(6001, ts.DiagnosticCategory.Message, "Concatenate_and_emit_output_to_single_file_6001", "Concatenate and emit output to single file."),
        Generates_corresponding_d_ts_file: diag(6002, ts.DiagnosticCategory.Message, "Generates_corresponding_d_ts_file_6002", "Generates corresponding '.d.ts' file."),
        Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations: diag(6003, ts.DiagnosticCategory.Message, "Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations_6003", "Specify the location where debugger should locate map files instead of generated locations."),
        Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations: diag(6004, ts.DiagnosticCategory.Message, "Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations_6004", "Specify the location where debugger should locate TypeScript files instead of source locations."),
        Watch_input_files: diag(6005, ts.DiagnosticCategory.Message, "Watch_input_files_6005", "Watch input files."),
        Redirect_output_structure_to_the_directory: diag(6006, ts.DiagnosticCategory.Message, "Redirect_output_structure_to_the_directory_6006", "Redirect output structure to the directory."),
        Do_not_erase_const_enum_declarations_in_generated_code: diag(6007, ts.DiagnosticCategory.Message, "Do_not_erase_const_enum_declarations_in_generated_code_6007", "Do not erase const enum declarations in generated code."),
        Do_not_emit_outputs_if_any_errors_were_reported: diag(6008, ts.DiagnosticCategory.Message, "Do_not_emit_outputs_if_any_errors_were_reported_6008", "Do not emit outputs if any errors were reported."),
        Do_not_emit_comments_to_output: diag(6009, ts.DiagnosticCategory.Message, "Do_not_emit_comments_to_output_6009", "Do not emit comments to output."),
        Do_not_emit_outputs: diag(6010, ts.DiagnosticCategory.Message, "Do_not_emit_outputs_6010", "Do not emit outputs."),
        Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typechecking: diag(6011, ts.DiagnosticCategory.Message, "Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typech_6011", "Allow default imports from modules with no default export. This does not affect code emit, just typechecking."),
        Skip_type_checking_of_declaration_files: diag(6012, ts.DiagnosticCategory.Message, "Skip_type_checking_of_declaration_files_6012", "Skip type checking of declaration files."),
        Do_not_resolve_the_real_path_of_symlinks: diag(6013, ts.DiagnosticCategory.Message, "Do_not_resolve_the_real_path_of_symlinks_6013", "Do not resolve the real path of symlinks."),
        Only_emit_d_ts_declaration_files: diag(6014, ts.DiagnosticCategory.Message, "Only_emit_d_ts_declaration_files_6014", "Only emit '.d.ts' declaration files."),
        Specify_ECMAScript_target_version_Colon_ES3_default_ES5_ES2015_ES2016_ES2017_ES2018_or_ESNEXT: diag(6015, ts.DiagnosticCategory.Message, "Specify_ECMAScript_target_version_Colon_ES3_default_ES5_ES2015_ES2016_ES2017_ES2018_or_ESNEXT_6015", "Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017','ES2018' or 'ESNEXT'."),
        Specify_module_code_generation_Colon_none_commonjs_amd_system_umd_es2015_or_ESNext: diag(6016, ts.DiagnosticCategory.Message, "Specify_module_code_generation_Colon_none_commonjs_amd_system_umd_es2015_or_ESNext_6016", "Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'."),
        Print_this_message: diag(6017, ts.DiagnosticCategory.Message, "Print_this_message_6017", "Print this message."),
        Print_the_compiler_s_version: diag(6019, ts.DiagnosticCategory.Message, "Print_the_compiler_s_version_6019", "Print the compiler's version."),
        Compile_the_project_given_the_path_to_its_configuration_file_or_to_a_folder_with_a_tsconfig_json: diag(6020, ts.DiagnosticCategory.Message, "Compile_the_project_given_the_path_to_its_configuration_file_or_to_a_folder_with_a_tsconfig_json_6020", "Compile the project given the path to its configuration file, or to a folder with a 'tsconfig.json'."),
        Syntax_Colon_0: diag(6023, ts.DiagnosticCategory.Message, "Syntax_Colon_0_6023", "Syntax: {0}"),
        options: diag(6024, ts.DiagnosticCategory.Message, "options_6024", "options"),
        file: diag(6025, ts.DiagnosticCategory.Message, "file_6025", "file"),
        Examples_Colon_0: diag(6026, ts.DiagnosticCategory.Message, "Examples_Colon_0_6026", "Examples: {0}"),
        Options_Colon: diag(6027, ts.DiagnosticCategory.Message, "Options_Colon_6027", "Options:"),
        Version_0: diag(6029, ts.DiagnosticCategory.Message, "Version_0_6029", "Version {0}"),
        Insert_command_line_options_and_files_from_a_file: diag(6030, ts.DiagnosticCategory.Message, "Insert_command_line_options_and_files_from_a_file_6030", "Insert command line options and files from a file."),
        Starting_compilation_in_watch_mode: diag(6031, ts.DiagnosticCategory.Message, "Starting_compilation_in_watch_mode_6031", "Starting compilation in watch mode..."),
        File_change_detected_Starting_incremental_compilation: diag(6032, ts.DiagnosticCategory.Message, "File_change_detected_Starting_incremental_compilation_6032", "File change detected. Starting incremental compilation..."),
        KIND: diag(6034, ts.DiagnosticCategory.Message, "KIND_6034", "KIND"),
        FILE: diag(6035, ts.DiagnosticCategory.Message, "FILE_6035", "FILE"),
        VERSION: diag(6036, ts.DiagnosticCategory.Message, "VERSION_6036", "VERSION"),
        LOCATION: diag(6037, ts.DiagnosticCategory.Message, "LOCATION_6037", "LOCATION"),
        DIRECTORY: diag(6038, ts.DiagnosticCategory.Message, "DIRECTORY_6038", "DIRECTORY"),
        STRATEGY: diag(6039, ts.DiagnosticCategory.Message, "STRATEGY_6039", "STRATEGY"),
        FILE_OR_DIRECTORY: diag(6040, ts.DiagnosticCategory.Message, "FILE_OR_DIRECTORY_6040", "FILE OR DIRECTORY"),
        Generates_corresponding_map_file: diag(6043, ts.DiagnosticCategory.Message, "Generates_corresponding_map_file_6043", "Generates corresponding '.map' file."),
        Compiler_option_0_expects_an_argument: diag(6044, ts.DiagnosticCategory.Error, "Compiler_option_0_expects_an_argument_6044", "Compiler option '{0}' expects an argument."),
        Unterminated_quoted_string_in_response_file_0: diag(6045, ts.DiagnosticCategory.Error, "Unterminated_quoted_string_in_response_file_0_6045", "Unterminated quoted string in response file '{0}'."),
        Argument_for_0_option_must_be_Colon_1: diag(6046, ts.DiagnosticCategory.Error, "Argument_for_0_option_must_be_Colon_1_6046", "Argument for '{0}' option must be: {1}."),
        Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1: diag(6048, ts.DiagnosticCategory.Error, "Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1_6048", "Locale must be of the form <language> or <language>-<territory>. For example '{0}' or '{1}'."),
        Unsupported_locale_0: diag(6049, ts.DiagnosticCategory.Error, "Unsupported_locale_0_6049", "Unsupported locale '{0}'."),
        Unable_to_open_file_0: diag(6050, ts.DiagnosticCategory.Error, "Unable_to_open_file_0_6050", "Unable to open file '{0}'."),
        Corrupted_locale_file_0: diag(6051, ts.DiagnosticCategory.Error, "Corrupted_locale_file_0_6051", "Corrupted locale file {0}."),
        Raise_error_on_expressions_and_declarations_with_an_implied_any_type: diag(6052, ts.DiagnosticCategory.Message, "Raise_error_on_expressions_and_declarations_with_an_implied_any_type_6052", "Raise error on expressions and declarations with an implied 'any' type."),
        File_0_not_found: diag(6053, ts.DiagnosticCategory.Error, "File_0_not_found_6053", "File '{0}' not found."),
        File_0_has_unsupported_extension_The_only_supported_extensions_are_1: diag(6054, ts.DiagnosticCategory.Error, "File_0_has_unsupported_extension_The_only_supported_extensions_are_1_6054", "File '{0}' has unsupported extension. The only supported extensions are {1}."),
        Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures: diag(6055, ts.DiagnosticCategory.Message, "Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures_6055", "Suppress noImplicitAny errors for indexing objects lacking index signatures."),
        Do_not_emit_declarations_for_code_that_has_an_internal_annotation: diag(6056, ts.DiagnosticCategory.Message, "Do_not_emit_declarations_for_code_that_has_an_internal_annotation_6056", "Do not emit declarations for code that has an '@internal' annotation."),
        Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir: diag(6058, ts.DiagnosticCategory.Message, "Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir_6058", "Specify the root directory of input files. Use to control the output directory structure with --outDir."),
        File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files: diag(6059, ts.DiagnosticCategory.Error, "File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files_6059", "File '{0}' is not under 'rootDir' '{1}'. 'rootDir' is expected to contain all source files."),
        Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix: diag(6060, ts.DiagnosticCategory.Message, "Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix_6060", "Specify the end of line sequence to be used when emitting files: 'CRLF' (dos) or 'LF' (unix)."),
        NEWLINE: diag(6061, ts.DiagnosticCategory.Message, "NEWLINE_6061", "NEWLINE"),
        Option_0_can_only_be_specified_in_tsconfig_json_file: diag(6064, ts.DiagnosticCategory.Error, "Option_0_can_only_be_specified_in_tsconfig_json_file_6064", "Option '{0}' can only be specified in 'tsconfig.json' file."),
        Enables_experimental_support_for_ES7_decorators: diag(6065, ts.DiagnosticCategory.Message, "Enables_experimental_support_for_ES7_decorators_6065", "Enables experimental support for ES7 decorators."),
        Enables_experimental_support_for_emitting_type_metadata_for_decorators: diag(6066, ts.DiagnosticCategory.Message, "Enables_experimental_support_for_emitting_type_metadata_for_decorators_6066", "Enables experimental support for emitting type metadata for decorators."),
        Enables_experimental_support_for_ES7_async_functions: diag(6068, ts.DiagnosticCategory.Message, "Enables_experimental_support_for_ES7_async_functions_6068", "Enables experimental support for ES7 async functions."),
        Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6: diag(6069, ts.DiagnosticCategory.Message, "Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6_6069", "Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6)."),
        Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file: diag(6070, ts.DiagnosticCategory.Message, "Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file_6070", "Initializes a TypeScript project and creates a tsconfig.json file."),
        Successfully_created_a_tsconfig_json_file: diag(6071, ts.DiagnosticCategory.Message, "Successfully_created_a_tsconfig_json_file_6071", "Successfully created a tsconfig.json file."),
        Suppress_excess_property_checks_for_object_literals: diag(6072, ts.DiagnosticCategory.Message, "Suppress_excess_property_checks_for_object_literals_6072", "Suppress excess property checks for object literals."),
        Stylize_errors_and_messages_using_color_and_context_experimental: diag(6073, ts.DiagnosticCategory.Message, "Stylize_errors_and_messages_using_color_and_context_experimental_6073", "Stylize errors and messages using color and context (experimental)."),
        Do_not_report_errors_on_unused_labels: diag(6074, ts.DiagnosticCategory.Message, "Do_not_report_errors_on_unused_labels_6074", "Do not report errors on unused labels."),
        Report_error_when_not_all_code_paths_in_function_return_a_value: diag(6075, ts.DiagnosticCategory.Message, "Report_error_when_not_all_code_paths_in_function_return_a_value_6075", "Report error when not all code paths in function return a value."),
        Report_errors_for_fallthrough_cases_in_switch_statement: diag(6076, ts.DiagnosticCategory.Message, "Report_errors_for_fallthrough_cases_in_switch_statement_6076", "Report errors for fallthrough cases in switch statement."),
        Do_not_report_errors_on_unreachable_code: diag(6077, ts.DiagnosticCategory.Message, "Do_not_report_errors_on_unreachable_code_6077", "Do not report errors on unreachable code."),
        Disallow_inconsistently_cased_references_to_the_same_file: diag(6078, ts.DiagnosticCategory.Message, "Disallow_inconsistently_cased_references_to_the_same_file_6078", "Disallow inconsistently-cased references to the same file."),
        Specify_library_files_to_be_included_in_the_compilation: diag(6079, ts.DiagnosticCategory.Message, "Specify_library_files_to_be_included_in_the_compilation_6079", "Specify library files to be included in the compilation."),
        Specify_JSX_code_generation_Colon_preserve_react_native_or_react: diag(6080, ts.DiagnosticCategory.Message, "Specify_JSX_code_generation_Colon_preserve_react_native_or_react_6080", "Specify JSX code generation: 'preserve', 'react-native', or 'react'."),
        File_0_has_an_unsupported_extension_so_skipping_it: diag(6081, ts.DiagnosticCategory.Message, "File_0_has_an_unsupported_extension_so_skipping_it_6081", "File '{0}' has an unsupported extension, so skipping it."),
        Only_amd_and_system_modules_are_supported_alongside_0: diag(6082, ts.DiagnosticCategory.Error, "Only_amd_and_system_modules_are_supported_alongside_0_6082", "Only 'amd' and 'system' modules are supported alongside --{0}."),
        Base_directory_to_resolve_non_absolute_module_names: diag(6083, ts.DiagnosticCategory.Message, "Base_directory_to_resolve_non_absolute_module_names_6083", "Base directory to resolve non-absolute module names."),
        Deprecated_Use_jsxFactory_instead_Specify_the_object_invoked_for_createElement_when_targeting_react_JSX_emit: diag(6084, ts.DiagnosticCategory.Message, "Deprecated_Use_jsxFactory_instead_Specify_the_object_invoked_for_createElement_when_targeting_react__6084", "[Deprecated] Use '--jsxFactory' instead. Specify the object invoked for createElement when targeting 'react' JSX emit"),
        Enable_tracing_of_the_name_resolution_process: diag(6085, ts.DiagnosticCategory.Message, "Enable_tracing_of_the_name_resolution_process_6085", "Enable tracing of the name resolution process."),
        Resolving_module_0_from_1: diag(6086, ts.DiagnosticCategory.Message, "Resolving_module_0_from_1_6086", "======== Resolving module '{0}' from '{1}'. ========"),
        Explicitly_specified_module_resolution_kind_Colon_0: diag(6087, ts.DiagnosticCategory.Message, "Explicitly_specified_module_resolution_kind_Colon_0_6087", "Explicitly specified module resolution kind: '{0}'."),
        Module_resolution_kind_is_not_specified_using_0: diag(6088, ts.DiagnosticCategory.Message, "Module_resolution_kind_is_not_specified_using_0_6088", "Module resolution kind is not specified, using '{0}'."),
        Module_name_0_was_successfully_resolved_to_1: diag(6089, ts.DiagnosticCategory.Message, "Module_name_0_was_successfully_resolved_to_1_6089", "======== Module name '{0}' was successfully resolved to '{1}'. ========"),
        Module_name_0_was_not_resolved: diag(6090, ts.DiagnosticCategory.Message, "Module_name_0_was_not_resolved_6090", "======== Module name '{0}' was not resolved. ========"),
        paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0: diag(6091, ts.DiagnosticCategory.Message, "paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0_6091", "'paths' option is specified, looking for a pattern to match module name '{0}'."),
        Module_name_0_matched_pattern_1: diag(6092, ts.DiagnosticCategory.Message, "Module_name_0_matched_pattern_1_6092", "Module name '{0}', matched pattern '{1}'."),
        Trying_substitution_0_candidate_module_location_Colon_1: diag(6093, ts.DiagnosticCategory.Message, "Trying_substitution_0_candidate_module_location_Colon_1_6093", "Trying substitution '{0}', candidate module location: '{1}'."),
        Resolving_module_name_0_relative_to_base_url_1_2: diag(6094, ts.DiagnosticCategory.Message, "Resolving_module_name_0_relative_to_base_url_1_2_6094", "Resolving module name '{0}' relative to base url '{1}' - '{2}'."),
        Loading_module_as_file_Slash_folder_candidate_module_location_0_target_file_type_1: diag(6095, ts.DiagnosticCategory.Message, "Loading_module_as_file_Slash_folder_candidate_module_location_0_target_file_type_1_6095", "Loading module as file / folder, candidate module location '{0}', target file type '{1}'."),
        File_0_does_not_exist: diag(6096, ts.DiagnosticCategory.Message, "File_0_does_not_exist_6096", "File '{0}' does not exist."),
        File_0_exist_use_it_as_a_name_resolution_result: diag(6097, ts.DiagnosticCategory.Message, "File_0_exist_use_it_as_a_name_resolution_result_6097", "File '{0}' exist - use it as a name resolution result."),
        Loading_module_0_from_node_modules_folder_target_file_type_1: diag(6098, ts.DiagnosticCategory.Message, "Loading_module_0_from_node_modules_folder_target_file_type_1_6098", "Loading module '{0}' from 'node_modules' folder, target file type '{1}'."),
        Found_package_json_at_0: diag(6099, ts.DiagnosticCategory.Message, "Found_package_json_at_0_6099", "Found 'package.json' at '{0}'."),
        package_json_does_not_have_a_0_field: diag(6100, ts.DiagnosticCategory.Message, "package_json_does_not_have_a_0_field_6100", "'package.json' does not have a '{0}' field."),
        package_json_has_0_field_1_that_references_2: diag(6101, ts.DiagnosticCategory.Message, "package_json_has_0_field_1_that_references_2_6101", "'package.json' has '{0}' field '{1}' that references '{2}'."),
        Allow_javascript_files_to_be_compiled: diag(6102, ts.DiagnosticCategory.Message, "Allow_javascript_files_to_be_compiled_6102", "Allow javascript files to be compiled."),
        Option_0_should_have_array_of_strings_as_a_value: diag(6103, ts.DiagnosticCategory.Error, "Option_0_should_have_array_of_strings_as_a_value_6103", "Option '{0}' should have array of strings as a value."),
        Checking_if_0_is_the_longest_matching_prefix_for_1_2: diag(6104, ts.DiagnosticCategory.Message, "Checking_if_0_is_the_longest_matching_prefix_for_1_2_6104", "Checking if '{0}' is the longest matching prefix for '{1}' - '{2}'."),
        Expected_type_of_0_field_in_package_json_to_be_string_got_1: diag(6105, ts.DiagnosticCategory.Message, "Expected_type_of_0_field_in_package_json_to_be_string_got_1_6105", "Expected type of '{0}' field in 'package.json' to be 'string', got '{1}'."),
        baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1: diag(6106, ts.DiagnosticCategory.Message, "baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1_6106", "'baseUrl' option is set to '{0}', using this value to resolve non-relative module name '{1}'."),
        rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0: diag(6107, ts.DiagnosticCategory.Message, "rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0_6107", "'rootDirs' option is set, using it to resolve relative module name '{0}'."),
        Longest_matching_prefix_for_0_is_1: diag(6108, ts.DiagnosticCategory.Message, "Longest_matching_prefix_for_0_is_1_6108", "Longest matching prefix for '{0}' is '{1}'."),
        Loading_0_from_the_root_dir_1_candidate_location_2: diag(6109, ts.DiagnosticCategory.Message, "Loading_0_from_the_root_dir_1_candidate_location_2_6109", "Loading '{0}' from the root dir '{1}', candidate location '{2}'."),
        Trying_other_entries_in_rootDirs: diag(6110, ts.DiagnosticCategory.Message, "Trying_other_entries_in_rootDirs_6110", "Trying other entries in 'rootDirs'."),
        Module_resolution_using_rootDirs_has_failed: diag(6111, ts.DiagnosticCategory.Message, "Module_resolution_using_rootDirs_has_failed_6111", "Module resolution using 'rootDirs' has failed."),
        Do_not_emit_use_strict_directives_in_module_output: diag(6112, ts.DiagnosticCategory.Message, "Do_not_emit_use_strict_directives_in_module_output_6112", "Do not emit 'use strict' directives in module output."),
        Enable_strict_null_checks: diag(6113, ts.DiagnosticCategory.Message, "Enable_strict_null_checks_6113", "Enable strict null checks."),
        Unknown_option_excludes_Did_you_mean_exclude: diag(6114, ts.DiagnosticCategory.Error, "Unknown_option_excludes_Did_you_mean_exclude_6114", "Unknown option 'excludes'. Did you mean 'exclude'?"),
        Raise_error_on_this_expressions_with_an_implied_any_type: diag(6115, ts.DiagnosticCategory.Message, "Raise_error_on_this_expressions_with_an_implied_any_type_6115", "Raise error on 'this' expressions with an implied 'any' type."),
        Resolving_type_reference_directive_0_containing_file_1_root_directory_2: diag(6116, ts.DiagnosticCategory.Message, "Resolving_type_reference_directive_0_containing_file_1_root_directory_2_6116", "======== Resolving type reference directive '{0}', containing file '{1}', root directory '{2}'. ========"),
        Resolving_using_primary_search_paths: diag(6117, ts.DiagnosticCategory.Message, "Resolving_using_primary_search_paths_6117", "Resolving using primary search paths..."),
        Resolving_from_node_modules_folder: diag(6118, ts.DiagnosticCategory.Message, "Resolving_from_node_modules_folder_6118", "Resolving from node_modules folder..."),
        Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2: diag(6119, ts.DiagnosticCategory.Message, "Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2_6119", "======== Type reference directive '{0}' was successfully resolved to '{1}', primary: {2}. ========"),
        Type_reference_directive_0_was_not_resolved: diag(6120, ts.DiagnosticCategory.Message, "Type_reference_directive_0_was_not_resolved_6120", "======== Type reference directive '{0}' was not resolved. ========"),
        Resolving_with_primary_search_path_0: diag(6121, ts.DiagnosticCategory.Message, "Resolving_with_primary_search_path_0_6121", "Resolving with primary search path '{0}'."),
        Root_directory_cannot_be_determined_skipping_primary_search_paths: diag(6122, ts.DiagnosticCategory.Message, "Root_directory_cannot_be_determined_skipping_primary_search_paths_6122", "Root directory cannot be determined, skipping primary search paths."),
        Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set: diag(6123, ts.DiagnosticCategory.Message, "Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set_6123", "======== Resolving type reference directive '{0}', containing file '{1}', root directory not set. ========"),
        Type_declaration_files_to_be_included_in_compilation: diag(6124, ts.DiagnosticCategory.Message, "Type_declaration_files_to_be_included_in_compilation_6124", "Type declaration files to be included in compilation."),
        Looking_up_in_node_modules_folder_initial_location_0: diag(6125, ts.DiagnosticCategory.Message, "Looking_up_in_node_modules_folder_initial_location_0_6125", "Looking up in 'node_modules' folder, initial location '{0}'."),
        Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_modules_folder: diag(6126, ts.DiagnosticCategory.Message, "Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_mod_6126", "Containing file is not specified and root directory cannot be determined, skipping lookup in 'node_modules' folder."),
        Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1: diag(6127, ts.DiagnosticCategory.Message, "Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1_6127", "======== Resolving type reference directive '{0}', containing file not set, root directory '{1}'. ========"),
        Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set: diag(6128, ts.DiagnosticCategory.Message, "Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set_6128", "======== Resolving type reference directive '{0}', containing file not set, root directory not set. ========"),
        Resolving_real_path_for_0_result_1: diag(6130, ts.DiagnosticCategory.Message, "Resolving_real_path_for_0_result_1_6130", "Resolving real path for '{0}', result '{1}'."),
        Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system: diag(6131, ts.DiagnosticCategory.Error, "Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system_6131", "Cannot compile modules using option '{0}' unless the '--module' flag is 'amd' or 'system'."),
        File_name_0_has_a_1_extension_stripping_it: diag(6132, ts.DiagnosticCategory.Message, "File_name_0_has_a_1_extension_stripping_it_6132", "File name '{0}' has a '{1}' extension - stripping it."),
        _0_is_declared_but_its_value_is_never_read: diag(6133, ts.DiagnosticCategory.Error, "_0_is_declared_but_its_value_is_never_read_6133", "'{0}' is declared but its value is never read.", /*reportsUnnecessary*/ true),
        Report_errors_on_unused_locals: diag(6134, ts.DiagnosticCategory.Message, "Report_errors_on_unused_locals_6134", "Report errors on unused locals."),
        Report_errors_on_unused_parameters: diag(6135, ts.DiagnosticCategory.Message, "Report_errors_on_unused_parameters_6135", "Report errors on unused parameters."),
        The_maximum_dependency_depth_to_search_under_node_modules_and_load_JavaScript_files: diag(6136, ts.DiagnosticCategory.Message, "The_maximum_dependency_depth_to_search_under_node_modules_and_load_JavaScript_files_6136", "The maximum dependency depth to search under node_modules and load JavaScript files."),
        Cannot_import_type_declaration_files_Consider_importing_0_instead_of_1: diag(6137, ts.DiagnosticCategory.Error, "Cannot_import_type_declaration_files_Consider_importing_0_instead_of_1_6137", "Cannot import type declaration files. Consider importing '{0}' instead of '{1}'."),
        Property_0_is_declared_but_its_value_is_never_read: diag(6138, ts.DiagnosticCategory.Error, "Property_0_is_declared_but_its_value_is_never_read_6138", "Property '{0}' is declared but its value is never read.", /*reportsUnnecessary*/ true),
        Import_emit_helpers_from_tslib: diag(6139, ts.DiagnosticCategory.Message, "Import_emit_helpers_from_tslib_6139", "Import emit helpers from 'tslib'."),
        Auto_discovery_for_typings_is_enabled_in_project_0_Running_extra_resolution_pass_for_module_1_using_cache_location_2: diag(6140, ts.DiagnosticCategory.Error, "Auto_discovery_for_typings_is_enabled_in_project_0_Running_extra_resolution_pass_for_module_1_using__6140", "Auto discovery for typings is enabled in project '{0}'. Running extra resolution pass for module '{1}' using cache location '{2}'."),
        Parse_in_strict_mode_and_emit_use_strict_for_each_source_file: diag(6141, ts.DiagnosticCategory.Message, "Parse_in_strict_mode_and_emit_use_strict_for_each_source_file_6141", "Parse in strict mode and emit \"use strict\" for each source file."),
        Module_0_was_resolved_to_1_but_jsx_is_not_set: diag(6142, ts.DiagnosticCategory.Error, "Module_0_was_resolved_to_1_but_jsx_is_not_set_6142", "Module '{0}' was resolved to '{1}', but '--jsx' is not set."),
        Module_0_was_resolved_as_locally_declared_ambient_module_in_file_1: diag(6144, ts.DiagnosticCategory.Message, "Module_0_was_resolved_as_locally_declared_ambient_module_in_file_1_6144", "Module '{0}' was resolved as locally declared ambient module in file '{1}'."),
        Module_0_was_resolved_as_ambient_module_declared_in_1_since_this_file_was_not_modified: diag(6145, ts.DiagnosticCategory.Message, "Module_0_was_resolved_as_ambient_module_declared_in_1_since_this_file_was_not_modified_6145", "Module '{0}' was resolved as ambient module declared in '{1}' since this file was not modified."),
        Specify_the_JSX_factory_function_to_use_when_targeting_react_JSX_emit_e_g_React_createElement_or_h: diag(6146, ts.DiagnosticCategory.Message, "Specify_the_JSX_factory_function_to_use_when_targeting_react_JSX_emit_e_g_React_createElement_or_h_6146", "Specify the JSX factory function to use when targeting 'react' JSX emit, e.g. 'React.createElement' or 'h'."),
        Resolution_for_module_0_was_found_in_cache_from_location_1: diag(6147, ts.DiagnosticCategory.Message, "Resolution_for_module_0_was_found_in_cache_from_location_1_6147", "Resolution for module '{0}' was found in cache from location '{1}'."),
        Directory_0_does_not_exist_skipping_all_lookups_in_it: diag(6148, ts.DiagnosticCategory.Message, "Directory_0_does_not_exist_skipping_all_lookups_in_it_6148", "Directory '{0}' does not exist, skipping all lookups in it."),
        Show_diagnostic_information: diag(6149, ts.DiagnosticCategory.Message, "Show_diagnostic_information_6149", "Show diagnostic information."),
        Show_verbose_diagnostic_information: diag(6150, ts.DiagnosticCategory.Message, "Show_verbose_diagnostic_information_6150", "Show verbose diagnostic information."),
        Emit_a_single_file_with_source_maps_instead_of_having_a_separate_file: diag(6151, ts.DiagnosticCategory.Message, "Emit_a_single_file_with_source_maps_instead_of_having_a_separate_file_6151", "Emit a single file with source maps instead of having a separate file."),
        Emit_the_source_alongside_the_sourcemaps_within_a_single_file_requires_inlineSourceMap_or_sourceMap_to_be_set: diag(6152, ts.DiagnosticCategory.Message, "Emit_the_source_alongside_the_sourcemaps_within_a_single_file_requires_inlineSourceMap_or_sourceMap__6152", "Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set."),
        Transpile_each_file_as_a_separate_module_similar_to_ts_transpileModule: diag(6153, ts.DiagnosticCategory.Message, "Transpile_each_file_as_a_separate_module_similar_to_ts_transpileModule_6153", "Transpile each file as a separate module (similar to 'ts.transpileModule')."),
        Print_names_of_generated_files_part_of_the_compilation: diag(6154, ts.DiagnosticCategory.Message, "Print_names_of_generated_files_part_of_the_compilation_6154", "Print names of generated files part of the compilation."),
        Print_names_of_files_part_of_the_compilation: diag(6155, ts.DiagnosticCategory.Message, "Print_names_of_files_part_of_the_compilation_6155", "Print names of files part of the compilation."),
        The_locale_used_when_displaying_messages_to_the_user_e_g_en_us: diag(6156, ts.DiagnosticCategory.Message, "The_locale_used_when_displaying_messages_to_the_user_e_g_en_us_6156", "The locale used when displaying messages to the user (e.g. 'en-us')"),
        Do_not_generate_custom_helper_functions_like_extends_in_compiled_output: diag(6157, ts.DiagnosticCategory.Message, "Do_not_generate_custom_helper_functions_like_extends_in_compiled_output_6157", "Do not generate custom helper functions like '__extends' in compiled output."),
        Do_not_include_the_default_library_file_lib_d_ts: diag(6158, ts.DiagnosticCategory.Message, "Do_not_include_the_default_library_file_lib_d_ts_6158", "Do not include the default library file (lib.d.ts)."),
        Do_not_add_triple_slash_references_or_imported_modules_to_the_list_of_compiled_files: diag(6159, ts.DiagnosticCategory.Message, "Do_not_add_triple_slash_references_or_imported_modules_to_the_list_of_compiled_files_6159", "Do not add triple-slash references or imported modules to the list of compiled files."),
        Deprecated_Use_skipLibCheck_instead_Skip_type_checking_of_default_library_declaration_files: diag(6160, ts.DiagnosticCategory.Message, "Deprecated_Use_skipLibCheck_instead_Skip_type_checking_of_default_library_declaration_files_6160", "[Deprecated] Use '--skipLibCheck' instead. Skip type checking of default library declaration files."),
        List_of_folders_to_include_type_definitions_from: diag(6161, ts.DiagnosticCategory.Message, "List_of_folders_to_include_type_definitions_from_6161", "List of folders to include type definitions from."),
        Disable_size_limitations_on_JavaScript_projects: diag(6162, ts.DiagnosticCategory.Message, "Disable_size_limitations_on_JavaScript_projects_6162", "Disable size limitations on JavaScript projects."),
        The_character_set_of_the_input_files: diag(6163, ts.DiagnosticCategory.Message, "The_character_set_of_the_input_files_6163", "The character set of the input files."),
        Emit_a_UTF_8_Byte_Order_Mark_BOM_in_the_beginning_of_output_files: diag(6164, ts.DiagnosticCategory.Message, "Emit_a_UTF_8_Byte_Order_Mark_BOM_in_the_beginning_of_output_files_6164", "Emit a UTF-8 Byte Order Mark (BOM) in the beginning of output files."),
        Do_not_truncate_error_messages: diag(6165, ts.DiagnosticCategory.Message, "Do_not_truncate_error_messages_6165", "Do not truncate error messages."),
        Output_directory_for_generated_declaration_files: diag(6166, ts.DiagnosticCategory.Message, "Output_directory_for_generated_declaration_files_6166", "Output directory for generated declaration files."),
        A_series_of_entries_which_re_map_imports_to_lookup_locations_relative_to_the_baseUrl: diag(6167, ts.DiagnosticCategory.Message, "A_series_of_entries_which_re_map_imports_to_lookup_locations_relative_to_the_baseUrl_6167", "A series of entries which re-map imports to lookup locations relative to the 'baseUrl'."),
        List_of_root_folders_whose_combined_content_represents_the_structure_of_the_project_at_runtime: diag(6168, ts.DiagnosticCategory.Message, "List_of_root_folders_whose_combined_content_represents_the_structure_of_the_project_at_runtime_6168", "List of root folders whose combined content represents the structure of the project at runtime."),
        Show_all_compiler_options: diag(6169, ts.DiagnosticCategory.Message, "Show_all_compiler_options_6169", "Show all compiler options."),
        Deprecated_Use_outFile_instead_Concatenate_and_emit_output_to_single_file: diag(6170, ts.DiagnosticCategory.Message, "Deprecated_Use_outFile_instead_Concatenate_and_emit_output_to_single_file_6170", "[Deprecated] Use '--outFile' instead. Concatenate and emit output to single file"),
        Command_line_Options: diag(6171, ts.DiagnosticCategory.Message, "Command_line_Options_6171", "Command-line Options"),
        Basic_Options: diag(6172, ts.DiagnosticCategory.Message, "Basic_Options_6172", "Basic Options"),
        Strict_Type_Checking_Options: diag(6173, ts.DiagnosticCategory.Message, "Strict_Type_Checking_Options_6173", "Strict Type-Checking Options"),
        Module_Resolution_Options: diag(6174, ts.DiagnosticCategory.Message, "Module_Resolution_Options_6174", "Module Resolution Options"),
        Source_Map_Options: diag(6175, ts.DiagnosticCategory.Message, "Source_Map_Options_6175", "Source Map Options"),
        Additional_Checks: diag(6176, ts.DiagnosticCategory.Message, "Additional_Checks_6176", "Additional Checks"),
        Experimental_Options: diag(6177, ts.DiagnosticCategory.Message, "Experimental_Options_6177", "Experimental Options"),
        Advanced_Options: diag(6178, ts.DiagnosticCategory.Message, "Advanced_Options_6178", "Advanced Options"),
        Provide_full_support_for_iterables_in_for_of_spread_and_destructuring_when_targeting_ES5_or_ES3: diag(6179, ts.DiagnosticCategory.Message, "Provide_full_support_for_iterables_in_for_of_spread_and_destructuring_when_targeting_ES5_or_ES3_6179", "Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'."),
        Enable_all_strict_type_checking_options: diag(6180, ts.DiagnosticCategory.Message, "Enable_all_strict_type_checking_options_6180", "Enable all strict type-checking options."),
        List_of_language_service_plugins: diag(6181, ts.DiagnosticCategory.Message, "List_of_language_service_plugins_6181", "List of language service plugins."),
        Scoped_package_detected_looking_in_0: diag(6182, ts.DiagnosticCategory.Message, "Scoped_package_detected_looking_in_0_6182", "Scoped package detected, looking in '{0}'"),
        Reusing_resolution_of_module_0_to_file_1_from_old_program: diag(6183, ts.DiagnosticCategory.Message, "Reusing_resolution_of_module_0_to_file_1_from_old_program_6183", "Reusing resolution of module '{0}' to file '{1}' from old program."),
        Reusing_module_resolutions_originating_in_0_since_resolutions_are_unchanged_from_old_program: diag(6184, ts.DiagnosticCategory.Message, "Reusing_module_resolutions_originating_in_0_since_resolutions_are_unchanged_from_old_program_6184", "Reusing module resolutions originating in '{0}' since resolutions are unchanged from old program."),
        Disable_strict_checking_of_generic_signatures_in_function_types: diag(6185, ts.DiagnosticCategory.Message, "Disable_strict_checking_of_generic_signatures_in_function_types_6185", "Disable strict checking of generic signatures in function types."),
        Enable_strict_checking_of_function_types: diag(6186, ts.DiagnosticCategory.Message, "Enable_strict_checking_of_function_types_6186", "Enable strict checking of function types."),
        Enable_strict_checking_of_property_initialization_in_classes: diag(6187, ts.DiagnosticCategory.Message, "Enable_strict_checking_of_property_initialization_in_classes_6187", "Enable strict checking of property initialization in classes."),
        Numeric_separators_are_not_allowed_here: diag(6188, ts.DiagnosticCategory.Error, "Numeric_separators_are_not_allowed_here_6188", "Numeric separators are not allowed here."),
        Multiple_consecutive_numeric_separators_are_not_permitted: diag(6189, ts.DiagnosticCategory.Error, "Multiple_consecutive_numeric_separators_are_not_permitted_6189", "Multiple consecutive numeric separators are not permitted."),
        Found_package_json_at_0_Package_ID_is_1: diag(6190, ts.DiagnosticCategory.Message, "Found_package_json_at_0_Package_ID_is_1_6190", "Found 'package.json' at '{0}'. Package ID is '{1}'."),
        Whether_to_keep_outdated_console_output_in_watch_mode_instead_of_clearing_the_screen: diag(6191, ts.DiagnosticCategory.Message, "Whether_to_keep_outdated_console_output_in_watch_mode_instead_of_clearing_the_screen_6191", "Whether to keep outdated console output in watch mode instead of clearing the screen."),
        All_imports_in_import_declaration_are_unused: diag(6192, ts.DiagnosticCategory.Error, "All_imports_in_import_declaration_are_unused_6192", "All imports in import declaration are unused.", /*reportsUnnecessary*/ true),
        Found_1_error_Watching_for_file_changes: diag(6193, ts.DiagnosticCategory.Message, "Found_1_error_Watching_for_file_changes_6193", "Found 1 error. Watching for file changes."),
        Found_0_errors_Watching_for_file_changes: diag(6194, ts.DiagnosticCategory.Message, "Found_0_errors_Watching_for_file_changes_6194", "Found {0} errors. Watching for file changes."),
        Resolve_keyof_to_string_valued_property_names_only_no_numbers_or_symbols: diag(6195, ts.DiagnosticCategory.Message, "Resolve_keyof_to_string_valued_property_names_only_no_numbers_or_symbols_6195", "Resolve 'keyof' to string valued property names only (no numbers or symbols)."),
        _0_is_declared_but_never_used: diag(6196, ts.DiagnosticCategory.Error, "_0_is_declared_but_never_used_6196", "'{0}' is declared but never used.", /*reportsUnnecessary*/ true),
        Include_modules_imported_with_json_extension: diag(6197, ts.DiagnosticCategory.Message, "Include_modules_imported_with_json_extension_6197", "Include modules imported with '.json' extension"),
        All_destructured_elements_are_unused: diag(6198, ts.DiagnosticCategory.Error, "All_destructured_elements_are_unused_6198", "All destructured elements are unused.", /*reportsUnnecessary*/ true),
        All_variables_are_unused: diag(6199, ts.DiagnosticCategory.Error, "All_variables_are_unused_6199", "All variables are unused.", /*reportsUnnecessary*/ true),
        Projects_to_reference: diag(6300, ts.DiagnosticCategory.Message, "Projects_to_reference_6300", "Projects to reference"),
        Enable_project_compilation: diag(6302, ts.DiagnosticCategory.Message, "Enable_project_compilation_6302", "Enable project compilation"),
        Project_references_may_not_form_a_circular_graph_Cycle_detected_Colon_0: diag(6202, ts.DiagnosticCategory.Error, "Project_references_may_not_form_a_circular_graph_Cycle_detected_Colon_0_6202", "Project references may not form a circular graph. Cycle detected: {0}"),
        Composite_projects_may_not_disable_declaration_emit: diag(6304, ts.DiagnosticCategory.Error, "Composite_projects_may_not_disable_declaration_emit_6304", "Composite projects may not disable declaration emit."),
        Output_file_0_has_not_been_built_from_source_file_1: diag(6305, ts.DiagnosticCategory.Error, "Output_file_0_has_not_been_built_from_source_file_1_6305", "Output file '{0}' has not been built from source file '{1}'."),
        Referenced_project_0_must_have_setting_composite_Colon_true: diag(6306, ts.DiagnosticCategory.Error, "Referenced_project_0_must_have_setting_composite_Colon_true_6306", "Referenced project '{0}' must have setting \"composite\": true."),
        File_0_is_not_in_project_file_list_Projects_must_list_all_files_or_use_an_include_pattern: diag(6307, ts.DiagnosticCategory.Error, "File_0_is_not_in_project_file_list_Projects_must_list_all_files_or_use_an_include_pattern_6307", "File '{0}' is not in project file list. Projects must list all files or use an 'include' pattern."),
        Cannot_prepend_project_0_because_it_does_not_have_outFile_set: diag(6308, ts.DiagnosticCategory.Error, "Cannot_prepend_project_0_because_it_does_not_have_outFile_set_6308", "Cannot prepend project '{0}' because it does not have 'outFile' set"),
        Output_file_0_from_project_1_does_not_exist: diag(6309, ts.DiagnosticCategory.Error, "Output_file_0_from_project_1_does_not_exist_6309", "Output file '{0}' from project '{1}' does not exist"),
        Project_0_is_out_of_date_because_oldest_output_1_is_older_than_newest_input_2: diag(6350, ts.DiagnosticCategory.Message, "Project_0_is_out_of_date_because_oldest_output_1_is_older_than_newest_input_2_6350", "Project '{0}' is out of date because oldest output '{1}' is older than newest input '{2}'"),
        Project_0_is_up_to_date_because_newest_input_1_is_older_than_oldest_output_2: diag(6351, ts.DiagnosticCategory.Message, "Project_0_is_up_to_date_because_newest_input_1_is_older_than_oldest_output_2_6351", "Project '{0}' is up to date because newest input '{1}' is older than oldest output '{2}'"),
        Project_0_is_out_of_date_because_output_file_1_does_not_exist: diag(6352, ts.DiagnosticCategory.Message, "Project_0_is_out_of_date_because_output_file_1_does_not_exist_6352", "Project '{0}' is out of date because output file '{1}' does not exist"),
        Project_0_is_out_of_date_because_its_dependency_1_is_out_of_date: diag(6353, ts.DiagnosticCategory.Message, "Project_0_is_out_of_date_because_its_dependency_1_is_out_of_date_6353", "Project '{0}' is out of date because its dependency '{1}' is out of date"),
        Project_0_is_up_to_date_with_d_ts_files_from_its_dependencies: diag(6354, ts.DiagnosticCategory.Message, "Project_0_is_up_to_date_with_d_ts_files_from_its_dependencies_6354", "Project '{0}' is up to date with .d.ts files from its dependencies"),
        Projects_in_this_build_Colon_0: diag(6355, ts.DiagnosticCategory.Message, "Projects_in_this_build_Colon_0_6355", "Projects in this build: {0}"),
        A_non_dry_build_would_delete_the_following_files_Colon_0: diag(6356, ts.DiagnosticCategory.Message, "A_non_dry_build_would_delete_the_following_files_Colon_0_6356", "A non-dry build would delete the following files: {0}"),
        A_non_dry_build_would_build_project_0: diag(6357, ts.DiagnosticCategory.Message, "A_non_dry_build_would_build_project_0_6357", "A non-dry build would build project '{0}'"),
        Building_project_0: diag(6358, ts.DiagnosticCategory.Message, "Building_project_0_6358", "Building project '{0}'..."),
        Updating_output_timestamps_of_project_0: diag(6359, ts.DiagnosticCategory.Message, "Updating_output_timestamps_of_project_0_6359", "Updating output timestamps of project '{0}'..."),
        delete_this_Project_0_is_up_to_date_because_it_was_previously_built: diag(6360, ts.DiagnosticCategory.Message, "delete_this_Project_0_is_up_to_date_because_it_was_previously_built_6360", "delete this - Project '{0}' is up to date because it was previously built"),
        Project_0_is_up_to_date: diag(6361, ts.DiagnosticCategory.Message, "Project_0_is_up_to_date_6361", "Project '{0}' is up to date"),
        Skipping_build_of_project_0_because_its_dependency_1_has_errors: diag(6362, ts.DiagnosticCategory.Message, "Skipping_build_of_project_0_because_its_dependency_1_has_errors_6362", "Skipping build of project '{0}' because its dependency '{1}' has errors"),
        Project_0_can_t_be_built_because_its_dependency_1_has_errors: diag(6363, ts.DiagnosticCategory.Message, "Project_0_can_t_be_built_because_its_dependency_1_has_errors_6363", "Project '{0}' can't be built because its dependency '{1}' has errors"),
        Build_one_or_more_projects_and_their_dependencies_if_out_of_date: diag(6364, ts.DiagnosticCategory.Message, "Build_one_or_more_projects_and_their_dependencies_if_out_of_date_6364", "Build one or more projects and their dependencies, if out of date"),
        Delete_the_outputs_of_all_projects: diag(6365, ts.DiagnosticCategory.Message, "Delete_the_outputs_of_all_projects_6365", "Delete the outputs of all projects"),
        Enable_verbose_logging: diag(6366, ts.DiagnosticCategory.Message, "Enable_verbose_logging_6366", "Enable verbose logging"),
        Show_what_would_be_built_or_deleted_if_specified_with_clean: diag(6367, ts.DiagnosticCategory.Message, "Show_what_would_be_built_or_deleted_if_specified_with_clean_6367", "Show what would be built (or deleted, if specified with '--clean')"),
        Build_all_projects_including_those_that_appear_to_be_up_to_date: diag(6368, ts.DiagnosticCategory.Message, "Build_all_projects_including_those_that_appear_to_be_up_to_date_6368", "Build all projects, including those that appear to be up to date"),
        Option_build_must_be_the_first_command_line_argument: diag(6369, ts.DiagnosticCategory.Error, "Option_build_must_be_the_first_command_line_argument_6369", "Option '--build' must be the first command line argument."),
        Options_0_and_1_cannot_be_combined: diag(6370, ts.DiagnosticCategory.Error, "Options_0_and_1_cannot_be_combined_6370", "Options '{0}' and '{1}' cannot be combined."),
        Skipping_clean_because_not_all_projects_could_be_located: diag(6371, ts.DiagnosticCategory.Error, "Skipping_clean_because_not_all_projects_could_be_located_6371", "Skipping clean because not all projects could be located"),
        Variable_0_implicitly_has_an_1_type: diag(7005, ts.DiagnosticCategory.Error, "Variable_0_implicitly_has_an_1_type_7005", "Variable '{0}' implicitly has an '{1}' type."),
        Parameter_0_implicitly_has_an_1_type: diag(7006, ts.DiagnosticCategory.Error, "Parameter_0_implicitly_has_an_1_type_7006", "Parameter '{0}' implicitly has an '{1}' type."),
        Member_0_implicitly_has_an_1_type: diag(7008, ts.DiagnosticCategory.Error, "Member_0_implicitly_has_an_1_type_7008", "Member '{0}' implicitly has an '{1}' type."),
        new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type: diag(7009, ts.DiagnosticCategory.Error, "new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type_7009", "'new' expression, whose target lacks a construct signature, implicitly has an 'any' type."),
        _0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type: diag(7010, ts.DiagnosticCategory.Error, "_0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type_7010", "'{0}', which lacks return-type annotation, implicitly has an '{1}' return type."),
        Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type: diag(7011, ts.DiagnosticCategory.Error, "Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type_7011", "Function expression, which lacks return-type annotation, implicitly has an '{0}' return type."),
        Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type: diag(7013, ts.DiagnosticCategory.Error, "Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type_7013", "Construct signature, which lacks return-type annotation, implicitly has an 'any' return type."),
        Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number: diag(7015, ts.DiagnosticCategory.Error, "Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number_7015", "Element implicitly has an 'any' type because index expression is not of type 'number'."),
        Could_not_find_a_declaration_file_for_module_0_1_implicitly_has_an_any_type: diag(7016, ts.DiagnosticCategory.Error, "Could_not_find_a_declaration_file_for_module_0_1_implicitly_has_an_any_type_7016", "Could not find a declaration file for module '{0}'. '{1}' implicitly has an 'any' type."),
        Element_implicitly_has_an_any_type_because_type_0_has_no_index_signature: diag(7017, ts.DiagnosticCategory.Error, "Element_implicitly_has_an_any_type_because_type_0_has_no_index_signature_7017", "Element implicitly has an 'any' type because type '{0}' has no index signature."),
        Object_literal_s_property_0_implicitly_has_an_1_type: diag(7018, ts.DiagnosticCategory.Error, "Object_literal_s_property_0_implicitly_has_an_1_type_7018", "Object literal's property '{0}' implicitly has an '{1}' type."),
        Rest_parameter_0_implicitly_has_an_any_type: diag(7019, ts.DiagnosticCategory.Error, "Rest_parameter_0_implicitly_has_an_any_type_7019", "Rest parameter '{0}' implicitly has an 'any[]' type."),
        Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type: diag(7020, ts.DiagnosticCategory.Error, "Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type_7020", "Call signature, which lacks return-type annotation, implicitly has an 'any' return type."),
        _0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or_indirectly_in_its_own_initializer: diag(7022, ts.DiagnosticCategory.Error, "_0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or__7022", "'{0}' implicitly has type 'any' because it does not have a type annotation and is referenced directly or indirectly in its own initializer."),
        _0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: diag(7023, ts.DiagnosticCategory.Error, "_0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_reference_7023", "'{0}' implicitly has return type 'any' because it does not have a return type annotation and is referenced directly or indirectly in one of its return expressions."),
        Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: diag(7024, ts.DiagnosticCategory.Error, "Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_ref_7024", "Function implicitly has return type 'any' because it does not have a return type annotation and is referenced directly or indirectly in one of its return expressions."),
        Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_type: diag(7025, ts.DiagnosticCategory.Error, "Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_typ_7025", "Generator implicitly has type '{0}' because it does not yield any values. Consider supplying a return type."),
        JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists: diag(7026, ts.DiagnosticCategory.Error, "JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists_7026", "JSX element implicitly has type 'any' because no interface 'JSX.{0}' exists."),
        Unreachable_code_detected: diag(7027, ts.DiagnosticCategory.Error, "Unreachable_code_detected_7027", "Unreachable code detected.", /*reportsUnnecessary*/ true),
        Unused_label: diag(7028, ts.DiagnosticCategory.Error, "Unused_label_7028", "Unused label.", /*reportsUnnecessary*/ true),
        Fallthrough_case_in_switch: diag(7029, ts.DiagnosticCategory.Error, "Fallthrough_case_in_switch_7029", "Fallthrough case in switch."),
        Not_all_code_paths_return_a_value: diag(7030, ts.DiagnosticCategory.Error, "Not_all_code_paths_return_a_value_7030", "Not all code paths return a value."),
        Binding_element_0_implicitly_has_an_1_type: diag(7031, ts.DiagnosticCategory.Error, "Binding_element_0_implicitly_has_an_1_type_7031", "Binding element '{0}' implicitly has an '{1}' type."),
        Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_parameter_type_annotation: diag(7032, ts.DiagnosticCategory.Error, "Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_parameter_type_annotation_7032", "Property '{0}' implicitly has type 'any', because its set accessor lacks a parameter type annotation."),
        Property_0_implicitly_has_type_any_because_its_get_accessor_lacks_a_return_type_annotation: diag(7033, ts.DiagnosticCategory.Error, "Property_0_implicitly_has_type_any_because_its_get_accessor_lacks_a_return_type_annotation_7033", "Property '{0}' implicitly has type 'any', because its get accessor lacks a return type annotation."),
        Variable_0_implicitly_has_type_1_in_some_locations_where_its_type_cannot_be_determined: diag(7034, ts.DiagnosticCategory.Error, "Variable_0_implicitly_has_type_1_in_some_locations_where_its_type_cannot_be_determined_7034", "Variable '{0}' implicitly has type '{1}' in some locations where its type cannot be determined."),
        Try_npm_install_types_Slash_0_if_it_exists_or_add_a_new_declaration_d_ts_file_containing_declare_module_0: diag(7035, ts.DiagnosticCategory.Error, "Try_npm_install_types_Slash_0_if_it_exists_or_add_a_new_declaration_d_ts_file_containing_declare_mod_7035", "Try `npm install @types/{0}` if it exists or add a new declaration (.d.ts) file containing `declare module '{0}';`"),
        Dynamic_import_s_specifier_must_be_of_type_string_but_here_has_type_0: diag(7036, ts.DiagnosticCategory.Error, "Dynamic_import_s_specifier_must_be_of_type_string_but_here_has_type_0_7036", "Dynamic import's specifier must be of type 'string', but here has type '{0}'."),
        Enables_emit_interoperability_between_CommonJS_and_ES_Modules_via_creation_of_namespace_objects_for_all_imports_Implies_allowSyntheticDefaultImports: diag(7037, ts.DiagnosticCategory.Message, "Enables_emit_interoperability_between_CommonJS_and_ES_Modules_via_creation_of_namespace_objects_for__7037", "Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'."),
        A_namespace_style_import_cannot_be_called_or_constructed_and_will_cause_a_failure_at_runtime: diag(7038, ts.DiagnosticCategory.Error, "A_namespace_style_import_cannot_be_called_or_constructed_and_will_cause_a_failure_at_runtime_7038", "A namespace-style import cannot be called or constructed, and will cause a failure at runtime."),
        Mapped_object_type_implicitly_has_an_any_template_type: diag(7039, ts.DiagnosticCategory.Error, "Mapped_object_type_implicitly_has_an_any_template_type_7039", "Mapped object type implicitly has an 'any' template type."),
        You_cannot_rename_this_element: diag(8000, ts.DiagnosticCategory.Error, "You_cannot_rename_this_element_8000", "You cannot rename this element."),
        You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library: diag(8001, ts.DiagnosticCategory.Error, "You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library_8001", "You cannot rename elements that are defined in the standard TypeScript library."),
        import_can_only_be_used_in_a_ts_file: diag(8002, ts.DiagnosticCategory.Error, "import_can_only_be_used_in_a_ts_file_8002", "'import ... =' can only be used in a .ts file."),
        export_can_only_be_used_in_a_ts_file: diag(8003, ts.DiagnosticCategory.Error, "export_can_only_be_used_in_a_ts_file_8003", "'export=' can only be used in a .ts file."),
        type_parameter_declarations_can_only_be_used_in_a_ts_file: diag(8004, ts.DiagnosticCategory.Error, "type_parameter_declarations_can_only_be_used_in_a_ts_file_8004", "'type parameter declarations' can only be used in a .ts file."),
        implements_clauses_can_only_be_used_in_a_ts_file: diag(8005, ts.DiagnosticCategory.Error, "implements_clauses_can_only_be_used_in_a_ts_file_8005", "'implements clauses' can only be used in a .ts file."),
        interface_declarations_can_only_be_used_in_a_ts_file: diag(8006, ts.DiagnosticCategory.Error, "interface_declarations_can_only_be_used_in_a_ts_file_8006", "'interface declarations' can only be used in a .ts file."),
        module_declarations_can_only_be_used_in_a_ts_file: diag(8007, ts.DiagnosticCategory.Error, "module_declarations_can_only_be_used_in_a_ts_file_8007", "'module declarations' can only be used in a .ts file."),
        type_aliases_can_only_be_used_in_a_ts_file: diag(8008, ts.DiagnosticCategory.Error, "type_aliases_can_only_be_used_in_a_ts_file_8008", "'type aliases' can only be used in a .ts file."),
        _0_can_only_be_used_in_a_ts_file: diag(8009, ts.DiagnosticCategory.Error, "_0_can_only_be_used_in_a_ts_file_8009", "'{0}' can only be used in a .ts file."),
        types_can_only_be_used_in_a_ts_file: diag(8010, ts.DiagnosticCategory.Error, "types_can_only_be_used_in_a_ts_file_8010", "'types' can only be used in a .ts file."),
        type_arguments_can_only_be_used_in_a_ts_file: diag(8011, ts.DiagnosticCategory.Error, "type_arguments_can_only_be_used_in_a_ts_file_8011", "'type arguments' can only be used in a .ts file."),
        parameter_modifiers_can_only_be_used_in_a_ts_file: diag(8012, ts.DiagnosticCategory.Error, "parameter_modifiers_can_only_be_used_in_a_ts_file_8012", "'parameter modifiers' can only be used in a .ts file."),
        non_null_assertions_can_only_be_used_in_a_ts_file: diag(8013, ts.DiagnosticCategory.Error, "non_null_assertions_can_only_be_used_in_a_ts_file_8013", "'non-null assertions' can only be used in a .ts file."),
        enum_declarations_can_only_be_used_in_a_ts_file: diag(8015, ts.DiagnosticCategory.Error, "enum_declarations_can_only_be_used_in_a_ts_file_8015", "'enum declarations' can only be used in a .ts file."),
        type_assertion_expressions_can_only_be_used_in_a_ts_file: diag(8016, ts.DiagnosticCategory.Error, "type_assertion_expressions_can_only_be_used_in_a_ts_file_8016", "'type assertion expressions' can only be used in a .ts file."),
        Octal_literal_types_must_use_ES2015_syntax_Use_the_syntax_0: diag(8017, ts.DiagnosticCategory.Error, "Octal_literal_types_must_use_ES2015_syntax_Use_the_syntax_0_8017", "Octal literal types must use ES2015 syntax. Use the syntax '{0}'."),
        Octal_literals_are_not_allowed_in_enums_members_initializer_Use_the_syntax_0: diag(8018, ts.DiagnosticCategory.Error, "Octal_literals_are_not_allowed_in_enums_members_initializer_Use_the_syntax_0_8018", "Octal literals are not allowed in enums members initializer. Use the syntax '{0}'."),
        Report_errors_in_js_files: diag(8019, ts.DiagnosticCategory.Message, "Report_errors_in_js_files_8019", "Report errors in .js files."),
        JSDoc_types_can_only_be_used_inside_documentation_comments: diag(8020, ts.DiagnosticCategory.Error, "JSDoc_types_can_only_be_used_inside_documentation_comments_8020", "JSDoc types can only be used inside documentation comments."),
        JSDoc_typedef_tag_should_either_have_a_type_annotation_or_be_followed_by_property_or_member_tags: diag(8021, ts.DiagnosticCategory.Error, "JSDoc_typedef_tag_should_either_have_a_type_annotation_or_be_followed_by_property_or_member_tags_8021", "JSDoc '@typedef' tag should either have a type annotation or be followed by '@property' or '@member' tags."),
        JSDoc_0_is_not_attached_to_a_class: diag(8022, ts.DiagnosticCategory.Error, "JSDoc_0_is_not_attached_to_a_class_8022", "JSDoc '@{0}' is not attached to a class."),
        JSDoc_0_1_does_not_match_the_extends_2_clause: diag(8023, ts.DiagnosticCategory.Error, "JSDoc_0_1_does_not_match_the_extends_2_clause_8023", "JSDoc '@{0} {1}' does not match the 'extends {2}' clause."),
        JSDoc_param_tag_has_name_0_but_there_is_no_parameter_with_that_name: diag(8024, ts.DiagnosticCategory.Error, "JSDoc_param_tag_has_name_0_but_there_is_no_parameter_with_that_name_8024", "JSDoc '@param' tag has name '{0}', but there is no parameter with that name."),
        Class_declarations_cannot_have_more_than_one_augments_or_extends_tag: diag(8025, ts.DiagnosticCategory.Error, "Class_declarations_cannot_have_more_than_one_augments_or_extends_tag_8025", "Class declarations cannot have more than one `@augments` or `@extends` tag."),
        Expected_0_type_arguments_provide_these_with_an_extends_tag: diag(8026, ts.DiagnosticCategory.Error, "Expected_0_type_arguments_provide_these_with_an_extends_tag_8026", "Expected {0} type arguments; provide these with an '@extends' tag."),
        Expected_0_1_type_arguments_provide_these_with_an_extends_tag: diag(8027, ts.DiagnosticCategory.Error, "Expected_0_1_type_arguments_provide_these_with_an_extends_tag_8027", "Expected {0}-{1} type arguments; provide these with an '@extends' tag."),
        JSDoc_may_only_appear_in_the_last_parameter_of_a_signature: diag(8028, ts.DiagnosticCategory.Error, "JSDoc_may_only_appear_in_the_last_parameter_of_a_signature_8028", "JSDoc '...' may only appear in the last parameter of a signature."),
        JSDoc_param_tag_has_name_0_but_there_is_no_parameter_with_that_name_It_would_match_arguments_if_it_had_an_array_type: diag(8029, ts.DiagnosticCategory.Error, "JSDoc_param_tag_has_name_0_but_there_is_no_parameter_with_that_name_It_would_match_arguments_if_it_h_8029", "JSDoc '@param' tag has name '{0}', but there is no parameter with that name. It would match 'arguments' if it had an array type."),
        Only_identifiers_Slashqualified_names_with_optional_type_arguments_are_currently_supported_in_a_class_extends_clause: diag(9002, ts.DiagnosticCategory.Error, "Only_identifiers_Slashqualified_names_with_optional_type_arguments_are_currently_supported_in_a_clas_9002", "Only identifiers/qualified-names with optional type arguments are currently supported in a class 'extends' clause."),
        class_expressions_are_not_currently_supported: diag(9003, ts.DiagnosticCategory.Error, "class_expressions_are_not_currently_supported_9003", "'class' expressions are not currently supported."),
        Language_service_is_disabled: diag(9004, ts.DiagnosticCategory.Error, "Language_service_is_disabled_9004", "Language service is disabled."),
        JSX_attributes_must_only_be_assigned_a_non_empty_expression: diag(17000, ts.DiagnosticCategory.Error, "JSX_attributes_must_only_be_assigned_a_non_empty_expression_17000", "JSX attributes must only be assigned a non-empty 'expression'."),
        JSX_elements_cannot_have_multiple_attributes_with_the_same_name: diag(17001, ts.DiagnosticCategory.Error, "JSX_elements_cannot_have_multiple_attributes_with_the_same_name_17001", "JSX elements cannot have multiple attributes with the same name."),
        Expected_corresponding_JSX_closing_tag_for_0: diag(17002, ts.DiagnosticCategory.Error, "Expected_corresponding_JSX_closing_tag_for_0_17002", "Expected corresponding JSX closing tag for '{0}'."),
        JSX_attribute_expected: diag(17003, ts.DiagnosticCategory.Error, "JSX_attribute_expected_17003", "JSX attribute expected."),
        Cannot_use_JSX_unless_the_jsx_flag_is_provided: diag(17004, ts.DiagnosticCategory.Error, "Cannot_use_JSX_unless_the_jsx_flag_is_provided_17004", "Cannot use JSX unless the '--jsx' flag is provided."),
        A_constructor_cannot_contain_a_super_call_when_its_class_extends_null: diag(17005, ts.DiagnosticCategory.Error, "A_constructor_cannot_contain_a_super_call_when_its_class_extends_null_17005", "A constructor cannot contain a 'super' call when its class extends 'null'."),
        An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses: diag(17006, ts.DiagnosticCategory.Error, "An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_ex_17006", "An unary expression with the '{0}' operator is not allowed in the left-hand side of an exponentiation expression. Consider enclosing the expression in parentheses."),
        A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses: diag(17007, ts.DiagnosticCategory.Error, "A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Con_17007", "A type assertion expression is not allowed in the left-hand side of an exponentiation expression. Consider enclosing the expression in parentheses."),
        JSX_element_0_has_no_corresponding_closing_tag: diag(17008, ts.DiagnosticCategory.Error, "JSX_element_0_has_no_corresponding_closing_tag_17008", "JSX element '{0}' has no corresponding closing tag."),
        super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class: diag(17009, ts.DiagnosticCategory.Error, "super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class_17009", "'super' must be called before accessing 'this' in the constructor of a derived class."),
        Unknown_type_acquisition_option_0: diag(17010, ts.DiagnosticCategory.Error, "Unknown_type_acquisition_option_0_17010", "Unknown type acquisition option '{0}'."),
        super_must_be_called_before_accessing_a_property_of_super_in_the_constructor_of_a_derived_class: diag(17011, ts.DiagnosticCategory.Error, "super_must_be_called_before_accessing_a_property_of_super_in_the_constructor_of_a_derived_class_17011", "'super' must be called before accessing a property of 'super' in the constructor of a derived class."),
        _0_is_not_a_valid_meta_property_for_keyword_1_Did_you_mean_2: diag(17012, ts.DiagnosticCategory.Error, "_0_is_not_a_valid_meta_property_for_keyword_1_Did_you_mean_2_17012", "'{0}' is not a valid meta-property for keyword '{1}'. Did you mean '{2}'?"),
        Meta_property_0_is_only_allowed_in_the_body_of_a_function_declaration_function_expression_or_constructor: diag(17013, ts.DiagnosticCategory.Error, "Meta_property_0_is_only_allowed_in_the_body_of_a_function_declaration_function_expression_or_constru_17013", "Meta-property '{0}' is only allowed in the body of a function declaration, function expression, or constructor."),
        JSX_fragment_has_no_corresponding_closing_tag: diag(17014, ts.DiagnosticCategory.Error, "JSX_fragment_has_no_corresponding_closing_tag_17014", "JSX fragment has no corresponding closing tag."),
        Expected_corresponding_closing_tag_for_JSX_fragment: diag(17015, ts.DiagnosticCategory.Error, "Expected_corresponding_closing_tag_for_JSX_fragment_17015", "Expected corresponding closing tag for JSX fragment."),
        JSX_fragment_is_not_supported_when_using_jsxFactory: diag(17016, ts.DiagnosticCategory.Error, "JSX_fragment_is_not_supported_when_using_jsxFactory_17016", "JSX fragment is not supported when using --jsxFactory"),
        JSX_fragment_is_not_supported_when_using_an_inline_JSX_factory_pragma: diag(17017, ts.DiagnosticCategory.Error, "JSX_fragment_is_not_supported_when_using_an_inline_JSX_factory_pragma_17017", "JSX fragment is not supported when using an inline JSX factory pragma"),
        Circularity_detected_while_resolving_configuration_Colon_0: diag(18000, ts.DiagnosticCategory.Error, "Circularity_detected_while_resolving_configuration_Colon_0_18000", "Circularity detected while resolving configuration: {0}"),
        A_path_in_an_extends_option_must_be_relative_or_rooted_but_0_is_not: diag(18001, ts.DiagnosticCategory.Error, "A_path_in_an_extends_option_must_be_relative_or_rooted_but_0_is_not_18001", "A path in an 'extends' option must be relative or rooted, but '{0}' is not."),
        The_files_list_in_config_file_0_is_empty: diag(18002, ts.DiagnosticCategory.Error, "The_files_list_in_config_file_0_is_empty_18002", "The 'files' list in config file '{0}' is empty."),
        No_inputs_were_found_in_config_file_0_Specified_include_paths_were_1_and_exclude_paths_were_2: diag(18003, ts.DiagnosticCategory.Error, "No_inputs_were_found_in_config_file_0_Specified_include_paths_were_1_and_exclude_paths_were_2_18003", "No inputs were found in config file '{0}'. Specified 'include' paths were '{1}' and 'exclude' paths were '{2}'."),
        File_is_a_CommonJS_module_it_may_be_converted_to_an_ES6_module: diag(80001, ts.DiagnosticCategory.Suggestion, "File_is_a_CommonJS_module_it_may_be_converted_to_an_ES6_module_80001", "File is a CommonJS module; it may be converted to an ES6 module."),
        This_constructor_function_may_be_converted_to_a_class_declaration: diag(80002, ts.DiagnosticCategory.Suggestion, "This_constructor_function_may_be_converted_to_a_class_declaration_80002", "This constructor function may be converted to a class declaration."),
        Import_may_be_converted_to_a_default_import: diag(80003, ts.DiagnosticCategory.Suggestion, "Import_may_be_converted_to_a_default_import_80003", "Import may be converted to a default import."),
        JSDoc_types_may_be_moved_to_TypeScript_types: diag(80004, ts.DiagnosticCategory.Suggestion, "JSDoc_types_may_be_moved_to_TypeScript_types_80004", "JSDoc types may be moved to TypeScript types."),
        require_call_may_be_converted_to_an_import: diag(80005, ts.DiagnosticCategory.Suggestion, "require_call_may_be_converted_to_an_import_80005", "'require' call may be converted to an import."),
        Add_missing_super_call: diag(90001, ts.DiagnosticCategory.Message, "Add_missing_super_call_90001", "Add missing 'super()' call"),
        Make_super_call_the_first_statement_in_the_constructor: diag(90002, ts.DiagnosticCategory.Message, "Make_super_call_the_first_statement_in_the_constructor_90002", "Make 'super()' call the first statement in the constructor"),
        Change_extends_to_implements: diag(90003, ts.DiagnosticCategory.Message, "Change_extends_to_implements_90003", "Change 'extends' to 'implements'"),
        Remove_declaration_for_Colon_0: diag(90004, ts.DiagnosticCategory.Message, "Remove_declaration_for_Colon_0_90004", "Remove declaration for: '{0}'"),
        Remove_import_from_0: diag(90005, ts.DiagnosticCategory.Message, "Remove_import_from_0_90005", "Remove import from '{0}'"),
        Implement_interface_0: diag(90006, ts.DiagnosticCategory.Message, "Implement_interface_0_90006", "Implement interface '{0}'"),
        Implement_inherited_abstract_class: diag(90007, ts.DiagnosticCategory.Message, "Implement_inherited_abstract_class_90007", "Implement inherited abstract class"),
        Add_0_to_unresolved_variable: diag(90008, ts.DiagnosticCategory.Message, "Add_0_to_unresolved_variable_90008", "Add '{0}.' to unresolved variable"),
        Remove_destructuring: diag(90009, ts.DiagnosticCategory.Message, "Remove_destructuring_90009", "Remove destructuring"),
        Remove_variable_statement: diag(90010, ts.DiagnosticCategory.Message, "Remove_variable_statement_90010", "Remove variable statement"),
        Import_0_from_module_1: diag(90013, ts.DiagnosticCategory.Message, "Import_0_from_module_1_90013", "Import '{0}' from module \"{1}\""),
        Change_0_to_1: diag(90014, ts.DiagnosticCategory.Message, "Change_0_to_1_90014", "Change '{0}' to '{1}'"),
        Add_0_to_existing_import_declaration_from_1: diag(90015, ts.DiagnosticCategory.Message, "Add_0_to_existing_import_declaration_from_1_90015", "Add '{0}' to existing import declaration from \"{1}\""),
        Declare_property_0: diag(90016, ts.DiagnosticCategory.Message, "Declare_property_0_90016", "Declare property '{0}'"),
        Add_index_signature_for_property_0: diag(90017, ts.DiagnosticCategory.Message, "Add_index_signature_for_property_0_90017", "Add index signature for property '{0}'"),
        Disable_checking_for_this_file: diag(90018, ts.DiagnosticCategory.Message, "Disable_checking_for_this_file_90018", "Disable checking for this file"),
        Ignore_this_error_message: diag(90019, ts.DiagnosticCategory.Message, "Ignore_this_error_message_90019", "Ignore this error message"),
        Initialize_property_0_in_the_constructor: diag(90020, ts.DiagnosticCategory.Message, "Initialize_property_0_in_the_constructor_90020", "Initialize property '{0}' in the constructor"),
        Initialize_static_property_0: diag(90021, ts.DiagnosticCategory.Message, "Initialize_static_property_0_90021", "Initialize static property '{0}'"),
        Change_spelling_to_0: diag(90022, ts.DiagnosticCategory.Message, "Change_spelling_to_0_90022", "Change spelling to '{0}'"),
        Declare_method_0: diag(90023, ts.DiagnosticCategory.Message, "Declare_method_0_90023", "Declare method '{0}'"),
        Declare_static_method_0: diag(90024, ts.DiagnosticCategory.Message, "Declare_static_method_0_90024", "Declare static method '{0}'"),
        Prefix_0_with_an_underscore: diag(90025, ts.DiagnosticCategory.Message, "Prefix_0_with_an_underscore_90025", "Prefix '{0}' with an underscore"),
        Rewrite_as_the_indexed_access_type_0: diag(90026, ts.DiagnosticCategory.Message, "Rewrite_as_the_indexed_access_type_0_90026", "Rewrite as the indexed access type '{0}'"),
        Declare_static_property_0: diag(90027, ts.DiagnosticCategory.Message, "Declare_static_property_0_90027", "Declare static property '{0}'"),
        Call_decorator_expression: diag(90028, ts.DiagnosticCategory.Message, "Call_decorator_expression_90028", "Call decorator expression"),
        Add_async_modifier_to_containing_function: diag(90029, ts.DiagnosticCategory.Message, "Add_async_modifier_to_containing_function_90029", "Add async modifier to containing function"),
        Convert_function_to_an_ES2015_class: diag(95001, ts.DiagnosticCategory.Message, "Convert_function_to_an_ES2015_class_95001", "Convert function to an ES2015 class"),
        Convert_function_0_to_class: diag(95002, ts.DiagnosticCategory.Message, "Convert_function_0_to_class_95002", "Convert function '{0}' to class"),
        Extract_to_0_in_1: diag(95004, ts.DiagnosticCategory.Message, "Extract_to_0_in_1_95004", "Extract to {0} in {1}"),
        Extract_function: diag(95005, ts.DiagnosticCategory.Message, "Extract_function_95005", "Extract function"),
        Extract_constant: diag(95006, ts.DiagnosticCategory.Message, "Extract_constant_95006", "Extract constant"),
        Extract_to_0_in_enclosing_scope: diag(95007, ts.DiagnosticCategory.Message, "Extract_to_0_in_enclosing_scope_95007", "Extract to {0} in enclosing scope"),
        Extract_to_0_in_1_scope: diag(95008, ts.DiagnosticCategory.Message, "Extract_to_0_in_1_scope_95008", "Extract to {0} in {1} scope"),
        Annotate_with_type_from_JSDoc: diag(95009, ts.DiagnosticCategory.Message, "Annotate_with_type_from_JSDoc_95009", "Annotate with type from JSDoc"),
        Annotate_with_types_from_JSDoc: diag(95010, ts.DiagnosticCategory.Message, "Annotate_with_types_from_JSDoc_95010", "Annotate with types from JSDoc"),
        Infer_type_of_0_from_usage: diag(95011, ts.DiagnosticCategory.Message, "Infer_type_of_0_from_usage_95011", "Infer type of '{0}' from usage"),
        Infer_parameter_types_from_usage: diag(95012, ts.DiagnosticCategory.Message, "Infer_parameter_types_from_usage_95012", "Infer parameter types from usage"),
        Convert_to_default_import: diag(95013, ts.DiagnosticCategory.Message, "Convert_to_default_import_95013", "Convert to default import"),
        Install_0: diag(95014, ts.DiagnosticCategory.Message, "Install_0_95014", "Install '{0}'"),
        Replace_import_with_0: diag(95015, ts.DiagnosticCategory.Message, "Replace_import_with_0_95015", "Replace import with '{0}'."),
        Use_synthetic_default_member: diag(95016, ts.DiagnosticCategory.Message, "Use_synthetic_default_member_95016", "Use synthetic 'default' member."),
        Convert_to_ES6_module: diag(95017, ts.DiagnosticCategory.Message, "Convert_to_ES6_module_95017", "Convert to ES6 module"),
        Add_undefined_type_to_property_0: diag(95018, ts.DiagnosticCategory.Message, "Add_undefined_type_to_property_0_95018", "Add 'undefined' type to property '{0}'"),
        Add_initializer_to_property_0: diag(95019, ts.DiagnosticCategory.Message, "Add_initializer_to_property_0_95019", "Add initializer to property '{0}'"),
        Add_definite_assignment_assertion_to_property_0: diag(95020, ts.DiagnosticCategory.Message, "Add_definite_assignment_assertion_to_property_0_95020", "Add definite assignment assertion to property '{0}'"),
        Add_all_missing_members: diag(95022, ts.DiagnosticCategory.Message, "Add_all_missing_members_95022", "Add all missing members"),
        Infer_all_types_from_usage: diag(95023, ts.DiagnosticCategory.Message, "Infer_all_types_from_usage_95023", "Infer all types from usage"),
        Delete_all_unused_declarations: diag(95024, ts.DiagnosticCategory.Message, "Delete_all_unused_declarations_95024", "Delete all unused declarations"),
        Prefix_all_unused_declarations_with_where_possible: diag(95025, ts.DiagnosticCategory.Message, "Prefix_all_unused_declarations_with_where_possible_95025", "Prefix all unused declarations with '_' where possible"),
        Fix_all_detected_spelling_errors: diag(95026, ts.DiagnosticCategory.Message, "Fix_all_detected_spelling_errors_95026", "Fix all detected spelling errors"),
        Add_initializers_to_all_uninitialized_properties: diag(95027, ts.DiagnosticCategory.Message, "Add_initializers_to_all_uninitialized_properties_95027", "Add initializers to all uninitialized properties"),
        Add_definite_assignment_assertions_to_all_uninitialized_properties: diag(95028, ts.DiagnosticCategory.Message, "Add_definite_assignment_assertions_to_all_uninitialized_properties_95028", "Add definite assignment assertions to all uninitialized properties"),
        Add_undefined_type_to_all_uninitialized_properties: diag(95029, ts.DiagnosticCategory.Message, "Add_undefined_type_to_all_uninitialized_properties_95029", "Add undefined type to all uninitialized properties"),
        Change_all_jsdoc_style_types_to_TypeScript: diag(95030, ts.DiagnosticCategory.Message, "Change_all_jsdoc_style_types_to_TypeScript_95030", "Change all jsdoc-style types to TypeScript"),
        Change_all_jsdoc_style_types_to_TypeScript_and_add_undefined_to_nullable_types: diag(95031, ts.DiagnosticCategory.Message, "Change_all_jsdoc_style_types_to_TypeScript_and_add_undefined_to_nullable_types_95031", "Change all jsdoc-style types to TypeScript (and add '| undefined' to nullable types)"),
        Implement_all_unimplemented_interfaces: diag(95032, ts.DiagnosticCategory.Message, "Implement_all_unimplemented_interfaces_95032", "Implement all unimplemented interfaces"),
        Install_all_missing_types_packages: diag(95033, ts.DiagnosticCategory.Message, "Install_all_missing_types_packages_95033", "Install all missing types packages"),
        Rewrite_all_as_indexed_access_types: diag(95034, ts.DiagnosticCategory.Message, "Rewrite_all_as_indexed_access_types_95034", "Rewrite all as indexed access types"),
        Convert_all_to_default_imports: diag(95035, ts.DiagnosticCategory.Message, "Convert_all_to_default_imports_95035", "Convert all to default imports"),
        Make_all_super_calls_the_first_statement_in_their_constructor: diag(95036, ts.DiagnosticCategory.Message, "Make_all_super_calls_the_first_statement_in_their_constructor_95036", "Make all 'super()' calls the first statement in their constructor"),
        Add_qualifier_to_all_unresolved_variables_matching_a_member_name: diag(95037, ts.DiagnosticCategory.Message, "Add_qualifier_to_all_unresolved_variables_matching_a_member_name_95037", "Add qualifier to all unresolved variables matching a member name"),
        Change_all_extended_interfaces_to_implements: diag(95038, ts.DiagnosticCategory.Message, "Change_all_extended_interfaces_to_implements_95038", "Change all extended interfaces to 'implements'"),
        Add_all_missing_super_calls: diag(95039, ts.DiagnosticCategory.Message, "Add_all_missing_super_calls_95039", "Add all missing super calls"),
        Implement_all_inherited_abstract_classes: diag(95040, ts.DiagnosticCategory.Message, "Implement_all_inherited_abstract_classes_95040", "Implement all inherited abstract classes"),
        Add_all_missing_async_modifiers: diag(95041, ts.DiagnosticCategory.Message, "Add_all_missing_async_modifiers_95041", "Add all missing 'async' modifiers"),
        Add_ts_ignore_to_all_error_messages: diag(95042, ts.DiagnosticCategory.Message, "Add_ts_ignore_to_all_error_messages_95042", "Add '@ts-ignore' to all error messages"),
        Annotate_everything_with_types_from_JSDoc: diag(95043, ts.DiagnosticCategory.Message, "Annotate_everything_with_types_from_JSDoc_95043", "Annotate everything with types from JSDoc"),
        Add_to_all_uncalled_decorators: diag(95044, ts.DiagnosticCategory.Message, "Add_to_all_uncalled_decorators_95044", "Add '()' to all uncalled decorators"),
        Convert_all_constructor_functions_to_classes: diag(95045, ts.DiagnosticCategory.Message, "Convert_all_constructor_functions_to_classes_95045", "Convert all constructor functions to classes"),
        Generate_get_and_set_accessors: diag(95046, ts.DiagnosticCategory.Message, "Generate_get_and_set_accessors_95046", "Generate 'get' and 'set' accessors"),
        Convert_require_to_import: diag(95047, ts.DiagnosticCategory.Message, "Convert_require_to_import_95047", "Convert 'require' to 'import'"),
        Convert_all_require_to_import: diag(95048, ts.DiagnosticCategory.Message, "Convert_all_require_to_import_95048", "Convert all 'require' to 'import'"),
        Move_to_a_new_file: diag(95049, ts.DiagnosticCategory.Message, "Move_to_a_new_file_95049", "Move to a new file"),
        Remove_unreachable_code: diag(95050, ts.DiagnosticCategory.Message, "Remove_unreachable_code_95050", "Remove unreachable code"),
        Remove_all_unreachable_code: diag(95051, ts.DiagnosticCategory.Message, "Remove_all_unreachable_code_95051", "Remove all unreachable code"),
        Add_missing_typeof: diag(95052, ts.DiagnosticCategory.Message, "Add_missing_typeof_95052", "Add missing 'typeof'"),
        Remove_unused_label: diag(95053, ts.DiagnosticCategory.Message, "Remove_unused_label_95053", "Remove unused label"),
        Remove_all_unused_labels: diag(95054, ts.DiagnosticCategory.Message, "Remove_all_unused_labels_95054", "Remove all unused labels"),
        Convert_0_to_mapped_object_type: diag(95055, ts.DiagnosticCategory.Message, "Convert_0_to_mapped_object_type_95055", "Convert '{0}' to mapped object type"),
        Convert_namespace_import_to_named_imports: diag(95056, ts.DiagnosticCategory.Message, "Convert_namespace_import_to_named_imports_95056", "Convert namespace import to named imports"),
        Convert_named_imports_to_namespace_import: diag(95057, ts.DiagnosticCategory.Message, "Convert_named_imports_to_namespace_import_95057", "Convert named imports to namespace import"),
        Add_or_remove_braces_in_an_arrow_function: diag(95058, ts.DiagnosticCategory.Message, "Add_or_remove_braces_in_an_arrow_function_95058", "Add or remove braces in an arrow function"),
        Add_braces_to_arrow_function: diag(95059, ts.DiagnosticCategory.Message, "Add_braces_to_arrow_function_95059", "Add braces to arrow function"),
        Remove_braces_from_arrow_function: diag(95060, ts.DiagnosticCategory.Message, "Remove_braces_from_arrow_function_95060", "Remove braces from arrow function"),
    };
})(ts || (ts = {}));
var ts;
(function (ts) {
    /* @internal */
    function tokenIsIdentifierOrKeyword(token) {
        return token >= 71 /* Identifier */;
    }
    ts.tokenIsIdentifierOrKeyword = tokenIsIdentifierOrKeyword;
    /* @internal */
    function tokenIsIdentifierOrKeywordOrGreaterThan(token) {
        return token === 29 /* GreaterThanToken */ || tokenIsIdentifierOrKeyword(token);
    }
    ts.tokenIsIdentifierOrKeywordOrGreaterThan = tokenIsIdentifierOrKeywordOrGreaterThan;
    var textToToken = ts.createMapFromTemplate({
        "abstract": 117 /* AbstractKeyword */,
        "any": 119 /* AnyKeyword */,
        "as": 118 /* AsKeyword */,
        "boolean": 122 /* BooleanKeyword */,
        "break": 72 /* BreakKeyword */,
        "case": 73 /* CaseKeyword */,
        "catch": 74 /* CatchKeyword */,
        "class": 75 /* ClassKeyword */,
        "continue": 77 /* ContinueKeyword */,
        "const": 76 /* ConstKeyword */,
        "constructor": 123 /* ConstructorKeyword */,
        "debugger": 78 /* DebuggerKeyword */,
        "declare": 124 /* DeclareKeyword */,
        "default": 79 /* DefaultKeyword */,
        "delete": 80 /* DeleteKeyword */,
        "do": 81 /* DoKeyword */,
        "else": 82 /* ElseKeyword */,
        "enum": 83 /* EnumKeyword */,
        "export": 84 /* ExportKeyword */,
        "extends": 85 /* ExtendsKeyword */,
        "false": 86 /* FalseKeyword */,
        "finally": 87 /* FinallyKeyword */,
        "for": 88 /* ForKeyword */,
        "from": 143 /* FromKeyword */,
        "function": 89 /* FunctionKeyword */,
        "get": 125 /* GetKeyword */,
        "if": 90 /* IfKeyword */,
        "implements": 108 /* ImplementsKeyword */,
        "import": 91 /* ImportKeyword */,
        "in": 92 /* InKeyword */,
        "infer": 126 /* InferKeyword */,
        "instanceof": 93 /* InstanceOfKeyword */,
        "interface": 109 /* InterfaceKeyword */,
        "is": 127 /* IsKeyword */,
        "keyof": 128 /* KeyOfKeyword */,
        "let": 110 /* LetKeyword */,
        "module": 129 /* ModuleKeyword */,
        "namespace": 130 /* NamespaceKeyword */,
        "never": 131 /* NeverKeyword */,
        "new": 94 /* NewKeyword */,
        "null": 95 /* NullKeyword */,
        "number": 134 /* NumberKeyword */,
        "object": 135 /* ObjectKeyword */,
        "package": 111 /* PackageKeyword */,
        "private": 112 /* PrivateKeyword */,
        "protected": 113 /* ProtectedKeyword */,
        "public": 114 /* PublicKeyword */,
        "readonly": 132 /* ReadonlyKeyword */,
        "require": 133 /* RequireKeyword */,
        "global": 144 /* GlobalKeyword */,
        "return": 96 /* ReturnKeyword */,
        "set": 136 /* SetKeyword */,
        "static": 115 /* StaticKeyword */,
        "string": 137 /* StringKeyword */,
        "super": 97 /* SuperKeyword */,
        "switch": 98 /* SwitchKeyword */,
        "symbol": 138 /* SymbolKeyword */,
        "this": 99 /* ThisKeyword */,
        "throw": 100 /* ThrowKeyword */,
        "true": 101 /* TrueKeyword */,
        "try": 102 /* TryKeyword */,
        "type": 139 /* TypeKeyword */,
        "typeof": 103 /* TypeOfKeyword */,
        "undefined": 140 /* UndefinedKeyword */,
        "unique": 141 /* UniqueKeyword */,
        "unknown": 142 /* UnknownKeyword */,
        "var": 104 /* VarKeyword */,
        "void": 105 /* VoidKeyword */,
        "while": 106 /* WhileKeyword */,
        "with": 107 /* WithKeyword */,
        "yield": 116 /* YieldKeyword */,
        "async": 120 /* AsyncKeyword */,
        "await": 121 /* AwaitKeyword */,
        "of": 145 /* OfKeyword */,
        "{": 17 /* OpenBraceToken */,
        "}": 18 /* CloseBraceToken */,
        "(": 19 /* OpenParenToken */,
        ")": 20 /* CloseParenToken */,
        "[": 21 /* OpenBracketToken */,
        "]": 22 /* CloseBracketToken */,
        ".": 23 /* DotToken */,
        "...": 24 /* DotDotDotToken */,
        ";": 25 /* SemicolonToken */,
        ",": 26 /* CommaToken */,
        "<": 27 /* LessThanToken */,
        ">": 29 /* GreaterThanToken */,
        "<=": 30 /* LessThanEqualsToken */,
        ">=": 31 /* GreaterThanEqualsToken */,
        "==": 32 /* EqualsEqualsToken */,
        "!=": 33 /* ExclamationEqualsToken */,
        "===": 34 /* EqualsEqualsEqualsToken */,
        "!==": 35 /* ExclamationEqualsEqualsToken */,
        "=>": 36 /* EqualsGreaterThanToken */,
        "+": 37 /* PlusToken */,
        "-": 38 /* MinusToken */,
        "**": 40 /* AsteriskAsteriskToken */,
        "*": 39 /* AsteriskToken */,
        "/": 41 /* SlashToken */,
        "%": 42 /* PercentToken */,
        "++": 43 /* PlusPlusToken */,
        "--": 44 /* MinusMinusToken */,
        "<<": 45 /* LessThanLessThanToken */,
        "</": 28 /* LessThanSlashToken */,
        ">>": 46 /* GreaterThanGreaterThanToken */,
        ">>>": 47 /* GreaterThanGreaterThanGreaterThanToken */,
        "&": 48 /* AmpersandToken */,
        "|": 49 /* BarToken */,
        "^": 50 /* CaretToken */,
        "!": 51 /* ExclamationToken */,
        "~": 52 /* TildeToken */,
        "&&": 53 /* AmpersandAmpersandToken */,
        "||": 54 /* BarBarToken */,
        "?": 55 /* QuestionToken */,
        ":": 56 /* ColonToken */,
        "=": 58 /* EqualsToken */,
        "+=": 59 /* PlusEqualsToken */,
        "-=": 60 /* MinusEqualsToken */,
        "*=": 61 /* AsteriskEqualsToken */,
        "**=": 62 /* AsteriskAsteriskEqualsToken */,
        "/=": 63 /* SlashEqualsToken */,
        "%=": 64 /* PercentEqualsToken */,
        "<<=": 65 /* LessThanLessThanEqualsToken */,
        ">>=": 66 /* GreaterThanGreaterThanEqualsToken */,
        ">>>=": 67 /* GreaterThanGreaterThanGreaterThanEqualsToken */,
        "&=": 68 /* AmpersandEqualsToken */,
        "|=": 69 /* BarEqualsToken */,
        "^=": 70 /* CaretEqualsToken */,
        "@": 57 /* AtToken */,
    });
    /*
        As per ECMAScript Language Specification 3th Edition, Section 7.6: Identifiers
        IdentifierStart ::
            Can contain Unicode 3.0.0 categories:
            Uppercase letter (Lu),
            Lowercase letter (Ll),
            Titlecase letter (Lt),
            Modifier letter (Lm),
            Other letter (Lo), or
            Letter number (Nl).
        IdentifierPart :: =
            Can contain IdentifierStart + Unicode 3.0.0 categories:
            Non-spacing mark (Mn),
            Combining spacing mark (Mc),
            Decimal number (Nd), or
            Connector punctuation (Pc).

        Codepoint ranges for ES3 Identifiers are extracted from the Unicode 3.0.0 specification at:
        http://www.unicode.org/Public/3.0-Update/UnicodeData-3.0.0.txt
    */
    var unicodeES3IdentifierStart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 543, 546, 563, 592, 685, 688, 696, 699, 705, 720, 721, 736, 740, 750, 750, 890, 890, 902, 902, 904, 906, 908, 908, 910, 929, 931, 974, 976, 983, 986, 1011, 1024, 1153, 1164, 1220, 1223, 1224, 1227, 1228, 1232, 1269, 1272, 1273, 1329, 1366, 1369, 1369, 1377, 1415, 1488, 1514, 1520, 1522, 1569, 1594, 1600, 1610, 1649, 1747, 1749, 1749, 1765, 1766, 1786, 1788, 1808, 1808, 1810, 1836, 1920, 1957, 2309, 2361, 2365, 2365, 2384, 2384, 2392, 2401, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2524, 2525, 2527, 2529, 2544, 2545, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2649, 2652, 2654, 2654, 2674, 2676, 2693, 2699, 2701, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2749, 2749, 2768, 2768, 2784, 2784, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2870, 2873, 2877, 2877, 2908, 2909, 2911, 2913, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 2997, 2999, 3001, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3168, 3169, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3294, 3294, 3296, 3297, 3333, 3340, 3342, 3344, 3346, 3368, 3370, 3385, 3424, 3425, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3585, 3632, 3634, 3635, 3648, 3654, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3760, 3762, 3763, 3773, 3773, 3776, 3780, 3782, 3782, 3804, 3805, 3840, 3840, 3904, 3911, 3913, 3946, 3976, 3979, 4096, 4129, 4131, 4135, 4137, 4138, 4176, 4181, 4256, 4293, 4304, 4342, 4352, 4441, 4447, 4514, 4520, 4601, 4608, 4614, 4616, 4678, 4680, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4742, 4744, 4744, 4746, 4749, 4752, 4782, 4784, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4814, 4816, 4822, 4824, 4846, 4848, 4878, 4880, 4880, 4882, 4885, 4888, 4894, 4896, 4934, 4936, 4954, 5024, 5108, 5121, 5740, 5743, 5750, 5761, 5786, 5792, 5866, 6016, 6067, 6176, 6263, 6272, 6312, 7680, 7835, 7840, 7929, 7936, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8319, 8319, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8497, 8499, 8505, 8544, 8579, 12293, 12295, 12321, 12329, 12337, 12341, 12344, 12346, 12353, 12436, 12445, 12446, 12449, 12538, 12540, 12542, 12549, 12588, 12593, 12686, 12704, 12727, 13312, 19893, 19968, 40869, 40960, 42124, 44032, 55203, 63744, 64045, 64256, 64262, 64275, 64279, 64285, 64285, 64287, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65136, 65138, 65140, 65140, 65142, 65276, 65313, 65338, 65345, 65370, 65382, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
    var unicodeES3IdentifierPart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 543, 546, 563, 592, 685, 688, 696, 699, 705, 720, 721, 736, 740, 750, 750, 768, 846, 864, 866, 890, 890, 902, 902, 904, 906, 908, 908, 910, 929, 931, 974, 976, 983, 986, 1011, 1024, 1153, 1155, 1158, 1164, 1220, 1223, 1224, 1227, 1228, 1232, 1269, 1272, 1273, 1329, 1366, 1369, 1369, 1377, 1415, 1425, 1441, 1443, 1465, 1467, 1469, 1471, 1471, 1473, 1474, 1476, 1476, 1488, 1514, 1520, 1522, 1569, 1594, 1600, 1621, 1632, 1641, 1648, 1747, 1749, 1756, 1759, 1768, 1770, 1773, 1776, 1788, 1808, 1836, 1840, 1866, 1920, 1968, 2305, 2307, 2309, 2361, 2364, 2381, 2384, 2388, 2392, 2403, 2406, 2415, 2433, 2435, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2492, 2492, 2494, 2500, 2503, 2504, 2507, 2509, 2519, 2519, 2524, 2525, 2527, 2531, 2534, 2545, 2562, 2562, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2620, 2620, 2622, 2626, 2631, 2632, 2635, 2637, 2649, 2652, 2654, 2654, 2662, 2676, 2689, 2691, 2693, 2699, 2701, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2748, 2757, 2759, 2761, 2763, 2765, 2768, 2768, 2784, 2784, 2790, 2799, 2817, 2819, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2870, 2873, 2876, 2883, 2887, 2888, 2891, 2893, 2902, 2903, 2908, 2909, 2911, 2913, 2918, 2927, 2946, 2947, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 2997, 2999, 3001, 3006, 3010, 3014, 3016, 3018, 3021, 3031, 3031, 3047, 3055, 3073, 3075, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3134, 3140, 3142, 3144, 3146, 3149, 3157, 3158, 3168, 3169, 3174, 3183, 3202, 3203, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3262, 3268, 3270, 3272, 3274, 3277, 3285, 3286, 3294, 3294, 3296, 3297, 3302, 3311, 3330, 3331, 3333, 3340, 3342, 3344, 3346, 3368, 3370, 3385, 3390, 3395, 3398, 3400, 3402, 3405, 3415, 3415, 3424, 3425, 3430, 3439, 3458, 3459, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3530, 3530, 3535, 3540, 3542, 3542, 3544, 3551, 3570, 3571, 3585, 3642, 3648, 3662, 3664, 3673, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3769, 3771, 3773, 3776, 3780, 3782, 3782, 3784, 3789, 3792, 3801, 3804, 3805, 3840, 3840, 3864, 3865, 3872, 3881, 3893, 3893, 3895, 3895, 3897, 3897, 3902, 3911, 3913, 3946, 3953, 3972, 3974, 3979, 3984, 3991, 3993, 4028, 4038, 4038, 4096, 4129, 4131, 4135, 4137, 4138, 4140, 4146, 4150, 4153, 4160, 4169, 4176, 4185, 4256, 4293, 4304, 4342, 4352, 4441, 4447, 4514, 4520, 4601, 4608, 4614, 4616, 4678, 4680, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4742, 4744, 4744, 4746, 4749, 4752, 4782, 4784, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4814, 4816, 4822, 4824, 4846, 4848, 4878, 4880, 4880, 4882, 4885, 4888, 4894, 4896, 4934, 4936, 4954, 4969, 4977, 5024, 5108, 5121, 5740, 5743, 5750, 5761, 5786, 5792, 5866, 6016, 6099, 6112, 6121, 6160, 6169, 6176, 6263, 6272, 6313, 7680, 7835, 7840, 7929, 7936, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8255, 8256, 8319, 8319, 8400, 8412, 8417, 8417, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8497, 8499, 8505, 8544, 8579, 12293, 12295, 12321, 12335, 12337, 12341, 12344, 12346, 12353, 12436, 12441, 12442, 12445, 12446, 12449, 12542, 12549, 12588, 12593, 12686, 12704, 12727, 13312, 19893, 19968, 40869, 40960, 42124, 44032, 55203, 63744, 64045, 64256, 64262, 64275, 64279, 64285, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65056, 65059, 65075, 65076, 65101, 65103, 65136, 65138, 65140, 65140, 65142, 65276, 65296, 65305, 65313, 65338, 65343, 65343, 65345, 65370, 65381, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
    /*
        As per ECMAScript Language Specification 5th Edition, Section 7.6: ISyntaxToken Names and Identifiers
        IdentifierStart ::
            Can contain Unicode 6.2 categories:
            Uppercase letter (Lu),
            Lowercase letter (Ll),
            Titlecase letter (Lt),
            Modifier letter (Lm),
            Other letter (Lo), or
            Letter number (Nl).
        IdentifierPart ::
            Can contain IdentifierStart + Unicode 6.2 categories:
            Non-spacing mark (Mn),
            Combining spacing mark (Mc),
            Decimal number (Nd),
            Connector punctuation (Pc),
            <ZWNJ>, or
            <ZWJ>.

        Codepoint ranges for ES5 Identifiers are extracted from the Unicode 6.2 specification at:
        http://www.unicode.org/Public/6.2.0/ucd/UnicodeData.txt
    */
    var unicodeES5IdentifierStart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 705, 710, 721, 736, 740, 748, 748, 750, 750, 880, 884, 886, 887, 890, 893, 902, 902, 904, 906, 908, 908, 910, 929, 931, 1013, 1015, 1153, 1162, 1319, 1329, 1366, 1369, 1369, 1377, 1415, 1488, 1514, 1520, 1522, 1568, 1610, 1646, 1647, 1649, 1747, 1749, 1749, 1765, 1766, 1774, 1775, 1786, 1788, 1791, 1791, 1808, 1808, 1810, 1839, 1869, 1957, 1969, 1969, 1994, 2026, 2036, 2037, 2042, 2042, 2048, 2069, 2074, 2074, 2084, 2084, 2088, 2088, 2112, 2136, 2208, 2208, 2210, 2220, 2308, 2361, 2365, 2365, 2384, 2384, 2392, 2401, 2417, 2423, 2425, 2431, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2493, 2493, 2510, 2510, 2524, 2525, 2527, 2529, 2544, 2545, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2649, 2652, 2654, 2654, 2674, 2676, 2693, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2749, 2749, 2768, 2768, 2784, 2785, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2869, 2873, 2877, 2877, 2908, 2909, 2911, 2913, 2929, 2929, 2947, 2947, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 3001, 3024, 3024, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3133, 3133, 3160, 3161, 3168, 3169, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3261, 3261, 3294, 3294, 3296, 3297, 3313, 3314, 3333, 3340, 3342, 3344, 3346, 3386, 3389, 3389, 3406, 3406, 3424, 3425, 3450, 3455, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3585, 3632, 3634, 3635, 3648, 3654, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3760, 3762, 3763, 3773, 3773, 3776, 3780, 3782, 3782, 3804, 3807, 3840, 3840, 3904, 3911, 3913, 3948, 3976, 3980, 4096, 4138, 4159, 4159, 4176, 4181, 4186, 4189, 4193, 4193, 4197, 4198, 4206, 4208, 4213, 4225, 4238, 4238, 4256, 4293, 4295, 4295, 4301, 4301, 4304, 4346, 4348, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4744, 4746, 4749, 4752, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4822, 4824, 4880, 4882, 4885, 4888, 4954, 4992, 5007, 5024, 5108, 5121, 5740, 5743, 5759, 5761, 5786, 5792, 5866, 5870, 5872, 5888, 5900, 5902, 5905, 5920, 5937, 5952, 5969, 5984, 5996, 5998, 6000, 6016, 6067, 6103, 6103, 6108, 6108, 6176, 6263, 6272, 6312, 6314, 6314, 6320, 6389, 6400, 6428, 6480, 6509, 6512, 6516, 6528, 6571, 6593, 6599, 6656, 6678, 6688, 6740, 6823, 6823, 6917, 6963, 6981, 6987, 7043, 7072, 7086, 7087, 7098, 7141, 7168, 7203, 7245, 7247, 7258, 7293, 7401, 7404, 7406, 7409, 7413, 7414, 7424, 7615, 7680, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8305, 8305, 8319, 8319, 8336, 8348, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8505, 8508, 8511, 8517, 8521, 8526, 8526, 8544, 8584, 11264, 11310, 11312, 11358, 11360, 11492, 11499, 11502, 11506, 11507, 11520, 11557, 11559, 11559, 11565, 11565, 11568, 11623, 11631, 11631, 11648, 11670, 11680, 11686, 11688, 11694, 11696, 11702, 11704, 11710, 11712, 11718, 11720, 11726, 11728, 11734, 11736, 11742, 11823, 11823, 12293, 12295, 12321, 12329, 12337, 12341, 12344, 12348, 12353, 12438, 12445, 12447, 12449, 12538, 12540, 12543, 12549, 12589, 12593, 12686, 12704, 12730, 12784, 12799, 13312, 19893, 19968, 40908, 40960, 42124, 42192, 42237, 42240, 42508, 42512, 42527, 42538, 42539, 42560, 42606, 42623, 42647, 42656, 42735, 42775, 42783, 42786, 42888, 42891, 42894, 42896, 42899, 42912, 42922, 43000, 43009, 43011, 43013, 43015, 43018, 43020, 43042, 43072, 43123, 43138, 43187, 43250, 43255, 43259, 43259, 43274, 43301, 43312, 43334, 43360, 43388, 43396, 43442, 43471, 43471, 43520, 43560, 43584, 43586, 43588, 43595, 43616, 43638, 43642, 43642, 43648, 43695, 43697, 43697, 43701, 43702, 43705, 43709, 43712, 43712, 43714, 43714, 43739, 43741, 43744, 43754, 43762, 43764, 43777, 43782, 43785, 43790, 43793, 43798, 43808, 43814, 43816, 43822, 43968, 44002, 44032, 55203, 55216, 55238, 55243, 55291, 63744, 64109, 64112, 64217, 64256, 64262, 64275, 64279, 64285, 64285, 64287, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65136, 65140, 65142, 65276, 65313, 65338, 65345, 65370, 65382, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
    var unicodeES5IdentifierPart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 705, 710, 721, 736, 740, 748, 748, 750, 750, 768, 884, 886, 887, 890, 893, 902, 902, 904, 906, 908, 908, 910, 929, 931, 1013, 1015, 1153, 1155, 1159, 1162, 1319, 1329, 1366, 1369, 1369, 1377, 1415, 1425, 1469, 1471, 1471, 1473, 1474, 1476, 1477, 1479, 1479, 1488, 1514, 1520, 1522, 1552, 1562, 1568, 1641, 1646, 1747, 1749, 1756, 1759, 1768, 1770, 1788, 1791, 1791, 1808, 1866, 1869, 1969, 1984, 2037, 2042, 2042, 2048, 2093, 2112, 2139, 2208, 2208, 2210, 2220, 2276, 2302, 2304, 2403, 2406, 2415, 2417, 2423, 2425, 2431, 2433, 2435, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2492, 2500, 2503, 2504, 2507, 2510, 2519, 2519, 2524, 2525, 2527, 2531, 2534, 2545, 2561, 2563, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2620, 2620, 2622, 2626, 2631, 2632, 2635, 2637, 2641, 2641, 2649, 2652, 2654, 2654, 2662, 2677, 2689, 2691, 2693, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2748, 2757, 2759, 2761, 2763, 2765, 2768, 2768, 2784, 2787, 2790, 2799, 2817, 2819, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2869, 2873, 2876, 2884, 2887, 2888, 2891, 2893, 2902, 2903, 2908, 2909, 2911, 2915, 2918, 2927, 2929, 2929, 2946, 2947, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 3001, 3006, 3010, 3014, 3016, 3018, 3021, 3024, 3024, 3031, 3031, 3046, 3055, 3073, 3075, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3133, 3140, 3142, 3144, 3146, 3149, 3157, 3158, 3160, 3161, 3168, 3171, 3174, 3183, 3202, 3203, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3260, 3268, 3270, 3272, 3274, 3277, 3285, 3286, 3294, 3294, 3296, 3299, 3302, 3311, 3313, 3314, 3330, 3331, 3333, 3340, 3342, 3344, 3346, 3386, 3389, 3396, 3398, 3400, 3402, 3406, 3415, 3415, 3424, 3427, 3430, 3439, 3450, 3455, 3458, 3459, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3530, 3530, 3535, 3540, 3542, 3542, 3544, 3551, 3570, 3571, 3585, 3642, 3648, 3662, 3664, 3673, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3769, 3771, 3773, 3776, 3780, 3782, 3782, 3784, 3789, 3792, 3801, 3804, 3807, 3840, 3840, 3864, 3865, 3872, 3881, 3893, 3893, 3895, 3895, 3897, 3897, 3902, 3911, 3913, 3948, 3953, 3972, 3974, 3991, 3993, 4028, 4038, 4038, 4096, 4169, 4176, 4253, 4256, 4293, 4295, 4295, 4301, 4301, 4304, 4346, 4348, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4744, 4746, 4749, 4752, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4822, 4824, 4880, 4882, 4885, 4888, 4954, 4957, 4959, 4992, 5007, 5024, 5108, 5121, 5740, 5743, 5759, 5761, 5786, 5792, 5866, 5870, 5872, 5888, 5900, 5902, 5908, 5920, 5940, 5952, 5971, 5984, 5996, 5998, 6000, 6002, 6003, 6016, 6099, 6103, 6103, 6108, 6109, 6112, 6121, 6155, 6157, 6160, 6169, 6176, 6263, 6272, 6314, 6320, 6389, 6400, 6428, 6432, 6443, 6448, 6459, 6470, 6509, 6512, 6516, 6528, 6571, 6576, 6601, 6608, 6617, 6656, 6683, 6688, 6750, 6752, 6780, 6783, 6793, 6800, 6809, 6823, 6823, 6912, 6987, 6992, 7001, 7019, 7027, 7040, 7155, 7168, 7223, 7232, 7241, 7245, 7293, 7376, 7378, 7380, 7414, 7424, 7654, 7676, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8204, 8205, 8255, 8256, 8276, 8276, 8305, 8305, 8319, 8319, 8336, 8348, 8400, 8412, 8417, 8417, 8421, 8432, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8505, 8508, 8511, 8517, 8521, 8526, 8526, 8544, 8584, 11264, 11310, 11312, 11358, 11360, 11492, 11499, 11507, 11520, 11557, 11559, 11559, 11565, 11565, 11568, 11623, 11631, 11631, 11647, 11670, 11680, 11686, 11688, 11694, 11696, 11702, 11704, 11710, 11712, 11718, 11720, 11726, 11728, 11734, 11736, 11742, 11744, 11775, 11823, 11823, 12293, 12295, 12321, 12335, 12337, 12341, 12344, 12348, 12353, 12438, 12441, 12442, 12445, 12447, 12449, 12538, 12540, 12543, 12549, 12589, 12593, 12686, 12704, 12730, 12784, 12799, 13312, 19893, 19968, 40908, 40960, 42124, 42192, 42237, 42240, 42508, 42512, 42539, 42560, 42607, 42612, 42621, 42623, 42647, 42655, 42737, 42775, 42783, 42786, 42888, 42891, 42894, 42896, 42899, 42912, 42922, 43000, 43047, 43072, 43123, 43136, 43204, 43216, 43225, 43232, 43255, 43259, 43259, 43264, 43309, 43312, 43347, 43360, 43388, 43392, 43456, 43471, 43481, 43520, 43574, 43584, 43597, 43600, 43609, 43616, 43638, 43642, 43643, 43648, 43714, 43739, 43741, 43744, 43759, 43762, 43766, 43777, 43782, 43785, 43790, 43793, 43798, 43808, 43814, 43816, 43822, 43968, 44010, 44012, 44013, 44016, 44025, 44032, 55203, 55216, 55238, 55243, 55291, 63744, 64109, 64112, 64217, 64256, 64262, 64275, 64279, 64285, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65024, 65039, 65056, 65062, 65075, 65076, 65101, 65103, 65136, 65140, 65142, 65276, 65296, 65305, 65313, 65338, 65343, 65343, 65345, 65370, 65382, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
    function lookupInUnicodeMap(code, map) {
        // Bail out quickly if it couldn't possibly be in the map.
        if (code < map[0]) {
            return false;
        }
        // Perform binary search in one of the Unicode range maps
        var lo = 0;
        var hi = map.length;
        var mid;
        while (lo + 1 < hi) {
            mid = lo + (hi - lo) / 2;
            // mid has to be even to catch a range's beginning
            mid -= mid % 2;
            if (map[mid] <= code && code <= map[mid + 1]) {
                return true;
            }
            if (code < map[mid]) {
                hi = mid;
            }
            else {
                lo = mid + 2;
            }
        }
        return false;
    }
    /* @internal */ function isUnicodeIdentifierStart(code, languageVersion) {
        return languageVersion >= 1 /* ES5 */ ?
            lookupInUnicodeMap(code, unicodeES5IdentifierStart) :
            lookupInUnicodeMap(code, unicodeES3IdentifierStart);
    }
    ts.isUnicodeIdentifierStart = isUnicodeIdentifierStart;
    function isUnicodeIdentifierPart(code, languageVersion) {
        return languageVersion >= 1 /* ES5 */ ?
            lookupInUnicodeMap(code, unicodeES5IdentifierPart) :
            lookupInUnicodeMap(code, unicodeES3IdentifierPart);
    }
    function makeReverseMap(source) {
        var result = [];
        source.forEach(function (value, name) {
            result[value] = name;
        });
        return result;
    }
    var tokenStrings = makeReverseMap(textToToken);
    function tokenToString(t) {
        return tokenStrings[t];
    }
    ts.tokenToString = tokenToString;
    /* @internal */
    function stringToToken(s) {
        return textToToken.get(s);
    }
    ts.stringToToken = stringToToken;
    /* @internal */
    function computeLineStarts(text) {
        var result = new Array();
        var pos = 0;
        var lineStart = 0;
        while (pos < text.length) {
            var ch = text.charCodeAt(pos);
            pos++;
            switch (ch) {
                case 13 /* carriageReturn */:
                    if (text.charCodeAt(pos) === 10 /* lineFeed */) {
                        pos++;
                    }
                // falls through
                case 10 /* lineFeed */:
                    result.push(lineStart);
                    lineStart = pos;
                    break;
                default:
                    if (ch > 127 /* maxAsciiCharacter */ && isLineBreak(ch)) {
                        result.push(lineStart);
                        lineStart = pos;
                    }
                    break;
            }
        }
        result.push(lineStart);
        return result;
    }
    ts.computeLineStarts = computeLineStarts;
    function getPositionOfLineAndCharacter(sourceFile, line, character) {
        return computePositionOfLineAndCharacter(getLineStarts(sourceFile), line, character, sourceFile.text);
    }
    ts.getPositionOfLineAndCharacter = getPositionOfLineAndCharacter;
    /* @internal */
    function computePositionOfLineAndCharacter(lineStarts, line, character, debugText) {
        if (line < 0 || line >= lineStarts.length) {
            ts.Debug.fail("Bad line number. Line: " + line + ", lineStarts.length: " + lineStarts.length + " , line map is correct? " + (debugText !== undefined ? ts.arraysEqual(lineStarts, computeLineStarts(debugText)) : "unknown"));
        }
        var res = lineStarts[line] + character;
        if (line < lineStarts.length - 1) {
            ts.Debug.assert(res < lineStarts[line + 1]);
        }
        else if (debugText !== undefined) {
            ts.Debug.assert(res <= debugText.length); // Allow single character overflow for trailing newline
        }
        return res;
    }
    ts.computePositionOfLineAndCharacter = computePositionOfLineAndCharacter;
    /* @internal */
    function getLineStarts(sourceFile) {
        return sourceFile.lineMap || (sourceFile.lineMap = computeLineStarts(sourceFile.text));
    }
    ts.getLineStarts = getLineStarts;
    /* @internal */
    /**
     * We assume the first line starts at position 0 and 'position' is non-negative.
     */
    function computeLineAndCharacterOfPosition(lineStarts, position) {
        var lineNumber = ts.binarySearch(lineStarts, position, ts.identity, ts.compareValues);
        if (lineNumber < 0) {
            // If the actual position was not found,
            // the binary search returns the 2's-complement of the next line start
            // e.g. if the line starts at [5, 10, 23, 80] and the position requested was 20
            // then the search will return -2.
            //
            // We want the index of the previous line start, so we subtract 1.
            // Review 2's-complement if this is confusing.
            lineNumber = ~lineNumber - 1;
            ts.Debug.assert(lineNumber !== -1, "position cannot precede the beginning of the file");
        }
        return {
            line: lineNumber,
            character: position - lineStarts[lineNumber]
        };
    }
    ts.computeLineAndCharacterOfPosition = computeLineAndCharacterOfPosition;
    function getLineAndCharacterOfPosition(sourceFile, position) {
        return computeLineAndCharacterOfPosition(getLineStarts(sourceFile), position);
    }
    ts.getLineAndCharacterOfPosition = getLineAndCharacterOfPosition;
    function isWhiteSpaceLike(ch) {
        return isWhiteSpaceSingleLine(ch) || isLineBreak(ch);
    }
    ts.isWhiteSpaceLike = isWhiteSpaceLike;
    /** Does not include line breaks. For that, see isWhiteSpaceLike. */
    function isWhiteSpaceSingleLine(ch) {
        // Note: nextLine is in the Zs space, and should be considered to be a whitespace.
        // It is explicitly not a line-break as it isn't in the exact set specified by EcmaScript.
        return ch === 32 /* space */ ||
            ch === 9 /* tab */ ||
            ch === 11 /* verticalTab */ ||
            ch === 12 /* formFeed */ ||
            ch === 160 /* nonBreakingSpace */ ||
            ch === 133 /* nextLine */ ||
            ch === 5760 /* ogham */ ||
            ch >= 8192 /* enQuad */ && ch <= 8203 /* zeroWidthSpace */ ||
            ch === 8239 /* narrowNoBreakSpace */ ||
            ch === 8287 /* mathematicalSpace */ ||
            ch === 12288 /* ideographicSpace */ ||
            ch === 65279 /* byteOrderMark */;
    }
    ts.isWhiteSpaceSingleLine = isWhiteSpaceSingleLine;
    function isLineBreak(ch) {
        // ES5 7.3:
        // The ECMAScript line terminator characters are listed in Table 3.
        //     Table 3: Line Terminator Characters
        //     Code Unit Value     Name                    Formal Name
        //     \u000A              Line Feed               <LF>
        //     \u000D              Carriage Return         <CR>
        //     \u2028              Line separator          <LS>
        //     \u2029              Paragraph separator     <PS>
        // Only the characters in Table 3 are treated as line terminators. Other new line or line
        // breaking characters are treated as white space but not as line terminators.
        return ch === 10 /* lineFeed */ ||
            ch === 13 /* carriageReturn */ ||
            ch === 8232 /* lineSeparator */ ||
            ch === 8233 /* paragraphSeparator */;
    }
    ts.isLineBreak = isLineBreak;
    function isDigit(ch) {
        return ch >= 48 /* _0 */ && ch <= 57 /* _9 */;
    }
    /* @internal */
    function isOctalDigit(ch) {
        return ch >= 48 /* _0 */ && ch <= 55 /* _7 */;
    }
    ts.isOctalDigit = isOctalDigit;
    function couldStartTrivia(text, pos) {
        // Keep in sync with skipTrivia
        var ch = text.charCodeAt(pos);
        switch (ch) {
            case 13 /* carriageReturn */:
            case 10 /* lineFeed */:
            case 9 /* tab */:
            case 11 /* verticalTab */:
            case 12 /* formFeed */:
            case 32 /* space */:
            case 47 /* slash */:
            // starts of normal trivia
            case 60 /* lessThan */:
            case 124 /* bar */:
            case 61 /* equals */:
            case 62 /* greaterThan */:
                // Starts of conflict marker trivia
                return true;
            case 35 /* hash */:
                // Only if its the beginning can we have #! trivia
                return pos === 0;
            default:
                return ch > 127 /* maxAsciiCharacter */;
        }
    }
    ts.couldStartTrivia = couldStartTrivia;
    /* @internal */
    function skipTrivia(text, pos, stopAfterLineBreak, stopAtComments) {
        if (stopAtComments === void 0) { stopAtComments = false; }
        if (ts.positionIsSynthesized(pos)) {
            return pos;
        }
        // Keep in sync with couldStartTrivia
        while (true) {
            var ch = text.charCodeAt(pos);
            switch (ch) {
                case 13 /* carriageReturn */:
                    if (text.charCodeAt(pos + 1) === 10 /* lineFeed */) {
                        pos++;
                    }
                // falls through
                case 10 /* lineFeed */:
                    pos++;
                    if (stopAfterLineBreak) {
                        return pos;
                    }
                    continue;
                case 9 /* tab */:
                case 11 /* verticalTab */:
                case 12 /* formFeed */:
                case 32 /* space */:
                    pos++;
                    continue;
                case 47 /* slash */:
                    if (stopAtComments) {
                        break;
                    }
                    if (text.charCodeAt(pos + 1) === 47 /* slash */) {
                        pos += 2;
                        while (pos < text.length) {
                            if (isLineBreak(text.charCodeAt(pos))) {
                                break;
                            }
                            pos++;
                        }
                        continue;
                    }
                    if (text.charCodeAt(pos + 1) === 42 /* asterisk */) {
                        pos += 2;
                        while (pos < text.length) {
                            if (text.charCodeAt(pos) === 42 /* asterisk */ && text.charCodeAt(pos + 1) === 47 /* slash */) {
                                pos += 2;
                                break;
                            }
                            pos++;
                        }
                        continue;
                    }
                    break;
                case 60 /* lessThan */:
                case 124 /* bar */:
                case 61 /* equals */:
                case 62 /* greaterThan */:
                    if (isConflictMarkerTrivia(text, pos)) {
                        pos = scanConflictMarkerTrivia(text, pos);
                        continue;
                    }
                    break;
                case 35 /* hash */:
                    if (pos === 0 && isShebangTrivia(text, pos)) {
                        pos = scanShebangTrivia(text, pos);
                        continue;
                    }
                    break;
                default:
                    if (ch > 127 /* maxAsciiCharacter */ && (isWhiteSpaceLike(ch))) {
                        pos++;
                        continue;
                    }
                    break;
            }
            return pos;
        }
    }
    ts.skipTrivia = skipTrivia;
    // All conflict markers consist of the same character repeated seven times.  If it is
    // a <<<<<<< or >>>>>>> marker then it is also followed by a space.
    var mergeConflictMarkerLength = "<<<<<<<".length;
    function isConflictMarkerTrivia(text, pos) {
        ts.Debug.assert(pos >= 0);
        // Conflict markers must be at the start of a line.
        if (pos === 0 || isLineBreak(text.charCodeAt(pos - 1))) {
            var ch = text.charCodeAt(pos);
            if ((pos + mergeConflictMarkerLength) < text.length) {
                for (var i = 0; i < mergeConflictMarkerLength; i++) {
                    if (text.charCodeAt(pos + i) !== ch) {
                        return false;
                    }
                }
                return ch === 61 /* equals */ ||
                    text.charCodeAt(pos + mergeConflictMarkerLength) === 32 /* space */;
            }
        }
        return false;
    }
    function scanConflictMarkerTrivia(text, pos, error) {
        if (error) {
            error(ts.Diagnostics.Merge_conflict_marker_encountered, pos, mergeConflictMarkerLength);
        }
        var ch = text.charCodeAt(pos);
        var len = text.length;
        if (ch === 60 /* lessThan */ || ch === 62 /* greaterThan */) {
            while (pos < len && !isLineBreak(text.charCodeAt(pos))) {
                pos++;
            }
        }
        else {
            ts.Debug.assert(ch === 124 /* bar */ || ch === 61 /* equals */);
            // Consume everything from the start of a ||||||| or ======= marker to the start
            // of the next ======= or >>>>>>> marker.
            while (pos < len) {
                var currentChar = text.charCodeAt(pos);
                if ((currentChar === 61 /* equals */ || currentChar === 62 /* greaterThan */) && currentChar !== ch && isConflictMarkerTrivia(text, pos)) {
                    break;
                }
                pos++;
            }
        }
        return pos;
    }
    var shebangTriviaRegex = /^#!.*/;
    function isShebangTrivia(text, pos) {
        // Shebangs check must only be done at the start of the file
        ts.Debug.assert(pos === 0);
        return shebangTriviaRegex.test(text);
    }
    function scanShebangTrivia(text, pos) {
        var shebang = shebangTriviaRegex.exec(text)[0];
        pos = pos + shebang.length;
        return pos;
    }
    /**
     * Invokes a callback for each comment range following the provided position.
     *
     * Single-line comment ranges include the leading double-slash characters but not the ending
     * line break. Multi-line comment ranges include the leading slash-asterisk and trailing
     * asterisk-slash characters.
     *
     * @param reduce If true, accumulates the result of calling the callback in a fashion similar
     *      to reduceLeft. If false, iteration stops when the callback returns a truthy value.
     * @param text The source text to scan.
     * @param pos The position at which to start scanning.
     * @param trailing If false, whitespace is skipped until the first line break and comments
     *      between that location and the next token are returned. If true, comments occurring
     *      between the given position and the next line break are returned.
     * @param cb The callback to execute as each comment range is encountered.
     * @param state A state value to pass to each iteration of the callback.
     * @param initial An initial value to pass when accumulating results (when "reduce" is true).
     * @returns If "reduce" is true, the accumulated value. If "reduce" is false, the first truthy
     *      return value of the callback.
     */
    function iterateCommentRanges(reduce, text, pos, trailing, cb, state, initial) {
        var pendingPos;
        var pendingEnd;
        var pendingKind;
        var pendingHasTrailingNewLine;
        var hasPendingCommentRange = false;
        var collecting = trailing || pos === 0;
        var accumulator = initial;
        scan: while (pos >= 0 && pos < text.length) {
            var ch = text.charCodeAt(pos);
            switch (ch) {
                case 13 /* carriageReturn */:
                    if (text.charCodeAt(pos + 1) === 10 /* lineFeed */) {
                        pos++;
                    }
                // falls through
                case 10 /* lineFeed */:
                    pos++;
                    if (trailing) {
                        break scan;
                    }
                    collecting = true;
                    if (hasPendingCommentRange) {
                        pendingHasTrailingNewLine = true;
                    }
                    continue;
                case 9 /* tab */:
                case 11 /* verticalTab */:
                case 12 /* formFeed */:
                case 32 /* space */:
                    pos++;
                    continue;
                case 47 /* slash */:
                    var nextChar = text.charCodeAt(pos + 1);
                    var hasTrailingNewLine = false;
                    if (nextChar === 47 /* slash */ || nextChar === 42 /* asterisk */) {
                        var kind = nextChar === 47 /* slash */ ? 2 /* SingleLineCommentTrivia */ : 3 /* MultiLineCommentTrivia */;
                        var startPos = pos;
                        pos += 2;
                        if (nextChar === 47 /* slash */) {
                            while (pos < text.length) {
                                if (isLineBreak(text.charCodeAt(pos))) {
                                    hasTrailingNewLine = true;
                                    break;
                                }
                                pos++;
                            }
                        }
                        else {
                            while (pos < text.length) {
                                if (text.charCodeAt(pos) === 42 /* asterisk */ && text.charCodeAt(pos + 1) === 47 /* slash */) {
                                    pos += 2;
                                    break;
                                }
                                pos++;
                            }
                        }
                        if (collecting) {
                            if (hasPendingCommentRange) {
                                accumulator = cb(pendingPos, pendingEnd, pendingKind, pendingHasTrailingNewLine, state, accumulator);
                                if (!reduce && accumulator) {
                                    // If we are not reducing and we have a truthy result, return it.
                                    return accumulator;
                                }
                            }
                            pendingPos = startPos;
                            pendingEnd = pos;
                            pendingKind = kind;
                            pendingHasTrailingNewLine = hasTrailingNewLine;
                            hasPendingCommentRange = true;
                        }
                        continue;
                    }
                    break scan;
                default:
                    if (ch > 127 /* maxAsciiCharacter */ && (isWhiteSpaceLike(ch))) {
                        if (hasPendingCommentRange && isLineBreak(ch)) {
                            pendingHasTrailingNewLine = true;
                        }
                        pos++;
                        continue;
                    }
                    break scan;
            }
        }
        if (hasPendingCommentRange) {
            accumulator = cb(pendingPos, pendingEnd, pendingKind, pendingHasTrailingNewLine, state, accumulator);
        }
        return accumulator;
    }
    function forEachLeadingCommentRange(text, pos, cb, state) {
        return iterateCommentRanges(/*reduce*/ false, text, pos, /*trailing*/ false, cb, state);
    }
    ts.forEachLeadingCommentRange = forEachLeadingCommentRange;
    function forEachTrailingCommentRange(text, pos, cb, state) {
        return iterateCommentRanges(/*reduce*/ false, text, pos, /*trailing*/ true, cb, state);
    }
    ts.forEachTrailingCommentRange = forEachTrailingCommentRange;
    function reduceEachLeadingCommentRange(text, pos, cb, state, initial) {
        return iterateCommentRanges(/*reduce*/ true, text, pos, /*trailing*/ false, cb, state, initial);
    }
    ts.reduceEachLeadingCommentRange = reduceEachLeadingCommentRange;
    function reduceEachTrailingCommentRange(text, pos, cb, state, initial) {
        return iterateCommentRanges(/*reduce*/ true, text, pos, /*trailing*/ true, cb, state, initial);
    }
    ts.reduceEachTrailingCommentRange = reduceEachTrailingCommentRange;
    function appendCommentRange(pos, end, kind, hasTrailingNewLine, _state, comments) {
        if (!comments) {
            comments = [];
        }
        comments.push({ kind: kind, pos: pos, end: end, hasTrailingNewLine: hasTrailingNewLine });
        return comments;
    }
    function getLeadingCommentRanges(text, pos) {
        return reduceEachLeadingCommentRange(text, pos, appendCommentRange, /*state*/ undefined, /*initial*/ undefined);
    }
    ts.getLeadingCommentRanges = getLeadingCommentRanges;
    function getTrailingCommentRanges(text, pos) {
        return reduceEachTrailingCommentRange(text, pos, appendCommentRange, /*state*/ undefined, /*initial*/ undefined);
    }
    ts.getTrailingCommentRanges = getTrailingCommentRanges;
    /** Optionally, get the shebang */
    function getShebang(text) {
        var match = shebangTriviaRegex.exec(text);
        if (match) {
            return match[0];
        }
    }
    ts.getShebang = getShebang;
    function isIdentifierStart(ch, languageVersion) {
        return ch >= 65 /* A */ && ch <= 90 /* Z */ || ch >= 97 /* a */ && ch <= 122 /* z */ ||
            ch === 36 /* $ */ || ch === 95 /* _ */ ||
            ch > 127 /* maxAsciiCharacter */ && isUnicodeIdentifierStart(ch, languageVersion);
    }
    ts.isIdentifierStart = isIdentifierStart;
    function isIdentifierPart(ch, languageVersion) {
        return ch >= 65 /* A */ && ch <= 90 /* Z */ || ch >= 97 /* a */ && ch <= 122 /* z */ ||
            ch >= 48 /* _0 */ && ch <= 57 /* _9 */ || ch === 36 /* $ */ || ch === 95 /* _ */ ||
            ch > 127 /* maxAsciiCharacter */ && isUnicodeIdentifierPart(ch, languageVersion);
    }
    ts.isIdentifierPart = isIdentifierPart;
    /* @internal */
    function isIdentifierText(name, languageVersion) {
        if (!isIdentifierStart(name.charCodeAt(0), languageVersion)) {
            return false;
        }
        for (var i = 1; i < name.length; i++) {
            if (!isIdentifierPart(name.charCodeAt(i), languageVersion)) {
                return false;
            }
        }
        return true;
    }
    ts.isIdentifierText = isIdentifierText;
    // Creates a scanner over a (possibly unspecified) range of a piece of text.
    function createScanner(languageVersion, skipTrivia, languageVariant, textInitial, onError, start, length) {
        if (languageVariant === void 0) { languageVariant = 0 /* Standard */; }
        var text = textInitial;
        // Current position (end position of text of current token)
        var pos;
        // end of text
        var end;
        // Start position of whitespace before current token
        var startPos;
        // Start position of text of current token
        var tokenPos;
        var token;
        var tokenValue;
        var tokenFlags;
        setText(text, start, length);
        return {
            getStartPos: function () { return startPos; },
            getTextPos: function () { return pos; },
            getToken: function () { return token; },
            getTokenPos: function () { return tokenPos; },
            getTokenText: function () { return text.substring(tokenPos, pos); },
            getTokenValue: function () { return tokenValue; },
            hasExtendedUnicodeEscape: function () { return (tokenFlags & 8 /* ExtendedUnicodeEscape */) !== 0; },
            hasPrecedingLineBreak: function () { return (tokenFlags & 1 /* PrecedingLineBreak */) !== 0; },
            isIdentifier: function () { return token === 71 /* Identifier */ || token > 107 /* LastReservedWord */; },
            isReservedWord: function () { return token >= 72 /* FirstReservedWord */ && token <= 107 /* LastReservedWord */; },
            isUnterminated: function () { return (tokenFlags & 4 /* Unterminated */) !== 0; },
            getTokenFlags: function () { return tokenFlags; },
            reScanGreaterToken: reScanGreaterToken,
            reScanSlashToken: reScanSlashToken,
            reScanTemplateToken: reScanTemplateToken,
            scanJsxIdentifier: scanJsxIdentifier,
            scanJsxAttributeValue: scanJsxAttributeValue,
            reScanJsxToken: reScanJsxToken,
            scanJsxToken: scanJsxToken,
            scanJSDocToken: scanJSDocToken,
            scan: scan,
            getText: getText,
            setText: setText,
            setScriptTarget: setScriptTarget,
            setLanguageVariant: setLanguageVariant,
            setOnError: setOnError,
            setTextPos: setTextPos,
            tryScan: tryScan,
            lookAhead: lookAhead,
            scanRange: scanRange,
        };
        function error(message, errPos, length) {
            if (errPos === void 0) { errPos = pos; }
            if (onError) {
                var oldPos = pos;
                pos = errPos;
                onError(message, length || 0);
                pos = oldPos;
            }
        }
        function scanNumberFragment() {
            var start = pos;
            var allowSeparator = false;
            var isPreviousTokenSeparator = false;
            var result = "";
            while (true) {
                var ch = text.charCodeAt(pos);
                if (ch === 95 /* _ */) {
                    tokenFlags |= 512 /* ContainsSeparator */;
                    if (allowSeparator) {
                        allowSeparator = false;
                        isPreviousTokenSeparator = true;
                        result += text.substring(start, pos);
                    }
                    else if (isPreviousTokenSeparator) {
                        error(ts.Diagnostics.Multiple_consecutive_numeric_separators_are_not_permitted, pos, 1);
                    }
                    else {
                        error(ts.Diagnostics.Numeric_separators_are_not_allowed_here, pos, 1);
                    }
                    pos++;
                    start = pos;
                    continue;
                }
                if (isDigit(ch)) {
                    allowSeparator = true;
                    isPreviousTokenSeparator = false;
                    pos++;
                    continue;
                }
                break;
            }
            if (text.charCodeAt(pos - 1) === 95 /* _ */) {
                error(ts.Diagnostics.Numeric_separators_are_not_allowed_here, pos - 1, 1);
            }
            return result + text.substring(start, pos);
        }
        function scanNumber() {
            var start = pos;
            var mainFragment = scanNumberFragment();
            var decimalFragment;
            var scientificFragment;
            if (text.charCodeAt(pos) === 46 /* dot */) {
                pos++;
                decimalFragment = scanNumberFragment();
            }
            var end = pos;
            if (text.charCodeAt(pos) === 69 /* E */ || text.charCodeAt(pos) === 101 /* e */) {
                pos++;
                tokenFlags |= 16 /* Scientific */;
                if (text.charCodeAt(pos) === 43 /* plus */ || text.charCodeAt(pos) === 45 /* minus */)
                    pos++;
                var preNumericPart = pos;
                var finalFragment = scanNumberFragment();
                if (!finalFragment) {
                    error(ts.Diagnostics.Digit_expected);
                }
                else {
                    scientificFragment = text.substring(end, preNumericPart) + finalFragment;
                    end = pos;
                }
            }
            if (tokenFlags & 512 /* ContainsSeparator */) {
                var result = mainFragment;
                if (decimalFragment) {
                    result += "." + decimalFragment;
                }
                if (scientificFragment) {
                    result += scientificFragment;
                }
                return "" + +result;
            }
            else {
                return "" + +(text.substring(start, end)); // No need to use all the fragments; no _ removal needed
            }
        }
        function scanOctalDigits() {
            var start = pos;
            while (isOctalDigit(text.charCodeAt(pos))) {
                pos++;
            }
            return +(text.substring(start, pos));
        }
        /**
         * Scans the given number of hexadecimal digits in the text,
         * returning -1 if the given number is unavailable.
         */
        function scanExactNumberOfHexDigits(count, canHaveSeparators) {
            return scanHexDigits(/*minCount*/ count, /*scanAsManyAsPossible*/ false, canHaveSeparators);
        }
        /**
         * Scans as many hexadecimal digits as are available in the text,
         * returning -1 if the given number of digits was unavailable.
         */
        function scanMinimumNumberOfHexDigits(count, canHaveSeparators) {
            return scanHexDigits(/*minCount*/ count, /*scanAsManyAsPossible*/ true, canHaveSeparators);
        }
        function scanHexDigits(minCount, scanAsManyAsPossible, canHaveSeparators) {
            var digits = 0;
            var value = 0;
            var allowSeparator = false;
            var isPreviousTokenSeparator = false;
            while (digits < minCount || scanAsManyAsPossible) {
                var ch = text.charCodeAt(pos);
                if (canHaveSeparators && ch === 95 /* _ */) {
                    tokenFlags |= 512 /* ContainsSeparator */;
                    if (allowSeparator) {
                        allowSeparator = false;
                        isPreviousTokenSeparator = true;
                    }
                    else if (isPreviousTokenSeparator) {
                        error(ts.Diagnostics.Multiple_consecutive_numeric_separators_are_not_permitted, pos, 1);
                    }
                    else {
                        error(ts.Diagnostics.Numeric_separators_are_not_allowed_here, pos, 1);
                    }
                    pos++;
                    continue;
                }
                allowSeparator = canHaveSeparators;
                if (ch >= 48 /* _0 */ && ch <= 57 /* _9 */) {
                    value = value * 16 + ch - 48 /* _0 */;
                }
                else if (ch >= 65 /* A */ && ch <= 70 /* F */) {
                    value = value * 16 + ch - 65 /* A */ + 10;
                }
                else if (ch >= 97 /* a */ && ch <= 102 /* f */) {
                    value = value * 16 + ch - 97 /* a */ + 10;
                }
                else {
                    break;
                }
                pos++;
                digits++;
                isPreviousTokenSeparator = false;
            }
            if (digits < minCount) {
                value = -1;
            }
            if (text.charCodeAt(pos - 1) === 95 /* _ */) {
                error(ts.Diagnostics.Numeric_separators_are_not_allowed_here, pos - 1, 1);
            }
            return value;
        }
        function scanString(jsxAttributeString) {
            if (jsxAttributeString === void 0) { jsxAttributeString = false; }
            var quote = text.charCodeAt(pos);
            pos++;
            var result = "";
            var start = pos;
            while (true) {
                if (pos >= end) {
                    result += text.substring(start, pos);
                    tokenFlags |= 4 /* Unterminated */;
                    error(ts.Diagnostics.Unterminated_string_literal);
                    break;
                }
                var ch = text.charCodeAt(pos);
                if (ch === quote) {
                    result += text.substring(start, pos);
                    pos++;
                    break;
                }
                if (ch === 92 /* backslash */ && !jsxAttributeString) {
                    result += text.substring(start, pos);
                    result += scanEscapeSequence();
                    start = pos;
                    continue;
                }
                if (isLineBreak(ch) && !jsxAttributeString) {
                    result += text.substring(start, pos);
                    tokenFlags |= 4 /* Unterminated */;
                    error(ts.Diagnostics.Unterminated_string_literal);
                    break;
                }
                pos++;
            }
            return result;
        }
        /**
         * Sets the current 'tokenValue' and returns a NoSubstitutionTemplateLiteral or
         * a literal component of a TemplateExpression.
         */
        function scanTemplateAndSetTokenValue() {
            var startedWithBacktick = text.charCodeAt(pos) === 96 /* backtick */;
            pos++;
            var start = pos;
            var contents = "";
            var resultingToken;
            while (true) {
                if (pos >= end) {
                    contents += text.substring(start, pos);
                    tokenFlags |= 4 /* Unterminated */;
                    error(ts.Diagnostics.Unterminated_template_literal);
                    resultingToken = startedWithBacktick ? 13 /* NoSubstitutionTemplateLiteral */ : 16 /* TemplateTail */;
                    break;
                }
                var currChar = text.charCodeAt(pos);
                // '`'
                if (currChar === 96 /* backtick */) {
                    contents += text.substring(start, pos);
                    pos++;
                    resultingToken = startedWithBacktick ? 13 /* NoSubstitutionTemplateLiteral */ : 16 /* TemplateTail */;
                    break;
                }
                // '${'
                if (currChar === 36 /* $ */ && pos + 1 < end && text.charCodeAt(pos + 1) === 123 /* openBrace */) {
                    contents += text.substring(start, pos);
                    pos += 2;
                    resultingToken = startedWithBacktick ? 14 /* TemplateHead */ : 15 /* TemplateMiddle */;
                    break;
                }
                // Escape character
                if (currChar === 92 /* backslash */) {
                    contents += text.substring(start, pos);
                    contents += scanEscapeSequence();
                    start = pos;
                    continue;
                }
                // Speculated ECMAScript 6 Spec 11.8.6.1:
                // <CR><LF> and <CR> LineTerminatorSequences are normalized to <LF> for Template Values
                if (currChar === 13 /* carriageReturn */) {
                    contents += text.substring(start, pos);
                    pos++;
                    if (pos < end && text.charCodeAt(pos) === 10 /* lineFeed */) {
                        pos++;
                    }
                    contents += "\n";
                    start = pos;
                    continue;
                }
                pos++;
            }
            ts.Debug.assert(resultingToken !== undefined);
            tokenValue = contents;
            return resultingToken;
        }
        function scanEscapeSequence() {
            pos++;
            if (pos >= end) {
                error(ts.Diagnostics.Unexpected_end_of_text);
                return "";
            }
            var ch = text.charCodeAt(pos);
            pos++;
            switch (ch) {
                case 48 /* _0 */:
                    return "\0";
                case 98 /* b */:
                    return "\b";
                case 116 /* t */:
                    return "\t";
                case 110 /* n */:
                    return "\n";
                case 118 /* v */:
                    return "\v";
                case 102 /* f */:
                    return "\f";
                case 114 /* r */:
                    return "\r";
                case 39 /* singleQuote */:
                    return "\'";
                case 34 /* doubleQuote */:
                    return "\"";
                case 117 /* u */:
                    // '\u{DDDDDDDD}'
                    if (pos < end && text.charCodeAt(pos) === 123 /* openBrace */) {
                        tokenFlags |= 8 /* ExtendedUnicodeEscape */;
                        pos++;
                        return scanExtendedUnicodeEscape();
                    }
                    // '\uDDDD'
                    return scanHexadecimalEscape(/*numDigits*/ 4);
                case 120 /* x */:
                    // '\xDD'
                    return scanHexadecimalEscape(/*numDigits*/ 2);
                // when encountering a LineContinuation (i.e. a backslash and a line terminator sequence),
                // the line terminator is interpreted to be "the empty code unit sequence".
                case 13 /* carriageReturn */:
                    if (pos < end && text.charCodeAt(pos) === 10 /* lineFeed */) {
                        pos++;
                    }
                // falls through
                case 10 /* lineFeed */:
                case 8232 /* lineSeparator */:
                case 8233 /* paragraphSeparator */:
                    return "";
                default:
                    return String.fromCharCode(ch);
            }
        }
        function scanHexadecimalEscape(numDigits) {
            var escapedValue = scanExactNumberOfHexDigits(numDigits, /*canHaveSeparators*/ false);
            if (escapedValue >= 0) {
                return String.fromCharCode(escapedValue);
            }
            else {
                error(ts.Diagnostics.Hexadecimal_digit_expected);
                return "";
            }
        }
        function scanExtendedUnicodeEscape() {
            var escapedValue = scanMinimumNumberOfHexDigits(1, /*canHaveSeparators*/ false);
            var isInvalidExtendedEscape = false;
            // Validate the value of the digit
            if (escapedValue < 0) {
                error(ts.Diagnostics.Hexadecimal_digit_expected);
                isInvalidExtendedEscape = true;
            }
            else if (escapedValue > 0x10FFFF) {
                error(ts.Diagnostics.An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive);
                isInvalidExtendedEscape = true;
            }
            if (pos >= end) {
                error(ts.Diagnostics.Unexpected_end_of_text);
                isInvalidExtendedEscape = true;
            }
            else if (text.charCodeAt(pos) === 125 /* closeBrace */) {
                // Only swallow the following character up if it's a '}'.
                pos++;
            }
            else {
                error(ts.Diagnostics.Unterminated_Unicode_escape_sequence);
                isInvalidExtendedEscape = true;
            }
            if (isInvalidExtendedEscape) {
                return "";
            }
            return utf16EncodeAsString(escapedValue);
        }
        // Derived from the 10.1.1 UTF16Encoding of the ES6 Spec.
        function utf16EncodeAsString(codePoint) {
            ts.Debug.assert(0x0 <= codePoint && codePoint <= 0x10FFFF);
            if (codePoint <= 65535) {
                return String.fromCharCode(codePoint);
            }
            var codeUnit1 = Math.floor((codePoint - 65536) / 1024) + 0xD800;
            var codeUnit2 = ((codePoint - 65536) % 1024) + 0xDC00;
            return String.fromCharCode(codeUnit1, codeUnit2);
        }
        // Current character is known to be a backslash. Check for Unicode escape of the form '\uXXXX'
        // and return code point value if valid Unicode escape is found. Otherwise return -1.
        function peekUnicodeEscape() {
            if (pos + 5 < end && text.charCodeAt(pos + 1) === 117 /* u */) {
                var start_1 = pos;
                pos += 2;
                var value = scanExactNumberOfHexDigits(4, /*canHaveSeparators*/ false);
                pos = start_1;
                return value;
            }
            return -1;
        }
        function scanIdentifierParts() {
            var result = "";
            var start = pos;
            while (pos < end) {
                var ch = text.charCodeAt(pos);
                if (isIdentifierPart(ch, languageVersion)) {
                    pos++;
                }
                else if (ch === 92 /* backslash */) {
                    ch = peekUnicodeEscape();
                    if (!(ch >= 0 && isIdentifierPart(ch, languageVersion))) {
                        break;
                    }
                    result += text.substring(start, pos);
                    result += String.fromCharCode(ch);
                    // Valid Unicode escape is always six characters
                    pos += 6;
                    start = pos;
                }
                else {
                    break;
                }
            }
            result += text.substring(start, pos);
            return result;
        }
        function getIdentifierToken() {
            // Reserved words are between 2 and 11 characters long and start with a lowercase letter
            var len = tokenValue.length;
            if (len >= 2 && len <= 11) {
                var ch = tokenValue.charCodeAt(0);
                if (ch >= 97 /* a */ && ch <= 122 /* z */) {
                    token = textToToken.get(tokenValue);
                    if (token !== undefined) {
                        return token;
                    }
                }
            }
            return token = 71 /* Identifier */;
        }
        function scanBinaryOrOctalDigits(base) {
            ts.Debug.assert(base === 2 || base === 8, "Expected either base 2 or base 8");
            var value = 0;
            // For counting number of digits; Valid binaryIntegerLiteral must have at least one binary digit following B or b.
            // Similarly valid octalIntegerLiteral must have at least one octal digit following o or O.
            var numberOfDigits = 0;
            var separatorAllowed = false;
            var isPreviousTokenSeparator = false;
            while (true) {
                var ch = text.charCodeAt(pos);
                // Numeric separators are allowed anywhere within a numeric literal, except not at the beginning, or following another separator
                if (ch === 95 /* _ */) {
                    tokenFlags |= 512 /* ContainsSeparator */;
                    if (separatorAllowed) {
                        separatorAllowed = false;
                        isPreviousTokenSeparator = true;
                    }
                    else if (isPreviousTokenSeparator) {
                        error(ts.Diagnostics.Multiple_consecutive_numeric_separators_are_not_permitted, pos, 1);
                    }
                    else {
                        error(ts.Diagnostics.Numeric_separators_are_not_allowed_here, pos, 1);
                    }
                    pos++;
                    continue;
                }
                separatorAllowed = true;
                var valueOfCh = ch - 48 /* _0 */;
                if (!isDigit(ch) || valueOfCh >= base) {
                    break;
                }
                value = value * base + valueOfCh;
                pos++;
                numberOfDigits++;
                isPreviousTokenSeparator = false;
            }
            // Invalid binaryIntegerLiteral or octalIntegerLiteral
            if (numberOfDigits === 0) {
                return -1;
            }
            if (text.charCodeAt(pos - 1) === 95 /* _ */) {
                // Literal ends with underscore - not allowed
                error(ts.Diagnostics.Numeric_separators_are_not_allowed_here, pos - 1, 1);
                return value;
            }
            return value;
        }
        function scan() {
            startPos = pos;
            tokenFlags = 0;
            while (true) {
                tokenPos = pos;
                if (pos >= end) {
                    return token = 1 /* EndOfFileToken */;
                }
                var ch = text.charCodeAt(pos);
                // Special handling for shebang
                if (ch === 35 /* hash */ && pos === 0 && isShebangTrivia(text, pos)) {
                    pos = scanShebangTrivia(text, pos);
                    if (skipTrivia) {
                        continue;
                    }
                    else {
                        return token = 6 /* ShebangTrivia */;
                    }
                }
                switch (ch) {
                    case 10 /* lineFeed */:
                    case 13 /* carriageReturn */:
                        tokenFlags |= 1 /* PrecedingLineBreak */;
                        if (skipTrivia) {
                            pos++;
                            continue;
                        }
                        else {
                            if (ch === 13 /* carriageReturn */ && pos + 1 < end && text.charCodeAt(pos + 1) === 10 /* lineFeed */) {
                                // consume both CR and LF
                                pos += 2;
                            }
                            else {
                                pos++;
                            }
                            return token = 4 /* NewLineTrivia */;
                        }
                    case 9 /* tab */:
                    case 11 /* verticalTab */:
                    case 12 /* formFeed */:
                    case 32 /* space */:
                        if (skipTrivia) {
                            pos++;
                            continue;
                        }
                        else {
                            while (pos < end && isWhiteSpaceSingleLine(text.charCodeAt(pos))) {
                                pos++;
                            }
                            return token = 5 /* WhitespaceTrivia */;
                        }
                    case 33 /* exclamation */:
                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
                            if (text.charCodeAt(pos + 2) === 61 /* equals */) {
                                return pos += 3, token = 35 /* ExclamationEqualsEqualsToken */;
                            }
                            return pos += 2, token = 33 /* ExclamationEqualsToken */;
                        }
                        pos++;
                        return token = 51 /* ExclamationToken */;
                    case 34 /* doubleQuote */:
                    case 39 /* singleQuote */:
                        tokenValue = scanString();
                        return token = 9 /* StringLiteral */;
                    case 96 /* backtick */:
                        return token = scanTemplateAndSetTokenValue();
                    case 37 /* percent */:
                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
                            return pos += 2, token = 64 /* PercentEqualsToken */;
                        }
                        pos++;
                        return token = 42 /* PercentToken */;
                    case 38 /* ampersand */:
                        if (text.charCodeAt(pos + 1) === 38 /* ampersand */) {
                            return pos += 2, token = 53 /* AmpersandAmpersandToken */;
                        }
                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
                            return pos += 2, token = 68 /* AmpersandEqualsToken */;
                        }
                        pos++;
                        return token = 48 /* AmpersandToken */;
                    case 40 /* openParen */:
                        pos++;
                        return token = 19 /* OpenParenToken */;
                    case 41 /* closeParen */:
                        pos++;
                        return token = 20 /* CloseParenToken */;
                    case 42 /* asterisk */:
                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
                            return pos += 2, token = 61 /* AsteriskEqualsToken */;
                        }
                        if (text.charCodeAt(pos + 1) === 42 /* asterisk */) {
                            if (text.charCodeAt(pos + 2) === 61 /* equals */) {
                                return pos += 3, token = 62 /* AsteriskAsteriskEqualsToken */;
                            }
                            return pos += 2, token = 40 /* AsteriskAsteriskToken */;
                        }
                        pos++;
                        return token = 39 /* AsteriskToken */;
                    case 43 /* plus */:
                        if (text.charCodeAt(pos + 1) === 43 /* plus */) {
                            return pos += 2, token = 43 /* PlusPlusToken */;
                        }
                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
                            return pos += 2, token = 59 /* PlusEqualsToken */;
                        }
                        pos++;
                        return token = 37 /* PlusToken */;
                    case 44 /* comma */:
                        pos++;
                        return token = 26 /* CommaToken */;
                    case 45 /* minus */:
                        if (text.charCodeAt(pos + 1) === 45 /* minus */) {
                            return pos += 2, token = 44 /* MinusMinusToken */;
                        }
                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
                            return pos += 2, token = 60 /* MinusEqualsToken */;
                        }
                        pos++;
                        return token = 38 /* MinusToken */;
                    case 46 /* dot */:
                        if (isDigit(text.charCodeAt(pos + 1))) {
                            tokenValue = scanNumber();
                            return token = 8 /* NumericLiteral */;
                        }
                        if (text.charCodeAt(pos + 1) === 46 /* dot */ && text.charCodeAt(pos + 2) === 46 /* dot */) {
                            return pos += 3, token = 24 /* DotDotDotToken */;
                        }
                        pos++;
                        return token = 23 /* DotToken */;
                    case 47 /* slash */:
                        // Single-line comment
                        if (text.charCodeAt(pos + 1) === 47 /* slash */) {
                            pos += 2;
                            while (pos < end) {
                                if (isLineBreak(text.charCodeAt(pos))) {
                                    break;
                                }
                                pos++;
                            }
                            if (skipTrivia) {
                                continue;
                            }
                            else {
                                return token = 2 /* SingleLineCommentTrivia */;
                            }
                        }
                        // Multi-line comment
                        if (text.charCodeAt(pos + 1) === 42 /* asterisk */) {
                            pos += 2;
                            if (text.charCodeAt(pos) === 42 /* asterisk */ && text.charCodeAt(pos + 1) !== 47 /* slash */) {
                                tokenFlags |= 2 /* PrecedingJSDocComment */;
                            }
                            var commentClosed = false;
                            while (pos < end) {
                                var ch_1 = text.charCodeAt(pos);
                                if (ch_1 === 42 /* asterisk */ && text.charCodeAt(pos + 1) === 47 /* slash */) {
                                    pos += 2;
                                    commentClosed = true;
                                    break;
                                }
                                if (isLineBreak(ch_1)) {
                                    tokenFlags |= 1 /* PrecedingLineBreak */;
                                }
                                pos++;
                            }
                            if (!commentClosed) {
                                error(ts.Diagnostics.Asterisk_Slash_expected);
                            }
                            if (skipTrivia) {
                                continue;
                            }
                            else {
                                if (!commentClosed) {
                                    tokenFlags |= 4 /* Unterminated */;
                                }
                                return token = 3 /* MultiLineCommentTrivia */;
                            }
                        }
                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
                            return pos += 2, token = 63 /* SlashEqualsToken */;
                        }
                        pos++;
                        return token = 41 /* SlashToken */;
                    case 48 /* _0 */:
                        if (pos + 2 < end && (text.charCodeAt(pos + 1) === 88 /* X */ || text.charCodeAt(pos + 1) === 120 /* x */)) {
                            pos += 2;
                            var value = scanMinimumNumberOfHexDigits(1, /*canHaveSeparators*/ true);
                            if (value < 0) {
                                error(ts.Diagnostics.Hexadecimal_digit_expected);
                                value = 0;
                            }
                            tokenValue = "" + value;
                            tokenFlags |= 64 /* HexSpecifier */;
                            return token = 8 /* NumericLiteral */;
                        }
                        else if (pos + 2 < end && (text.charCodeAt(pos + 1) === 66 /* B */ || text.charCodeAt(pos + 1) === 98 /* b */)) {
                            pos += 2;
                            var value = scanBinaryOrOctalDigits(/* base */ 2);
                            if (value < 0) {
                                error(ts.Diagnostics.Binary_digit_expected);
                                value = 0;
                            }
                            tokenValue = "" + value;
                            tokenFlags |= 128 /* BinarySpecifier */;
                            return token = 8 /* NumericLiteral */;
                        }
                        else if (pos + 2 < end && (text.charCodeAt(pos + 1) === 79 /* O */ || text.charCodeAt(pos + 1) === 111 /* o */)) {
                            pos += 2;
                            var value = scanBinaryOrOctalDigits(/* base */ 8);
                            if (value < 0) {
                                error(ts.Diagnostics.Octal_digit_expected);
                                value = 0;
                            }
                            tokenValue = "" + value;
                            tokenFlags |= 256 /* OctalSpecifier */;
                            return token = 8 /* NumericLiteral */;
                        }
                        // Try to parse as an octal
                        if (pos + 1 < end && isOctalDigit(text.charCodeAt(pos + 1))) {
                            tokenValue = "" + scanOctalDigits();
                            tokenFlags |= 32 /* Octal */;
                            return token = 8 /* NumericLiteral */;
                        }
                    // This fall-through is a deviation from the EcmaScript grammar. The grammar says that a leading zero
                    // can only be followed by an octal digit, a dot, or the end of the number literal. However, we are being
                    // permissive and allowing decimal digits of the form 08* and 09* (which many browsers also do).
                    // falls through
                    case 49 /* _1 */:
                    case 50 /* _2 */:
                    case 51 /* _3 */:
                    case 52 /* _4 */:
                    case 53 /* _5 */:
                    case 54 /* _6 */:
                    case 55 /* _7 */:
                    case 56 /* _8 */:
                    case 57 /* _9 */:
                        tokenValue = scanNumber();
                        return token = 8 /* NumericLiteral */;
                    case 58 /* colon */:
                        pos++;
                        return token = 56 /* ColonToken */;
                    case 59 /* semicolon */:
                        pos++;
                        return token = 25 /* SemicolonToken */;
                    case 60 /* lessThan */:
                        if (isConflictMarkerTrivia(text, pos)) {
                            pos = scanConflictMarkerTrivia(text, pos, error);
                            if (skipTrivia) {
                                continue;
                            }
                            else {
                                return token = 7 /* ConflictMarkerTrivia */;
                            }
                        }
                        if (text.charCodeAt(pos + 1) === 60 /* lessThan */) {
                            if (text.charCodeAt(pos + 2) === 61 /* equals */) {
                                return pos += 3, token = 65 /* LessThanLessThanEqualsToken */;
                            }
                            return pos += 2, token = 45 /* LessThanLessThanToken */;
                        }
                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
                            return pos += 2, token = 30 /* LessThanEqualsToken */;
                        }
                        if (languageVariant === 1 /* JSX */ &&
                            text.charCodeAt(pos + 1) === 47 /* slash */ &&
                            text.charCodeAt(pos + 2) !== 42 /* asterisk */) {
                            return pos += 2, token = 28 /* LessThanSlashToken */;
                        }
                        pos++;
                        return token = 27 /* LessThanToken */;
                    case 61 /* equals */:
                        if (isConflictMarkerTrivia(text, pos)) {
                            pos = scanConflictMarkerTrivia(text, pos, error);
                            if (skipTrivia) {
                                continue;
                            }
                            else {
                                return token = 7 /* ConflictMarkerTrivia */;
                            }
                        }
                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
                            if (text.charCodeAt(pos + 2) === 61 /* equals */) {
                                return pos += 3, token = 34 /* EqualsEqualsEqualsToken */;
                            }
                            return pos += 2, token = 32 /* EqualsEqualsToken */;
                        }
                        if (text.charCodeAt(pos + 1) === 62 /* greaterThan */) {
                            return pos += 2, token = 36 /* EqualsGreaterThanToken */;
                        }
                        pos++;
                        return token = 58 /* EqualsToken */;
                    case 62 /* greaterThan */:
                        if (isConflictMarkerTrivia(text, pos)) {
                            pos = scanConflictMarkerTrivia(text, pos, error);
                            if (skipTrivia) {
                                continue;
                            }
                            else {
                                return token = 7 /* ConflictMarkerTrivia */;
                            }
                        }
                        pos++;
                        return token = 29 /* GreaterThanToken */;
                    case 63 /* question */:
                        pos++;
                        return token = 55 /* QuestionToken */;
                    case 91 /* openBracket */:
                        pos++;
                        return token = 21 /* OpenBracketToken */;
                    case 93 /* closeBracket */:
                        pos++;
                        return token = 22 /* CloseBracketToken */;
                    case 94 /* caret */:
                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
                            return pos += 2, token = 70 /* CaretEqualsToken */;
                        }
                        pos++;
                        return token = 50 /* CaretToken */;
                    case 123 /* openBrace */:
                        pos++;
                        return token = 17 /* OpenBraceToken */;
                    case 124 /* bar */:
                        if (isConflictMarkerTrivia(text, pos)) {
                            pos = scanConflictMarkerTrivia(text, pos, error);
                            if (skipTrivia) {
                                continue;
                            }
                            else {
                                return token = 7 /* ConflictMarkerTrivia */;
                            }
                        }
                        if (text.charCodeAt(pos + 1) === 124 /* bar */) {
                            return pos += 2, token = 54 /* BarBarToken */;
                        }
                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
                            return pos += 2, token = 69 /* BarEqualsToken */;
                        }
                        pos++;
                        return token = 49 /* BarToken */;
                    case 125 /* closeBrace */:
                        pos++;
                        return token = 18 /* CloseBraceToken */;
                    case 126 /* tilde */:
                        pos++;
                        return token = 52 /* TildeToken */;
                    case 64 /* at */:
                        pos++;
                        return token = 57 /* AtToken */;
                    case 92 /* backslash */:
                        var cookedChar = peekUnicodeEscape();
                        if (cookedChar >= 0 && isIdentifierStart(cookedChar, languageVersion)) {
                            pos += 6;
                            tokenValue = String.fromCharCode(cookedChar) + scanIdentifierParts();
                            return token = getIdentifierToken();
                        }
                        error(ts.Diagnostics.Invalid_character);
                        pos++;
                        return token = 0 /* Unknown */;
                    default:
                        if (isIdentifierStart(ch, languageVersion)) {
                            pos++;
                            while (pos < end && isIdentifierPart(ch = text.charCodeAt(pos), languageVersion))
                                pos++;
                            tokenValue = text.substring(tokenPos, pos);
                            if (ch === 92 /* backslash */) {
                                tokenValue += scanIdentifierParts();
                            }
                            return token = getIdentifierToken();
                        }
                        else if (isWhiteSpaceSingleLine(ch)) {
                            pos++;
                            continue;
                        }
                        else if (isLineBreak(ch)) {
                            tokenFlags |= 1 /* PrecedingLineBreak */;
                            pos++;
                            continue;
                        }
                        error(ts.Diagnostics.Invalid_character);
                        pos++;
                        return token = 0 /* Unknown */;
                }
            }
        }
        function reScanGreaterToken() {
            if (token === 29 /* GreaterThanToken */) {
                if (text.charCodeAt(pos) === 62 /* greaterThan */) {
                    if (text.charCodeAt(pos + 1) === 62 /* greaterThan */) {
                        if (text.charCodeAt(pos + 2) === 61 /* equals */) {
                            return pos += 3, token = 67 /* GreaterThanGreaterThanGreaterThanEqualsToken */;
                        }
                        return pos += 2, token = 47 /* GreaterThanGreaterThanGreaterThanToken */;
                    }
                    if (text.charCodeAt(pos + 1) === 61 /* equals */) {
                        return pos += 2, token = 66 /* GreaterThanGreaterThanEqualsToken */;
                    }
                    pos++;
                    return token = 46 /* GreaterThanGreaterThanToken */;
                }
                if (text.charCodeAt(pos) === 61 /* equals */) {
                    pos++;
                    return token = 31 /* GreaterThanEqualsToken */;
                }
            }
            return token;
        }
        function reScanSlashToken() {
            if (token === 41 /* SlashToken */ || token === 63 /* SlashEqualsToken */) {
                var p = tokenPos + 1;
                var inEscape = false;
                var inCharacterClass = false;
                while (true) {
                    // If we reach the end of a file, or hit a newline, then this is an unterminated
                    // regex.  Report error and return what we have so far.
                    if (p >= end) {
                        tokenFlags |= 4 /* Unterminated */;
                        error(ts.Diagnostics.Unterminated_regular_expression_literal);
                        break;
                    }
                    var ch = text.charCodeAt(p);
                    if (isLineBreak(ch)) {
                        tokenFlags |= 4 /* Unterminated */;
                        error(ts.Diagnostics.Unterminated_regular_expression_literal);
                        break;
                    }
                    if (inEscape) {
                        // Parsing an escape character;
                        // reset the flag and just advance to the next char.
                        inEscape = false;
                    }
                    else if (ch === 47 /* slash */ && !inCharacterClass) {
                        // A slash within a character class is permissible,
                        // but in general it signals the end of the regexp literal.
                        p++;
                        break;
                    }
                    else if (ch === 91 /* openBracket */) {
                        inCharacterClass = true;
                    }
                    else if (ch === 92 /* backslash */) {
                        inEscape = true;
                    }
                    else if (ch === 93 /* closeBracket */) {
                        inCharacterClass = false;
                    }
                    p++;
                }
                while (p < end && isIdentifierPart(text.charCodeAt(p), languageVersion)) {
                    p++;
                }
                pos = p;
                tokenValue = text.substring(tokenPos, pos);
                token = 12 /* RegularExpressionLiteral */;
            }
            return token;
        }
        /**
         * Unconditionally back up and scan a template expression portion.
         */
        function reScanTemplateToken() {
            ts.Debug.assert(token === 18 /* CloseBraceToken */, "'reScanTemplateToken' should only be called on a '}'");
            pos = tokenPos;
            return token = scanTemplateAndSetTokenValue();
        }
        function reScanJsxToken() {
            pos = tokenPos = startPos;
            return token = scanJsxToken();
        }
        function scanJsxToken() {
            startPos = tokenPos = pos;
            if (pos >= end) {
                return token = 1 /* EndOfFileToken */;
            }
            var char = text.charCodeAt(pos);
            if (char === 60 /* lessThan */) {
                if (text.charCodeAt(pos + 1) === 47 /* slash */) {
                    pos += 2;
                    return token = 28 /* LessThanSlashToken */;
                }
                pos++;
                return token = 27 /* LessThanToken */;
            }
            if (char === 123 /* openBrace */) {
                pos++;
                return token = 17 /* OpenBraceToken */;
            }
            // First non-whitespace character on this line.
            var firstNonWhitespace = 0;
            // These initial values are special because the first line is:
            // firstNonWhitespace = 0 to indicate that we want leading whitspace,
            while (pos < end) {
                char = text.charCodeAt(pos);
                if (char === 123 /* openBrace */) {
                    break;
                }
                if (char === 60 /* lessThan */) {
                    if (isConflictMarkerTrivia(text, pos)) {
                        pos = scanConflictMarkerTrivia(text, pos, error);
                        return token = 7 /* ConflictMarkerTrivia */;
                    }
                    break;
                }
                // FirstNonWhitespace is 0, then we only see whitespaces so far. If we see a linebreak, we want to ignore that whitespaces.
                // i.e (- : whitespace)
                //      <div>----
                //      </div> becomes <div></div>
                //
                //      <div>----</div> becomes <div>----</div>
                if (isLineBreak(char) && firstNonWhitespace === 0) {
                    firstNonWhitespace = -1;
                }
                else if (!isWhiteSpaceLike(char)) {
                    firstNonWhitespace = pos;
                }
                pos++;
            }
            return firstNonWhitespace === -1 ? 11 /* JsxTextAllWhiteSpaces */ : 10 /* JsxText */;
        }
        // Scans a JSX identifier; these differ from normal identifiers in that
        // they allow dashes
        function scanJsxIdentifier() {
            if (tokenIsIdentifierOrKeyword(token)) {
                var firstCharPosition = pos;
                while (pos < end) {
                    var ch = text.charCodeAt(pos);
                    if (ch === 45 /* minus */ || ((firstCharPosition === pos) ? isIdentifierStart(ch, languageVersion) : isIdentifierPart(ch, languageVersion))) {
                        pos++;
                    }
                    else {
                        break;
                    }
                }
                tokenValue += text.substring(firstCharPosition, pos);
            }
            return token;
        }
        function scanJsxAttributeValue() {
            startPos = pos;
            switch (text.charCodeAt(pos)) {
                case 34 /* doubleQuote */:
                case 39 /* singleQuote */:
                    tokenValue = scanString(/*jsxAttributeString*/ true);
                    return token = 9 /* StringLiteral */;
                default:
                    // If this scans anything other than `{`, it's a parse error.
                    return scan();
            }
        }
        function scanJSDocToken() {
            startPos = tokenPos = pos;
            if (pos >= end) {
                return token = 1 /* EndOfFileToken */;
            }
            var ch = text.charCodeAt(pos);
            pos++;
            switch (ch) {
                case 9 /* tab */:
                case 11 /* verticalTab */:
                case 12 /* formFeed */:
                case 32 /* space */:
                    while (pos < end && isWhiteSpaceSingleLine(text.charCodeAt(pos))) {
                        pos++;
                    }
                    return token = 5 /* WhitespaceTrivia */;
                case 64 /* at */:
                    return token = 57 /* AtToken */;
                case 10 /* lineFeed */:
                case 13 /* carriageReturn */:
                    return token = 4 /* NewLineTrivia */;
                case 42 /* asterisk */:
                    return token = 39 /* AsteriskToken */;
                case 123 /* openBrace */:
                    return token = 17 /* OpenBraceToken */;
                case 125 /* closeBrace */:
                    return token = 18 /* CloseBraceToken */;
                case 91 /* openBracket */:
                    return token = 21 /* OpenBracketToken */;
                case 93 /* closeBracket */:
                    return token = 22 /* CloseBracketToken */;
                case 60 /* lessThan */:
                    return token = 27 /* LessThanToken */;
                case 61 /* equals */:
                    return token = 58 /* EqualsToken */;
                case 44 /* comma */:
                    return token = 26 /* CommaToken */;
                case 46 /* dot */:
                    return token = 23 /* DotToken */;
                case 96 /* backtick */:
                    while (pos < end && text.charCodeAt(pos) !== 96 /* backtick */) {
                        pos++;
                    }
                    tokenValue = text.substring(tokenPos + 1, pos);
                    pos++;
                    return token = 13 /* NoSubstitutionTemplateLiteral */;
            }
            if (isIdentifierStart(ch, 6 /* Latest */)) {
                while (isIdentifierPart(text.charCodeAt(pos), 6 /* Latest */) && pos < end) {
                    pos++;
                }
                tokenValue = text.substring(tokenPos, pos);
                return token = 71 /* Identifier */;
            }
            else {
                return token = 0 /* Unknown */;
            }
        }
        function speculationHelper(callback, isLookahead) {
            var savePos = pos;
            var saveStartPos = startPos;
            var saveTokenPos = tokenPos;
            var saveToken = token;
            var saveTokenValue = tokenValue;
            var saveTokenFlags = tokenFlags;
            var result = callback();
            // If our callback returned something 'falsy' or we're just looking ahead,
            // then unconditionally restore us to where we were.
            if (!result || isLookahead) {
                pos = savePos;
                startPos = saveStartPos;
                tokenPos = saveTokenPos;
                token = saveToken;
                tokenValue = saveTokenValue;
                tokenFlags = saveTokenFlags;
            }
            return result;
        }
        function scanRange(start, length, callback) {
            var saveEnd = end;
            var savePos = pos;
            var saveStartPos = startPos;
            var saveTokenPos = tokenPos;
            var saveToken = token;
            var saveTokenValue = tokenValue;
            var saveTokenFlags = tokenFlags;
            setText(text, start, length);
            var result = callback();
            end = saveEnd;
            pos = savePos;
            startPos = saveStartPos;
            tokenPos = saveTokenPos;
            token = saveToken;
            tokenValue = saveTokenValue;
            tokenFlags = saveTokenFlags;
            return result;
        }
        function lookAhead(callback) {
            return speculationHelper(callback, /*isLookahead*/ true);
        }
        function tryScan(callback) {
            return speculationHelper(callback, /*isLookahead*/ false);
        }
        function getText() {
            return text;
        }
        function setText(newText, start, length) {
            text = newText || "";
            end = length === undefined ? text.length : start + length;
            setTextPos(start || 0);
        }
        function setOnError(errorCallback) {
            onError = errorCallback;
        }
        function setScriptTarget(scriptTarget) {
            languageVersion = scriptTarget;
        }
        function setLanguageVariant(variant) {
            languageVariant = variant;
        }
        function setTextPos(textPos) {
            ts.Debug.assert(textPos >= 0);
            pos = textPos;
            startPos = textPos;
            tokenPos = textPos;
            token = 0 /* Unknown */;
            tokenValue = undefined;
            tokenFlags = 0;
        }
    }
    ts.createScanner = createScanner;
})(ts || (ts = {}));
/** Non-internal stuff goes here */
var ts;
(function (ts) {
    ts.emptyArray = [];
    function closeFileWatcher(watcher) {
        watcher.close();
    }
    ts.closeFileWatcher = closeFileWatcher;
    function isExternalModuleNameRelative(moduleName) {
        // TypeScript 1.0 spec (April 2014): 11.2.1
        // An external module name is "relative" if the first term is "." or "..".
        // Update: We also consider a path like `C:\foo.ts` "relative" because we do not search for it in `node_modules` or treat it as an ambient module.
        return ts.pathIsRelative(moduleName) || ts.isRootedDiskPath(moduleName);
    }
    ts.isExternalModuleNameRelative = isExternalModuleNameRelative;
    function sortAndDeduplicateDiagnostics(diagnostics) {
        return ts.sortAndDeduplicate(diagnostics, ts.compareDiagnostics);
    }
    ts.sortAndDeduplicateDiagnostics = sortAndDeduplicateDiagnostics;
    function toPath(fileName, basePath, getCanonicalFileName) {
        var nonCanonicalizedPath = ts.isRootedDiskPath(fileName)
            ? ts.normalizePath(fileName)
            : ts.getNormalizedAbsolutePath(fileName, basePath);
        return getCanonicalFileName(nonCanonicalizedPath);
    }
    ts.toPath = toPath;
    function hasEntries(map) {
        return !!map && !!map.size;
    }
    ts.hasEntries = hasEntries;
})(ts || (ts = {}));
/* @internal */
(function (ts) {
    ts.resolvingEmptyArray = [];
    ts.emptyMap = ts.createMap();
    ts.emptyUnderscoreEscapedMap = ts.emptyMap;
    ts.externalHelpersModuleNameText = "tslib";
    function getDeclarationOfKind(symbol, kind) {
        var declarations = symbol.declarations;
        if (declarations) {
            for (var _i = 0, declarations_1 = declarations; _i < declarations_1.length; _i++) {
                var declaration = declarations_1[_i];
                if (declaration.kind === kind) {
                    return declaration;
                }
            }
        }
        return undefined;
    }
    ts.getDeclarationOfKind = getDeclarationOfKind;
    /** Create a new escaped identifier map. */
    function createUnderscoreEscapedMap() {
        return new ts.MapCtr();
    }
    ts.createUnderscoreEscapedMap = createUnderscoreEscapedMap;
    function createSymbolTable(symbols) {
        var result = ts.createMap();
        if (symbols) {
            for (var _i = 0, symbols_1 = symbols; _i < symbols_1.length; _i++) {
                var symbol = symbols_1[_i];
                result.set(symbol.escapedName, symbol);
            }
        }
        return result;
    }
    ts.createSymbolTable = createSymbolTable;
    var stringWriter = createSingleLineStringWriter();
    function createSingleLineStringWriter() {
        var str = "";
        var writeText = function (text) { return str += text; };
        return {
            getText: function () { return str; },
            write: writeText,
            rawWrite: writeText,
            writeTextOfNode: writeText,
            writeKeyword: writeText,
            writeOperator: writeText,
            writePunctuation: writeText,
            writeSpace: writeText,
            writeStringLiteral: writeText,
            writeLiteral: writeText,
            writeParameter: writeText,
            writeProperty: writeText,
            writeSymbol: writeText,
            getTextPos: function () { return str.length; },
            getLine: function () { return 0; },
            getColumn: function () { return 0; },
            getIndent: function () { return 0; },
            isAtStartOfLine: function () { return false; },
            // Completely ignore indentation for string writers.  And map newlines to
            // a single space.
            writeLine: function () { return str += " "; },
            increaseIndent: ts.noop,
            decreaseIndent: ts.noop,
            clear: function () { return str = ""; },
            trackSymbol: ts.noop,
            reportInaccessibleThisError: ts.noop,
            reportInaccessibleUniqueSymbolError: ts.noop,
            reportPrivateInBaseOfClassExpression: ts.noop,
        };
    }
    function changesAffectModuleResolution(oldOptions, newOptions) {
        return !oldOptions ||
            (oldOptions.module !== newOptions.module) ||
            (oldOptions.moduleResolution !== newOptions.moduleResolution) ||
            (oldOptions.noResolve !== newOptions.noResolve) ||
            (oldOptions.target !== newOptions.target) ||
            (oldOptions.noLib !== newOptions.noLib) ||
            (oldOptions.jsx !== newOptions.jsx) ||
            (oldOptions.allowJs !== newOptions.allowJs) ||
            (oldOptions.rootDir !== newOptions.rootDir) ||
            (oldOptions.configFilePath !== newOptions.configFilePath) ||
            (oldOptions.baseUrl !== newOptions.baseUrl) ||
            (oldOptions.maxNodeModuleJsDepth !== newOptions.maxNodeModuleJsDepth) ||
            !ts.arrayIsEqualTo(oldOptions.lib, newOptions.lib) ||
            !ts.arrayIsEqualTo(oldOptions.typeRoots, newOptions.typeRoots) ||
            !ts.arrayIsEqualTo(oldOptions.rootDirs, newOptions.rootDirs) ||
            !ts.equalOwnProperties(oldOptions.paths, newOptions.paths);
    }
    ts.changesAffectModuleResolution = changesAffectModuleResolution;
    function findAncestor(node, callback) {
        while (node) {
            var result = callback(node);
            if (result === "quit") {
                return undefined;
            }
            else if (result) {
                return node;
            }
            node = node.parent;
        }
        return undefined;
    }
    ts.findAncestor = findAncestor;
    function forEachEntry(map, callback) {
        var _a;
        var iterator = map.entries();
        for (var _b = iterator.next(), pair = _b.value, done = _b.done; !done; _a = iterator.next(), pair = _a.value, done = _a.done, _a) {
            var key = pair[0], value = pair[1];
            var result = callback(value, key);
            if (result) {
                return result;
            }
        }
        return undefined;
    }
    ts.forEachEntry = forEachEntry;
    function forEachKey(map, callback) {
        var _a;
        var iterator = map.keys();
        for (var _b = iterator.next(), key = _b.value, done = _b.done; !done; _a = iterator.next(), key = _a.value, done = _a.done, _a) {
            var result = callback(key);
            if (result) {
                return result;
            }
        }
        return undefined;
    }
    ts.forEachKey = forEachKey;
    function copyEntries(source, target) {
        source.forEach(function (value, key) {
            target.set(key, value);
        });
    }
    ts.copyEntries = copyEntries;
    function arrayToSet(array, makeKey) {
        return ts.arrayToMap(array, makeKey || (function (s) { return s; }), function () { return true; });
    }
    ts.arrayToSet = arrayToSet;
    function cloneMap(map) {
        var clone = ts.createMap();
        copyEntries(map, clone);
        return clone;
    }
    ts.cloneMap = cloneMap;
    function usingSingleLineStringWriter(action) {
        var oldString = stringWriter.getText();
        try {
            action(stringWriter);
            return stringWriter.getText();
        }
        finally {
            stringWriter.clear();
            stringWriter.writeKeyword(oldString);
        }
    }
    ts.usingSingleLineStringWriter = usingSingleLineStringWriter;
    function getFullWidth(node) {
        return node.end - node.pos;
    }
    ts.getFullWidth = getFullWidth;
    function getResolvedModule(sourceFile, moduleNameText) {
        return sourceFile && sourceFile.resolvedModules && sourceFile.resolvedModules.get(moduleNameText);
    }
    ts.getResolvedModule = getResolvedModule;
    function setResolvedModule(sourceFile, moduleNameText, resolvedModule) {
        if (!sourceFile.resolvedModules) {
            sourceFile.resolvedModules = ts.createMap();
        }
        sourceFile.resolvedModules.set(moduleNameText, resolvedModule);
    }
    ts.setResolvedModule = setResolvedModule;
    function setResolvedTypeReferenceDirective(sourceFile, typeReferenceDirectiveName, resolvedTypeReferenceDirective) {
        if (!sourceFile.resolvedTypeReferenceDirectiveNames) {
            sourceFile.resolvedTypeReferenceDirectiveNames = ts.createMap();
        }
        sourceFile.resolvedTypeReferenceDirectiveNames.set(typeReferenceDirectiveName, resolvedTypeReferenceDirective);
    }
    ts.setResolvedTypeReferenceDirective = setResolvedTypeReferenceDirective;
    function moduleResolutionIsEqualTo(oldResolution, newResolution) {
        return oldResolution.isExternalLibraryImport === newResolution.isExternalLibraryImport &&
            oldResolution.extension === newResolution.extension &&
            oldResolution.resolvedFileName === newResolution.resolvedFileName &&
            oldResolution.originalPath === newResolution.originalPath &&
            packageIdIsEqual(oldResolution.packageId, newResolution.packageId);
    }
    ts.moduleResolutionIsEqualTo = moduleResolutionIsEqualTo;
    function packageIdIsEqual(a, b) {
        return a === b || !!a && !!b && a.name === b.name && a.subModuleName === b.subModuleName && a.version === b.version;
    }
    function packageIdToString(_a) {
        var name = _a.name, subModuleName = _a.subModuleName, version = _a.version;
        var fullName = subModuleName ? name + "/" + subModuleName : name;
        return fullName + "@" + version;
    }
    ts.packageIdToString = packageIdToString;
    function typeDirectiveIsEqualTo(oldResolution, newResolution) {
        return oldResolution.resolvedFileName === newResolution.resolvedFileName && oldResolution.primary === newResolution.primary;
    }
    ts.typeDirectiveIsEqualTo = typeDirectiveIsEqualTo;
    function hasChangesInResolutions(names, newResolutions, oldResolutions, comparer) {
        ts.Debug.assert(names.length === newResolutions.length);
        for (var i = 0; i < names.length; i++) {
            var newResolution = newResolutions[i];
            var oldResolution = oldResolutions && oldResolutions.get(names[i]);
            var changed = oldResolution
                ? !newResolution || !comparer(oldResolution, newResolution)
                : newResolution;
            if (changed) {
                return true;
            }
        }
        return false;
    }
    ts.hasChangesInResolutions = hasChangesInResolutions;
    // Returns true if this node contains a parse error anywhere underneath it.
    function containsParseError(node) {
        aggregateChildData(node);
        return (node.flags & 131072 /* ThisNodeOrAnySubNodesHasError */) !== 0;
    }
    ts.containsParseError = containsParseError;
    function aggregateChildData(node) {
        if (!(node.flags & 262144 /* HasAggregatedChildData */)) {
            // A node is considered to contain a parse error if:
            //  a) the parser explicitly marked that it had an error
            //  b) any of it's children reported that it had an error.
            var thisNodeOrAnySubNodesHasError = ((node.flags & 32768 /* ThisNodeHasError */) !== 0) ||
                ts.forEachChild(node, containsParseError);
            // If so, mark ourselves accordingly.
            if (thisNodeOrAnySubNodesHasError) {
                node.flags |= 131072 /* ThisNodeOrAnySubNodesHasError */;
            }
            // Also mark that we've propagated the child information to this node.  This way we can
            // always consult the bit directly on this node without needing to check its children
            // again.
            node.flags |= 262144 /* HasAggregatedChildData */;
        }
    }
    function getSourceFileOfNode(node) {
        while (node && node.kind !== 274 /* SourceFile */) {
            node = node.parent;
        }
        return node;
    }
    ts.getSourceFileOfNode = getSourceFileOfNode;
    function isStatementWithLocals(node) {
        switch (node.kind) {
            case 213 /* Block */:
            case 241 /* CaseBlock */:
            case 220 /* ForStatement */:
            case 221 /* ForInStatement */:
            case 222 /* ForOfStatement */:
                return true;
        }
        return false;
    }
    ts.isStatementWithLocals = isStatementWithLocals;
    function getStartPositionOfLine(line, sourceFile) {
        ts.Debug.assert(line >= 0);
        return ts.getLineStarts(sourceFile)[line];
    }
    ts.getStartPositionOfLine = getStartPositionOfLine;
    // This is a useful function for debugging purposes.
    function nodePosToString(node) {
        var file = getSourceFileOfNode(node);
        var loc = ts.getLineAndCharacterOfPosition(file, node.pos);
        return file.fileName + "(" + (loc.line + 1) + "," + (loc.character + 1) + ")";
    }
    ts.nodePosToString = nodePosToString;
    function getEndLinePosition(line, sourceFile) {
        ts.Debug.assert(line >= 0);
        var lineStarts = ts.getLineStarts(sourceFile);
        var lineIndex = line;
        var sourceText = sourceFile.text;
        if (lineIndex + 1 === lineStarts.length) {
            // last line - return EOF
            return sourceText.length - 1;
        }
        else {
            // current line start
            var start = lineStarts[lineIndex];
            // take the start position of the next line - 1 = it should be some line break
            var pos = lineStarts[lineIndex + 1] - 1;
            ts.Debug.assert(ts.isLineBreak(sourceText.charCodeAt(pos)));
            // walk backwards skipping line breaks, stop the the beginning of current line.
            // i.e:
            // <some text>
            // $ <- end of line for this position should match the start position
            while (start <= pos && ts.isLineBreak(sourceText.charCodeAt(pos))) {
                pos--;
            }
            return pos;
        }
    }
    ts.getEndLinePosition = getEndLinePosition;
    /**
     * Returns a value indicating whether a name is unique globally or within the current file.
     * Note: This does not consider whether a name appears as a free identifier or not, so at the expression `x.y` this includes both `x` and `y`.
     */
    function isFileLevelUniqueName(sourceFile, name, hasGlobalName) {
        return !(hasGlobalName && hasGlobalName(name)) && !sourceFile.identifiers.has(name);
    }
    ts.isFileLevelUniqueName = isFileLevelUniqueName;
    // Returns true if this node is missing from the actual source code. A 'missing' node is different
    // from 'undefined/defined'. When a node is undefined (which can happen for optional nodes
    // in the tree), it is definitely missing. However, a node may be defined, but still be
    // missing.  This happens whenever the parser knows it needs to parse something, but can't
    // get anything in the source code that it expects at that location. For example:
    //
    //          let a: ;
    //
    // Here, the Type in the Type-Annotation is not-optional (as there is a colon in the source
    // code). So the parser will attempt to parse out a type, and will create an actual node.
    // However, this node will be 'missing' in the sense that no actual source-code/tokens are
    // contained within it.
    function nodeIsMissing(node) {
        if (node === undefined) {
            return true;
        }
        return node.pos === node.end && node.pos >= 0 && node.kind !== 1 /* EndOfFileToken */;
    }
    ts.nodeIsMissing = nodeIsMissing;
    function nodeIsPresent(node) {
        return !nodeIsMissing(node);
    }
    ts.nodeIsPresent = nodeIsPresent;
    /**
     * Appends a range of value to begin of an array, returning the array.
     *
     * @param to The array to which `value` is to be appended. If `to` is `undefined`, a new array
     * is created if `value` was appended.
     * @param from The values to append to the array. If `from` is `undefined`, nothing is
     * appended. If an element of `from` is `undefined`, that element is not appended.
     */
    function prependStatements(to, from) {
        if (from === undefined || from.length === 0)
            return to;
        if (to === undefined)
            return from.slice();
        var prologue = to.length && isPrologueDirective(to[0]) && to.shift();
        to.unshift.apply(to, from);
        if (prologue) {
            to.unshift(prologue);
        }
        return to;
    }
    ts.prependStatements = prependStatements;
    /**
     * Determine if the given comment is a triple-slash
     *
     * @return true if the comment is a triple-slash comment else false
     */
    function isRecognizedTripleSlashComment(text, commentPos, commentEnd) {
        // Verify this is /// comment, but do the regexp match only when we first can find /// in the comment text
        // so that we don't end up computing comment string and doing match for all // comments
        if (text.charCodeAt(commentPos + 1) === 47 /* slash */ &&
            commentPos + 2 < commentEnd &&
            text.charCodeAt(commentPos + 2) === 47 /* slash */) {
            var textSubStr = text.substring(commentPos, commentEnd);
            return textSubStr.match(ts.fullTripleSlashReferencePathRegEx) ||
                textSubStr.match(ts.fullTripleSlashAMDReferencePathRegEx) ||
                textSubStr.match(fullTripleSlashReferenceTypeReferenceDirectiveRegEx) ||
                textSubStr.match(defaultLibReferenceRegEx) ?
                true : false;
        }
        return false;
    }
    ts.isRecognizedTripleSlashComment = isRecognizedTripleSlashComment;
    function isPinnedComment(text, start) {
        return text.charCodeAt(start + 1) === 42 /* asterisk */ &&
            text.charCodeAt(start + 2) === 33 /* exclamation */;
    }
    ts.isPinnedComment = isPinnedComment;
    function getTokenPosOfNode(node, sourceFile, includeJsDoc) {
        // With nodes that have no width (i.e. 'Missing' nodes), we actually *don't*
        // want to skip trivia because this will launch us forward to the next token.
        if (nodeIsMissing(node)) {
            return node.pos;
        }
        if (ts.isJSDocNode(node)) {
            return ts.skipTrivia((sourceFile || getSourceFileOfNode(node)).text, node.pos, /*stopAfterLineBreak*/ false, /*stopAtComments*/ true);
        }
        if (includeJsDoc && ts.hasJSDocNodes(node)) {
            return getTokenPosOfNode(node.jsDoc[0]);
        }
        // For a syntax list, it is possible that one of its children has JSDocComment nodes, while
        // the syntax list itself considers them as normal trivia. Therefore if we simply skip
        // trivia for the list, we may have skipped the JSDocComment as well. So we should process its
        // first child to determine the actual position of its first token.
        if (node.kind === 299 /* SyntaxList */ && node._children.length > 0) {
            return getTokenPosOfNode(node._children[0], sourceFile, includeJsDoc);
        }
        return ts.skipTrivia((sourceFile || getSourceFileOfNode(node)).text, node.pos);
    }
    ts.getTokenPosOfNode = getTokenPosOfNode;
    function getNonDecoratorTokenPosOfNode(node, sourceFile) {
        if (nodeIsMissing(node) || !node.decorators) {
            return getTokenPosOfNode(node, sourceFile);
        }
        return ts.skipTrivia((sourceFile || getSourceFileOfNode(node)).text, node.decorators.end);
    }
    ts.getNonDecoratorTokenPosOfNode = getNonDecoratorTokenPosOfNode;
    function getSourceTextOfNodeFromSourceFile(sourceFile, node, includeTrivia) {
        if (includeTrivia === void 0) { includeTrivia = false; }
        return getTextOfNodeFromSourceText(sourceFile.text, node, includeTrivia);
    }
    ts.getSourceTextOfNodeFromSourceFile = getSourceTextOfNodeFromSourceFile;
    function getTextOfNodeFromSourceText(sourceText, node, includeTrivia) {
        if (includeTrivia === void 0) { includeTrivia = false; }
        if (nodeIsMissing(node)) {
            return "";
        }
        return sourceText.substring(includeTrivia ? node.pos : ts.skipTrivia(sourceText, node.pos), node.end);
    }
    ts.getTextOfNodeFromSourceText = getTextOfNodeFromSourceText;
    function getTextOfNode(node, includeTrivia) {
        if (includeTrivia === void 0) { includeTrivia = false; }
        return getSourceTextOfNodeFromSourceFile(getSourceFileOfNode(node), node, includeTrivia);
    }
    ts.getTextOfNode = getTextOfNode;
    function getPos(range) {
        return range.pos;
    }
    /**
     * Note: it is expected that the `nodeArray` and the `node` are within the same file.
     * For example, searching for a `SourceFile` in a `SourceFile[]` wouldn't work.
     */
    function indexOfNode(nodeArray, node) {
        return ts.binarySearch(nodeArray, node, getPos, ts.compareValues);
    }
    ts.indexOfNode = indexOfNode;
    /**
     * Gets flags that control emit behavior of a node.
     */
    function getEmitFlags(node) {
        var emitNode = node.emitNode;
        return emitNode && emitNode.flags || 0;
    }
    ts.getEmitFlags = getEmitFlags;
    function getLiteralText(node, sourceFile) {
        // If we don't need to downlevel and we can reach the original source text using
        // the node's parent reference, then simply get the text as it was originally written.
        if (!nodeIsSynthesized(node) && node.parent && !(ts.isNumericLiteral(node) && node.numericLiteralFlags & 512 /* ContainsSeparator */)) {
            return getSourceTextOfNodeFromSourceFile(sourceFile, node);
        }
        var escapeText = getEmitFlags(node) & 16777216 /* NoAsciiEscaping */ ? escapeString : escapeNonAsciiString;
        // If we can't reach the original source text, use the canonical form if it's a number,
        // or a (possibly escaped) quoted form of the original text if it's string-like.
        switch (node.kind) {
            case 9 /* StringLiteral */:
                if (node.singleQuote) {
                    return "'" + escapeText(node.text, 39 /* singleQuote */) + "'";
                }
                else {
                    return '"' + escapeText(node.text, 34 /* doubleQuote */) + '"';
                }
            case 13 /* NoSubstitutionTemplateLiteral */:
                return "`" + escapeText(node.text, 96 /* backtick */) + "`";
            case 14 /* TemplateHead */:
                // tslint:disable-next-line no-invalid-template-strings
                return "`" + escapeText(node.text, 96 /* backtick */) + "${";
            case 15 /* TemplateMiddle */:
                // tslint:disable-next-line no-invalid-template-strings
                return "}" + escapeText(node.text, 96 /* backtick */) + "${";
            case 16 /* TemplateTail */:
                return "}" + escapeText(node.text, 96 /* backtick */) + "`";
            case 8 /* NumericLiteral */:
            case 12 /* RegularExpressionLiteral */:
                return node.text;
        }
        return ts.Debug.fail("Literal kind '" + node.kind + "' not accounted for.");
    }
    ts.getLiteralText = getLiteralText;
    function getTextOfConstantValue(value) {
        return ts.isString(value) ? '"' + escapeNonAsciiString(value) + '"' : "" + value;
    }
    ts.getTextOfConstantValue = getTextOfConstantValue;
    // Add an extra underscore to identifiers that start with two underscores to avoid issues with magic names like '__proto__'
    function escapeLeadingUnderscores(identifier) {
        return (identifier.length >= 2 && identifier.charCodeAt(0) === 95 /* _ */ && identifier.charCodeAt(1) === 95 /* _ */ ? "_" + identifier : identifier);
    }
    ts.escapeLeadingUnderscores = escapeLeadingUnderscores;
    /**
     * @deprecated Use `id.escapedText` to get the escaped text of an Identifier.
     * @param identifier The identifier to escape
     */
    function escapeIdentifier(identifier) {
        return identifier;
    }
    ts.escapeIdentifier = escapeIdentifier;
    // Make an identifier from an external module name by extracting the string after the last "/" and replacing
    // all non-alphanumeric characters with underscores
    function makeIdentifierFromModuleName(moduleName) {
        return ts.getBaseFileName(moduleName).replace(/^(\d)/, "_$1").replace(/\W/g, "_");
    }
    ts.makeIdentifierFromModuleName = makeIdentifierFromModuleName;
    function isBlockOrCatchScoped(declaration) {
        return (ts.getCombinedNodeFlags(declaration) & 3 /* BlockScoped */) !== 0 ||
            isCatchClauseVariableDeclarationOrBindingElement(declaration);
    }
    ts.isBlockOrCatchScoped = isBlockOrCatchScoped;
    function isCatchClauseVariableDeclarationOrBindingElement(declaration) {
        var node = getRootDeclaration(declaration);
        return node.kind === 232 /* VariableDeclaration */ && node.parent.kind === 269 /* CatchClause */;
    }
    ts.isCatchClauseVariableDeclarationOrBindingElement = isCatchClauseVariableDeclarationOrBindingElement;
    function isAmbientModule(node) {
        return ts.isModuleDeclaration(node) && (node.name.kind === 9 /* StringLiteral */ || isGlobalScopeAugmentation(node));
    }
    ts.isAmbientModule = isAmbientModule;
    function isModuleWithStringLiteralName(node) {
        return ts.isModuleDeclaration(node) && node.name.kind === 9 /* StringLiteral */;
    }
    ts.isModuleWithStringLiteralName = isModuleWithStringLiteralName;
    function isNonGlobalAmbientModule(node) {
        return ts.isModuleDeclaration(node) && ts.isStringLiteral(node.name);
    }
    ts.isNonGlobalAmbientModule = isNonGlobalAmbientModule;
    /**
     * An effective module (namespace) declaration is either
     * 1. An actual declaration: namespace X { ... }
     * 2. A Javascript declaration, which is:
     *    An identifier in a nested property access expression: Y in `X.Y.Z = { ... }`
     */
    function isEffectiveModuleDeclaration(node) {
        return ts.isModuleDeclaration(node) || ts.isIdentifier(node);
    }
    ts.isEffectiveModuleDeclaration = isEffectiveModuleDeclaration;
    /** Given a symbol for a module, checks that it is a shorthand ambient module. */
    function isShorthandAmbientModuleSymbol(moduleSymbol) {
        return isShorthandAmbientModule(moduleSymbol.valueDeclaration);
    }
    ts.isShorthandAmbientModuleSymbol = isShorthandAmbientModuleSymbol;
    function isShorthandAmbientModule(node) {
        // The only kind of module that can be missing a body is a shorthand ambient module.
        return node && node.kind === 239 /* ModuleDeclaration */ && (!node.body);
    }
    function isBlockScopedContainerTopLevel(node) {
        return node.kind === 274 /* SourceFile */ ||
            node.kind === 239 /* ModuleDeclaration */ ||
            ts.isFunctionLike(node);
    }
    ts.isBlockScopedContainerTopLevel = isBlockScopedContainerTopLevel;
    function isGlobalScopeAugmentation(module) {
        return !!(module.flags & 512 /* GlobalAugmentation */);
    }
    ts.isGlobalScopeAugmentation = isGlobalScopeAugmentation;
    function isExternalModuleAugmentation(node) {
        return isAmbientModule(node) && isModuleAugmentationExternal(node);
    }
    ts.isExternalModuleAugmentation = isExternalModuleAugmentation;
    function isModuleAugmentationExternal(node) {
        // external module augmentation is a ambient module declaration that is either:
        // - defined in the top level scope and source file is an external module
        // - defined inside ambient module declaration located in the top level scope and source file not an external module
        switch (node.parent.kind) {
            case 274 /* SourceFile */:
                return ts.isExternalModule(node.parent);
            case 240 /* ModuleBlock */:
                return isAmbientModule(node.parent.parent) && ts.isSourceFile(node.parent.parent.parent) && !ts.isExternalModule(node.parent.parent.parent);
        }
        return false;
    }
    ts.isModuleAugmentationExternal = isModuleAugmentationExternal;
    function isEffectiveExternalModule(node, compilerOptions) {
        return ts.isExternalModule(node) || compilerOptions.isolatedModules || ((ts.getEmitModuleKind(compilerOptions) === ts.ModuleKind.CommonJS) && !!node.commonJsModuleIndicator);
    }
    ts.isEffectiveExternalModule = isEffectiveExternalModule;
    function isBlockScope(node, parentNode) {
        switch (node.kind) {
            case 274 /* SourceFile */:
            case 241 /* CaseBlock */:
            case 269 /* CatchClause */:
            case 239 /* ModuleDeclaration */:
            case 220 /* ForStatement */:
            case 221 /* ForInStatement */:
            case 222 /* ForOfStatement */:
            case 155 /* Constructor */:
            case 154 /* MethodDeclaration */:
            case 156 /* GetAccessor */:
            case 157 /* SetAccessor */:
            case 234 /* FunctionDeclaration */:
            case 192 /* FunctionExpression */:
            case 193 /* ArrowFunction */:
                return true;
            case 213 /* Block */:
                // function block is not considered block-scope container
                // see comment in binder.ts: bind(...), case for SyntaxKind.Block
                return !ts.isFunctionLike(parentNode);
        }
        return false;
    }
    ts.isBlockScope = isBlockScope;
    function isDeclarationWithTypeParameters(node) {
        switch (node.kind) {
            case 158 /* CallSignature */:
            case 159 /* ConstructSignature */:
            case 153 /* MethodSignature */:
            case 160 /* IndexSignature */:
            case 163 /* FunctionType */:
            case 164 /* ConstructorType */:
            case 284 /* JSDocFunctionType */:
            case 235 /* ClassDeclaration */:
            case 205 /* ClassExpression */:
            case 236 /* InterfaceDeclaration */:
            case 237 /* TypeAliasDeclaration */:
            case 296 /* JSDocTemplateTag */:
            case 234 /* FunctionDeclaration */:
            case 154 /* MethodDeclaration */:
            case 155 /* Constructor */:
            case 156 /* GetAccessor */:
            case 157 /* SetAccessor */:
            case 192 /* FunctionExpression */:
            case 193 /* ArrowFunction */:
            case 292 /* JSDocCallbackTag */:
            case 297 /* JSDocTypedefTag */:
            case 288 /* JSDocSignature */:
                return true;
            default:
                ts.assertTypeIsNever(node);
                return false;
        }
    }
    ts.isDeclarationWithTypeParameters = isDeclarationWithTypeParameters;
    function isAnyImportSyntax(node) {
        switch (node.kind) {
            case 244 /* ImportDeclaration */:
            case 243 /* ImportEqualsDeclaration */:
                return true;
            default:
                return false;
        }
    }
    ts.isAnyImportSyntax = isAnyImportSyntax;
    function isLateVisibilityPaintedStatement(node) {
        switch (node.kind) {
            case 244 /* ImportDeclaration */:
            case 243 /* ImportEqualsDeclaration */:
            case 214 /* VariableStatement */:
            case 235 /* ClassDeclaration */:
            case 234 /* FunctionDeclaration */:
            case 239 /* ModuleDeclaration */:
            case 237 /* TypeAliasDeclaration */:
            case 236 /* InterfaceDeclaration */:
            case 238 /* EnumDeclaration */:
                return true;
            default:
                return false;
        }
    }
    ts.isLateVisibilityPaintedStatement = isLateVisibilityPaintedStatement;
    function isAnyImportOrReExport(node) {
        return isAnyImportSyntax(node) || ts.isExportDeclaration(node);
    }
    ts.isAnyImportOrReExport = isAnyImportOrReExport;
    // Gets the nearest enclosing block scope container that has the provided node
    // as a descendant, that is not the provided node.
    function getEnclosingBlockScopeContainer(node) {
        return findAncestor(node.parent, function (current) { return isBlockScope(current, current.parent); });
    }
    ts.getEnclosingBlockScopeContainer = getEnclosingBlockScopeContainer;
    // Return display name of an identifier
    // Computed property names will just be emitted as "[<expr>]", where <expr> is the source
    // text of the expression in the computed property.
    function declarationNameToString(name) {
        return getFullWidth(name) === 0 ? "(Missing)" : getTextOfNode(name);
    }
    ts.declarationNameToString = declarationNameToString;
    function getNameFromIndexInfo(info) {
        return info.declaration ? declarationNameToString(info.declaration.parameters[0].name) : undefined;
    }
    ts.getNameFromIndexInfo = getNameFromIndexInfo;
    function getTextOfPropertyName(name) {
        switch (name.kind) {
            case 71 /* Identifier */:
                return name.escapedText;
            case 9 /* StringLiteral */:
            case 8 /* NumericLiteral */:
                return escapeLeadingUnderscores(name.text);
            case 147 /* ComputedPropertyName */:
                return isStringOrNumericLiteral(name.expression) ? escapeLeadingUnderscores(name.expression.text) : undefined; // TODO: GH#18217 Almost all uses of this assume the result to be defined!
            default:
                ts.Debug.assertNever(name);
        }
    }
    ts.getTextOfPropertyName = getTextOfPropertyName;
    function entityNameToString(name) {
        switch (name.kind) {
            case 71 /* Identifier */:
                return getFullWidth(name) === 0 ? ts.idText(name) : getTextOfNode(name);
            case 146 /* QualifiedName */:
                return entityNameToString(name.left) + "." + entityNameToString(name.right);
            case 185 /* PropertyAccessExpression */:
                return entityNameToString(name.expression) + "." + entityNameToString(name.name);
            default:
                throw ts.Debug.assertNever(name);
        }
    }
    ts.entityNameToString = entityNameToString;
    function createDiagnosticForNode(node, message, arg0, arg1, arg2, arg3) {
        var sourceFile = getSourceFileOfNode(node);
        return createDiagnosticForNodeInSourceFile(sourceFile, node, message, arg0, arg1, arg2, arg3);
    }
    ts.createDiagnosticForNode = createDiagnosticForNode;
    function createDiagnosticForNodeArray(sourceFile, nodes, message, arg0, arg1, arg2, arg3) {
        var start = ts.skipTrivia(sourceFile.text, nodes.pos);
        return ts.createFileDiagnostic(sourceFile, start, nodes.end - start, message, arg0, arg1, arg2, arg3);
    }
    ts.createDiagnosticForNodeArray = createDiagnosticForNodeArray;
    function createDiagnosticForNodeInSourceFile(sourceFile, node, message, arg0, arg1, arg2, arg3) {
        var span = getErrorSpanForNode(sourceFile, node);
        return ts.createFileDiagnostic(sourceFile, span.start, span.length, message, arg0, arg1, arg2, arg3);
    }
    ts.createDiagnosticForNodeInSourceFile = createDiagnosticForNodeInSourceFile;
    function createDiagnosticForNodeFromMessageChain(node, messageChain) {
        var sourceFile = getSourceFileOfNode(node);
        var span = getErrorSpanForNode(sourceFile, node);
        return {
            file: sourceFile,
            start: span.start,
            length: span.length,
            code: messageChain.code,
            category: messageChain.category,
            messageText: messageChain.next ? messageChain : messageChain.messageText
        };
    }
    ts.createDiagnosticForNodeFromMessageChain = createDiagnosticForNodeFromMessageChain;
    function getSpanOfTokenAtPosition(sourceFile, pos) {
        var scanner = ts.createScanner(sourceFile.languageVersion, /*skipTrivia*/ true, sourceFile.languageVariant, sourceFile.text, /*onError:*/ undefined, pos);
        scanner.scan();
        var start = scanner.getTokenPos();
        return ts.createTextSpanFromBounds(start, scanner.getTextPos());
    }
    ts.getSpanOfTokenAtPosition = getSpanOfTokenAtPosition;
    function getErrorSpanForArrowFunction(sourceFile, node) {
        var pos = ts.skipTrivia(sourceFile.text, node.pos);
        if (node.body && node.body.kind === 213 /* Block */) {
            var startLine = ts.getLineAndCharacterOfPosition(sourceFile, node.body.pos).line;
            var endLine = ts.getLineAndCharacterOfPosition(sourceFile, node.body.end).line;
            if (startLine < endLine) {
                // The arrow function spans multiple lines,
                // make the error span be the first line, inclusive.
                return ts.createTextSpan(pos, getEndLinePosition(startLine, sourceFile) - pos + 1);
            }
        }
        return ts.createTextSpanFromBounds(pos, node.end);
    }
    function getErrorSpanForNode(sourceFile, node) {
        var errorNode = node;
        switch (node.kind) {
            case 274 /* SourceFile */:
                var pos_1 = ts.skipTrivia(sourceFile.text, 0, /*stopAfterLineBreak*/ false);
                if (pos_1 === sourceFile.text.length) {
                    // file is empty - return span for the beginning of the file
                    return ts.createTextSpan(0, 0);
                }
                return getSpanOfTokenAtPosition(sourceFile, pos_1);
            // This list is a work in progress. Add missing node kinds to improve their error
            // spans.
            case 232 /* VariableDeclaration */:
            case 182 /* BindingElement */:
            case 235 /* ClassDeclaration */:
            case 205 /* ClassExpression */:
            case 236 /* InterfaceDeclaration */:
            case 239 /* ModuleDeclaration */:
            case 238 /* EnumDeclaration */:
            case 273 /* EnumMember */:
            case 234 /* FunctionDeclaration */:
            case 192 /* FunctionExpression */:
            case 154 /* MethodDeclaration */:
            case 156 /* GetAccessor */:
            case 157 /* SetAccessor */:
            case 237 /* TypeAliasDeclaration */:
            case 152 /* PropertyDeclaration */:
            case 151 /* PropertySignature */:
                errorNode = node.name;
                break;
            case 193 /* ArrowFunction */:
                return getErrorSpanForArrowFunction(sourceFile, node);
        }
        if (errorNode === undefined) {
            // If we don't have a better node, then just set the error on the first token of
            // construct.
            return getSpanOfTokenAtPosition(sourceFile, node.pos);
        }
        var isMissing = nodeIsMissing(errorNode);
        var pos = isMissing
            ? errorNode.pos
            : ts.skipTrivia(sourceFile.text, errorNode.pos);
        // These asserts should all be satisfied for a properly constructed `errorNode`.
        if (isMissing) {
            ts.Debug.assert(pos === errorNode.pos, "This failure could trigger https://github.com/Microsoft/TypeScript/issues/20809");
            ts.Debug.assert(pos === errorNode.end, "This failure could trigger https://github.com/Microsoft/TypeScript/issues/20809");
        }
        else {
            ts.Debug.assert(pos >= errorNode.pos, "This failure could trigger https://github.com/Microsoft/TypeScript/issues/20809");
            ts.Debug.assert(pos <= errorNode.end, "This failure could trigger https://github.com/Microsoft/TypeScript/issues/20809");
        }
        return ts.createTextSpanFromBounds(pos, errorNode.end);
    }
    ts.getErrorSpanForNode = getErrorSpanForNode;
    function isExternalOrCommonJsModule(file) {
        return (file.externalModuleIndicator || file.commonJsModuleIndicator) !== undefined;
    }
    ts.isExternalOrCommonJsModule = isExternalOrCommonJsModule;
    function isJsonSourceFile(file) {
        return file.scriptKind === 6 /* JSON */;
    }
    ts.isJsonSourceFile = isJsonSourceFile;
    function isConstEnumDeclaration(node) {
        return node.kind === 238 /* EnumDeclaration */ && isConst(node);
    }
    ts.isConstEnumDeclaration = isConstEnumDeclaration;
    function isConst(node) {
        return !!(ts.getCombinedNodeFlags(node) & 2 /* Const */)
            || !!(ts.getCombinedModifierFlags(node) & 2048 /* Const */);
    }
    ts.isConst = isConst;
    function isLet(node) {
        return !!(ts.getCombinedNodeFlags(node) & 1 /* Let */);
    }
    ts.isLet = isLet;
    function isSuperCall(n) {
        return n.kind === 187 /* CallExpression */ && n.expression.kind === 97 /* SuperKeyword */;
    }
    ts.isSuperCall = isSuperCall;
    function isImportCall(n) {
        return n.kind === 187 /* CallExpression */ && n.expression.kind === 91 /* ImportKeyword */;
    }
    ts.isImportCall = isImportCall;
    function isLiteralImportTypeNode(n) {
        return n.kind === 179 /* ImportType */ &&
            n.argument.kind === 178 /* LiteralType */ &&
            ts.isStringLiteral(n.argument.literal);
    }
    ts.isLiteralImportTypeNode = isLiteralImportTypeNode;
    function isPrologueDirective(node) {
        return node.kind === 216 /* ExpressionStatement */
            && node.expression.kind === 9 /* StringLiteral */;
    }
    ts.isPrologueDirective = isPrologueDirective;
    function getLeadingCommentRangesOfNode(node, sourceFileOfNode) {
        return node.kind !== 10 /* JsxText */ ? ts.getLeadingCommentRanges(sourceFileOfNode.text, node.pos) : undefined;
    }
    ts.getLeadingCommentRangesOfNode = getLeadingCommentRangesOfNode;
    function getJSDocCommentRanges(node, text) {
        var commentRanges = (node.kind === 149 /* Parameter */ ||
            node.kind === 148 /* TypeParameter */ ||
            node.kind === 192 /* FunctionExpression */ ||
            node.kind === 193 /* ArrowFunction */ ||
            node.kind === 191 /* ParenthesizedExpression */) ?
            ts.concatenate(ts.getTrailingCommentRanges(text, node.pos), ts.getLeadingCommentRanges(text, node.pos)) :
            ts.getLeadingCommentRanges(text, node.pos);
        // True if the comment starts with '/**' but not if it is '/**/'
        return ts.filter(commentRanges, function (comment) {
            return text.charCodeAt(comment.pos + 1) === 42 /* asterisk */ &&
                text.charCodeAt(comment.pos + 2) === 42 /* asterisk */ &&
                text.charCodeAt(comment.pos + 3) !== 47 /* slash */;
        });
    }
    ts.getJSDocCommentRanges = getJSDocCommentRanges;
    ts.fullTripleSlashReferencePathRegEx = /^(\/\/\/\s*<reference\s+path\s*=\s*)('|")(.+?)\2.*?\/>/;
    var fullTripleSlashReferenceTypeReferenceDirectiveRegEx = /^(\/\/\/\s*<reference\s+types\s*=\s*)('|")(.+?)\2.*?\/>/;
    ts.fullTripleSlashAMDReferencePathRegEx = /^(\/\/\/\s*<amd-dependency\s+path\s*=\s*)('|")(.+?)\2.*?\/>/;
    var defaultLibReferenceRegEx = /^(\/\/\/\s*<reference\s+no-default-lib\s*=\s*)('|")(.+?)\2\s*\/>/;
    function isPartOfTypeNode(node) {
        if (161 /* FirstTypeNode */ <= node.kind && node.kind <= 179 /* LastTypeNode */) {
            return true;
        }
        switch (node.kind) {
            case 119 /* AnyKeyword */:
            case 142 /* UnknownKeyword */:
            case 134 /* NumberKeyword */:
            case 137 /* StringKeyword */:
            case 122 /* BooleanKeyword */:
            case 138 /* SymbolKeyword */:
            case 140 /* UndefinedKeyword */:
            case 131 /* NeverKeyword */:
                return true;
            case 105 /* VoidKeyword */:
                return node.parent.kind !== 196 /* VoidExpression */;
            case 207 /* ExpressionWithTypeArguments */:
                return !isExpressionWithTypeArgumentsInClassExtendsClause(node);
            case 148 /* TypeParameter */:
                return node.parent.kind === 177 /* MappedType */ || node.parent.kind === 172 /* InferType */;
            // Identifiers and qualified names may be type nodes, depending on their context. Climb
            // above them to find the lowest container
            case 71 /* Identifier */:
                // If the identifier is the RHS of a qualified name, then it's a type iff its parent is.
                if (node.parent.kind === 146 /* QualifiedName */ && node.parent.right === node) {
                    node = node.parent;
                }
                else if (node.parent.kind === 185 /* PropertyAccessExpression */ && node.parent.name === node) {
                    node = node.parent;
                }
                // At this point, node is either a qualified name or an identifier
                ts.Debug.assert(node.kind === 71 /* Identifier */ || node.kind === 146 /* QualifiedName */ || node.kind === 185 /* PropertyAccessExpression */, "'node' was expected to be a qualified name, identifier or property access in 'isPartOfTypeNode'.");
            // falls through
            case 146 /* QualifiedName */:
            case 185 /* PropertyAccessExpression */:
            case 99 /* ThisKeyword */: {
                var parent = node.parent;
                if (parent.kind === 165 /* TypeQuery */) {
                    return false;
                }
                if (parent.kind === 179 /* ImportType */) {
                    return !parent.isTypeOf;
                }
                // Do not recursively call isPartOfTypeNode on the parent. In the example:
                //
                //     let a: A.B.C;
                //
                // Calling isPartOfTypeNode would consider the qualified name A.B a type node.
                // Only C and A.B.C are type nodes.
                if (161 /* FirstTypeNode */ <= parent.kind && parent.kind <= 179 /* LastTypeNode */) {
                    return true;
                }
                switch (parent.kind) {
                    case 207 /* ExpressionWithTypeArguments */:
                        return !isExpressionWithTypeArgumentsInClassExtendsClause(parent);
                    case 148 /* TypeParameter */:
                        return node === parent.constraint;
                    case 152 /* PropertyDeclaration */:
                    case 151 /* PropertySignature */:
                    case 149 /* Parameter */:
                    case 232 /* VariableDeclaration */:
                        return node === parent.type;
                    case 234 /* FunctionDeclaration */:
                    case 192 /* FunctionExpression */:
                    case 193 /* ArrowFunction */:
                    case 155 /* Constructor */:
                    case 154 /* MethodDeclaration */:
                    case 153 /* MethodSignature */:
                    case 156 /* GetAccessor */:
                    case 157 /* SetAccessor */:
                        return node === parent.type;
                    case 158 /* CallSignature */:
                    case 159 /* ConstructSignature */:
                    case 160 /* IndexSignature */:
                        return node === parent.type;
                    case 190 /* TypeAssertionExpression */:
                        return node === parent.type;
                    case 187 /* CallExpression */:
                    case 188 /* NewExpression */:
                        return ts.contains(parent.typeArguments, node);
                    case 189 /* TaggedTemplateExpression */:
                        // TODO (drosen): TaggedTemplateExpressions may eventually support type arguments.
                        return false;
                }
            }
        }
        return false;
    }
    ts.isPartOfTypeNode = isPartOfTypeNode;
    function isChildOfNodeWithKind(node, kind) {
        while (node) {
            if (node.kind === kind) {
                return true;
            }
            node = node.parent;
        }
        return false;
    }
    ts.isChildOfNodeWithKind = isChildOfNodeWithKind;
    // Warning: This has the same semantics as the forEach family of functions,
    //          in that traversal terminates in the event that 'visitor' supplies a truthy value.
    function forEachReturnStatement(body, visitor) {
        return traverse(body);
        function traverse(node) {
            switch (node.kind) {
                case 225 /* ReturnStatement */:
                    return visitor(node);
                case 241 /* CaseBlock */:
                case 213 /* Block */:
                case 217 /* IfStatement */:
                case 218 /* DoStatement */:
                case 219 /* WhileStatement */:
                case 220 /* ForStatement */:
                case 221 /* ForInStatement */:
                case 222 /* ForOfStatement */:
                case 226 /* WithStatement */:
                case 227 /* SwitchStatement */:
                case 266 /* CaseClause */:
                case 267 /* DefaultClause */:
                case 228 /* LabeledStatement */:
                case 230 /* TryStatement */:
                case 269 /* CatchClause */:
                    return ts.forEachChild(node, traverse);
            }
        }
    }
    ts.forEachReturnStatement = forEachReturnStatement;
    function forEachYieldExpression(body, visitor) {
        return traverse(body);
        function traverse(node) {
            switch (node.kind) {
                case 203 /* YieldExpression */:
                    visitor(node);
                    var operand = node.expression;
                    if (operand) {
                        traverse(operand);
                    }
                    return;
                case 238 /* EnumDeclaration */:
                case 236 /* InterfaceDeclaration */:
                case 239 /* ModuleDeclaration */:
                case 237 /* TypeAliasDeclaration */:
                case 235 /* ClassDeclaration */:
                case 205 /* ClassExpression */:
                    // These are not allowed inside a generator now, but eventually they may be allowed
                    // as local types. Regardless, any yield statements contained within them should be
                    // skipped in this traversal.
                    return;
                default:
                    if (ts.isFunctionLike(node)) {
                        if (node.name && node.name.kind === 147 /* ComputedPropertyName */) {
                            // Note that we will not include methods/accessors of a class because they would require
                            // first descending into the class. This is by design.
                            traverse(node.name.expression);
                            return;
                        }
                    }
                    else if (!isPartOfTypeNode(node)) {
                        // This is the general case, which should include mostly expressions and statements.
                        // Also includes NodeArrays.
                        ts.forEachChild(node, traverse);
                    }
            }
        }
    }
    ts.forEachYieldExpression = forEachYieldExpression;
    /**
     * Gets the most likely element type for a TypeNode. This is not an exhaustive test
     * as it assumes a rest argument can only be an array type (either T[], or Array<T>).
     *
     * @param node The type node.
     */
    function getRestParameterElementType(node) {
        if (node && node.kind === 167 /* ArrayType */) {
            return node.elementType;
        }
        else if (node && node.kind === 162 /* TypeReference */) {
            return ts.singleOrUndefined(node.typeArguments);
        }
        else {
            return undefined;
        }
    }
    ts.getRestParameterElementType = getRestParameterElementType;
    function getMembersOfDeclaration(node) {
        switch (node.kind) {
            case 236 /* InterfaceDeclaration */:
            case 235 /* ClassDeclaration */:
            case 205 /* ClassExpression */:
            case 166 /* TypeLiteral */:
                return node.members;
            case 184 /* ObjectLiteralExpression */:
                return node.properties;
        }
    }
    ts.getMembersOfDeclaration = getMembersOfDeclaration;
    function isVariableLike(node) {
        if (node) {
            switch (node.kind) {
                case 182 /* BindingElement */:
                case 273 /* EnumMember */:
                case 149 /* Parameter */:
                case 270 /* PropertyAssignment */:
                case 152 /* PropertyDeclaration */:
                case 151 /* PropertySignature */:
                case 271 /* ShorthandPropertyAssignment */:
                case 232 /* VariableDeclaration */:
                    return true;
            }
        }
        return false;
    }
    ts.isVariableLike = isVariableLike;
    function isVariableLikeOrAccessor(node) {
        return isVariableLike(node) || ts.isAccessor(node);
    }
    ts.isVariableLikeOrAccessor = isVariableLikeOrAccessor;
    function isVariableDeclarationInVariableStatement(node) {
        return node.parent.kind === 233 /* VariableDeclarationList */
            && node.parent.parent.kind === 214 /* VariableStatement */;
    }
    ts.isVariableDeclarationInVariableStatement = isVariableDeclarationInVariableStatement;
    function isValidESSymbolDeclaration(node) {
        return ts.isVariableDeclaration(node) ? isConst(node) && ts.isIdentifier(node.name) && isVariableDeclarationInVariableStatement(node) :
            ts.isPropertyDeclaration(node) ? hasReadonlyModifier(node) && hasStaticModifier(node) :
                ts.isPropertySignature(node) && hasReadonlyModifier(node);
    }
    ts.isValidESSymbolDeclaration = isValidESSymbolDeclaration;
    function introducesArgumentsExoticObject(node) {
        switch (node.kind) {
            case 154 /* MethodDeclaration */:
            case 153 /* MethodSignature */:
            case 155 /* Constructor */:
            case 156 /* GetAccessor */:
            case 157 /* SetAccessor */:
            case 234 /* FunctionDeclaration */:
            case 192 /* FunctionExpression */:
                return true;
        }
        return false;
    }
    ts.introducesArgumentsExoticObject = introducesArgumentsExoticObject;
    function unwrapInnermostStatementOfLabel(node, beforeUnwrapLabelCallback) {
        while (true) {
            if (beforeUnwrapLabelCallback) {
                beforeUnwrapLabelCallback(node);
            }
            if (node.statement.kind !== 228 /* LabeledStatement */) {
                return node.statement;
            }
            node = node.statement;
        }
    }
    ts.unwrapInnermostStatementOfLabel = unwrapInnermostStatementOfLabel;
    function isFunctionBlock(node) {
        return node && node.kind === 213 /* Block */ && ts.isFunctionLike(node.parent);
    }
    ts.isFunctionBlock = isFunctionBlock;
    function isObjectLiteralMethod(node) {
        return node && node.kind === 154 /* MethodDeclaration */ && node.parent.kind === 184 /* ObjectLiteralExpression */;
    }
    ts.isObjectLiteralMethod = isObjectLiteralMethod;
    function isObjectLiteralOrClassExpressionMethod(node) {
        return node.kind === 154 /* MethodDeclaration */ &&
            (node.parent.kind === 184 /* ObjectLiteralExpression */ ||
                node.parent.kind === 205 /* ClassExpression */);
    }
    ts.isObjectLiteralOrClassExpressionMethod = isObjectLiteralOrClassExpressionMethod;
    function isIdentifierTypePredicate(predicate) {
        return predicate && predicate.kind === 1 /* Identifier */;
    }
    ts.isIdentifierTypePredicate = isIdentifierTypePredicate;
    function isThisTypePredicate(predicate) {
        return predicate && predicate.kind === 0 /* This */;
    }
    ts.isThisTypePredicate = isThisTypePredicate;
    function getPropertyAssignment(objectLiteral, key, key2) {
        return objectLiteral.properties.filter(function (property) {
            if (property.kind === 270 /* PropertyAssignment */) {
                var propName = getTextOfPropertyName(property.name);
                return key === propName || (!!key2 && key2 === propName);
            }
            return false;
        });
    }
    ts.getPropertyAssignment = getPropertyAssignment;
    function getTsConfigObjectLiteralExpression(tsConfigSourceFile) {
        if (tsConfigSourceFile && tsConfigSourceFile.statements.length) {
            var expression = tsConfigSourceFile.statements[0].expression;
            return ts.tryCast(expression, ts.isObjectLiteralExpression);
        }
    }
    ts.getTsConfigObjectLiteralExpression = getTsConfigObjectLiteralExpression;
    function getTsConfigPropArrayElementValue(tsConfigSourceFile, propKey, elementValue) {
        return ts.firstDefined(getTsConfigPropArray(tsConfigSourceFile, propKey), function (property) {
            return ts.isArrayLiteralExpression(property.initializer) ?
                ts.find(property.initializer.elements, function (element) { return ts.isStringLiteral(element) && element.text === elementValue; }) :
                undefined;
        });
    }
    ts.getTsConfigPropArrayElementValue = getTsConfigPropArrayElementValue;
    function getTsConfigPropArray(tsConfigSourceFile, propKey) {
        var jsonObjectLiteral = getTsConfigObjectLiteralExpression(tsConfigSourceFile);
        return jsonObjectLiteral ? getPropertyAssignment(jsonObjectLiteral, propKey) : ts.emptyArray;
    }
    ts.getTsConfigPropArray = getTsConfigPropArray;
    function getContainingFunction(node) {
        return findAncestor(node.parent, ts.isFunctionLike);
    }
    ts.getContainingFunction = getContainingFunction;
    function getContainingClass(node) {
        return findAncestor(node.parent, ts.isClassLike);
    }
    ts.getContainingClass = getContainingClass;
    function getThisContainer(node, includeArrowFunctions) {
        ts.Debug.assert(node.kind !== 274 /* SourceFile */);
        while (true) {
            node = node.parent;
            if (!node) {
                return ts.Debug.fail(); // If we never pass in a SourceFile, this should be unreachable, since we'll stop when we reach that.
            }
            switch (node.kind) {
                case 147 /* ComputedPropertyName */:
                    // If the grandparent node is an object literal (as opposed to a class),
                    // then the computed property is not a 'this' container.
                    // A computed property name in a class needs to be a this container
                    // so that we can error on it.
                    if (ts.isClassLike(node.parent.parent)) {
                        return node;
                    }
                    // If this is a computed property, then the parent should not
                    // make it a this container. The parent might be a property
                    // in an object literal, like a method or accessor. But in order for
                    // such a parent to be a this container, the reference must be in
                    // the *body* of the container.
                    node = node.parent;
                    break;
                case 150 /* Decorator */:
                    // Decorators are always applied outside of the body of a class or method.
                    if (node.parent.kind === 149 /* Parameter */ && ts.isClassElement(node.parent.parent)) {
                        // If the decorator's parent is a Parameter, we resolve the this container from
                        // the grandparent class declaration.
                        node = node.parent.parent;
                    }
                    else if (ts.isClassElement(node.parent)) {
                        // If the decorator's parent is a class element, we resolve the 'this' container
                        // from the parent class declaration.
                        node = node.parent;
                    }
                    break;
                case 193 /* ArrowFunction */:
                    if (!includeArrowFunctions) {
                        continue;
                    }
                // falls through
                case 234 /* FunctionDeclaration */:
                case 192 /* FunctionExpression */:
                case 239 /* ModuleDeclaration */:
                case 152 /* PropertyDeclaration */:
                case 151 /* PropertySignature */:
                case 154 /* MethodDeclaration */:
                case 153 /* MethodSignature */:
                case 155 /* Constructor */:
                case 156 /* GetAccessor */:
                case 157 /* SetAccessor */:
                case 158 /* CallSignature */:
                case 159 /* ConstructSignature */:
                case 160 /* IndexSignature */:
                case 238 /* EnumDeclaration */:
                case 274 /* SourceFile */:
                    return node;
            }
        }
    }
    ts.getThisContainer = getThisContainer;
    function getNewTargetContainer(node) {
        var container = getThisContainer(node, /*includeArrowFunctions*/ false);
        if (container) {
            switch (container.kind) {
                case 155 /* Constructor */:
                case 234 /* FunctionDeclaration */:
                case 192 /* FunctionExpression */:
                    return container;
            }
        }
        return undefined;
    }
    ts.getNewTargetContainer = getNewTargetContainer;
    /**
     * Given an super call/property node, returns the closest node where
     * - a super call/property access is legal in the node and not legal in the parent node the node.
     *   i.e. super call is legal in constructor but not legal in the class body.
     * - the container is an arrow function (so caller might need to call getSuperContainer again in case it needs to climb higher)
     * - a super call/property is definitely illegal in the container (but might be legal in some subnode)
     *   i.e. super property access is illegal in function declaration but can be legal in the statement list
     */
    function getSuperContainer(node, stopOnFunctions) {
        while (true) {
            node = node.parent;
            if (!node) {
                return node;
            }
            switch (node.kind) {
                case 147 /* ComputedPropertyName */:
                    node = node.parent;
                    break;
                case 234 /* FunctionDeclaration */:
                case 192 /* FunctionExpression */:
                case 193 /* ArrowFunction */:
                    if (!stopOnFunctions) {
                        continue;
                    }
                // falls through
                case 152 /* PropertyDeclaration */:
                case 151 /* PropertySignature */:
                case 154 /* MethodDeclaration */:
                case 153 /* MethodSignature */:
                case 155 /* Constructor */:
                case 156 /* GetAccessor */:
                case 157 /* SetAccessor */:
                    return node;
                case 150 /* Decorator */:
                    // Decorators are always applied outside of the body of a class or method.
                    if (node.parent.kind === 149 /* Parameter */ && ts.isClassElement(node.parent.parent)) {
                        // If the decorator's parent is a Parameter, we resolve the this container from
                        // the grandparent class declaration.
                        node = node.parent.parent;
                    }
                    else if (ts.isClassElement(node.parent)) {
                        // If the decorator's parent is a class element, we resolve the 'this' container
                        // from the parent class declaration.
                        node = node.parent;
                    }
                    break;
            }
        }
    }
    ts.getSuperContainer = getSuperContainer;
    function getImmediatelyInvokedFunctionExpression(func) {
        if (func.kind === 192 /* FunctionExpression */ || func.kind === 193 /* ArrowFunction */) {
            var prev = func;
            var parent = func.parent;
            while (parent.kind === 191 /* ParenthesizedExpression */) {
                prev = parent;
                parent = parent.parent;
            }
            if (parent.kind === 187 /* CallExpression */ && parent.expression === prev) {
                return parent;
            }
        }
    }
    ts.getImmediatelyInvokedFunctionExpression = getImmediatelyInvokedFunctionExpression;
    /**
     * Determines whether a node is a property or element access expression for `super`.
     */
    function isSuperProperty(node) {
        var kind = node.kind;
        return (kind === 185 /* PropertyAccessExpression */ || kind === 186 /* ElementAccessExpression */)
            && node.expression.kind === 97 /* SuperKeyword */;
    }
    ts.isSuperProperty = isSuperProperty;
    /**
     * Determines whether a node is a property or element access expression for `this`.
     */
    function isThisProperty(node) {
        var kind = node.kind;
        return (kind === 185 /* PropertyAccessExpression */ || kind === 186 /* ElementAccessExpression */)
            && node.expression.kind === 99 /* ThisKeyword */;
    }
    ts.isThisProperty = isThisProperty;
    function getEntityNameFromTypeNode(node) {
        switch (node.kind) {
            case 162 /* TypeReference */:
                return node.typeName;
            case 207 /* ExpressionWithTypeArguments */:
                return isEntityNameExpression(node.expression)
                    ? node.expression
                    : undefined;
            case 71 /* Identifier */:
            case 146 /* QualifiedName */:
                return node;
        }
        return undefined;
    }
    ts.getEntityNameFromTypeNode = getEntityNameFromTypeNode;
    function getInvokedExpression(node) {
        switch (node.kind) {
            case 189 /* TaggedTemplateExpression */:
                return node.tag;
            case 257 /* JsxOpeningElement */:
            case 256 /* JsxSelfClosingElement */:
                return node.tagName;
            default:
                return node.expression;
        }
    }
    ts.getInvokedExpression = getInvokedExpression;
    function nodeCanBeDecorated(node, parent, grandparent) {
        switch (node.kind) {
            case 235 /* ClassDeclaration */:
                // classes are valid targets
                return true;
            case 152 /* PropertyDeclaration */:
                // property declarations are valid if their parent is a class declaration.
                return parent.kind === 235 /* ClassDeclaration */;
            case 156 /* GetAccessor */:
            case 157 /* SetAccessor */:
            case 154 /* MethodDeclaration */:
                // if this method has a body and its parent is a class declaration, this is a valid target.
                return node.body !== undefined
                    && parent.kind === 235 /* ClassDeclaration */;
            case 149 /* Parameter */:
                // if the parameter's parent has a body and its grandparent is a class declaration, this is a valid target;
                return parent.body !== undefined
                    && (parent.kind === 155 /* Constructor */
                        || parent.kind === 154 /* MethodDeclaration */
                        || parent.kind === 157 /* SetAccessor */)
                    && grandparent.kind === 235 /* ClassDeclaration */;
        }
        return false;
    }
    ts.nodeCanBeDecorated = nodeCanBeDecorated;
    function nodeIsDecorated(node, parent, grandparent) {
        return node.decorators !== undefined
            && nodeCanBeDecorated(node, parent, grandparent); // TODO: GH#18217
    }
    ts.nodeIsDecorated = nodeIsDecorated;
    function nodeOrChildIsDecorated(node, parent, grandparent) {
        return nodeIsDecorated(node, parent, grandparent) || childIsDecorated(node, parent); // TODO: GH#18217
    }
    ts.nodeOrChildIsDecorated = nodeOrChildIsDecorated;
    function childIsDecorated(node, parent) {
        switch (node.kind) {
            case 235 /* ClassDeclaration */:
                return ts.some(node.members, function (m) { return nodeOrChildIsDecorated(m, node, parent); }); // TODO: GH#18217
            case 154 /* MethodDeclaration */:
            case 157 /* SetAccessor */:
                return ts.some(node.parameters, function (p) { return nodeIsDecorated(p, node, parent); }); // TODO: GH#18217
            default:
                return false;
        }
    }
    ts.childIsDecorated = childIsDecorated;
    function isJSXTagName(node) {
        var parent = node.parent;
        if (parent.kind === 257 /* JsxOpeningElement */ ||
            parent.kind === 256 /* JsxSelfClosingElement */ ||
            parent.kind === 258 /* JsxClosingElement */) {
            return parent.tagName === node;
        }
        return false;
    }
    ts.isJSXTagName = isJSXTagName;
    function isExpressionNode(node) {
        switch (node.kind) {
            case 97 /* SuperKeyword */:
            case 95 /* NullKeyword */:
            case 101 /* TrueKeyword */:
            case 86 /* FalseKeyword */:
            case 12 /* RegularExpressionLiteral */:
            case 183 /* ArrayLiteralExpression */:
            case 184 /* ObjectLiteralExpression */:
            case 185 /* PropertyAccessExpression */:
            case 186 /* ElementAccessExpression */:
            case 187 /* CallExpression */:
            case 188 /* NewExpression */:
            case 189 /* TaggedTemplateExpression */:
            case 208 /* AsExpression */:
            case 190 /* TypeAssertionExpression */:
            case 209 /* NonNullExpression */:
            case 191 /* ParenthesizedExpression */:
            case 192 /* FunctionExpression */:
            case 205 /* ClassExpression */:
            case 193 /* ArrowFunction */:
            case 196 /* VoidExpression */:
            case 194 /* DeleteExpression */:
            case 195 /* TypeOfExpression */:
            case 198 /* PrefixUnaryExpression */:
            case 199 /* PostfixUnaryExpression */:
            case 200 /* BinaryExpression */:
            case 201 /* ConditionalExpression */:
            case 204 /* SpreadElement */:
            case 202 /* TemplateExpression */:
            case 13 /* NoSubstitutionTemplateLiteral */:
            case 206 /* OmittedExpression */:
            case 255 /* JsxElement */:
            case 256 /* JsxSelfClosingElement */:
            case 259 /* JsxFragment */:
            case 203 /* YieldExpression */:
            case 197 /* AwaitExpression */:
            case 210 /* MetaProperty */:
                return true;
            case 146 /* QualifiedName */:
                while (node.parent.kind === 146 /* QualifiedName */) {
                    node = node.parent;
                }
                return node.parent.kind === 165 /* TypeQuery */ || isJSXTagName(node);
            case 71 /* Identifier */:
                if (node.parent.kind === 165 /* TypeQuery */ || isJSXTagName(node)) {
                    return true;
                }
            // falls through
            case 8 /* NumericLiteral */:
            case 9 /* StringLiteral */:
            case 99 /* ThisKeyword */:
                return isInExpressionContext(node);
            default:
                return false;
        }
    }
    ts.isExpressionNode = isExpressionNode;
    function isInExpressionContext(node) {
        var parent = node.parent;
        switch (parent.kind) {
            case 232 /* VariableDeclaration */:
            case 149 /* Parameter */:
            case 152 /* PropertyDeclaration */:
            case 151 /* PropertySignature */:
            case 273 /* EnumMember */:
            case 270 /* PropertyAssignment */:
            case 182 /* BindingElement */:
                return parent.initializer === node;
            case 216 /* ExpressionStatement */:
            case 217 /* IfStatement */:
            case 218 /* DoStatement */:
            case 219 /* WhileStatement */:
            case 225 /* ReturnStatement */:
            case 226 /* WithStatement */:
            case 227 /* SwitchStatement */:
            case 266 /* CaseClause */:
            case 229 /* ThrowStatement */:
                return parent.expression === node;
            case 220 /* ForStatement */:
                var forStatement = parent;
                return (forStatement.initializer === node && forStatement.initializer.kind !== 233 /* VariableDeclarationList */) ||
                    forStatement.condition === node ||
                    forStatement.incrementor === node;
            case 221 /* ForInStatement */:
            case 222 /* ForOfStatement */:
                var forInStatement = parent;
                return (forInStatement.initializer === node && forInStatement.initializer.kind !== 233 /* VariableDeclarationList */) ||
                    forInStatement.expression === node;
            case 190 /* TypeAssertionExpression */:
            case 208 /* AsExpression */:
                return node === parent.expression;
            case 211 /* TemplateSpan */:
                return node === parent.expression;
            case 147 /* ComputedPropertyName */:
                return node === parent.expression;
            case 150 /* Decorator */:
            case 265 /* JsxExpression */:
            case 264 /* JsxSpreadAttribute */:
            case 272 /* SpreadAssignment */:
                return true;
            case 207 /* ExpressionWithTypeArguments */:
                return parent.expression === node && isExpressionWithTypeArgumentsInClassExtendsClause(parent);
            default:
                return isExpressionNode(parent);
        }
    }
    ts.isInExpressionContext = isInExpressionContext;
    function isExternalModuleImportEqualsDeclaration(node) {
        return node.kind === 243 /* ImportEqualsDeclaration */ && node.moduleReference.kind === 254 /* ExternalModuleReference */;
    }
    ts.isExternalModuleImportEqualsDeclaration = isExternalModuleImportEqualsDeclaration;
    function getExternalModuleImportEqualsDeclarationExpression(node) {
        ts.Debug.assert(isExternalModuleImportEqualsDeclaration(node));
        return node.moduleReference.expression;
    }
    ts.getExternalModuleImportEqualsDeclarationExpression = getExternalModuleImportEqualsDeclarationExpression;
    function isInternalModuleImportEqualsDeclaration(node) {
        return node.kind === 243 /* ImportEqualsDeclaration */ && node.moduleReference.kind !== 254 /* ExternalModuleReference */;
    }
    ts.isInternalModuleImportEqualsDeclaration = isInternalModuleImportEqualsDeclaration;
    function isSourceFileJavaScript(file) {
        return isInJavaScriptFile(file);
    }
    ts.isSourceFileJavaScript = isSourceFileJavaScript;
    function isSourceFileNotJavaScript(file) {
        return !isInJavaScriptFile(file);
    }
    ts.isSourceFileNotJavaScript = isSourceFileNotJavaScript;
    function isInJavaScriptFile(node) {
        return !!node && !!(node.flags & 65536 /* JavaScriptFile */);
    }
    ts.isInJavaScriptFile = isInJavaScriptFile;
    function isInJsonFile(node) {
        return !!node && !!(node.flags & 16777216 /* JsonFile */);
    }
    ts.isInJsonFile = isInJsonFile;
    function isInJSDoc(node) {
        return !!node && !!(node.flags & 2097152 /* JSDoc */);
    }
    ts.isInJSDoc = isInJSDoc;
    function isJSDocIndexSignature(node) {
        return ts.isTypeReferenceNode(node) &&
            ts.isIdentifier(node.typeName) &&
            node.typeName.escapedText === "Object" &&
            node.typeArguments && node.typeArguments.length === 2 &&
            (node.typeArguments[0].kind === 137 /* StringKeyword */ || node.typeArguments[0].kind === 134 /* NumberKeyword */);
    }
    ts.isJSDocIndexSignature = isJSDocIndexSignature;
    function isRequireCall(callExpression, checkArgumentIsStringLiteralLike) {
        if (callExpression.kind !== 187 /* CallExpression */) {
            return false;
        }
        var _a = callExpression, expression = _a.expression, args = _a.arguments;
        if (expression.kind !== 71 /* Identifier */ || expression.escapedText !== "require") {
            return false;
        }
        if (args.length !== 1) {
            return false;
        }
        var arg = args[0];
        return !checkArgumentIsStringLiteralLike || ts.isStringLiteralLike(arg);
    }
    ts.isRequireCall = isRequireCall;
    function isSingleOrDoubleQuote(charCode) {
        return charCode === 39 /* singleQuote */ || charCode === 34 /* doubleQuote */;
    }
    ts.isSingleOrDoubleQuote = isSingleOrDoubleQuote;
    function isStringDoubleQuoted(str, sourceFile) {
        return getSourceTextOfNodeFromSourceFile(sourceFile, str).charCodeAt(0) === 34 /* doubleQuote */;
    }
    ts.isStringDoubleQuoted = isStringDoubleQuoted;
    function getDeclarationOfJSInitializer(node) {
        if (!isInJavaScriptFile(node) || !node.parent) {
            return undefined;
        }
        var name;
        var decl;
        if (ts.isVariableDeclaration(node.parent) && node.parent.initializer === node) {
            name = node.parent.name;
            decl = node.parent;
        }
        else if (ts.isBinaryExpression(node.parent) && node.parent.operatorToken.kind === 58 /* EqualsToken */ && node.parent.right === node) {
            name = node.parent.left;
            decl = name;
        }
        else if (ts.isBinaryExpression(node.parent) && node.parent.operatorToken.kind === 54 /* BarBarToken */) {
            if (ts.isVariableDeclaration(node.parent.parent) && node.parent.parent.initializer === node.parent) {
                name = node.parent.parent.name;
                decl = node.parent.parent;
            }
            else if (ts.isBinaryExpression(node.parent.parent) && node.parent.parent.operatorToken.kind === 58 /* EqualsToken */ && node.parent.parent.right === node.parent) {
                name = node.parent.parent.left;
                decl = name;
            }
            if (!name || !isEntityNameExpression(name) || !isSameEntityName(name, node.parent.left)) {
                return undefined;
            }
        }
        if (!name || !getJavascriptInitializer(node, isPrototypeAccess(name))) {
            return undefined;
        }
        return decl;
    }
    ts.getDeclarationOfJSInitializer = getDeclarationOfJSInitializer;
    /** Get the initializer, taking into account defaulted Javascript initializers */
    function getEffectiveInitializer(node) {
        if (isInJavaScriptFile(node) && node.initializer &&
            ts.isBinaryExpression(node.initializer) && node.initializer.operatorToken.kind === 54 /* BarBarToken */ &&
            node.name && isEntityNameExpression(node.name) && isSameEntityName(node.name, node.initializer.left)) {
            return node.initializer.right;
        }
        return node.initializer;
    }
    ts.getEffectiveInitializer = getEffectiveInitializer;
    /**
     * Get the assignment 'initializer' -- the righthand side-- when the initializer is container-like (See getJavascriptInitializer).
     * We treat the right hand side of assignments with container-like initalizers as declarations.
     */
    function getAssignedJavascriptInitializer(node) {
        if (node && node.parent && ts.isBinaryExpression(node.parent) && node.parent.operatorToken.kind === 58 /* EqualsToken */) {
            var isPrototypeAssignment = isPrototypeAccess(node.parent.left);
            return getJavascriptInitializer(node.parent.right, isPrototypeAssignment) ||
                getDefaultedJavascriptInitializer(node.parent.left, node.parent.right, isPrototypeAssignment);
        }
    }
    ts.getAssignedJavascriptInitializer = getAssignedJavascriptInitializer;
    /**
     * Recognized Javascript container-like initializers are:
     * 1. (function() {})() -- IIFEs
     * 2. function() { } -- Function expressions
     * 3. class { } -- Class expressions
     * 4. {} -- Empty object literals
     * 5. { ... } -- Non-empty object literals, when used to initialize a prototype, like `C.prototype = { m() { } }`
     *
     * This function returns the provided initializer, or undefined if it is not valid.
     */
    function getJavascriptInitializer(initializer, isPrototypeAssignment) {
        if (ts.isCallExpression(initializer)) {
            var e = skipParentheses(initializer.expression);
            return e.kind === 192 /* FunctionExpression */ || e.kind === 193 /* ArrowFunction */ ? initializer : undefined;
        }
        if (initializer.kind === 192 /* FunctionExpression */ ||
            initializer.kind === 205 /* ClassExpression */ ||
            initializer.kind === 193 /* ArrowFunction */) {
            return initializer;
        }
        if (ts.isObjectLiteralExpression(initializer) && (initializer.properties.length === 0 || isPrototypeAssignment)) {
            return initializer;
        }
    }
    ts.getJavascriptInitializer = getJavascriptInitializer;
    /**
     * A defaulted Javascript initializer matches the pattern
     * `Lhs = Lhs || JavascriptInitializer`
     * or `var Lhs = Lhs || JavascriptInitializer`
     *
     * The second Lhs is required to be the same as the first except that it may be prefixed with
     * 'window.', 'global.' or 'self.' The second Lhs is otherwise ignored by the binder and checker.
     */
    function getDefaultedJavascriptInitializer(name, initializer, isPrototypeAssignment) {
        var e = ts.isBinaryExpression(initializer) && initializer.operatorToken.kind === 54 /* BarBarToken */ && getJavascriptInitializer(initializer.right, isPrototypeAssignment);
        if (e && isSameEntityName(name, initializer.left)) {
            return e;
        }
    }
    function isDefaultedJavascriptInitializer(node) {
        var name = ts.isVariableDeclaration(node.parent) ? node.parent.name :
            ts.isBinaryExpression(node.parent) && node.parent.operatorToken.kind === 58 /* EqualsToken */ ? node.parent.left :
                undefined;
        return name && getJavascriptInitializer(node.right, isPrototypeAccess(name)) && isEntityNameExpression(name) && isSameEntityName(name, node.left);
    }
    ts.isDefaultedJavascriptInitializer = isDefaultedJavascriptInitializer;
    /** Given a Javascript initializer, return the outer name. That is, the lhs of the assignment or the declaration name. */
    function getOuterNameOfJsInitializer(node) {
        if (ts.isBinaryExpression(node.parent)) {
            var parent = (node.parent.operatorToken.kind === 54 /* BarBarToken */ && ts.isBinaryExpression(node.parent.parent)) ? node.parent.parent : node.parent;
            if (parent.operatorToken.kind === 58 /* EqualsToken */ && ts.isIdentifier(parent.left)) {
                return parent.left;
            }
        }
        else if (ts.isVariableDeclaration(node.parent)) {
            return node.parent.name;
        }
    }
    ts.getOuterNameOfJsInitializer = getOuterNameOfJsInitializer;
    /**
     * Is the 'declared' name the same as the one in the initializer?
     * @return true for identical entity names, as well as ones where the initializer is prefixed with
     * 'window', 'self' or 'global'. For example:
     *
     * var my = my || {}
     * var min = window.min || {}
     * my.app = self.my.app || class { }
     */
    function isSameEntityName(name, initializer) {
        if (ts.isIdentifier(name) && ts.isIdentifier(initializer)) {
            return name.escapedText === initializer.escapedText;
        }
        if (ts.isIdentifier(name) && ts.isPropertyAccessExpression(initializer)) {
            return (initializer.expression.kind === 99 /* ThisKeyword */ ||
                ts.isIdentifier(initializer.expression) &&
                    (initializer.expression.escapedText === "window" ||
                        initializer.expression.escapedText === "self" ||
                        initializer.expression.escapedText === "global")) &&
                isSameEntityName(name, initializer.name);
        }
        if (ts.isPropertyAccessExpression(name) && ts.isPropertyAccessExpression(initializer)) {
            return name.name.escapedText === initializer.name.escapedText && isSameEntityName(name.expression, initializer.expression);
        }
        return false;
    }
    function getRightMostAssignedExpression(node) {
        while (isAssignmentExpression(node, /*excludeCompoundAssignements*/ true)) {
            node = node.right;
        }
        return node;
    }
    ts.getRightMostAssignedExpression = getRightMostAssignedExpression;
    function isExportsIdentifier(node) {
        return ts.isIdentifier(node) && node.escapedText === "exports";
    }
    ts.isExportsIdentifier = isExportsIdentifier;
    function isModuleExportsPropertyAccessExpression(node) {
        return ts.isPropertyAccessExpression(node) && ts.isIdentifier(node.expression) && node.expression.escapedText === "module" && node.name.escapedText === "exports";
    }
    ts.isModuleExportsPropertyAccessExpression = isModuleExportsPropertyAccessExpression;
    /// Given a BinaryExpression, returns SpecialPropertyAssignmentKind for the various kinds of property
    /// assignments we treat as special in the binder
    function getSpecialPropertyAssignmentKind(expr) {
        if (!isInJavaScriptFile(expr) ||
            expr.operatorToken.kind !== 58 /* EqualsToken */ ||
            !ts.isPropertyAccessExpression(expr.left)) {
            return 0 /* None */;
        }
        var lhs = expr.left;
        if (lhs.expression.kind === 99 /* ThisKeyword */) {
            return 4 /* ThisProperty */;
        }
        else if (ts.isIdentifier(lhs.expression) && lhs.expression.escapedText === "module" && lhs.name.escapedText === "exports") {
            // module.exports = expr
            return 2 /* ModuleExports */;
        }
        else if (isEntityNameExpression(lhs.expression)) {
            if (lhs.name.escapedText === "prototype" && ts.isObjectLiteralExpression(getInitializerOfBinaryExpression(expr))) {
                // F.prototype = { ... }
                return 6 /* Prototype */;
            }
            else if (isPrototypeAccess(lhs.expression)) {
                // F.G....prototype.x = expr
                return 3 /* PrototypeProperty */;
            }
            var nextToLast = lhs;
            while (ts.isPropertyAccessExpression(nextToLast.expression)) {
                nextToLast = nextToLast.expression;
            }
            ts.Debug.assert(ts.isIdentifier(nextToLast.expression));
            var id = nextToLast.expression;
            if (id.escapedText === "exports" ||
                id.escapedText === "module" && nextToLast.name.escapedText === "exports") {
                // exports.name = expr OR module.exports.name = expr
                return 1 /* ExportsProperty */;
            }
            // F.G...x = expr
            return 5 /* Property */;
        }
        return 0 /* None */;
    }
    ts.getSpecialPropertyAssignmentKind = getSpecialPropertyAssignmentKind;
    function getInitializerOfBinaryExpression(expr) {
        while (ts.isBinaryExpression(expr.right)) {
            expr = expr.right;
        }
        return expr.right;
    }
    ts.getInitializerOfBinaryExpression = getInitializerOfBinaryExpression;
    function isPrototypePropertyAssignment(node) {
        return ts.isBinaryExpression(node) && getSpecialPropertyAssignmentKind(node) === 3 /* PrototypeProperty */;
    }
    ts.isPrototypePropertyAssignment = isPrototypePropertyAssignment;
    function isSpecialPropertyDeclaration(expr) {
        return isInJavaScriptFile(expr) &&
            expr.parent && expr.parent.kind === 216 /* ExpressionStatement */ &&
            !!ts.getJSDocTypeTag(expr.parent);
    }
    ts.isSpecialPropertyDeclaration = isSpecialPropertyDeclaration;
    function importFromModuleSpecifier(node) {
        return tryGetImportFromModuleSpecifier(node) || ts.Debug.fail(ts.Debug.showSyntaxKind(node.parent));
    }
    ts.importFromModuleSpecifier = importFromModuleSpecifier;
    function tryGetImportFromModuleSpecifier(node) {
        switch (node.parent.kind) {
            case 244 /* ImportDeclaration */:
            case 250 /* ExportDeclaration */:
                return node.parent;
            case 254 /* ExternalModuleReference */:
                return node.parent.parent;
            case 187 /* CallExpression */:
                return node.parent;
            case 178 /* LiteralType */:
                ts.Debug.assert(ts.isStringLiteral(node));
                return ts.tryCast(node.parent.parent, ts.isImportTypeNode);
            default:
                return undefined;
        }
    }
    ts.tryGetImportFromModuleSpecifier = tryGetImportFromModuleSpecifier;
    function getExternalModuleName(node) {
        switch (node.kind) {
            case 244 /* ImportDeclaration */:
            case 250 /* ExportDeclaration */:
                return node.moduleSpecifier;
            case 243 /* ImportEqualsDeclaration */:
                return node.moduleReference.kind === 254 /* ExternalModuleReference */ ? node.moduleReference.expression : undefined;
            case 179 /* ImportType */:
                return isLiteralImportTypeNode(node) ? node.argument.literal : undefined;
            default:
                return ts.Debug.assertNever(node);
        }
    }
    ts.getExternalModuleName = getExternalModuleName;
    function getNamespaceDeclarationNode(node) {
        switch (node.kind) {
            case 244 /* ImportDeclaration */:
                return node.importClause && ts.tryCast(node.importClause.namedBindings, ts.isNamespaceImport);
            case 243 /* ImportEqualsDeclaration */:
                return node;
            case 250 /* ExportDeclaration */:
                return undefined;
            default:
                return ts.Debug.assertNever(node);
        }
    }
    ts.getNamespaceDeclarationNode = getNamespaceDeclarationNode;
    function isDefaultImport(node) {
        return node.kind === 244 /* ImportDeclaration */ && !!node.importClause && !!node.importClause.name;
    }
    ts.isDefaultImport = isDefaultImport;
    function hasQuestionToken(node) {
        if (node) {
            switch (node.kind) {
                case 149 /* Parameter */:
                case 154 /* MethodDeclaration */:
                case 153 /* MethodSignature */:
                case 271 /* ShorthandPropertyAssignment */:
                case 270 /* PropertyAssignment */:
                case 152 /* PropertyDeclaration */:
                case 151 /* PropertySignature */:
                    return node.questionToken !== undefined;
            }
        }
        return false;
    }
    ts.hasQuestionToken = hasQuestionToken;
    function isJSDocConstructSignature(node) {
        return node.kind === 284 /* JSDocFunctionType */ &&
            node.parameters.length > 0 &&
            node.parameters[0].name &&
            node.parameters[0].name.escapedText === "new";
    }
    ts.isJSDocConstructSignature = isJSDocConstructSignature;
    function isJSDocTypeAlias(node) {
        return node.kind === 297 /* JSDocTypedefTag */ || node.kind === 292 /* JSDocCallbackTag */;
    }
    ts.isJSDocTypeAlias = isJSDocTypeAlias;
    function isTypeAlias(node) {
        return isJSDocTypeAlias(node) || ts.isTypeAliasDeclaration(node);
    }
    ts.isTypeAlias = isTypeAlias;
    function getSourceOfAssignment(node) {
        return ts.isExpressionStatement(node) &&
            node.expression && ts.isBinaryExpression(node.expression) &&
            node.expression.operatorToken.kind === 58 /* EqualsToken */
            ? node.expression.right
            : undefined;
    }
    function getSourceOfDefaultedAssignment(node) {
        return ts.isExpressionStatement(node) &&
            ts.isBinaryExpression(node.expression) &&
            getSpecialPropertyAssignmentKind(node.expression) !== 0 /* None */ &&
            ts.isBinaryExpression(node.expression.right) &&
            node.expression.right.operatorToken.kind === 54 /* BarBarToken */
            ? node.expression.right.right
            : undefined;
    }
    function getSingleInitializerOfVariableStatementOrPropertyDeclaration(node) {
        switch (node.kind) {
            case 214 /* VariableStatement */:
                var v = getSingleVariableOfVariableStatement(node);
                return v && v.initializer;
            case 152 /* PropertyDeclaration */:
                return node.initializer;
            case 270 /* PropertyAssignment */:
                return node.initializer;
        }
    }
    function getSingleVariableOfVariableStatement(node) {
        return ts.isVariableStatement(node) ? ts.firstOrUndefined(node.declarationList.declarations) : undefined;
    }
    function getNestedModuleDeclaration(node) {
        return ts.isModuleDeclaration(node) &&
            node.body &&
            node.body.kind === 239 /* ModuleDeclaration */
            ? node.body
            : undefined;
    }
    function getJSDocCommentsAndTags(hostNode) {
        var result;
        getJSDocCommentsAndTagsWorker(hostNode);
        return result || ts.emptyArray;
        function getJSDocCommentsAndTagsWorker(node) {
            var parent = node.parent;
            if (!parent)
                return;
            if (parent.kind === 270 /* PropertyAssignment */ || parent.kind === 152 /* PropertyDeclaration */ || getNestedModuleDeclaration(parent)) {
                getJSDocCommentsAndTagsWorker(parent);
            }
            // Try to recognize this pattern when node is initializer of variable declaration and JSDoc comments are on containing variable statement.
            // /**
            //   * @param {number} name
            //   * @returns {number}
            //   */
            // var x = function(name) { return name.length; }
            if (parent.parent && (getSingleVariableOfVariableStatement(parent.parent) === node)) {
                getJSDocCommentsAndTagsWorker(parent.parent);
            }
            if (parent.parent && parent.parent.parent &&
                (getSingleVariableOfVariableStatement(parent.parent.parent) ||
                    getSingleInitializerOfVariableStatementOrPropertyDeclaration(parent.parent.parent) === node ||
                    getSourceOfDefaultedAssignment(parent.parent.parent))) {
                getJSDocCommentsAndTagsWorker(parent.parent.parent);
            }
            if (ts.isBinaryExpression(node) && node.operatorToken.kind === 58 /* EqualsToken */ ||
                ts.isBinaryExpression(parent) && parent.operatorToken.kind === 58 /* EqualsToken */ ||
                node.kind === 185 /* PropertyAccessExpression */ && node.parent && node.parent.kind === 216 /* ExpressionStatement */) {
                getJSDocCommentsAndTagsWorker(parent);
            }
            // Pull parameter comments from declaring function as well
            if (node.kind === 149 /* Parameter */) {
                result = ts.addRange(result, ts.getJSDocParameterTags(node));
            }
            if (isVariableLike(node) && ts.hasInitializer(node) && node.initializer !== hostNode && ts.hasJSDocNodes(node.initializer)) {
                result = ts.addRange(result, node.initializer.jsDoc);
            }
            if (ts.hasJSDocNodes(node)) {
                result = ts.addRange(result, node.jsDoc);
            }
        }
    }
    ts.getJSDocCommentsAndTags = getJSDocCommentsAndTags;
    /** Does the opposite of `getJSDocParameterTags`: given a JSDoc parameter, finds the parameter corresponding to it. */
    function getParameterSymbolFromJSDoc(node) {
        if (node.symbol) {
            return node.symbol;
        }
        if (!ts.isIdentifier(node.name)) {
            return undefined;
        }
        var name = node.name.escapedText;
        var decl = getHostSignatureFromJSDoc(node);
        if (!decl) {
            return undefined;
        }
        var parameter = ts.find(decl.parameters, function (p) { return p.name.kind === 71 /* Identifier */ && p.name.escapedText === name; });
        return parameter && parameter.symbol;
    }
    ts.getParameterSymbolFromJSDoc = getParameterSymbolFromJSDoc;
    function getHostSignatureFromJSDoc(node) {
        return getHostSignatureFromJSDocHost(getJSDocHost(node));
    }
    ts.getHostSignatureFromJSDoc = getHostSignatureFromJSDoc;
    function getHostSignatureFromJSDocHost(host) {
        var decl = getSourceOfDefaultedAssignment(host) ||
            getSourceOfAssignment(host) ||
            getSingleInitializerOfVariableStatementOrPropertyDeclaration(host) ||
            getSingleVariableOfVariableStatement(host) ||
            getNestedModuleDeclaration(host) ||
            host;
        return decl && ts.isFunctionLike(decl) ? decl : undefined;
    }
    ts.getHostSignatureFromJSDocHost = getHostSignatureFromJSDocHost;
    function getJSDocHost(node) {
        return ts.Debug.assertDefined(findAncestor(node.parent, ts.isJSDoc)).parent;
    }
    ts.getJSDocHost = getJSDocHost;
    function getTypeParameterFromJsDoc(node) {
        var name = node.name.escapedText;
        var typeParameters = node.parent.parent.parent.typeParameters;
        return ts.find(typeParameters, function (p) { return p.name.escapedText === name; });
    }
    ts.getTypeParameterFromJsDoc = getTypeParameterFromJsDoc;
    function hasRestParameter(s) {
        var last = ts.lastOrUndefined(s.parameters);
        return !!last && isRestParameter(last);
    }
    ts.hasRestParameter = hasRestParameter;
    function isRestParameter(node) {
        var type = ts.isJSDocParameterTag(node) ? (node.typeExpression && node.typeExpression.type) : node.type;
        return node.dotDotDotToken !== undefined || !!type && type.kind === 285 /* JSDocVariadicType */;
    }
    ts.isRestParameter = isRestParameter;
    var AssignmentKind;
    (function (AssignmentKind) {
        AssignmentKind[AssignmentKind["None"] = 0] = "None";
        AssignmentKind[AssignmentKind["Definite"] = 1] = "Definite";
        AssignmentKind[AssignmentKind["Compound"] = 2] = "Compound";
    })(AssignmentKind = ts.AssignmentKind || (ts.AssignmentKind = {}));
    function getAssignmentTargetKind(node) {
        var parent = node.parent;
        while (true) {
            switch (parent.kind) {
                case 200 /* BinaryExpression */:
                    var binaryOperator = parent.operatorToken.kind;
                    return isAssignmentOperator(binaryOperator) && parent.left === node ?
                        binaryOperator === 58 /* EqualsToken */ ? 1 /* Definite */ : 2 /* Compound */ :
                        0 /* None */;
                case 198 /* PrefixUnaryExpression */:
                case 199 /* PostfixUnaryExpression */:
                    var unaryOperator = parent.operator;
                    return unaryOperator === 43 /* PlusPlusToken */ || unaryOperator === 44 /* MinusMinusToken */ ? 2 /* Compound */ : 0 /* None */;
                case 221 /* ForInStatement */:
                case 222 /* ForOfStatement */:
                    return parent.initializer === node ? 1 /* Definite */ : 0 /* None */;
                case 191 /* ParenthesizedExpression */:
                case 183 /* ArrayLiteralExpression */:
                case 204 /* SpreadElement */:
                case 209 /* NonNullExpression */:
                    node = parent;
                    break;
                case 271 /* ShorthandPropertyAssignment */:
                    if (parent.name !== node) {
                        return 0 /* None */;
                    }
                    node = parent.parent;
                    break;
                case 270 /* PropertyAssignment */:
                    if (parent.name === node) {
                        return 0 /* None */;
                    }
                    node = parent.parent;
                    break;
                default:
                    return 0 /* None */;
            }
            parent = node.parent;
        }
    }
    ts.getAssignmentTargetKind = getAssignmentTargetKind;
    // A node is an assignment target if it is on the left hand side of an '=' token, if it is parented by a property
    // assignment in an object literal that is an assignment target, or if it is parented by an array literal that is
    // an assignment target. Examples include 'a = xxx', '{ p: a } = xxx', '[{ a }] = xxx'.
    // (Note that `p` is not a target in the above examples, only `a`.)
    function isAssignmentTarget(node) {
        return getAssignmentTargetKind(node) !== 0 /* None */;
    }
    ts.isAssignmentTarget = isAssignmentTarget;
    /**
     * Indicates whether a node could contain a `var` VariableDeclarationList that contributes to
     * the same `var` declaration scope as the node's parent.
     */
    function isNodeWithPossibleHoistedDeclaration(node) {
        switch (node.kind) {
            case 213 /* Block */:
            case 214 /* VariableStatement */:
            case 226 /* WithStatement */:
            case 217 /* IfStatement */:
            case 227 /* SwitchStatement */:
            case 241 /* CaseBlock */:
            case 266 /* CaseClause */:
            case 267 /* DefaultClause */:
            case 228 /* LabeledStatement */:
            case 220 /* ForStatement */:
            case 221 /* ForInStatement */:
            case 222 /* ForOfStatement */:
            case 218 /* DoStatement */:
            case 219 /* WhileStatement */:
            case 230 /* TryStatement */:
            case 269 /* CatchClause */:
                return true;
        }
        return false;
    }
    ts.isNodeWithPossibleHoistedDeclaration = isNodeWithPossibleHoistedDeclaration;
    function isValueSignatureDeclaration(node) {
        return ts.isFunctionExpression(node) || ts.isArrowFunction(node) || ts.isMethodOrAccessor(node) || ts.isFunctionDeclaration(node) || ts.isConstructorDeclaration(node);
    }
    ts.isValueSignatureDeclaration = isValueSignatureDeclaration;
    function walkUp(node, kind) {
        while (node && node.kind === kind) {
            node = node.parent;
        }
        return node;
    }
    function walkUpParenthesizedTypes(node) {
        return walkUp(node, 173 /* ParenthesizedType */);
    }
    ts.walkUpParenthesizedTypes = walkUpParenthesizedTypes;
    function walkUpParenthesizedExpressions(node) {
        return walkUp(node, 191 /* ParenthesizedExpression */);
    }
    ts.walkUpParenthesizedExpressions = walkUpParenthesizedExpressions;
    function skipParentheses(node) {
        while (node.kind === 191 /* ParenthesizedExpression */) {
            node = node.expression;
        }
        return node;
    }
    ts.skipParentheses = skipParentheses;
    // a node is delete target iff. it is PropertyAccessExpression/ElementAccessExpression with parentheses skipped
    function isDeleteTarget(node) {
        if (node.kind !== 185 /* PropertyAccessExpression */ && node.kind !== 186 /* ElementAccessExpression */) {
            return false;
        }
        node = walkUpParenthesizedExpressions(node.parent);
        return node && node.kind === 194 /* DeleteExpression */;
    }
    ts.isDeleteTarget = isDeleteTarget;
    function isNodeDescendantOf(node, ancestor) {
        while (node) {
            if (node === ancestor)
                return true;
            node = node.parent;
        }
        return false;
    }
    ts.isNodeDescendantOf = isNodeDescendantOf;
    // True if `name` is the name of a declaration node
    function isDeclarationName(name) {
        return !ts.isSourceFile(name) && !ts.isBindingPattern(name) && ts.isDeclaration(name.parent) && name.parent.name === name;
    }
    ts.isDeclarationName = isDeclarationName;
    // See GH#16030
    function isAnyDeclarationName(name) {
        switch (name.kind) {
            case 71 /* Identifier */:
            case 9 /* StringLiteral */:
            case 8 /* NumericLiteral */: {
                var parent = name.parent;
                if (ts.isDeclaration(parent)) {
                    return parent.name === name;
                }
                else if (ts.isQualifiedName(name.parent)) {
                    var tag = name.parent.parent;
                    return ts.isJSDocParameterTag(tag) && tag.name === name.parent;
                }
                else {
                    var binExp = name.parent.parent;
                    return ts.isBinaryExpression(binExp) && getSpecialPropertyAssignmentKind(binExp) !== 0 /* None */ && ts.getNameOfDeclaration(binExp) === name;
                }
            }
            default:
                return false;
        }
    }
    ts.isAnyDeclarationName = isAnyDeclarationName;
    function isLiteralComputedPropertyDeclarationName(node) {
        return (node.kind === 9 /* StringLiteral */ || node.kind === 8 /* NumericLiteral */) &&
            node.parent.kind === 147 /* ComputedPropertyName */ &&
            ts.isDeclaration(node.parent.parent);
    }
    ts.isLiteralComputedPropertyDeclarationName = isLiteralComputedPropertyDeclarationName;
    // Return true if the given identifier is classified as an IdentifierName
    function isIdentifierName(node) {
        var parent = node.parent;
        switch (parent.kind) {
            case 152 /* PropertyDeclaration */:
            case 151 /* PropertySignature */:
            case 154 /* MethodDeclaration */:
            case 153 /* MethodSignature */:
            case 156 /* GetAccessor */:
            case 157 /* SetAccessor */:
            case 273 /* EnumMember */:
            case 270 /* PropertyAssignment */:
            case 185 /* PropertyAccessExpression */:
                // Name in member declaration or property name in property access
                return parent.name === node;
            case 146 /* QualifiedName */:
                // Name on right hand side of dot in a type query or type reference
                if (parent.right === node) {
                    while (parent.kind === 146 /* QualifiedName */) {
                        parent = parent.parent;
                    }
                    return parent.kind === 165 /* TypeQuery */ || parent.kind === 162 /* TypeReference */;
                }
                return false;
            case 182 /* BindingElement */:
            case 248 /* ImportSpecifier */:
                // Property name in binding element or import specifier
                return parent.propertyName === node;
            case 252 /* ExportSpecifier */:
            case 262 /* JsxAttribute */:
                // Any name in an export specifier or JSX Attribute
                return true;
        }
        return false;
    }
    ts.isIdentifierName = isIdentifierName;
    // An alias symbol is created by one of the following declarations:
    // import <symbol> = ...
    // import <symbol> from ...
    // import * as <symbol> from ...
    // import { x as <symbol> } from ...
    // export { x as <symbol> } from ...
    // export = <EntityNameExpression>
    // export default <EntityNameExpression>
    function isAliasSymbolDeclaration(node) {
        return node.kind === 243 /* ImportEqualsDeclaration */ ||
            node.kind === 242 /* NamespaceExportDeclaration */ ||
            node.kind === 245 /* ImportClause */ && !!node.name ||
            node.kind === 246 /* NamespaceImport */ ||
            node.kind === 248 /* ImportSpecifier */ ||
            node.kind === 252 /* ExportSpecifier */ ||
            node.kind === 249 /* ExportAssignment */ && exportAssignmentIsAlias(node) ||
            ts.isBinaryExpression(node) && getSpecialPropertyAssignmentKind(node) === 2 /* ModuleExports */;
    }
    ts.isAliasSymbolDeclaration = isAliasSymbolDeclaration;
    function exportAssignmentIsAlias(node) {
        var e = ts.isExportAssignment(node) ? node.expression : node.right;
        return isEntityNameExpression(e) || ts.isClassExpression(e);
    }
    ts.exportAssignmentIsAlias = exportAssignmentIsAlias;
    function getClassExtendsHeritageClauseElement(node) {
        var heritageClause = getHeritageClause(node.heritageClauses, 85 /* ExtendsKeyword */);
        return heritageClause && heritageClause.types.length > 0 ? heritageClause.types[0] : undefined;
    }
    ts.getClassExtendsHeritageClauseElement = getClassExtendsHeritageClauseElement;
    function getClassImplementsHeritageClauseElements(node) {
        var heritageClause = getHeritageClause(node.heritageClauses, 108 /* ImplementsKeyword */);
        return heritageClause ? heritageClause.types : undefined;
    }
    ts.getClassImplementsHeritageClauseElements = getClassImplementsHeritageClauseElements;
    /** Returns the node in an `extends` or `implements` clause of a class or interface. */
    function getAllSuperTypeNodes(node) {
        return ts.isInterfaceDeclaration(node) ? getInterfaceBaseTypeNodes(node) || ts.emptyArray
            : ts.isClassLike(node) ? ts.concatenate(ts.singleElementArray(getClassExtendsHeritageClauseElement(node)), getClassImplementsHeritageClauseElements(node)) || ts.emptyArray
                : ts.emptyArray;
    }
    ts.getAllSuperTypeNodes = getAllSuperTypeNodes;
    function getInterfaceBaseTypeNodes(node) {
        var heritageClause = getHeritageClause(node.heritageClauses, 85 /* ExtendsKeyword */);
        return heritageClause ? heritageClause.types : undefined;
    }
    ts.getInterfaceBaseTypeNodes = getInterfaceBaseTypeNodes;
    function getHeritageClause(clauses, kind) {
        if (clauses) {
            for (var _i = 0, clauses_1 = clauses; _i < clauses_1.length; _i++) {
                var clause = clauses_1[_i];
                if (clause.token === kind) {
                    return clause;
                }
            }
        }
        return undefined;
    }
    ts.getHeritageClause = getHeritageClause;
    function tryResolveScriptReference(host, sourceFile, reference) {
        if (!host.getCompilerOptions().noResolve) {
            var referenceFileName = ts.isRootedDiskPath(reference.fileName) ? reference.fileName : ts.combinePaths(ts.getDirectoryPath(sourceFile.fileName), reference.fileName);
            return host.getSourceFile(referenceFileName);
        }
    }
    ts.tryResolveScriptReference = tryResolveScriptReference;
    function getAncestor(node, kind) {
        while (node) {
            if (node.kind === kind) {
                return node;
            }
            node = node.parent;
        }
        return undefined;
    }
    ts.getAncestor = getAncestor;
    function isKeyword(token) {
        return 72 /* FirstKeyword */ <= token && token <= 145 /* LastKeyword */;
    }
    ts.isKeyword = isKeyword;
    function isContextualKeyword(token) {
        return 117 /* FirstContextualKeyword */ <= token && token <= 145 /* LastContextualKeyword */;
    }
    ts.isContextualKeyword = isContextualKeyword;
    function isNonContextualKeyword(token) {
        return isKeyword(token) && !isContextualKeyword(token);
    }
    ts.isNonContextualKeyword = isNonContextualKeyword;
    function isStringANonContextualKeyword(name) {
        var token = ts.stringToToken(name);
        return token !== undefined && isNonContextualKeyword(token);
    }
    ts.isStringANonContextualKeyword = isStringANonContextualKeyword;
    function isTrivia(token) {
        return 2 /* FirstTriviaToken */ <= token && token <= 7 /* LastTriviaToken */;
    }
    ts.isTrivia = isTrivia;
    var FunctionFlags;
    (function (FunctionFlags) {
        FunctionFlags[FunctionFlags["Normal"] = 0] = "Normal";
        FunctionFlags[FunctionFlags["Generator"] = 1] = "Generator";
        FunctionFlags[FunctionFlags["Async"] = 2] = "Async";
        FunctionFlags[FunctionFlags["Invalid"] = 4] = "Invalid";
        FunctionFlags[FunctionFlags["AsyncGenerator"] = 3] = "AsyncGenerator";
    })(FunctionFlags = ts.FunctionFlags || (ts.FunctionFlags = {}));
    function getFunctionFlags(node) {
        if (!node) {
            return 4 /* Invalid */;
        }
        var flags = 0 /* Normal */;
        switch (node.kind) {
            case 234 /* FunctionDeclaration */:
            case 192 /* FunctionExpression */:
            case 154 /* MethodDeclaration */:
                if (node.asteriskToken) {
                    flags |= 1 /* Generator */;
                }
            // falls through
            case 193 /* ArrowFunction */:
                if (hasModifier(node, 256 /* Async */)) {
                    flags |= 2 /* Async */;
                }
                break;
        }
        if (!node.body) {
            flags |= 4 /* Invalid */;
        }
        return flags;
    }
    ts.getFunctionFlags = getFunctionFlags;
    function isAsyncFunction(node) {
        switch (node.kind) {
            case 234 /* FunctionDeclaration */:
            case 192 /* FunctionExpression */:
            case 193 /* ArrowFunction */:
            case 154 /* MethodDeclaration */:
                return node.body !== undefined
                    && node.asteriskToken === undefined
                    && hasModifier(node, 256 /* Async */);
        }
        return false;
    }
    ts.isAsyncFunction = isAsyncFunction;
    function isStringOrNumericLiteral(node) {
        var kind = node.kind;
        return kind === 9 /* StringLiteral */
            || kind === 8 /* NumericLiteral */;
    }
    ts.isStringOrNumericLiteral = isStringOrNumericLiteral;
    /**
     * A declaration has a dynamic name if both of the following are true:
     *   1. The declaration has a computed property name
     *   2. The computed name is *not* expressed as Symbol.<name>, where name
     *      is a property of the Symbol constructor that denotes a built in
     *      Symbol.
     */
    function hasDynamicName(declaration) {
        var name = ts.getNameOfDeclaration(declaration);
        return !!name && isDynamicName(name);
    }
    ts.hasDynamicName = hasDynamicName;
    function isDynamicName(name) {
        return name.kind === 147 /* ComputedPropertyName */ &&
            !isStringOrNumericLiteral(name.expression) &&
            !isWellKnownSymbolSyntactically(name.expression);
    }
    ts.isDynamicName = isDynamicName;
    /**
     * Checks if the expression is of the form:
     *    Symbol.name
     * where Symbol is literally the word "Symbol", and name is any identifierName
     */
    function isWellKnownSymbolSyntactically(node) {
        return ts.isPropertyAccessExpression(node) && isESSymbolIdentifier(node.expression);
    }
    ts.isWellKnownSymbolSyntactically = isWellKnownSymbolSyntactically;
    function getPropertyNameForPropertyNameNode(name) {
        if (name.kind === 71 /* Identifier */) {
            return name.escapedText;
        }
        if (name.kind === 9 /* StringLiteral */ || name.kind === 8 /* NumericLiteral */) {
            return escapeLeadingUnderscores(name.text);
        }
        if (name.kind === 147 /* ComputedPropertyName */) {
            var nameExpression = name.expression;
            if (isWellKnownSymbolSyntactically(nameExpression)) {
                return getPropertyNameForKnownSymbolName(ts.idText(nameExpression.name));
            }
            else if (nameExpression.kind === 9 /* StringLiteral */ || nameExpression.kind === 8 /* NumericLiteral */) {
                return escapeLeadingUnderscores(nameExpression.text);
            }
        }
        return undefined;
    }
    ts.getPropertyNameForPropertyNameNode = getPropertyNameForPropertyNameNode;
    function isPropertyNameLiteral(node) {
        switch (node.kind) {
            case 71 /* Identifier */:
            case 9 /* StringLiteral */:
            case 13 /* NoSubstitutionTemplateLiteral */:
            case 8 /* NumericLiteral */:
                return true;
            default:
                return false;
        }
    }
    ts.isPropertyNameLiteral = isPropertyNameLiteral;
    function getTextOfIdentifierOrLiteral(node) {
        return node.kind === 71 /* Identifier */ ? ts.idText(node) : node.text;
    }
    ts.getTextOfIdentifierOrLiteral = getTextOfIdentifierOrLiteral;
    function getEscapedTextOfIdentifierOrLiteral(node) {
        return node.kind === 71 /* Identifier */ ? node.escapedText : escapeLeadingUnderscores(node.text);
    }
    ts.getEscapedTextOfIdentifierOrLiteral = getEscapedTextOfIdentifierOrLiteral;
    function getPropertyNameForKnownSymbolName(symbolName) {
        return "__@" + symbolName;
    }
    ts.getPropertyNameForKnownSymbolName = getPropertyNameForKnownSymbolName;
    function isKnownSymbol(symbol) {
        return ts.startsWith(symbol.escapedName, "__@");
    }
    ts.isKnownSymbol = isKnownSymbol;
    /**
     * Includes the word "Symbol" with unicode escapes
     */
    function isESSymbolIdentifier(node) {
        return node.kind === 71 /* Identifier */ && node.escapedText === "Symbol";
    }
    ts.isESSymbolIdentifier = isESSymbolIdentifier;
    function isPushOrUnshiftIdentifier(node) {
        return node.escapedText === "push" || node.escapedText === "unshift";
    }
    ts.isPushOrUnshiftIdentifier = isPushOrUnshiftIdentifier;
    function isParameterDeclaration(node) {
        var root = getRootDeclaration(node);
        return root.kind === 149 /* Parameter */;
    }
    ts.isParameterDeclaration = isParameterDeclaration;
    function getRootDeclaration(node) {
        while (node.kind === 182 /* BindingElement */) {
            node = node.parent.parent;
        }
        return node;
    }
    ts.getRootDeclaration = getRootDeclaration;
    function nodeStartsNewLexicalEnvironment(node) {
        var kind = node.kind;
        return kind === 155 /* Constructor */
            || kind === 192 /* FunctionExpression */
            || kind === 234 /* FunctionDeclaration */
            || kind === 193 /* ArrowFunction */
            || kind === 154 /* MethodDeclaration */
            || kind === 156 /* GetAccessor */
            || kind === 157 /* SetAccessor */
            || kind === 239 /* ModuleDeclaration */
            || kind === 274 /* SourceFile */;
    }
    ts.nodeStartsNewLexicalEnvironment = nodeStartsNewLexicalEnvironment;
    function nodeIsSynthesized(range) {
        return ts.positionIsSynthesized(range.pos)
            || ts.positionIsSynthesized(range.end);
    }
    ts.nodeIsSynthesized = nodeIsSynthesized;
    function getOriginalSourceFile(sourceFile) {
        return ts.getParseTreeNode(sourceFile, ts.isSourceFile) || sourceFile;
    }
    ts.getOriginalSourceFile = getOriginalSourceFile;
    var Associativity;
    (function (Associativity) {
        Associativity[Associativity["Left"] = 0] = "Left";
        Associativity[Associativity["Right"] = 1] = "Right";
    })(Associativity = ts.Associativity || (ts.Associativity = {}));
    function getExpressionAssociativity(expression) {
        var operator = getOperator(expression);
        var hasArguments = expression.kind === 188 /* NewExpression */ && expression.arguments !== undefined;
        return getOperatorAssociativity(expression.kind, operator, hasArguments);
    }
    ts.getExpressionAssociativity = getExpressionAssociativity;
    function getOperatorAssociativity(kind, operator, hasArguments) {
        switch (kind) {
            case 188 /* NewExpression */:
                return hasArguments ? 0 /* Left */ : 1 /* Right */;
            case 198 /* PrefixUnaryExpression */:
            case 195 /* TypeOfExpression */:
            case 196 /* VoidExpression */:
            case 194 /* DeleteExpression */:
            case 197 /* AwaitExpression */:
            case 201 /* ConditionalExpression */:
            case 203 /* YieldExpression */:
                return 1 /* Right */;
            case 200 /* BinaryExpression */:
                switch (operator) {
                    case 40 /* AsteriskAsteriskToken */:
                    case 58 /* EqualsToken */:
                    case 59 /* PlusEqualsToken */:
                    case 60 /* MinusEqualsToken */:
                    case 62 /* AsteriskAsteriskEqualsToken */:
                    case 61 /* AsteriskEqualsToken */:
                    case 63 /* SlashEqualsToken */:
                    case 64 /* PercentEqualsToken */:
                    case 65 /* LessThanLessThanEqualsToken */:
                    case 66 /* GreaterThanGreaterThanEqualsToken */:
                    case 67 /* GreaterThanGreaterThanGreaterThanEqualsToken */:
                    case 68 /* AmpersandEqualsToken */:
                    case 70 /* CaretEqualsToken */:
                    case 69 /* BarEqualsToken */:
                        return 1 /* Right */;
                }
        }
        return 0 /* Left */;
    }
    ts.getOperatorAssociativity = getOperatorAssociativity;
    function getExpressionPrecedence(expression) {
        var operator = getOperator(expression);
        var hasArguments = expression.kind === 188 /* NewExpression */ && expression.arguments !== undefined;
        return getOperatorPrecedence(expression.kind, operator, hasArguments);
    }
    ts.getExpressionPrecedence = getExpressionPrecedence;
    function getOperator(expression) {
        if (expression.kind === 200 /* BinaryExpression */) {
            return expression.operatorToken.kind;
        }
        else if (expression.kind === 198 /* PrefixUnaryExpression */ || expression.kind === 199 /* PostfixUnaryExpression */) {
            return expression.operator;
        }
        else {
            return expression.kind;
        }
    }
    ts.getOperator = getOperator;
    function getOperatorPrecedence(nodeKind, operatorKind, hasArguments) {
        switch (nodeKind) {
            case 302 /* CommaListExpression */:
                return 0;
            case 204 /* SpreadElement */:
                return 1;
            case 203 /* YieldExpression */:
                return 2;
            case 201 /* ConditionalExpression */:
                return 4;
            case 200 /* BinaryExpression */:
                switch (operatorKind) {
                    case 26 /* CommaToken */:
                        return 0;
                    case 58 /* EqualsToken */:
                    case 59 /* PlusEqualsToken */:
                    case 60 /* MinusEqualsToken */:
                    case 62 /* AsteriskAsteriskEqualsToken */:
                    case 61 /* AsteriskEqualsToken */:
                    case 63 /* SlashEqualsToken */:
                    case 64 /* PercentEqualsToken */:
                    case 65 /* LessThanLessThanEqualsToken */:
                    case 66 /* GreaterThanGreaterThanEqualsToken */:
                    case 67 /* GreaterThanGreaterThanGreaterThanEqualsToken */:
                    case 68 /* AmpersandEqualsToken */:
                    case 70 /* CaretEqualsToken */:
                    case 69 /* BarEqualsToken */:
                        return 3;
                    default:
                        return getBinaryOperatorPrecedence(operatorKind);
                }
            case 198 /* PrefixUnaryExpression */:
            case 195 /* TypeOfExpression */:
            case 196 /* VoidExpression */:
            case 194 /* DeleteExpression */:
            case 197 /* AwaitExpression */:
                return 16;
            case 199 /* PostfixUnaryExpression */:
                return 17;
            case 187 /* CallExpression */:
                return 18;
            case 188 /* NewExpression */:
                return hasArguments ? 19 : 18;
            case 189 /* TaggedTemplateExpression */:
            case 185 /* PropertyAccessExpression */:
            case 186 /* ElementAccessExpression */:
                return 19;
            case 99 /* ThisKeyword */:
            case 97 /* SuperKeyword */:
            case 71 /* Identifier */:
            case 95 /* NullKeyword */:
            case 101 /* TrueKeyword */:
            case 86 /* FalseKeyword */:
            case 8 /* NumericLiteral */:
            case 9 /* StringLiteral */:
            case 183 /* ArrayLiteralExpression */:
            case 184 /* ObjectLiteralExpression */:
            case 192 /* FunctionExpression */:
            case 193 /* ArrowFunction */:
            case 205 /* ClassExpression */:
            case 255 /* JsxElement */:
            case 256 /* JsxSelfClosingElement */:
            case 259 /* JsxFragment */:
            case 12 /* RegularExpressionLiteral */:
            case 13 /* NoSubstitutionTemplateLiteral */:
            case 202 /* TemplateExpression */:
            case 191 /* ParenthesizedExpression */:
            case 206 /* OmittedExpression */:
                return 20;
            default:
                return -1;
        }
    }
    ts.getOperatorPrecedence = getOperatorPrecedence;
    /* @internal */
    function getBinaryOperatorPrecedence(kind) {
        switch (kind) {
            case 54 /* BarBarToken */:
                return 5;
            case 53 /* AmpersandAmpersandToken */:
                return 6;
            case 49 /* BarToken */:
                return 7;
            case 50 /* CaretToken */:
                return 8;
            case 48 /* AmpersandToken */:
                return 9;
            case 32 /* EqualsEqualsToken */:
            case 33 /* ExclamationEqualsToken */:
            case 34 /* EqualsEqualsEqualsToken */:
            case 35 /* ExclamationEqualsEqualsToken */:
                return 10;
            case 27 /* LessThanToken */:
            case 29 /* GreaterThanToken */:
            case 30 /* LessThanEqualsToken */:
            case 31 /* GreaterThanEqualsToken */:
            case 93 /* InstanceOfKeyword */:
            case 92 /* InKeyword */:
            case 118 /* AsKeyword */:
                return 11;
            case 45 /* LessThanLessThanToken */:
            case 46 /* GreaterThanGreaterThanToken */:
            case 47 /* GreaterThanGreaterThanGreaterThanToken */:
                return 12;
            case 37 /* PlusToken */:
            case 38 /* MinusToken */:
                return 13;
            case 39 /* AsteriskToken */:
            case 41 /* SlashToken */:
            case 42 /* PercentToken */:
                return 14;
            case 40 /* AsteriskAsteriskToken */:
                return 15;
        }
        // -1 is lower than all other precedences.  Returning it will cause binary expression
        // parsing to stop.
        return -1;
    }
    ts.getBinaryOperatorPrecedence = getBinaryOperatorPrecedence;
    function createDiagnosticCollection() {
        var nonFileDiagnostics = []; // See GH#19873
        var filesWithDiagnostics = [];
        var fileDiagnostics = ts.createMap();
        var hasReadNonFileDiagnostics = false;
        return {
            add: add,
            getGlobalDiagnostics: getGlobalDiagnostics,
            getDiagnostics: getDiagnostics,
            reattachFileDiagnostics: reattachFileDiagnostics
        };
        function reattachFileDiagnostics(newFile) {
            ts.forEach(fileDiagnostics.get(newFile.fileName), function (diagnostic) { return diagnostic.file = newFile; });
        }
        function add(diagnostic) {
            var diagnostics;
            if (diagnostic.file) {
                diagnostics = fileDiagnostics.get(diagnostic.file.fileName);
                if (!diagnostics) {
                    diagnostics = []; // See GH#19873
                    fileDiagnostics.set(diagnostic.file.fileName, diagnostics);
                    ts.insertSorted(filesWithDiagnostics, diagnostic.file.fileName, ts.compareStringsCaseSensitive);
                }
            }
            else {
                // If we've already read the non-file diagnostics, do not modify the existing array.
                if (hasReadNonFileDiagnostics) {
                    hasReadNonFileDiagnostics = false;
                    nonFileDiagnostics = nonFileDiagnostics.slice();
                }
                diagnostics = nonFileDiagnostics;
            }
            ts.insertSorted(diagnostics, diagnostic, ts.compareDiagnostics);
        }
        function getGlobalDiagnostics() {
            hasReadNonFileDiagnostics = true;
            return nonFileDiagnostics;
        }
        function getDiagnostics(fileName) {
            if (fileName) {
                return fileDiagnostics.get(fileName) || [];
            }
            var fileDiags = ts.flatMap(filesWithDiagnostics, function (f) { return fileDiagnostics.get(f); });
            if (!nonFileDiagnostics.length) {
                return fileDiags;
            }
            fileDiags.unshift.apply(fileDiags, nonFileDiagnostics);
            return fileDiags;
        }
    }
    ts.createDiagnosticCollection = createDiagnosticCollection;
    // This consists of the first 19 unprintable ASCII characters, canonical escapes, lineSeparator,
    // paragraphSeparator, and nextLine. The latter three are just desirable to suppress new lines in
    // the language service. These characters should be escaped when printing, and if any characters are added,
    // the map below must be updated. Note that this regexp *does not* include the 'delete' character.
    // There is no reason for this other than that JSON.stringify does not handle it either.
    var doubleQuoteEscapedCharsRegExp = /[\\\"\u0000-\u001f\t\v\f\b\r\n\u2028\u2029\u0085]/g;
    var singleQuoteEscapedCharsRegExp = /[\\\'\u0000-\u001f\t\v\f\b\r\n\u2028\u2029\u0085]/g;
    var backtickQuoteEscapedCharsRegExp = /[\\\`\u0000-\u001f\t\v\f\b\r\n\u2028\u2029\u0085]/g;
    var escapedCharsMap = ts.createMapFromTemplate({
        "\t": "\\t",
        "\v": "\\v",
        "\f": "\\f",
        "\b": "\\b",
        "\r": "\\r",
        "\n": "\\n",
        "\\": "\\\\",
        "\"": "\\\"",
        "\'": "\\\'",
        "\`": "\\\`",
        "\u2028": "\\u2028",
        "\u2029": "\\u2029",
        "\u0085": "\\u0085" // nextLine
    });
    /**
     * Based heavily on the abstract 'Quote'/'QuoteJSONString' operation from ECMA-262 (24.3.2.2),
     * but augmented for a few select characters (e.g. lineSeparator, paragraphSeparator, nextLine)
     * Note that this doesn't actually wrap the input in double quotes.
     */
    function escapeString(s, quoteChar) {
        var escapedCharsRegExp = quoteChar === 96 /* backtick */ ? backtickQuoteEscapedCharsRegExp :
            quoteChar === 39 /* singleQuote */ ? singleQuoteEscapedCharsRegExp :
                doubleQuoteEscapedCharsRegExp;
        return s.replace(escapedCharsRegExp, getReplacement);
    }
    ts.escapeString = escapeString;
    function getReplacement(c, offset, input) {
        if (c.charCodeAt(0) === 0 /* nullCharacter */) {
            var lookAhead = input.charCodeAt(offset + c.length);
            if (lookAhead >= 48 /* _0 */ && lookAhead <= 57 /* _9 */) {
                // If the null character is followed by digits, print as a hex escape to prevent the result from parsing as an octal (which is forbidden in strict mode)
                return "\\x00";
            }
            // Otherwise, keep printing a literal \0 for the null character
            return "\\0";
        }
        return escapedCharsMap.get(c) || get16BitUnicodeEscapeSequence(c.charCodeAt(0));
    }
    function isIntrinsicJsxName(name) {
        var ch = name.charCodeAt(0);
        return (ch >= 97 /* a */ && ch <= 122 /* z */) || name.indexOf("-") > -1;
    }
    ts.isIntrinsicJsxName = isIntrinsicJsxName;
    function get16BitUnicodeEscapeSequence(charCode) {
        var hexCharCode = charCode.toString(16).toUpperCase();
        var paddedHexCode = ("0000" + hexCharCode).slice(-4);
        return "\\u" + paddedHexCode;
    }
    var nonAsciiCharacters = /[^\u0000-\u007F]/g;
    function escapeNonAsciiString(s, quoteChar) {
        s = escapeString(s, quoteChar);
        // Replace non-ASCII characters with '\uNNNN' escapes if any exist.
        // Otherwise just return the original string.
        return nonAsciiCharacters.test(s) ?
            s.replace(nonAsciiCharacters, function (c) { return get16BitUnicodeEscapeSequence(c.charCodeAt(0)); }) :
            s;
    }
    ts.escapeNonAsciiString = escapeNonAsciiString;
    var indentStrings = ["", "    "];
    function getIndentString(level) {
        if (indentStrings[level] === undefined) {
            indentStrings[level] = getIndentString(level - 1) + indentStrings[1];
        }
        return indentStrings[level];
    }
    ts.getIndentString = getIndentString;
    function getIndentSize() {
        return indentStrings[1].length;
    }
    ts.getIndentSize = getIndentSize;
    function createTextWriter(newLine) {
        var output;
        var indent;
        var lineStart;
        var lineCount;
        var linePos;
        function updateLineCountAndPosFor(s) {
            var lineStartsOfS = ts.computeLineStarts(s);
            if (lineStartsOfS.length > 1) {
                lineCount = lineCount + lineStartsOfS.length - 1;
                linePos = output.length - s.length + ts.last(lineStartsOfS);
                lineStart = (linePos - output.length) === 0;
            }
            else {
                lineStart = false;
            }
        }
        function write(s) {
            if (s && s.length) {
                if (lineStart) {
                    s = getIndentString(indent) + s;
                    lineStart = false;
                }
                output += s;
                updateLineCountAndPosFor(s);
            }
        }
        function reset() {
            output = "";
            indent = 0;
            lineStart = true;
            lineCount = 0;
            linePos = 0;
        }
        function rawWrite(s) {
            if (s !== undefined) {
                output += s;
                updateLineCountAndPosFor(s);
            }
        }
        function writeLiteral(s) {
            if (s && s.length) {
                write(s);
            }
        }
        function writeLine() {
            if (!lineStart) {
                output += newLine;
                lineCount++;
                linePos = output.length;
                lineStart = true;
            }
        }
        function writeTextOfNode(text, node) {
            var s = getTextOfNodeFromSourceText(text, node);
            write(s);
            updateLineCountAndPosFor(s);
        }
        reset();
        return {
            write: write,
            rawWrite: rawWrite,
            writeTextOfNode: writeTextOfNode,
            writeLiteral: writeLiteral,
            writeLine: writeLine,
            increaseIndent: function () { indent++; },
            decreaseIndent: function () { indent--; },
            getIndent: function () { return indent; },
            getTextPos: function () { return output.length; },
            getLine: function () { return lineCount + 1; },
            getColumn: function () { return lineStart ? indent * getIndentSize() + 1 : output.length - linePos + 1; },
            getText: function () { return output; },
            isAtStartOfLine: function () { return lineStart; },
            clear: reset,
            reportInaccessibleThisError: ts.noop,
            reportPrivateInBaseOfClassExpression: ts.noop,
            reportInaccessibleUniqueSymbolError: ts.noop,
            trackSymbol: ts.noop,
            writeKeyword: write,
            writeOperator: write,
            writeParameter: write,
            writeProperty: write,
            writePunctuation: write,
            writeSpace: write,
            writeStringLiteral: write,
            writeSymbol: write
        };
    }
    ts.createTextWriter = createTextWriter;
    function getResolvedExternalModuleName(host, file, referenceFile) {
        return file.moduleName || getExternalModuleNameFromPath(host, file.fileName, referenceFile && referenceFile.fileName);
    }
    ts.getResolvedExternalModuleName = getResolvedExternalModuleName;
    function getExternalModuleNameFromDeclaration(host, resolver, declaration) {
        var file = resolver.getExternalModuleFileFromDeclaration(declaration);
        if (!file || file.isDeclarationFile) {
            return undefined;
        }
        return getResolvedExternalModuleName(host, file);
    }
    ts.getExternalModuleNameFromDeclaration = getExternalModuleNameFromDeclaration;
    /**
     * Resolves a local path to a path which is absolute to the base of the emit
     */
    function getExternalModuleNameFromPath(host, fileName, referencePath) {
        var getCanonicalFileName = function (f) { return host.getCanonicalFileName(f); };
        var dir = ts.toPath(referencePath ? ts.getDirectoryPath(referencePath) : host.getCommonSourceDirectory(), host.getCurrentDirectory(), getCanonicalFileName);
        var filePath = ts.getNormalizedAbsolutePath(fileName, host.getCurrentDirectory());
        var relativePath = ts.getRelativePathToDirectoryOrUrl(dir, filePath, dir, getCanonicalFileName, /*isAbsolutePathAnUrl*/ false);
        var extensionless = ts.removeFileExtension(relativePath);
        return referencePath ? ts.ensurePathIsNonModuleName(extensionless) : extensionless;
    }
    ts.getExternalModuleNameFromPath = getExternalModuleNameFromPath;
    function getOwnEmitOutputFilePath(sourceFile, host, extension) {
        var compilerOptions = host.getCompilerOptions();
        var emitOutputFilePathWithoutExtension;
        if (compilerOptions.outDir) {
            emitOutputFilePathWithoutExtension = ts.removeFileExtension(getSourceFilePathInNewDir(sourceFile, host, compilerOptions.outDir));
        }
        else {
            emitOutputFilePathWithoutExtension = ts.removeFileExtension(sourceFile.fileName);
        }
        return emitOutputFilePathWithoutExtension + extension;
    }
    ts.getOwnEmitOutputFilePath = getOwnEmitOutputFilePath;
    function getDeclarationEmitOutputFilePath(sourceFile, host) {
        var options = host.getCompilerOptions();
        var outputDir = options.declarationDir || options.outDir; // Prefer declaration folder if specified
        var path = outputDir
            ? getSourceFilePathInNewDir(sourceFile, host, outputDir)
            : sourceFile.fileName;
        return ts.removeFileExtension(path) + ".d.ts" /* Dts */;
    }
    ts.getDeclarationEmitOutputFilePath = getDeclarationEmitOutputFilePath;
    /**
     * Gets the source files that are expected to have an emit output.
     *
     * Originally part of `forEachExpectedEmitFile`, this functionality was extracted to support
     * transformations.
     *
     * @param host An EmitHost.
     * @param targetSourceFile An optional target source file to emit.
     */
    function getSourceFilesToEmit(host, targetSourceFile) {
        var options = host.getCompilerOptions();
        var isSourceFileFromExternalLibrary = function (file) { return host.isSourceFileFromExternalLibrary(file); };
        if (options.outFile || options.out) {
            var moduleKind = ts.getEmitModuleKind(options);
            var moduleEmitEnabled_1 = moduleKind === ts.ModuleKind.AMD || moduleKind === ts.ModuleKind.System;
            // Can emit only sources that are not declaration file and are either non module code or module with --module or --target es6 specified
            return ts.filter(host.getSourceFiles(), function (sourceFile) {
                return (moduleEmitEnabled_1 || !ts.isExternalModule(sourceFile)) && sourceFileMayBeEmitted(sourceFile, options, isSourceFileFromExternalLibrary);
            });
        }
        else {
            var sourceFiles = targetSourceFile === undefined ? host.getSourceFiles() : [targetSourceFile];
            return ts.filter(sourceFiles, function (sourceFile) { return sourceFileMayBeEmitted(sourceFile, options, isSourceFileFromExternalLibrary); });
        }
    }
    ts.getSourceFilesToEmit = getSourceFilesToEmit;
    /** Don't call this for `--outFile`, just for `--outDir` or plain emit. `--outFile` needs additional checks. */
    function sourceFileMayBeEmitted(sourceFile, options, isSourceFileFromExternalLibrary) {
        return !(options.noEmitForJsFiles && isSourceFileJavaScript(sourceFile)) && !sourceFile.isDeclarationFile && !isSourceFileFromExternalLibrary(sourceFile);
    }
    ts.sourceFileMayBeEmitted = sourceFileMayBeEmitted;
    function getSourceFilePathInNewDir(sourceFile, host, newDirPath) {
        var sourceFilePath = ts.getNormalizedAbsolutePath(sourceFile.fileName, host.getCurrentDirectory());
        var commonSourceDirectory = host.getCommonSourceDirectory();
        var isSourceFileInCommonSourceDirectory = host.getCanonicalFileName(sourceFilePath).indexOf(host.getCanonicalFileName(commonSourceDirectory)) === 0;
        sourceFilePath = isSourceFileInCommonSourceDirectory ? sourceFilePath.substring(commonSourceDirectory.length) : sourceFilePath;
        return ts.combinePaths(newDirPath, sourceFilePath);
    }
    ts.getSourceFilePathInNewDir = getSourceFilePathInNewDir;
    function writeFile(host, diagnostics, fileName, data, writeByteOrderMark, sourceFiles) {
        host.writeFile(fileName, data, writeByteOrderMark, function (hostErrorMessage) {
            diagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Could_not_write_file_0_Colon_1, fileName, hostErrorMessage));
        }, sourceFiles);
    }
    ts.writeFile = writeFile;
    function getLineOfLocalPosition(currentSourceFile, pos) {
        return ts.getLineAndCharacterOfPosition(currentSourceFile, pos).line;
    }
    ts.getLineOfLocalPosition = getLineOfLocalPosition;
    function getLineOfLocalPositionFromLineMap(lineMap, pos) {
        return ts.computeLineAndCharacterOfPosition(lineMap, pos).line;
    }
    ts.getLineOfLocalPositionFromLineMap = getLineOfLocalPositionFromLineMap;
    function getFirstConstructorWithBody(node) {
        return ts.find(node.members, function (member) { return ts.isConstructorDeclaration(member) && nodeIsPresent(member.body); });
    }
    ts.getFirstConstructorWithBody = getFirstConstructorWithBody;
    function getSetAccessorValueParameter(accessor) {
        if (accessor && accessor.parameters.length > 0) {
            var hasThis = accessor.parameters.length === 2 && parameterIsThisKeyword(accessor.parameters[0]);
            return accessor.parameters[hasThis ? 1 : 0];
        }
    }
    /** Get the type annotation for the value parameter. */
    function getSetAccessorTypeAnnotationNode(accessor) {
        var parameter = getSetAccessorValueParameter(accessor);
        return parameter && parameter.type;
    }
    ts.getSetAccessorTypeAnnotationNode = getSetAccessorTypeAnnotationNode;
    function getThisParameter(signature) {
        // callback tags do not currently support this parameters
        if (signature.parameters.length && !ts.isJSDocSignature(signature)) {
            var thisParameter = signature.parameters[0];
            if (parameterIsThisKeyword(thisParameter)) {
                return thisParameter;
            }
        }
    }
    ts.getThisParameter = getThisParameter;
    function parameterIsThisKeyword(parameter) {
        return isThisIdentifier(parameter.name);
    }
    ts.parameterIsThisKeyword = parameterIsThisKeyword;
    function isThisIdentifier(node) {
        return !!node && node.kind === 71 /* Identifier */ && identifierIsThisKeyword(node);
    }
    ts.isThisIdentifier = isThisIdentifier;
    function identifierIsThisKeyword(id) {
        return id.originalKeywordKind === 99 /* ThisKeyword */;
    }
    ts.identifierIsThisKeyword = identifierIsThisKeyword;
    function getAllAccessorDeclarations(declarations, accessor) {
        // TODO: GH#18217
        var firstAccessor;
        var secondAccessor;
        var getAccessor;
        var setAccessor;
        if (hasDynamicName(accessor)) {
            firstAccessor = accessor;
            if (accessor.kind === 156 /* GetAccessor */) {
                getAccessor = accessor;
            }
            else if (accessor.kind === 157 /* SetAccessor */) {
                setAccessor = accessor;
            }
            else {
                ts.Debug.fail("Accessor has wrong kind");
            }
        }
        else {
            ts.forEach(declarations, function (member) {
                if ((member.kind === 156 /* GetAccessor */ || member.kind === 157 /* SetAccessor */)
                    && hasModifier(member, 32 /* Static */) === hasModifier(accessor, 32 /* Static */)) {
                    var memberName = getPropertyNameForPropertyNameNode(member.name);
                    var accessorName = getPropertyNameForPropertyNameNode(accessor.name);
                    if (memberName === accessorName) {
                        if (!firstAccessor) {
                            firstAccessor = member;
                        }
                        else if (!secondAccessor) {
                            secondAccessor = member;
                        }
                        if (member.kind === 156 /* GetAccessor */ && !getAccessor) {
                            getAccessor = member;
                        }
                        if (member.kind === 157 /* SetAccessor */ && !setAccessor) {
                            setAccessor = member;
                        }
                    }
                }
            });
        }
        return {
            firstAccessor: firstAccessor,
            secondAccessor: secondAccessor,
            getAccessor: getAccessor,
            setAccessor: setAccessor
        };
    }
    ts.getAllAccessorDeclarations = getAllAccessorDeclarations;
    /**
     * Gets the effective type annotation of a variable, parameter, or property. If the node was
     * parsed in a JavaScript file, gets the type annotation from JSDoc.
     */
    function getEffectiveTypeAnnotationNode(node) {
        return node.type || (isInJavaScriptFile(node) ? ts.getJSDocType(node) : undefined);
    }
    ts.getEffectiveTypeAnnotationNode = getEffectiveTypeAnnotationNode;
    function getTypeAnnotationNode(node) {
        return node.type;
    }
    ts.getTypeAnnotationNode = getTypeAnnotationNode;
    /**
     * Gets the effective return type annotation of a signature. If the node was parsed in a
     * JavaScript file, gets the return type annotation from JSDoc.
     */
    function getEffectiveReturnTypeNode(node) {
        if (ts.isJSDocSignature(node)) {
            return node.type && node.type.typeExpression && node.type.typeExpression.type;
        }
        return node.type || (isInJavaScriptFile(node) ? ts.getJSDocReturnType(node) : undefined);
    }
    ts.getEffectiveReturnTypeNode = getEffectiveReturnTypeNode;
    /**
     * Gets the effective type parameters. If the node was parsed in a
     * JavaScript file, gets the type parameters from the `@template` tag from JSDoc.
     */
    function getEffectiveTypeParameterDeclarations(node) {
        if (ts.isJSDocSignature(node)) {
            return ts.emptyArray;
        }
        if (isJSDocTypeAlias(node)) {
            ts.Debug.assert(node.parent.kind === 286 /* JSDocComment */);
            return ts.flatMap(node.parent.tags, function (tag) { return ts.isJSDocTemplateTag(tag) ? tag.typeParameters : undefined; });
        }
        return node.typeParameters || (isInJavaScriptFile(node) ? getJSDocTypeParameterDeclarations(node) : ts.emptyArray);
    }
    ts.getEffectiveTypeParameterDeclarations = getEffectiveTypeParameterDeclarations;
    function getJSDocTypeParameterDeclarations(node) {
        return ts.flatMap(ts.getJSDocTags(node), function (tag) { return isNonTypeAliasTemplate(tag) ? tag.typeParameters : undefined; });
    }
    ts.getJSDocTypeParameterDeclarations = getJSDocTypeParameterDeclarations;
    /** template tags are only available when a typedef isn't already using them */
    function isNonTypeAliasTemplate(tag) {
        return ts.isJSDocTemplateTag(tag) && !(tag.parent.kind === 286 /* JSDocComment */ && tag.parent.tags.some(isJSDocTypeAlias));
    }
    /**
     * Gets the effective type annotation of the value parameter of a set accessor. If the node
     * was parsed in a JavaScript file, gets the type annotation from JSDoc.
     */
    function getEffectiveSetAccessorTypeAnnotationNode(node) {
        var parameter = getSetAccessorValueParameter(node);
        return parameter && getEffectiveTypeAnnotationNode(parameter);
    }
    ts.getEffectiveSetAccessorTypeAnnotationNode = getEffectiveSetAccessorTypeAnnotationNode;
    function emitNewLineBeforeLeadingComments(lineMap, writer, node, leadingComments) {
        emitNewLineBeforeLeadingCommentsOfPosition(lineMap, writer, node.pos, leadingComments);
    }
    ts.emitNewLineBeforeLeadingComments = emitNewLineBeforeLeadingComments;
    function emitNewLineBeforeLeadingCommentsOfPosition(lineMap, writer, pos, leadingComments) {
        // If the leading comments start on different line than the start of node, write new line
        if (leadingComments && leadingComments.length && pos !== leadingComments[0].pos &&
            getLineOfLocalPositionFromLineMap(lineMap, pos) !== getLineOfLocalPositionFromLineMap(lineMap, leadingComments[0].pos)) {
            writer.writeLine();
        }
    }
    ts.emitNewLineBeforeLeadingCommentsOfPosition = emitNewLineBeforeLeadingCommentsOfPosition;
    function emitNewLineBeforeLeadingCommentOfPosition(lineMap, writer, pos, commentPos) {
        // If the leading comments start on different line than the start of node, write new line
        if (pos !== commentPos &&
            getLineOfLocalPositionFromLineMap(lineMap, pos) !== getLineOfLocalPositionFromLineMap(lineMap, commentPos)) {
            writer.writeLine();
        }
    }
    ts.emitNewLineBeforeLeadingCommentOfPosition = emitNewLineBeforeLeadingCommentOfPosition;
    function emitComments(text, lineMap, writer, comments, leadingSeparator, trailingSeparator, newLine, writeComment) {
        if (comments && comments.length > 0) {
            if (leadingSeparator) {
                writer.write(" ");
            }
            var emitInterveningSeparator = false;
            for (var _i = 0, comments_1 = comments; _i < comments_1.length; _i++) {
                var comment = comments_1[_i];
                if (emitInterveningSeparator) {
                    writer.write(" ");
                    emitInterveningSeparator = false;
                }
                writeComment(text, lineMap, writer, comment.pos, comment.end, newLine);
                if (comment.hasTrailingNewLine) {
                    writer.writeLine();
                }
                else {
                    emitInterveningSeparator = true;
                }
            }
            if (emitInterveningSeparator && trailingSeparator) {
                writer.write(" ");
            }
        }
    }
    ts.emitComments = emitComments;
    /**
     * Detached comment is a comment at the top of file or function body that is separated from
     * the next statement by space.
     */
    function emitDetachedComments(text, lineMap, writer, writeComment, node, newLine, removeComments) {
        var leadingComments;
        var currentDetachedCommentInfo;
        if (removeComments) {
            // removeComments is true, only reserve pinned comment at the top of file
            // For example:
            //      /*! Pinned Comment */
            //
            //      var x = 10;
            if (node.pos === 0) {
                leadingComments = ts.filter(ts.getLeadingCommentRanges(text, node.pos), isPinnedCommentLocal);
            }
        }
        else {
            // removeComments is false, just get detached as normal and bypass the process to filter comment
            leadingComments = ts.getLeadingCommentRanges(text, node.pos);
        }
        if (leadingComments) {
            var detachedComments = [];
            var lastComment = void 0;
            for (var _i = 0, leadingComments_1 = leadingComments; _i < leadingComments_1.length; _i++) {
                var comment = leadingComments_1[_i];
                if (lastComment) {
                    var lastCommentLine = getLineOfLocalPositionFromLineMap(lineMap, lastComment.end);
                    var commentLine = getLineOfLocalPositionFromLineMap(lineMap, comment.pos);
                    if (commentLine >= lastCommentLine + 2) {
                        // There was a blank line between the last comment and this comment.  This
                        // comment is not part of the copyright comments.  Return what we have so
                        // far.
                        break;
                    }
                }
                detachedComments.push(comment);
                lastComment = comment;
            }
            if (detachedComments.length) {
                // All comments look like they could have been part of the copyright header.  Make
                // sure there is at least one blank line between it and the node.  If not, it's not
                // a copyright header.
                var lastCommentLine = getLineOfLocalPositionFromLineMap(lineMap, ts.last(detachedComments).end);
                var nodeLine = getLineOfLocalPositionFromLineMap(lineMap, ts.skipTrivia(text, node.pos));
                if (nodeLine >= lastCommentLine + 2) {
                    // Valid detachedComments
                    emitNewLineBeforeLeadingComments(lineMap, writer, node, leadingComments);
                    emitComments(text, lineMap, writer, detachedComments, /*leadingSeparator*/ false, /*trailingSeparator*/ true, newLine, writeComment);
                    currentDetachedCommentInfo = { nodePos: node.pos, detachedCommentEndPos: ts.last(detachedComments).end };
                }
            }
        }
        return currentDetachedCommentInfo;
        function isPinnedCommentLocal(comment) {
            return isPinnedComment(text, comment.pos);
        }
    }
    ts.emitDetachedComments = emitDetachedComments;
    function writeCommentRange(text, lineMap, writer, commentPos, commentEnd, newLine) {
        if (text.charCodeAt(commentPos + 1) === 42 /* asterisk */) {
            var firstCommentLineAndCharacter = ts.computeLineAndCharacterOfPosition(lineMap, commentPos);
            var lineCount = lineMap.length;
            var firstCommentLineIndent = void 0;
            for (var pos = commentPos, currentLine = firstCommentLineAndCharacter.line; pos < commentEnd; currentLine++) {
                var nextLineStart = (currentLine + 1) === lineCount
                    ? text.length + 1
                    : lineMap[currentLine + 1];
                if (pos !== commentPos) {
                    // If we are not emitting first line, we need to write the spaces to adjust the alignment
                    if (firstCommentLineIndent === undefined) {
                        firstCommentLineIndent = calculateIndent(text, lineMap[firstCommentLineAndCharacter.line], commentPos);
                    }
                    // These are number of spaces writer is going to write at current indent
                    var currentWriterIndentSpacing = writer.getIndent() * getIndentSize();
                    // Number of spaces we want to be writing
                    // eg: Assume writer indent
                    // module m {
                    //         /* starts at character 9 this is line 1
                    //    * starts at character pos 4 line                        --1  = 8 - 8 + 3
                    //   More left indented comment */                            --2  = 8 - 8 + 2
                    //     class c { }
                    // }
                    // module m {
                    //     /* this is line 1 -- Assume current writer indent 8
                    //      * line                                                --3 = 8 - 4 + 5
                    //            More right indented comment */                  --4 = 8 - 4 + 11
                    //     class c { }
                    // }
                    var spacesToEmit = currentWriterIndentSpacing - firstCommentLineIndent + calculateIndent(text, pos, nextLineStart);
                    if (spacesToEmit > 0) {
                        var numberOfSingleSpacesToEmit = spacesToEmit % getIndentSize();
                        var indentSizeSpaceString = getIndentString((spacesToEmit - numberOfSingleSpacesToEmit) / getIndentSize());
                        // Write indent size string ( in eg 1: = "", 2: "" , 3: string with 8 spaces 4: string with 12 spaces
                        writer.rawWrite(indentSizeSpaceString);
                        // Emit the single spaces (in eg: 1: 3 spaces, 2: 2 spaces, 3: 1 space, 4: 3 spaces)
                        while (numberOfSingleSpacesToEmit) {
                            writer.rawWrite(" ");
                            numberOfSingleSpacesToEmit--;
                        }
                    }
                    else {
                        // No spaces to emit write empty string
                        writer.rawWrite("");
                    }
                }
                // Write the comment line text
                writeTrimmedCurrentLine(text, commentEnd, writer, newLine, pos, nextLineStart);
                pos = nextLineStart;
            }
        }
        else {
            // Single line comment of style //....
            writer.write(text.substring(commentPos, commentEnd));
        }
    }
    ts.writeCommentRange = writeCommentRange;
    function writeTrimmedCurrentLine(text, commentEnd, writer, newLine, pos, nextLineStart) {
        var end = Math.min(commentEnd, nextLineStart - 1);
        var currentLineText = text.substring(pos, end).replace(/^\s+|\s+$/g, "");
        if (currentLineText) {
            // trimmed forward and ending spaces text
            writer.write(currentLineText);
            if (end !== commentEnd) {
                writer.writeLine();
            }
        }
        else {
            // Empty string - make sure we write empty line
            writer.writeLiteral(newLine);
        }
    }
    function calculateIndent(text, pos, end) {
        var currentLineIndent = 0;
        for (; pos < end && ts.isWhiteSpaceSingleLine(text.charCodeAt(pos)); pos++) {
            if (text.charCodeAt(pos) === 9 /* tab */) {
                // Tabs = TabSize = indent size and go to next tabStop
                currentLineIndent += getIndentSize() - (currentLineIndent % getIndentSize());
            }
            else {
                // Single space
                currentLineIndent++;
            }
        }
        return currentLineIndent;
    }
    function hasModifiers(node) {
        return getModifierFlags(node) !== 0 /* None */;
    }
    ts.hasModifiers = hasModifiers;
    function hasModifier(node, flags) {
        return !!getSelectedModifierFlags(node, flags);
    }
    ts.hasModifier = hasModifier;
    function hasStaticModifier(node) {
        return hasModifier(node, 32 /* Static */);
    }
    ts.hasStaticModifier = hasStaticModifier;
    function hasReadonlyModifier(node) {
        return hasModifier(node, 64 /* Readonly */);
    }
    ts.hasReadonlyModifier = hasReadonlyModifier;
    function getSelectedModifierFlags(node, flags) {
        return getModifierFlags(node) & flags;
    }
    ts.getSelectedModifierFlags = getSelectedModifierFlags;
    function getModifierFlags(node) {
        if (node.modifierFlagsCache & 536870912 /* HasComputedFlags */) {
            return node.modifierFlagsCache & ~536870912 /* HasComputedFlags */;
        }
        var flags = getModifierFlagsNoCache(node);
        node.modifierFlagsCache = flags | 536870912 /* HasComputedFlags */;
        return flags;
    }
    ts.getModifierFlags = getModifierFlags;
    function getModifierFlagsNoCache(node) {
        var flags = 0 /* None */;
        if (node.modifiers) {
            for (var _i = 0, _a = node.modifiers; _i < _a.length; _i++) {
                var modifier = _a[_i];
                flags |= modifierToFlag(modifier.kind);
            }
        }
        if (node.flags & 4 /* NestedNamespace */ || (node.kind === 71 /* Identifier */ && node.isInJSDocNamespace)) {
            flags |= 1 /* Export */;
        }
        return flags;
    }
    ts.getModifierFlagsNoCache = getModifierFlagsNoCache;
    function modifierToFlag(token) {
        switch (token) {
            case 115 /* StaticKeyword */: return 32 /* Static */;
            case 114 /* PublicKeyword */: return 4 /* Public */;
            case 113 /* ProtectedKeyword */: return 16 /* Protected */;
            case 112 /* PrivateKeyword */: return 8 /* Private */;
            case 117 /* AbstractKeyword */: return 128 /* Abstract */;
            case 84 /* ExportKeyword */: return 1 /* Export */;
            case 124 /* DeclareKeyword */: return 2 /* Ambient */;
            case 76 /* ConstKeyword */: return 2048 /* Const */;
            case 79 /* DefaultKeyword */: return 512 /* Default */;
            case 120 /* AsyncKeyword */: return 256 /* Async */;
            case 132 /* ReadonlyKeyword */: return 64 /* Readonly */;
        }
        return 0 /* None */;
    }
    ts.modifierToFlag = modifierToFlag;
    function isLogicalOperator(token) {
        return token === 54 /* BarBarToken */
            || token === 53 /* AmpersandAmpersandToken */
            || token === 51 /* ExclamationToken */;
    }
    ts.isLogicalOperator = isLogicalOperator;
    function isAssignmentOperator(token) {
        return token >= 58 /* FirstAssignment */ && token <= 70 /* LastAssignment */;
    }
    ts.isAssignmentOperator = isAssignmentOperator;
    /** Get `C` given `N` if `N` is in the position `class C extends N` where `N` is an ExpressionWithTypeArguments. */
    function tryGetClassExtendingExpressionWithTypeArguments(node) {
        if (ts.isExpressionWithTypeArguments(node) &&
            node.parent.token === 85 /* ExtendsKeyword */ &&
            ts.isClassLike(node.parent.parent)) {
            return node.parent.parent;
        }
    }
    ts.tryGetClassExtendingExpressionWithTypeArguments = tryGetClassExtendingExpressionWithTypeArguments;
    function isAssignmentExpression(node, excludeCompoundAssignment) {
        return ts.isBinaryExpression(node)
            && (excludeCompoundAssignment
                ? node.operatorToken.kind === 58 /* EqualsToken */
                : isAssignmentOperator(node.operatorToken.kind))
            && ts.isLeftHandSideExpression(node.left);
    }
    ts.isAssignmentExpression = isAssignmentExpression;
    function isDestructuringAssignment(node) {
        if (isAssignmentExpression(node, /*excludeCompoundAssignment*/ true)) {
            var kind = node.left.kind;
            return kind === 184 /* ObjectLiteralExpression */
                || kind === 183 /* ArrayLiteralExpression */;
        }
        return false;
    }
    ts.isDestructuringAssignment = isDestructuringAssignment;
    function isExpressionWithTypeArgumentsInClassExtendsClause(node) {
        return tryGetClassExtendingExpressionWithTypeArguments(node) !== undefined;
    }
    ts.isExpressionWithTypeArgumentsInClassExtendsClause = isExpressionWithTypeArgumentsInClassExtendsClause;
    function isExpressionWithTypeArgumentsInClassImplementsClause(node) {
        return node.kind === 207 /* ExpressionWithTypeArguments */
            && isEntityNameExpression(node.expression)
            && node.parent
            && node.parent.token === 108 /* ImplementsKeyword */
            && node.parent.parent
            && ts.isClassLike(node.parent.parent);
    }
    ts.isExpressionWithTypeArgumentsInClassImplementsClause = isExpressionWithTypeArgumentsInClassImplementsClause;
    function isEntityNameExpression(node) {
        return node.kind === 71 /* Identifier */ || isPropertyAccessEntityNameExpression(node);
    }
    ts.isEntityNameExpression = isEntityNameExpression;
    function isPropertyAccessEntityNameExpression(node) {
        return ts.isPropertyAccessExpression(node) && isEntityNameExpression(node.expression);
    }
    ts.isPropertyAccessEntityNameExpression = isPropertyAccessEntityNameExpression;
    function isPrototypeAccess(node) {
        return ts.isPropertyAccessExpression(node) && node.name.escapedText === "prototype";
    }
    ts.isPrototypeAccess = isPrototypeAccess;
    function isRightSideOfQualifiedNameOrPropertyAccess(node) {
        return (node.parent.kind === 146 /* QualifiedName */ && node.parent.right === node) ||
            (node.parent.kind === 185 /* PropertyAccessExpression */ && node.parent.name === node);
    }
    ts.isRightSideOfQualifiedNameOrPropertyAccess = isRightSideOfQualifiedNameOrPropertyAccess;
    function isEmptyObjectLiteral(expression) {
        return expression.kind === 184 /* ObjectLiteralExpression */ &&
            expression.properties.length === 0;
    }
    ts.isEmptyObjectLiteral = isEmptyObjectLiteral;
    function isEmptyArrayLiteral(expression) {
        return expression.kind === 183 /* ArrayLiteralExpression */ &&
            expression.elements.length === 0;
    }
    ts.isEmptyArrayLiteral = isEmptyArrayLiteral;
    function getLocalSymbolForExportDefault(symbol) {
        return isExportDefaultSymbol(symbol) ? symbol.declarations[0].localSymbol : undefined;
    }
    ts.getLocalSymbolForExportDefault = getLocalSymbolForExportDefault;
    function isExportDefaultSymbol(symbol) {
        return symbol && ts.length(symbol.declarations) > 0 && hasModifier(symbol.declarations[0], 512 /* Default */);
    }
    /** Return ".ts", ".d.ts", or ".tsx", if that is the extension. */
    function tryExtractTypeScriptExtension(fileName) {
        return ts.find(ts.supportedTypescriptExtensionsForExtractExtension, function (extension) { return ts.fileExtensionIs(fileName, extension); });
    }
    ts.tryExtractTypeScriptExtension = tryExtractTypeScriptExtension;
    /**
     * Replace each instance of non-ascii characters by one, two, three, or four escape sequences
     * representing the UTF-8 encoding of the character, and return the expanded char code list.
     */
    function getExpandedCharCodes(input) {
        var output = [];
        var length = input.length;
        for (var i = 0; i < length; i++) {
            var charCode = input.charCodeAt(i);
            // handle utf8
            if (charCode < 0x80) {
                output.push(charCode);
            }
            else if (charCode < 0x800) {
                output.push((charCode >> 6) | 192);
                output.push((charCode & 63) | 128);
            }
            else if (charCode < 0x10000) {
                output.push((charCode >> 12) | 224);
                output.push(((charCode >> 6) & 63) | 128);
                output.push((charCode & 63) | 128);
            }
            else if (charCode < 0x20000) {
                output.push((charCode >> 18) | 240);
                output.push(((charCode >> 12) & 63) | 128);
                output.push(((charCode >> 6) & 63) | 128);
                output.push((charCode & 63) | 128);
            }
            else {
                ts.Debug.assert(false, "Unexpected code point");
            }
        }
        return output;
    }
    var base64Digits = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
    /**
     * Converts a string to a base-64 encoded ASCII string.
     */
    function convertToBase64(input) {
        var result = "";
        var charCodes = getExpandedCharCodes(input);
        var i = 0;
        var length = charCodes.length;
        var byte1, byte2, byte3, byte4;
        while (i < length) {
            // Convert every 6-bits in the input 3 character points
            // into a base64 digit
            byte1 = charCodes[i] >> 2;
            byte2 = (charCodes[i] & 3) << 4 | charCodes[i + 1] >> 4;
            byte3 = (charCodes[i + 1] & 15) << 2 | charCodes[i + 2] >> 6;
            byte4 = charCodes[i + 2] & 63;
            // We are out of characters in the input, set the extra
            // digits to 64 (padding character).
            if (i + 1 >= length) {
                byte3 = byte4 = 64;
            }
            else if (i + 2 >= length) {
                byte4 = 64;
            }
            // Write to the output
            result += base64Digits.charAt(byte1) + base64Digits.charAt(byte2) + base64Digits.charAt(byte3) + base64Digits.charAt(byte4);
            i += 3;
        }
        return result;
    }
    ts.convertToBase64 = convertToBase64;
    function getStringFromExpandedCharCodes(codes) {
        var output = "";
        var i = 0;
        var length = codes.length;
        while (i < length) {
            var charCode = codes[i];
            if (charCode < 0x80) {
                output += String.fromCharCode(charCode);
                i++;
            }
            else if ((charCode & 192) === 192) {
                var value = charCode & 63;
                i++;
                var nextCode = codes[i];
                while ((nextCode & 192) === 128) {
                    value = (value << 6) | (nextCode & 63);
                    i++;
                    nextCode = codes[i];
                }
                // `value` may be greater than 10FFFF (the maximum unicode codepoint) - JS will just make this into an invalid character for us
                output += String.fromCharCode(value);
            }
            else {
                // We don't want to kill the process when decoding fails (due to a following char byte not
                // following a leading char), so we just print the (bad) value
                output += String.fromCharCode(charCode);
                i++;
            }
        }
        return output;
    }
    function base64encode(host, input) {
        if (host && host.base64encode) {
            return host.base64encode(input);
        }
        return convertToBase64(input);
    }
    ts.base64encode = base64encode;
    function base64decode(host, input) {
        if (host && host.base64decode) {
            return host.base64decode(input);
        }
        var length = input.length;
        var expandedCharCodes = [];
        var i = 0;
        while (i < length) {
            // Stop decoding once padding characters are present
            if (input.charCodeAt(i) === base64Digits.charCodeAt(64)) {
                break;
            }
            // convert 4 input digits into three characters, ignoring padding characters at the end
            var ch1 = base64Digits.indexOf(input[i]);
            var ch2 = base64Digits.indexOf(input[i + 1]);
            var ch3 = base64Digits.indexOf(input[i + 2]);
            var ch4 = base64Digits.indexOf(input[i + 3]);
            var code1 = ((ch1 & 63) << 2) | ((ch2 >> 4) & 3);
            var code2 = ((ch2 & 15) << 4) | ((ch3 >> 2) & 15);
            var code3 = ((ch3 & 3) << 6) | (ch4 & 63);
            if (code2 === 0 && ch3 !== 0) { // code2 decoded to zero, but ch3 was padding - elide code2 and code3
                expandedCharCodes.push(code1);
            }
            else if (code3 === 0 && ch4 !== 0) { // code3 decoded to zero, but ch4 was padding, elide code3
                expandedCharCodes.push(code1, code2);
            }
            else {
                expandedCharCodes.push(code1, code2, code3);
            }
            i += 4;
        }
        return getStringFromExpandedCharCodes(expandedCharCodes);
    }
    ts.base64decode = base64decode;
    var carriageReturnLineFeed = "\r\n";
    var lineFeed = "\n";
    function getNewLineCharacter(options, getNewLine) {
        switch (options.newLine) {
            case 0 /* CarriageReturnLineFeed */:
                return carriageReturnLineFeed;
            case 1 /* LineFeed */:
                return lineFeed;
        }
        return getNewLine ? getNewLine() : ts.sys ? ts.sys.newLine : carriageReturnLineFeed;
    }
    ts.getNewLineCharacter = getNewLineCharacter;
    /**
     * Formats an enum value as a string for debugging and debug assertions.
     */
    function formatEnum(value, enumObject, isFlags) {
        if (value === void 0) { value = 0; }
        var members = getEnumMembers(enumObject);
        if (value === 0) {
            return members.length > 0 && members[0][0] === 0 ? members[0][1] : "0";
        }
        if (isFlags) {
            var result = "";
            var remainingFlags = value;
            for (var i = members.length - 1; i >= 0 && remainingFlags !== 0; i--) {
                var _a = members[i], enumValue = _a[0], enumName = _a[1];
                if (enumValue !== 0 && (remainingFlags & enumValue) === enumValue) {
                    remainingFlags &= ~enumValue;
                    result = "" + enumName + (result ? ", " : "") + result;
                }
            }
            if (remainingFlags === 0) {
                return result;
            }
        }
        else {
            for (var _i = 0, members_1 = members; _i < members_1.length; _i++) {
                var _b = members_1[_i], enumValue = _b[0], enumName = _b[1];
                if (enumValue === value) {
                    return enumName;
                }
            }
        }
        return value.toString();
    }
    function getEnumMembers(enumObject) {
        var result = [];
        for (var name in enumObject) {
            var value = enumObject[name];
            if (typeof value === "number") {
                result.push([value, name]);
            }
        }
        return ts.stableSort(result, function (x, y) { return ts.compareValues(x[0], y[0]); });
    }
    function formatSyntaxKind(kind) {
        return formatEnum(kind, ts.SyntaxKind, /*isFlags*/ false);
    }
    ts.formatSyntaxKind = formatSyntaxKind;
    function formatModifierFlags(flags) {
        return formatEnum(flags, ts.ModifierFlags, /*isFlags*/ true);
    }
    ts.formatModifierFlags = formatModifierFlags;
    function formatTransformFlags(flags) {
        return formatEnum(flags, ts.TransformFlags, /*isFlags*/ true);
    }
    ts.formatTransformFlags = formatTransformFlags;
    function formatEmitFlags(flags) {
        return formatEnum(flags, ts.EmitFlags, /*isFlags*/ true);
    }
    ts.formatEmitFlags = formatEmitFlags;
    function formatSymbolFlags(flags) {
        return formatEnum(flags, ts.SymbolFlags, /*isFlags*/ true);
    }
    ts.formatSymbolFlags = formatSymbolFlags;
    function formatTypeFlags(flags) {
        return formatEnum(flags, ts.TypeFlags, /*isFlags*/ true);
    }
    ts.formatTypeFlags = formatTypeFlags;
    function formatObjectFlags(flags) {
        return formatEnum(flags, ts.ObjectFlags, /*isFlags*/ true);
    }
    ts.formatObjectFlags = formatObjectFlags;
    /**
     * Creates a new TextRange from the provided pos and end.
     *
     * @param pos The start position.
     * @param end The end position.
     */
    function createRange(pos, end) {
        return { pos: pos, end: end };
    }
    ts.createRange = createRange;
    /**
     * Creates a new TextRange from a provided range with a new end position.
     *
     * @param range A TextRange.
     * @param end The new end position.
     */
    function moveRangeEnd(range, end) {
        return createRange(range.pos, end);
    }
    ts.moveRangeEnd = moveRangeEnd;
    /**
     * Creates a new TextRange from a provided range with a new start position.
     *
     * @param range A TextRange.
     * @param pos The new Start position.
     */
    function moveRangePos(range, pos) {
        return createRange(pos, range.end);
    }
    ts.moveRangePos = moveRangePos;
    /**
     * Moves the start position of a range past any decorators.
     */
    function moveRangePastDecorators(node) {
        return node.decorators && node.decorators.length > 0
            ? moveRangePos(node, node.decorators.end)
            : node;
    }
    ts.moveRangePastDecorators = moveRangePastDecorators;
    /**
     * Moves the start position of a range past any decorators or modifiers.
     */
    function moveRangePastModifiers(node) {
        return node.modifiers && node.modifiers.length > 0
            ? moveRangePos(node, node.modifiers.end)
            : moveRangePastDecorators(node);
    }
    ts.moveRangePastModifiers = moveRangePastModifiers;
    /**
     * Determines whether a TextRange has the same start and end positions.
     *
     * @param range A TextRange.
     */
    function isCollapsedRange(range) {
        return range.pos === range.end;
    }
    ts.isCollapsedRange = isCollapsedRange;
    /**
     * Creates a new TextRange for a token at the provides start position.
     *
     * @param pos The start position.
     * @param token The token.
     */
    function createTokenRange(pos, token) {
        return createRange(pos, pos + ts.tokenToString(token).length);
    }
    ts.createTokenRange = createTokenRange;
    function rangeIsOnSingleLine(range, sourceFile) {
        return rangeStartIsOnSameLineAsRangeEnd(range, range, sourceFile);
    }
    ts.rangeIsOnSingleLine = rangeIsOnSingleLine;
    function rangeStartPositionsAreOnSameLine(range1, range2, sourceFile) {
        return positionsAreOnSameLine(getStartPositionOfRange(range1, sourceFile), getStartPositionOfRange(range2, sourceFile), sourceFile);
    }
    ts.rangeStartPositionsAreOnSameLine = rangeStartPositionsAreOnSameLine;
    function rangeEndPositionsAreOnSameLine(range1, range2, sourceFile) {
        return positionsAreOnSameLine(range1.end, range2.end, sourceFile);
    }
    ts.rangeEndPositionsAreOnSameLine = rangeEndPositionsAreOnSameLine;
    function rangeStartIsOnSameLineAsRangeEnd(range1, range2, sourceFile) {
        return positionsAreOnSameLine(getStartPositionOfRange(range1, sourceFile), range2.end, sourceFile);
    }
    ts.rangeStartIsOnSameLineAsRangeEnd = rangeStartIsOnSameLineAsRangeEnd;
    function rangeEndIsOnSameLineAsRangeStart(range1, range2, sourceFile) {
        return positionsAreOnSameLine(range1.end, getStartPositionOfRange(range2, sourceFile), sourceFile);
    }
    ts.rangeEndIsOnSameLineAsRangeStart = rangeEndIsOnSameLineAsRangeStart;
    function positionsAreOnSameLine(pos1, pos2, sourceFile) {
        return pos1 === pos2 ||
            getLineOfLocalPosition(sourceFile, pos1) === getLineOfLocalPosition(sourceFile, pos2);
    }
    ts.positionsAreOnSameLine = positionsAreOnSameLine;
    function getStartPositionOfRange(range, sourceFile) {
        return ts.positionIsSynthesized(range.pos) ? -1 : ts.skipTrivia(sourceFile.text, range.pos);
    }
    ts.getStartPositionOfRange = getStartPositionOfRange;
    /**
     * Determines whether a name was originally the declaration name of an enum or namespace
     * declaration.
     */
    function isDeclarationNameOfEnumOrNamespace(node) {
        var parseNode = ts.getParseTreeNode(node);
        if (parseNode) {
            switch (parseNode.parent.kind) {
                case 238 /* EnumDeclaration */:
                case 239 /* ModuleDeclaration */:
                    return parseNode === parseNode.parent.name;
            }
        }
        return false;
    }
    ts.isDeclarationNameOfEnumOrNamespace = isDeclarationNameOfEnumOrNamespace;
    function getInitializedVariables(node) {
        return ts.filter(node.declarations, isInitializedVariable);
    }
    ts.getInitializedVariables = getInitializedVariables;
    function isInitializedVariable(node) {
        return node.initializer !== undefined;
    }
    function isWatchSet(options) {
        // Firefox has Object.prototype.watch
        return options.watch && options.hasOwnProperty("watch");
    }
    ts.isWatchSet = isWatchSet;
    function getCheckFlags(symbol) {
        return symbol.flags & 33554432 /* Transient */ ? symbol.checkFlags : 0;
    }
    ts.getCheckFlags = getCheckFlags;
    function getDeclarationModifierFlagsFromSymbol(s) {
        if (s.valueDeclaration) {
            var flags = ts.getCombinedModifierFlags(s.valueDeclaration);
            return s.parent && s.parent.flags & 32 /* Class */ ? flags : flags & ~28 /* AccessibilityModifier */;
        }
        if (getCheckFlags(s) & 6 /* Synthetic */) {
            var checkFlags = s.checkFlags;
            var accessModifier = checkFlags & 256 /* ContainsPrivate */ ? 8 /* Private */ :
                checkFlags & 64 /* ContainsPublic */ ? 4 /* Public */ :
                    16 /* Protected */;
            var staticModifier = checkFlags & 512 /* ContainsStatic */ ? 32 /* Static */ : 0;
            return accessModifier | staticModifier;
        }
        if (s.flags & 4194304 /* Prototype */) {
            return 4 /* Public */ | 32 /* Static */;
        }
        return 0;
    }
    ts.getDeclarationModifierFlagsFromSymbol = getDeclarationModifierFlagsFromSymbol;
    function skipAlias(symbol, checker) {
        return symbol.flags & 2097152 /* Alias */ ? checker.getAliasedSymbol(symbol) : symbol;
    }
    ts.skipAlias = skipAlias;
    /** See comment on `declareModuleMember` in `binder.ts`. */
    function getCombinedLocalAndExportSymbolFlags(symbol) {
        return symbol.exportSymbol ? symbol.exportSymbol.flags | symbol.flags : symbol.flags;
    }
    ts.getCombinedLocalAndExportSymbolFlags = getCombinedLocalAndExportSymbolFlags;
    function isWriteOnlyAccess(node) {
        return accessKind(node) === 1 /* Write */;
    }
    ts.isWriteOnlyAccess = isWriteOnlyAccess;
    function isWriteAccess(node) {
        return accessKind(node) !== 0 /* Read */;
    }
    ts.isWriteAccess = isWriteAccess;
    var AccessKind;
    (function (AccessKind) {
        /** Only reads from a variable. */
        AccessKind[AccessKind["Read"] = 0] = "Read";
        /** Only writes to a variable without using the result. E.g.: `x++;`. */
        AccessKind[AccessKind["Write"] = 1] = "Write";
        /** Writes to a variable and uses the result as an expression. E.g.: `f(x++);`. */
        AccessKind[AccessKind["ReadWrite"] = 2] = "ReadWrite";
    })(AccessKind || (AccessKind = {}));
    function accessKind(node) {
        var parent = node.parent;
        if (!parent)
            return 0 /* Read */;
        switch (parent.kind) {
            case 199 /* PostfixUnaryExpression */:
            case 198 /* PrefixUnaryExpression */:
                var operator = parent.operator;
                return operator === 43 /* PlusPlusToken */ || operator === 44 /* MinusMinusToken */ ? writeOrReadWrite() : 0 /* Read */;
            case 200 /* BinaryExpression */:
                var _a = parent, left = _a.left, operatorToken = _a.operatorToken;
                return left === node && isAssignmentOperator(operatorToken.kind) ? writeOrReadWrite() : 0 /* Read */;
            case 185 /* PropertyAccessExpression */:
                return parent.name !== node ? 0 /* Read */ : accessKind(parent);
            default:
                return 0 /* Read */;
        }
        function writeOrReadWrite() {
            // If grandparent is not an ExpressionStatement, this is used as an expression in addition to having a side effect.
            return parent.parent && parent.parent.kind === 216 /* ExpressionStatement */ ? 1 /* Write */ : 2 /* ReadWrite */;
        }
    }
    function compareDataObjects(dst, src) {
        if (!dst || !src || Object.keys(dst).length !== Object.keys(src).length) {
            return false;
        }
        for (var e in dst) {
            if (typeof dst[e] === "object") {
                if (!compareDataObjects(dst[e], src[e])) {
                    return false;
                }
            }
            else if (typeof dst[e] !== "function") {
                if (dst[e] !== src[e]) {
                    return false;
                }
            }
        }
        return true;
    }
    ts.compareDataObjects = compareDataObjects;
    /**
     * clears already present map by calling onDeleteExistingValue callback before deleting that key/value
     */
    function clearMap(map, onDeleteValue) {
        // Remove all
        map.forEach(onDeleteValue);
        map.clear();
    }
    ts.clearMap = clearMap;
    /**
     * Mutates the map with newMap such that keys in map will be same as newMap.
     */
    function mutateMap(map, newMap, options) {
        var createNewValue = options.createNewValue, onDeleteValue = options.onDeleteValue, onExistingValue = options.onExistingValue;
        // Needs update
        map.forEach(function (existingValue, key) {
            var valueInNewMap = newMap.get(key);
            // Not present any more in new map, remove it
            if (valueInNewMap === undefined) {
                map.delete(key);
                onDeleteValue(existingValue, key);
            }
            // If present notify about existing values
            else if (onExistingValue) {
                onExistingValue(existingValue, valueInNewMap, key);
            }
        });
        // Add new values that are not already present
        newMap.forEach(function (valueInNewMap, key) {
            if (!map.has(key)) {
                // New values
                map.set(key, createNewValue(key, valueInNewMap));
            }
        });
    }
    ts.mutateMap = mutateMap;
    /** Calls `callback` on `directory` and every ancestor directory it has, returning the first defined result. */
    function forEachAncestorDirectory(directory, callback) {
        while (true) {
            var result = callback(directory);
            if (result !== undefined) {
                return result;
            }
            var parentPath = ts.getDirectoryPath(directory);
            if (parentPath === directory) {
                return undefined;
            }
            directory = parentPath;
        }
    }
    ts.forEachAncestorDirectory = forEachAncestorDirectory;
    // Return true if the given type is the constructor type for an abstract class
    function isAbstractConstructorType(type) {
        return !!(getObjectFlags(type) & 16 /* Anonymous */) && !!type.symbol && isAbstractConstructorSymbol(type.symbol);
    }
    ts.isAbstractConstructorType = isAbstractConstructorType;
    function isAbstractConstructorSymbol(symbol) {
        if (symbol.flags & 32 /* Class */) {
            var declaration = getClassLikeDeclarationOfSymbol(symbol);
            return !!declaration && hasModifier(declaration, 128 /* Abstract */);
        }
        return false;
    }
    ts.isAbstractConstructorSymbol = isAbstractConstructorSymbol;
    function getClassLikeDeclarationOfSymbol(symbol) {
        return ts.find(symbol.declarations, ts.isClassLike);
    }
    ts.getClassLikeDeclarationOfSymbol = getClassLikeDeclarationOfSymbol;
    function getObjectFlags(type) {
        return type.flags & 131072 /* Object */ ? type.objectFlags : 0;
    }
    ts.getObjectFlags = getObjectFlags;
    function typeHasCallOrConstructSignatures(type, checker) {
        return checker.getSignaturesOfType(type, 0 /* Call */).length !== 0 || checker.getSignaturesOfType(type, 1 /* Construct */).length !== 0;
    }
    ts.typeHasCallOrConstructSignatures = typeHasCallOrConstructSignatures;
    function forSomeAncestorDirectory(directory, callback) {
        return !!forEachAncestorDirectory(directory, function (d) { return callback(d) ? true : undefined; });
    }
    ts.forSomeAncestorDirectory = forSomeAncestorDirectory;
    function isUMDExportSymbol(symbol) {
        return symbol && symbol.declarations && symbol.declarations[0] && ts.isNamespaceExportDeclaration(symbol.declarations[0]);
    }
    ts.isUMDExportSymbol = isUMDExportSymbol;
    function showModuleSpecifier(_a) {
        var moduleSpecifier = _a.moduleSpecifier;
        return ts.isStringLiteral(moduleSpecifier) ? moduleSpecifier.text : getTextOfNode(moduleSpecifier);
    }
    ts.showModuleSpecifier = showModuleSpecifier;
    function getLastChild(node) {
        var lastChild;
        ts.forEachChild(node, function (child) {
            if (nodeIsPresent(child))
                lastChild = child;
        }, function (children) {
            // As an optimization, jump straight to the end of the list.
            for (var i = children.length - 1; i >= 0; i--) {
                if (nodeIsPresent(children[i])) {
                    lastChild = children[i];
                    break;
                }
            }
        });
        return lastChild;
    }
    ts.getLastChild = getLastChild;
    function addToSeen(seen, key, value) {
        if (value === void 0) { value = true; }
        key = String(key);
        if (seen.has(key)) {
            return false;
        }
        seen.set(key, value);
        return true;
    }
    ts.addToSeen = addToSeen;
    function isObjectTypeDeclaration(node) {
        return ts.isClassLike(node) || ts.isInterfaceDeclaration(node) || ts.isTypeLiteralNode(node);
    }
    ts.isObjectTypeDeclaration = isObjectTypeDeclaration;
})(ts || (ts = {}));
(function (ts) {
    function getDefaultLibFileName(options) {
        switch (options.target) {
            case 6 /* ESNext */:
                return "lib.esnext.full.d.ts";
            case 4 /* ES2017 */:
                return "lib.es2017.full.d.ts";
            case 3 /* ES2016 */:
                return "lib.es2016.full.d.ts";
            case 2 /* ES2015 */:
                return "lib.es6.d.ts"; // We don't use lib.es2015.full.d.ts due to breaking change.
            default:
                return "lib.d.ts";
        }
    }
    ts.getDefaultLibFileName = getDefaultLibFileName;
    function textSpanEnd(span) {
        return span.start + span.length;
    }
    ts.textSpanEnd = textSpanEnd;
    function textSpanIsEmpty(span) {
        return span.length === 0;
    }
    ts.textSpanIsEmpty = textSpanIsEmpty;
    function textSpanContainsPosition(span, position) {
        return position >= span.start && position < textSpanEnd(span);
    }
    ts.textSpanContainsPosition = textSpanContainsPosition;
    // Returns true if 'span' contains 'other'.
    function textSpanContainsTextSpan(span, other) {
        return other.start >= span.start && textSpanEnd(other) <= textSpanEnd(span);
    }
    ts.textSpanContainsTextSpan = textSpanContainsTextSpan;
    function textSpanOverlapsWith(span, other) {
        return textSpanOverlap(span, other) !== undefined;
    }
    ts.textSpanOverlapsWith = textSpanOverlapsWith;
    function textSpanOverlap(span1, span2) {
        var overlap = textSpanIntersection(span1, span2);
        return overlap && overlap.length === 0 ? undefined : overlap;
    }
    ts.textSpanOverlap = textSpanOverlap;
    function textSpanIntersectsWithTextSpan(span, other) {
        return decodedTextSpanIntersectsWith(span.start, span.length, other.start, other.length);
    }
    ts.textSpanIntersectsWithTextSpan = textSpanIntersectsWithTextSpan;
    function textSpanIntersectsWith(span, start, length) {
        return decodedTextSpanIntersectsWith(span.start, span.length, start, length);
    }
    ts.textSpanIntersectsWith = textSpanIntersectsWith;
    function decodedTextSpanIntersectsWith(start1, length1, start2, length2) {
        var end1 = start1 + length1;
        var end2 = start2 + length2;
        return start2 <= end1 && end2 >= start1;
    }
    ts.decodedTextSpanIntersectsWith = decodedTextSpanIntersectsWith;
    function textSpanIntersectsWithPosition(span, position) {
        return position <= textSpanEnd(span) && position >= span.start;
    }
    ts.textSpanIntersectsWithPosition = textSpanIntersectsWithPosition;
    function textSpanIntersection(span1, span2) {
        var start = Math.max(span1.start, span2.start);
        var end = Math.min(textSpanEnd(span1), textSpanEnd(span2));
        return start <= end ? createTextSpanFromBounds(start, end) : undefined;
    }
    ts.textSpanIntersection = textSpanIntersection;
    function createTextSpan(start, length) {
        if (start < 0) {
            throw new Error("start < 0");
        }
        if (length < 0) {
            throw new Error("length < 0");
        }
        return { start: start, length: length };
    }
    ts.createTextSpan = createTextSpan;
    /* @internal */
    function createTextRange(pos, end) {
        if (end === void 0) { end = pos; }
        ts.Debug.assert(end >= pos);
        return { pos: pos, end: end };
    }
    ts.createTextRange = createTextRange;
    function createTextSpanFromBounds(start, end) {
        return createTextSpan(start, end - start);
    }
    ts.createTextSpanFromBounds = createTextSpanFromBounds;
    function textChangeRangeNewSpan(range) {
        return createTextSpan(range.span.start, range.newLength);
    }
    ts.textChangeRangeNewSpan = textChangeRangeNewSpan;
    function textChangeRangeIsUnchanged(range) {
        return textSpanIsEmpty(range.span) && range.newLength === 0;
    }
    ts.textChangeRangeIsUnchanged = textChangeRangeIsUnchanged;
    function createTextChangeRange(span, newLength) {
        if (newLength < 0) {
            throw new Error("newLength < 0");
        }
        return { span: span, newLength: newLength };
    }
    ts.createTextChangeRange = createTextChangeRange;
    ts.unchangedTextChangeRange = createTextChangeRange(createTextSpan(0, 0), 0);
    /**
     * Called to merge all the changes that occurred across several versions of a script snapshot
     * into a single change.  i.e. if a user keeps making successive edits to a script we will
     * have a text change from V1 to V2, V2 to V3, ..., Vn.
     *
     * This function will then merge those changes into a single change range valid between V1 and
     * Vn.
     */
    function collapseTextChangeRangesAcrossMultipleVersions(changes) {
        if (changes.length === 0) {
            return ts.unchangedTextChangeRange;
        }
        if (changes.length === 1) {
            return changes[0];
        }
        // We change from talking about { { oldStart, oldLength }, newLength } to { oldStart, oldEnd, newEnd }
        // as it makes things much easier to reason about.
        var change0 = changes[0];
        var oldStartN = change0.span.start;
        var oldEndN = textSpanEnd(change0.span);
        var newEndN = oldStartN + change0.newLength;
        for (var i = 1; i < changes.length; i++) {
            var nextChange = changes[i];
            // Consider the following case:
            // i.e. two edits.  The first represents the text change range { { 10, 50 }, 30 }.  i.e. The span starting
            // at 10, with length 50 is reduced to length 30.  The second represents the text change range { { 30, 30 }, 40 }.
            // i.e. the span starting at 30 with length 30 is increased to length 40.
            //
            //      0         10        20        30        40        50        60        70        80        90        100
            //      -------------------------------------------------------------------------------------------------------
            //                |                                                 /
            //                |                                            /----
            //  T1            |                                       /----
            //                |                                  /----
            //                |                             /----
            //      -------------------------------------------------------------------------------------------------------
            //                                     |                            \
            //                                     |                               \
            //   T2                                |                                 \
            //                                     |                                   \
            //                                     |                                      \
            //      -------------------------------------------------------------------------------------------------------
            //
            // Merging these turns out to not be too difficult.  First, determining the new start of the change is trivial
            // it's just the min of the old and new starts.  i.e.:
            //
            //      0         10        20        30        40        50        60        70        80        90        100
            //      ------------------------------------------------------------*------------------------------------------
            //                |                                                 /
            //                |                                            /----
            //  T1            |                                       /----
            //                |                                  /----
            //                |                             /----
            //      ----------------------------------------$-------------------$------------------------------------------
            //                .                    |                            \
            //                .                    |                               \
            //   T2           .                    |                                 \
            //                .                    |                                   \
            //                .                    |                                      \
            //      ----------------------------------------------------------------------*--------------------------------
            //
            // (Note the dots represent the newly inferred start.
            // Determining the new and old end is also pretty simple.  Basically it boils down to paying attention to the
            // absolute positions at the asterisks, and the relative change between the dollar signs. Basically, we see
            // which if the two $'s precedes the other, and we move that one forward until they line up.  in this case that
            // means:
            //
            //      0         10        20        30        40        50        60        70        80        90        100
            //      --------------------------------------------------------------------------------*----------------------
            //                |                                                                     /
            //                |                                                                /----
            //  T1            |                                                           /----
            //                |                                                      /----
            //                |                                                 /----
            //      ------------------------------------------------------------$------------------------------------------
            //                .                    |                            \
            //                .                    |                               \
            //   T2           .                    |                                 \
            //                .                    |                                   \
            //                .                    |                                      \
            //      ----------------------------------------------------------------------*--------------------------------
            //
            // In other words (in this case), we're recognizing that the second edit happened after where the first edit
            // ended with a delta of 20 characters (60 - 40).  Thus, if we go back in time to where the first edit started
            // that's the same as if we started at char 80 instead of 60.
            //
            // As it so happens, the same logic applies if the second edit precedes the first edit.  In that case rather
            // than pushing the first edit forward to match the second, we'll push the second edit forward to match the
            // first.
            //
            // In this case that means we have { oldStart: 10, oldEnd: 80, newEnd: 70 } or, in TextChangeRange
            // semantics: { { start: 10, length: 70 }, newLength: 60 }
            //
            // The math then works out as follows.
            // If we have { oldStart1, oldEnd1, newEnd1 } and { oldStart2, oldEnd2, newEnd2 } then we can compute the
            // final result like so:
            //
            // {
            //      oldStart3: Min(oldStart1, oldStart2),
            //      oldEnd3: Max(oldEnd1, oldEnd1 + (oldEnd2 - newEnd1)),
            //      newEnd3: Max(newEnd2, newEnd2 + (newEnd1 - oldEnd2))
            // }
            var oldStart1 = oldStartN;
            var oldEnd1 = oldEndN;
            var newEnd1 = newEndN;
            var oldStart2 = nextChange.span.start;
            var oldEnd2 = textSpanEnd(nextChange.span);
            var newEnd2 = oldStart2 + nextChange.newLength;
            oldStartN = Math.min(oldStart1, oldStart2);
            oldEndN = Math.max(oldEnd1, oldEnd1 + (oldEnd2 - newEnd1));
            newEndN = Math.max(newEnd2, newEnd2 + (newEnd1 - oldEnd2));
        }
        return createTextChangeRange(createTextSpanFromBounds(oldStartN, oldEndN), /*newLength*/ newEndN - oldStartN);
    }
    ts.collapseTextChangeRangesAcrossMultipleVersions = collapseTextChangeRangesAcrossMultipleVersions;
    function getTypeParameterOwner(d) {
        if (d && d.kind === 148 /* TypeParameter */) {
            for (var current = d; current; current = current.parent) {
                if (ts.isFunctionLike(current) || ts.isClassLike(current) || current.kind === 236 /* InterfaceDeclaration */) {
                    return current;
                }
            }
        }
    }
    ts.getTypeParameterOwner = getTypeParameterOwner;
    function isParameterPropertyDeclaration(node) {
        return ts.hasModifier(node, 92 /* ParameterPropertyModifier */) && node.parent.kind === 155 /* Constructor */;
    }
    ts.isParameterPropertyDeclaration = isParameterPropertyDeclaration;
    function isEmptyBindingPattern(node) {
        if (ts.isBindingPattern(node)) {
            return ts.every(node.elements, isEmptyBindingElement);
        }
        return false;
    }
    ts.isEmptyBindingPattern = isEmptyBindingPattern;
    function isEmptyBindingElement(node) {
        if (ts.isOmittedExpression(node)) {
            return true;
        }
        return isEmptyBindingPattern(node.name);
    }
    ts.isEmptyBindingElement = isEmptyBindingElement;
    function walkUpBindingElementsAndPatterns(node) {
        while (node && (node.kind === 182 /* BindingElement */ || ts.isBindingPattern(node))) {
            node = node.parent;
        }
        return node;
    }
    function getCombinedModifierFlags(node) {
        node = walkUpBindingElementsAndPatterns(node);
        var flags = ts.getModifierFlags(node);
        if (node.kind === 232 /* VariableDeclaration */) {
            node = node.parent;
        }
        if (node && node.kind === 233 /* VariableDeclarationList */) {
            flags |= ts.getModifierFlags(node);
            node = node.parent;
        }
        if (node && node.kind === 214 /* VariableStatement */) {
            flags |= ts.getModifierFlags(node);
        }
        return flags;
    }
    ts.getCombinedModifierFlags = getCombinedModifierFlags;
    // Returns the node flags for this node and all relevant parent nodes.  This is done so that
    // nodes like variable declarations and binding elements can returned a view of their flags
    // that includes the modifiers from their container.  i.e. flags like export/declare aren't
    // stored on the variable declaration directly, but on the containing variable statement
    // (if it has one).  Similarly, flags for let/const are store on the variable declaration
    // list.  By calling this function, all those flags are combined so that the client can treat
    // the node as if it actually had those flags.
    function getCombinedNodeFlags(node) {
        node = walkUpBindingElementsAndPatterns(node);
        var flags = node.flags;
        if (node.kind === 232 /* VariableDeclaration */) {
            node = node.parent;
        }
        if (node && node.kind === 233 /* VariableDeclarationList */) {
            flags |= node.flags;
            node = node.parent;
        }
        if (node && node.kind === 214 /* VariableStatement */) {
            flags |= node.flags;
        }
        return flags;
    }
    ts.getCombinedNodeFlags = getCombinedNodeFlags;
    /**
     * Checks to see if the locale is in the appropriate format,
     * and if it is, attempts to set the appropriate language.
     */
    function validateLocaleAndSetLanguage(locale, sys, errors) {
        var matchResult = /^([a-z]+)([_\-]([a-z]+))?$/.exec(locale.toLowerCase());
        if (!matchResult) {
            if (errors) {
                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1, "en", "ja-jp"));
            }
            return;
        }
        var language = matchResult[1];
        var territory = matchResult[3];
        // First try the entire locale, then fall back to just language if that's all we have.
        // Either ways do not fail, and fallback to the English diagnostic strings.
        if (!trySetLanguageAndTerritory(language, territory, errors)) {
            trySetLanguageAndTerritory(language, /*territory*/ undefined, errors);
        }
        // Set the UI locale for string collation
        ts.setUILocale(locale);
        function trySetLanguageAndTerritory(language, territory, errors) {
            var compilerFilePath = ts.normalizePath(sys.getExecutingFilePath());
            var containingDirectoryPath = ts.getDirectoryPath(compilerFilePath);
            var filePath = ts.combinePaths(containingDirectoryPath, language);
            if (territory) {
                filePath = filePath + "-" + territory;
            }
            filePath = sys.resolvePath(ts.combinePaths(filePath, "diagnosticMessages.generated.json"));
            if (!sys.fileExists(filePath)) {
                return false;
            }
            // TODO: Add codePage support for readFile?
            var fileContents = "";
            try {
                fileContents = sys.readFile(filePath);
            }
            catch (e) {
                if (errors) {
                    errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unable_to_open_file_0, filePath));
                }
                return false;
            }
            try {
                // tslint:disable-next-line no-unnecessary-qualifier (making clear this is a global mutation!)
                ts.localizedDiagnosticMessages = JSON.parse(fileContents);
            }
            catch (_a) {
                if (errors) {
                    errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Corrupted_locale_file_0, filePath));
                }
                return false;
            }
            return true;
        }
    }
    ts.validateLocaleAndSetLanguage = validateLocaleAndSetLanguage;
    function getOriginalNode(node, nodeTest) {
        if (node) {
            while (node.original !== undefined) {
                node = node.original;
            }
        }
        return !nodeTest || nodeTest(node) ? node : undefined;
    }
    ts.getOriginalNode = getOriginalNode;
    /**
     * Gets a value indicating whether a node originated in the parse tree.
     *
     * @param node The node to test.
     */
    function isParseTreeNode(node) {
        return (node.flags & 8 /* Synthesized */) === 0;
    }
    ts.isParseTreeNode = isParseTreeNode;
    function getParseTreeNode(node, nodeTest) {
        if (node === undefined || isParseTreeNode(node)) {
            return node;
        }
        node = getOriginalNode(node);
        if (isParseTreeNode(node) && (!nodeTest || nodeTest(node))) {
            return node;
        }
        return undefined;
    }
    ts.getParseTreeNode = getParseTreeNode;
    /**
     * Remove extra underscore from escaped identifier text content.
     *
     * @param identifier The escaped identifier text.
     * @returns The unescaped identifier text.
     */
    function unescapeLeadingUnderscores(identifier) {
        var id = identifier;
        return id.length >= 3 && id.charCodeAt(0) === 95 /* _ */ && id.charCodeAt(1) === 95 /* _ */ && id.charCodeAt(2) === 95 /* _ */ ? id.substr(1) : id;
    }
    ts.unescapeLeadingUnderscores = unescapeLeadingUnderscores;
    function idText(identifier) {
        return unescapeLeadingUnderscores(identifier.escapedText);
    }
    ts.idText = idText;
    function symbolName(symbol) {
        return unescapeLeadingUnderscores(symbol.escapedName);
    }
    ts.symbolName = symbolName;
    /**
     * Remove extra underscore from escaped identifier text content.
     * @deprecated Use `id.text` for the unescaped text.
     * @param identifier The escaped identifier text.
     * @returns The unescaped identifier text.
     */
    function unescapeIdentifier(id) {
        return id;
    }
    ts.unescapeIdentifier = unescapeIdentifier;
    /**
     * A JSDocTypedef tag has an _optional_ name field - if a name is not directly present, we should
     * attempt to draw the name from the node the declaration is on (as that declaration is what its' symbol
     * will be merged with)
     */
    function nameForNamelessJSDocTypedef(declaration) {
        var hostNode = declaration.parent.parent;
        if (!hostNode) {
            return undefined;
        }
        // Covers classes, functions - any named declaration host node
        if (ts.isDeclaration(hostNode)) {
            return getDeclarationIdentifier(hostNode);
        }
        // Covers remaining cases
        switch (hostNode.kind) {
            case 214 /* VariableStatement */:
                if (hostNode.declarationList && hostNode.declarationList.declarations[0]) {
                    return getDeclarationIdentifier(hostNode.declarationList.declarations[0]);
                }
                return undefined;
            case 216 /* ExpressionStatement */:
                var expr = hostNode.expression;
                switch (expr.kind) {
                    case 185 /* PropertyAccessExpression */:
                        return expr.name;
                    case 186 /* ElementAccessExpression */:
                        var arg = expr.argumentExpression;
                        if (ts.isIdentifier(arg)) {
                            return arg;
                        }
                }
                return undefined;
            case 1 /* EndOfFileToken */:
                return undefined;
            case 191 /* ParenthesizedExpression */: {
                return getDeclarationIdentifier(hostNode.expression);
            }
            case 228 /* LabeledStatement */: {
                if (ts.isDeclaration(hostNode.statement) || ts.isExpression(hostNode.statement)) {
                    return getDeclarationIdentifier(hostNode.statement);
                }
                return undefined;
            }
            default:
                ts.Debug.assertNever(hostNode, "Found typedef tag attached to node which it should not be!");
        }
    }
    function getDeclarationIdentifier(node) {
        var name = getNameOfDeclaration(node);
        return ts.isIdentifier(name) ? name : undefined;
    }
    function getNameOfJSDocTypedef(declaration) {
        return declaration.name || nameForNamelessJSDocTypedef(declaration);
    }
    ts.getNameOfJSDocTypedef = getNameOfJSDocTypedef;
    /** @internal */
    function isNamedDeclaration(node) {
        return !!node.name; // A 'name' property should always be a DeclarationName.
    }
    ts.isNamedDeclaration = isNamedDeclaration;
    // TODO: GH#18217 This is often used as if it returns a defined result
    function getNameOfDeclaration(declaration) {
        if (!declaration) {
            return undefined;
        }
        switch (declaration.kind) {
            case 205 /* ClassExpression */:
            case 192 /* FunctionExpression */:
                if (!declaration.name) {
                    return getAssignedName(declaration);
                }
                break;
            case 71 /* Identifier */:
                return declaration;
            case 298 /* JSDocPropertyTag */:
            case 293 /* JSDocParameterTag */: {
                var name = declaration.name;
                if (name.kind === 146 /* QualifiedName */) {
                    return name.right;
                }
                break;
            }
            case 200 /* BinaryExpression */: {
                var expr = declaration;
                switch (ts.getSpecialPropertyAssignmentKind(expr)) {
                    case 1 /* ExportsProperty */:
                    case 4 /* ThisProperty */:
                    case 5 /* Property */:
                    case 3 /* PrototypeProperty */:
                        return expr.left.name;
                    default:
                        return undefined;
                }
            }
            case 292 /* JSDocCallbackTag */:
                return declaration.name;
            case 297 /* JSDocTypedefTag */:
                return getNameOfJSDocTypedef(declaration);
            case 249 /* ExportAssignment */: {
                var expression = declaration.expression;
                return ts.isIdentifier(expression) ? expression : undefined;
            }
        }
        return declaration.name;
    }
    ts.getNameOfDeclaration = getNameOfDeclaration;
    function getAssignedName(node) {
        if (!node.parent) {
            return undefined;
        }
        else if (ts.isPropertyAssignment(node.parent) || ts.isBindingElement(node.parent)) {
            return node.parent.name;
        }
        else if (ts.isBinaryExpression(node.parent) && node === node.parent.right) {
            if (ts.isIdentifier(node.parent.left)) {
                return node.parent.left;
            }
            else if (ts.isPropertyAccessExpression(node.parent.left)) {
                return node.parent.left.name;
            }
        }
    }
    /**
     * Gets the JSDoc parameter tags for the node if present.
     *
     * @remarks Returns any JSDoc param tag that matches the provided
     * parameter, whether a param tag on a containing function
     * expression, or a param tag on a variable declaration whose
     * initializer is the containing function. The tags closest to the
     * node are returned first, so in the previous example, the param
     * tag on the containing function expression would be first.
     *
     * Does not return tags for binding patterns, because JSDoc matches
     * parameters by name and binding patterns do not have a name.
     */
    function getJSDocParameterTags(param) {
        if (param.name) {
            if (ts.isIdentifier(param.name)) {
                var name_1 = param.name.escapedText;
                return getJSDocTags(param.parent).filter(function (tag) { return ts.isJSDocParameterTag(tag) && ts.isIdentifier(tag.name) && tag.name.escapedText === name_1; });
            }
            else {
                var i = param.parent.parameters.indexOf(param);
                ts.Debug.assert(i > -1, "Parameters should always be in their parents' parameter list");
                var paramTags = getJSDocTags(param.parent).filter(ts.isJSDocParameterTag);
                if (i < paramTags.length) {
                    return [paramTags[i]];
                }
            }
        }
        // return empty array for: out-of-order binding patterns and JSDoc function syntax, which has un-named parameters
        return ts.emptyArray;
    }
    ts.getJSDocParameterTags = getJSDocParameterTags;
    /**
     * Return true if the node has JSDoc parameter tags.
     *
     * @remarks Includes parameter tags that are not directly on the node,
     * for example on a variable declaration whose initializer is a function expression.
     */
    function hasJSDocParameterTags(node) {
        return !!getFirstJSDocTag(node, ts.isJSDocParameterTag);
    }
    ts.hasJSDocParameterTags = hasJSDocParameterTags;
    /** Gets the JSDoc augments tag for the node if present */
    function getJSDocAugmentsTag(node) {
        return getFirstJSDocTag(node, ts.isJSDocAugmentsTag);
    }
    ts.getJSDocAugmentsTag = getJSDocAugmentsTag;
    /** Gets the JSDoc class tag for the node if present */
    function getJSDocClassTag(node) {
        return getFirstJSDocTag(node, ts.isJSDocClassTag);
    }
    ts.getJSDocClassTag = getJSDocClassTag;
    /** Gets the JSDoc return tag for the node if present */
    function getJSDocReturnTag(node) {
        return getFirstJSDocTag(node, ts.isJSDocReturnTag);
    }
    ts.getJSDocReturnTag = getJSDocReturnTag;
    /** Gets the JSDoc template tag for the node if present */
    function getJSDocTemplateTag(node) {
        return getFirstJSDocTag(node, ts.isJSDocTemplateTag);
    }
    ts.getJSDocTemplateTag = getJSDocTemplateTag;
    /** Gets the JSDoc type tag for the node if present and valid */
    function getJSDocTypeTag(node) {
        // We should have already issued an error if there were multiple type jsdocs, so just use the first one.
        var tag = getFirstJSDocTag(node, ts.isJSDocTypeTag);
        if (tag && tag.typeExpression && tag.typeExpression.type) {
            return tag;
        }
        return undefined;
    }
    ts.getJSDocTypeTag = getJSDocTypeTag;
    /**
     * Gets the type node for the node if provided via JSDoc.
     *
     * @remarks The search includes any JSDoc param tag that relates
     * to the provided parameter, for example a type tag on the
     * parameter itself, or a param tag on a containing function
     * expression, or a param tag on a variable declaration whose
     * initializer is the containing function. The tags closest to the
     * node are examined first, so in the previous example, the type
     * tag directly on the node would be returned.
     */
    function getJSDocType(node) {
        var tag = getFirstJSDocTag(node, ts.isJSDocTypeTag);
        if (!tag && ts.isParameter(node)) {
            tag = ts.find(getJSDocParameterTags(node), function (tag) { return !!tag.typeExpression; });
        }
        return tag && tag.typeExpression && tag.typeExpression.type;
    }
    ts.getJSDocType = getJSDocType;
    /**
     * Gets the return type node for the node if provided via JSDoc's return tag.
     *
     * @remarks `getJSDocReturnTag` just gets the whole JSDoc tag. This function
     * gets the type from inside the braces.
     */
    function getJSDocReturnType(node) {
        var returnTag = getJSDocReturnTag(node);
        return returnTag && returnTag.typeExpression && returnTag.typeExpression.type;
    }
    ts.getJSDocReturnType = getJSDocReturnType;
    /** Get all JSDoc tags related to a node, including those on parent nodes. */
    function getJSDocTags(node) {
        var tags = node.jsDocCache;
        // If cache is 'null', that means we did the work of searching for JSDoc tags and came up with nothing.
        if (tags === undefined) {
            var comments = ts.getJSDocCommentsAndTags(node);
            ts.Debug.assert(comments.length < 2 || comments[0] !== comments[1]);
            node.jsDocCache = tags = ts.flatMap(comments, function (j) { return ts.isJSDoc(j) ? j.tags : j; });
        }
        return tags;
    }
    ts.getJSDocTags = getJSDocTags;
    /** Get the first JSDoc tag of a specified kind, or undefined if not present. */
    function getFirstJSDocTag(node, predicate) {
        return ts.find(getJSDocTags(node), predicate);
    }
    /** Gets all JSDoc tags of a specified kind, or undefined if not present. */
    function getAllJSDocTagsOfKind(node, kind) {
        return getJSDocTags(node).filter(function (doc) { return doc.kind === kind; });
    }
    ts.getAllJSDocTagsOfKind = getAllJSDocTagsOfKind;
})(ts || (ts = {}));
// Simple node tests of the form `node.kind === SyntaxKind.Foo`.
(function (ts) {
    // Literals
    function isNumericLiteral(node) {
        return node.kind === 8 /* NumericLiteral */;
    }
    ts.isNumericLiteral = isNumericLiteral;
    function isStringLiteral(node) {
        return node.kind === 9 /* StringLiteral */;
    }
    ts.isStringLiteral = isStringLiteral;
    function isJsxText(node) {
        return node.kind === 10 /* JsxText */;
    }
    ts.isJsxText = isJsxText;
    function isRegularExpressionLiteral(node) {
        return node.kind === 12 /* RegularExpressionLiteral */;
    }
    ts.isRegularExpressionLiteral = isRegularExpressionLiteral;
    function isNoSubstitutionTemplateLiteral(node) {
        return node.kind === 13 /* NoSubstitutionTemplateLiteral */;
    }
    ts.isNoSubstitutionTemplateLiteral = isNoSubstitutionTemplateLiteral;
    // Pseudo-literals
    function isTemplateHead(node) {
        return node.kind === 14 /* TemplateHead */;
    }
    ts.isTemplateHead = isTemplateHead;
    function isTemplateMiddle(node) {
        return node.kind === 15 /* TemplateMiddle */;
    }
    ts.isTemplateMiddle = isTemplateMiddle;
    function isTemplateTail(node) {
        return node.kind === 16 /* TemplateTail */;
    }
    ts.isTemplateTail = isTemplateTail;
    function isIdentifier(node) {
        return node.kind === 71 /* Identifier */;
    }
    ts.isIdentifier = isIdentifier;
    // Names
    function isQualifiedName(node) {
        return node.kind === 146 /* QualifiedName */;
    }
    ts.isQualifiedName = isQualifiedName;
    function isComputedPropertyName(node) {
        return node.kind === 147 /* ComputedPropertyName */;
    }
    ts.isComputedPropertyName = isComputedPropertyName;
    // Signature elements
    function isTypeParameterDeclaration(node) {
        return node.kind === 148 /* TypeParameter */;
    }
    ts.isTypeParameterDeclaration = isTypeParameterDeclaration;
    function isParameter(node) {
        return node.kind === 149 /* Parameter */;
    }
    ts.isParameter = isParameter;
    function isDecorator(node) {
        return node.kind === 150 /* Decorator */;
    }
    ts.isDecorator = isDecorator;
    // TypeMember
    function isPropertySignature(node) {
        return node.kind === 151 /* PropertySignature */;
    }
    ts.isPropertySignature = isPropertySignature;
    function isPropertyDeclaration(node) {
        return node.kind === 152 /* PropertyDeclaration */;
    }
    ts.isPropertyDeclaration = isPropertyDeclaration;
    function isMethodSignature(node) {
        return node.kind === 153 /* MethodSignature */;
    }
    ts.isMethodSignature = isMethodSignature;
    function isMethodDeclaration(node) {
        return node.kind === 154 /* MethodDeclaration */;
    }
    ts.isMethodDeclaration = isMethodDeclaration;
    function isConstructorDeclaration(node) {
        return node.kind === 155 /* Constructor */;
    }
    ts.isConstructorDeclaration = isConstructorDeclaration;
    function isGetAccessorDeclaration(node) {
        return node.kind === 156 /* GetAccessor */;
    }
    ts.isGetAccessorDeclaration = isGetAccessorDeclaration;
    function isSetAccessorDeclaration(node) {
        return node.kind === 157 /* SetAccessor */;
    }
    ts.isSetAccessorDeclaration = isSetAccessorDeclaration;
    function isCallSignatureDeclaration(node) {
        return node.kind === 158 /* CallSignature */;
    }
    ts.isCallSignatureDeclaration = isCallSignatureDeclaration;
    function isConstructSignatureDeclaration(node) {
        return node.kind === 159 /* ConstructSignature */;
    }
    ts.isConstructSignatureDeclaration = isConstructSignatureDeclaration;
    function isIndexSignatureDeclaration(node) {
        return node.kind === 160 /* IndexSignature */;
    }
    ts.isIndexSignatureDeclaration = isIndexSignatureDeclaration;
    /* @internal */
    function isGetOrSetAccessorDeclaration(node) {
        return node.kind === 157 /* SetAccessor */ || node.kind === 156 /* GetAccessor */;
    }
    ts.isGetOrSetAccessorDeclaration = isGetOrSetAccessorDeclaration;
    // Type
    function isTypePredicateNode(node) {
        return node.kind === 161 /* TypePredicate */;
    }
    ts.isTypePredicateNode = isTypePredicateNode;
    function isTypeReferenceNode(node) {
        return node.kind === 162 /* TypeReference */;
    }
    ts.isTypeReferenceNode = isTypeReferenceNode;
    function isFunctionTypeNode(node) {
        return node.kind === 163 /* FunctionType */;
    }
    ts.isFunctionTypeNode = isFunctionTypeNode;
    function isConstructorTypeNode(node) {
        return node.kind === 164 /* ConstructorType */;
    }
    ts.isConstructorTypeNode = isConstructorTypeNode;
    function isTypeQueryNode(node) {
        return node.kind === 165 /* TypeQuery */;
    }
    ts.isTypeQueryNode = isTypeQueryNode;
    function isTypeLiteralNode(node) {
        return node.kind === 166 /* TypeLiteral */;
    }
    ts.isTypeLiteralNode = isTypeLiteralNode;
    function isArrayTypeNode(node) {
        return node.kind === 167 /* ArrayType */;
    }
    ts.isArrayTypeNode = isArrayTypeNode;
    function isTupleTypeNode(node) {
        return node.kind === 168 /* TupleType */;
    }
    ts.isTupleTypeNode = isTupleTypeNode;
    function isUnionTypeNode(node) {
        return node.kind === 169 /* UnionType */;
    }
    ts.isUnionTypeNode = isUnionTypeNode;
    function isIntersectionTypeNode(node) {
        return node.kind === 170 /* IntersectionType */;
    }
    ts.isIntersectionTypeNode = isIntersectionTypeNode;
    function isConditionalTypeNode(node) {
        return node.kind === 171 /* ConditionalType */;
    }
    ts.isConditionalTypeNode = isConditionalTypeNode;
    function isInferTypeNode(node) {
        return node.kind === 172 /* InferType */;
    }
    ts.isInferTypeNode = isInferTypeNode;
    function isParenthesizedTypeNode(node) {
        return node.kind === 173 /* ParenthesizedType */;
    }
    ts.isParenthesizedTypeNode = isParenthesizedTypeNode;
    function isThisTypeNode(node) {
        return node.kind === 174 /* ThisType */;
    }
    ts.isThisTypeNode = isThisTypeNode;
    function isTypeOperatorNode(node) {
        return node.kind === 175 /* TypeOperator */;
    }
    ts.isTypeOperatorNode = isTypeOperatorNode;
    function isIndexedAccessTypeNode(node) {
        return node.kind === 176 /* IndexedAccessType */;
    }
    ts.isIndexedAccessTypeNode = isIndexedAccessTypeNode;
    function isMappedTypeNode(node) {
        return node.kind === 177 /* MappedType */;
    }
    ts.isMappedTypeNode = isMappedTypeNode;
    function isLiteralTypeNode(node) {
        return node.kind === 178 /* LiteralType */;
    }
    ts.isLiteralTypeNode = isLiteralTypeNode;
    function isImportTypeNode(node) {
        return node.kind === 179 /* ImportType */;
    }
    ts.isImportTypeNode = isImportTypeNode;
    // Binding patterns
    function isObjectBindingPattern(node) {
        return node.kind === 180 /* ObjectBindingPattern */;
    }
    ts.isObjectBindingPattern = isObjectBindingPattern;
    function isArrayBindingPattern(node) {
        return node.kind === 181 /* ArrayBindingPattern */;
    }
    ts.isArrayBindingPattern = isArrayBindingPattern;
    function isBindingElement(node) {
        return node.kind === 182 /* BindingElement */;
    }
    ts.isBindingElement = isBindingElement;
    // Expression
    function isArrayLiteralExpression(node) {
        return node.kind === 183 /* ArrayLiteralExpression */;
    }
    ts.isArrayLiteralExpression = isArrayLiteralExpression;
    function isObjectLiteralExpression(node) {
        return node.kind === 184 /* ObjectLiteralExpression */;
    }
    ts.isObjectLiteralExpression = isObjectLiteralExpression;
    function isPropertyAccessExpression(node) {
        return node.kind === 185 /* PropertyAccessExpression */;
    }
    ts.isPropertyAccessExpression = isPropertyAccessExpression;
    function isElementAccessExpression(node) {
        return node.kind === 186 /* ElementAccessExpression */;
    }
    ts.isElementAccessExpression = isElementAccessExpression;
    function isCallExpression(node) {
        return node.kind === 187 /* CallExpression */;
    }
    ts.isCallExpression = isCallExpression;
    function isNewExpression(node) {
        return node.kind === 188 /* NewExpression */;
    }
    ts.isNewExpression = isNewExpression;
    function isTaggedTemplateExpression(node) {
        return node.kind === 189 /* TaggedTemplateExpression */;
    }
    ts.isTaggedTemplateExpression = isTaggedTemplateExpression;
    function isTypeAssertion(node) {
        return node.kind === 190 /* TypeAssertionExpression */;
    }
    ts.isTypeAssertion = isTypeAssertion;
    function isParenthesizedExpression(node) {
        return node.kind === 191 /* ParenthesizedExpression */;
    }
    ts.isParenthesizedExpression = isParenthesizedExpression;
    function skipPartiallyEmittedExpressions(node) {
        while (node.kind === 301 /* PartiallyEmittedExpression */) {
            node = node.expression;
        }
        return node;
    }
    ts.skipPartiallyEmittedExpressions = skipPartiallyEmittedExpressions;
    function isFunctionExpression(node) {
        return node.kind === 192 /* FunctionExpression */;
    }
    ts.isFunctionExpression = isFunctionExpression;
    function isArrowFunction(node) {
        return node.kind === 193 /* ArrowFunction */;
    }
    ts.isArrowFunction = isArrowFunction;
    function isDeleteExpression(node) {
        return node.kind === 194 /* DeleteExpression */;
    }
    ts.isDeleteExpression = isDeleteExpression;
    function isTypeOfExpression(node) {
        return node.kind === 195 /* TypeOfExpression */;
    }
    ts.isTypeOfExpression = isTypeOfExpression;
    function isVoidExpression(node) {
        return node.kind === 196 /* VoidExpression */;
    }
    ts.isVoidExpression = isVoidExpression;
    function isAwaitExpression(node) {
        return node.kind === 197 /* AwaitExpression */;
    }
    ts.isAwaitExpression = isAwaitExpression;
    function isPrefixUnaryExpression(node) {
        return node.kind === 198 /* PrefixUnaryExpression */;
    }
    ts.isPrefixUnaryExpression = isPrefixUnaryExpression;
    function isPostfixUnaryExpression(node) {
        return node.kind === 199 /* PostfixUnaryExpression */;
    }
    ts.isPostfixUnaryExpression = isPostfixUnaryExpression;
    function isBinaryExpression(node) {
        return node.kind === 200 /* BinaryExpression */;
    }
    ts.isBinaryExpression = isBinaryExpression;
    function isConditionalExpression(node) {
        return node.kind === 201 /* ConditionalExpression */;
    }
    ts.isConditionalExpression = isConditionalExpression;
    function isTemplateExpression(node) {
        return node.kind === 202 /* TemplateExpression */;
    }
    ts.isTemplateExpression = isTemplateExpression;
    function isYieldExpression(node) {
        return node.kind === 203 /* YieldExpression */;
    }
    ts.isYieldExpression = isYieldExpression;
    function isSpreadElement(node) {
        return node.kind === 204 /* SpreadElement */;
    }
    ts.isSpreadElement = isSpreadElement;
    function isClassExpression(node) {
        return node.kind === 205 /* ClassExpression */;
    }
    ts.isClassExpression = isClassExpression;
    function isOmittedExpression(node) {
        return node.kind === 206 /* OmittedExpression */;
    }
    ts.isOmittedExpression = isOmittedExpression;
    function isExpressionWithTypeArguments(node) {
        return node.kind === 207 /* ExpressionWithTypeArguments */;
    }
    ts.isExpressionWithTypeArguments = isExpressionWithTypeArguments;
    function isAsExpression(node) {
        return node.kind === 208 /* AsExpression */;
    }
    ts.isAsExpression = isAsExpression;
    function isNonNullExpression(node) {
        return node.kind === 209 /* NonNullExpression */;
    }
    ts.isNonNullExpression = isNonNullExpression;
    function isMetaProperty(node) {
        return node.kind === 210 /* MetaProperty */;
    }
    ts.isMetaProperty = isMetaProperty;
    // Misc
    function isTemplateSpan(node) {
        return node.kind === 211 /* TemplateSpan */;
    }
    ts.isTemplateSpan = isTemplateSpan;
    function isSemicolonClassElement(node) {
        return node.kind === 212 /* SemicolonClassElement */;
    }
    ts.isSemicolonClassElement = isSemicolonClassElement;
    // Block
    function isBlock(node) {
        return node.kind === 213 /* Block */;
    }
    ts.isBlock = isBlock;
    function isVariableStatement(node) {
        return node.kind === 214 /* VariableStatement */;
    }
    ts.isVariableStatement = isVariableStatement;
    function isEmptyStatement(node) {
        return node.kind === 215 /* EmptyStatement */;
    }
    ts.isEmptyStatement = isEmptyStatement;
    function isExpressionStatement(node) {
        return node.kind === 216 /* ExpressionStatement */;
    }
    ts.isExpressionStatement = isExpressionStatement;
    function isIfStatement(node) {
        return node.kind === 217 /* IfStatement */;
    }
    ts.isIfStatement = isIfStatement;
    function isDoStatement(node) {
        return node.kind === 218 /* DoStatement */;
    }
    ts.isDoStatement = isDoStatement;
    function isWhileStatement(node) {
        return node.kind === 219 /* WhileStatement */;
    }
    ts.isWhileStatement = isWhileStatement;
    function isForStatement(node) {
        return node.kind === 220 /* ForStatement */;
    }
    ts.isForStatement = isForStatement;
    function isForInStatement(node) {
        return node.kind === 221 /* ForInStatement */;
    }
    ts.isForInStatement = isForInStatement;
    function isForOfStatement(node) {
        return node.kind === 222 /* ForOfStatement */;
    }
    ts.isForOfStatement = isForOfStatement;
    function isContinueStatement(node) {
        return node.kind === 223 /* ContinueStatement */;
    }
    ts.isContinueStatement = isContinueStatement;
    function isBreakStatement(node) {
        return node.kind === 224 /* BreakStatement */;
    }
    ts.isBreakStatement = isBreakStatement;
    function isBreakOrContinueStatement(node) {
        return node.kind === 224 /* BreakStatement */ || node.kind === 223 /* ContinueStatement */;
    }
    ts.isBreakOrContinueStatement = isBreakOrContinueStatement;
    function isReturnStatement(node) {
        return node.kind === 225 /* ReturnStatement */;
    }
    ts.isReturnStatement = isReturnStatement;
    function isWithStatement(node) {
        return node.kind === 226 /* WithStatement */;
    }
    ts.isWithStatement = isWithStatement;
    function isSwitchStatement(node) {
        return node.kind === 227 /* SwitchStatement */;
    }
    ts.isSwitchStatement = isSwitchStatement;
    function isLabeledStatement(node) {
        return node.kind === 228 /* LabeledStatement */;
    }
    ts.isLabeledStatement = isLabeledStatement;
    function isThrowStatement(node) {
        return node.kind === 229 /* ThrowStatement */;
    }
    ts.isThrowStatement = isThrowStatement;
    function isTryStatement(node) {
        return node.kind === 230 /* TryStatement */;
    }
    ts.isTryStatement = isTryStatement;
    function isDebuggerStatement(node) {
        return node.kind === 231 /* DebuggerStatement */;
    }
    ts.isDebuggerStatement = isDebuggerStatement;
    function isVariableDeclaration(node) {
        return node.kind === 232 /* VariableDeclaration */;
    }
    ts.isVariableDeclaration = isVariableDeclaration;
    function isVariableDeclarationList(node) {
        return node.kind === 233 /* VariableDeclarationList */;
    }
    ts.isVariableDeclarationList = isVariableDeclarationList;
    function isFunctionDeclaration(node) {
        return node.kind === 234 /* FunctionDeclaration */;
    }
    ts.isFunctionDeclaration = isFunctionDeclaration;
    function isClassDeclaration(node) {
        return node.kind === 235 /* ClassDeclaration */;
    }
    ts.isClassDeclaration = isClassDeclaration;
    function isInterfaceDeclaration(node) {
        return node.kind === 236 /* InterfaceDeclaration */;
    }
    ts.isInterfaceDeclaration = isInterfaceDeclaration;
    function isTypeAliasDeclaration(node) {
        return node.kind === 237 /* TypeAliasDeclaration */;
    }
    ts.isTypeAliasDeclaration = isTypeAliasDeclaration;
    function isEnumDeclaration(node) {
        return node.kind === 238 /* EnumDeclaration */;
    }
    ts.isEnumDeclaration = isEnumDeclaration;
    function isModuleDeclaration(node) {
        return node.kind === 239 /* ModuleDeclaration */;
    }
    ts.isModuleDeclaration = isModuleDeclaration;
    function isModuleBlock(node) {
        return node.kind === 240 /* ModuleBlock */;
    }
    ts.isModuleBlock = isModuleBlock;
    function isCaseBlock(node) {
        return node.kind === 241 /* CaseBlock */;
    }
    ts.isCaseBlock = isCaseBlock;
    function isNamespaceExportDeclaration(node) {
        return node.kind === 242 /* NamespaceExportDeclaration */;
    }
    ts.isNamespaceExportDeclaration = isNamespaceExportDeclaration;
    function isImportEqualsDeclaration(node) {
        return node.kind === 243 /* ImportEqualsDeclaration */;
    }
    ts.isImportEqualsDeclaration = isImportEqualsDeclaration;
    function isImportDeclaration(node) {
        return node.kind === 244 /* ImportDeclaration */;
    }
    ts.isImportDeclaration = isImportDeclaration;
    function isImportClause(node) {
        return node.kind === 245 /* ImportClause */;
    }
    ts.isImportClause = isImportClause;
    function isNamespaceImport(node) {
        return node.kind === 246 /* NamespaceImport */;
    }
    ts.isNamespaceImport = isNamespaceImport;
    function isNamedImports(node) {
        return node.kind === 247 /* NamedImports */;
    }
    ts.isNamedImports = isNamedImports;
    function isImportSpecifier(node) {
        return node.kind === 248 /* ImportSpecifier */;
    }
    ts.isImportSpecifier = isImportSpecifier;
    function isExportAssignment(node) {
        return node.kind === 249 /* ExportAssignment */;
    }
    ts.isExportAssignment = isExportAssignment;
    function isExportDeclaration(node) {
        return node.kind === 250 /* ExportDeclaration */;
    }
    ts.isExportDeclaration = isExportDeclaration;
    function isNamedExports(node) {
        return node.kind === 251 /* NamedExports */;
    }
    ts.isNamedExports = isNamedExports;
    function isExportSpecifier(node) {
        return node.kind === 252 /* ExportSpecifier */;
    }
    ts.isExportSpecifier = isExportSpecifier;
    function isMissingDeclaration(node) {
        return node.kind === 253 /* MissingDeclaration */;
    }
    ts.isMissingDeclaration = isMissingDeclaration;
    // Module References
    function isExternalModuleReference(node) {
        return node.kind === 254 /* ExternalModuleReference */;
    }
    ts.isExternalModuleReference = isExternalModuleReference;
    // JSX
    function isJsxElement(node) {
        return node.kind === 255 /* JsxElement */;
    }
    ts.isJsxElement = isJsxElement;
    function isJsxSelfClosingElement(node) {
        return node.kind === 256 /* JsxSelfClosingElement */;
    }
    ts.isJsxSelfClosingElement = isJsxSelfClosingElement;
    function isJsxOpeningElement(node) {
        return node.kind === 257 /* JsxOpeningElement */;
    }
    ts.isJsxOpeningElement = isJsxOpeningElement;
    function isJsxClosingElement(node) {
        return node.kind === 258 /* JsxClosingElement */;
    }
    ts.isJsxClosingElement = isJsxClosingElement;
    function isJsxFragment(node) {
        return node.kind === 259 /* JsxFragment */;
    }
    ts.isJsxFragment = isJsxFragment;
    function isJsxOpeningFragment(node) {
        return node.kind === 260 /* JsxOpeningFragment */;
    }
    ts.isJsxOpeningFragment = isJsxOpeningFragment;
    function isJsxClosingFragment(node) {
        return node.kind === 261 /* JsxClosingFragment */;
    }
    ts.isJsxClosingFragment = isJsxClosingFragment;
    function isJsxAttribute(node) {
        return node.kind === 262 /* JsxAttribute */;
    }
    ts.isJsxAttribute = isJsxAttribute;
    function isJsxAttributes(node) {
        return node.kind === 263 /* JsxAttributes */;
    }
    ts.isJsxAttributes = isJsxAttributes;
    function isJsxSpreadAttribute(node) {
        return node.kind === 264 /* JsxSpreadAttribute */;
    }
    ts.isJsxSpreadAttribute = isJsxSpreadAttribute;
    function isJsxExpression(node) {
        return node.kind === 265 /* JsxExpression */;
    }
    ts.isJsxExpression = isJsxExpression;
    // Clauses
    function isCaseClause(node) {
        return node.kind === 266 /* CaseClause */;
    }
    ts.isCaseClause = isCaseClause;
    function isDefaultClause(node) {
        return node.kind === 267 /* DefaultClause */;
    }
    ts.isDefaultClause = isDefaultClause;
    function isHeritageClause(node) {
        return node.kind === 268 /* HeritageClause */;
    }
    ts.isHeritageClause = isHeritageClause;
    function isCatchClause(node) {
        return node.kind === 269 /* CatchClause */;
    }
    ts.isCatchClause = isCatchClause;
    // Property assignments
    function isPropertyAssignment(node) {
        return node.kind === 270 /* PropertyAssignment */;
    }
    ts.isPropertyAssignment = isPropertyAssignment;
    function isShorthandPropertyAssignment(node) {
        return node.kind === 271 /* ShorthandPropertyAssignment */;
    }
    ts.isShorthandPropertyAssignment = isShorthandPropertyAssignment;
    function isSpreadAssignment(node) {
        return node.kind === 272 /* SpreadAssignment */;
    }
    ts.isSpreadAssignment = isSpreadAssignment;
    // Enum
    function isEnumMember(node) {
        return node.kind === 273 /* EnumMember */;
    }
    ts.isEnumMember = isEnumMember;
    // Top-level nodes
    function isSourceFile(node) {
        return node.kind === 274 /* SourceFile */;
    }
    ts.isSourceFile = isSourceFile;
    function isBundle(node) {
        return node.kind === 275 /* Bundle */;
    }
    ts.isBundle = isBundle;
    function isUnparsedSource(node) {
        return node.kind === 276 /* UnparsedSource */;
    }
    ts.isUnparsedSource = isUnparsedSource;
    // JSDoc
    function isJSDocTypeExpression(node) {
        return node.kind === 278 /* JSDocTypeExpression */;
    }
    ts.isJSDocTypeExpression = isJSDocTypeExpression;
    function isJSDocAllType(node) {
        return node.kind === 279 /* JSDocAllType */;
    }
    ts.isJSDocAllType = isJSDocAllType;
    function isJSDocUnknownType(node) {
        return node.kind === 280 /* JSDocUnknownType */;
    }
    ts.isJSDocUnknownType = isJSDocUnknownType;
    function isJSDocNullableType(node) {
        return node.kind === 281 /* JSDocNullableType */;
    }
    ts.isJSDocNullableType = isJSDocNullableType;
    function isJSDocNonNullableType(node) {
        return node.kind === 282 /* JSDocNonNullableType */;
    }
    ts.isJSDocNonNullableType = isJSDocNonNullableType;
    function isJSDocOptionalType(node) {
        return node.kind === 283 /* JSDocOptionalType */;
    }
    ts.isJSDocOptionalType = isJSDocOptionalType;
    function isJSDocFunctionType(node) {
        return node.kind === 284 /* JSDocFunctionType */;
    }
    ts.isJSDocFunctionType = isJSDocFunctionType;
    function isJSDocVariadicType(node) {
        return node.kind === 285 /* JSDocVariadicType */;
    }
    ts.isJSDocVariadicType = isJSDocVariadicType;
    function isJSDoc(node) {
        return node.kind === 286 /* JSDocComment */;
    }
    ts.isJSDoc = isJSDoc;
    function isJSDocAugmentsTag(node) {
        return node.kind === 290 /* JSDocAugmentsTag */;
    }
    ts.isJSDocAugmentsTag = isJSDocAugmentsTag;
    function isJSDocClassTag(node) {
        return node.kind === 291 /* JSDocClassTag */;
    }
    ts.isJSDocClassTag = isJSDocClassTag;
    function isJSDocParameterTag(node) {
        return node.kind === 293 /* JSDocParameterTag */;
    }
    ts.isJSDocParameterTag = isJSDocParameterTag;
    function isJSDocReturnTag(node) {
        return node.kind === 294 /* JSDocReturnTag */;
    }
    ts.isJSDocReturnTag = isJSDocReturnTag;
    function isJSDocTypeTag(node) {
        return node.kind === 295 /* JSDocTypeTag */;
    }
    ts.isJSDocTypeTag = isJSDocTypeTag;
    function isJSDocTemplateTag(node) {
        return node.kind === 296 /* JSDocTemplateTag */;
    }
    ts.isJSDocTemplateTag = isJSDocTemplateTag;
    function isJSDocTypedefTag(node) {
        return node.kind === 297 /* JSDocTypedefTag */;
    }
    ts.isJSDocTypedefTag = isJSDocTypedefTag;
    function isJSDocPropertyTag(node) {
        return node.kind === 298 /* JSDocPropertyTag */;
    }
    ts.isJSDocPropertyTag = isJSDocPropertyTag;
    function isJSDocPropertyLikeTag(node) {
        return node.kind === 298 /* JSDocPropertyTag */ || node.kind === 293 /* JSDocParameterTag */;
    }
    ts.isJSDocPropertyLikeTag = isJSDocPropertyLikeTag;
    function isJSDocTypeLiteral(node) {
        return node.kind === 287 /* JSDocTypeLiteral */;
    }
    ts.isJSDocTypeLiteral = isJSDocTypeLiteral;
    function isJSDocCallbackTag(node) {
        return node.kind === 292 /* JSDocCallbackTag */;
    }
    ts.isJSDocCallbackTag = isJSDocCallbackTag;
    function isJSDocSignature(node) {
        return node.kind === 288 /* JSDocSignature */;
    }
    ts.isJSDocSignature = isJSDocSignature;
})(ts || (ts = {}));
// Node tests
//
// All node tests in the following list should *not* reference parent pointers so that
// they may be used with transformations.
(function (ts) {
    /* @internal */
    function isSyntaxList(n) {
        return n.kind === 299 /* SyntaxList */;
    }
    ts.isSyntaxList = isSyntaxList;
    /* @internal */
    function isNode(node) {
        return isNodeKind(node.kind);
    }
    ts.isNode = isNode;
    /* @internal */
    function isNodeKind(kind) {
        return kind >= 146 /* FirstNode */;
    }
    ts.isNodeKind = isNodeKind;
    /**
     * True if node is of some token syntax kind.
     * For example, this is true for an IfKeyword but not for an IfStatement.
     * Literals are considered tokens, except TemplateLiteral, but does include TemplateHead/Middle/Tail.
     */
    function isToken(n) {
        return n.kind >= 0 /* FirstToken */ && n.kind <= 145 /* LastToken */;
    }
    ts.isToken = isToken;
    // Node Arrays
    /* @internal */
    function isNodeArray(array) {
        return array.hasOwnProperty("pos") && array.hasOwnProperty("end");
    }
    ts.isNodeArray = isNodeArray;
    // Literals
    /* @internal */
    function isLiteralKind(kind) {
        return 8 /* FirstLiteralToken */ <= kind && kind <= 13 /* LastLiteralToken */;
    }
    ts.isLiteralKind = isLiteralKind;
    function isLiteralExpression(node) {
        return isLiteralKind(node.kind);
    }
    ts.isLiteralExpression = isLiteralExpression;
    // Pseudo-literals
    /* @internal */
    function isTemplateLiteralKind(kind) {
        return 13 /* FirstTemplateToken */ <= kind && kind <= 16 /* LastTemplateToken */;
    }
    ts.isTemplateLiteralKind = isTemplateLiteralKind;
    function isTemplateLiteralToken(node) {
        return isTemplateLiteralKind(node.kind);
    }
    ts.isTemplateLiteralToken = isTemplateLiteralToken;
    function isTemplateMiddleOrTemplateTail(node) {
        var kind = node.kind;
        return kind === 15 /* TemplateMiddle */
            || kind === 16 /* TemplateTail */;
    }
    ts.isTemplateMiddleOrTemplateTail = isTemplateMiddleOrTemplateTail;
    function isStringTextContainingNode(node) {
        return node.kind === 9 /* StringLiteral */ || isTemplateLiteralKind(node.kind);
    }
    ts.isStringTextContainingNode = isStringTextContainingNode;
    // Identifiers
    /* @internal */
    function isGeneratedIdentifier(node) {
        return ts.isIdentifier(node) && (node.autoGenerateFlags & 7 /* KindMask */) > 0 /* None */;
    }
    ts.isGeneratedIdentifier = isGeneratedIdentifier;
    // Keywords
    /* @internal */
    function isModifierKind(token) {
        switch (token) {
            case 117 /* AbstractKeyword */:
            case 120 /* AsyncKeyword */:
            case 76 /* ConstKeyword */:
            case 124 /* DeclareKeyword */:
            case 79 /* DefaultKeyword */:
            case 84 /* ExportKeyword */:
            case 114 /* PublicKeyword */:
            case 112 /* PrivateKeyword */:
            case 113 /* ProtectedKeyword */:
            case 132 /* ReadonlyKeyword */:
            case 115 /* StaticKeyword */:
                return true;
        }
        return false;
    }
    ts.isModifierKind = isModifierKind;
    /* @internal */
    function isParameterPropertyModifier(kind) {
        return !!(ts.modifierToFlag(kind) & 92 /* ParameterPropertyModifier */);
    }
    ts.isParameterPropertyModifier = isParameterPropertyModifier;
    /* @internal */
    function isClassMemberModifier(idToken) {
        return isParameterPropertyModifier(idToken) || idToken === 115 /* StaticKeyword */;
    }
    ts.isClassMemberModifier = isClassMemberModifier;
    function isModifier(node) {
        return isModifierKind(node.kind);
    }
    ts.isModifier = isModifier;
    function isEntityName(node) {
        var kind = node.kind;
        return kind === 146 /* QualifiedName */
            || kind === 71 /* Identifier */;
    }
    ts.isEntityName = isEntityName;
    function isPropertyName(node) {
        var kind = node.kind;
        return kind === 71 /* Identifier */
            || kind === 9 /* StringLiteral */
            || kind === 8 /* NumericLiteral */
            || kind === 147 /* ComputedPropertyName */;
    }
    ts.isPropertyName = isPropertyName;
    function isBindingName(node) {
        var kind = node.kind;
        return kind === 71 /* Identifier */
            || kind === 180 /* ObjectBindingPattern */
            || kind === 181 /* ArrayBindingPattern */;
    }
    ts.isBindingName = isBindingName;
    // Functions
    function isFunctionLike(node) {
        return node && isFunctionLikeKind(node.kind);
    }
    ts.isFunctionLike = isFunctionLike;
    /* @internal */
    function isFunctionLikeDeclaration(node) {
        return node && isFunctionLikeDeclarationKind(node.kind);
    }
    ts.isFunctionLikeDeclaration = isFunctionLikeDeclaration;
    function isFunctionLikeDeclarationKind(kind) {
        switch (kind) {
            case 234 /* FunctionDeclaration */:
            case 154 /* MethodDeclaration */:
            case 155 /* Constructor */:
            case 156 /* GetAccessor */:
            case 157 /* SetAccessor */:
            case 192 /* FunctionExpression */:
            case 193 /* ArrowFunction */:
                return true;
            default:
                return false;
        }
    }
    /* @internal */
    function isFunctionLikeKind(kind) {
        switch (kind) {
            case 153 /* MethodSignature */:
            case 158 /* CallSignature */:
            case 288 /* JSDocSignature */:
            case 159 /* ConstructSignature */:
            case 160 /* IndexSignature */:
            case 163 /* FunctionType */:
            case 284 /* JSDocFunctionType */:
            case 164 /* ConstructorType */:
                return true;
            default:
                return isFunctionLikeDeclarationKind(kind);
        }
    }
    ts.isFunctionLikeKind = isFunctionLikeKind;
    /* @internal */
    function isFunctionOrModuleBlock(node) {
        return ts.isSourceFile(node) || ts.isModuleBlock(node) || ts.isBlock(node) && isFunctionLike(node.parent);
    }
    ts.isFunctionOrModuleBlock = isFunctionOrModuleBlock;
    // Classes
    function isClassElement(node) {
        var kind = node.kind;
        return kind === 155 /* Constructor */
            || kind === 152 /* PropertyDeclaration */
            || kind === 154 /* MethodDeclaration */
            || kind === 156 /* GetAccessor */
            || kind === 157 /* SetAccessor */
            || kind === 160 /* IndexSignature */
            || kind === 212 /* SemicolonClassElement */;
    }
    ts.isClassElement = isClassElement;
    function isClassLike(node) {
        return node && (node.kind === 235 /* ClassDeclaration */ || node.kind === 205 /* ClassExpression */);
    }
    ts.isClassLike = isClassLike;
    function isAccessor(node) {
        return node && (node.kind === 156 /* GetAccessor */ || node.kind === 157 /* SetAccessor */);
    }
    ts.isAccessor = isAccessor;
    /* @internal */
    function isMethodOrAccessor(node) {
        switch (node.kind) {
            case 154 /* MethodDeclaration */:
            case 156 /* GetAccessor */:
            case 157 /* SetAccessor */:
                return true;
            default:
                return false;
        }
    }
    ts.isMethodOrAccessor = isMethodOrAccessor;
    // Type members
    function isTypeElement(node) {
        var kind = node.kind;
        return kind === 159 /* ConstructSignature */
            || kind === 158 /* CallSignature */
            || kind === 151 /* PropertySignature */
            || kind === 153 /* MethodSignature */
            || kind === 160 /* IndexSignature */;
    }
    ts.isTypeElement = isTypeElement;
    function isClassOrTypeElement(node) {
        return isTypeElement(node) || isClassElement(node);
    }
    ts.isClassOrTypeElement = isClassOrTypeElement;
    function isObjectLiteralElementLike(node) {
        var kind = node.kind;
        return kind === 270 /* PropertyAssignment */
            || kind === 271 /* ShorthandPropertyAssignment */
            || kind === 272 /* SpreadAssignment */
            || kind === 154 /* MethodDeclaration */
            || kind === 156 /* GetAccessor */
            || kind === 157 /* SetAccessor */;
    }
    ts.isObjectLiteralElementLike = isObjectLiteralElementLike;
    // Type
    function isTypeNodeKind(kind) {
        return (kind >= 161 /* FirstTypeNode */ && kind <= 179 /* LastTypeNode */)
            || kind === 119 /* AnyKeyword */
            || kind === 142 /* UnknownKeyword */
            || kind === 134 /* NumberKeyword */
            || kind === 135 /* ObjectKeyword */
            || kind === 122 /* BooleanKeyword */
            || kind === 137 /* StringKeyword */
            || kind === 138 /* SymbolKeyword */
            || kind === 99 /* ThisKeyword */
            || kind === 105 /* VoidKeyword */
            || kind === 140 /* UndefinedKeyword */
            || kind === 95 /* NullKeyword */
            || kind === 131 /* NeverKeyword */
            || kind === 207 /* ExpressionWithTypeArguments */
            || kind === 279 /* JSDocAllType */
            || kind === 280 /* JSDocUnknownType */
            || kind === 281 /* JSDocNullableType */
            || kind === 282 /* JSDocNonNullableType */
            || kind === 283 /* JSDocOptionalType */
            || kind === 284 /* JSDocFunctionType */
            || kind === 285 /* JSDocVariadicType */;
    }
    /**
     * Node test that determines whether a node is a valid type node.
     * This differs from the `isPartOfTypeNode` function which determines whether a node is *part*
     * of a TypeNode.
     */
    function isTypeNode(node) {
        return isTypeNodeKind(node.kind);
    }
    ts.isTypeNode = isTypeNode;
    function isFunctionOrConstructorTypeNode(node) {
        switch (node.kind) {
            case 163 /* FunctionType */:
            case 164 /* ConstructorType */:
                return true;
        }
        return false;
    }
    ts.isFunctionOrConstructorTypeNode = isFunctionOrConstructorTypeNode;
    // Binding patterns
    /* @internal */
    function isBindingPattern(node) {
        if (node) {
            var kind = node.kind;
            return kind === 181 /* ArrayBindingPattern */
                || kind === 180 /* ObjectBindingPattern */;
        }
        return false;
    }
    ts.isBindingPattern = isBindingPattern;
    /* @internal */
    function isAssignmentPattern(node) {
        var kind = node.kind;
        return kind === 183 /* ArrayLiteralExpression */
            || kind === 184 /* ObjectLiteralExpression */;
    }
    ts.isAssignmentPattern = isAssignmentPattern;
    /* @internal */
    function isArrayBindingElement(node) {
        var kind = node.kind;
        return kind === 182 /* BindingElement */
            || kind === 206 /* OmittedExpression */;
    }
    ts.isArrayBindingElement = isArrayBindingElement;
    /**
     * Determines whether the BindingOrAssignmentElement is a BindingElement-like declaration
     */
    /* @internal */
    function isDeclarationBindingElement(bindingElement) {
        switch (bindingElement.kind) {
            case 232 /* VariableDeclaration */:
            case 149 /* Parameter */:
            case 182 /* BindingElement */:
                return true;
        }
        return false;
    }
    ts.isDeclarationBindingElement = isDeclarationBindingElement;
    /**
     * Determines whether a node is a BindingOrAssignmentPattern
     */
    /* @internal */
    function isBindingOrAssignmentPattern(node) {
        return isObjectBindingOrAssignmentPattern(node)
            || isArrayBindingOrAssignmentPattern(node);
    }
    ts.isBindingOrAssignmentPattern = isBindingOrAssignmentPattern;
    /**
     * Determines whether a node is an ObjectBindingOrAssignmentPattern
     */
    /* @internal */
    function isObjectBindingOrAssignmentPattern(node) {
        switch (node.kind) {
            case 180 /* ObjectBindingPattern */:
            case 184 /* ObjectLiteralExpression */:
                return true;
        }
        return false;
    }
    ts.isObjectBindingOrAssignmentPattern = isObjectBindingOrAssignmentPattern;
    /**
     * Determines whether a node is an ArrayBindingOrAssignmentPattern
     */
    /* @internal */
    function isArrayBindingOrAssignmentPattern(node) {
        switch (node.kind) {
            case 181 /* ArrayBindingPattern */:
            case 183 /* ArrayLiteralExpression */:
                return true;
        }
        return false;
    }
    ts.isArrayBindingOrAssignmentPattern = isArrayBindingOrAssignmentPattern;
    /* @internal */
    function isPropertyAccessOrQualifiedNameOrImportTypeNode(node) {
        var kind = node.kind;
        return kind === 185 /* PropertyAccessExpression */
            || kind === 146 /* QualifiedName */
            || kind === 179 /* ImportType */;
    }
    ts.isPropertyAccessOrQualifiedNameOrImportTypeNode = isPropertyAccessOrQualifiedNameOrImportTypeNode;
    // Expression
    function isPropertyAccessOrQualifiedName(node) {
        var kind = node.kind;
        return kind === 185 /* PropertyAccessExpression */
            || kind === 146 /* QualifiedName */;
    }
    ts.isPropertyAccessOrQualifiedName = isPropertyAccessOrQualifiedName;
    function isCallLikeExpression(node) {
        switch (node.kind) {
            case 257 /* JsxOpeningElement */:
            case 256 /* JsxSelfClosingElement */:
            case 187 /* CallExpression */:
            case 188 /* NewExpression */:
            case 189 /* TaggedTemplateExpression */:
            case 150 /* Decorator */:
                return true;
            default:
                return false;
        }
    }
    ts.isCallLikeExpression = isCallLikeExpression;
    function isCallOrNewExpression(node) {
        return node.kind === 187 /* CallExpression */ || node.kind === 188 /* NewExpression */;
    }
    ts.isCallOrNewExpression = isCallOrNewExpression;
    function isTemplateLiteral(node) {
        var kind = node.kind;
        return kind === 202 /* TemplateExpression */
            || kind === 13 /* NoSubstitutionTemplateLiteral */;
    }
    ts.isTemplateLiteral = isTemplateLiteral;
    /* @internal */
    function isLeftHandSideExpression(node) {
        return isLeftHandSideExpressionKind(ts.skipPartiallyEmittedExpressions(node).kind);
    }
    ts.isLeftHandSideExpression = isLeftHandSideExpression;
    function isLeftHandSideExpressionKind(kind) {
        switch (kind) {
            case 185 /* PropertyAccessExpression */:
            case 186 /* ElementAccessExpression */:
            case 188 /* NewExpression */:
            case 187 /* CallExpression */:
            case 255 /* JsxElement */:
            case 256 /* JsxSelfClosingElement */:
            case 259 /* JsxFragment */:
            case 189 /* TaggedTemplateExpression */:
            case 183 /* ArrayLiteralExpression */:
            case 191 /* ParenthesizedExpression */:
            case 184 /* ObjectLiteralExpression */:
            case 205 /* ClassExpression */:
            case 192 /* FunctionExpression */:
            case 71 /* Identifier */:
            case 12 /* RegularExpressionLiteral */:
            case 8 /* NumericLiteral */:
            case 9 /* StringLiteral */:
            case 13 /* NoSubstitutionTemplateLiteral */:
            case 202 /* TemplateExpression */:
            case 86 /* FalseKeyword */:
            case 95 /* NullKeyword */:
            case 99 /* ThisKeyword */:
            case 101 /* TrueKeyword */:
            case 97 /* SuperKeyword */:
            case 209 /* NonNullExpression */:
            case 210 /* MetaProperty */:
            case 91 /* ImportKeyword */: // technically this is only an Expression if it's in a CallExpression
                return true;
            default:
                return false;
        }
    }
    /* @internal */
    function isUnaryExpression(node) {
        return isUnaryExpressionKind(ts.skipPartiallyEmittedExpressions(node).kind);
    }
    ts.isUnaryExpression = isUnaryExpression;
    function isUnaryExpressionKind(kind) {
        switch (kind) {
            case 198 /* PrefixUnaryExpression */:
            case 199 /* PostfixUnaryExpression */:
            case 194 /* DeleteExpression */:
            case 195 /* TypeOfExpression */:
            case 196 /* VoidExpression */:
            case 197 /* AwaitExpression */:
            case 190 /* TypeAssertionExpression */:
                return true;
            default:
                return isLeftHandSideExpressionKind(kind);
        }
    }
    /* @internal */
    function isUnaryExpressionWithWrite(expr) {
        switch (expr.kind) {
            case 199 /* PostfixUnaryExpression */:
                return true;
            case 198 /* PrefixUnaryExpression */:
                return expr.operator === 43 /* PlusPlusToken */ ||
                    expr.operator === 44 /* MinusMinusToken */;
            default:
                return false;
        }
    }
    ts.isUnaryExpressionWithWrite = isUnaryExpressionWithWrite;
    /* @internal */
    /**
     * Determines whether a node is an expression based only on its kind.
     * Use `isExpressionNode` if not in transforms.
     */
    function isExpression(node) {
        return isExpressionKind(ts.skipPartiallyEmittedExpressions(node).kind);
    }
    ts.isExpression = isExpression;
    function isExpressionKind(kind) {
        switch (kind) {
            case 201 /* ConditionalExpression */:
            case 203 /* YieldExpression */:
            case 193 /* ArrowFunction */:
            case 200 /* BinaryExpression */:
            case 204 /* SpreadElement */:
            case 208 /* AsExpression */:
            case 206 /* OmittedExpression */:
            case 302 /* CommaListExpression */:
            case 301 /* PartiallyEmittedExpression */:
                return true;
            default:
                return isUnaryExpressionKind(kind);
        }
    }
    function isAssertionExpression(node) {
        var kind = node.kind;
        return kind === 190 /* TypeAssertionExpression */
            || kind === 208 /* AsExpression */;
    }
    ts.isAssertionExpression = isAssertionExpression;
    /* @internal */
    function isPartiallyEmittedExpression(node) {
        return node.kind === 301 /* PartiallyEmittedExpression */;
    }
    ts.isPartiallyEmittedExpression = isPartiallyEmittedExpression;
    /* @internal */
    function isNotEmittedStatement(node) {
        return node.kind === 300 /* NotEmittedStatement */;
    }
    ts.isNotEmittedStatement = isNotEmittedStatement;
    /* @internal */
    function isNotEmittedOrPartiallyEmittedNode(node) {
        return isNotEmittedStatement(node)
            || isPartiallyEmittedExpression(node);
    }
    ts.isNotEmittedOrPartiallyEmittedNode = isNotEmittedOrPartiallyEmittedNode;
    function isIterationStatement(node, lookInLabeledStatements) {
        switch (node.kind) {
            case 220 /* ForStatement */:
            case 221 /* ForInStatement */:
            case 222 /* ForOfStatement */:
            case 218 /* DoStatement */:
            case 219 /* WhileStatement */:
                return true;
            case 228 /* LabeledStatement */:
                return lookInLabeledStatements && isIterationStatement(node.statement, lookInLabeledStatements);
        }
        return false;
    }
    ts.isIterationStatement = isIterationStatement;
    /* @internal */
    function isForInOrOfStatement(node) {
        return node.kind === 221 /* ForInStatement */ || node.kind === 222 /* ForOfStatement */;
    }
    ts.isForInOrOfStatement = isForInOrOfStatement;
    // Element
    /* @internal */
    function isConciseBody(node) {
        return ts.isBlock(node)
            || isExpression(node);
    }
    ts.isConciseBody = isConciseBody;
    /* @internal */
    function isFunctionBody(node) {
        return ts.isBlock(node);
    }
    ts.isFunctionBody = isFunctionBody;
    /* @internal */
    function isForInitializer(node) {
        return ts.isVariableDeclarationList(node)
            || isExpression(node);
    }
    ts.isForInitializer = isForInitializer;
    /* @internal */
    function isModuleBody(node) {
        var kind = node.kind;
        return kind === 240 /* ModuleBlock */
            || kind === 239 /* ModuleDeclaration */
            || kind === 71 /* Identifier */;
    }
    ts.isModuleBody = isModuleBody;
    /* @internal */
    function isNamespaceBody(node) {
        var kind = node.kind;
        return kind === 240 /* ModuleBlock */
            || kind === 239 /* ModuleDeclaration */;
    }
    ts.isNamespaceBody = isNamespaceBody;
    /* @internal */
    function isJSDocNamespaceBody(node) {
        var kind = node.kind;
        return kind === 71 /* Identifier */
            || kind === 239 /* ModuleDeclaration */;
    }
    ts.isJSDocNamespaceBody = isJSDocNamespaceBody;
    /* @internal */
    function isNamedImportBindings(node) {
        var kind = node.kind;
        return kind === 247 /* NamedImports */
            || kind === 246 /* NamespaceImport */;
    }
    ts.isNamedImportBindings = isNamedImportBindings;
    /* @internal */
    function isModuleOrEnumDeclaration(node) {
        return node.kind === 239 /* ModuleDeclaration */ || node.kind === 238 /* EnumDeclaration */;
    }
    ts.isModuleOrEnumDeclaration = isModuleOrEnumDeclaration;
    function isDeclarationKind(kind) {
        return kind === 193 /* ArrowFunction */
            || kind === 182 /* BindingElement */
            || kind === 235 /* ClassDeclaration */
            || kind === 205 /* ClassExpression */
            || kind === 155 /* Constructor */
            || kind === 238 /* EnumDeclaration */
            || kind === 273 /* EnumMember */
            || kind === 252 /* ExportSpecifier */
            || kind === 234 /* FunctionDeclaration */
            || kind === 192 /* FunctionExpression */
            || kind === 156 /* GetAccessor */
            || kind === 245 /* ImportClause */
            || kind === 243 /* ImportEqualsDeclaration */
            || kind === 248 /* ImportSpecifier */
            || kind === 236 /* InterfaceDeclaration */
            || kind === 262 /* JsxAttribute */
            || kind === 154 /* MethodDeclaration */
            || kind === 153 /* MethodSignature */
            || kind === 239 /* ModuleDeclaration */
            || kind === 242 /* NamespaceExportDeclaration */
            || kind === 246 /* NamespaceImport */
            || kind === 149 /* Parameter */
            || kind === 270 /* PropertyAssignment */
            || kind === 152 /* PropertyDeclaration */
            || kind === 151 /* PropertySignature */
            || kind === 157 /* SetAccessor */
            || kind === 271 /* ShorthandPropertyAssignment */
            || kind === 237 /* TypeAliasDeclaration */
            || kind === 148 /* TypeParameter */
            || kind === 232 /* VariableDeclaration */
            || kind === 297 /* JSDocTypedefTag */
            || kind === 292 /* JSDocCallbackTag */
            || kind === 298 /* JSDocPropertyTag */;
    }
    function isDeclarationStatementKind(kind) {
        return kind === 234 /* FunctionDeclaration */
            || kind === 253 /* MissingDeclaration */
            || kind === 235 /* ClassDeclaration */
            || kind === 236 /* InterfaceDeclaration */
            || kind === 237 /* TypeAliasDeclaration */
            || kind === 238 /* EnumDeclaration */
            || kind === 239 /* ModuleDeclaration */
            || kind === 244 /* ImportDeclaration */
            || kind === 243 /* ImportEqualsDeclaration */
            || kind === 250 /* ExportDeclaration */
            || kind === 249 /* ExportAssignment */
            || kind === 242 /* NamespaceExportDeclaration */;
    }
    function isStatementKindButNotDeclarationKind(kind) {
        return kind === 224 /* BreakStatement */
            || kind === 223 /* ContinueStatement */
            || kind === 231 /* DebuggerStatement */
            || kind === 218 /* DoStatement */
            || kind === 216 /* ExpressionStatement */
            || kind === 215 /* EmptyStatement */
            || kind === 221 /* ForInStatement */
            || kind === 222 /* ForOfStatement */
            || kind === 220 /* ForStatement */
            || kind === 217 /* IfStatement */
            || kind === 228 /* LabeledStatement */
            || kind === 225 /* ReturnStatement */
            || kind === 227 /* SwitchStatement */
            || kind === 229 /* ThrowStatement */
            || kind === 230 /* TryStatement */
            || kind === 214 /* VariableStatement */
            || kind === 219 /* WhileStatement */
            || kind === 226 /* WithStatement */
            || kind === 300 /* NotEmittedStatement */
            || kind === 304 /* EndOfDeclarationMarker */
            || kind === 303 /* MergeDeclarationMarker */;
    }
    /* @internal */
    function isDeclaration(node) {
        if (node.kind === 148 /* TypeParameter */) {
            return node.parent.kind !== 296 /* JSDocTemplateTag */ || ts.isInJavaScriptFile(node);
        }
        return isDeclarationKind(node.kind);
    }
    ts.isDeclaration = isDeclaration;
    /* @internal */
    function isDeclarationStatement(node) {
        return isDeclarationStatementKind(node.kind);
    }
    ts.isDeclarationStatement = isDeclarationStatement;
    /**
     * Determines whether the node is a statement that is not also a declaration
     */
    /* @internal */
    function isStatementButNotDeclaration(node) {
        return isStatementKindButNotDeclarationKind(node.kind);
    }
    ts.isStatementButNotDeclaration = isStatementButNotDeclaration;
    /* @internal */
    function isStatement(node) {
        var kind = node.kind;
        return isStatementKindButNotDeclarationKind(kind)
            || isDeclarationStatementKind(kind)
            || isBlockStatement(node);
    }
    ts.isStatement = isStatement;
    function isBlockStatement(node) {
        if (node.kind !== 213 /* Block */)
            return false;
        if (node.parent !== undefined) {
            if (node.parent.kind === 230 /* TryStatement */ || node.parent.kind === 269 /* CatchClause */) {
                return false;
            }
        }
        return !ts.isFunctionBlock(node);
    }
    // Module references
    /* @internal */
    function isModuleReference(node) {
        var kind = node.kind;
        return kind === 254 /* ExternalModuleReference */
            || kind === 146 /* QualifiedName */
            || kind === 71 /* Identifier */;
    }
    ts.isModuleReference = isModuleReference;
    // JSX
    /* @internal */
    function isJsxTagNameExpression(node) {
        var kind = node.kind;
        return kind === 99 /* ThisKeyword */
            || kind === 71 /* Identifier */
            || kind === 185 /* PropertyAccessExpression */;
    }
    ts.isJsxTagNameExpression = isJsxTagNameExpression;
    /* @internal */
    function isJsxChild(node) {
        var kind = node.kind;
        return kind === 255 /* JsxElement */
            || kind === 265 /* JsxExpression */
            || kind === 256 /* JsxSelfClosingElement */
            || kind === 10 /* JsxText */
            || kind === 259 /* JsxFragment */;
    }
    ts.isJsxChild = isJsxChild;
    /* @internal */
    function isJsxAttributeLike(node) {
        var kind = node.kind;
        return kind === 262 /* JsxAttribute */
            || kind === 264 /* JsxSpreadAttribute */;
    }
    ts.isJsxAttributeLike = isJsxAttributeLike;
    /* @internal */
    function isStringLiteralOrJsxExpression(node) {
        var kind = node.kind;
        return kind === 9 /* StringLiteral */
            || kind === 265 /* JsxExpression */;
    }
    ts.isStringLiteralOrJsxExpression = isStringLiteralOrJsxExpression;
    function isJsxOpeningLikeElement(node) {
        var kind = node.kind;
        return kind === 257 /* JsxOpeningElement */
            || kind === 256 /* JsxSelfClosingElement */;
    }
    ts.isJsxOpeningLikeElement = isJsxOpeningLikeElement;
    // Clauses
    function isCaseOrDefaultClause(node) {
        var kind = node.kind;
        return kind === 266 /* CaseClause */
            || kind === 267 /* DefaultClause */;
    }
    ts.isCaseOrDefaultClause = isCaseOrDefaultClause;
    // JSDoc
    /** True if node is of some JSDoc syntax kind. */
    /* @internal */
    function isJSDocNode(node) {
        return node.kind >= 278 /* FirstJSDocNode */ && node.kind <= 298 /* LastJSDocNode */;
    }
    ts.isJSDocNode = isJSDocNode;
    /** True if node is of a kind that may contain comment text. */
    function isJSDocCommentContainingNode(node) {
        return node.kind === 286 /* JSDocComment */ || isJSDocTag(node) || ts.isJSDocTypeLiteral(node) || ts.isJSDocSignature(node);
    }
    ts.isJSDocCommentContainingNode = isJSDocCommentContainingNode;
    // TODO: determine what this does before making it public.
    /* @internal */
    function isJSDocTag(node) {
        return node.kind >= 289 /* FirstJSDocTagNode */ && node.kind <= 298 /* LastJSDocTagNode */;
    }
    ts.isJSDocTag = isJSDocTag;
    function isSetAccessor(node) {
        return node.kind === 157 /* SetAccessor */;
    }
    ts.isSetAccessor = isSetAccessor;
    function isGetAccessor(node) {
        return node.kind === 156 /* GetAccessor */;
    }
    ts.isGetAccessor = isGetAccessor;
    /** True if has jsdoc nodes attached to it. */
    /* @internal */
    // TODO: GH#19856 Would like to return `node is Node & { jsDoc: JSDoc[] }` but it causes long compile times
    function hasJSDocNodes(node) {
        var jsDoc = node.jsDoc;
        return !!jsDoc && jsDoc.length > 0;
    }
    ts.hasJSDocNodes = hasJSDocNodes;
    /** True if has type node attached to it. */
    /* @internal */
    function hasType(node) {
        return !!node.type;
    }
    ts.hasType = hasType;
    /* True if the node could have a type node a `.type` */
    /* @internal */
    function couldHaveType(node) {
        switch (node.kind) {
            case 149 /* Parameter */:
            case 151 /* PropertySignature */:
            case 152 /* PropertyDeclaration */:
            case 153 /* MethodSignature */:
            case 154 /* MethodDeclaration */:
            case 155 /* Constructor */:
            case 156 /* GetAccessor */:
            case 157 /* SetAccessor */:
            case 158 /* CallSignature */:
            case 159 /* ConstructSignature */:
            case 160 /* IndexSignature */:
            case 161 /* TypePredicate */:
            case 163 /* FunctionType */:
            case 164 /* ConstructorType */:
            case 173 /* ParenthesizedType */:
            case 175 /* TypeOperator */:
            case 177 /* MappedType */:
            case 190 /* TypeAssertionExpression */:
            case 192 /* FunctionExpression */:
            case 193 /* ArrowFunction */:
            case 208 /* AsExpression */:
            case 232 /* VariableDeclaration */:
            case 234 /* FunctionDeclaration */:
            case 237 /* TypeAliasDeclaration */:
            case 278 /* JSDocTypeExpression */:
            case 281 /* JSDocNullableType */:
            case 282 /* JSDocNonNullableType */:
            case 283 /* JSDocOptionalType */:
            case 284 /* JSDocFunctionType */:
            case 285 /* JSDocVariadicType */:
                return true;
        }
        return false;
    }
    ts.couldHaveType = couldHaveType;
    /** True if has initializer node attached to it. */
    /* @internal */
    function hasInitializer(node) {
        return !!node.initializer;
    }
    ts.hasInitializer = hasInitializer;
    /** True if has initializer node attached to it. */
    /* @internal */
    function hasOnlyExpressionInitializer(node) {
        return hasInitializer(node) && !ts.isForStatement(node) && !ts.isForInStatement(node) && !ts.isForOfStatement(node) && !ts.isJsxAttribute(node);
    }
    ts.hasOnlyExpressionInitializer = hasOnlyExpressionInitializer;
    function isObjectLiteralElement(node) {
        switch (node.kind) {
            case 262 /* JsxAttribute */:
            case 264 /* JsxSpreadAttribute */:
            case 270 /* PropertyAssignment */:
            case 271 /* ShorthandPropertyAssignment */:
            case 154 /* MethodDeclaration */:
            case 156 /* GetAccessor */:
            case 157 /* SetAccessor */:
                return true;
            default:
                return false;
        }
    }
    ts.isObjectLiteralElement = isObjectLiteralElement;
    /* @internal */
    function isTypeReferenceType(node) {
        return node.kind === 162 /* TypeReference */ || node.kind === 207 /* ExpressionWithTypeArguments */;
    }
    ts.isTypeReferenceType = isTypeReferenceType;
    var MAX_SMI_X86 = 1073741823;
    /* @internal */
    function guessIndentation(lines) {
        var indentation = MAX_SMI_X86;
        for (var _i = 0, lines_1 = lines; _i < lines_1.length; _i++) {
            var line = lines_1[_i];
            if (!line.length) {
                continue;
            }
            var i = 0;
            for (; i < line.length && i < indentation; i++) {
                if (!ts.isWhiteSpaceLike(line.charCodeAt(i))) {
                    break;
                }
            }
            if (i < indentation) {
                indentation = i;
            }
            if (indentation === 0) {
                return 0;
            }
        }
        return indentation === MAX_SMI_X86 ? undefined : indentation;
    }
    ts.guessIndentation = guessIndentation;
    function isStringLiteralLike(node) {
        return node.kind === 9 /* StringLiteral */ || node.kind === 13 /* NoSubstitutionTemplateLiteral */;
    }
    ts.isStringLiteralLike = isStringLiteralLike;
    /** @internal */
    function isNamedImportsOrExports(node) {
        return node.kind === 247 /* NamedImports */ || node.kind === 251 /* NamedExports */;
    }
    ts.isNamedImportsOrExports = isNamedImportsOrExports;
    function Symbol(flags, name) {
        this.flags = flags;
        this.escapedName = name;
        this.declarations = undefined;
        this.valueDeclaration = undefined;
        this.id = undefined;
        this.mergeId = undefined;
        this.parent = undefined;
    }
    function Type(checker, flags) {
        this.flags = flags;
        if (Debug.isDebugging) {
            this.checker = checker;
        }
    }
    function Signature() { } // tslint:disable-line no-empty
    function Node(kind, pos, end) {
        this.pos = pos;
        this.end = end;
        this.kind = kind;
        this.id = 0;
        this.flags = 0 /* None */;
        this.modifierFlagsCache = 0 /* None */;
        this.transformFlags = 0 /* None */;
        this.parent = undefined;
        this.original = undefined;
    }
    function SourceMapSource(fileName, text, skipTrivia) {
        this.fileName = fileName;
        this.text = text;
        this.skipTrivia = skipTrivia || (function (pos) { return pos; });
    }
    ts.objectAllocator = {
        getNodeConstructor: function () { return Node; },
        getTokenConstructor: function () { return Node; },
        getIdentifierConstructor: function () { return Node; },
        getSourceFileConstructor: function () { return Node; },
        getSymbolConstructor: function () { return Symbol; },
        getTypeConstructor: function () { return Type; },
        getSignatureConstructor: function () { return Signature; },
        getSourceMapSourceConstructor: function () { return SourceMapSource; },
    };
    function formatStringFromArgs(text, args, baseIndex) {
        if (baseIndex === void 0) { baseIndex = 0; }
        return text.replace(/{(\d+)}/g, function (_match, index) { return Debug.assertDefined(args[+index + baseIndex]); });
    }
    ts.formatStringFromArgs = formatStringFromArgs;
    function getLocaleSpecificMessage(message) {
        return ts.localizedDiagnosticMessages && ts.localizedDiagnosticMessages[message.key] || message.message;
    }
    ts.getLocaleSpecificMessage = getLocaleSpecificMessage;
    function createFileDiagnostic(file, start, length, message) {
        Debug.assertGreaterThanOrEqual(start, 0);
        Debug.assertGreaterThanOrEqual(length, 0);
        if (file) {
            Debug.assertLessThanOrEqual(start, file.text.length);
            Debug.assertLessThanOrEqual(start + length, file.text.length);
        }
        var text = getLocaleSpecificMessage(message);
        if (arguments.length > 4) {
            text = formatStringFromArgs(text, arguments, 4);
        }
        return {
            file: file,
            start: start,
            length: length,
            messageText: text,
            category: message.category,
            code: message.code,
            reportsUnnecessary: message.reportsUnnecessary,
        };
    }
    ts.createFileDiagnostic = createFileDiagnostic;
    /* @internal */
    function formatMessage(_dummy, message) {
        var text = getLocaleSpecificMessage(message);
        if (arguments.length > 2) {
            text = formatStringFromArgs(text, arguments, 2);
        }
        return text;
    }
    ts.formatMessage = formatMessage;
    function createCompilerDiagnostic(message) {
        var text = getLocaleSpecificMessage(message);
        if (arguments.length > 1) {
            text = formatStringFromArgs(text, arguments, 1);
        }
        return {
            file: undefined,
            start: undefined,
            length: undefined,
            messageText: text,
            category: message.category,
            code: message.code,
            reportsUnnecessary: message.reportsUnnecessary,
        };
    }
    ts.createCompilerDiagnostic = createCompilerDiagnostic;
    function createCompilerDiagnosticFromMessageChain(chain) {
        return {
            file: undefined,
            start: undefined,
            length: undefined,
            code: chain.code,
            category: chain.category,
            messageText: chain.next ? chain : chain.messageText,
        };
    }
    ts.createCompilerDiagnosticFromMessageChain = createCompilerDiagnosticFromMessageChain;
    function chainDiagnosticMessages(details, message) {
        var text = getLocaleSpecificMessage(message);
        if (arguments.length > 2) {
            text = formatStringFromArgs(text, arguments, 2);
        }
        return {
            messageText: text,
            category: message.category,
            code: message.code,
            next: details
        };
    }
    ts.chainDiagnosticMessages = chainDiagnosticMessages;
    function concatenateDiagnosticMessageChains(headChain, tailChain) {
        var lastChain = headChain;
        while (lastChain.next) {
            lastChain = lastChain.next;
        }
        lastChain.next = tailChain;
        return headChain;
    }
    ts.concatenateDiagnosticMessageChains = concatenateDiagnosticMessageChains;
    function getDiagnosticFilePath(diagnostic) {
        return diagnostic.file ? diagnostic.file.path : undefined;
    }
    function compareDiagnostics(d1, d2) {
        return ts.compareStringsCaseSensitive(getDiagnosticFilePath(d1), getDiagnosticFilePath(d2)) ||
            ts.compareValues(d1.start, d2.start) ||
            ts.compareValues(d1.length, d2.length) ||
            ts.compareValues(d1.code, d2.code) ||
            compareMessageText(d1.messageText, d2.messageText) ||
            0 /* EqualTo */;
    }
    ts.compareDiagnostics = compareDiagnostics;
    function compareMessageText(t1, t2) {
        var text1 = t1;
        var text2 = t2;
        while (text1 && text2) {
            // We still have both chains.
            var string1 = ts.isString(text1) ? text1 : text1.messageText;
            var string2 = ts.isString(text2) ? text2 : text2.messageText;
            var res = ts.compareStringsCaseSensitive(string1, string2);
            if (res) {
                return res;
            }
            text1 = ts.isString(text1) ? undefined : text1.next;
            text2 = ts.isString(text2) ? undefined : text2.next;
        }
        if (!text1 && !text2) {
            // if the chains are done, then these messages are the same.
            return 0 /* EqualTo */;
        }
        // We still have one chain remaining.  The shorter chain should come first.
        return text1 ? 1 /* GreaterThan */ : -1 /* LessThan */;
    }
    function getEmitScriptTarget(compilerOptions) {
        return compilerOptions.target || 0 /* ES3 */;
    }
    ts.getEmitScriptTarget = getEmitScriptTarget;
    function getEmitModuleKind(compilerOptions) {
        return typeof compilerOptions.module === "number" ?
            compilerOptions.module :
            getEmitScriptTarget(compilerOptions) >= 2 /* ES2015 */ ? ts.ModuleKind.ES2015 : ts.ModuleKind.CommonJS;
    }
    ts.getEmitModuleKind = getEmitModuleKind;
    function getEmitModuleResolutionKind(compilerOptions) {
        var moduleResolution = compilerOptions.moduleResolution;
        if (moduleResolution === undefined) {
            moduleResolution = getEmitModuleKind(compilerOptions) === ts.ModuleKind.CommonJS ? ts.ModuleResolutionKind.NodeJs : ts.ModuleResolutionKind.Classic;
        }
        return moduleResolution;
    }
    ts.getEmitModuleResolutionKind = getEmitModuleResolutionKind;
    function unreachableCodeIsError(options) {
        return options.allowUnreachableCode === false;
    }
    ts.unreachableCodeIsError = unreachableCodeIsError;
    function unusedLabelIsError(options) {
        return options.allowUnusedLabels === false;
    }
    ts.unusedLabelIsError = unusedLabelIsError;
    function getAreDeclarationMapsEnabled(options) {
        return !!(options.declaration && options.declarationMap);
    }
    ts.getAreDeclarationMapsEnabled = getAreDeclarationMapsEnabled;
    function getAllowSyntheticDefaultImports(compilerOptions) {
        var moduleKind = getEmitModuleKind(compilerOptions);
        return compilerOptions.allowSyntheticDefaultImports !== undefined
            ? compilerOptions.allowSyntheticDefaultImports
            : compilerOptions.esModuleInterop
                ? moduleKind !== ts.ModuleKind.None && moduleKind < ts.ModuleKind.ES2015
                : moduleKind === ts.ModuleKind.System;
    }
    ts.getAllowSyntheticDefaultImports = getAllowSyntheticDefaultImports;
    function getEmitDeclarations(compilerOptions) {
        return !!(compilerOptions.declaration || compilerOptions.composite);
    }
    ts.getEmitDeclarations = getEmitDeclarations;
    function getStrictOptionValue(compilerOptions, flag) {
        return compilerOptions[flag] === undefined ? !!compilerOptions.strict : !!compilerOptions[flag];
    }
    ts.getStrictOptionValue = getStrictOptionValue;
    function hasZeroOrOneAsteriskCharacter(str) {
        var seenAsterisk = false;
        for (var i = 0; i < str.length; i++) {
            if (str.charCodeAt(i) === 42 /* asterisk */) {
                if (!seenAsterisk) {
                    seenAsterisk = true;
                }
                else {
                    // have already seen asterisk
                    return false;
                }
            }
        }
        return true;
    }
    ts.hasZeroOrOneAsteriskCharacter = hasZeroOrOneAsteriskCharacter;
    /**
     * Internally, we represent paths as strings with '/' as the directory separator.
     * When we make system calls (eg: LanguageServiceHost.getDirectory()),
     * we expect the host to correctly handle paths in our specified format.
     */
    ts.directorySeparator = "/";
    var altDirectorySeparator = "\\";
    var urlSchemeSeparator = "://";
    var backslashRegExp = /\\/g;
    /**
     * Normalize path separators.
     */
    function normalizeSlashes(path) {
        return path.replace(backslashRegExp, ts.directorySeparator);
    }
    ts.normalizeSlashes = normalizeSlashes;
    function isVolumeCharacter(charCode) {
        return (charCode >= 97 /* a */ && charCode <= 122 /* z */) ||
            (charCode >= 65 /* A */ && charCode <= 90 /* Z */);
    }
    function getFileUrlVolumeSeparatorEnd(url, start) {
        var ch0 = url.charCodeAt(start);
        if (ch0 === 58 /* colon */)
            return start + 1;
        if (ch0 === 37 /* percent */ && url.charCodeAt(start + 1) === 51 /* _3 */) {
            var ch2 = url.charCodeAt(start + 2);
            if (ch2 === 97 /* a */ || ch2 === 65 /* A */)
                return start + 3;
        }
        return -1;
    }
    /**
     * Returns length of the root part of a path or URL (i.e. length of "/", "x:/", "//server/share/, file:///user/files").
     * If the root is part of a URL, the twos-complement of the root length is returned.
     */
    function getEncodedRootLength(path) {
        if (!path)
            return 0;
        var ch0 = path.charCodeAt(0);
        // POSIX or UNC
        if (ch0 === 47 /* slash */ || ch0 === 92 /* backslash */) {
            if (path.charCodeAt(1) !== ch0)
                return 1; // POSIX: "/" (or non-normalized "\")
            var p1 = path.indexOf(ch0 === 47 /* slash */ ? ts.directorySeparator : altDirectorySeparator, 2);
            if (p1 < 0)
                return path.length; // UNC: "//server" or "\\server"
            return p1 + 1; // UNC: "//server/" or "\\server\"
        }
        // DOS
        if (isVolumeCharacter(ch0) && path.charCodeAt(1) === 58 /* colon */) {
            var ch2 = path.charCodeAt(2);
            if (ch2 === 47 /* slash */ || ch2 === 92 /* backslash */)
                return 3; // DOS: "c:/" or "c:\"
            if (path.length === 2)
                return 2; // DOS: "c:" (but not "c:d")
        }
        // URL
        var schemeEnd = path.indexOf(urlSchemeSeparator);
        if (schemeEnd !== -1) {
            var authorityStart = schemeEnd + urlSchemeSeparator.length;
            var authorityEnd = path.indexOf(ts.directorySeparator, authorityStart);
            if (authorityEnd !== -1) { // URL: "file:///", "file://server/", "file://server/path"
                // For local "file" URLs, include the leading DOS volume (if present).
                // Per https://www.ietf.org/rfc/rfc1738.txt, a host of "" or "localhost" is a
                // special case interpreted as "the machine from which the URL is being interpreted".
                var scheme = path.slice(0, schemeEnd);
                var authority = path.slice(authorityStart, authorityEnd);
                if (scheme === "file" && (authority === "" || authority === "localhost") &&
                    isVolumeCharacter(path.charCodeAt(authorityEnd + 1))) {
                    var volumeSeparatorEnd = getFileUrlVolumeSeparatorEnd(path, authorityEnd + 2);
                    if (volumeSeparatorEnd !== -1) {
                        if (path.charCodeAt(volumeSeparatorEnd) === 47 /* slash */) {
                            // URL: "file:///c:/", "file://localhost/c:/", "file:///c%3a/", "file://localhost/c%3a/"
                            return ~(volumeSeparatorEnd + 1);
                        }
                        if (volumeSeparatorEnd === path.length) {
                            // URL: "file:///c:", "file://localhost/c:", "file:///c$3a", "file://localhost/c%3a"
                            // but not "file:///c:d" or "file:///c%3ad"
                            return ~volumeSeparatorEnd;
                        }
                    }
                }
                return ~(authorityEnd + 1); // URL: "file://server/", "http://server/"
            }
            return ~path.length; // URL: "file://server", "http://server"
        }
        // relative
        return 0;
    }
    /**
     * Returns length of the root part of a path or URL (i.e. length of "/", "x:/", "//server/share/, file:///user/files").
     *
     * For example:
     * ```ts
     * getRootLength("a") === 0                   // ""
     * getRootLength("/") === 1                   // "/"
     * getRootLength("c:") === 2                  // "c:"
     * getRootLength("c:d") === 0                 // ""
     * getRootLength("c:/") === 3                 // "c:/"
     * getRootLength("c:\\") === 3                // "c:\\"
     * getRootLength("//server") === 7            // "//server"
     * getRootLength("//server/share") === 8      // "//server/"
     * getRootLength("\\\\server") === 7          // "\\\\server"
     * getRootLength("\\\\server\\share") === 8   // "\\\\server\\"
     * getRootLength("file:///path") === 8        // "file:///"
     * getRootLength("file:///c:") === 10         // "file:///c:"
     * getRootLength("file:///c:d") === 8         // "file:///"
     * getRootLength("file:///c:/path") === 11    // "file:///c:/"
     * getRootLength("file://server") === 13      // "file://server"
     * getRootLength("file://server/path") === 14 // "file://server/"
     * getRootLength("http://server") === 13      // "http://server"
     * getRootLength("http://server/path") === 14 // "http://server/"
     * ```
     */
    function getRootLength(path) {
        var rootLength = getEncodedRootLength(path);
        return rootLength < 0 ? ~rootLength : rootLength;
    }
    ts.getRootLength = getRootLength;
    // TODO(rbuckton): replace references with `resolvePath`
    function normalizePath(path) {
        return resolvePath(path);
    }
    ts.normalizePath = normalizePath;
    function normalizePathAndParts(path) {
        path = normalizeSlashes(path);
        var _a = reducePathComponents(getPathComponents(path)), root = _a[0], parts = _a.slice(1);
        if (parts.length) {
            var joinedParts = root + parts.join(ts.directorySeparator);
            return { path: hasTrailingDirectorySeparator(path) ? ensureTrailingDirectorySeparator(joinedParts) : joinedParts, parts: parts };
        }
        else {
            return { path: root, parts: parts };
        }
    }
    ts.normalizePathAndParts = normalizePathAndParts;
    function getDirectoryPath(path) {
        path = normalizeSlashes(path);
        // If the path provided is itself the root, then return it.
        var rootLength = getRootLength(path);
        if (rootLength === path.length)
            return path;
        // return the leading portion of the path up to the last (non-terminal) directory separator
        // but not including any trailing directory separator.
        path = removeTrailingDirectorySeparator(path);
        return path.slice(0, Math.max(rootLength, path.lastIndexOf(ts.directorySeparator)));
    }
    ts.getDirectoryPath = getDirectoryPath;
    function isUrl(path) {
        return getEncodedRootLength(path) < 0;
    }
    ts.isUrl = isUrl;
    function pathIsRelative(path) {
        return /^\.\.?($|[\\/])/.test(path);
    }
    ts.pathIsRelative = pathIsRelative;
    /**
     * Determines whether a path is an absolute path (e.g. starts with `/`, or a dos path
     * like `c:`, `c:\` or `c:/`).
     */
    function isRootedDiskPath(path) {
        return getEncodedRootLength(path) > 0;
    }
    ts.isRootedDiskPath = isRootedDiskPath;
    /**
     * Determines whether a path consists only of a path root.
     */
    function isDiskPathRoot(path) {
        var rootLength = getEncodedRootLength(path);
        return rootLength > 0 && rootLength === path.length;
    }
    ts.isDiskPathRoot = isDiskPathRoot;
    function convertToRelativePath(absoluteOrRelativePath, basePath, getCanonicalFileName) {
        return !isRootedDiskPath(absoluteOrRelativePath)
            ? absoluteOrRelativePath
            : getRelativePathToDirectoryOrUrl(basePath, absoluteOrRelativePath, basePath, getCanonicalFileName, /*isAbsolutePathAnUrl*/ false);
    }
    ts.convertToRelativePath = convertToRelativePath;
    function pathComponents(path, rootLength) {
        var root = path.substring(0, rootLength);
        var rest = path.substring(rootLength).split(ts.directorySeparator);
        if (rest.length && !ts.lastOrUndefined(rest))
            rest.pop();
        return [root].concat(rest);
    }
    /**
     * Parse a path into an array containing a root component (at index 0) and zero or more path
     * components (at indices > 0). The result is not normalized.
     * If the path is relative, the root component is `""`.
     * If the path is absolute, the root component includes the first path separator (`/`).
     */
    function getPathComponents(path, currentDirectory) {
        if (currentDirectory === void 0) { currentDirectory = ""; }
        path = combinePaths(currentDirectory, path);
        var rootLength = getRootLength(path);
        return pathComponents(path, rootLength);
    }
    ts.getPathComponents = getPathComponents;
    /**
     * Reduce an array of path components to a more simplified path by navigating any
     * `"."` or `".."` entries in the path.
     */
    function reducePathComponents(components) {
        if (!ts.some(components))
            return [];
        var reduced = [components[0]];
        for (var i = 1; i < components.length; i++) {
            var component = components[i];
            if (!component)
                continue;
            if (component === ".")
                continue;
            if (component === "..") {
                if (reduced.length > 1) {
                    if (reduced[reduced.length - 1] !== "..") {
                        reduced.pop();
                        continue;
                    }
                }
                else if (reduced[0])
                    continue;
            }
            reduced.push(component);
        }
        return reduced;
    }
    ts.reducePathComponents = reducePathComponents;
    /**
     * Parse a path into an array containing a root component (at index 0) and zero or more path
     * components (at indices > 0). The result is normalized.
     * If the path is relative, the root component is `""`.
     * If the path is absolute, the root component includes the first path separator (`/`).
     */
    function getNormalizedPathComponents(path, currentDirectory) {
        return reducePathComponents(getPathComponents(path, currentDirectory));
    }
    ts.getNormalizedPathComponents = getNormalizedPathComponents;
    function getNormalizedAbsolutePath(fileName, currentDirectory) {
        return getPathFromPathComponents(getNormalizedPathComponents(fileName, currentDirectory));
    }
    ts.getNormalizedAbsolutePath = getNormalizedAbsolutePath;
    /**
     * Formats a parsed path consisting of a root component (at index 0) and zero or more path
     * segments (at indices > 0).
     */
    function getPathFromPathComponents(pathComponents) {
        if (pathComponents.length === 0)
            return "";
        var root = pathComponents[0] && ensureTrailingDirectorySeparator(pathComponents[0]);
        if (pathComponents.length === 1)
            return root;
        return root + pathComponents.slice(1).join(ts.directorySeparator);
    }
    ts.getPathFromPathComponents = getPathFromPathComponents;
    function getPathComponentsRelativeTo(from, to, stringEqualityComparer, getCanonicalFileName) {
        var fromComponents = reducePathComponents(getPathComponents(from));
        var toComponents = reducePathComponents(getPathComponents(to));
        var start;
        for (start = 0; start < fromComponents.length && start < toComponents.length; start++) {
            var fromComponent = getCanonicalFileName(fromComponents[start]);
            var toComponent = getCanonicalFileName(toComponents[start]);
            var comparer = start === 0 ? ts.equateStringsCaseInsensitive : stringEqualityComparer;
            if (!comparer(fromComponent, toComponent))
                break;
        }
        if (start === 0) {
            return toComponents;
        }
        var components = toComponents.slice(start);
        var relative = [];
        for (; start < fromComponents.length; start++) {
            relative.push("..");
        }
        return [""].concat(relative, components);
    }
    function getRelativePathFromFile(from, to, getCanonicalFileName) {
        return ensurePathIsNonModuleName(getRelativePathFromDirectory(getDirectoryPath(from), to, getCanonicalFileName));
    }
    ts.getRelativePathFromFile = getRelativePathFromFile;
    function getRelativePathFromDirectory(fromDirectory, to, getCanonicalFileNameOrIgnoreCase) {
        Debug.assert((getRootLength(fromDirectory) > 0) === (getRootLength(to) > 0), "Paths must either both be absolute or both be relative");
        var getCanonicalFileName = typeof getCanonicalFileNameOrIgnoreCase === "function" ? getCanonicalFileNameOrIgnoreCase : ts.identity;
        var ignoreCase = typeof getCanonicalFileNameOrIgnoreCase === "boolean" ? getCanonicalFileNameOrIgnoreCase : false;
        var pathComponents = getPathComponentsRelativeTo(fromDirectory, to, ignoreCase ? ts.equateStringsCaseInsensitive : ts.equateStringsCaseSensitive, getCanonicalFileName);
        return getPathFromPathComponents(pathComponents);
    }
    ts.getRelativePathFromDirectory = getRelativePathFromDirectory;
    function getRelativePathToDirectoryOrUrl(directoryPathOrUrl, relativeOrAbsolutePath, currentDirectory, getCanonicalFileName, isAbsolutePathAnUrl) {
        var pathComponents = getPathComponentsRelativeTo(resolvePath(currentDirectory, directoryPathOrUrl), resolvePath(currentDirectory, relativeOrAbsolutePath), ts.equateStringsCaseSensitive, getCanonicalFileName);
        var firstComponent = pathComponents[0];
        if (isAbsolutePathAnUrl && isRootedDiskPath(firstComponent)) {
            var prefix = firstComponent.charAt(0) === ts.directorySeparator ? "file://" : "file:///";
            pathComponents[0] = prefix + firstComponent;
        }
        return getPathFromPathComponents(pathComponents);
    }
    ts.getRelativePathToDirectoryOrUrl = getRelativePathToDirectoryOrUrl;
    /**
     * Ensures a path is either absolute (prefixed with `/` or `c:`) or dot-relative (prefixed
     * with `./` or `../`) so as not to be confused with an unprefixed module name.
     */
    function ensurePathIsNonModuleName(path) {
        return getRootLength(path) === 0 && !pathIsRelative(path) ? "./" + path : path;
    }
    ts.ensurePathIsNonModuleName = ensurePathIsNonModuleName;
    function getBaseFileName(path, extensions, ignoreCase) {
        path = normalizeSlashes(path);
        // if the path provided is itself the root, then it has not file name.
        var rootLength = getRootLength(path);
        if (rootLength === path.length)
            return "";
        // return the trailing portion of the path starting after the last (non-terminal) directory
        // separator but not including any trailing directory separator.
        path = removeTrailingDirectorySeparator(path);
        var name = path.slice(Math.max(getRootLength(path), path.lastIndexOf(ts.directorySeparator) + 1));
        var extension = extensions !== undefined && ignoreCase !== undefined ? getAnyExtensionFromPath(name, extensions, ignoreCase) : undefined;
        return extension ? name.slice(0, name.length - extension.length) : name;
    }
    ts.getBaseFileName = getBaseFileName;
    /**
     * Combines paths. If a path is absolute, it replaces any previous path.
     */
    function combinePaths(path) {
        var paths = [];
        for (var _i = 1; _i < arguments.length; _i++) {
            paths[_i - 1] = arguments[_i];
        }
        if (path)
            path = normalizeSlashes(path);
        for (var _a = 0, paths_1 = paths; _a < paths_1.length; _a++) {
            var relativePath = paths_1[_a];
            if (!relativePath)
                continue;
            relativePath = normalizeSlashes(relativePath);
            if (!path || getRootLength(relativePath) !== 0) {
                path = relativePath;
            }
            else {
                path = ensureTrailingDirectorySeparator(path) + relativePath;
            }
        }
        return path;
    }
    ts.combinePaths = combinePaths;
    /**
     * Combines and resolves paths. If a path is absolute, it replaces any previous path. Any
     * `.` and `..` path components are resolved.
     */
    function resolvePath(path) {
        var paths = [];
        for (var _i = 1; _i < arguments.length; _i++) {
            paths[_i - 1] = arguments[_i];
        }
        var combined = ts.some(paths) ? combinePaths.apply(void 0, [path].concat(paths)) : normalizeSlashes(path);
        var normalized = getPathFromPathComponents(reducePathComponents(getPathComponents(combined)));
        return normalized && hasTrailingDirectorySeparator(combined) ? ensureTrailingDirectorySeparator(normalized) : normalized;
    }
    ts.resolvePath = resolvePath;
    /**
     * Determines whether a path has a trailing separator (`/` or `\\`).
     */
    function hasTrailingDirectorySeparator(path) {
        if (path.length === 0)
            return false;
        var ch = path.charCodeAt(path.length - 1);
        return ch === 47 /* slash */ || ch === 92 /* backslash */;
    }
    ts.hasTrailingDirectorySeparator = hasTrailingDirectorySeparator;
    function removeTrailingDirectorySeparator(path) {
        if (hasTrailingDirectorySeparator(path)) {
            return path.substr(0, path.length - 1);
        }
        return path;
    }
    ts.removeTrailingDirectorySeparator = removeTrailingDirectorySeparator;
    function ensureTrailingDirectorySeparator(path) {
        if (!hasTrailingDirectorySeparator(path)) {
            return path + ts.directorySeparator;
        }
        return path;
    }
    ts.ensureTrailingDirectorySeparator = ensureTrailingDirectorySeparator;
    function comparePathsWorker(a, b, componentComparer) {
        if (a === b)
            return 0 /* EqualTo */;
        if (a === undefined)
            return -1 /* LessThan */;
        if (b === undefined)
            return 1 /* GreaterThan */;
        var aComponents = reducePathComponents(getPathComponents(a));
        var bComponents = reducePathComponents(getPathComponents(b));
        var sharedLength = Math.min(aComponents.length, bComponents.length);
        for (var i = 0; i < sharedLength; i++) {
            var stringComparer = i === 0 ? ts.compareStringsCaseInsensitive : componentComparer;
            var result = stringComparer(aComponents[i], bComponents[i]);
            if (result !== 0 /* EqualTo */) {
                return result;
            }
        }
        return ts.compareValues(aComponents.length, bComponents.length);
    }
    /**
     * Performs a case-sensitive comparison of two paths.
     */
    function comparePathsCaseSensitive(a, b) {
        return comparePathsWorker(a, b, ts.compareStringsCaseSensitive);
    }
    ts.comparePathsCaseSensitive = comparePathsCaseSensitive;
    /**
     * Performs a case-insensitive comparison of two paths.
     */
    function comparePathsCaseInsensitive(a, b) {
        return comparePathsWorker(a, b, ts.compareStringsCaseInsensitive);
    }
    ts.comparePathsCaseInsensitive = comparePathsCaseInsensitive;
    function comparePaths(a, b, currentDirectory, ignoreCase) {
        if (typeof currentDirectory === "string") {
            a = combinePaths(currentDirectory, a);
            b = combinePaths(currentDirectory, b);
        }
        else if (typeof currentDirectory === "boolean") {
            ignoreCase = currentDirectory;
        }
        return comparePathsWorker(a, b, ts.getStringComparer(ignoreCase));
    }
    ts.comparePaths = comparePaths;
    function containsPath(parent, child, currentDirectory, ignoreCase) {
        if (typeof currentDirectory === "string") {
            parent = combinePaths(currentDirectory, parent);
            child = combinePaths(currentDirectory, child);
        }
        else if (typeof currentDirectory === "boolean") {
            ignoreCase = currentDirectory;
        }
        if (parent === undefined || child === undefined)
            return false;
        if (parent === child)
            return true;
        var parentComponents = reducePathComponents(getPathComponents(parent));
        var childComponents = reducePathComponents(getPathComponents(child));
        if (childComponents.length < parentComponents.length) {
            return false;
        }
        var componentEqualityComparer = ignoreCase ? ts.equateStringsCaseInsensitive : ts.equateStringsCaseSensitive;
        for (var i = 0; i < parentComponents.length; i++) {
            var equalityComparer = i === 0 ? ts.equateStringsCaseInsensitive : componentEqualityComparer;
            if (!equalityComparer(parentComponents[i], childComponents[i])) {
                return false;
            }
        }
        return true;
    }
    ts.containsPath = containsPath;
    function tryRemoveDirectoryPrefix(path, dirPath) {
        var a = ts.tryRemovePrefix(path, dirPath);
        if (a === undefined)
            return undefined;
        switch (a.charCodeAt(0)) {
            case 47 /* slash */:
            case 92 /* backslash */:
                return a.slice(1);
            default:
                return undefined;
        }
    }
    ts.tryRemoveDirectoryPrefix = tryRemoveDirectoryPrefix;
    // Reserved characters, forces escaping of any non-word (or digit), non-whitespace character.
    // It may be inefficient (we could just match (/[-[\]{}()*+?.,\\^$|#\s]/g), but this is future
    // proof.
    var reservedCharacterPattern = /[^\w\s\/]/g;
    var wildcardCharCodes = [42 /* asterisk */, 63 /* question */];
    function hasExtension(fileName) {
        return ts.stringContains(getBaseFileName(fileName), ".");
    }
    ts.hasExtension = hasExtension;
    ts.commonPackageFolders = ["node_modules", "bower_components", "jspm_packages"];
    var implicitExcludePathRegexPattern = "(?!(" + ts.commonPackageFolders.join("|") + ")(/|$))";
    var filesMatcher = {
        /**
         * Matches any single directory segment unless it is the last segment and a .min.js file
         * Breakdown:
         *  [^./]                   # matches everything up to the first . character (excluding directory separators)
         *  (\\.(?!min\\.js$))?     # matches . characters but not if they are part of the .min.js file extension
         */
        singleAsteriskRegexFragment: "([^./]|(\\.(?!min\\.js$))?)*",
        /**
         * Regex for the ** wildcard. Matches any number of subdirectories. When used for including
         * files or directories, does not match subdirectories that start with a . character
         */
        doubleAsteriskRegexFragment: "(/" + implicitExcludePathRegexPattern + "[^/.][^/]*)*?",
        replaceWildcardCharacter: function (match) { return replaceWildcardCharacter(match, filesMatcher.singleAsteriskRegexFragment); }
    };
    var directoriesMatcher = {
        singleAsteriskRegexFragment: "[^/]*",
        /**
         * Regex for the ** wildcard. Matches any number of subdirectories. When used for including
         * files or directories, does not match subdirectories that start with a . character
         */
        doubleAsteriskRegexFragment: "(/" + implicitExcludePathRegexPattern + "[^/.][^/]*)*?",
        replaceWildcardCharacter: function (match) { return replaceWildcardCharacter(match, directoriesMatcher.singleAsteriskRegexFragment); }
    };
    var excludeMatcher = {
        singleAsteriskRegexFragment: "[^/]*",
        doubleAsteriskRegexFragment: "(/.+?)?",
        replaceWildcardCharacter: function (match) { return replaceWildcardCharacter(match, excludeMatcher.singleAsteriskRegexFragment); }
    };
    var wildcardMatchers = {
        files: filesMatcher,
        directories: directoriesMatcher,
        exclude: excludeMatcher
    };
    function getRegularExpressionForWildcard(specs, basePath, usage) {
        var patterns = getRegularExpressionsForWildcards(specs, basePath, usage);
        if (!patterns || !patterns.length) {
            return undefined;
        }
        var pattern = patterns.map(function (pattern) { return "(" + pattern + ")"; }).join("|");
        // If excluding, match "foo/bar/baz...", but if including, only allow "foo".
        var terminator = usage === "exclude" ? "($|/)" : "$";
        return "^(" + pattern + ")" + terminator;
    }
    ts.getRegularExpressionForWildcard = getRegularExpressionForWildcard;
    function getRegularExpressionsForWildcards(specs, basePath, usage) {
        if (specs === undefined || specs.length === 0) {
            return undefined;
        }
        return ts.flatMap(specs, function (spec) {
            return spec && getSubPatternFromSpec(spec, basePath, usage, wildcardMatchers[usage]);
        });
    }
    /**
     * An "includes" path "foo" is implicitly a glob "foo/** /*" (without the space) if its last component has no extension,
     * and does not contain any glob characters itself.
     */
    function isImplicitGlob(lastPathComponent) {
        return !/[.*?]/.test(lastPathComponent);
    }
    ts.isImplicitGlob = isImplicitGlob;
    function getSubPatternFromSpec(spec, basePath, usage, _a) {
        var singleAsteriskRegexFragment = _a.singleAsteriskRegexFragment, doubleAsteriskRegexFragment = _a.doubleAsteriskRegexFragment, replaceWildcardCharacter = _a.replaceWildcardCharacter;
        var subpattern = "";
        var hasWrittenComponent = false;
        var components = getNormalizedPathComponents(spec, basePath);
        var lastComponent = ts.last(components);
        if (usage !== "exclude" && lastComponent === "**") {
            return undefined;
        }
        // getNormalizedPathComponents includes the separator for the root component.
        // We need to remove to create our regex correctly.
        components[0] = removeTrailingDirectorySeparator(components[0]);
        if (isImplicitGlob(lastComponent)) {
            components.push("**", "*");
        }
        var optionalCount = 0;
        for (var _i = 0, components_1 = components; _i < components_1.length; _i++) {
            var component = components_1[_i];
            if (component === "**") {
                subpattern += doubleAsteriskRegexFragment;
            }
            else {
                if (usage === "directories") {
                    subpattern += "(";
                    optionalCount++;
                }
                if (hasWrittenComponent) {
                    subpattern += ts.directorySeparator;
                }
                if (usage !== "exclude") {
                    var componentPattern = "";
                    // The * and ? wildcards should not match directories or files that start with . if they
                    // appear first in a component. Dotted directories and files can be included explicitly
                    // like so: **/.*/.*
                    if (component.charCodeAt(0) === 42 /* asterisk */) {
                        componentPattern += "([^./]" + singleAsteriskRegexFragment + ")?";
                        component = component.substr(1);
                    }
                    else if (component.charCodeAt(0) === 63 /* question */) {
                        componentPattern += "[^./]";
                        component = component.substr(1);
                    }
                    componentPattern += component.replace(reservedCharacterPattern, replaceWildcardCharacter);
                    // Patterns should not include subfolders like node_modules unless they are
                    // explicitly included as part of the path.
                    //
                    // As an optimization, if the component pattern is the same as the component,
                    // then there definitely were no wildcard characters and we do not need to
                    // add the exclusion pattern.
                    if (componentPattern !== component) {
                        subpattern += implicitExcludePathRegexPattern;
                    }
                    subpattern += componentPattern;
                }
                else {
                    subpattern += component.replace(reservedCharacterPattern, replaceWildcardCharacter);
                }
            }
            hasWrittenComponent = true;
        }
        while (optionalCount > 0) {
            subpattern += ")?";
            optionalCount--;
        }
        return subpattern;
    }
    function replaceWildcardCharacter(match, singleAsteriskRegexFragment) {
        return match === "*" ? singleAsteriskRegexFragment : match === "?" ? "[^/]" : "\\" + match;
    }
    /** @param path directory of the tsconfig.json */
    function getFileMatcherPatterns(path, excludes, includes, useCaseSensitiveFileNames, currentDirectory) {
        path = normalizePath(path);
        currentDirectory = normalizePath(currentDirectory);
        var absolutePath = combinePaths(currentDirectory, path);
        return {
            includeFilePatterns: ts.map(getRegularExpressionsForWildcards(includes, absolutePath, "files"), function (pattern) { return "^" + pattern + "$"; }),
            includeFilePattern: getRegularExpressionForWildcard(includes, absolutePath, "files"),
            includeDirectoryPattern: getRegularExpressionForWildcard(includes, absolutePath, "directories"),
            excludePattern: getRegularExpressionForWildcard(excludes, absolutePath, "exclude"),
            basePaths: getBasePaths(path, includes, useCaseSensitiveFileNames)
        };
    }
    ts.getFileMatcherPatterns = getFileMatcherPatterns;
    function getRegexFromPattern(pattern, useCaseSensitiveFileNames) {
        return new RegExp(pattern, useCaseSensitiveFileNames ? "" : "i");
    }
    ts.getRegexFromPattern = getRegexFromPattern;
    /** @param path directory of the tsconfig.json */
    function matchFiles(path, extensions, excludes, includes, useCaseSensitiveFileNames, currentDirectory, depth, getFileSystemEntries) {
        path = normalizePath(path);
        currentDirectory = normalizePath(currentDirectory);
        var patterns = getFileMatcherPatterns(path, excludes, includes, useCaseSensitiveFileNames, currentDirectory);
        var includeFileRegexes = patterns.includeFilePatterns && patterns.includeFilePatterns.map(function (pattern) { return getRegexFromPattern(pattern, useCaseSensitiveFileNames); });
        var includeDirectoryRegex = patterns.includeDirectoryPattern && getRegexFromPattern(patterns.includeDirectoryPattern, useCaseSensitiveFileNames);
        var excludeRegex = patterns.excludePattern && getRegexFromPattern(patterns.excludePattern, useCaseSensitiveFileNames);
        // Associate an array of results with each include regex. This keeps results in order of the "include" order.
        // If there are no "includes", then just put everything in results[0].
        var results = includeFileRegexes ? includeFileRegexes.map(function () { return []; }) : [[]];
        for (var _i = 0, _a = patterns.basePaths; _i < _a.length; _i++) {
            var basePath = _a[_i];
            visitDirectory(basePath, combinePaths(currentDirectory, basePath), depth);
        }
        return ts.flatten(results);
        function visitDirectory(path, absolutePath, depth) {
            var _a = getFileSystemEntries(path), files = _a.files, directories = _a.directories;
            var _loop_1 = function (current) {
                var name = combinePaths(path, current);
                var absoluteName = combinePaths(absolutePath, current);
                if (extensions && !ts.fileExtensionIsOneOf(name, extensions))
                    return "continue";
                if (excludeRegex && excludeRegex.test(absoluteName))
                    return "continue";
                if (!includeFileRegexes) {
                    results[0].push(name);
                }
                else {
                    var includeIndex = ts.findIndex(includeFileRegexes, function (re) { return re.test(absoluteName); });
                    if (includeIndex !== -1) {
                        results[includeIndex].push(name);
                    }
                }
            };
            for (var _i = 0, _b = ts.sort(files, ts.compareStringsCaseSensitive); _i < _b.length; _i++) {
                var current = _b[_i];
                _loop_1(current);
            }
            if (depth !== undefined) {
                depth--;
                if (depth === 0) {
                    return;
                }
            }
            for (var _c = 0, _d = ts.sort(directories, ts.compareStringsCaseSensitive); _c < _d.length; _c++) {
                var current = _d[_c];
                var name = combinePaths(path, current);
                var absoluteName = combinePaths(absolutePath, current);
                if ((!includeDirectoryRegex || includeDirectoryRegex.test(absoluteName)) &&
                    (!excludeRegex || !excludeRegex.test(absoluteName))) {
                    visitDirectory(name, absoluteName, depth);
                }
            }
        }
    }
    ts.matchFiles = matchFiles;
    /**
     * Computes the unique non-wildcard base paths amongst the provided include patterns.
     */
    function getBasePaths(path, includes, useCaseSensitiveFileNames) {
        // Storage for our results in the form of literal paths (e.g. the paths as written by the user).
        var basePaths = [path];
        if (includes) {
            // Storage for literal base paths amongst the include patterns.
            var includeBasePaths = [];
            for (var _i = 0, includes_1 = includes; _i < includes_1.length; _i++) {
                var include = includes_1[_i];
                // We also need to check the relative paths by converting them to absolute and normalizing
                // in case they escape the base path (e.g "..\somedirectory")
                var absolute = isRootedDiskPath(include) ? include : normalizePath(combinePaths(path, include));
                // Append the literal and canonical candidate base paths.
                includeBasePaths.push(getIncludeBasePath(absolute));
            }
            // Sort the offsets array using either the literal or canonical path representations.
            includeBasePaths.sort(ts.getStringComparer(!useCaseSensitiveFileNames));
            var _loop_2 = function (includeBasePath) {
                if (ts.every(basePaths, function (basePath) { return !containsPath(basePath, includeBasePath, path, !useCaseSensitiveFileNames); })) {
                    basePaths.push(includeBasePath);
                }
            };
            // Iterate over each include base path and include unique base paths that are not a
            // subpath of an existing base path
            for (var _a = 0, includeBasePaths_1 = includeBasePaths; _a < includeBasePaths_1.length; _a++) {
                var includeBasePath = includeBasePaths_1[_a];
                _loop_2(includeBasePath);
            }
        }
        return basePaths;
    }
    function getIncludeBasePath(absolute) {
        var wildcardOffset = ts.indexOfAnyCharCode(absolute, wildcardCharCodes);
        if (wildcardOffset < 0) {
            // No "*" or "?" in the path
            return !hasExtension(absolute)
                ? absolute
                : removeTrailingDirectorySeparator(getDirectoryPath(absolute));
        }
        return absolute.substring(0, absolute.lastIndexOf(ts.directorySeparator, wildcardOffset));
    }
    function ensureScriptKind(fileName, scriptKind) {
        // Using scriptKind as a condition handles both:
        // - 'scriptKind' is unspecified and thus it is `undefined`
        // - 'scriptKind' is set and it is `Unknown` (0)
        // If the 'scriptKind' is 'undefined' or 'Unknown' then we attempt
        // to get the ScriptKind from the file name. If it cannot be resolved
        // from the file name then the default 'TS' script kind is returned.
        return scriptKind || getScriptKindFromFileName(fileName) || 3 /* TS */;
    }
    ts.ensureScriptKind = ensureScriptKind;
    function getScriptKindFromFileName(fileName) {
        var ext = fileName.substr(fileName.lastIndexOf("."));
        switch (ext.toLowerCase()) {
            case ".js" /* Js */:
                return 1 /* JS */;
            case ".jsx" /* Jsx */:
                return 2 /* JSX */;
            case ".ts" /* Ts */:
                return 3 /* TS */;
            case ".tsx" /* Tsx */:
                return 4 /* TSX */;
            case ".json" /* Json */:
                return 6 /* JSON */;
            default:
                return 0 /* Unknown */;
        }
    }
    ts.getScriptKindFromFileName = getScriptKindFromFileName;
    /**
     *  List of supported extensions in order of file resolution precedence.
     */
    ts.supportedTypeScriptExtensions = [".ts" /* Ts */, ".tsx" /* Tsx */, ".d.ts" /* Dts */];
    /** Must have ".d.ts" first because if ".ts" goes first, that will be detected as the extension instead of ".d.ts". */
    ts.supportedTypescriptExtensionsForExtractExtension = [".d.ts" /* Dts */, ".ts" /* Ts */, ".tsx" /* Tsx */];
    ts.supportedJavascriptExtensions = [".js" /* Js */, ".jsx" /* Jsx */];
    var allSupportedExtensions = ts.supportedTypeScriptExtensions.concat(ts.supportedJavascriptExtensions);
    function getSupportedExtensions(options, extraFileExtensions) {
        var needJsExtensions = options && options.allowJs;
        if (!extraFileExtensions || extraFileExtensions.length === 0) {
            return needJsExtensions ? allSupportedExtensions : ts.supportedTypeScriptExtensions;
        }
        var extensions = (needJsExtensions ? allSupportedExtensions : ts.supportedTypeScriptExtensions).concat(ts.mapDefined(extraFileExtensions, function (x) { return x.scriptKind === 7 /* Deferred */ || needJsExtensions && isJavaScriptLike(x.scriptKind) ? x.extension : undefined; }));
        return ts.deduplicate(extensions, ts.equateStringsCaseSensitive, ts.compareStringsCaseSensitive);
    }
    ts.getSupportedExtensions = getSupportedExtensions;
    function isJavaScriptLike(scriptKind) {
        return scriptKind === 1 /* JS */ || scriptKind === 2 /* JSX */;
    }
    function hasJavaScriptFileExtension(fileName) {
        return ts.some(ts.supportedJavascriptExtensions, function (extension) { return ts.fileExtensionIs(fileName, extension); });
    }
    ts.hasJavaScriptFileExtension = hasJavaScriptFileExtension;
    function hasTypeScriptFileExtension(fileName) {
        return ts.some(ts.supportedTypeScriptExtensions, function (extension) { return ts.fileExtensionIs(fileName, extension); });
    }
    ts.hasTypeScriptFileExtension = hasTypeScriptFileExtension;
    function isSupportedSourceFileName(fileName, compilerOptions, extraFileExtensions) {
        if (!fileName) {
            return false;
        }
        for (var _i = 0, _a = getSupportedExtensions(compilerOptions, extraFileExtensions); _i < _a.length; _i++) {
            var extension = _a[_i];
            if (ts.fileExtensionIs(fileName, extension)) {
                return true;
            }
        }
        return false;
    }
    ts.isSupportedSourceFileName = isSupportedSourceFileName;
    /**
     * Extension boundaries by priority. Lower numbers indicate higher priorities, and are
     * aligned to the offset of the highest priority extension in the
     * allSupportedExtensions array.
     */
    var ExtensionPriority;
    (function (ExtensionPriority) {
        ExtensionPriority[ExtensionPriority["TypeScriptFiles"] = 0] = "TypeScriptFiles";
        ExtensionPriority[ExtensionPriority["DeclarationAndJavaScriptFiles"] = 2] = "DeclarationAndJavaScriptFiles";
        ExtensionPriority[ExtensionPriority["Highest"] = 0] = "Highest";
        ExtensionPriority[ExtensionPriority["Lowest"] = 2] = "Lowest";
    })(ExtensionPriority = ts.ExtensionPriority || (ts.ExtensionPriority = {}));
    function getExtensionPriority(path, supportedExtensions) {
        for (var i = supportedExtensions.length - 1; i >= 0; i--) {
            if (ts.fileExtensionIs(path, supportedExtensions[i])) {
                return adjustExtensionPriority(i, supportedExtensions);
            }
        }
        // If its not in the list of supported extensions, this is likely a
        // TypeScript file with a non-ts extension
        return 0 /* Highest */;
    }
    ts.getExtensionPriority = getExtensionPriority;
    /**
     * Adjusts an extension priority to be the highest priority within the same range.
     */
    function adjustExtensionPriority(extensionPriority, supportedExtensions) {
        if (extensionPriority < 2 /* DeclarationAndJavaScriptFiles */) {
            return 0 /* TypeScriptFiles */;
        }
        else if (extensionPriority < supportedExtensions.length) {
            return 2 /* DeclarationAndJavaScriptFiles */;
        }
        else {
            return supportedExtensions.length;
        }
    }
    ts.adjustExtensionPriority = adjustExtensionPriority;
    /**
     * Gets the next lowest extension priority for a given priority.
     */
    function getNextLowestExtensionPriority(extensionPriority, supportedExtensions) {
        if (extensionPriority < 2 /* DeclarationAndJavaScriptFiles */) {
            return 2 /* DeclarationAndJavaScriptFiles */;
        }
        else {
            return supportedExtensions.length;
        }
    }
    ts.getNextLowestExtensionPriority = getNextLowestExtensionPriority;
    var extensionsToRemove = [".d.ts" /* Dts */, ".ts" /* Ts */, ".js" /* Js */, ".tsx" /* Tsx */, ".jsx" /* Jsx */, ".json" /* Json */];
    function removeFileExtension(path) {
        for (var _i = 0, extensionsToRemove_1 = extensionsToRemove; _i < extensionsToRemove_1.length; _i++) {
            var ext = extensionsToRemove_1[_i];
            var extensionless = tryRemoveExtension(path, ext);
            if (extensionless !== undefined) {
                return extensionless;
            }
        }
        return path;
    }
    ts.removeFileExtension = removeFileExtension;
    function tryRemoveExtension(path, extension) {
        return ts.fileExtensionIs(path, extension) ? removeExtension(path, extension) : undefined;
    }
    ts.tryRemoveExtension = tryRemoveExtension;
    function removeExtension(path, extension) {
        return path.substring(0, path.length - extension.length);
    }
    ts.removeExtension = removeExtension;
    function changeExtension(path, newExtension) {
        return changeAnyExtension(path, newExtension, extensionsToRemove, /*ignoreCase*/ false);
    }
    ts.changeExtension = changeExtension;
    function changeAnyExtension(path, ext, extensions, ignoreCase) {
        var pathext = extensions !== undefined && ignoreCase !== undefined ? getAnyExtensionFromPath(path, extensions, ignoreCase) : getAnyExtensionFromPath(path);
        return pathext ? path.slice(0, path.length - pathext.length) + (ts.startsWith(ext, ".") ? ext : "." + ext) : path;
    }
    ts.changeAnyExtension = changeAnyExtension;
    var Debug;
    (function (Debug) {
        function showSymbol(symbol) {
            var symbolFlags = ts.SymbolFlags;
            return "{ flags: " + (symbolFlags ? showFlags(symbol.flags, symbolFlags) : symbol.flags) + "; declarations: " + ts.map(symbol.declarations, showSyntaxKind) + " }";
        }
        Debug.showSymbol = showSymbol;
        function showFlags(flags, flagsEnum) {
            var out = [];
            for (var pow = 0; pow <= 30; pow++) {
                var n = 1 << pow;
                if (flags & n) {
                    out.push(flagsEnum[n]);
                }
            }
            return out.join("|");
        }
        function showSyntaxKind(node) {
            var syntaxKind = ts.SyntaxKind;
            return syntaxKind ? syntaxKind[node.kind] : node.kind.toString();
        }
        Debug.showSyntaxKind = showSyntaxKind;
    })(Debug = ts.Debug || (ts.Debug = {}));
    function tryParsePattern(pattern) {
        // This should be verified outside of here and a proper error thrown.
        Debug.assert(hasZeroOrOneAsteriskCharacter(pattern));
        var indexOfStar = pattern.indexOf("*");
        return indexOfStar === -1 ? undefined : {
            prefix: pattern.substr(0, indexOfStar),
            suffix: pattern.substr(indexOfStar + 1)
        };
    }
    ts.tryParsePattern = tryParsePattern;
    function positionIsSynthesized(pos) {
        // This is a fast way of testing the following conditions:
        //  pos === undefined || pos === null || isNaN(pos) || pos < 0;
        return !(pos >= 0);
    }
    ts.positionIsSynthesized = positionIsSynthesized;
    /** True if an extension is one of the supported TypeScript extensions. */
    function extensionIsTypeScript(ext) {
        return ext === ".ts" /* Ts */ || ext === ".tsx" /* Tsx */ || ext === ".d.ts" /* Dts */;
    }
    ts.extensionIsTypeScript = extensionIsTypeScript;
    function resolutionExtensionIsTypeScriptOrJson(ext) {
        return extensionIsTypeScript(ext) || ext === ".json" /* Json */;
    }
    ts.resolutionExtensionIsTypeScriptOrJson = resolutionExtensionIsTypeScriptOrJson;
    /**
     * Gets the extension from a path.
     * Path must have a valid extension.
     */
    function extensionFromPath(path) {
        var ext = tryGetExtensionFromPath(path);
        return ext !== undefined ? ext : Debug.fail("File " + path + " has unknown extension.");
    }
    ts.extensionFromPath = extensionFromPath;
    function isAnySupportedFileExtension(path) {
        return tryGetExtensionFromPath(path) !== undefined;
    }
    ts.isAnySupportedFileExtension = isAnySupportedFileExtension;
    function tryGetExtensionFromPath(path) {
        return ts.find(ts.supportedTypescriptExtensionsForExtractExtension, function (e) { return ts.fileExtensionIs(path, e); }) || ts.find(ts.supportedJavascriptExtensions, function (e) { return ts.fileExtensionIs(path, e); });
    }
    ts.tryGetExtensionFromPath = tryGetExtensionFromPath;
    function getAnyExtensionFromPathWorker(path, extensions, stringEqualityComparer) {
        if (typeof extensions === "string")
            extensions = [extensions];
        for (var _i = 0, extensions_1 = extensions; _i < extensions_1.length; _i++) {
            var extension = extensions_1[_i];
            if (!ts.startsWith(extension, "."))
                extension = "." + extension;
            if (path.length >= extension.length && path.charAt(path.length - extension.length) === ".") {
                var pathExtension = path.slice(path.length - extension.length);
                if (stringEqualityComparer(pathExtension, extension)) {
                    return pathExtension;
                }
            }
        }
        return "";
    }
    function getAnyExtensionFromPath(path, extensions, ignoreCase) {
        // Retrieves any string from the final "." onwards from a base file name.
        // Unlike extensionFromPath, which throws an exception on unrecognized extensions.
        if (extensions) {
            return getAnyExtensionFromPathWorker(path, extensions, ignoreCase ? ts.equateStringsCaseInsensitive : ts.equateStringsCaseSensitive);
        }
        var baseFileName = getBaseFileName(path);
        var extensionIndex = baseFileName.lastIndexOf(".");
        if (extensionIndex >= 0) {
            return baseFileName.substring(extensionIndex);
        }
        return "";
    }
    ts.getAnyExtensionFromPath = getAnyExtensionFromPath;
    function isCheckJsEnabledForFile(sourceFile, compilerOptions) {
        return sourceFile.checkJsDirective ? sourceFile.checkJsDirective.enabled : compilerOptions.checkJs;
    }
    ts.isCheckJsEnabledForFile = isCheckJsEnabledForFile;
    ts.emptyFileSystemEntries = {
        files: ts.emptyArray,
        directories: ts.emptyArray
    };
    /**
     * patternStrings contains both pattern strings (containing "*") and regular strings.
     * Return an exact match if possible, or a pattern match, or undefined.
     * (These are verified by verifyCompilerOptions to have 0 or 1 "*" characters.)
     */
    function matchPatternOrExact(patternStrings, candidate) {
        var patterns = [];
        for (var _i = 0, patternStrings_1 = patternStrings; _i < patternStrings_1.length; _i++) {
            var patternString = patternStrings_1[_i];
            var pattern = tryParsePattern(patternString);
            if (pattern) {
                patterns.push(pattern);
            }
            else if (patternString === candidate) {
                // pattern was matched as is - no need to search further
                return patternString;
            }
        }
        return ts.findBestPatternMatch(patterns, function (_) { return _; }, candidate);
    }
    ts.matchPatternOrExact = matchPatternOrExact;
})(ts || (ts = {}));
var ts;
(function (ts) {
    var SignatureFlags;
    (function (SignatureFlags) {
        SignatureFlags[SignatureFlags["None"] = 0] = "None";
        SignatureFlags[SignatureFlags["Yield"] = 1] = "Yield";
        SignatureFlags[SignatureFlags["Await"] = 2] = "Await";
        SignatureFlags[SignatureFlags["Type"] = 4] = "Type";
        SignatureFlags[SignatureFlags["IgnoreMissingOpenBrace"] = 16] = "IgnoreMissingOpenBrace";
        SignatureFlags[SignatureFlags["JSDoc"] = 32] = "JSDoc";
    })(SignatureFlags || (SignatureFlags = {}));
    // tslint:disable variable-name
    var NodeConstructor;
    var TokenConstructor;
    var IdentifierConstructor;
    var SourceFileConstructor;
    // tslint:enable variable-name
    function createNode(kind, pos, end) {
        if (kind === 274 /* SourceFile */) {
            return new (SourceFileConstructor || (SourceFileConstructor = ts.objectAllocator.getSourceFileConstructor()))(kind, pos, end);
        }
        else if (kind === 71 /* Identifier */) {
            return new (IdentifierConstructor || (IdentifierConstructor = ts.objectAllocator.getIdentifierConstructor()))(kind, pos, end);
        }
        else if (!ts.isNodeKind(kind)) {
            return new (TokenConstructor || (TokenConstructor = ts.objectAllocator.getTokenConstructor()))(kind, pos, end);
        }
        else {
            return new (NodeConstructor || (NodeConstructor = ts.objectAllocator.getNodeConstructor()))(kind, pos, end);
        }
    }
    ts.createNode = createNode;
    function visitNode(cbNode, node) {
        return node && cbNode(node);
    }
    function visitNodes(cbNode, cbNodes, nodes) {
        if (nodes) {
            if (cbNodes) {
                return cbNodes(nodes);
            }
            for (var _i = 0, nodes_1 = nodes; _i < nodes_1.length; _i++) {
                var node = nodes_1[_i];
                var result = cbNode(node);
                if (result) {
                    return result;
                }
            }
        }
    }
    /*@internal*/
    function isJSDocLikeText(text, start) {
        return text.charCodeAt(start + 1) === 42 /* asterisk */ &&
            text.charCodeAt(start + 2) === 42 /* asterisk */ &&
            text.charCodeAt(start + 3) !== 47 /* slash */;
    }
    ts.isJSDocLikeText = isJSDocLikeText;
    /**
     * Invokes a callback for each child of the given node. The 'cbNode' callback is invoked for all child nodes
     * stored in properties. If a 'cbNodes' callback is specified, it is invoked for embedded arrays; otherwise,
     * embedded arrays are flattened and the 'cbNode' callback is invoked for each element. If a callback returns
     * a truthy value, iteration stops and that value is returned. Otherwise, undefined is returned.
     *
     * @param node a given node to visit its children
     * @param cbNode a callback to be invoked for all child nodes
     * @param cbNodes a callback to be invoked for embedded array
     *
     * @remarks `forEachChild` must visit the children of a node in the order
     * that they appear in the source code. The language service depends on this property to locate nodes by position.
     */
    function forEachChild(node, cbNode, cbNodes) {
        if (!node || node.kind <= 145 /* LastToken */) {
            return;
        }
        switch (node.kind) {
            case 146 /* QualifiedName */:
                return visitNode(cbNode, node.left) ||
                    visitNode(cbNode, node.right);
            case 148 /* TypeParameter */:
                return visitNode(cbNode, node.name) ||
                    visitNode(cbNode, node.constraint) ||
                    visitNode(cbNode, node.default) ||
                    visitNode(cbNode, node.expression);
            case 271 /* ShorthandPropertyAssignment */:
                return visitNodes(cbNode, cbNodes, node.decorators) ||
                    visitNodes(cbNode, cbNodes, node.modifiers) ||
                    visitNode(cbNode, node.name) ||
                    visitNode(cbNode, node.questionToken) ||
                    visitNode(cbNode, node.equalsToken) ||
                    visitNode(cbNode, node.objectAssignmentInitializer);
            case 272 /* SpreadAssignment */:
                return visitNode(cbNode, node.expression);
            case 149 /* Parameter */:
                return visitNodes(cbNode, cbNodes, node.decorators) ||
                    visitNodes(cbNode, cbNodes, node.modifiers) ||
                    visitNode(cbNode, node.dotDotDotToken) ||
                    visitNode(cbNode, node.name) ||
                    visitNode(cbNode, node.questionToken) ||
                    visitNode(cbNode, node.type) ||
                    visitNode(cbNode, node.initializer);
            case 152 /* PropertyDeclaration */:
                return visitNodes(cbNode, cbNodes, node.decorators) ||
                    visitNodes(cbNode, cbNodes, node.modifiers) ||
                    visitNode(cbNode, node.name) ||
                    visitNode(cbNode, node.questionToken) ||
                    visitNode(cbNode, node.exclamationToken) ||
                    visitNode(cbNode, node.type) ||
                    visitNode(cbNode, node.initializer);
            case 151 /* PropertySignature */:
                return visitNodes(cbNode, cbNodes, node.decorators) ||
                    visitNodes(cbNode, cbNodes, node.modifiers) ||
                    visitNode(cbNode, node.name) ||
                    visitNode(cbNode, node.questionToken) ||
                    visitNode(cbNode, node.type) ||
                    visitNode(cbNode, node.initializer);
            case 270 /* PropertyAssignment */:
                return visitNodes(cbNode, cbNodes, node.decorators) ||
                    visitNodes(cbNode, cbNodes, node.modifiers) ||
                    visitNode(cbNode, node.name) ||
                    visitNode(cbNode, node.questionToken) ||
                    visitNode(cbNode, node.initializer);
            case 232 /* VariableDeclaration */:
                return visitNodes(cbNode, cbNodes, node.decorators) ||
                    visitNodes(cbNode, cbNodes, node.modifiers) ||
                    visitNode(cbNode, node.name) ||
                    visitNode(cbNode, node.exclamationToken) ||
                    visitNode(cbNode, node.type) ||
                    visitNode(cbNode, node.initializer);
            case 182 /* BindingElement */:
                return visitNodes(cbNode, cbNodes, node.decorators) ||
                    visitNodes(cbNode, cbNodes, node.modifiers) ||
                    visitNode(cbNode, node.dotDotDotToken) ||
                    visitNode(cbNode, node.propertyName) ||
                    visitNode(cbNode, node.name) ||
                    visitNode(cbNode, node.initializer);
            case 163 /* FunctionType */:
            case 164 /* ConstructorType */:
            case 158 /* CallSignature */:
            case 159 /* ConstructSignature */:
            case 160 /* IndexSignature */:
                return visitNodes(cbNode, cbNodes, node.decorators) ||
                    visitNodes(cbNode, cbNodes, node.modifiers) ||
                    visitNodes(cbNode, cbNodes, node.typeParameters) ||
                    visitNodes(cbNode, cbNodes, node.parameters) ||
                    visitNode(cbNode, node.type);
            case 154 /* MethodDeclaration */:
            case 153 /* MethodSignature */:
            case 155 /* Constructor */:
            case 156 /* GetAccessor */:
            case 157 /* SetAccessor */:
            case 192 /* FunctionExpression */:
            case 234 /* FunctionDeclaration */:
            case 193 /* ArrowFunction */:
                return visitNodes(cbNode, cbNodes, node.decorators) ||
                    visitNodes(cbNode, cbNodes, node.modifiers) ||
                    visitNode(cbNode, node.asteriskToken) ||
                    visitNode(cbNode, node.name) ||
                    visitNode(cbNode, node.questionToken) ||
                    visitNodes(cbNode, cbNodes, node.typeParameters) ||
                    visitNodes(cbNode, cbNodes, node.parameters) ||
                    visitNode(cbNode, node.type) ||
                    visitNode(cbNode, node.equalsGreaterThanToken) ||
                    visitNode(cbNode, node.body);
            case 162 /* TypeReference */:
                return visitNode(cbNode, node.typeName) ||
                    visitNodes(cbNode, cbNodes, node.typeArguments);
            case 161 /* TypePredicate */:
                return visitNode(cbNode, node.parameterName) ||
                    visitNode(cbNode, node.type);
            case 165 /* TypeQuery */:
                return visitNode(cbNode, node.exprName);
            case 166 /* TypeLiteral */:
                return visitNodes(cbNode, cbNodes, node.members);
            case 167 /* ArrayType */:
                return visitNode(cbNode, node.elementType);
            case 168 /* TupleType */:
                return visitNodes(cbNode, cbNodes, node.elementTypes);
            case 169 /* UnionType */:
            case 170 /* IntersectionType */:
                return visitNodes(cbNode, cbNodes, node.types);
            case 171 /* ConditionalType */:
                return visitNode(cbNode, node.checkType) ||
                    visitNode(cbNode, node.extendsType) ||
                    visitNode(cbNode, node.trueType) ||
                    visitNode(cbNode, node.falseType);
            case 172 /* InferType */:
                return visitNode(cbNode, node.typeParameter);
            case 179 /* ImportType */:
                return visitNode(cbNode, node.argument) ||
                    visitNode(cbNode, node.qualifier) ||
                    visitNodes(cbNode, cbNodes, node.typeArguments);
            case 173 /* ParenthesizedType */:
            case 175 /* TypeOperator */:
                return visitNode(cbNode, node.type);
            case 176 /* IndexedAccessType */:
                return visitNode(cbNode, node.objectType) ||
                    visitNode(cbNode, node.indexType);
            case 177 /* MappedType */:
                return visitNode(cbNode, node.readonlyToken) ||
                    visitNode(cbNode, node.typeParameter) ||
                    visitNode(cbNode, node.questionToken) ||
                    visitNode(cbNode, node.type);
            case 178 /* LiteralType */:
                return visitNode(cbNode, node.literal);
            case 180 /* ObjectBindingPattern */:
            case 181 /* ArrayBindingPattern */:
                return visitNodes(cbNode, cbNodes, node.elements);
            case 183 /* ArrayLiteralExpression */:
                return visitNodes(cbNode, cbNodes, node.elements);
            case 184 /* ObjectLiteralExpression */:
                return visitNodes(cbNode, cbNodes, node.properties);
            case 185 /* PropertyAccessExpression */:
                return visitNode(cbNode, node.expression) ||
                    visitNode(cbNode, node.name);
            case 186 /* ElementAccessExpression */:
                return visitNode(cbNode, node.expression) ||
                    visitNode(cbNode, node.argumentExpression);
            case 187 /* CallExpression */:
            case 188 /* NewExpression */:
                return visitNode(cbNode, node.expression) ||
                    visitNodes(cbNode, cbNodes, node.typeArguments) ||
                    visitNodes(cbNode, cbNodes, node.arguments);
            case 189 /* TaggedTemplateExpression */:
                return visitNode(cbNode, node.tag) ||
                    visitNodes(cbNode, cbNodes, node.typeArguments) ||
                    visitNode(cbNode, node.template);
            case 190 /* TypeAssertionExpression */:
                return visitNode(cbNode, node.type) ||
                    visitNode(cbNode, node.expression);
            case 191 /* ParenthesizedExpression */:
                return visitNode(cbNode, node.expression);
            case 194 /* DeleteExpression */:
                return visitNode(cbNode, node.expression);
            case 195 /* TypeOfExpression */:
                return visitNode(cbNode, node.expression);
            case 196 /* VoidExpression */:
                return visitNode(cbNode, node.expression);
            case 198 /* PrefixUnaryExpression */:
                return visitNode(cbNode, node.operand);
            case 203 /* YieldExpression */:
                return visitNode(cbNode, node.asteriskToken) ||
                    visitNode(cbNode, node.expression);
            case 197 /* AwaitExpression */:
                return visitNode(cbNode, node.expression);
            case 199 /* PostfixUnaryExpression */:
                return visitNode(cbNode, node.operand);
            case 200 /* BinaryExpression */:
                return visitNode(cbNode, node.left) ||
                    visitNode(cbNode, node.operatorToken) ||
                    visitNode(cbNode, node.right);
            case 208 /* AsExpression */:
                return visitNode(cbNode, node.expression) ||
                    visitNode(cbNode, node.type);
            case 209 /* NonNullExpression */:
                return visitNode(cbNode, node.expression);
            case 210 /* MetaProperty */:
                return visitNode(cbNode, node.name);
            case 201 /* ConditionalExpression */:
                return visitNode(cbNode, node.condition) ||
                    visitNode(cbNode, node.questionToken) ||
                    visitNode(cbNode, node.whenTrue) ||
                    visitNode(cbNode, node.colonToken) ||
                    visitNode(cbNode, node.whenFalse);
            case 204 /* SpreadElement */:
                return visitNode(cbNode, node.expression);
            case 213 /* Block */:
            case 240 /* ModuleBlock */:
                return visitNodes(cbNode, cbNodes, node.statements);
            case 274 /* SourceFile */:
                return visitNodes(cbNode, cbNodes, node.statements) ||
                    visitNode(cbNode, node.endOfFileToken);
            case 214 /* VariableStatement */:
                return visitNodes(cbNode, cbNodes, node.decorators) ||
                    visitNodes(cbNode, cbNodes, node.modifiers) ||
                    visitNode(cbNode, node.declarationList);
            case 233 /* VariableDeclarationList */:
                return visitNodes(cbNode, cbNodes, node.declarations);
            case 216 /* ExpressionStatement */:
                return visitNode(cbNode, node.expression);
            case 217 /* IfStatement */:
                return visitNode(cbNode, node.expression) ||
                    visitNode(cbNode, node.thenStatement) ||
                    visitNode(cbNode, node.elseStatement);
            case 218 /* DoStatement */:
                return visitNode(cbNode, node.statement) ||
                    visitNode(cbNode, node.expression);
            case 219 /* WhileStatement */:
                return visitNode(cbNode, node.expression) ||
                    visitNode(cbNode, node.statement);
            case 220 /* ForStatement */:
                return visitNode(cbNode, node.initializer) ||
                    visitNode(cbNode, node.condition) ||
                    visitNode(cbNode, node.incrementor) ||
                    visitNode(cbNode, node.statement);
            case 221 /* ForInStatement */:
                return visitNode(cbNode, node.initializer) ||
                    visitNode(cbNode, node.expression) ||
                    visitNode(cbNode, node.statement);
            case 222 /* ForOfStatement */:
                return visitNode(cbNode, node.awaitModifier) ||
                    visitNode(cbNode, node.initializer) ||
                    visitNode(cbNode, node.expression) ||
                    visitNode(cbNode, node.statement);
            case 223 /* ContinueStatement */:
            case 224 /* BreakStatement */:
                return visitNode(cbNode, node.label);
            case 225 /* ReturnStatement */:
                return visitNode(cbNode, node.expression);
            case 226 /* WithStatement */:
                return visitNode(cbNode, node.expression) ||
                    visitNode(cbNode, node.statement);
            case 227 /* SwitchStatement */:
                return visitNode(cbNode, node.expression) ||
                    visitNode(cbNode, node.caseBlock);
            case 241 /* CaseBlock */:
                return visitNodes(cbNode, cbNodes, node.clauses);
            case 266 /* CaseClause */:
                return visitNode(cbNode, node.expression) ||
                    visitNodes(cbNode, cbNodes, node.statements);
            case 267 /* DefaultClause */:
                return visitNodes(cbNode, cbNodes, node.statements);
            case 228 /* LabeledStatement */:
                return visitNode(cbNode, node.label) ||
                    visitNode(cbNode, node.statement);
            case 229 /* ThrowStatement */:
                return visitNode(cbNode, node.expression);
            case 230 /* TryStatement */:
                return visitNode(cbNode, node.tryBlock) ||
                    visitNode(cbNode, node.catchClause) ||
                    visitNode(cbNode, node.finallyBlock);
            case 269 /* CatchClause */:
                return visitNode(cbNode, node.variableDeclaration) ||
                    visitNode(cbNode, node.block);
            case 150 /* Decorator */:
                return visitNode(cbNode, node.expression);
            case 235 /* ClassDeclaration */:
            case 205 /* ClassExpression */:
                return visitNodes(cbNode, cbNodes, node.decorators) ||
                    visitNodes(cbNode, cbNodes, node.modifiers) ||
                    visitNode(cbNode, node.name) ||
                    visitNodes(cbNode, cbNodes, node.typeParameters) ||
                    visitNodes(cbNode, cbNodes, node.heritageClauses) ||
                    visitNodes(cbNode, cbNodes, node.members);
            case 236 /* InterfaceDeclaration */:
                return visitNodes(cbNode, cbNodes, node.decorators) ||
                    visitNodes(cbNode, cbNodes, node.modifiers) ||
                    visitNode(cbNode, node.name) ||
                    visitNodes(cbNode, cbNodes, node.typeParameters) ||
                    visitNodes(cbNode, cbNodes, node.heritageClauses) ||
                    visitNodes(cbNode, cbNodes, node.members);
            case 237 /* TypeAliasDeclaration */:
                return visitNodes(cbNode, cbNodes, node.decorators) ||
                    visitNodes(cbNode, cbNodes, node.modifiers) ||
                    visitNode(cbNode, node.name) ||
                    visitNodes(cbNode, cbNodes, node.typeParameters) ||
                    visitNode(cbNode, node.type);
            case 238 /* EnumDeclaration */:
                return visitNodes(cbNode, cbNodes, node.decorators) ||
                    visitNodes(cbNode, cbNodes, node.modifiers) ||
                    visitNode(cbNode, node.name) ||
                    visitNodes(cbNode, cbNodes, node.members);
            case 273 /* EnumMember */:
                return visitNode(cbNode, node.name) ||
                    visitNode(cbNode, node.initializer);
            case 239 /* ModuleDeclaration */:
                return visitNodes(cbNode, cbNodes, node.decorators) ||
                    visitNodes(cbNode, cbNodes, node.modifiers) ||
                    visitNode(cbNode, node.name) ||
                    visitNode(cbNode, node.body);
            case 243 /* ImportEqualsDeclaration */:
                return visitNodes(cbNode, cbNodes, node.decorators) ||
                    visitNodes(cbNode, cbNodes, node.modifiers) ||
                    visitNode(cbNode, node.name) ||
                    visitNode(cbNode, node.moduleReference);
            case 244 /* ImportDeclaration */:
                return visitNodes(cbNode, cbNodes, node.decorators) ||
                    visitNodes(cbNode, cbNodes, node.modifiers) ||
                    visitNode(cbNode, node.importClause) ||
                    visitNode(cbNode, node.moduleSpecifier);
            case 245 /* ImportClause */:
                return visitNode(cbNode, node.name) ||
                    visitNode(cbNode, node.namedBindings);
            case 242 /* NamespaceExportDeclaration */:
                return visitNode(cbNode, node.name);
            case 246 /* NamespaceImport */:
                return visitNode(cbNode, node.name);
            case 247 /* NamedImports */:
            case 251 /* NamedExports */:
                return visitNodes(cbNode, cbNodes, node.elements);
            case 250 /* ExportDeclaration */:
                return visitNodes(cbNode, cbNodes, node.decorators) ||
                    visitNodes(cbNode, cbNodes, node.modifiers) ||
                    visitNode(cbNode, node.exportClause) ||
                    visitNode(cbNode, node.moduleSpecifier);
            case 248 /* ImportSpecifier */:
            case 252 /* ExportSpecifier */:
                return visitNode(cbNode, node.propertyName) ||
                    visitNode(cbNode, node.name);
            case 249 /* ExportAssignment */:
                return visitNodes(cbNode, cbNodes, node.decorators) ||
                    visitNodes(cbNode, cbNodes, node.modifiers) ||
                    visitNode(cbNode, node.expression);
            case 202 /* TemplateExpression */:
                return visitNode(cbNode, node.head) || visitNodes(cbNode, cbNodes, node.templateSpans);
            case 211 /* TemplateSpan */:
                return visitNode(cbNode, node.expression) || visitNode(cbNode, node.literal);
            case 147 /* ComputedPropertyName */:
                return visitNode(cbNode, node.expression);
            case 268 /* HeritageClause */:
                return visitNodes(cbNode, cbNodes, node.types);
            case 207 /* ExpressionWithTypeArguments */:
                return visitNode(cbNode, node.expression) ||
                    visitNodes(cbNode, cbNodes, node.typeArguments);
            case 254 /* ExternalModuleReference */:
                return visitNode(cbNode, node.expression);
            case 253 /* MissingDeclaration */:
                return visitNodes(cbNode, cbNodes, node.decorators);
            case 302 /* CommaListExpression */:
                return visitNodes(cbNode, cbNodes, node.elements);
            case 255 /* JsxElement */:
                return visitNode(cbNode, node.openingElement) ||
                    visitNodes(cbNode, cbNodes, node.children) ||
                    visitNode(cbNode, node.closingElement);
            case 259 /* JsxFragment */:
                return visitNode(cbNode, node.openingFragment) ||
                    visitNodes(cbNode, cbNodes, node.children) ||
                    visitNode(cbNode, node.closingFragment);
            case 256 /* JsxSelfClosingElement */:
            case 257 /* JsxOpeningElement */:
                return visitNode(cbNode, node.tagName) ||
                    visitNodes(cbNode, cbNodes, node.typeArguments) ||
                    visitNode(cbNode, node.attributes);
            case 263 /* JsxAttributes */:
                return visitNodes(cbNode, cbNodes, node.properties);
            case 262 /* JsxAttribute */:
                return visitNode(cbNode, node.name) ||
                    visitNode(cbNode, node.initializer);
            case 264 /* JsxSpreadAttribute */:
                return visitNode(cbNode, node.expression);
            case 265 /* JsxExpression */:
                return visitNode(cbNode, node.dotDotDotToken) ||
                    visitNode(cbNode, node.expression);
            case 258 /* JsxClosingElement */:
                return visitNode(cbNode, node.tagName);
            case 278 /* JSDocTypeExpression */:
                return visitNode(cbNode, node.type);
            case 282 /* JSDocNonNullableType */:
                return visitNode(cbNode, node.type);
            case 281 /* JSDocNullableType */:
                return visitNode(cbNode, node.type);
            case 283 /* JSDocOptionalType */:
                return visitNode(cbNode, node.type);
            case 284 /* JSDocFunctionType */:
                return visitNodes(cbNode, cbNodes, node.parameters) ||
                    visitNode(cbNode, node.type);
            case 285 /* JSDocVariadicType */:
                return visitNode(cbNode, node.type);
            case 286 /* JSDocComment */:
                return visitNodes(cbNode, cbNodes, node.tags);
            case 293 /* JSDocParameterTag */:
            case 298 /* JSDocPropertyTag */:
                if (node.isNameFirst) {
                    return visitNode(cbNode, node.name) ||
                        visitNode(cbNode, node.typeExpression);
                }
                else {
                    return visitNode(cbNode, node.typeExpression) ||
                        visitNode(cbNode, node.name);
                }
            case 294 /* JSDocReturnTag */:
                return visitNode(cbNode, node.typeExpression);
            case 295 /* JSDocTypeTag */:
                return visitNode(cbNode, node.typeExpression);
            case 290 /* JSDocAugmentsTag */:
                return visitNode(cbNode, node.class);
            case 296 /* JSDocTemplateTag */:
                return visitNodes(cbNode, cbNodes, node.typeParameters);
            case 297 /* JSDocTypedefTag */:
                if (node.typeExpression &&
                    node.typeExpression.kind === 278 /* JSDocTypeExpression */) {
                    return visitNode(cbNode, node.typeExpression) ||
                        visitNode(cbNode, node.fullName);
                }
                else {
                    return visitNode(cbNode, node.fullName) ||
                        visitNode(cbNode, node.typeExpression);
                }
            case 292 /* JSDocCallbackTag */:
                return visitNode(cbNode, node.fullName) ||
                    visitNode(cbNode, node.typeExpression);
            case 288 /* JSDocSignature */:
                return visitNodes(cbNode, cbNodes, node.decorators) ||
                    visitNodes(cbNode, cbNodes, node.modifiers) ||
                    visitNodes(cbNode, cbNodes, node.typeParameters) ||
                    visitNodes(cbNode, cbNodes, node.parameters) ||
                    visitNode(cbNode, node.type);
            case 287 /* JSDocTypeLiteral */:
                if (node.jsDocPropertyTags) {
                    for (var _i = 0, _a = node.jsDocPropertyTags; _i < _a.length; _i++) {
                        var tag = _a[_i];
                        visitNode(cbNode, tag);
                    }
                }
                return;
            case 301 /* PartiallyEmittedExpression */:
                return visitNode(cbNode, node.expression);
        }
    }
    ts.forEachChild = forEachChild;
    function createSourceFile(fileName, sourceText, languageVersion, setParentNodes, scriptKind) {
        if (setParentNodes === void 0) { setParentNodes = false; }
        ts.performance.mark("beforeParse");
        var result;
        if (languageVersion === 100 /* JSON */) {
            result = Parser.parseJsonText(fileName, sourceText, languageVersion, /*syntaxCursor*/ undefined, setParentNodes);
        }
        else {
            result = Parser.parseSourceFile(fileName, sourceText, languageVersion, /*syntaxCursor*/ undefined, setParentNodes, scriptKind);
        }
        ts.performance.mark("afterParse");
        ts.performance.measure("Parse", "beforeParse", "afterParse");
        return result;
    }
    ts.createSourceFile = createSourceFile;
    function parseIsolatedEntityName(text, languageVersion) {
        return Parser.parseIsolatedEntityName(text, languageVersion);
    }
    ts.parseIsolatedEntityName = parseIsolatedEntityName;
    /**
     * Parse json text into SyntaxTree and return node and parse errors if any
     * @param fileName
     * @param sourceText
     */
    function parseJsonText(fileName, sourceText) {
        return Parser.parseJsonText(fileName, sourceText);
    }
    ts.parseJsonText = parseJsonText;
    // See also `isExternalOrCommonJsModule` in utilities.ts
    function isExternalModule(file) {
        return file.externalModuleIndicator !== undefined;
    }
    ts.isExternalModule = isExternalModule;
    // Produces a new SourceFile for the 'newText' provided. The 'textChangeRange' parameter
    // indicates what changed between the 'text' that this SourceFile has and the 'newText'.
    // The SourceFile will be created with the compiler attempting to reuse as many nodes from
    // this file as possible.
    //
    // Note: this function mutates nodes from this SourceFile. That means any existing nodes
    // from this SourceFile that are being held onto may change as a result (including
    // becoming detached from any SourceFile).  It is recommended that this SourceFile not
    // be used once 'update' is called on it.
    function updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks) {
        if (aggressiveChecks === void 0) { aggressiveChecks = false; }
        var newSourceFile = IncrementalParser.updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks);
        // Because new source file node is created, it may not have the flag PossiblyContainDynamicImport. This is the case if there is no new edit to add dynamic import.
        // We will manually port the flag to the new source file.
        newSourceFile.flags |= (sourceFile.flags & 1572864 /* PermanentlySetIncrementalFlags */);
        return newSourceFile;
    }
    ts.updateSourceFile = updateSourceFile;
    /* @internal */
    function parseIsolatedJSDocComment(content, start, length) {
        var result = Parser.JSDocParser.parseIsolatedJSDocComment(content, start, length);
        if (result && result.jsDoc) {
            // because the jsDocComment was parsed out of the source file, it might
            // not be covered by the fixupParentReferences.
            Parser.fixupParentReferences(result.jsDoc);
        }
        return result;
    }
    ts.parseIsolatedJSDocComment = parseIsolatedJSDocComment;
    /* @internal */
    // Exposed only for testing.
    function parseJSDocTypeExpressionForTests(content, start, length) {
        return Parser.JSDocParser.parseJSDocTypeExpressionForTests(content, start, length);
    }
    ts.parseJSDocTypeExpressionForTests = parseJSDocTypeExpressionForTests;
    // Implement the parser as a singleton module.  We do this for perf reasons because creating
    // parser instances can actually be expensive enough to impact us on projects with many source
    // files.
    var Parser;
    (function (Parser) {
        // Share a single scanner across all calls to parse a source file.  This helps speed things
        // up by avoiding the cost of creating/compiling scanners over and over again.
        var scanner = ts.createScanner(6 /* Latest */, /*skipTrivia*/ true);
        var disallowInAndDecoratorContext = 2048 /* DisallowInContext */ | 8192 /* DecoratorContext */;
        // capture constructors in 'initializeState' to avoid null checks
        // tslint:disable variable-name
        var NodeConstructor;
        var TokenConstructor;
        var IdentifierConstructor;
        var SourceFileConstructor;
        // tslint:enable variable-name
        var sourceFile;
        var parseDiagnostics;
        var syntaxCursor;
        var currentToken;
        var sourceText;
        var nodeCount;
        var identifiers;
        var identifierCount;
        var parsingContext;
        // Flags that dictate what parsing context we're in.  For example:
        // Whether or not we are in strict parsing mode.  All that changes in strict parsing mode is
        // that some tokens that would be considered identifiers may be considered keywords.
        //
        // When adding more parser context flags, consider which is the more common case that the
        // flag will be in.  This should be the 'false' state for that flag.  The reason for this is
        // that we don't store data in our nodes unless the value is in the *non-default* state.  So,
        // for example, more often than code 'allows-in' (or doesn't 'disallow-in').  We opt for
        // 'disallow-in' set to 'false'.  Otherwise, if we had 'allowsIn' set to 'true', then almost
        // all nodes would need extra state on them to store this info.
        //
        // Note: 'allowIn' and 'allowYield' track 1:1 with the [in] and [yield] concepts in the ES6
        // grammar specification.
        //
        // An important thing about these context concepts.  By default they are effectively inherited
        // while parsing through every grammar production.  i.e. if you don't change them, then when
        // you parse a sub-production, it will have the same context values as the parent production.
        // This is great most of the time.  After all, consider all the 'expression' grammar productions
        // and how nearly all of them pass along the 'in' and 'yield' context values:
        //
        // EqualityExpression[In, Yield] :
        //      RelationalExpression[?In, ?Yield]
        //      EqualityExpression[?In, ?Yield] == RelationalExpression[?In, ?Yield]
        //      EqualityExpression[?In, ?Yield] != RelationalExpression[?In, ?Yield]
        //      EqualityExpression[?In, ?Yield] === RelationalExpression[?In, ?Yield]
        //      EqualityExpression[?In, ?Yield] !== RelationalExpression[?In, ?Yield]
        //
        // Where you have to be careful is then understanding what the points are in the grammar
        // where the values are *not* passed along.  For example:
        //
        // SingleNameBinding[Yield,GeneratorParameter]
        //      [+GeneratorParameter]BindingIdentifier[Yield] Initializer[In]opt
        //      [~GeneratorParameter]BindingIdentifier[?Yield]Initializer[In, ?Yield]opt
        //
        // Here this is saying that if the GeneratorParameter context flag is set, that we should
        // explicitly set the 'yield' context flag to false before calling into the BindingIdentifier
        // and we should explicitly unset the 'yield' context flag before calling into the Initializer.
        // production.  Conversely, if the GeneratorParameter context flag is not set, then we
        // should leave the 'yield' context flag alone.
        //
        // Getting this all correct is tricky and requires careful reading of the grammar to
        // understand when these values should be changed versus when they should be inherited.
        //
        // Note: it should not be necessary to save/restore these flags during speculative/lookahead
        // parsing.  These context flags are naturally stored and restored through normal recursive
        // descent parsing and unwinding.
        var contextFlags;
        // Whether or not we've had a parse error since creating the last AST node.  If we have
        // encountered an error, it will be stored on the next AST node we create.  Parse errors
        // can be broken down into three categories:
        //
        // 1) An error that occurred during scanning.  For example, an unterminated literal, or a
        //    character that was completely not understood.
        //
        // 2) A token was expected, but was not present.  This type of error is commonly produced
        //    by the 'parseExpected' function.
        //
        // 3) A token was present that no parsing function was able to consume.  This type of error
        //    only occurs in the 'abortParsingListOrMoveToNextToken' function when the parser
        //    decides to skip the token.
        //
        // In all of these cases, we want to mark the next node as having had an error before it.
        // With this mark, we can know in incremental settings if this node can be reused, or if
        // we have to reparse it.  If we don't keep this information around, we may just reuse the
        // node.  in that event we would then not produce the same errors as we did before, causing
        // significant confusion problems.
        //
        // Note: it is necessary that this value be saved/restored during speculative/lookahead
        // parsing.  During lookahead parsing, we will often create a node.  That node will have
        // this value attached, and then this value will be set back to 'false'.  If we decide to
        // rewind, we must get back to the same value we had prior to the lookahead.
        //
        // Note: any errors at the end of the file that do not precede a regular node, should get
        // attached to the EOF token.
        var parseErrorBeforeNextFinishedNode = false;
        function parseSourceFile(fileName, sourceText, languageVersion, syntaxCursor, setParentNodes, scriptKind) {
            if (setParentNodes === void 0) { setParentNodes = false; }
            scriptKind = ts.ensureScriptKind(fileName, scriptKind);
            if (scriptKind === 6 /* JSON */) {
                var result_1 = parseJsonText(fileName, sourceText, languageVersion, syntaxCursor, setParentNodes);
                ts.convertToObjectWorker(result_1, result_1.parseDiagnostics, /*returnValue*/ false, /*knownRootOptions*/ undefined, /*jsonConversionNotifier*/ undefined);
                result_1.typeReferenceDirectives = ts.emptyArray;
                result_1.amdDependencies = ts.emptyArray;
                return result_1;
            }
            initializeState(sourceText, languageVersion, syntaxCursor, scriptKind);
            var result = parseSourceFileWorker(fileName, languageVersion, setParentNodes, scriptKind);
            clearState();
            return result;
        }
        Parser.parseSourceFile = parseSourceFile;
        function parseIsolatedEntityName(content, languageVersion) {
            // Choice of `isDeclarationFile` should be arbitrary
            initializeState(content, languageVersion, /*syntaxCursor*/ undefined, 1 /* JS */);
            // Prime the scanner.
            nextToken();
            var entityName = parseEntityName(/*allowReservedWords*/ true);
            var isInvalid = token() === 1 /* EndOfFileToken */ && !parseDiagnostics.length;
            clearState();
            return isInvalid ? entityName : undefined;
        }
        Parser.parseIsolatedEntityName = parseIsolatedEntityName;
        function parseJsonText(fileName, sourceText, languageVersion, syntaxCursor, setParentNodes) {
            if (languageVersion === void 0) { languageVersion = 2 /* ES2015 */; }
            initializeState(sourceText, languageVersion, syntaxCursor, 6 /* JSON */);
            // Set source file so that errors will be reported with this file name
            sourceFile = createSourceFile(fileName, 2 /* ES2015 */, 6 /* JSON */, /*isDeclaration*/ false);
            sourceFile.flags = contextFlags;
            // Prime the scanner.
            nextToken();
            var pos = getNodePos();
            if (token() === 1 /* EndOfFileToken */) {
                sourceFile.statements = createNodeArray([], pos, pos);
                sourceFile.endOfFileToken = parseTokenNode();
            }
            else {
                var statement = createNode(216 /* ExpressionStatement */);
                switch (token()) {
                    case 21 /* OpenBracketToken */:
                        statement.expression = parseArrayLiteralExpression();
                        break;
                    case 101 /* TrueKeyword */:
                    case 86 /* FalseKeyword */:
                    case 95 /* NullKeyword */:
                        statement.expression = parseTokenNode();
                        break;
                    case 38 /* MinusToken */:
                        if (lookAhead(function () { return nextToken() === 8 /* NumericLiteral */ && nextToken() !== 56 /* ColonToken */; })) {
                            statement.expression = parsePrefixUnaryExpression();
                        }
                        else {
                            statement.expression = parseObjectLiteralExpression();
                        }
                        break;
                    case 8 /* NumericLiteral */:
                    case 9 /* StringLiteral */:
                        if (lookAhead(function () { return nextToken() !== 56 /* ColonToken */; })) {
                            statement.expression = parseLiteralNode();
                            break;
                        }
                    // falls through
                    default:
                        statement.expression = parseObjectLiteralExpression();
                        break;
                }
                finishNode(statement);
                sourceFile.statements = createNodeArray([statement], pos);
                sourceFile.endOfFileToken = parseExpectedToken(1 /* EndOfFileToken */, ts.Diagnostics.Unexpected_token);
            }
            if (setParentNodes) {
                fixupParentReferences(sourceFile);
            }
            sourceFile.parseDiagnostics = parseDiagnostics;
            var result = sourceFile;
            clearState();
            return result;
        }
        Parser.parseJsonText = parseJsonText;
        function getLanguageVariant(scriptKind) {
            // .tsx and .jsx files are treated as jsx language variant.
            return scriptKind === 4 /* TSX */ || scriptKind === 2 /* JSX */ || scriptKind === 1 /* JS */ || scriptKind === 6 /* JSON */ ? 1 /* JSX */ : 0 /* Standard */;
        }
        function initializeState(_sourceText, languageVersion, _syntaxCursor, scriptKind) {
            NodeConstructor = ts.objectAllocator.getNodeConstructor();
            TokenConstructor = ts.objectAllocator.getTokenConstructor();
            IdentifierConstructor = ts.objectAllocator.getIdentifierConstructor();
            SourceFileConstructor = ts.objectAllocator.getSourceFileConstructor();
            sourceText = _sourceText;
            syntaxCursor = _syntaxCursor;
            parseDiagnostics = [];
            parsingContext = 0;
            identifiers = ts.createMap();
            identifierCount = 0;
            nodeCount = 0;
            switch (scriptKind) {
                case 1 /* JS */:
                case 2 /* JSX */:
                    contextFlags = 65536 /* JavaScriptFile */;
                    break;
                case 6 /* JSON */:
                    contextFlags = 65536 /* JavaScriptFile */ | 16777216 /* JsonFile */;
                    break;
                default:
                    contextFlags = 0 /* None */;
                    break;
            }
            parseErrorBeforeNextFinishedNode = false;
            // Initialize and prime the scanner before parsing the source elements.
            scanner.setText(sourceText);
            scanner.setOnError(scanError);
            scanner.setScriptTarget(languageVersion);
            scanner.setLanguageVariant(getLanguageVariant(scriptKind));
        }
        function clearState() {
            // Clear out the text the scanner is pointing at, so it doesn't keep anything alive unnecessarily.
            scanner.setText("");
            scanner.setOnError(undefined);
            // Clear any data.  We don't want to accidentally hold onto it for too long.
            parseDiagnostics = undefined;
            sourceFile = undefined;
            identifiers = undefined;
            syntaxCursor = undefined;
            sourceText = undefined;
        }
        function parseSourceFileWorker(fileName, languageVersion, setParentNodes, scriptKind) {
            var isDeclarationFile = isDeclarationFileName(fileName);
            if (isDeclarationFile) {
                contextFlags |= 4194304 /* Ambient */;
            }
            sourceFile = createSourceFile(fileName, languageVersion, scriptKind, isDeclarationFile);
            sourceFile.flags = contextFlags;
            // Prime the scanner.
            nextToken();
            // A member of ReadonlyArray<T> isn't assignable to a member of T[] (and prevents a direct cast) - but this is where we set up those members so they can be readonly in the future
            processCommentPragmas(sourceFile, sourceText);
            processPragmasIntoFields(sourceFile, reportPragmaDiagnostic);
            sourceFile.statements = parseList(0 /* SourceElements */, parseStatement);
            ts.Debug.assert(token() === 1 /* EndOfFileToken */);
            sourceFile.endOfFileToken = addJSDocComment(parseTokenNode());
            setExternalModuleIndicator(sourceFile);
            sourceFile.nodeCount = nodeCount;
            sourceFile.identifierCount = identifierCount;
            sourceFile.identifiers = identifiers;
            sourceFile.parseDiagnostics = parseDiagnostics;
            if (setParentNodes) {
                fixupParentReferences(sourceFile);
            }
            return sourceFile;
            function reportPragmaDiagnostic(pos, end, diagnostic) {
                parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, pos, end, diagnostic));
            }
        }
        function addJSDocComment(node) {
            var comments = ts.getJSDocCommentRanges(node, sourceFile.text);
            if (comments) {
                for (var _i = 0, comments_2 = comments; _i < comments_2.length; _i++) {
                    var comment = comments_2[_i];
                    node.jsDoc = ts.append(node.jsDoc, JSDocParser.parseJSDocComment(node, comment.pos, comment.end - comment.pos));
                }
            }
            return node;
        }
        function fixupParentReferences(rootNode) {
            // normally parent references are set during binding. However, for clients that only need
            // a syntax tree, and no semantic features, then the binding process is an unnecessary
            // overhead.  This functions allows us to set all the parents, without all the expense of
            // binding.
            var parent = rootNode;
            forEachChild(rootNode, visitNode);
            return;
            function visitNode(n) {
                // walk down setting parents that differ from the parent we think it should be.  This
                // allows us to quickly bail out of setting parents for subtrees during incremental
                // parsing
                if (n.parent !== parent) {
                    n.parent = parent;
                    var saveParent = parent;
                    parent = n;
                    forEachChild(n, visitNode);
                    if (ts.hasJSDocNodes(n)) {
                        for (var _i = 0, _a = n.jsDoc; _i < _a.length; _i++) {
                            var jsDoc = _a[_i];
                            jsDoc.parent = n;
                            parent = jsDoc;
                            forEachChild(jsDoc, visitNode);
                        }
                    }
                    parent = saveParent;
                }
            }
        }
        Parser.fixupParentReferences = fixupParentReferences;
        function createSourceFile(fileName, languageVersion, scriptKind, isDeclarationFile) {
            // code from createNode is inlined here so createNode won't have to deal with special case of creating source files
            // this is quite rare comparing to other nodes and createNode should be as fast as possible
            var sourceFile = new SourceFileConstructor(274 /* SourceFile */, /*pos*/ 0, /* end */ sourceText.length);
            nodeCount++;
            sourceFile.text = sourceText;
            sourceFile.bindDiagnostics = [];
            sourceFile.bindSuggestionDiagnostics = undefined;
            sourceFile.languageVersion = languageVersion;
            sourceFile.fileName = ts.normalizePath(fileName);
            sourceFile.languageVariant = getLanguageVariant(scriptKind);
            sourceFile.isDeclarationFile = isDeclarationFile;
            sourceFile.scriptKind = scriptKind;
            return sourceFile;
        }
        function setContextFlag(val, flag) {
            if (val) {
                contextFlags |= flag;
            }
            else {
                contextFlags &= ~flag;
            }
        }
        function setDisallowInContext(val) {
            setContextFlag(val, 2048 /* DisallowInContext */);
        }
        function setYieldContext(val) {
            setContextFlag(val, 4096 /* YieldContext */);
        }
        function setDecoratorContext(val) {
            setContextFlag(val, 8192 /* DecoratorContext */);
        }
        function setAwaitContext(val) {
            setContextFlag(val, 16384 /* AwaitContext */);
        }
        function doOutsideOfContext(context, func) {
            // contextFlagsToClear will contain only the context flags that are
            // currently set that we need to temporarily clear
            // We don't just blindly reset to the previous flags to ensure
            // that we do not mutate cached flags for the incremental
            // parser (ThisNodeHasError, ThisNodeOrAnySubNodesHasError, and
            // HasAggregatedChildData).
            var contextFlagsToClear = context & contextFlags;
            if (contextFlagsToClear) {
                // clear the requested context flags
                setContextFlag(/*val*/ false, contextFlagsToClear);
                var result = func();
                // restore the context flags we just cleared
                setContextFlag(/*val*/ true, contextFlagsToClear);
                return result;
            }
            // no need to do anything special as we are not in any of the requested contexts
            return func();
        }
        function doInsideOfContext(context, func) {
            // contextFlagsToSet will contain only the context flags that
            // are not currently set that we need to temporarily enable.
            // We don't just blindly reset to the previous flags to ensure
            // that we do not mutate cached flags for the incremental
            // parser (ThisNodeHasError, ThisNodeOrAnySubNodesHasError, and
            // HasAggregatedChildData).
            var contextFlagsToSet = context & ~contextFlags;
            if (contextFlagsToSet) {
                // set the requested context flags
                setContextFlag(/*val*/ true, contextFlagsToSet);
                var result = func();
                // reset the context flags we just set
                setContextFlag(/*val*/ false, contextFlagsToSet);
                return result;
            }
            // no need to do anything special as we are already in all of the requested contexts
            return func();
        }
        function allowInAnd(func) {
            return doOutsideOfContext(2048 /* DisallowInContext */, func);
        }
        function disallowInAnd(func) {
            return doInsideOfContext(2048 /* DisallowInContext */, func);
        }
        function doInYieldContext(func) {
            return doInsideOfContext(4096 /* YieldContext */, func);
        }
        function doInDecoratorContext(func) {
            return doInsideOfContext(8192 /* DecoratorContext */, func);
        }
        function doInAwaitContext(func) {
            return doInsideOfContext(16384 /* AwaitContext */, func);
        }
        function doOutsideOfAwaitContext(func) {
            return doOutsideOfContext(16384 /* AwaitContext */, func);
        }
        function doInYieldAndAwaitContext(func) {
            return doInsideOfContext(4096 /* YieldContext */ | 16384 /* AwaitContext */, func);
        }
        function inContext(flags) {
            return (contextFlags & flags) !== 0;
        }
        function inYieldContext() {
            return inContext(4096 /* YieldContext */);
        }
        function inDisallowInContext() {
            return inContext(2048 /* DisallowInContext */);
        }
        function inDecoratorContext() {
            return inContext(8192 /* DecoratorContext */);
        }
        function inAwaitContext() {
            return inContext(16384 /* AwaitContext */);
        }
        function parseErrorAtCurrentToken(message, arg0) {
            parseErrorAt(scanner.getTokenPos(), scanner.getTextPos(), message, arg0);
        }
        function parseErrorAtPosition(start, length, message, arg0) {
            // Don't report another error if it would just be at the same position as the last error.
            var lastError = ts.lastOrUndefined(parseDiagnostics);
            if (!lastError || start !== lastError.start) {
                parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, start, length, message, arg0));
            }
            // Mark that we've encountered an error.  We'll set an appropriate bit on the next
            // node we finish so that it can't be reused incrementally.
            parseErrorBeforeNextFinishedNode = true;
        }
        function parseErrorAt(start, end, message, arg0) {
            parseErrorAtPosition(start, end - start, message, arg0);
        }
        function parseErrorAtRange(range, message, arg0) {
            parseErrorAt(range.pos, range.end, message, arg0);
        }
        function scanError(message, length) {
            parseErrorAtPosition(scanner.getTextPos(), length, message);
        }
        function getNodePos() {
            return scanner.getStartPos();
        }
        // Use this function to access the current token instead of reading the currentToken
        // variable. Since function results aren't narrowed in control flow analysis, this ensures
        // that the type checker doesn't make wrong assumptions about the type of the current
        // token (e.g. a call to nextToken() changes the current token but the checker doesn't
        // reason about this side effect).  Mainstream VMs inline simple functions like this, so
        // there is no performance penalty.
        function token() {
            return currentToken;
        }
        function nextToken() {
            return currentToken = scanner.scan();
        }
        function reScanGreaterToken() {
            return currentToken = scanner.reScanGreaterToken();
        }
        function reScanSlashToken() {
            return currentToken = scanner.reScanSlashToken();
        }
        function reScanTemplateToken() {
            return currentToken = scanner.reScanTemplateToken();
        }
        function scanJsxIdentifier() {
            return currentToken = scanner.scanJsxIdentifier();
        }
        function scanJsxText() {
            return currentToken = scanner.scanJsxToken();
        }
        function scanJsxAttributeValue() {
            return currentToken = scanner.scanJsxAttributeValue();
        }
        function speculationHelper(callback, isLookAhead) {
            // Keep track of the state we'll need to rollback to if lookahead fails (or if the
            // caller asked us to always reset our state).
            var saveToken = currentToken;
            var saveParseDiagnosticsLength = parseDiagnostics.length;
            var saveParseErrorBeforeNextFinishedNode = parseErrorBeforeNextFinishedNode;
            // Note: it is not actually necessary to save/restore the context flags here.  That's
            // because the saving/restoring of these flags happens naturally through the recursive
            // descent nature of our parser.  However, we still store this here just so we can
            // assert that invariant holds.
            var saveContextFlags = contextFlags;
            // If we're only looking ahead, then tell the scanner to only lookahead as well.
            // Otherwise, if we're actually speculatively parsing, then tell the scanner to do the
            // same.
            var result = isLookAhead
                ? scanner.lookAhead(callback)
                : scanner.tryScan(callback);
            ts.Debug.assert(saveContextFlags === contextFlags);
            // If our callback returned something 'falsy' or we're just looking ahead,
            // then unconditionally restore us to where we were.
            if (!result || isLookAhead) {
                currentToken = saveToken;
                parseDiagnostics.length = saveParseDiagnosticsLength;
                parseErrorBeforeNextFinishedNode = saveParseErrorBeforeNextFinishedNode;
            }
            return result;
        }
        /** Invokes the provided callback then unconditionally restores the parser to the state it
         * was in immediately prior to invoking the callback.  The result of invoking the callback
         * is returned from this function.
         */
        function lookAhead(callback) {
            return speculationHelper(callback, /*isLookAhead*/ true);
        }
        /** Invokes the provided callback.  If the callback returns something falsy, then it restores
         * the parser to the state it was in immediately prior to invoking the callback.  If the
         * callback returns something truthy, then the parser state is not rolled back.  The result
         * of invoking the callback is returned from this function.
         */
        function tryParse(callback) {
            return speculationHelper(callback, /*isLookAhead*/ false);
        }
        // Ignore strict mode flag because we will report an error in type checker instead.
        function isIdentifier() {
            if (token() === 71 /* Identifier */) {
                return true;
            }
            // If we have a 'yield' keyword, and we're in the [yield] context, then 'yield' is
            // considered a keyword and is not an identifier.
            if (token() === 116 /* YieldKeyword */ && inYieldContext()) {
                return false;
            }
            // If we have a 'await' keyword, and we're in the [Await] context, then 'await' is
            // considered a keyword and is not an identifier.
            if (token() === 121 /* AwaitKeyword */ && inAwaitContext()) {
                return false;
            }
            return token() > 107 /* LastReservedWord */;
        }
        function parseExpected(kind, diagnosticMessage, shouldAdvance) {
            if (shouldAdvance === void 0) { shouldAdvance = true; }
            if (token() === kind) {
                if (shouldAdvance) {
                    nextToken();
                }
                return true;
            }
            // Report specific message if provided with one.  Otherwise, report generic fallback message.
            if (diagnosticMessage) {
                parseErrorAtCurrentToken(diagnosticMessage);
            }
            else {
                parseErrorAtCurrentToken(ts.Diagnostics._0_expected, ts.tokenToString(kind));
            }
            return false;
        }
        function parseOptional(t) {
            if (token() === t) {
                nextToken();
                return true;
            }
            return false;
        }
        function parseOptionalToken(t) {
            if (token() === t) {
                return parseTokenNode();
            }
            return undefined;
        }
        function parseExpectedToken(t, diagnosticMessage, arg0) {
            return parseOptionalToken(t) ||
                createMissingNode(t, /*reportAtCurrentPosition*/ false, diagnosticMessage || ts.Diagnostics._0_expected, arg0 || ts.tokenToString(t));
        }
        function parseTokenNode() {
            var node = createNode(token());
            nextToken();
            return finishNode(node);
        }
        function canParseSemicolon() {
            // If there's a real semicolon, then we can always parse it out.
            if (token() === 25 /* SemicolonToken */) {
                return true;
            }
            // We can parse out an optional semicolon in ASI cases in the following cases.
            return token() === 18 /* CloseBraceToken */ || token() === 1 /* EndOfFileToken */ || scanner.hasPrecedingLineBreak();
        }
        function parseSemicolon() {
            if (canParseSemicolon()) {
                if (token() === 25 /* SemicolonToken */) {
                    // consume the semicolon if it was explicitly provided.
                    nextToken();
                }
                return true;
            }
            else {
                return parseExpected(25 /* SemicolonToken */);
            }
        }
        function createNode(kind, pos) {
            nodeCount++;
            var p = pos >= 0 ? pos : scanner.getStartPos();
            return ts.isNodeKind(kind) || kind === 0 /* Unknown */ ? new NodeConstructor(kind, p, p) :
                kind === 71 /* Identifier */ ? new IdentifierConstructor(kind, p, p) :
                    new TokenConstructor(kind, p, p);
        }
        function createNodeWithJSDoc(kind, pos) {
            var node = createNode(kind, pos);
            if (scanner.getTokenFlags() & 2 /* PrecedingJSDocComment */) {
                addJSDocComment(node);
            }
            return node;
        }
        function createNodeArray(elements, pos, end) {
            // Since the element list of a node array is typically created by starting with an empty array and
            // repeatedly calling push(), the list may not have the optimal memory layout. We invoke slice() for
            // small arrays (1 to 4 elements) to give the VM a chance to allocate an optimal representation.
            var length = elements.length;
            var array = (length >= 1 && length <= 4 ? elements.slice() : elements);
            array.pos = pos;
            array.end = end === undefined ? scanner.getStartPos() : end;
            return array;
        }
        function finishNode(node, end) {
            node.end = end === undefined ? scanner.getStartPos() : end;
            if (contextFlags) {
                node.flags |= contextFlags;
            }
            // Keep track on the node if we encountered an error while parsing it.  If we did, then
            // we cannot reuse the node incrementally.  Once we've marked this node, clear out the
            // flag so that we don't mark any subsequent nodes.
            if (parseErrorBeforeNextFinishedNode) {
                parseErrorBeforeNextFinishedNode = false;
                node.flags |= 32768 /* ThisNodeHasError */;
            }
            return node;
        }
        function createMissingNode(kind, reportAtCurrentPosition, diagnosticMessage, arg0) {
            if (reportAtCurrentPosition) {
                parseErrorAtPosition(scanner.getStartPos(), 0, diagnosticMessage, arg0);
            }
            else if (diagnosticMessage) {
                parseErrorAtCurrentToken(diagnosticMessage, arg0);
            }
            var result = createNode(kind);
            if (kind === 71 /* Identifier */) {
                result.escapedText = "";
            }
            else if (ts.isLiteralKind(kind) || ts.isTemplateLiteralKind(kind)) {
                result.text = "";
            }
            return finishNode(result);
        }
        function internIdentifier(text) {
            var identifier = identifiers.get(text);
            if (identifier === undefined) {
                identifiers.set(text, identifier = text);
            }
            return identifier;
        }
        // An identifier that starts with two underscores has an extra underscore character prepended to it to avoid issues
        // with magic property names like '__proto__'. The 'identifiers' object is used to share a single string instance for
        // each identifier in order to reduce memory consumption.
        function createIdentifier(isIdentifier, diagnosticMessage) {
            identifierCount++;
            if (isIdentifier) {
                var node = createNode(71 /* Identifier */);
                // Store original token kind if it is not just an Identifier so we can report appropriate error later in type checker
                if (token() !== 71 /* Identifier */) {
                    node.originalKeywordKind = token();
                }
                node.escapedText = ts.escapeLeadingUnderscores(internIdentifier(scanner.getTokenValue()));
                nextToken();
                return finishNode(node);
            }
            // Only for end of file because the error gets reported incorrectly on embedded script tags.
            var reportAtCurrentPosition = token() === 1 /* EndOfFileToken */;
            return createMissingNode(71 /* Identifier */, reportAtCurrentPosition, diagnosticMessage || ts.Diagnostics.Identifier_expected);
        }
        function parseIdentifier(diagnosticMessage) {
            return createIdentifier(isIdentifier(), diagnosticMessage);
        }
        function parseIdentifierName(diagnosticMessage) {
            return createIdentifier(ts.tokenIsIdentifierOrKeyword(token()), diagnosticMessage);
        }
        function isLiteralPropertyName() {
            return ts.tokenIsIdentifierOrKeyword(token()) ||
                token() === 9 /* StringLiteral */ ||
                token() === 8 /* NumericLiteral */;
        }
        function parsePropertyNameWorker(allowComputedPropertyNames) {
            if (token() === 9 /* StringLiteral */ || token() === 8 /* NumericLiteral */) {
                var node = parseLiteralNode();
                node.text = internIdentifier(node.text);
                return node;
            }
            if (allowComputedPropertyNames && token() === 21 /* OpenBracketToken */) {
                return parseComputedPropertyName();
            }
            return parseIdentifierName();
        }
        function parsePropertyName() {
            return parsePropertyNameWorker(/*allowComputedPropertyNames*/ true);
        }
        function parseComputedPropertyName() {
            // PropertyName [Yield]:
            //      LiteralPropertyName
            //      ComputedPropertyName[?Yield]
            var node = createNode(147 /* ComputedPropertyName */);
            parseExpected(21 /* OpenBracketToken */);
            // We parse any expression (including a comma expression). But the grammar
            // says that only an assignment expression is allowed, so the grammar checker
            // will error if it sees a comma expression.
            node.expression = allowInAnd(parseExpression);
            parseExpected(22 /* CloseBracketToken */);
            return finishNode(node);
        }
        function parseContextualModifier(t) {
            return token() === t && tryParse(nextTokenCanFollowModifier);
        }
        function nextTokenIsOnSameLineAndCanFollowModifier() {
            nextToken();
            if (scanner.hasPrecedingLineBreak()) {
                return false;
            }
            return canFollowModifier();
        }
        function nextTokenCanFollowModifier() {
            switch (token()) {
                case 76 /* ConstKeyword */:
                    // 'const' is only a modifier if followed by 'enum'.
                    return nextToken() === 83 /* EnumKeyword */;
                case 84 /* ExportKeyword */:
                    nextToken();
                    if (token() === 79 /* DefaultKeyword */) {
                        return lookAhead(nextTokenCanFollowDefaultKeyword);
                    }
                    return token() !== 39 /* AsteriskToken */ && token() !== 118 /* AsKeyword */ && token() !== 17 /* OpenBraceToken */ && canFollowModifier();
                case 79 /* DefaultKeyword */:
                    return nextTokenCanFollowDefaultKeyword();
                case 115 /* StaticKeyword */:
                case 125 /* GetKeyword */:
                case 136 /* SetKeyword */:
                    nextToken();
                    return canFollowModifier();
                default:
                    return nextTokenIsOnSameLineAndCanFollowModifier();
            }
        }
        function parseAnyContextualModifier() {
            return ts.isModifierKind(token()) && tryParse(nextTokenCanFollowModifier);
        }
        function canFollowModifier() {
            return token() === 21 /* OpenBracketToken */
                || token() === 17 /* OpenBraceToken */
                || token() === 39 /* AsteriskToken */
                || token() === 24 /* DotDotDotToken */
                || isLiteralPropertyName();
        }
        function nextTokenCanFollowDefaultKeyword() {
            nextToken();
            return token() === 75 /* ClassKeyword */ || token() === 89 /* FunctionKeyword */ ||
                token() === 109 /* InterfaceKeyword */ ||
                (token() === 117 /* AbstractKeyword */ && lookAhead(nextTokenIsClassKeywordOnSameLine)) ||
                (token() === 120 /* AsyncKeyword */ && lookAhead(nextTokenIsFunctionKeywordOnSameLine));
        }
        // True if positioned at the start of a list element
        function isListElement(parsingContext, inErrorRecovery) {
            var node = currentNode(parsingContext);
            if (node) {
                return true;
            }
            switch (parsingContext) {
                case 0 /* SourceElements */:
                case 1 /* BlockStatements */:
                case 3 /* SwitchClauseStatements */:
                    // If we're in error recovery, then we don't want to treat ';' as an empty statement.
                    // The problem is that ';' can show up in far too many contexts, and if we see one
                    // and assume it's a statement, then we may bail out inappropriately from whatever
                    // we're parsing.  For example, if we have a semicolon in the middle of a class, then
                    // we really don't want to assume the class is over and we're on a statement in the
                    // outer module.  We just want to consume and move on.
                    return !(token() === 25 /* SemicolonToken */ && inErrorRecovery) && isStartOfStatement();
                case 2 /* SwitchClauses */:
                    return token() === 73 /* CaseKeyword */ || token() === 79 /* DefaultKeyword */;
                case 4 /* TypeMembers */:
                    return lookAhead(isTypeMemberStart);
                case 5 /* ClassMembers */:
                    // We allow semicolons as class elements (as specified by ES6) as long as we're
                    // not in error recovery.  If we're in error recovery, we don't want an errant
                    // semicolon to be treated as a class member (since they're almost always used
                    // for statements.
                    return lookAhead(isClassMemberStart) || (token() === 25 /* SemicolonToken */ && !inErrorRecovery);
                case 6 /* EnumMembers */:
                    // Include open bracket computed properties. This technically also lets in indexers,
                    // which would be a candidate for improved error reporting.
                    return token() === 21 /* OpenBracketToken */ || isLiteralPropertyName();
                case 12 /* ObjectLiteralMembers */:
                    return token() === 21 /* OpenBracketToken */ || token() === 39 /* AsteriskToken */ || token() === 24 /* DotDotDotToken */ || isLiteralPropertyName();
                case 17 /* RestProperties */:
                    return isLiteralPropertyName();
                case 9 /* ObjectBindingElements */:
                    return token() === 21 /* OpenBracketToken */ || token() === 24 /* DotDotDotToken */ || isLiteralPropertyName();
                case 7 /* HeritageClauseElement */:
                    // If we see `{ ... }` then only consume it as an expression if it is followed by `,` or `{`
                    // That way we won't consume the body of a class in its heritage clause.
                    if (token() === 17 /* OpenBraceToken */) {
                        return lookAhead(isValidHeritageClauseObjectLiteral);
                    }
                    if (!inErrorRecovery) {
                        return isStartOfLeftHandSideExpression() && !isHeritageClauseExtendsOrImplementsKeyword();
                    }
                    else {
                        // If we're in error recovery we tighten up what we're willing to match.
                        // That way we don't treat something like "this" as a valid heritage clause
                        // element during recovery.
                        return isIdentifier() && !isHeritageClauseExtendsOrImplementsKeyword();
                    }
                case 8 /* VariableDeclarations */:
                    return isIdentifierOrPattern();
                case 10 /* ArrayBindingElements */:
                    return token() === 26 /* CommaToken */ || token() === 24 /* DotDotDotToken */ || isIdentifierOrPattern();
                case 18 /* TypeParameters */:
                    return isIdentifier();
                case 15 /* ArrayLiteralMembers */:
                    if (token() === 26 /* CommaToken */) {
                        return true;
                    }
                // falls through
                case 11 /* ArgumentExpressions */:
                    return token() === 24 /* DotDotDotToken */ || isStartOfExpression();
                case 16 /* Parameters */:
                    return isStartOfParameter();
                case 19 /* TypeArguments */:
                case 20 /* TupleElementTypes */:
                    return token() === 26 /* CommaToken */ || isStartOfType();
                case 21 /* HeritageClauses */:
                    return isHeritageClause();
                case 22 /* ImportOrExportSpecifiers */:
                    return ts.tokenIsIdentifierOrKeyword(token());
                case 13 /* JsxAttributes */:
                    return ts.tokenIsIdentifierOrKeyword(token()) || token() === 17 /* OpenBraceToken */;
                case 14 /* JsxChildren */:
                    return true;
            }
            return ts.Debug.fail("Non-exhaustive case in 'isListElement'.");
        }
        function isValidHeritageClauseObjectLiteral() {
            ts.Debug.assert(token() === 17 /* OpenBraceToken */);
            if (nextToken() === 18 /* CloseBraceToken */) {
                // if we see "extends {}" then only treat the {} as what we're extending (and not
                // the class body) if we have:
                //
                //      extends {} {
                //      extends {},
                //      extends {} extends
                //      extends {} implements
                var next = nextToken();
                return next === 26 /* CommaToken */ || next === 17 /* OpenBraceToken */ || next === 85 /* ExtendsKeyword */ || next === 108 /* ImplementsKeyword */;
            }
            return true;
        }
        function nextTokenIsIdentifier() {
            nextToken();
            return isIdentifier();
        }
        function nextTokenIsIdentifierOrKeyword() {
            nextToken();
            return ts.tokenIsIdentifierOrKeyword(token());
        }
        function nextTokenIsIdentifierOrKeywordOrGreaterThan() {
            nextToken();
            return ts.tokenIsIdentifierOrKeywordOrGreaterThan(token());
        }
        function isHeritageClauseExtendsOrImplementsKeyword() {
            if (token() === 108 /* ImplementsKeyword */ ||
                token() === 85 /* ExtendsKeyword */) {
                return lookAhead(nextTokenIsStartOfExpression);
            }
            return false;
        }
        function nextTokenIsStartOfExpression() {
            nextToken();
            return isStartOfExpression();
        }
        function nextTokenIsStartOfType() {
            nextToken();
            return isStartOfType();
        }
        // True if positioned at a list terminator
        function isListTerminator(kind) {
            if (token() === 1 /* EndOfFileToken */) {
                // Being at the end of the file ends all lists.
                return true;
            }
            switch (kind) {
                case 1 /* BlockStatements */:
                case 2 /* SwitchClauses */:
                case 4 /* TypeMembers */:
                case 5 /* ClassMembers */:
                case 6 /* EnumMembers */:
                case 12 /* ObjectLiteralMembers */:
                case 9 /* ObjectBindingElements */:
                case 22 /* ImportOrExportSpecifiers */:
                    return token() === 18 /* CloseBraceToken */;
                case 3 /* SwitchClauseStatements */:
                    return token() === 18 /* CloseBraceToken */ || token() === 73 /* CaseKeyword */ || token() === 79 /* DefaultKeyword */;
                case 7 /* HeritageClauseElement */:
                    return token() === 17 /* OpenBraceToken */ || token() === 85 /* ExtendsKeyword */ || token() === 108 /* ImplementsKeyword */;
                case 8 /* VariableDeclarations */:
                    return isVariableDeclaratorListTerminator();
                case 18 /* TypeParameters */:
                    // Tokens other than '>' are here for better error recovery
                    return token() === 29 /* GreaterThanToken */ || token() === 19 /* OpenParenToken */ || token() === 17 /* OpenBraceToken */ || token() === 85 /* ExtendsKeyword */ || token() === 108 /* ImplementsKeyword */;
                case 11 /* ArgumentExpressions */:
                    // Tokens other than ')' are here for better error recovery
                    return token() === 20 /* CloseParenToken */ || token() === 25 /* SemicolonToken */;
                case 15 /* ArrayLiteralMembers */:
                case 20 /* TupleElementTypes */:
                case 10 /* ArrayBindingElements */:
                    return token() === 22 /* CloseBracketToken */;
                case 16 /* Parameters */:
                case 17 /* RestProperties */:
                    // Tokens other than ')' and ']' (the latter for index signatures) are here for better error recovery
                    return token() === 20 /* CloseParenToken */ || token() === 22 /* CloseBracketToken */ /*|| token === SyntaxKind.OpenBraceToken*/;
                case 19 /* TypeArguments */:
                    // All other tokens should cause the type-argument to terminate except comma token
                    return token() !== 26 /* CommaToken */;
                case 21 /* HeritageClauses */:
                    return token() === 17 /* OpenBraceToken */ || token() === 18 /* CloseBraceToken */;
                case 13 /* JsxAttributes */:
                    return token() === 29 /* GreaterThanToken */ || token() === 41 /* SlashToken */;
                case 14 /* JsxChildren */:
                    return token() === 27 /* LessThanToken */ && lookAhead(nextTokenIsSlash);
                default:
                    return false;
            }
        }
        function isVariableDeclaratorListTerminator() {
            // If we can consume a semicolon (either explicitly, or with ASI), then consider us done
            // with parsing the list of variable declarators.
            if (canParseSemicolon()) {
                return true;
            }
            // in the case where we're parsing the variable declarator of a 'for-in' statement, we
            // are done if we see an 'in' keyword in front of us. Same with for-of
            if (isInOrOfKeyword(token())) {
                return true;
            }
            // ERROR RECOVERY TWEAK:
            // For better error recovery, if we see an '=>' then we just stop immediately.  We've got an
            // arrow function here and it's going to be very unlikely that we'll resynchronize and get
            // another variable declaration.
            if (token() === 36 /* EqualsGreaterThanToken */) {
                return true;
            }
            // Keep trying to parse out variable declarators.
            return false;
        }
        // True if positioned at element or terminator of the current list or any enclosing list
        function isInSomeParsingContext() {
            for (var kind = 0; kind < 23 /* Count */; kind++) {
                if (parsingContext & (1 << kind)) {
                    if (isListElement(kind, /*inErrorRecovery*/ true) || isListTerminator(kind)) {
                        return true;
                    }
                }
            }
            return false;
        }
        // Parses a list of elements
        function parseList(kind, parseElement) {
            var saveParsingContext = parsingContext;
            parsingContext |= 1 << kind;
            var list = [];
            var listPos = getNodePos();
            while (!isListTerminator(kind)) {
                if (isListElement(kind, /*inErrorRecovery*/ false)) {
                    var element = parseListElement(kind, parseElement);
                    list.push(element);
                    continue;
                }
                if (abortParsingListOrMoveToNextToken(kind)) {
                    break;
                }
            }
            parsingContext = saveParsingContext;
            return createNodeArray(list, listPos);
        }
        function parseListElement(parsingContext, parseElement) {
            var node = currentNode(parsingContext);
            if (node) {
                return consumeNode(node);
            }
            return parseElement();
        }
        function currentNode(parsingContext) {
            // If there is an outstanding parse error that we've encountered, but not attached to
            // some node, then we cannot get a node from the old source tree.  This is because we
            // want to mark the next node we encounter as being unusable.
            //
            // Note: This may be too conservative.  Perhaps we could reuse the node and set the bit
            // on it (or its leftmost child) as having the error.  For now though, being conservative
            // is nice and likely won't ever affect perf.
            if (parseErrorBeforeNextFinishedNode) {
                return undefined;
            }
            if (!syntaxCursor) {
                // if we don't have a cursor, we could never return a node from the old tree.
                return undefined;
            }
            var node = syntaxCursor.currentNode(scanner.getStartPos());
            // Can't reuse a missing node.
            if (ts.nodeIsMissing(node)) {
                return undefined;
            }
            // Can't reuse a node that intersected the change range.
            if (node.intersectsChange) {
                return undefined;
            }
            // Can't reuse a node that contains a parse error.  This is necessary so that we
            // produce the same set of errors again.
            if (ts.containsParseError(node)) {
                return undefined;
            }
            // We can only reuse a node if it was parsed under the same strict mode that we're
            // currently in.  i.e. if we originally parsed a node in non-strict mode, but then
            // the user added 'using strict' at the top of the file, then we can't use that node
            // again as the presence of strict mode may cause us to parse the tokens in the file
            // differently.
            //
            // Note: we *can* reuse tokens when the strict mode changes.  That's because tokens
            // are unaffected by strict mode.  It's just the parser will decide what to do with it
            // differently depending on what mode it is in.
            //
            // This also applies to all our other context flags as well.
            var nodeContextFlags = node.flags & 12679168 /* ContextFlags */;
            if (nodeContextFlags !== contextFlags) {
                return undefined;
            }
            // Ok, we have a node that looks like it could be reused.  Now verify that it is valid
            // in the current list parsing context that we're currently at.
            if (!canReuseNode(node, parsingContext)) {
                return undefined;
            }
            if (node.jsDocCache) {
                // jsDocCache may include tags from parent nodes, which might have been modified.
                node.jsDocCache = undefined;
            }
            return node;
        }
        function consumeNode(node) {
            // Move the scanner so it is after the node we just consumed.
            scanner.setTextPos(node.end);
            nextToken();
            return node;
        }
        function canReuseNode(node, parsingContext) {
            switch (parsingContext) {
                case 5 /* ClassMembers */:
                    return isReusableClassMember(node);
                case 2 /* SwitchClauses */:
                    return isReusableSwitchClause(node);
                case 0 /* SourceElements */:
                case 1 /* BlockStatements */:
                case 3 /* SwitchClauseStatements */:
                    return isReusableStatement(node);
                case 6 /* EnumMembers */:
                    return isReusableEnumMember(node);
                case 4 /* TypeMembers */:
                    return isReusableTypeMember(node);
                case 8 /* VariableDeclarations */:
                    return isReusableVariableDeclaration(node);
                case 16 /* Parameters */:
                    return isReusableParameter(node);
                case 17 /* RestProperties */:
                    return false;
                // Any other lists we do not care about reusing nodes in.  But feel free to add if
                // you can do so safely.  Danger areas involve nodes that may involve speculative
                // parsing.  If speculative parsing is involved with the node, then the range the
                // parser reached while looking ahead might be in the edited range (see the example
                // in canReuseVariableDeclaratorNode for a good case of this).
                case 21 /* HeritageClauses */:
                // This would probably be safe to reuse.  There is no speculative parsing with
                // heritage clauses.
                case 18 /* TypeParameters */:
                // This would probably be safe to reuse.  There is no speculative parsing with
                // type parameters.  Note that that's because type *parameters* only occur in
                // unambiguous *type* contexts.  While type *arguments* occur in very ambiguous
                // *expression* contexts.
                case 20 /* TupleElementTypes */:
                // This would probably be safe to reuse.  There is no speculative parsing with
                // tuple types.
                // Technically, type argument list types are probably safe to reuse.  While
                // speculative parsing is involved with them (since type argument lists are only
                // produced from speculative parsing a < as a type argument list), we only have
                // the types because speculative parsing succeeded.  Thus, the lookahead never
                // went past the end of the list and rewound.
                case 19 /* TypeArguments */:
                // Note: these are almost certainly not safe to ever reuse.  Expressions commonly
                // need a large amount of lookahead, and we should not reuse them as they may
                // have actually intersected the edit.
                case 11 /* ArgumentExpressions */:
                // This is not safe to reuse for the same reason as the 'AssignmentExpression'
                // cases.  i.e. a property assignment may end with an expression, and thus might
                // have lookahead far beyond it's old node.
                case 12 /* ObjectLiteralMembers */:
                // This is probably not safe to reuse.  There can be speculative parsing with
                // type names in a heritage clause.  There can be generic names in the type
                // name list, and there can be left hand side expressions (which can have type
                // arguments.)
                case 7 /* HeritageClauseElement */:
                // Perhaps safe to reuse, but it's unlikely we'd see more than a dozen attributes
                // on any given element. Same for children.
                case 13 /* JsxAttributes */:
                case 14 /* JsxChildren */:
            }
            return false;
        }
        function isReusableClassMember(node) {
            if (node) {
                switch (node.kind) {
                    case 155 /* Constructor */:
                    case 160 /* IndexSignature */:
                    case 156 /* GetAccessor */:
                    case 157 /* SetAccessor */:
                    case 152 /* PropertyDeclaration */:
                    case 212 /* SemicolonClassElement */:
                        return true;
                    case 154 /* MethodDeclaration */:
                        // Method declarations are not necessarily reusable.  An object-literal
                        // may have a method calls "constructor(...)" and we must reparse that
                        // into an actual .ConstructorDeclaration.
                        var methodDeclaration = node;
                        var nameIsConstructor = methodDeclaration.name.kind === 71 /* Identifier */ &&
                            methodDeclaration.name.originalKeywordKind === 123 /* ConstructorKeyword */;
                        return !nameIsConstructor;
                }
            }
            return false;
        }
        function isReusableSwitchClause(node) {
            if (node) {
                switch (node.kind) {
                    case 266 /* CaseClause */:
                    case 267 /* DefaultClause */:
                        return true;
                }
            }
            return false;
        }
        function isReusableStatement(node) {
            if (node) {
                switch (node.kind) {
                    case 234 /* FunctionDeclaration */:
                    case 214 /* VariableStatement */:
                    case 213 /* Block */:
                    case 217 /* IfStatement */:
                    case 216 /* ExpressionStatement */:
                    case 229 /* ThrowStatement */:
                    case 225 /* ReturnStatement */:
                    case 227 /* SwitchStatement */:
                    case 224 /* BreakStatement */:
                    case 223 /* ContinueStatement */:
                    case 221 /* ForInStatement */:
                    case 222 /* ForOfStatement */:
                    case 220 /* ForStatement */:
                    case 219 /* WhileStatement */:
                    case 226 /* WithStatement */:
                    case 215 /* EmptyStatement */:
                    case 230 /* TryStatement */:
                    case 228 /* LabeledStatement */:
                    case 218 /* DoStatement */:
                    case 231 /* DebuggerStatement */:
                    case 244 /* ImportDeclaration */:
                    case 243 /* ImportEqualsDeclaration */:
                    case 250 /* ExportDeclaration */:
                    case 249 /* ExportAssignment */:
                    case 239 /* ModuleDeclaration */:
                    case 235 /* ClassDeclaration */:
                    case 236 /* InterfaceDeclaration */:
                    case 238 /* EnumDeclaration */:
                    case 237 /* TypeAliasDeclaration */:
                        return true;
                }
            }
            return false;
        }
        function isReusableEnumMember(node) {
            return node.kind === 273 /* EnumMember */;
        }
        function isReusableTypeMember(node) {
            if (node) {
                switch (node.kind) {
                    case 159 /* ConstructSignature */:
                    case 153 /* MethodSignature */:
                    case 160 /* IndexSignature */:
                    case 151 /* PropertySignature */:
                    case 158 /* CallSignature */:
                        return true;
                }
            }
            return false;
        }
        function isReusableVariableDeclaration(node) {
            if (node.kind !== 232 /* VariableDeclaration */) {
                return false;
            }
            // Very subtle incremental parsing bug.  Consider the following code:
            //
            //      let v = new List < A, B
            //
            // This is actually legal code.  It's a list of variable declarators "v = new List<A"
            // on one side and "B" on the other. If you then change that to:
            //
            //      let v = new List < A, B >()
            //
            // then we have a problem.  "v = new List<A" doesn't intersect the change range, so we
            // start reparsing at "B" and we completely fail to handle this properly.
            //
            // In order to prevent this, we do not allow a variable declarator to be reused if it
            // has an initializer.
            var variableDeclarator = node;
            return variableDeclarator.initializer === undefined;
        }
        function isReusableParameter(node) {
            if (node.kind !== 149 /* Parameter */) {
                return false;
            }
            // See the comment in isReusableVariableDeclaration for why we do this.
            var parameter = node;
            return parameter.initializer === undefined;
        }
        // Returns true if we should abort parsing.
        function abortParsingListOrMoveToNextToken(kind) {
            parseErrorAtCurrentToken(parsingContextErrors(kind));
            if (isInSomeParsingContext()) {
                return true;
            }
            nextToken();
            return false;
        }
        function parsingContextErrors(context) {
            switch (context) {
                case 0 /* SourceElements */: return ts.Diagnostics.Declaration_or_statement_expected;
                case 1 /* BlockStatements */: return ts.Diagnostics.Declaration_or_statement_expected;
                case 2 /* SwitchClauses */: return ts.Diagnostics.case_or_default_expected;
                case 3 /* SwitchClauseStatements */: return ts.Diagnostics.Statement_expected;
                case 17 /* RestProperties */: // fallthrough
                case 4 /* TypeMembers */: return ts.Diagnostics.Property_or_signature_expected;
                case 5 /* ClassMembers */: return ts.Diagnostics.Unexpected_token_A_constructor_method_accessor_or_property_was_expected;
                case 6 /* EnumMembers */: return ts.Diagnostics.Enum_member_expected;
                case 7 /* HeritageClauseElement */: return ts.Diagnostics.Expression_expected;
                case 8 /* VariableDeclarations */: return ts.Diagnostics.Variable_declaration_expected;
                case 9 /* ObjectBindingElements */: return ts.Diagnostics.Property_destructuring_pattern_expected;
                case 10 /* ArrayBindingElements */: return ts.Diagnostics.Array_element_destructuring_pattern_expected;
                case 11 /* ArgumentExpressions */: return ts.Diagnostics.Argument_expression_expected;
                case 12 /* ObjectLiteralMembers */: return ts.Diagnostics.Property_assignment_expected;
                case 15 /* ArrayLiteralMembers */: return ts.Diagnostics.Expression_or_comma_expected;
                case 16 /* Parameters */: return ts.Diagnostics.Parameter_declaration_expected;
                case 18 /* TypeParameters */: return ts.Diagnostics.Type_parameter_declaration_expected;
                case 19 /* TypeArguments */: return ts.Diagnostics.Type_argument_expected;
                case 20 /* TupleElementTypes */: return ts.Diagnostics.Type_expected;
                case 21 /* HeritageClauses */: return ts.Diagnostics.Unexpected_token_expected;
                case 22 /* ImportOrExportSpecifiers */: return ts.Diagnostics.Identifier_expected;
                case 13 /* JsxAttributes */: return ts.Diagnostics.Identifier_expected;
                case 14 /* JsxChildren */: return ts.Diagnostics.Identifier_expected;
                default: return undefined; // TODO: GH#18217 `default: Debug.assertNever(context);`
            }
        }
        // Parses a comma-delimited list of elements
        function parseDelimitedList(kind, parseElement, considerSemicolonAsDelimiter) {
            var saveParsingContext = parsingContext;
            parsingContext |= 1 << kind;
            var list = [];
            var listPos = getNodePos();
            var commaStart = -1; // Meaning the previous token was not a comma
            while (true) {
                if (isListElement(kind, /*inErrorRecovery*/ false)) {
                    var startPos = scanner.getStartPos();
                    list.push(parseListElement(kind, parseElement));
                    commaStart = scanner.getTokenPos();
                    if (parseOptional(26 /* CommaToken */)) {
                        // No need to check for a zero length node since we know we parsed a comma
                        continue;
                    }
                    commaStart = -1; // Back to the state where the last token was not a comma
                    if (isListTerminator(kind)) {
                        break;
                    }
                    // We didn't get a comma, and the list wasn't terminated, explicitly parse
                    // out a comma so we give a good error message.
                    parseExpected(26 /* CommaToken */);
                    // If the token was a semicolon, and the caller allows that, then skip it and
                    // continue.  This ensures we get back on track and don't result in tons of
                    // parse errors.  For example, this can happen when people do things like use
                    // a semicolon to delimit object literal members.   Note: we'll have already
                    // reported an error when we called parseExpected above.
                    if (considerSemicolonAsDelimiter && token() === 25 /* SemicolonToken */ && !scanner.hasPrecedingLineBreak()) {
                        nextToken();
                    }
                    if (startPos === scanner.getStartPos()) {
                        // What we're parsing isn't actually remotely recognizable as a element and we've consumed no tokens whatsoever
                        // Consume a token to advance the parser in some way and avoid an infinite loop
                        // This can happen when we're speculatively parsing parenthesized expressions which we think may be arrow functions,
                        // or when a modifier keyword which is disallowed as a parameter name (ie, `static` in strict mode) is supplied
                        nextToken();
                    }
                    continue;
                }
                if (isListTerminator(kind)) {
                    break;
                }
                if (abortParsingListOrMoveToNextToken(kind)) {
                    break;
                }
            }
            parsingContext = saveParsingContext;
            var result = createNodeArray(list, listPos);
            // Recording the trailing comma is deliberately done after the previous
            // loop, and not just if we see a list terminator. This is because the list
            // may have ended incorrectly, but it is still important to know if there
            // was a trailing comma.
            // Check if the last token was a comma.
            if (commaStart >= 0) {
                // Always preserve a trailing comma by marking it on the NodeArray
                result.hasTrailingComma = true;
            }
            return result;
        }
        function createMissingList() {
            return createNodeArray([], getNodePos());
        }
        function parseBracketedList(kind, parseElement, open, close) {
            if (parseExpected(open)) {
                var result = parseDelimitedList(kind, parseElement);
                parseExpected(close);
                return result;
            }
            return createMissingList();
        }
        function parseEntityName(allowReservedWords, diagnosticMessage) {
            var entity = allowReservedWords ? parseIdentifierName(diagnosticMessage) : parseIdentifier(diagnosticMessage);
            var dotPos = scanner.getStartPos();
            while (parseOptional(23 /* DotToken */)) {
                if (token() === 27 /* LessThanToken */) {
                    // the entity is part of a JSDoc-style generic, so record the trailing dot for later error reporting
                    entity.jsdocDotPos = dotPos;
                    break;
                }
                dotPos = scanner.getStartPos();
                entity = createQualifiedName(entity, parseRightSideOfDot(allowReservedWords));
            }
            return entity;
        }
        function createQualifiedName(entity, name) {
            var node = createNode(146 /* QualifiedName */, entity.pos);
            node.left = entity;
            node.right = name;
            return finishNode(node);
        }
        function parseRightSideOfDot(allowIdentifierNames) {
            // Technically a keyword is valid here as all identifiers and keywords are identifier names.
            // However, often we'll encounter this in error situations when the identifier or keyword
            // is actually starting another valid construct.
            //
            // So, we check for the following specific case:
            //
            //      name.
            //      identifierOrKeyword identifierNameOrKeyword
            //
            // Note: the newlines are important here.  For example, if that above code
            // were rewritten into:
            //
            //      name.identifierOrKeyword
            //      identifierNameOrKeyword
            //
            // Then we would consider it valid.  That's because ASI would take effect and
            // the code would be implicitly: "name.identifierOrKeyword; identifierNameOrKeyword".
            // In the first case though, ASI will not take effect because there is not a
            // line terminator after the identifier or keyword.
            if (scanner.hasPrecedingLineBreak() && ts.tokenIsIdentifierOrKeyword(token())) {
                var matchesPattern = lookAhead(nextTokenIsIdentifierOrKeywordOnSameLine);
                if (matchesPattern) {
                    // Report that we need an identifier.  However, report it right after the dot,
                    // and not on the next token.  This is because the next token might actually
                    // be an identifier and the error would be quite confusing.
                    return createMissingNode(71 /* Identifier */, /*reportAtCurrentPosition*/ true, ts.Diagnostics.Identifier_expected);
                }
            }
            return allowIdentifierNames ? parseIdentifierName() : parseIdentifier();
        }
        function parseTemplateExpression() {
            var template = createNode(202 /* TemplateExpression */);
            template.head = parseTemplateHead();
            ts.Debug.assert(template.head.kind === 14 /* TemplateHead */, "Template head has wrong token kind");
            var list = [];
            var listPos = getNodePos();
            do {
                list.push(parseTemplateSpan());
            } while (ts.last(list).literal.kind === 15 /* TemplateMiddle */);
            template.templateSpans = createNodeArray(list, listPos);
            return finishNode(template);
        }
        function parseTemplateSpan() {
            var span = createNode(211 /* TemplateSpan */);
            span.expression = allowInAnd(parseExpression);
            var literal;
            if (token() === 18 /* CloseBraceToken */) {
                reScanTemplateToken();
                literal = parseTemplateMiddleOrTemplateTail();
            }
            else {
                literal = parseExpectedToken(16 /* TemplateTail */, ts.Diagnostics._0_expected, ts.tokenToString(18 /* CloseBraceToken */));
            }
            span.literal = literal;
            return finishNode(span);
        }
        function parseLiteralNode() {
            return parseLiteralLikeNode(token());
        }
        function parseTemplateHead() {
            var fragment = parseLiteralLikeNode(token());
            ts.Debug.assert(fragment.kind === 14 /* TemplateHead */, "Template head has wrong token kind");
            return fragment;
        }
        function parseTemplateMiddleOrTemplateTail() {
            var fragment = parseLiteralLikeNode(token());
            ts.Debug.assert(fragment.kind === 15 /* TemplateMiddle */ || fragment.kind === 16 /* TemplateTail */, "Template fragment has wrong token kind");
            return fragment;
        }
        function parseLiteralLikeNode(kind) {
            var node = createNode(kind);
            var text = scanner.getTokenValue();
            node.text = text;
            if (scanner.hasExtendedUnicodeEscape()) {
                node.hasExtendedUnicodeEscape = true;
            }
            if (scanner.isUnterminated()) {
                node.isUnterminated = true;
            }
            // Octal literals are not allowed in strict mode or ES5
            // Note that theoretically the following condition would hold true literals like 009,
            // which is not octal.But because of how the scanner separates the tokens, we would
            // never get a token like this. Instead, we would get 00 and 9 as two separate tokens.
            // We also do not need to check for negatives because any prefix operator would be part of a
            // parent unary expression.
            if (node.kind === 8 /* NumericLiteral */) {
                node.numericLiteralFlags = scanner.getTokenFlags() & 1008 /* NumericLiteralFlags */;
            }
            nextToken();
            finishNode(node);
            return node;
        }
        // TYPES
        function parseTypeReference() {
            var node = createNode(162 /* TypeReference */);
            node.typeName = parseEntityName(/*allowReservedWords*/ true, ts.Diagnostics.Type_expected);
            if (!scanner.hasPrecedingLineBreak() && token() === 27 /* LessThanToken */) {
                node.typeArguments = parseBracketedList(19 /* TypeArguments */, parseType, 27 /* LessThanToken */, 29 /* GreaterThanToken */);
            }
            return finishNode(node);
        }
        // If true, we should abort parsing an error function.
        function typeHasArrowFunctionBlockingParseError(node) {
            switch (node.kind) {
                case 162 /* TypeReference */:
                    return ts.nodeIsMissing(node.typeName);
                case 163 /* FunctionType */:
                case 164 /* ConstructorType */: {
                    var _a = node, parameters = _a.parameters, type = _a.type;
                    // parameters.pos === parameters.end only if we used parseMissingList, else should contain at least `()`
                    return parameters.pos === parameters.end || typeHasArrowFunctionBlockingParseError(type);
                }
                case 173 /* ParenthesizedType */:
                    return typeHasArrowFunctionBlockingParseError(node.type);
                default:
                    return false;
            }
        }
        function parseThisTypePredicate(lhs) {
            nextToken();
            var node = createNode(161 /* TypePredicate */, lhs.pos);
            node.parameterName = lhs;
            node.type = parseType();
            return finishNode(node);
        }
        function parseThisTypeNode() {
            var node = createNode(174 /* ThisType */);
            nextToken();
            return finishNode(node);
        }
        function parseJSDocAllType(postFixEquals) {
            var result = createNode(279 /* JSDocAllType */);
            if (postFixEquals) {
                return createJSDocPostfixType(283 /* JSDocOptionalType */, result);
            }
            else {
                nextToken();
            }
            return finishNode(result);
        }
        function parseJSDocNonNullableType() {
            var result = createNode(282 /* JSDocNonNullableType */);
            nextToken();
            result.type = parseNonArrayType();
            return finishNode(result);
        }
        function parseJSDocUnknownOrNullableType() {
            var pos = scanner.getStartPos();
            // skip the ?
            nextToken();
            // Need to lookahead to decide if this is a nullable or unknown type.
            // Here are cases where we'll pick the unknown type:
            //
            //      Foo(?,
            //      { a: ? }
            //      Foo(?)
            //      Foo<?>
            //      Foo(?=
            //      (?|
            if (token() === 26 /* CommaToken */ ||
                token() === 18 /* CloseBraceToken */ ||
                token() === 20 /* CloseParenToken */ ||
                token() === 29 /* GreaterThanToken */ ||
                token() === 58 /* EqualsToken */ ||
                token() === 49 /* BarToken */) {
                var result = createNode(280 /* JSDocUnknownType */, pos);
                return finishNode(result);
            }
            else {
                var result = createNode(281 /* JSDocNullableType */, pos);
                result.type = parseType();
                return finishNode(result);
            }
        }
        function parseJSDocFunctionType() {
            if (lookAhead(nextTokenIsOpenParen)) {
                var result = createNodeWithJSDoc(284 /* JSDocFunctionType */);
                nextToken();
                fillSignature(56 /* ColonToken */, 4 /* Type */ | 32 /* JSDoc */, result);
                return finishNode(result);
            }
            var node = createNode(162 /* TypeReference */);
            node.typeName = parseIdentifierName();
            return finishNode(node);
        }
        function parseJSDocParameter() {
            var parameter = createNode(149 /* Parameter */);
            if (token() === 99 /* ThisKeyword */ || token() === 94 /* NewKeyword */) {
                parameter.name = parseIdentifierName();
                parseExpected(56 /* ColonToken */);
            }
            parameter.type = parseJSDocType();
            return finishNode(parameter);
        }
        function parseJSDocType() {
            var dotdotdot = parseOptionalToken(24 /* DotDotDotToken */);
            var type = parseType();
            if (dotdotdot) {
                var variadic = createNode(285 /* JSDocVariadicType */, dotdotdot.pos);
                variadic.type = type;
                type = finishNode(variadic);
            }
            if (token() === 58 /* EqualsToken */) {
                return createJSDocPostfixType(283 /* JSDocOptionalType */, type);
            }
            return type;
        }
        function parseTypeQuery() {
            var node = createNode(165 /* TypeQuery */);
            parseExpected(103 /* TypeOfKeyword */);
            node.exprName = parseEntityName(/*allowReservedWords*/ true);
            return finishNode(node);
        }
        function parseTypeParameter() {
            var node = createNode(148 /* TypeParameter */);
            node.name = parseIdentifier();
            if (parseOptional(85 /* ExtendsKeyword */)) {
                // It's not uncommon for people to write improper constraints to a generic.  If the
                // user writes a constraint that is an expression and not an actual type, then parse
                // it out as an expression (so we can recover well), but report that a type is needed
                // instead.
                if (isStartOfType() || !isStartOfExpression()) {
                    node.constraint = parseType();
                }
                else {
                    // It was not a type, and it looked like an expression.  Parse out an expression
                    // here so we recover well.  Note: it is important that we call parseUnaryExpression
                    // and not parseExpression here.  If the user has:
                    //
                    //      <T extends "">
                    //
                    // We do *not* want to consume the `>` as we're consuming the expression for "".
                    node.expression = parseUnaryExpressionOrHigher();
                }
            }
            if (parseOptional(58 /* EqualsToken */)) {
                node.default = parseType();
            }
            return finishNode(node);
        }
        function parseTypeParameters() {
            if (token() === 27 /* LessThanToken */) {
                return parseBracketedList(18 /* TypeParameters */, parseTypeParameter, 27 /* LessThanToken */, 29 /* GreaterThanToken */);
            }
        }
        function parseParameterType() {
            if (parseOptional(56 /* ColonToken */)) {
                return parseType();
            }
            return undefined;
        }
        function isStartOfParameter() {
            return token() === 24 /* DotDotDotToken */ ||
                isIdentifierOrPattern() ||
                ts.isModifierKind(token()) ||
                token() === 57 /* AtToken */ ||
                isStartOfType(/*inStartOfParameter*/ true);
        }
        function parseParameter() {
            var node = createNodeWithJSDoc(149 /* Parameter */);
            if (token() === 99 /* ThisKeyword */) {
                node.name = createIdentifier(/*isIdentifier*/ true);
                node.type = parseParameterType();
                return finishNode(node);
            }
            node.decorators = parseDecorators();
            node.modifiers = parseModifiers();
            node.dotDotDotToken = parseOptionalToken(24 /* DotDotDotToken */);
            // FormalParameter [Yield,Await]:
            //      BindingElement[?Yield,?Await]
            node.name = parseIdentifierOrPattern();
            if (ts.getFullWidth(node.name) === 0 && !ts.hasModifiers(node) && ts.isModifierKind(token())) {
                // in cases like
                // 'use strict'
                // function foo(static)
                // isParameter('static') === true, because of isModifier('static')
                // however 'static' is not a legal identifier in a strict mode.
                // so result of this function will be ParameterDeclaration (flags = 0, name = missing, type = undefined, initializer = undefined)
                // and current token will not change => parsing of the enclosing parameter list will last till the end of time (or OOM)
                // to avoid this we'll advance cursor to the next token.
                nextToken();
            }
            node.questionToken = parseOptionalToken(55 /* QuestionToken */);
            node.type = parseParameterType();
            node.initializer = parseInitializer();
            return finishNode(node);
        }
        /**
         * Note: If returnToken is EqualsGreaterThanToken, `signature.type` will always be defined.
         * @returns If return type parsing succeeds
         */
        function fillSignature(returnToken, flags, signature) {
            if (!(flags & 32 /* JSDoc */)) {
                signature.typeParameters = parseTypeParameters();
            }
            var parametersParsedSuccessfully = parseParameterList(signature, flags);
            if (shouldParseReturnType(returnToken, !!(flags & 4 /* Type */))) {
                signature.type = parseTypeOrTypePredicate();
                if (typeHasArrowFunctionBlockingParseError(signature.type))
                    return false;
            }
            return parametersParsedSuccessfully;
        }
        function shouldParseReturnType(returnToken, isType) {
            if (returnToken === 36 /* EqualsGreaterThanToken */) {
                parseExpected(returnToken);
                return true;
            }
            else if (parseOptional(56 /* ColonToken */)) {
                return true;
            }
            else if (isType && token() === 36 /* EqualsGreaterThanToken */) {
                // This is easy to get backward, especially in type contexts, so parse the type anyway
                parseErrorAtCurrentToken(ts.Diagnostics._0_expected, ts.tokenToString(56 /* ColonToken */));
                nextToken();
                return true;
            }
            return false;
        }
        // Returns true on success.
        function parseParameterList(signature, flags) {
            // FormalParameters [Yield,Await]: (modified)
            //      [empty]
            //      FormalParameterList[?Yield,Await]
            //
            // FormalParameter[Yield,Await]: (modified)
            //      BindingElement[?Yield,Await]
            //
            // BindingElement [Yield,Await]: (modified)
            //      SingleNameBinding[?Yield,?Await]
            //      BindingPattern[?Yield,?Await]Initializer [In, ?Yield,?Await] opt
            //
            // SingleNameBinding [Yield,Await]:
            //      BindingIdentifier[?Yield,?Await]Initializer [In, ?Yield,?Await] opt
            if (!parseExpected(19 /* OpenParenToken */)) {
                signature.parameters = createMissingList();
                return false;
            }
            var savedYieldContext = inYieldContext();
            var savedAwaitContext = inAwaitContext();
            setYieldContext(!!(flags & 1 /* Yield */));
            setAwaitContext(!!(flags & 2 /* Await */));
            signature.parameters = parseDelimitedList(16 /* Parameters */, flags & 32 /* JSDoc */ ? parseJSDocParameter : parseParameter);
            setYieldContext(savedYieldContext);
            setAwaitContext(savedAwaitContext);
            return parseExpected(20 /* CloseParenToken */);
        }
        function parseTypeMemberSemicolon() {
            // We allow type members to be separated by commas or (possibly ASI) semicolons.
            // First check if it was a comma.  If so, we're done with the member.
            if (parseOptional(26 /* CommaToken */)) {
                return;
            }
            // Didn't have a comma.  We must have a (possible ASI) semicolon.
            parseSemicolon();
        }
        function parseSignatureMember(kind) {
            var node = createNodeWithJSDoc(kind);
            if (kind === 159 /* ConstructSignature */) {
                parseExpected(94 /* NewKeyword */);
            }
            fillSignature(56 /* ColonToken */, 4 /* Type */, node);
            parseTypeMemberSemicolon();
            return finishNode(node);
        }
        function isIndexSignature() {
            return token() === 21 /* OpenBracketToken */ && lookAhead(isUnambiguouslyIndexSignature);
        }
        function isUnambiguouslyIndexSignature() {
            // The only allowed sequence is:
            //
            //   [id:
            //
            // However, for error recovery, we also check the following cases:
            //
            //   [...
            //   [id,
            //   [id?,
            //   [id?:
            //   [id?]
            //   [public id
            //   [private id
            //   [protected id
            //   []
            //
            nextToken();
            if (token() === 24 /* DotDotDotToken */ || token() === 22 /* CloseBracketToken */) {
                return true;
            }
            if (ts.isModifierKind(token())) {
                nextToken();
                if (isIdentifier()) {
                    return true;
                }
            }
            else if (!isIdentifier()) {
                return false;
            }
            else {
                // Skip the identifier
                nextToken();
            }
            // A colon signifies a well formed indexer
            // A comma should be a badly formed indexer because comma expressions are not allowed
            // in computed properties.
            if (token() === 56 /* ColonToken */ || token() === 26 /* CommaToken */) {
                return true;
            }
            // Question mark could be an indexer with an optional property,
            // or it could be a conditional expression in a computed property.
            if (token() !== 55 /* QuestionToken */) {
                return false;
            }
            // If any of the following tokens are after the question mark, it cannot
            // be a conditional expression, so treat it as an indexer.
            nextToken();
            return token() === 56 /* ColonToken */ || token() === 26 /* CommaToken */ || token() === 22 /* CloseBracketToken */;
        }
        function parseIndexSignatureDeclaration(node) {
            node.kind = 160 /* IndexSignature */;
            node.parameters = parseBracketedList(16 /* Parameters */, parseParameter, 21 /* OpenBracketToken */, 22 /* CloseBracketToken */);
            node.type = parseTypeAnnotation();
            parseTypeMemberSemicolon();
            return finishNode(node);
        }
        function parsePropertyOrMethodSignature(node) {
            node.name = parsePropertyName();
            node.questionToken = parseOptionalToken(55 /* QuestionToken */);
            if (token() === 19 /* OpenParenToken */ || token() === 27 /* LessThanToken */) {
                node.kind = 153 /* MethodSignature */;
                // Method signatures don't exist in expression contexts.  So they have neither
                // [Yield] nor [Await]
                fillSignature(56 /* ColonToken */, 4 /* Type */, node);
            }
            else {
                node.kind = 151 /* PropertySignature */;
                node.type = parseTypeAnnotation();
                if (token() === 58 /* EqualsToken */) {
                    // Although type literal properties cannot not have initializers, we attempt
                    // to parse an initializer so we can report in the checker that an interface
                    // property or type literal property cannot have an initializer.
                    node.initializer = parseInitializer();
                }
            }
            parseTypeMemberSemicolon();
            return finishNode(node);
        }
        function isTypeMemberStart() {
            // Return true if we have the start of a signature member
            if (token() === 19 /* OpenParenToken */ || token() === 27 /* LessThanToken */) {
                return true;
            }
            var idToken = false;
            // Eat up all modifiers, but hold on to the last one in case it is actually an identifier
            while (ts.isModifierKind(token())) {
                idToken = true;
                nextToken();
            }
            // Index signatures and computed property names are type members
            if (token() === 21 /* OpenBracketToken */) {
                return true;
            }
            // Try to get the first property-like token following all modifiers
            if (isLiteralPropertyName()) {
                idToken = true;
                nextToken();
            }
            // If we were able to get any potential identifier, check that it is
            // the start of a member declaration
            if (idToken) {
                return token() === 19 /* OpenParenToken */ ||
                    token() === 27 /* LessThanToken */ ||
                    token() === 55 /* QuestionToken */ ||
                    token() === 56 /* ColonToken */ ||
                    token() === 26 /* CommaToken */ ||
                    canParseSemicolon();
            }
            return false;
        }
        function parseTypeMember() {
            if (token() === 19 /* OpenParenToken */ || token() === 27 /* LessThanToken */) {
                return parseSignatureMember(158 /* CallSignature */);
            }
            if (token() === 94 /* NewKeyword */ && lookAhead(nextTokenIsOpenParenOrLessThan)) {
                return parseSignatureMember(159 /* ConstructSignature */);
            }
            var node = createNodeWithJSDoc(0 /* Unknown */);
            node.modifiers = parseModifiers();
            if (isIndexSignature()) {
                return parseIndexSignatureDeclaration(node);
            }
            return parsePropertyOrMethodSignature(node);
        }
        function nextTokenIsOpenParenOrLessThan() {
            nextToken();
            return token() === 19 /* OpenParenToken */ || token() === 27 /* LessThanToken */;
        }
        function nextTokenIsDot() {
            return nextToken() === 23 /* DotToken */;
        }
        function nextTokenIsOpenParenOrLessThanOrDot() {
            switch (nextToken()) {
                case 19 /* OpenParenToken */:
                case 27 /* LessThanToken */:
                case 23 /* DotToken */:
                    return true;
            }
            return false;
        }
        function parseTypeLiteral() {
            var node = createNode(166 /* TypeLiteral */);
            node.members = parseObjectTypeMembers();
            return finishNode(node);
        }
        function parseObjectTypeMembers() {
            var members;
            if (parseExpected(17 /* OpenBraceToken */)) {
                members = parseList(4 /* TypeMembers */, parseTypeMember);
                parseExpected(18 /* CloseBraceToken */);
            }
            else {
                members = createMissingList();
            }
            return members;
        }
        function isStartOfMappedType() {
            nextToken();
            if (token() === 37 /* PlusToken */ || token() === 38 /* MinusToken */) {
                return nextToken() === 132 /* ReadonlyKeyword */;
            }
            if (token() === 132 /* ReadonlyKeyword */) {
                nextToken();
            }
            return token() === 21 /* OpenBracketToken */ && nextTokenIsIdentifier() && nextToken() === 92 /* InKeyword */;
        }
        function parseMappedTypeParameter() {
            var node = createNode(148 /* TypeParameter */);
            node.name = parseIdentifier();
            parseExpected(92 /* InKeyword */);
            node.constraint = parseType();
            return finishNode(node);
        }
        function parseMappedType() {
            var node = createNode(177 /* MappedType */);
            parseExpected(17 /* OpenBraceToken */);
            if (token() === 132 /* ReadonlyKeyword */ || token() === 37 /* PlusToken */ || token() === 38 /* MinusToken */) {
                node.readonlyToken = parseTokenNode();
                if (node.readonlyToken.kind !== 132 /* ReadonlyKeyword */) {
                    parseExpectedToken(132 /* ReadonlyKeyword */);
                }
            }
            parseExpected(21 /* OpenBracketToken */);
            node.typeParameter = parseMappedTypeParameter();
            parseExpected(22 /* CloseBracketToken */);
            if (token() === 55 /* QuestionToken */ || token() === 37 /* PlusToken */ || token() === 38 /* MinusToken */) {
                node.questionToken = parseTokenNode();
                if (node.questionToken.kind !== 55 /* QuestionToken */) {
                    parseExpectedToken(55 /* QuestionToken */);
                }
            }
            node.type = parseTypeAnnotation();
            parseSemicolon();
            parseExpected(18 /* CloseBraceToken */);
            return finishNode(node);
        }
        function parseTupleType() {
            var node = createNode(168 /* TupleType */);
            node.elementTypes = parseBracketedList(20 /* TupleElementTypes */, parseType, 21 /* OpenBracketToken */, 22 /* CloseBracketToken */);
            return finishNode(node);
        }
        function parseParenthesizedType() {
            var node = createNode(173 /* ParenthesizedType */);
            parseExpected(19 /* OpenParenToken */);
            node.type = parseType();
            parseExpected(20 /* CloseParenToken */);
            return finishNode(node);
        }
        function parseFunctionOrConstructorType() {
            var pos = getNodePos();
            var kind = parseOptional(94 /* NewKeyword */) ? 164 /* ConstructorType */ : 163 /* FunctionType */;
            var node = createNodeWithJSDoc(kind, pos);
            fillSignature(36 /* EqualsGreaterThanToken */, 4 /* Type */, node);
            return finishNode(node);
        }
        function parseKeywordAndNoDot() {
            var node = parseTokenNode();
            return token() === 23 /* DotToken */ ? undefined : node;
        }
        function parseLiteralTypeNode(negative) {
            var node = createNode(178 /* LiteralType */);
            var unaryMinusExpression;
            if (negative) {
                unaryMinusExpression = createNode(198 /* PrefixUnaryExpression */);
                unaryMinusExpression.operator = 38 /* MinusToken */;
                nextToken();
            }
            var expression = token() === 101 /* TrueKeyword */ || token() === 86 /* FalseKeyword */
                ? parseTokenNode()
                : parseLiteralLikeNode(token());
            if (negative) {
                unaryMinusExpression.operand = expression;
                finishNode(unaryMinusExpression);
                expression = unaryMinusExpression;
            }
            node.literal = expression;
            return finishNode(node);
        }
        function isStartOfTypeOfImportType() {
            nextToken();
            return token() === 91 /* ImportKeyword */;
        }
        function parseImportType() {
            sourceFile.flags |= 524288 /* PossiblyContainsDynamicImport */;
            var node = createNode(179 /* ImportType */);
            if (parseOptional(103 /* TypeOfKeyword */)) {
                node.isTypeOf = true;
            }
            parseExpected(91 /* ImportKeyword */);
            parseExpected(19 /* OpenParenToken */);
            node.argument = parseType();
            parseExpected(20 /* CloseParenToken */);
            if (parseOptional(23 /* DotToken */)) {
                node.qualifier = parseEntityName(/*allowReservedWords*/ true, ts.Diagnostics.Type_expected);
            }
            node.typeArguments = tryParseTypeArguments();
            return finishNode(node);
        }
        function nextTokenIsNumericLiteral() {
            return nextToken() === 8 /* NumericLiteral */;
        }
        function parseNonArrayType() {
            switch (token()) {
                case 119 /* AnyKeyword */:
                case 142 /* UnknownKeyword */:
                case 137 /* StringKeyword */:
                case 134 /* NumberKeyword */:
                case 138 /* SymbolKeyword */:
                case 122 /* BooleanKeyword */:
                case 140 /* UndefinedKeyword */:
                case 131 /* NeverKeyword */:
                case 135 /* ObjectKeyword */:
                    // If these are followed by a dot, then parse these out as a dotted type reference instead.
                    return tryParse(parseKeywordAndNoDot) || parseTypeReference();
                case 39 /* AsteriskToken */:
                    return parseJSDocAllType(/*postfixEquals*/ false);
                case 61 /* AsteriskEqualsToken */:
                    return parseJSDocAllType(/*postfixEquals*/ true);
                case 55 /* QuestionToken */:
                    return parseJSDocUnknownOrNullableType();
                case 89 /* FunctionKeyword */:
                    return parseJSDocFunctionType();
                case 51 /* ExclamationToken */:
                    return parseJSDocNonNullableType();
                case 13 /* NoSubstitutionTemplateLiteral */:
                case 9 /* StringLiteral */:
                case 8 /* NumericLiteral */:
                case 101 /* TrueKeyword */:
                case 86 /* FalseKeyword */:
                    return parseLiteralTypeNode();
                case 38 /* MinusToken */:
                    return lookAhead(nextTokenIsNumericLiteral) ? parseLiteralTypeNode(/*negative*/ true) : parseTypeReference();
                case 105 /* VoidKeyword */:
                case 95 /* NullKeyword */:
                    return parseTokenNode();
                case 99 /* ThisKeyword */: {
                    var thisKeyword = parseThisTypeNode();
                    if (token() === 127 /* IsKeyword */ && !scanner.hasPrecedingLineBreak()) {
                        return parseThisTypePredicate(thisKeyword);
                    }
                    else {
                        return thisKeyword;
                    }
                }
                case 103 /* TypeOfKeyword */:
                    return lookAhead(isStartOfTypeOfImportType) ? parseImportType() : parseTypeQuery();
                case 17 /* OpenBraceToken */:
                    return lookAhead(isStartOfMappedType) ? parseMappedType() : parseTypeLiteral();
                case 21 /* OpenBracketToken */:
                    return parseTupleType();
                case 19 /* OpenParenToken */:
                    return parseParenthesizedType();
                case 91 /* ImportKeyword */:
                    return parseImportType();
                default:
                    return parseTypeReference();
            }
        }
        function isStartOfType(inStartOfParameter) {
            switch (token()) {
                case 119 /* AnyKeyword */:
                case 142 /* UnknownKeyword */:
                case 137 /* StringKeyword */:
                case 134 /* NumberKeyword */:
                case 122 /* BooleanKeyword */:
                case 138 /* SymbolKeyword */:
                case 141 /* UniqueKeyword */:
                case 105 /* VoidKeyword */:
                case 140 /* UndefinedKeyword */:
                case 95 /* NullKeyword */:
                case 99 /* ThisKeyword */:
                case 103 /* TypeOfKeyword */:
                case 131 /* NeverKeyword */:
                case 17 /* OpenBraceToken */:
                case 21 /* OpenBracketToken */:
                case 27 /* LessThanToken */:
                case 49 /* BarToken */:
                case 48 /* AmpersandToken */:
                case 94 /* NewKeyword */:
                case 9 /* StringLiteral */:
                case 8 /* NumericLiteral */:
                case 101 /* TrueKeyword */:
                case 86 /* FalseKeyword */:
                case 135 /* ObjectKeyword */:
                case 39 /* AsteriskToken */:
                case 55 /* QuestionToken */:
                case 51 /* ExclamationToken */:
                case 24 /* DotDotDotToken */:
                case 126 /* InferKeyword */:
                case 91 /* ImportKeyword */:
                    return true;
                case 38 /* MinusToken */:
                    return !inStartOfParameter && lookAhead(nextTokenIsNumericLiteral);
                case 19 /* OpenParenToken */:
                    // Only consider '(' the start of a type if followed by ')', '...', an identifier, a modifier,
                    // or something that starts a type. We don't want to consider things like '(1)' a type.
                    return !inStartOfParameter && lookAhead(isStartOfParenthesizedOrFunctionType);
                default:
                    return isIdentifier();
            }
        }
        function isStartOfParenthesizedOrFunctionType() {
            nextToken();
            return token() === 20 /* CloseParenToken */ || isStartOfParameter() || isStartOfType();
        }
        function parsePostfixTypeOrHigher() {
            var type = parseNonArrayType();
            while (!scanner.hasPrecedingLineBreak()) {
                switch (token()) {
                    case 51 /* ExclamationToken */:
                        type = createJSDocPostfixType(282 /* JSDocNonNullableType */, type);
                        break;
                    case 55 /* QuestionToken */:
                        // If not in JSDoc and next token is start of a type we have a conditional type
                        if (!(contextFlags & 2097152 /* JSDoc */) && lookAhead(nextTokenIsStartOfType)) {
                            return type;
                        }
                        type = createJSDocPostfixType(281 /* JSDocNullableType */, type);
                        break;
                    case 21 /* OpenBracketToken */:
                        parseExpected(21 /* OpenBracketToken */);
                        if (isStartOfType()) {
                            var node = createNode(176 /* IndexedAccessType */, type.pos);
                            node.objectType = type;
                            node.indexType = parseType();
                            parseExpected(22 /* CloseBracketToken */);
                            type = finishNode(node);
                        }
                        else {
                            var node = createNode(167 /* ArrayType */, type.pos);
                            node.elementType = type;
                            parseExpected(22 /* CloseBracketToken */);
                            type = finishNode(node);
                        }
                        break;
                    default:
                        return type;
                }
            }
            return type;
        }
        function createJSDocPostfixType(kind, type) {
            nextToken();
            var postfix = createNode(kind, type.pos);
            postfix.type = type;
            return finishNode(postfix);
        }
        function parseTypeOperator(operator) {
            var node = createNode(175 /* TypeOperator */);
            parseExpected(operator);
            node.operator = operator;
            node.type = parseTypeOperatorOrHigher();
            return finishNode(node);
        }
        function parseInferType() {
            var node = createNode(172 /* InferType */);
            parseExpected(126 /* InferKeyword */);
            var typeParameter = createNode(148 /* TypeParameter */);
            typeParameter.name = parseIdentifier();
            node.typeParameter = finishNode(typeParameter);
            return finishNode(node);
        }
        function parseTypeOperatorOrHigher() {
            var operator = token();
            switch (operator) {
                case 128 /* KeyOfKeyword */:
                case 141 /* UniqueKeyword */:
                    return parseTypeOperator(operator);
                case 126 /* InferKeyword */:
                    return parseInferType();
            }
            return parsePostfixTypeOrHigher();
        }
        function parseUnionOrIntersectionType(kind, parseConstituentType, operator) {
            parseOptional(operator);
            var type = parseConstituentType();
            if (token() === operator) {
                var types = [type];
                while (parseOptional(operator)) {
                    types.push(parseConstituentType());
                }
                var node = createNode(kind, type.pos);
                node.types = createNodeArray(types, type.pos);
                type = finishNode(node);
            }
            return type;
        }
        function parseIntersectionTypeOrHigher() {
            return parseUnionOrIntersectionType(170 /* IntersectionType */, parseTypeOperatorOrHigher, 48 /* AmpersandToken */);
        }
        function parseUnionTypeOrHigher() {
            return parseUnionOrIntersectionType(169 /* UnionType */, parseIntersectionTypeOrHigher, 49 /* BarToken */);
        }
        function isStartOfFunctionType() {
            if (token() === 27 /* LessThanToken */) {
                return true;
            }
            return token() === 19 /* OpenParenToken */ && lookAhead(isUnambiguouslyStartOfFunctionType);
        }
        function skipParameterStart() {
            if (ts.isModifierKind(token())) {
                // Skip modifiers
                parseModifiers();
            }
            if (isIdentifier() || token() === 99 /* ThisKeyword */) {
                nextToken();
                return true;
            }
            if (token() === 21 /* OpenBracketToken */ || token() === 17 /* OpenBraceToken */) {
                // Return true if we can parse an array or object binding pattern with no errors
                var previousErrorCount = parseDiagnostics.length;
                parseIdentifierOrPattern();
                return previousErrorCount === parseDiagnostics.length;
            }
            return false;
        }
        function isUnambiguouslyStartOfFunctionType() {
            nextToken();
            if (token() === 20 /* CloseParenToken */ || token() === 24 /* DotDotDotToken */) {
                // ( )
                // ( ...
                return true;
            }
            if (skipParameterStart()) {
                // We successfully skipped modifiers (if any) and an identifier or binding pattern,
                // now see if we have something that indicates a parameter declaration
                if (token() === 56 /* ColonToken */ || token() === 26 /* CommaToken */ ||
                    token() === 55 /* QuestionToken */ || token() === 58 /* EqualsToken */) {
                    // ( xxx :
                    // ( xxx ,
                    // ( xxx ?
                    // ( xxx =
                    return true;
                }
                if (token() === 20 /* CloseParenToken */) {
                    nextToken();
                    if (token() === 36 /* EqualsGreaterThanToken */) {
                        // ( xxx ) =>
                        return true;
                    }
                }
            }
            return false;
        }
        function parseTypeOrTypePredicate() {
            var typePredicateVariable = isIdentifier() && tryParse(parseTypePredicatePrefix);
            var type = parseType();
            if (typePredicateVariable) {
                var node = createNode(161 /* TypePredicate */, typePredicateVariable.pos);
                node.parameterName = typePredicateVariable;
                node.type = type;
                return finishNode(node);
            }
            else {
                return type;
            }
        }
        function parseTypePredicatePrefix() {
            var id = parseIdentifier();
            if (token() === 127 /* IsKeyword */ && !scanner.hasPrecedingLineBreak()) {
                nextToken();
                return id;
            }
        }
        function parseType() {
            // The rules about 'yield' only apply to actual code/expression contexts.  They don't
            // apply to 'type' contexts.  So we disable these parameters here before moving on.
            return doOutsideOfContext(20480 /* TypeExcludesFlags */, parseTypeWorker);
        }
        function parseTypeWorker(noConditionalTypes) {
            if (isStartOfFunctionType() || token() === 94 /* NewKeyword */) {
                return parseFunctionOrConstructorType();
            }
            var type = parseUnionTypeOrHigher();
            if (!noConditionalTypes && !scanner.hasPrecedingLineBreak() && parseOptional(85 /* ExtendsKeyword */)) {
                var node = createNode(171 /* ConditionalType */, type.pos);
                node.checkType = type;
                // The type following 'extends' is not permitted to be another conditional type
                node.extendsType = parseTypeWorker(/*noConditionalTypes*/ true);
                parseExpected(55 /* QuestionToken */);
                node.trueType = parseTypeWorker();
                parseExpected(56 /* ColonToken */);
                node.falseType = parseTypeWorker();
                return finishNode(node);
            }
            return type;
        }
        function parseTypeAnnotation() {
            return parseOptional(56 /* ColonToken */) ? parseType() : undefined;
        }
        // EXPRESSIONS
        function isStartOfLeftHandSideExpression() {
            switch (token()) {
                case 99 /* ThisKeyword */:
                case 97 /* SuperKeyword */:
                case 95 /* NullKeyword */:
                case 101 /* TrueKeyword */:
                case 86 /* FalseKeyword */:
                case 8 /* NumericLiteral */:
                case 9 /* StringLiteral */:
                case 13 /* NoSubstitutionTemplateLiteral */:
                case 14 /* TemplateHead */:
                case 19 /* OpenParenToken */:
                case 21 /* OpenBracketToken */:
                case 17 /* OpenBraceToken */:
                case 89 /* FunctionKeyword */:
                case 75 /* ClassKeyword */:
                case 94 /* NewKeyword */:
                case 41 /* SlashToken */:
                case 63 /* SlashEqualsToken */:
                case 71 /* Identifier */:
                    return true;
                case 91 /* ImportKeyword */:
                    return lookAhead(nextTokenIsOpenParenOrLessThanOrDot);
                default:
                    return isIdentifier();
            }
        }
        function isStartOfExpression() {
            if (isStartOfLeftHandSideExpression()) {
                return true;
            }
            switch (token()) {
                case 37 /* PlusToken */:
                case 38 /* MinusToken */:
                case 52 /* TildeToken */:
                case 51 /* ExclamationToken */:
                case 80 /* DeleteKeyword */:
                case 103 /* TypeOfKeyword */:
                case 105 /* VoidKeyword */:
                case 43 /* PlusPlusToken */:
                case 44 /* MinusMinusToken */:
                case 27 /* LessThanToken */:
                case 121 /* AwaitKeyword */:
                case 116 /* YieldKeyword */:
                    // Yield/await always starts an expression.  Either it is an identifier (in which case
                    // it is definitely an expression).  Or it's a keyword (either because we're in
                    // a generator or async function, or in strict mode (or both)) and it started a yield or await expression.
                    return true;
                default:
                    // Error tolerance.  If we see the start of some binary operator, we consider
                    // that the start of an expression.  That way we'll parse out a missing identifier,
                    // give a good message about an identifier being missing, and then consume the
                    // rest of the binary expression.
                    if (isBinaryOperator()) {
                        return true;
                    }
                    return isIdentifier();
            }
        }
        function isStartOfExpressionStatement() {
            // As per the grammar, none of '{' or 'function' or 'class' can start an expression statement.
            return token() !== 17 /* OpenBraceToken */ &&
                token() !== 89 /* FunctionKeyword */ &&
                token() !== 75 /* ClassKeyword */ &&
                token() !== 57 /* AtToken */ &&
                isStartOfExpression();
        }
        function parseExpression() {
            // Expression[in]:
            //      AssignmentExpression[in]
            //      Expression[in] , AssignmentExpression[in]
            // clear the decorator context when parsing Expression, as it should be unambiguous when parsing a decorator
            var saveDecoratorContext = inDecoratorContext();
            if (saveDecoratorContext) {
                setDecoratorContext(/*val*/ false);
            }
            var expr = parseAssignmentExpressionOrHigher();
            var operatorToken;
            while ((operatorToken = parseOptionalToken(26 /* CommaToken */))) {
                expr = makeBinaryExpression(expr, operatorToken, parseAssignmentExpressionOrHigher());
            }
            if (saveDecoratorContext) {
                setDecoratorContext(/*val*/ true);
            }
            return expr;
        }
        function parseInitializer() {
            return parseOptional(58 /* EqualsToken */) ? parseAssignmentExpressionOrHigher() : undefined;
        }
        function parseAssignmentExpressionOrHigher() {
            //  AssignmentExpression[in,yield]:
            //      1) ConditionalExpression[?in,?yield]
            //      2) LeftHandSideExpression = AssignmentExpression[?in,?yield]
            //      3) LeftHandSideExpression AssignmentOperator AssignmentExpression[?in,?yield]
            //      4) ArrowFunctionExpression[?in,?yield]
            //      5) AsyncArrowFunctionExpression[in,yield,await]
            //      6) [+Yield] YieldExpression[?In]
            //
            // Note: for ease of implementation we treat productions '2' and '3' as the same thing.
            // (i.e. they're both BinaryExpressions with an assignment operator in it).
            // First, do the simple check if we have a YieldExpression (production '6').
            if (isYieldExpression()) {
                return parseYieldExpression();
            }
            // Then, check if we have an arrow function (production '4' and '5') that starts with a parenthesized
            // parameter list or is an async arrow function.
            // AsyncArrowFunctionExpression:
            //      1) async[no LineTerminator here]AsyncArrowBindingIdentifier[?Yield][no LineTerminator here]=>AsyncConciseBody[?In]
            //      2) CoverCallExpressionAndAsyncArrowHead[?Yield, ?Await][no LineTerminator here]=>AsyncConciseBody[?In]
            // Production (1) of AsyncArrowFunctionExpression is parsed in "tryParseAsyncSimpleArrowFunctionExpression".
            // And production (2) is parsed in "tryParseParenthesizedArrowFunctionExpression".
            //
            // If we do successfully parse arrow-function, we must *not* recurse for productions 1, 2 or 3. An ArrowFunction is
            // not a LeftHandSideExpression, nor does it start a ConditionalExpression.  So we are done
            // with AssignmentExpression if we see one.
            var arrowExpression = tryParseParenthesizedArrowFunctionExpression() || tryParseAsyncSimpleArrowFunctionExpression();
            if (arrowExpression) {
                return arrowExpression;
            }
            // Now try to see if we're in production '1', '2' or '3'.  A conditional expression can
            // start with a LogicalOrExpression, while the assignment productions can only start with
            // LeftHandSideExpressions.
            //
            // So, first, we try to just parse out a BinaryExpression.  If we get something that is a
            // LeftHandSide or higher, then we can try to parse out the assignment expression part.
            // Otherwise, we try to parse out the conditional expression bit.  We want to allow any
            // binary expression here, so we pass in the 'lowest' precedence here so that it matches
            // and consumes anything.
            var expr = parseBinaryExpressionOrHigher(/*precedence*/ 0);
            // To avoid a look-ahead, we did not handle the case of an arrow function with a single un-parenthesized
            // parameter ('x => ...') above. We handle it here by checking if the parsed expression was a single
            // identifier and the current token is an arrow.
            if (expr.kind === 71 /* Identifier */ && token() === 36 /* EqualsGreaterThanToken */) {
                return parseSimpleArrowFunctionExpression(expr);
            }
            // Now see if we might be in cases '2' or '3'.
            // If the expression was a LHS expression, and we have an assignment operator, then
            // we're in '2' or '3'. Consume the assignment and return.
            //
            // Note: we call reScanGreaterToken so that we get an appropriately merged token
            // for cases like `> > =` becoming `>>=`
            if (ts.isLeftHandSideExpression(expr) && ts.isAssignmentOperator(reScanGreaterToken())) {
                return makeBinaryExpression(expr, parseTokenNode(), parseAssignmentExpressionOrHigher());
            }
            // It wasn't an assignment or a lambda.  This is a conditional expression:
            return parseConditionalExpressionRest(expr);
        }
        function isYieldExpression() {
            if (token() === 116 /* YieldKeyword */) {
                // If we have a 'yield' keyword, and this is a context where yield expressions are
                // allowed, then definitely parse out a yield expression.
                if (inYieldContext()) {
                    return true;
                }
                // We're in a context where 'yield expr' is not allowed.  However, if we can
                // definitely tell that the user was trying to parse a 'yield expr' and not
                // just a normal expr that start with a 'yield' identifier, then parse out
                // a 'yield expr'.  We can then report an error later that they are only
                // allowed in generator expressions.
                //
                // for example, if we see 'yield(foo)', then we'll have to treat that as an
                // invocation expression of something called 'yield'.  However, if we have
                // 'yield foo' then that is not legal as a normal expression, so we can
                // definitely recognize this as a yield expression.
                //
                // for now we just check if the next token is an identifier.  More heuristics
                // can be added here later as necessary.  We just need to make sure that we
                // don't accidentally consume something legal.
                return lookAhead(nextTokenIsIdentifierOrKeywordOrLiteralOnSameLine);
            }
            return false;
        }
        function nextTokenIsIdentifierOnSameLine() {
            nextToken();
            return !scanner.hasPrecedingLineBreak() && isIdentifier();
        }
        function parseYieldExpression() {
            var node = createNode(203 /* YieldExpression */);
            // YieldExpression[In] :
            //      yield
            //      yield [no LineTerminator here] [Lexical goal InputElementRegExp]AssignmentExpression[?In, Yield]
            //      yield [no LineTerminator here] * [Lexical goal InputElementRegExp]AssignmentExpression[?In, Yield]
            nextToken();
            if (!scanner.hasPrecedingLineBreak() &&
                (token() === 39 /* AsteriskToken */ || isStartOfExpression())) {
                node.asteriskToken = parseOptionalToken(39 /* AsteriskToken */);
                node.expression = parseAssignmentExpressionOrHigher();
                return finishNode(node);
            }
            else {
                // if the next token is not on the same line as yield.  or we don't have an '*' or
                // the start of an expression, then this is just a simple "yield" expression.
                return finishNode(node);
            }
        }
        function parseSimpleArrowFunctionExpression(identifier, asyncModifier) {
            ts.Debug.assert(token() === 36 /* EqualsGreaterThanToken */, "parseSimpleArrowFunctionExpression should only have been called if we had a =>");
            var node;
            if (asyncModifier) {
                node = createNode(193 /* ArrowFunction */, asyncModifier.pos);
                node.modifiers = asyncModifier;
            }
            else {
                node = createNode(193 /* ArrowFunction */, identifier.pos);
            }
            var parameter = createNode(149 /* Parameter */, identifier.pos);
            parameter.name = identifier;
            finishNode(parameter);
            node.parameters = createNodeArray([parameter], parameter.pos, parameter.end);
            node.equalsGreaterThanToken = parseExpectedToken(36 /* EqualsGreaterThanToken */);
            node.body = parseArrowFunctionExpressionBody(/*isAsync*/ !!asyncModifier);
            return addJSDocComment(finishNode(node));
        }
        function tryParseParenthesizedArrowFunctionExpression() {
            var triState = isParenthesizedArrowFunctionExpression();
            if (triState === 0 /* False */) {
                // It's definitely not a parenthesized arrow function expression.
                return undefined;
            }
            // If we definitely have an arrow function, then we can just parse one, not requiring a
            // following => or { token. Otherwise, we *might* have an arrow function.  Try to parse
            // it out, but don't allow any ambiguity, and return 'undefined' if this could be an
            // expression instead.
            var arrowFunction = triState === 1 /* True */
                ? parseParenthesizedArrowFunctionExpressionHead(/*allowAmbiguity*/ true)
                : tryParse(parsePossibleParenthesizedArrowFunctionExpressionHead);
            if (!arrowFunction) {
                // Didn't appear to actually be a parenthesized arrow function.  Just bail out.
                return undefined;
            }
            var isAsync = ts.hasModifier(arrowFunction, 256 /* Async */);
            // If we have an arrow, then try to parse the body. Even if not, try to parse if we
            // have an opening brace, just in case we're in an error state.
            var lastToken = token();
            arrowFunction.equalsGreaterThanToken = parseExpectedToken(36 /* EqualsGreaterThanToken */);
            arrowFunction.body = (lastToken === 36 /* EqualsGreaterThanToken */ || lastToken === 17 /* OpenBraceToken */)
                ? parseArrowFunctionExpressionBody(isAsync)
                : parseIdentifier();
            return finishNode(arrowFunction);
        }
        //  True        -> We definitely expect a parenthesized arrow function here.
        //  False       -> There *cannot* be a parenthesized arrow function here.
        //  Unknown     -> There *might* be a parenthesized arrow function here.
        //                 Speculatively look ahead to be sure, and rollback if not.
        function isParenthesizedArrowFunctionExpression() {
            if (token() === 19 /* OpenParenToken */ || token() === 27 /* LessThanToken */ || token() === 120 /* AsyncKeyword */) {
                return lookAhead(isParenthesizedArrowFunctionExpressionWorker);
            }
            if (token() === 36 /* EqualsGreaterThanToken */) {
                // ERROR RECOVERY TWEAK:
                // If we see a standalone => try to parse it as an arrow function expression as that's
                // likely what the user intended to write.
                return 1 /* True */;
            }
            // Definitely not a parenthesized arrow function.
            return 0 /* False */;
        }
        function isParenthesizedArrowFunctionExpressionWorker() {
            if (token() === 120 /* AsyncKeyword */) {
                nextToken();
                if (scanner.hasPrecedingLineBreak()) {
                    return 0 /* False */;
                }
                if (token() !== 19 /* OpenParenToken */ && token() !== 27 /* LessThanToken */) {
                    return 0 /* False */;
                }
            }
            var first = token();
            var second = nextToken();
            if (first === 19 /* OpenParenToken */) {
                if (second === 20 /* CloseParenToken */) {
                    // Simple cases: "() =>", "(): ", and "() {".
                    // This is an arrow function with no parameters.
                    // The last one is not actually an arrow function,
                    // but this is probably what the user intended.
                    var third = nextToken();
                    switch (third) {
                        case 36 /* EqualsGreaterThanToken */:
                        case 56 /* ColonToken */:
                        case 17 /* OpenBraceToken */:
                            return 1 /* True */;
                        default:
                            return 0 /* False */;
                    }
                }
                // If encounter "([" or "({", this could be the start of a binding pattern.
                // Examples:
                //      ([ x ]) => { }
                //      ({ x }) => { }
                //      ([ x ])
                //      ({ x })
                if (second === 21 /* OpenBracketToken */ || second === 17 /* OpenBraceToken */) {
                    return 2 /* Unknown */;
                }
                // Simple case: "(..."
                // This is an arrow function with a rest parameter.
                if (second === 24 /* DotDotDotToken */) {
                    return 1 /* True */;
                }
                // Check for "(xxx yyy", where xxx is a modifier and yyy is an identifier. This
                // isn't actually allowed, but we want to treat it as a lambda so we can provide
                // a good error message.
                if (ts.isModifierKind(second) && second !== 120 /* AsyncKeyword */ && lookAhead(nextTokenIsIdentifier)) {
                    return 1 /* True */;
                }
                // If we had "(" followed by something that's not an identifier,
                // then this definitely doesn't look like a lambda.
                if (!isIdentifier()) {
                    return 0 /* False */;
                }
                switch (nextToken()) {
                    case 56 /* ColonToken */:
                        // If we have something like "(a:", then we must have a
                        // type-annotated parameter in an arrow function expression.
                        return 1 /* True */;
                    case 55 /* QuestionToken */:
                        nextToken();
                        // If we have "(a?:" or "(a?," or "(a?=" or "(a?)" then it is definitely a lambda.
                        if (token() === 56 /* ColonToken */ || token() === 26 /* CommaToken */ || token() === 58 /* EqualsToken */ || token() === 20 /* CloseParenToken */) {
                            return 1 /* True */;
                        }
                        // Otherwise it is definitely not a lambda.
                        return 0 /* False */;
                    case 26 /* CommaToken */:
                    case 58 /* EqualsToken */:
                    case 20 /* CloseParenToken */:
                        // If we have "(a," or "(a=" or "(a)" this *could* be an arrow function
                        return 2 /* Unknown */;
                }
                // It is definitely not an arrow function
                return 0 /* False */;
            }
            else {
                ts.Debug.assert(first === 27 /* LessThanToken */);
                // If we have "<" not followed by an identifier,
                // then this definitely is not an arrow function.
                if (!isIdentifier()) {
                    return 0 /* False */;
                }
                // JSX overrides
                if (sourceFile.languageVariant === 1 /* JSX */) {
                    var isArrowFunctionInJsx = lookAhead(function () {
                        var third = nextToken();
                        if (third === 85 /* ExtendsKeyword */) {
                            var fourth = nextToken();
                            switch (fourth) {
                                case 58 /* EqualsToken */:
                                case 29 /* GreaterThanToken */:
                                    return false;
                                default:
                                    return true;
                            }
                        }
                        else if (third === 26 /* CommaToken */) {
                            return true;
                        }
                        return false;
                    });
                    if (isArrowFunctionInJsx) {
                        return 1 /* True */;
                    }
                    return 0 /* False */;
                }
                // This *could* be a parenthesized arrow function.
                return 2 /* Unknown */;
            }
        }
        function parsePossibleParenthesizedArrowFunctionExpressionHead() {
            return parseParenthesizedArrowFunctionExpressionHead(/*allowAmbiguity*/ false);
        }
        function tryParseAsyncSimpleArrowFunctionExpression() {
            // We do a check here so that we won't be doing unnecessarily call to "lookAhead"
            if (token() === 120 /* AsyncKeyword */) {
                if (lookAhead(isUnParenthesizedAsyncArrowFunctionWorker) === 1 /* True */) {
                    var asyncModifier = parseModifiersForArrowFunction();
                    var expr = parseBinaryExpressionOrHigher(/*precedence*/ 0);
                    return parseSimpleArrowFunctionExpression(expr, asyncModifier);
                }
            }
            return undefined;
        }
        function isUnParenthesizedAsyncArrowFunctionWorker() {
            // AsyncArrowFunctionExpression:
            //      1) async[no LineTerminator here]AsyncArrowBindingIdentifier[?Yield][no LineTerminator here]=>AsyncConciseBody[?In]
            //      2) CoverCallExpressionAndAsyncArrowHead[?Yield, ?Await][no LineTerminator here]=>AsyncConciseBody[?In]
            if (token() === 120 /* AsyncKeyword */) {
                nextToken();
                // If the "async" is followed by "=>" token then it is not a beginning of an async arrow-function
                // but instead a simple arrow-function which will be parsed inside "parseAssignmentExpressionOrHigher"
                if (scanner.hasPrecedingLineBreak() || token() === 36 /* EqualsGreaterThanToken */) {
                    return 0 /* False */;
                }
                // Check for un-parenthesized AsyncArrowFunction
                var expr = parseBinaryExpressionOrHigher(/*precedence*/ 0);
                if (!scanner.hasPrecedingLineBreak() && expr.kind === 71 /* Identifier */ && token() === 36 /* EqualsGreaterThanToken */) {
                    return 1 /* True */;
                }
            }
            return 0 /* False */;
        }
        function parseParenthesizedArrowFunctionExpressionHead(allowAmbiguity) {
            var node = createNodeWithJSDoc(193 /* ArrowFunction */);
            node.modifiers = parseModifiersForArrowFunction();
            var isAsync = ts.hasModifier(node, 256 /* Async */) ? 2 /* Await */ : 0 /* None */;
            // Arrow functions are never generators.
            //
            // If we're speculatively parsing a signature for a parenthesized arrow function, then
            // we have to have a complete parameter list.  Otherwise we might see something like
            // a => (b => c)
            // And think that "(b =>" was actually a parenthesized arrow function with a missing
            // close paren.
            if (!fillSignature(56 /* ColonToken */, isAsync, node) && !allowAmbiguity) {
                return undefined;
            }
            // Parsing a signature isn't enough.
            // Parenthesized arrow signatures often look like other valid expressions.
            // For instance:
            //  - "(x = 10)" is an assignment expression parsed as a signature with a default parameter value.
            //  - "(x,y)" is a comma expression parsed as a signature with two parameters.
            //  - "a ? (b): c" will have "(b):" parsed as a signature with a return type annotation.
            //
            // So we need just a bit of lookahead to ensure that it can only be a signature.
            if (!allowAmbiguity && token() !== 36 /* EqualsGreaterThanToken */ && token() !== 17 /* OpenBraceToken */) {
                // Returning undefined here will cause our caller to rewind to where we started from.
                return undefined;
            }
            return node;
        }
        function parseArrowFunctionExpressionBody(isAsync) {
            if (token() === 17 /* OpenBraceToken */) {
                return parseFunctionBlock(isAsync ? 2 /* Await */ : 0 /* None */);
            }
            if (token() !== 25 /* SemicolonToken */ &&
                token() !== 89 /* FunctionKeyword */ &&
                token() !== 75 /* ClassKeyword */ &&
                isStartOfStatement() &&
                !isStartOfExpressionStatement()) {
                // Check if we got a plain statement (i.e. no expression-statements, no function/class expressions/declarations)
                //
                // Here we try to recover from a potential error situation in the case where the
                // user meant to supply a block. For example, if the user wrote:
                //
                //  a =>
                //      let v = 0;
                //  }
                //
                // they may be missing an open brace.  Check to see if that's the case so we can
                // try to recover better.  If we don't do this, then the next close curly we see may end
                // up preemptively closing the containing construct.
                //
                // Note: even when 'IgnoreMissingOpenBrace' is passed, parseBody will still error.
                return parseFunctionBlock(16 /* IgnoreMissingOpenBrace */ | (isAsync ? 2 /* Await */ : 0 /* None */));
            }
            return isAsync
                ? doInAwaitContext(parseAssignmentExpressionOrHigher)
                : doOutsideOfAwaitContext(parseAssignmentExpressionOrHigher);
        }
        function parseConditionalExpressionRest(leftOperand) {
            // Note: we are passed in an expression which was produced from parseBinaryExpressionOrHigher.
            var questionToken = parseOptionalToken(55 /* QuestionToken */);
            if (!questionToken) {
                return leftOperand;
            }
            // Note: we explicitly 'allowIn' in the whenTrue part of the condition expression, and
            // we do not that for the 'whenFalse' part.
            var node = createNode(201 /* ConditionalExpression */, leftOperand.pos);
            node.condition = leftOperand;
            node.questionToken = questionToken;
            node.whenTrue = doOutsideOfContext(disallowInAndDecoratorContext, parseAssignmentExpressionOrHigher);
            node.colonToken = parseExpectedToken(56 /* ColonToken */);
            node.whenFalse = ts.nodeIsPresent(node.colonToken)
                ? parseAssignmentExpressionOrHigher()
                : createMissingNode(71 /* Identifier */, /*reportAtCurrentPosition*/ false, ts.Diagnostics._0_expected, ts.tokenToString(56 /* ColonToken */));
            return finishNode(node);
        }
        function parseBinaryExpressionOrHigher(precedence) {
            var leftOperand = parseUnaryExpressionOrHigher();
            return parseBinaryExpressionRest(precedence, leftOperand);
        }
        function isInOrOfKeyword(t) {
            return t === 92 /* InKeyword */ || t === 145 /* OfKeyword */;
        }
        function parseBinaryExpressionRest(precedence, leftOperand) {
            while (true) {
                // We either have a binary operator here, or we're finished.  We call
                // reScanGreaterToken so that we merge token sequences like > and = into >=
                reScanGreaterToken();
                var newPrecedence = ts.getBinaryOperatorPrecedence(token());
                // Check the precedence to see if we should "take" this operator
                // - For left associative operator (all operator but **), consume the operator,
                //   recursively call the function below, and parse binaryExpression as a rightOperand
                //   of the caller if the new precedence of the operator is greater then or equal to the current precedence.
                //   For example:
                //      a - b - c;
                //            ^token; leftOperand = b. Return b to the caller as a rightOperand
                //      a * b - c
                //            ^token; leftOperand = b. Return b to the caller as a rightOperand
                //      a - b * c;
                //            ^token; leftOperand = b. Return b * c to the caller as a rightOperand
                // - For right associative operator (**), consume the operator, recursively call the function
                //   and parse binaryExpression as a rightOperand of the caller if the new precedence of
                //   the operator is strictly grater than the current precedence
                //   For example:
                //      a ** b ** c;
                //             ^^token; leftOperand = b. Return b ** c to the caller as a rightOperand
                //      a - b ** c;
                //            ^^token; leftOperand = b. Return b ** c to the caller as a rightOperand
                //      a ** b - c
                //             ^token; leftOperand = b. Return b to the caller as a rightOperand
                var consumeCurrentOperator = token() === 40 /* AsteriskAsteriskToken */ ?
                    newPrecedence >= precedence :
                    newPrecedence > precedence;
                if (!consumeCurrentOperator) {
                    break;
                }
                if (token() === 92 /* InKeyword */ && inDisallowInContext()) {
                    break;
                }
                if (token() === 118 /* AsKeyword */) {
                    // Make sure we *do* perform ASI for constructs like this:
                    //    var x = foo
                    //    as (Bar)
                    // This should be parsed as an initialized variable, followed
                    // by a function call to 'as' with the argument 'Bar'
                    if (scanner.hasPrecedingLineBreak()) {
                        break;
                    }
                    else {
                        nextToken();
                        leftOperand = makeAsExpression(leftOperand, parseType());
                    }
                }
                else {
                    leftOperand = makeBinaryExpression(leftOperand, parseTokenNode(), parseBinaryExpressionOrHigher(newPrecedence));
                }
            }
            return leftOperand;
        }
        function isBinaryOperator() {
            if (inDisallowInContext() && token() === 92 /* InKeyword */) {
                return false;
            }
            return ts.getBinaryOperatorPrecedence(token()) > 0;
        }
        function makeBinaryExpression(left, operatorToken, right) {
            var node = createNode(200 /* BinaryExpression */, left.pos);
            node.left = left;
            node.operatorToken = operatorToken;
            node.right = right;
            return finishNode(node);
        }
        function makeAsExpression(left, right) {
            var node = createNode(208 /* AsExpression */, left.pos);
            node.expression = left;
            node.type = right;
            return finishNode(node);
        }
        function parsePrefixUnaryExpression() {
            var node = createNode(198 /* PrefixUnaryExpression */);
            node.operator = token();
            nextToken();
            node.operand = parseSimpleUnaryExpression();
            return finishNode(node);
        }
        function parseDeleteExpression() {
            var node = createNode(194 /* DeleteExpression */);
            nextToken();
            node.expression = parseSimpleUnaryExpression();
            return finishNode(node);
        }
        function parseTypeOfExpression() {
            var node = createNode(195 /* TypeOfExpression */);
            nextToken();
            node.expression = parseSimpleUnaryExpression();
            return finishNode(node);
        }
        function parseVoidExpression() {
            var node = createNode(196 /* VoidExpression */);
            nextToken();
            node.expression = parseSimpleUnaryExpression();
            return finishNode(node);
        }
        function isAwaitExpression() {
            if (token() === 121 /* AwaitKeyword */) {
                if (inAwaitContext()) {
                    return true;
                }
                // here we are using similar heuristics as 'isYieldExpression'
                return lookAhead(nextTokenIsIdentifierOrKeywordOrLiteralOnSameLine);
            }
            return false;
        }
        function parseAwaitExpression() {
            var node = createNode(197 /* AwaitExpression */);
            nextToken();
            node.expression = parseSimpleUnaryExpression();
            return finishNode(node);
        }
        /**
         * Parse ES7 exponential expression and await expression
         *
         * ES7 ExponentiationExpression:
         *      1) UnaryExpression[?Yield]
         *      2) UpdateExpression[?Yield] ** ExponentiationExpression[?Yield]
         *
         */
        function parseUnaryExpressionOrHigher() {
            /**
             * ES7 UpdateExpression:
             *      1) LeftHandSideExpression[?Yield]
             *      2) LeftHandSideExpression[?Yield][no LineTerminator here]++
             *      3) LeftHandSideExpression[?Yield][no LineTerminator here]--
             *      4) ++UnaryExpression[?Yield]
             *      5) --UnaryExpression[?Yield]
             */
            if (isUpdateExpression()) {
                var updateExpression = parseUpdateExpression();
                return token() === 40 /* AsteriskAsteriskToken */ ?
                    parseBinaryExpressionRest(ts.getBinaryOperatorPrecedence(token()), updateExpression) :
                    updateExpression;
            }
            /**
             * ES7 UnaryExpression:
             *      1) UpdateExpression[?yield]
             *      2) delete UpdateExpression[?yield]
             *      3) void UpdateExpression[?yield]
             *      4) typeof UpdateExpression[?yield]
             *      5) + UpdateExpression[?yield]
             *      6) - UpdateExpression[?yield]
             *      7) ~ UpdateExpression[?yield]
             *      8) ! UpdateExpression[?yield]
             */
            var unaryOperator = token();
            var simpleUnaryExpression = parseSimpleUnaryExpression();
            if (token() === 40 /* AsteriskAsteriskToken */) {
                var pos = ts.skipTrivia(sourceText, simpleUnaryExpression.pos);
                var end = simpleUnaryExpression.end;
                if (simpleUnaryExpression.kind === 190 /* TypeAssertionExpression */) {
                    parseErrorAt(pos, end, ts.Diagnostics.A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses);
                }
                else {
                    parseErrorAt(pos, end, ts.Diagnostics.An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses, ts.tokenToString(unaryOperator));
                }
            }
            return simpleUnaryExpression;
        }
        /**
         * Parse ES7 simple-unary expression or higher:
         *
         * ES7 UnaryExpression:
         *      1) UpdateExpression[?yield]
         *      2) delete UnaryExpression[?yield]
         *      3) void UnaryExpression[?yield]
         *      4) typeof UnaryExpression[?yield]
         *      5) + UnaryExpression[?yield]
         *      6) - UnaryExpression[?yield]
         *      7) ~ UnaryExpression[?yield]
         *      8) ! UnaryExpression[?yield]
         *      9) [+Await] await UnaryExpression[?yield]
         */
        function parseSimpleUnaryExpression() {
            switch (token()) {
                case 37 /* PlusToken */:
                case 38 /* MinusToken */:
                case 52 /* TildeToken */:
                case 51 /* ExclamationToken */:
                    return parsePrefixUnaryExpression();
                case 80 /* DeleteKeyword */:
                    return parseDeleteExpression();
                case 103 /* TypeOfKeyword */:
                    return parseTypeOfExpression();
                case 105 /* VoidKeyword */:
                    return parseVoidExpression();
                case 27 /* LessThanToken */:
                    // This is modified UnaryExpression grammar in TypeScript
                    //  UnaryExpression (modified):
                    //      < type > UnaryExpression
                    return parseTypeAssertion();
                case 121 /* AwaitKeyword */:
                    if (isAwaitExpression()) {
                        return parseAwaitExpression();
                    }
                // falls through
                default:
                    return parseUpdateExpression();
            }
        }
        /**
         * Check if the current token can possibly be an ES7 increment expression.
         *
         * ES7 UpdateExpression:
         *      LeftHandSideExpression[?Yield]
         *      LeftHandSideExpression[?Yield][no LineTerminator here]++
         *      LeftHandSideExpression[?Yield][no LineTerminator here]--
         *      ++LeftHandSideExpression[?Yield]
         *      --LeftHandSideExpression[?Yield]
         */
        function isUpdateExpression() {
            // This function is called inside parseUnaryExpression to decide
            // whether to call parseSimpleUnaryExpression or call parseUpdateExpression directly
            switch (token()) {
                case 37 /* PlusToken */:
                case 38 /* MinusToken */:
                case 52 /* TildeToken */:
                case 51 /* ExclamationToken */:
                case 80 /* DeleteKeyword */:
                case 103 /* TypeOfKeyword */:
                case 105 /* VoidKeyword */:
                case 121 /* AwaitKeyword */:
                    return false;
                case 27 /* LessThanToken */:
                    // If we are not in JSX context, we are parsing TypeAssertion which is an UnaryExpression
                    if (sourceFile.languageVariant !== 1 /* JSX */) {
                        return false;
                    }
                // We are in JSX context and the token is part of JSXElement.
                // falls through
                default:
                    return true;
            }
        }
        /**
         * Parse ES7 UpdateExpression. UpdateExpression is used instead of ES6's PostFixExpression.
         *
         * ES7 UpdateExpression[yield]:
         *      1) LeftHandSideExpression[?yield]
         *      2) LeftHandSideExpression[?yield] [[no LineTerminator here]]++
         *      3) LeftHandSideExpression[?yield] [[no LineTerminator here]]--
         *      4) ++LeftHandSideExpression[?yield]
         *      5) --LeftHandSideExpression[?yield]
         * In TypeScript (2), (3) are parsed as PostfixUnaryExpression. (4), (5) are parsed as PrefixUnaryExpression
         */
        function parseUpdateExpression() {
            if (token() === 43 /* PlusPlusToken */ || token() === 44 /* MinusMinusToken */) {
                var node = createNode(198 /* PrefixUnaryExpression */);
                node.operator = token();
                nextToken();
                node.operand = parseLeftHandSideExpressionOrHigher();
                return finishNode(node);
            }
            else if (sourceFile.languageVariant === 1 /* JSX */ && token() === 27 /* LessThanToken */ && lookAhead(nextTokenIsIdentifierOrKeywordOrGreaterThan)) {
                // JSXElement is part of primaryExpression
                return parseJsxElementOrSelfClosingElementOrFragment(/*inExpressionContext*/ true);
            }
            var expression = parseLeftHandSideExpressionOrHigher();
            ts.Debug.assert(ts.isLeftHandSideExpression(expression));
            if ((token() === 43 /* PlusPlusToken */ || token() === 44 /* MinusMinusToken */) && !scanner.hasPrecedingLineBreak()) {
                var node = createNode(199 /* PostfixUnaryExpression */, expression.pos);
                node.operand = expression;
                node.operator = token();
                nextToken();
                return finishNode(node);
            }
            return expression;
        }
        function parseLeftHandSideExpressionOrHigher() {
            // Original Ecma:
            // LeftHandSideExpression: See 11.2
            //      NewExpression
            //      CallExpression
            //
            // Our simplification:
            //
            // LeftHandSideExpression: See 11.2
            //      MemberExpression
            //      CallExpression
            //
            // See comment in parseMemberExpressionOrHigher on how we replaced NewExpression with
            // MemberExpression to make our lives easier.
            //
            // to best understand the below code, it's important to see how CallExpression expands
            // out into its own productions:
            //
            // CallExpression:
            //      MemberExpression Arguments
            //      CallExpression Arguments
            //      CallExpression[Expression]
            //      CallExpression.IdentifierName
            //      import (AssignmentExpression)
            //      super Arguments
            //      super.IdentifierName
            //
            // Because of the recursion in these calls, we need to bottom out first. There are three
            // bottom out states we can run into: 1) We see 'super' which must start either of
            // the last two CallExpression productions. 2) We see 'import' which must start import call.
            // 3)we have a MemberExpression which either completes the LeftHandSideExpression,
            // or starts the beginning of the first four CallExpression productions.
            var expression;
            if (token() === 91 /* ImportKeyword */) {
                if (lookAhead(nextTokenIsOpenParenOrLessThan)) {
                    // We don't want to eagerly consume all import keyword as import call expression so we look ahead to find "("
                    // For example:
                    //      var foo3 = require("subfolder
                    //      import * as foo1 from "module-from-node
                    // We want this import to be a statement rather than import call expression
                    sourceFile.flags |= 524288 /* PossiblyContainsDynamicImport */;
                    expression = parseTokenNode();
                }
                else if (lookAhead(nextTokenIsDot)) {
                    // This is an 'import.*' metaproperty (i.e. 'import.meta')
                    var fullStart = scanner.getStartPos();
                    nextToken(); // advance past the 'import'
                    nextToken(); // advance past the dot
                    var node = createNode(210 /* MetaProperty */, fullStart);
                    node.keywordToken = 91 /* ImportKeyword */;
                    node.name = parseIdentifierName();
                    expression = finishNode(node);
                    sourceFile.flags |= 1048576 /* PossiblyContainsImportMeta */;
                }
                else {
                    expression = parseMemberExpressionOrHigher();
                }
            }
            else {
                expression = token() === 97 /* SuperKeyword */ ? parseSuperExpression() : parseMemberExpressionOrHigher();
            }
            // Now, we *may* be complete.  However, we might have consumed the start of a
            // CallExpression.  As such, we need to consume the rest of it here to be complete.
            return parseCallExpressionRest(expression);
        }
        function parseMemberExpressionOrHigher() {
            // Note: to make our lives simpler, we decompose the NewExpression productions and
            // place ObjectCreationExpression and FunctionExpression into PrimaryExpression.
            // like so:
            //
            //   PrimaryExpression : See 11.1
            //      this
            //      Identifier
            //      Literal
            //      ArrayLiteral
            //      ObjectLiteral
            //      (Expression)
            //      FunctionExpression
            //      new MemberExpression Arguments?
            //
            //   MemberExpression : See 11.2
            //      PrimaryExpression
            //      MemberExpression[Expression]
            //      MemberExpression.IdentifierName
            //
            //   CallExpression : See 11.2
            //      MemberExpression
            //      CallExpression Arguments
            //      CallExpression[Expression]
            //      CallExpression.IdentifierName
            //
            // Technically this is ambiguous.  i.e. CallExpression defines:
            //
            //   CallExpression:
            //      CallExpression Arguments
            //
            // If you see: "new Foo()"
            //
            // Then that could be treated as a single ObjectCreationExpression, or it could be
            // treated as the invocation of "new Foo".  We disambiguate that in code (to match
            // the original grammar) by making sure that if we see an ObjectCreationExpression
            // we always consume arguments if they are there. So we treat "new Foo()" as an
            // object creation only, and not at all as an invocation.  Another way to think
            // about this is that for every "new" that we see, we will consume an argument list if
            // it is there as part of the *associated* object creation node.  Any additional
            // argument lists we see, will become invocation expressions.
            //
            // Because there are no other places in the grammar now that refer to FunctionExpression
            // or ObjectCreationExpression, it is safe to push down into the PrimaryExpression
            // production.
            //
            // Because CallExpression and MemberExpression are left recursive, we need to bottom out
            // of the recursion immediately.  So we parse out a primary expression to start with.
            var expression = parsePrimaryExpression();
            return parseMemberExpressionRest(expression);
        }
        function parseSuperExpression() {
            var expression = parseTokenNode();
            if (token() === 19 /* OpenParenToken */ || token() === 23 /* DotToken */ || token() === 21 /* OpenBracketToken */) {
                return expression;
            }
            // If we have seen "super" it must be followed by '(' or '.'.
            // If it wasn't then just try to parse out a '.' and report an error.
            var node = createNode(185 /* PropertyAccessExpression */, expression.pos);
            node.expression = expression;
            parseExpectedToken(23 /* DotToken */, ts.Diagnostics.super_must_be_followed_by_an_argument_list_or_member_access);
            node.name = parseRightSideOfDot(/*allowIdentifierNames*/ true);
            return finishNode(node);
        }
        function parseJsxElementOrSelfClosingElementOrFragment(inExpressionContext) {
            var opening = parseJsxOpeningOrSelfClosingElementOrOpeningFragment(inExpressionContext);
            var result;
            if (opening.kind === 257 /* JsxOpeningElement */) {
                var node = createNode(255 /* JsxElement */, opening.pos);
                node.openingElement = opening;
                node.children = parseJsxChildren(node.openingElement);
                node.closingElement = parseJsxClosingElement(inExpressionContext);
                if (!tagNamesAreEquivalent(node.openingElement.tagName, node.closingElement.tagName)) {
                    parseErrorAtRange(node.closingElement, ts.Diagnostics.Expected_corresponding_JSX_closing_tag_for_0, ts.getTextOfNodeFromSourceText(sourceText, node.openingElement.tagName));
                }
                result = finishNode(node);
            }
            else if (opening.kind === 260 /* JsxOpeningFragment */) {
                var node = createNode(259 /* JsxFragment */, opening.pos);
                node.openingFragment = opening;
                node.children = parseJsxChildren(node.openingFragment);
                node.closingFragment = parseJsxClosingFragment(inExpressionContext);
                result = finishNode(node);
            }
            else {
                ts.Debug.assert(opening.kind === 256 /* JsxSelfClosingElement */);
                // Nothing else to do for self-closing elements
                result = opening;
            }
            // If the user writes the invalid code '<div></div><div></div>' in an expression context (i.e. not wrapped in
            // an enclosing tag), we'll naively try to parse   ^ this as a 'less than' operator and the remainder of the tag
            // as garbage, which will cause the formatter to badly mangle the JSX. Perform a speculative parse of a JSX
            // element if we see a < token so that we can wrap it in a synthetic binary expression so the formatter
            // does less damage and we can report a better error.
            // Since JSX elements are invalid < operands anyway, this lookahead parse will only occur in error scenarios
            // of one sort or another.
            if (inExpressionContext && token() === 27 /* LessThanToken */) {
                var invalidElement = tryParse(function () { return parseJsxElementOrSelfClosingElementOrFragment(/*inExpressionContext*/ true); });
                if (invalidElement) {
                    parseErrorAtCurrentToken(ts.Diagnostics.JSX_expressions_must_have_one_parent_element);
                    var badNode = createNode(200 /* BinaryExpression */, result.pos);
                    badNode.end = invalidElement.end;
                    badNode.left = result;
                    badNode.right = invalidElement;
                    badNode.operatorToken = createMissingNode(26 /* CommaToken */, /*reportAtCurrentPosition*/ false, /*diagnosticMessage*/ undefined); // TODO: GH#18217
                    badNode.operatorToken.pos = badNode.operatorToken.end = badNode.right.pos;
                    return badNode;
                }
            }
            return result;
        }
        function parseJsxText() {
            var node = createNode(10 /* JsxText */);
            node.containsOnlyWhiteSpaces = currentToken === 11 /* JsxTextAllWhiteSpaces */;
            currentToken = scanner.scanJsxToken();
            return finishNode(node);
        }
        function parseJsxChild(openingTag, token) {
            switch (token) {
                case 1 /* EndOfFileToken */:
                    // If we hit EOF, issue the error at the tag that lacks the closing element
                    // rather than at the end of the file (which is useless)
                    if (ts.isJsxOpeningFragment(openingTag)) {
                        parseErrorAtRange(openingTag, ts.Diagnostics.JSX_fragment_has_no_corresponding_closing_tag);
                    }
                    else {
                        parseErrorAtRange(openingTag.tagName, ts.Diagnostics.JSX_element_0_has_no_corresponding_closing_tag, ts.getTextOfNodeFromSourceText(sourceText, openingTag.tagName));
                    }
                    return undefined;
                case 28 /* LessThanSlashToken */:
                case 7 /* ConflictMarkerTrivia */:
                    return undefined;
                case 10 /* JsxText */:
                case 11 /* JsxTextAllWhiteSpaces */:
                    return parseJsxText();
                case 17 /* OpenBraceToken */:
                    return parseJsxExpression(/*inExpressionContext*/ false);
                case 27 /* LessThanToken */:
                    return parseJsxElementOrSelfClosingElementOrFragment(/*inExpressionContext*/ false);
                default:
                    return ts.Debug.assertNever(token);
            }
        }
        function parseJsxChildren(openingTag) {
            var list = [];
            var listPos = getNodePos();
            var saveParsingContext = parsingContext;
            parsingContext |= 1 << 14 /* JsxChildren */;
            while (true) {
                var child = parseJsxChild(openingTag, currentToken = scanner.reScanJsxToken());
                if (!child)
                    break;
                list.push(child);
            }
            parsingContext = saveParsingContext;
            return createNodeArray(list, listPos);
        }
        function parseJsxAttributes() {
            var jsxAttributes = createNode(263 /* JsxAttributes */);
            jsxAttributes.properties = parseList(13 /* JsxAttributes */, parseJsxAttribute);
            return finishNode(jsxAttributes);
        }
        function parseJsxOpeningOrSelfClosingElementOrOpeningFragment(inExpressionContext) {
            var fullStart = scanner.getStartPos();
            parseExpected(27 /* LessThanToken */);
            if (token() === 29 /* GreaterThanToken */) {
                // See below for explanation of scanJsxText
                var node_1 = createNode(260 /* JsxOpeningFragment */, fullStart);
                scanJsxText();
                return finishNode(node_1);
            }
            var tagName = parseJsxElementName();
            var typeArguments = tryParseTypeArguments();
            var attributes = parseJsxAttributes();
            var node;
            if (token() === 29 /* GreaterThanToken */) {
                // Closing tag, so scan the immediately-following text with the JSX scanning instead
                // of regular scanning to avoid treating illegal characters (e.g. '#') as immediate
                // scanning errors
                node = createNode(257 /* JsxOpeningElement */, fullStart);
                scanJsxText();
            }
            else {
                parseExpected(41 /* SlashToken */);
                if (inExpressionContext) {
                    parseExpected(29 /* GreaterThanToken */);
                }
                else {
                    parseExpected(29 /* GreaterThanToken */, /*diagnostic*/ undefined, /*shouldAdvance*/ false);
                    scanJsxText();
                }
                node = createNode(256 /* JsxSelfClosingElement */, fullStart);
            }
            node.tagName = tagName;
            node.typeArguments = typeArguments;
            node.attributes = attributes;
            return finishNode(node);
        }
        function parseJsxElementName() {
            scanJsxIdentifier();
            // JsxElement can have name in the form of
            //      propertyAccessExpression
            //      primaryExpression in the form of an identifier and "this" keyword
            // We can't just simply use parseLeftHandSideExpressionOrHigher because then we will start consider class,function etc as a keyword
            // We only want to consider "this" as a primaryExpression
            var expression = token() === 99 /* ThisKeyword */ ?
                parseTokenNode() : parseIdentifierName();
            while (parseOptional(23 /* DotToken */)) {
                var propertyAccess = createNode(185 /* PropertyAccessExpression */, expression.pos);
                propertyAccess.expression = expression;
                propertyAccess.name = parseRightSideOfDot(/*allowIdentifierNames*/ true);
                expression = finishNode(propertyAccess);
            }
            return expression;
        }
        function parseJsxExpression(inExpressionContext) {
            var node = createNode(265 /* JsxExpression */);
            if (!parseExpected(17 /* OpenBraceToken */)) {
                return undefined;
            }
            if (token() !== 18 /* CloseBraceToken */) {
                node.dotDotDotToken = parseOptionalToken(24 /* DotDotDotToken */);
                node.expression = parseAssignmentExpressionOrHigher();
            }
            if (inExpressionContext) {
                parseExpected(18 /* CloseBraceToken */);
            }
            else {
                parseExpected(18 /* CloseBraceToken */, /*message*/ undefined, /*shouldAdvance*/ false);
                scanJsxText();
            }
            return finishNode(node);
        }
        function parseJsxAttribute() {
            if (token() === 17 /* OpenBraceToken */) {
                return parseJsxSpreadAttribute();
            }
            scanJsxIdentifier();
            var node = createNode(262 /* JsxAttribute */);
            node.name = parseIdentifierName();
            if (token() === 58 /* EqualsToken */) {
                switch (scanJsxAttributeValue()) {
                    case 9 /* StringLiteral */:
                        node.initializer = parseLiteralNode();
                        break;
                    default:
                        node.initializer = parseJsxExpression(/*inExpressionContext*/ true);
                        break;
                }
            }
            return finishNode(node);
        }
        function parseJsxSpreadAttribute() {
            var node = createNode(264 /* JsxSpreadAttribute */);
            parseExpected(17 /* OpenBraceToken */);
            parseExpected(24 /* DotDotDotToken */);
            node.expression = parseExpression();
            parseExpected(18 /* CloseBraceToken */);
            return finishNode(node);
        }
        function parseJsxClosingElement(inExpressionContext) {
            var node = createNode(258 /* JsxClosingElement */);
            parseExpected(28 /* LessThanSlashToken */);
            node.tagName = parseJsxElementName();
            if (inExpressionContext) {
                parseExpected(29 /* GreaterThanToken */);
            }
            else {
                parseExpected(29 /* GreaterThanToken */, /*diagnostic*/ undefined, /*shouldAdvance*/ false);
                scanJsxText();
            }
            return finishNode(node);
        }
        function parseJsxClosingFragment(inExpressionContext) {
            var node = createNode(261 /* JsxClosingFragment */);
            parseExpected(28 /* LessThanSlashToken */);
            if (ts.tokenIsIdentifierOrKeyword(token())) {
                parseErrorAtRange(parseJsxElementName(), ts.Diagnostics.Expected_corresponding_closing_tag_for_JSX_fragment);
            }
            if (inExpressionContext) {
                parseExpected(29 /* GreaterThanToken */);
            }
            else {
                parseExpected(29 /* GreaterThanToken */, /*diagnostic*/ undefined, /*shouldAdvance*/ false);
                scanJsxText();
            }
            return finishNode(node);
        }
        function parseTypeAssertion() {
            var node = createNode(190 /* TypeAssertionExpression */);
            parseExpected(27 /* LessThanToken */);
            node.type = parseType();
            parseExpected(29 /* GreaterThanToken */);
            node.expression = parseSimpleUnaryExpression();
            return finishNode(node);
        }
        function parseMemberExpressionRest(expression) {
            while (true) {
                var dotToken = parseOptionalToken(23 /* DotToken */);
                if (dotToken) {
                    var propertyAccess = createNode(185 /* PropertyAccessExpression */, expression.pos);
                    propertyAccess.expression = expression;
                    propertyAccess.name = parseRightSideOfDot(/*allowIdentifierNames*/ true);
                    expression = finishNode(propertyAccess);
                    continue;
                }
                if (token() === 51 /* ExclamationToken */ && !scanner.hasPrecedingLineBreak()) {
                    nextToken();
                    var nonNullExpression = createNode(209 /* NonNullExpression */, expression.pos);
                    nonNullExpression.expression = expression;
                    expression = finishNode(nonNullExpression);
                    continue;
                }
                // when in the [Decorator] context, we do not parse ElementAccess as it could be part of a ComputedPropertyName
                if (!inDecoratorContext() && parseOptional(21 /* OpenBracketToken */)) {
                    var indexedAccess = createNode(186 /* ElementAccessExpression */, expression.pos);
                    indexedAccess.expression = expression;
                    if (token() === 22 /* CloseBracketToken */) {
                        indexedAccess.argumentExpression = createMissingNode(71 /* Identifier */, /*reportAtCurrentPosition*/ true, ts.Diagnostics.An_element_access_expression_should_take_an_argument);
                    }
                    else {
                        var argument = allowInAnd(parseExpression);
                        if (ts.isStringOrNumericLiteral(argument)) {
                            argument.text = internIdentifier(argument.text);
                        }
                        indexedAccess.argumentExpression = argument;
                    }
                    parseExpected(22 /* CloseBracketToken */);
                    expression = finishNode(indexedAccess);
                    continue;
                }
                if (isTemplateStartOfTaggedTemplate()) {
                    expression = parseTaggedTemplateRest(expression, /*typeArguments*/ undefined);
                    continue;
                }
                return expression;
            }
        }
        function isTemplateStartOfTaggedTemplate() {
            return token() === 13 /* NoSubstitutionTemplateLiteral */ || token() === 14 /* TemplateHead */;
        }
        function parseTaggedTemplateRest(tag, typeArguments) {
            var tagExpression = createNode(189 /* TaggedTemplateExpression */, tag.pos);
            tagExpression.tag = tag;
            tagExpression.typeArguments = typeArguments;
            tagExpression.template = token() === 13 /* NoSubstitutionTemplateLiteral */
                ? parseLiteralNode()
                : parseTemplateExpression();
            return finishNode(tagExpression);
        }
        function parseCallExpressionRest(expression) {
            while (true) {
                expression = parseMemberExpressionRest(expression);
                if (token() === 27 /* LessThanToken */) {
                    // See if this is the start of a generic invocation.  If so, consume it and
                    // keep checking for postfix expressions.  Otherwise, it's just a '<' that's
                    // part of an arithmetic expression.  Break out so we consume it higher in the
                    // stack.
                    var typeArguments = tryParse(parseTypeArgumentsInExpression);
                    if (!typeArguments) {
                        return expression;
                    }
                    if (isTemplateStartOfTaggedTemplate()) {
                        expression = parseTaggedTemplateRest(expression, typeArguments);
                        continue;
                    }
                    var callExpr = createNode(187 /* CallExpression */, expression.pos);
                    callExpr.expression = expression;
                    callExpr.typeArguments = typeArguments;
                    callExpr.arguments = parseArgumentList();
                    expression = finishNode(callExpr);
                    continue;
                }
                else if (token() === 19 /* OpenParenToken */) {
                    var callExpr = createNode(187 /* CallExpression */, expression.pos);
                    callExpr.expression = expression;
                    callExpr.arguments = parseArgumentList();
                    expression = finishNode(callExpr);
                    continue;
                }
                return expression;
            }
        }
        function parseArgumentList() {
            parseExpected(19 /* OpenParenToken */);
            var result = parseDelimitedList(11 /* ArgumentExpressions */, parseArgumentExpression);
            parseExpected(20 /* CloseParenToken */);
            return result;
        }
        function parseTypeArgumentsInExpression() {
            if (!parseOptional(27 /* LessThanToken */)) {
                return undefined;
            }
            var typeArguments = parseDelimitedList(19 /* TypeArguments */, parseType);
            if (!parseExpected(29 /* GreaterThanToken */)) {
                // If it doesn't have the closing `>` then it's definitely not an type argument list.
                return undefined;
            }
            // If we have a '<', then only parse this as a argument list if the type arguments
            // are complete and we have an open paren.  if we don't, rewind and return nothing.
            return typeArguments && canFollowTypeArgumentsInExpression()
                ? typeArguments
                : undefined;
        }
        function canFollowTypeArgumentsInExpression() {
            switch (token()) {
                case 19 /* OpenParenToken */: // foo<x>(
                case 13 /* NoSubstitutionTemplateLiteral */: // foo<T> `...`
                case 14 /* TemplateHead */: // foo<T> `...${100}...`
                // these are the only tokens can legally follow a type argument
                // list. So we definitely want to treat them as type arg lists.
                case 23 /* DotToken */: // foo<x>.
                case 20 /* CloseParenToken */: // foo<x>)
                case 22 /* CloseBracketToken */: // foo<x>]
                case 56 /* ColonToken */: // foo<x>:
                case 25 /* SemicolonToken */: // foo<x>;
                case 55 /* QuestionToken */: // foo<x>?
                case 32 /* EqualsEqualsToken */: // foo<x> ==
                case 34 /* EqualsEqualsEqualsToken */: // foo<x> ===
                case 33 /* ExclamationEqualsToken */: // foo<x> !=
                case 35 /* ExclamationEqualsEqualsToken */: // foo<x> !==
                case 53 /* AmpersandAmpersandToken */: // foo<x> &&
                case 54 /* BarBarToken */: // foo<x> ||
                case 50 /* CaretToken */: // foo<x> ^
                case 48 /* AmpersandToken */: // foo<x> &
                case 49 /* BarToken */: // foo<x> |
                case 18 /* CloseBraceToken */: // foo<x> }
                case 1 /* EndOfFileToken */: // foo<x>
                    // these cases can't legally follow a type arg list.  However, they're not legal
                    // expressions either.  The user is probably in the middle of a generic type. So
                    // treat it as such.
                    return true;
                case 26 /* CommaToken */: // foo<x>,
                case 17 /* OpenBraceToken */: // foo<x> {
                // We don't want to treat these as type arguments.  Otherwise we'll parse this
                // as an invocation expression.  Instead, we want to parse out the expression
                // in isolation from the type arguments.
                default:
                    // Anything else treat as an expression.
                    return false;
            }
        }
        function parsePrimaryExpression() {
            switch (token()) {
                case 8 /* NumericLiteral */:
                case 9 /* StringLiteral */:
                case 13 /* NoSubstitutionTemplateLiteral */:
                    return parseLiteralNode();
                case 99 /* ThisKeyword */:
                case 97 /* SuperKeyword */:
                case 95 /* NullKeyword */:
                case 101 /* TrueKeyword */:
                case 86 /* FalseKeyword */:
                    return parseTokenNode();
                case 19 /* OpenParenToken */:
                    return parseParenthesizedExpression();
                case 21 /* OpenBracketToken */:
                    return parseArrayLiteralExpression();
                case 17 /* OpenBraceToken */:
                    return parseObjectLiteralExpression();
                case 120 /* AsyncKeyword */:
                    // Async arrow functions are parsed earlier in parseAssignmentExpressionOrHigher.
                    // If we encounter `async [no LineTerminator here] function` then this is an async
                    // function; otherwise, its an identifier.
                    if (!lookAhead(nextTokenIsFunctionKeywordOnSameLine)) {
                        break;
                    }
                    return parseFunctionExpression();
                case 75 /* ClassKeyword */:
                    return parseClassExpression();
                case 89 /* FunctionKeyword */:
                    return parseFunctionExpression();
                case 94 /* NewKeyword */:
                    return parseNewExpressionOrNewDotTarget();
                case 41 /* SlashToken */:
                case 63 /* SlashEqualsToken */:
                    if (reScanSlashToken() === 12 /* RegularExpressionLiteral */) {
                        return parseLiteralNode();
                    }
                    break;
                case 14 /* TemplateHead */:
                    return parseTemplateExpression();
            }
            return parseIdentifier(ts.Diagnostics.Expression_expected);
        }
        function parseParenthesizedExpression() {
            var node = createNodeWithJSDoc(191 /* ParenthesizedExpression */);
            parseExpected(19 /* OpenParenToken */);
            node.expression = allowInAnd(parseExpression);
            parseExpected(20 /* CloseParenToken */);
            return finishNode(node);
        }
        function parseSpreadElement() {
            var node = createNode(204 /* SpreadElement */);
            parseExpected(24 /* DotDotDotToken */);
            node.expression = parseAssignmentExpressionOrHigher();
            return finishNode(node);
        }
        function parseArgumentOrArrayLiteralElement() {
            return token() === 24 /* DotDotDotToken */ ? parseSpreadElement() :
                token() === 26 /* CommaToken */ ? createNode(206 /* OmittedExpression */) :
                    parseAssignmentExpressionOrHigher();
        }
        function parseArgumentExpression() {
            return doOutsideOfContext(disallowInAndDecoratorContext, parseArgumentOrArrayLiteralElement);
        }
        function parseArrayLiteralExpression() {
            var node = createNode(183 /* ArrayLiteralExpression */);
            parseExpected(21 /* OpenBracketToken */);
            if (scanner.hasPrecedingLineBreak()) {
                node.multiLine = true;
            }
            node.elements = parseDelimitedList(15 /* ArrayLiteralMembers */, parseArgumentOrArrayLiteralElement);
            parseExpected(22 /* CloseBracketToken */);
            return finishNode(node);
        }
        function parseObjectLiteralElement() {
            var node = createNodeWithJSDoc(0 /* Unknown */);
            if (parseOptionalToken(24 /* DotDotDotToken */)) {
                node.kind = 272 /* SpreadAssignment */;
                node.expression = parseAssignmentExpressionOrHigher();
                return finishNode(node);
            }
            node.decorators = parseDecorators();
            node.modifiers = parseModifiers();
            if (parseContextualModifier(125 /* GetKeyword */)) {
                return parseAccessorDeclaration(node, 156 /* GetAccessor */);
            }
            if (parseContextualModifier(136 /* SetKeyword */)) {
                return parseAccessorDeclaration(node, 157 /* SetAccessor */);
            }
            var asteriskToken = parseOptionalToken(39 /* AsteriskToken */);
            var tokenIsIdentifier = isIdentifier();
            node.name = parsePropertyName();
            // Disallowing of optional property assignments happens in the grammar checker.
            node.questionToken = parseOptionalToken(55 /* QuestionToken */);
            if (asteriskToken || token() === 19 /* OpenParenToken */ || token() === 27 /* LessThanToken */) {
                return parseMethodDeclaration(node, asteriskToken);
            }
            // check if it is short-hand property assignment or normal property assignment
            // NOTE: if token is EqualsToken it is interpreted as CoverInitializedName production
            // CoverInitializedName[Yield] :
            //     IdentifierReference[?Yield] Initializer[In, ?Yield]
            // this is necessary because ObjectLiteral productions are also used to cover grammar for ObjectAssignmentPattern
            var isShorthandPropertyAssignment = tokenIsIdentifier && (token() === 26 /* CommaToken */ || token() === 18 /* CloseBraceToken */ || token() === 58 /* EqualsToken */);
            if (isShorthandPropertyAssignment) {
                node.kind = 271 /* ShorthandPropertyAssignment */;
                var equalsToken = parseOptionalToken(58 /* EqualsToken */);
                if (equalsToken) {
                    node.equalsToken = equalsToken;
                    node.objectAssignmentInitializer = allowInAnd(parseAssignmentExpressionOrHigher);
                }
            }
            else {
                node.kind = 270 /* PropertyAssignment */;
                parseExpected(56 /* ColonToken */);
                node.initializer = allowInAnd(parseAssignmentExpressionOrHigher);
            }
            return finishNode(node);
        }
        function parseObjectLiteralExpression() {
            var node = createNode(184 /* ObjectLiteralExpression */);
            parseExpected(17 /* OpenBraceToken */);
            if (scanner.hasPrecedingLineBreak()) {
                node.multiLine = true;
            }
            node.properties = parseDelimitedList(12 /* ObjectLiteralMembers */, parseObjectLiteralElement, /*considerSemicolonAsDelimiter*/ true);
            parseExpected(18 /* CloseBraceToken */);
            return finishNode(node);
        }
        function parseFunctionExpression() {
            // GeneratorExpression:
            //      function* BindingIdentifier [Yield][opt](FormalParameters[Yield]){ GeneratorBody }
            //
            // FunctionExpression:
            //      function BindingIdentifier[opt](FormalParameters){ FunctionBody }
            var saveDecoratorContext = inDecoratorContext();
            if (saveDecoratorContext) {
                setDecoratorContext(/*val*/ false);
            }
            var node = createNodeWithJSDoc(192 /* FunctionExpression */);
            node.modifiers = parseModifiers();
            parseExpected(89 /* FunctionKeyword */);
            node.asteriskToken = parseOptionalToken(39 /* AsteriskToken */);
            var isGenerator = node.asteriskToken ? 1 /* Yield */ : 0 /* None */;
            var isAsync = ts.hasModifier(node, 256 /* Async */) ? 2 /* Await */ : 0 /* None */;
            node.name =
                isGenerator && isAsync ? doInYieldAndAwaitContext(parseOptionalIdentifier) :
                    isGenerator ? doInYieldContext(parseOptionalIdentifier) :
                        isAsync ? doInAwaitContext(parseOptionalIdentifier) :
                            parseOptionalIdentifier();
            fillSignature(56 /* ColonToken */, isGenerator | isAsync, node);
            node.body = parseFunctionBlock(isGenerator | isAsync);
            if (saveDecoratorContext) {
                setDecoratorContext(/*val*/ true);
            }
            return finishNode(node);
        }
        function parseOptionalIdentifier() {
            return isIdentifier() ? parseIdentifier() : undefined;
        }
        function parseNewExpressionOrNewDotTarget() {
            var fullStart = scanner.getStartPos();
            parseExpected(94 /* NewKeyword */);
            if (parseOptional(23 /* DotToken */)) {
                var node_2 = createNode(210 /* MetaProperty */, fullStart);
                node_2.keywordToken = 94 /* NewKeyword */;
                node_2.name = parseIdentifierName();
                return finishNode(node_2);
            }
            var expression = parsePrimaryExpression();
            var typeArguments;
            while (true) {
                expression = parseMemberExpressionRest(expression);
                typeArguments = tryParse(parseTypeArgumentsInExpression);
                if (isTemplateStartOfTaggedTemplate()) {
                    ts.Debug.assert(!!typeArguments, "Expected a type argument list; all plain tagged template starts should be consumed in 'parseMemberExpressionRest'");
                    expression = parseTaggedTemplateRest(expression, typeArguments);
                    typeArguments = undefined;
                }
                break;
            }
            var node = createNode(188 /* NewExpression */, fullStart);
            node.expression = expression;
            node.typeArguments = typeArguments;
            if (node.typeArguments || token() === 19 /* OpenParenToken */) {
                node.arguments = parseArgumentList();
            }
            return finishNode(node);
        }
        // STATEMENTS
        function parseBlock(ignoreMissingOpenBrace, diagnosticMessage) {
            var node = createNode(213 /* Block */);
            if (parseExpected(17 /* OpenBraceToken */, diagnosticMessage) || ignoreMissingOpenBrace) {
                if (scanner.hasPrecedingLineBreak()) {
                    node.multiLine = true;
                }
                node.statements = parseList(1 /* BlockStatements */, parseStatement);
                parseExpected(18 /* CloseBraceToken */);
            }
            else {
                node.statements = createMissingList();
            }
            return finishNode(node);
        }
        function parseFunctionBlock(flags, diagnosticMessage) {
            var savedYieldContext = inYieldContext();
            setYieldContext(!!(flags & 1 /* Yield */));
            var savedAwaitContext = inAwaitContext();
            setAwaitContext(!!(flags & 2 /* Await */));
            // We may be in a [Decorator] context when parsing a function expression or
            // arrow function. The body of the function is not in [Decorator] context.
            var saveDecoratorContext = inDecoratorContext();
            if (saveDecoratorContext) {
                setDecoratorContext(/*val*/ false);
            }
            var block = parseBlock(!!(flags & 16 /* IgnoreMissingOpenBrace */), diagnosticMessage);
            if (saveDecoratorContext) {
                setDecoratorContext(/*val*/ true);
            }
            setYieldContext(savedYieldContext);
            setAwaitContext(savedAwaitContext);
            return block;
        }
        function parseEmptyStatement() {
            var node = createNode(215 /* EmptyStatement */);
            parseExpected(25 /* SemicolonToken */);
            return finishNode(node);
        }
        function parseIfStatement() {
            var node = createNode(217 /* IfStatement */);
            parseExpected(90 /* IfKeyword */);
            parseExpected(19 /* OpenParenToken */);
            node.expression = allowInAnd(parseExpression);
            parseExpected(20 /* CloseParenToken */);
            node.thenStatement = parseStatement();
            node.elseStatement = parseOptional(82 /* ElseKeyword */) ? parseStatement() : undefined;
            return finishNode(node);
        }
        function parseDoStatement() {
            var node = createNode(218 /* DoStatement */);
            parseExpected(81 /* DoKeyword */);
            node.statement = parseStatement();
            parseExpected(106 /* WhileKeyword */);
            parseExpected(19 /* OpenParenToken */);
            node.expression = allowInAnd(parseExpression);
            parseExpected(20 /* CloseParenToken */);
            // From: https://mail.mozilla.org/pipermail/es-discuss/2011-August/016188.html
            // 157 min --- All allen at wirfs-brock.com CONF --- "do{;}while(false)false" prohibited in
            // spec but allowed in consensus reality. Approved -- this is the de-facto standard whereby
            //  do;while(0)x will have a semicolon inserted before x.
            parseOptional(25 /* SemicolonToken */);
            return finishNode(node);
        }
        function parseWhileStatement() {
            var node = createNode(219 /* WhileStatement */);
            parseExpected(106 /* WhileKeyword */);
            parseExpected(19 /* OpenParenToken */);
            node.expression = allowInAnd(parseExpression);
            parseExpected(20 /* CloseParenToken */);
            node.statement = parseStatement();
            return finishNode(node);
        }
        function parseForOrForInOrForOfStatement() {
            var pos = getNodePos();
            parseExpected(88 /* ForKeyword */);
            var awaitToken = parseOptionalToken(121 /* AwaitKeyword */);
            parseExpected(19 /* OpenParenToken */);
            var initializer;
            if (token() !== 25 /* SemicolonToken */) {
                if (token() === 104 /* VarKeyword */ || token() === 110 /* LetKeyword */ || token() === 76 /* ConstKeyword */) {
                    initializer = parseVariableDeclarationList(/*inForStatementInitializer*/ true);
                }
                else {
                    initializer = disallowInAnd(parseExpression);
                }
            }
            var forOrForInOrForOfStatement;
            if (awaitToken ? parseExpected(145 /* OfKeyword */) : parseOptional(145 /* OfKeyword */)) {
                var forOfStatement = createNode(222 /* ForOfStatement */, pos);
                forOfStatement.awaitModifier = awaitToken;
                forOfStatement.initializer = initializer;
                forOfStatement.expression = allowInAnd(parseAssignmentExpressionOrHigher);
                parseExpected(20 /* CloseParenToken */);
                forOrForInOrForOfStatement = forOfStatement;
            }
            else if (parseOptional(92 /* InKeyword */)) {
                var forInStatement = createNode(221 /* ForInStatement */, pos);
                forInStatement.initializer = initializer;
                forInStatement.expression = allowInAnd(parseExpression);
                parseExpected(20 /* CloseParenToken */);
                forOrForInOrForOfStatement = forInStatement;
            }
            else {
                var forStatement = createNode(220 /* ForStatement */, pos);
                forStatement.initializer = initializer;
                parseExpected(25 /* SemicolonToken */);
                if (token() !== 25 /* SemicolonToken */ && token() !== 20 /* CloseParenToken */) {
                    forStatement.condition = allowInAnd(parseExpression);
                }
                parseExpected(25 /* SemicolonToken */);
                if (token() !== 20 /* CloseParenToken */) {
                    forStatement.incrementor = allowInAnd(parseExpression);
                }
                parseExpected(20 /* CloseParenToken */);
                forOrForInOrForOfStatement = forStatement;
            }
            forOrForInOrForOfStatement.statement = parseStatement();
            return finishNode(forOrForInOrForOfStatement);
        }
        function parseBreakOrContinueStatement(kind) {
            var node = createNode(kind);
            parseExpected(kind === 224 /* BreakStatement */ ? 72 /* BreakKeyword */ : 77 /* ContinueKeyword */);
            if (!canParseSemicolon()) {
                node.label = parseIdentifier();
            }
            parseSemicolon();
            return finishNode(node);
        }
        function parseReturnStatement() {
            var node = createNode(225 /* ReturnStatement */);
            parseExpected(96 /* ReturnKeyword */);
            if (!canParseSemicolon()) {
                node.expression = allowInAnd(parseExpression);
            }
            parseSemicolon();
            return finishNode(node);
        }
        function parseWithStatement() {
            var node = createNode(226 /* WithStatement */);
            parseExpected(107 /* WithKeyword */);
            parseExpected(19 /* OpenParenToken */);
            node.expression = allowInAnd(parseExpression);
            parseExpected(20 /* CloseParenToken */);
            node.statement = doInsideOfContext(8388608 /* InWithStatement */, parseStatement);
            return finishNode(node);
        }
        function parseCaseClause() {
            var node = createNode(266 /* CaseClause */);
            parseExpected(73 /* CaseKeyword */);
            node.expression = allowInAnd(parseExpression);
            parseExpected(56 /* ColonToken */);
            node.statements = parseList(3 /* SwitchClauseStatements */, parseStatement);
            return finishNode(node);
        }
        function parseDefaultClause() {
            var node = createNode(267 /* DefaultClause */);
            parseExpected(79 /* DefaultKeyword */);
            parseExpected(56 /* ColonToken */);
            node.statements = parseList(3 /* SwitchClauseStatements */, parseStatement);
            return finishNode(node);
        }
        function parseCaseOrDefaultClause() {
            return token() === 73 /* CaseKeyword */ ? parseCaseClause() : parseDefaultClause();
        }
        function parseSwitchStatement() {
            var node = createNode(227 /* SwitchStatement */);
            parseExpected(98 /* SwitchKeyword */);
            parseExpected(19 /* OpenParenToken */);
            node.expression = allowInAnd(parseExpression);
            parseExpected(20 /* CloseParenToken */);
            var caseBlock = createNode(241 /* CaseBlock */);
            parseExpected(17 /* OpenBraceToken */);
            caseBlock.clauses = parseList(2 /* SwitchClauses */, parseCaseOrDefaultClause);
            parseExpected(18 /* CloseBraceToken */);
            node.caseBlock = finishNode(caseBlock);
            return finishNode(node);
        }
        function parseThrowStatement() {
            // ThrowStatement[Yield] :
            //      throw [no LineTerminator here]Expression[In, ?Yield];
            // Because of automatic semicolon insertion, we need to report error if this
            // throw could be terminated with a semicolon.  Note: we can't call 'parseExpression'
            // directly as that might consume an expression on the following line.
            // We just return 'undefined' in that case.  The actual error will be reported in the
            // grammar walker.
            var node = createNode(229 /* ThrowStatement */);
            parseExpected(100 /* ThrowKeyword */);
            node.expression = scanner.hasPrecedingLineBreak() ? undefined : allowInAnd(parseExpression);
            parseSemicolon();
            return finishNode(node);
        }
        // TODO: Review for error recovery
        function parseTryStatement() {
            var node = createNode(230 /* TryStatement */);
            parseExpected(102 /* TryKeyword */);
            node.tryBlock = parseBlock(/*ignoreMissingOpenBrace*/ false);
            node.catchClause = token() === 74 /* CatchKeyword */ ? parseCatchClause() : undefined;
            // If we don't have a catch clause, then we must have a finally clause.  Try to parse
            // one out no matter what.
            if (!node.catchClause || token() === 87 /* FinallyKeyword */) {
                parseExpected(87 /* FinallyKeyword */);
                node.finallyBlock = parseBlock(/*ignoreMissingOpenBrace*/ false);
            }
            return finishNode(node);
        }
        function parseCatchClause() {
            var result = createNode(269 /* CatchClause */);
            parseExpected(74 /* CatchKeyword */);
            if (parseOptional(19 /* OpenParenToken */)) {
                result.variableDeclaration = parseVariableDeclaration();
                parseExpected(20 /* CloseParenToken */);
            }
            else {
                // Keep shape of node to avoid degrading performance.
                result.variableDeclaration = undefined;
            }
            result.block = parseBlock(/*ignoreMissingOpenBrace*/ false);
            return finishNode(result);
        }
        function parseDebuggerStatement() {
            var node = createNode(231 /* DebuggerStatement */);
            parseExpected(78 /* DebuggerKeyword */);
            parseSemicolon();
            return finishNode(node);
        }
        function parseExpressionOrLabeledStatement() {
            // Avoiding having to do the lookahead for a labeled statement by just trying to parse
            // out an expression, seeing if it is identifier and then seeing if it is followed by
            // a colon.
            var node = createNodeWithJSDoc(0 /* Unknown */);
            var expression = allowInAnd(parseExpression);
            if (expression.kind === 71 /* Identifier */ && parseOptional(56 /* ColonToken */)) {
                node.kind = 228 /* LabeledStatement */;
                node.label = expression;
                node.statement = parseStatement();
            }
            else {
                node.kind = 216 /* ExpressionStatement */;
                node.expression = expression;
                parseSemicolon();
            }
            return finishNode(node);
        }
        function nextTokenIsIdentifierOrKeywordOnSameLine() {
            nextToken();
            return ts.tokenIsIdentifierOrKeyword(token()) && !scanner.hasPrecedingLineBreak();
        }
        function nextTokenIsClassKeywordOnSameLine() {
            nextToken();
            return token() === 75 /* ClassKeyword */ && !scanner.hasPrecedingLineBreak();
        }
        function nextTokenIsFunctionKeywordOnSameLine() {
            nextToken();
            return token() === 89 /* FunctionKeyword */ && !scanner.hasPrecedingLineBreak();
        }
        function nextTokenIsIdentifierOrKeywordOrLiteralOnSameLine() {
            nextToken();
            return (ts.tokenIsIdentifierOrKeyword(token()) || token() === 8 /* NumericLiteral */ || token() === 9 /* StringLiteral */) && !scanner.hasPrecedingLineBreak();
        }
        function isDeclaration() {
            while (true) {
                switch (token()) {
                    case 104 /* VarKeyword */:
                    case 110 /* LetKeyword */:
                    case 76 /* ConstKeyword */:
                    case 89 /* FunctionKeyword */:
                    case 75 /* ClassKeyword */:
                    case 83 /* EnumKeyword */:
                        return true;
                    // 'declare', 'module', 'namespace', 'interface'* and 'type' are all legal JavaScript identifiers;
                    // however, an identifier cannot be followed by another identifier on the same line. This is what we
                    // count on to parse out the respective declarations. For instance, we exploit this to say that
                    //
                    //    namespace n
                    //
                    // can be none other than the beginning of a namespace declaration, but need to respect that JavaScript sees
                    //
                    //    namespace
                    //    n
                    //
                    // as the identifier 'namespace' on one line followed by the identifier 'n' on another.
                    // We need to look one token ahead to see if it permissible to try parsing a declaration.
                    //
                    // *Note*: 'interface' is actually a strict mode reserved word. So while
                    //
                    //   "use strict"
                    //   interface
                    //   I {}
                    //
                    // could be legal, it would add complexity for very little gain.
                    case 109 /* InterfaceKeyword */:
                    case 139 /* TypeKeyword */:
                        return nextTokenIsIdentifierOnSameLine();
                    case 129 /* ModuleKeyword */:
                    case 130 /* NamespaceKeyword */:
                        return nextTokenIsIdentifierOrStringLiteralOnSameLine();
                    case 117 /* AbstractKeyword */:
                    case 120 /* AsyncKeyword */:
                    case 124 /* DeclareKeyword */:
                    case 112 /* PrivateKeyword */:
                    case 113 /* ProtectedKeyword */:
                    case 114 /* PublicKeyword */:
                    case 132 /* ReadonlyKeyword */:
                        nextToken();
                        // ASI takes effect for this modifier.
                        if (scanner.hasPrecedingLineBreak()) {
                            return false;
                        }
                        continue;
                    case 144 /* GlobalKeyword */:
                        nextToken();
                        return token() === 17 /* OpenBraceToken */ || token() === 71 /* Identifier */ || token() === 84 /* ExportKeyword */;
                    case 91 /* ImportKeyword */:
                        nextToken();
                        return token() === 9 /* StringLiteral */ || token() === 39 /* AsteriskToken */ ||
                            token() === 17 /* OpenBraceToken */ || ts.tokenIsIdentifierOrKeyword(token());
                    case 84 /* ExportKeyword */:
                        nextToken();
                        if (token() === 58 /* EqualsToken */ || token() === 39 /* AsteriskToken */ ||
                            token() === 17 /* OpenBraceToken */ || token() === 79 /* DefaultKeyword */ ||
                            token() === 118 /* AsKeyword */) {
                            return true;
                        }
                        continue;
                    case 115 /* StaticKeyword */:
                        nextToken();
                        continue;
                    default:
                        return false;
                }
            }
        }
        function isStartOfDeclaration() {
            return lookAhead(isDeclaration);
        }
        function isStartOfStatement() {
            switch (token()) {
                case 57 /* AtToken */:
                case 25 /* SemicolonToken */:
                case 17 /* OpenBraceToken */:
                case 104 /* VarKeyword */:
                case 110 /* LetKeyword */:
                case 89 /* FunctionKeyword */:
                case 75 /* ClassKeyword */:
                case 83 /* EnumKeyword */:
                case 90 /* IfKeyword */:
                case 81 /* DoKeyword */:
                case 106 /* WhileKeyword */:
                case 88 /* ForKeyword */:
                case 77 /* ContinueKeyword */:
                case 72 /* BreakKeyword */:
                case 96 /* ReturnKeyword */:
                case 107 /* WithKeyword */:
                case 98 /* SwitchKeyword */:
                case 100 /* ThrowKeyword */:
                case 102 /* TryKeyword */:
                case 78 /* DebuggerKeyword */:
                // 'catch' and 'finally' do not actually indicate that the code is part of a statement,
                // however, we say they are here so that we may gracefully parse them and error later.
                case 74 /* CatchKeyword */:
                case 87 /* FinallyKeyword */:
                    return true;
                case 91 /* ImportKeyword */:
                    return isStartOfDeclaration() || lookAhead(nextTokenIsOpenParenOrLessThanOrDot);
                case 76 /* ConstKeyword */:
                case 84 /* ExportKeyword */:
                    return isStartOfDeclaration();
                case 120 /* AsyncKeyword */:
                case 124 /* DeclareKeyword */:
                case 109 /* InterfaceKeyword */:
                case 129 /* ModuleKeyword */:
                case 130 /* NamespaceKeyword */:
                case 139 /* TypeKeyword */:
                case 144 /* GlobalKeyword */:
                    // When these don't start a declaration, they're an identifier in an expression statement
                    return true;
                case 114 /* PublicKeyword */:
                case 112 /* PrivateKeyword */:
                case 113 /* ProtectedKeyword */:
                case 115 /* StaticKeyword */:
                case 132 /* ReadonlyKeyword */:
                    // When these don't start a declaration, they may be the start of a class member if an identifier
                    // immediately follows. Otherwise they're an identifier in an expression statement.
                    return isStartOfDeclaration() || !lookAhead(nextTokenIsIdentifierOrKeywordOnSameLine);
                default:
                    return isStartOfExpression();
            }
        }
        function nextTokenIsIdentifierOrStartOfDestructuring() {
            nextToken();
            return isIdentifier() || token() === 17 /* OpenBraceToken */ || token() === 21 /* OpenBracketToken */;
        }
        function isLetDeclaration() {
            // In ES6 'let' always starts a lexical declaration if followed by an identifier or {
            // or [.
            return lookAhead(nextTokenIsIdentifierOrStartOfDestructuring);
        }
        function parseStatement() {
            switch (token()) {
                case 25 /* SemicolonToken */:
                    return parseEmptyStatement();
                case 17 /* OpenBraceToken */:
                    return parseBlock(/*ignoreMissingOpenBrace*/ false);
                case 104 /* VarKeyword */:
                    return parseVariableStatement(createNodeWithJSDoc(232 /* VariableDeclaration */));
                case 110 /* LetKeyword */:
                    if (isLetDeclaration()) {
                        return parseVariableStatement(createNodeWithJSDoc(232 /* VariableDeclaration */));
                    }
                    break;
                case 89 /* FunctionKeyword */:
                    return parseFunctionDeclaration(createNodeWithJSDoc(234 /* FunctionDeclaration */));
                case 75 /* ClassKeyword */:
                    return parseClassDeclaration(createNodeWithJSDoc(235 /* ClassDeclaration */));
                case 90 /* IfKeyword */:
                    return parseIfStatement();
                case 81 /* DoKeyword */:
                    return parseDoStatement();
                case 106 /* WhileKeyword */:
                    return parseWhileStatement();
                case 88 /* ForKeyword */:
                    return parseForOrForInOrForOfStatement();
                case 77 /* ContinueKeyword */:
                    return parseBreakOrContinueStatement(223 /* ContinueStatement */);
                case 72 /* BreakKeyword */:
                    return parseBreakOrContinueStatement(224 /* BreakStatement */);
                case 96 /* ReturnKeyword */:
                    return parseReturnStatement();
                case 107 /* WithKeyword */:
                    return parseWithStatement();
                case 98 /* SwitchKeyword */:
                    return parseSwitchStatement();
                case 100 /* ThrowKeyword */:
                    return parseThrowStatement();
                case 102 /* TryKeyword */:
                // Include 'catch' and 'finally' for error recovery.
                case 74 /* CatchKeyword */:
                case 87 /* FinallyKeyword */:
                    return parseTryStatement();
                case 78 /* DebuggerKeyword */:
                    return parseDebuggerStatement();
                case 57 /* AtToken */:
                    return parseDeclaration();
                case 120 /* AsyncKeyword */:
                case 109 /* InterfaceKeyword */:
                case 139 /* TypeKeyword */:
                case 129 /* ModuleKeyword */:
                case 130 /* NamespaceKeyword */:
                case 124 /* DeclareKeyword */:
                case 76 /* ConstKeyword */:
                case 83 /* EnumKeyword */:
                case 84 /* ExportKeyword */:
                case 91 /* ImportKeyword */:
                case 112 /* PrivateKeyword */:
                case 113 /* ProtectedKeyword */:
                case 114 /* PublicKeyword */:
                case 117 /* AbstractKeyword */:
                case 115 /* StaticKeyword */:
                case 132 /* ReadonlyKeyword */:
                case 144 /* GlobalKeyword */:
                    if (isStartOfDeclaration()) {
                        return parseDeclaration();
                    }
                    break;
            }
            return parseExpressionOrLabeledStatement();
        }
        function isDeclareModifier(modifier) {
            return modifier.kind === 124 /* DeclareKeyword */;
        }
        function parseDeclaration() {
            var node = createNodeWithJSDoc(0 /* Unknown */);
            node.decorators = parseDecorators();
            node.modifiers = parseModifiers();
            if (ts.some(node.modifiers, isDeclareModifier)) {
                for (var _i = 0, _a = node.modifiers; _i < _a.length; _i++) {
                    var m = _a[_i];
                    m.flags |= 4194304 /* Ambient */;
                }
                return doInsideOfContext(4194304 /* Ambient */, function () { return parseDeclarationWorker(node); });
            }
            else {
                return parseDeclarationWorker(node);
            }
        }
        function parseDeclarationWorker(node) {
            switch (token()) {
                case 104 /* VarKeyword */:
                case 110 /* LetKeyword */:
                case 76 /* ConstKeyword */:
                    return parseVariableStatement(node);
                case 89 /* FunctionKeyword */:
                    return parseFunctionDeclaration(node);
                case 75 /* ClassKeyword */:
                    return parseClassDeclaration(node);
                case 109 /* InterfaceKeyword */:
                    return parseInterfaceDeclaration(node);
                case 139 /* TypeKeyword */:
                    return parseTypeAliasDeclaration(node);
                case 83 /* EnumKeyword */:
                    return parseEnumDeclaration(node);
                case 144 /* GlobalKeyword */:
                case 129 /* ModuleKeyword */:
                case 130 /* NamespaceKeyword */:
                    return parseModuleDeclaration(node);
                case 91 /* ImportKeyword */:
                    return parseImportDeclarationOrImportEqualsDeclaration(node);
                case 84 /* ExportKeyword */:
                    nextToken();
                    switch (token()) {
                        case 79 /* DefaultKeyword */:
                        case 58 /* EqualsToken */:
                            return parseExportAssignment(node);
                        case 118 /* AsKeyword */:
                            return parseNamespaceExportDeclaration(node);
                        default:
                            return parseExportDeclaration(node);
                    }
                default:
                    if (node.decorators || node.modifiers) {
                        // We reached this point because we encountered decorators and/or modifiers and assumed a declaration
                        // would follow. For recovery and error reporting purposes, return an incomplete declaration.
                        var missing = createMissingNode(253 /* MissingDeclaration */, /*reportAtCurrentPosition*/ true, ts.Diagnostics.Declaration_expected);
                        missing.pos = node.pos;
                        missing.decorators = node.decorators;
                        missing.modifiers = node.modifiers;
                        return finishNode(missing);
                    }
                    return undefined; // TODO: GH#18217
            }
        }
        function nextTokenIsIdentifierOrStringLiteralOnSameLine() {
            nextToken();
            return !scanner.hasPrecedingLineBreak() && (isIdentifier() || token() === 9 /* StringLiteral */);
        }
        function parseFunctionBlockOrSemicolon(flags, diagnosticMessage) {
            if (token() !== 17 /* OpenBraceToken */ && canParseSemicolon()) {
                parseSemicolon();
                return;
            }
            return parseFunctionBlock(flags, diagnosticMessage);
        }
        // DECLARATIONS
        function parseArrayBindingElement() {
            if (token() === 26 /* CommaToken */) {
                return createNode(206 /* OmittedExpression */);
            }
            var node = createNode(182 /* BindingElement */);
            node.dotDotDotToken = parseOptionalToken(24 /* DotDotDotToken */);
            node.name = parseIdentifierOrPattern();
            node.initializer = parseInitializer();
            return finishNode(node);
        }
        function parseObjectBindingElement() {
            var node = createNode(182 /* BindingElement */);
            node.dotDotDotToken = parseOptionalToken(24 /* DotDotDotToken */);
            var tokenIsIdentifier = isIdentifier();
            var propertyName = parsePropertyName();
            if (tokenIsIdentifier && token() !== 56 /* ColonToken */) {
                node.name = propertyName;
            }
            else {
                parseExpected(56 /* ColonToken */);
                node.propertyName = propertyName;
                node.name = parseIdentifierOrPattern();
            }
            node.initializer = parseInitializer();
            return finishNode(node);
        }
        function parseObjectBindingPattern() {
            var node = createNode(180 /* ObjectBindingPattern */);
            parseExpected(17 /* OpenBraceToken */);
            node.elements = parseDelimitedList(9 /* ObjectBindingElements */, parseObjectBindingElement);
            parseExpected(18 /* CloseBraceToken */);
            return finishNode(node);
        }
        function parseArrayBindingPattern() {
            var node = createNode(181 /* ArrayBindingPattern */);
            parseExpected(21 /* OpenBracketToken */);
            node.elements = parseDelimitedList(10 /* ArrayBindingElements */, parseArrayBindingElement);
            parseExpected(22 /* CloseBracketToken */);
            return finishNode(node);
        }
        function isIdentifierOrPattern() {
            return token() === 17 /* OpenBraceToken */ || token() === 21 /* OpenBracketToken */ || isIdentifier();
        }
        function parseIdentifierOrPattern() {
            if (token() === 21 /* OpenBracketToken */) {
                return parseArrayBindingPattern();
            }
            if (token() === 17 /* OpenBraceToken */) {
                return parseObjectBindingPattern();
            }
            return parseIdentifier();
        }
        function parseVariableDeclarationAllowExclamation() {
            return parseVariableDeclaration(/*allowExclamation*/ true);
        }
        function parseVariableDeclaration(allowExclamation) {
            var node = createNode(232 /* VariableDeclaration */);
            node.name = parseIdentifierOrPattern();
            if (allowExclamation && node.name.kind === 71 /* Identifier */ &&
                token() === 51 /* ExclamationToken */ && !scanner.hasPrecedingLineBreak()) {
                node.exclamationToken = parseTokenNode();
            }
            node.type = parseTypeAnnotation();
            if (!isInOrOfKeyword(token())) {
                node.initializer = parseInitializer();
            }
            return finishNode(node);
        }
        function parseVariableDeclarationList(inForStatementInitializer) {
            var node = createNode(233 /* VariableDeclarationList */);
            switch (token()) {
                case 104 /* VarKeyword */:
                    break;
                case 110 /* LetKeyword */:
                    node.flags |= 1 /* Let */;
                    break;
                case 76 /* ConstKeyword */:
                    node.flags |= 2 /* Const */;
                    break;
                default:
                    ts.Debug.fail();
            }
            nextToken();
            // The user may have written the following:
            //
            //    for (let of X) { }
            //
            // In this case, we want to parse an empty declaration list, and then parse 'of'
            // as a keyword. The reason this is not automatic is that 'of' is a valid identifier.
            // So we need to look ahead to determine if 'of' should be treated as a keyword in
            // this context.
            // The checker will then give an error that there is an empty declaration list.
            if (token() === 145 /* OfKeyword */ && lookAhead(canFollowContextualOfKeyword)) {
                node.declarations = createMissingList();
            }
            else {
                var savedDisallowIn = inDisallowInContext();
                setDisallowInContext(inForStatementInitializer);
                node.declarations = parseDelimitedList(8 /* VariableDeclarations */, inForStatementInitializer ? parseVariableDeclaration : parseVariableDeclarationAllowExclamation);
                setDisallowInContext(savedDisallowIn);
            }
            return finishNode(node);
        }
        function canFollowContextualOfKeyword() {
            return nextTokenIsIdentifier() && nextToken() === 20 /* CloseParenToken */;
        }
        function parseVariableStatement(node) {
            node.kind = 214 /* VariableStatement */;
            node.declarationList = parseVariableDeclarationList(/*inForStatementInitializer*/ false);
            parseSemicolon();
            return finishNode(node);
        }
        function parseFunctionDeclaration(node) {
            node.kind = 234 /* FunctionDeclaration */;
            parseExpected(89 /* FunctionKeyword */);
            node.asteriskToken = parseOptionalToken(39 /* AsteriskToken */);
            node.name = ts.hasModifier(node, 512 /* Default */) ? parseOptionalIdentifier() : parseIdentifier();
            var isGenerator = node.asteriskToken ? 1 /* Yield */ : 0 /* None */;
            var isAsync = ts.hasModifier(node, 256 /* Async */) ? 2 /* Await */ : 0 /* None */;
            fillSignature(56 /* ColonToken */, isGenerator | isAsync, node);
            node.body = parseFunctionBlockOrSemicolon(isGenerator | isAsync, ts.Diagnostics.or_expected);
            return finishNode(node);
        }
        function parseConstructorDeclaration(node) {
            node.kind = 155 /* Constructor */;
            parseExpected(123 /* ConstructorKeyword */);
            fillSignature(56 /* ColonToken */, 0 /* None */, node);
            node.body = parseFunctionBlockOrSemicolon(0 /* None */, ts.Diagnostics.or_expected);
            return finishNode(node);
        }
        function parseMethodDeclaration(node, asteriskToken, diagnosticMessage) {
            node.kind = 154 /* MethodDeclaration */;
            node.asteriskToken = asteriskToken;
            var isGenerator = asteriskToken ? 1 /* Yield */ : 0 /* None */;
            var isAsync = ts.hasModifier(node, 256 /* Async */) ? 2 /* Await */ : 0 /* None */;
            fillSignature(56 /* ColonToken */, isGenerator | isAsync, node);
            node.body = parseFunctionBlockOrSemicolon(isGenerator | isAsync, diagnosticMessage);
            return finishNode(node);
        }
        function parsePropertyDeclaration(node) {
            node.kind = 152 /* PropertyDeclaration */;
            if (!node.questionToken && token() === 51 /* ExclamationToken */ && !scanner.hasPrecedingLineBreak()) {
                node.exclamationToken = parseTokenNode();
            }
            node.type = parseTypeAnnotation();
            // For instance properties specifically, since they are evaluated inside the constructor,
            // we do *not * want to parse yield expressions, so we specifically turn the yield context
            // off. The grammar would look something like this:
            //
            //    MemberVariableDeclaration[Yield]:
            //        AccessibilityModifier_opt PropertyName TypeAnnotation_opt Initializer_opt[In];
            //        AccessibilityModifier_opt static_opt PropertyName TypeAnnotation_opt Initializer_opt[In, ?Yield];
            //
            // The checker may still error in the static case to explicitly disallow the yield expression.
            node.initializer = ts.hasModifier(node, 32 /* Static */)
                ? allowInAnd(parseInitializer)
                : doOutsideOfContext(4096 /* YieldContext */ | 2048 /* DisallowInContext */, parseInitializer);
            parseSemicolon();
            return finishNode(node);
        }
        function parsePropertyOrMethodDeclaration(node) {
            var asteriskToken = parseOptionalToken(39 /* AsteriskToken */);
            node.name = parsePropertyName();
            // Note: this is not legal as per the grammar.  But we allow it in the parser and
            // report an error in the grammar checker.
            node.questionToken = parseOptionalToken(55 /* QuestionToken */);
            if (asteriskToken || token() === 19 /* OpenParenToken */ || token() === 27 /* LessThanToken */) {
                return parseMethodDeclaration(node, asteriskToken, ts.Diagnostics.or_expected);
            }
            return parsePropertyDeclaration(node);
        }
        function parseAccessorDeclaration(node, kind) {
            node.kind = kind;
            node.name = parsePropertyName();
            fillSignature(56 /* ColonToken */, 0 /* None */, node);
            node.body = parseFunctionBlockOrSemicolon(0 /* None */);
            return finishNode(node);
        }
        function isClassMemberStart() {
            var idToken;
            if (token() === 57 /* AtToken */) {
                return true;
            }
            // Eat up all modifiers, but hold on to the last one in case it is actually an identifier.
            while (ts.isModifierKind(token())) {
                idToken = token();
                // If the idToken is a class modifier (protected, private, public, and static), it is
                // certain that we are starting to parse class member. This allows better error recovery
                // Example:
                //      public foo() ...     // true
                //      public @dec blah ... // true; we will then report an error later
                //      export public ...    // true; we will then report an error later
                if (ts.isClassMemberModifier(idToken)) {
                    return true;
                }
                nextToken();
            }
            if (token() === 39 /* AsteriskToken */) {
                return true;
            }
            // Try to get the first property-like token following all modifiers.
            // This can either be an identifier or the 'get' or 'set' keywords.
            if (isLiteralPropertyName()) {
                idToken = token();
                nextToken();
            }
            // Index signatures and computed properties are class members; we can parse.
            if (token() === 21 /* OpenBracketToken */) {
                return true;
            }
            // If we were able to get any potential identifier...
            if (idToken !== undefined) {
                // If we have a non-keyword identifier, or if we have an accessor, then it's safe to parse.
                if (!ts.isKeyword(idToken) || idToken === 136 /* SetKeyword */ || idToken === 125 /* GetKeyword */) {
                    return true;
                }
                // If it *is* a keyword, but not an accessor, check a little farther along
                // to see if it should actually be parsed as a class member.
                switch (token()) {
                    case 19 /* OpenParenToken */: // Method declaration
                    case 27 /* LessThanToken */: // Generic Method declaration
                    case 51 /* ExclamationToken */: // Non-null assertion on property name
                    case 56 /* ColonToken */: // Type Annotation for declaration
                    case 58 /* EqualsToken */: // Initializer for declaration
                    case 55 /* QuestionToken */: // Not valid, but permitted so that it gets caught later on.
                        return true;
                    default:
                        // Covers
                        //  - Semicolons     (declaration termination)
                        //  - Closing braces (end-of-class, must be declaration)
                        //  - End-of-files   (not valid, but permitted so that it gets caught later on)
                        //  - Line-breaks    (enabling *automatic semicolon insertion*)
                        return canParseSemicolon();
                }
            }
            return false;
        }
        function parseDecorators() {
            var list;
            var listPos = getNodePos();
            while (true) {
                var decoratorStart = getNodePos();
                if (!parseOptional(57 /* AtToken */)) {
                    break;
                }
                var decorator = createNode(150 /* Decorator */, decoratorStart);
                decorator.expression = doInDecoratorContext(parseLeftHandSideExpressionOrHigher);
                finishNode(decorator);
                (list || (list = [])).push(decorator);
            }
            return list && createNodeArray(list, listPos);
        }
        /*
         * There are situations in which a modifier like 'const' will appear unexpectedly, such as on a class member.
         * In those situations, if we are entirely sure that 'const' is not valid on its own (such as when ASI takes effect
         * and turns it into a standalone declaration), then it is better to parse it and report an error later.
         *
         * In such situations, 'permitInvalidConstAsModifier' should be set to true.
         */
        function parseModifiers(permitInvalidConstAsModifier) {
            var list;
            var listPos = getNodePos();
            while (true) {
                var modifierStart = scanner.getStartPos();
                var modifierKind = token();
                if (token() === 76 /* ConstKeyword */ && permitInvalidConstAsModifier) {
                    // We need to ensure that any subsequent modifiers appear on the same line
                    // so that when 'const' is a standalone declaration, we don't issue an error.
                    if (!tryParse(nextTokenIsOnSameLineAndCanFollowModifier)) {
                        break;
                    }
                }
                else {
                    if (!parseAnyContextualModifier()) {
                        break;
                    }
                }
                var modifier = finishNode(createNode(modifierKind, modifierStart));
                (list || (list = [])).push(modifier);
            }
            return list && createNodeArray(list, listPos);
        }
        function parseModifiersForArrowFunction() {
            var modifiers;
            if (token() === 120 /* AsyncKeyword */) {
                var modifierStart = scanner.getStartPos();
                var modifierKind = token();
                nextToken();
                var modifier = finishNode(createNode(modifierKind, modifierStart));
                modifiers = createNodeArray([modifier], modifierStart);
            }
            return modifiers;
        }
        function parseClassElement() {
            if (token() === 25 /* SemicolonToken */) {
                var result = createNode(212 /* SemicolonClassElement */);
                nextToken();
                return finishNode(result);
            }
            var node = createNodeWithJSDoc(0 /* Unknown */);
            node.decorators = parseDecorators();
            node.modifiers = parseModifiers(/*permitInvalidConstAsModifier*/ true);
            if (parseContextualModifier(125 /* GetKeyword */)) {
                return parseAccessorDeclaration(node, 156 /* GetAccessor */);
            }
            if (parseContextualModifier(136 /* SetKeyword */)) {
                return parseAccessorDeclaration(node, 157 /* SetAccessor */);
            }
            if (token() === 123 /* ConstructorKeyword */) {
                return parseConstructorDeclaration(node);
            }
            if (isIndexSignature()) {
                return parseIndexSignatureDeclaration(node);
            }
            // It is very important that we check this *after* checking indexers because
            // the [ token can start an index signature or a computed property name
            if (ts.tokenIsIdentifierOrKeyword(token()) ||
                token() === 9 /* StringLiteral */ ||
                token() === 8 /* NumericLiteral */ ||
                token() === 39 /* AsteriskToken */ ||
                token() === 21 /* OpenBracketToken */) {
                return parsePropertyOrMethodDeclaration(node);
            }
            if (node.decorators || node.modifiers) {
                // treat this as a property declaration with a missing name.
                node.name = createMissingNode(71 /* Identifier */, /*reportAtCurrentPosition*/ true, ts.Diagnostics.Declaration_expected);
                return parsePropertyDeclaration(node);
            }
            // 'isClassMemberStart' should have hinted not to attempt parsing.
            return ts.Debug.fail("Should not have attempted to parse class member declaration.");
        }
        function parseClassExpression() {
            return parseClassDeclarationOrExpression(createNodeWithJSDoc(0 /* Unknown */), 205 /* ClassExpression */);
        }
        function parseClassDeclaration(node) {
            return parseClassDeclarationOrExpression(node, 235 /* ClassDeclaration */);
        }
        function parseClassDeclarationOrExpression(node, kind) {
            node.kind = kind;
            parseExpected(75 /* ClassKeyword */);
            node.name = parseNameOfClassDeclarationOrExpression();
            node.typeParameters = parseTypeParameters();
            node.heritageClauses = parseHeritageClauses();
            if (parseExpected(17 /* OpenBraceToken */)) {
                // ClassTail[Yield,Await] : (Modified) See 14.5
                //      ClassHeritage[?Yield,?Await]opt { ClassBody[?Yield,?Await]opt }
                node.members = parseClassMembers();
                parseExpected(18 /* CloseBraceToken */);
            }
            else {
                node.members = createMissingList();
            }
            return finishNode(node);
        }
        function parseNameOfClassDeclarationOrExpression() {
            // implements is a future reserved word so
            // 'class implements' might mean either
            // - class expression with omitted name, 'implements' starts heritage clause
            // - class with name 'implements'
            // 'isImplementsClause' helps to disambiguate between these two cases
            return isIdentifier() && !isImplementsClause()
                ? parseIdentifier()
                : undefined;
        }
        function isImplementsClause() {
            return token() === 108 /* ImplementsKeyword */ && lookAhead(nextTokenIsIdentifierOrKeyword);
        }
        function parseHeritageClauses() {
            // ClassTail[Yield,Await] : (Modified) See 14.5
            //      ClassHeritage[?Yield,?Await]opt { ClassBody[?Yield,?Await]opt }
            if (isHeritageClause()) {
                return parseList(21 /* HeritageClauses */, parseHeritageClause);
            }
            return undefined;
        }
        function parseHeritageClause() {
            var tok = token();
            ts.Debug.assert(tok === 85 /* ExtendsKeyword */ || tok === 108 /* ImplementsKeyword */); // isListElement() should ensure this.
            var node = createNode(268 /* HeritageClause */);
            node.token = tok;
            nextToken();
            node.types = parseDelimitedList(7 /* HeritageClauseElement */, parseExpressionWithTypeArguments);
            return finishNode(node);
        }
        function parseExpressionWithTypeArguments() {
            var node = createNode(207 /* ExpressionWithTypeArguments */);
            node.expression = parseLeftHandSideExpressionOrHigher();
            node.typeArguments = tryParseTypeArguments();
            return finishNode(node);
        }
        function tryParseTypeArguments() {
            return token() === 27 /* LessThanToken */
                ? parseBracketedList(19 /* TypeArguments */, parseType, 27 /* LessThanToken */, 29 /* GreaterThanToken */)
                : undefined;
        }
        function isHeritageClause() {
            return token() === 85 /* ExtendsKeyword */ || token() === 108 /* ImplementsKeyword */;
        }
        function parseClassMembers() {
            return parseList(5 /* ClassMembers */, parseClassElement);
        }
        function parseInterfaceDeclaration(node) {
            node.kind = 236 /* InterfaceDeclaration */;
            parseExpected(109 /* InterfaceKeyword */);
            node.name = parseIdentifier();
            node.typeParameters = parseTypeParameters();
            node.heritageClauses = parseHeritageClauses();
            node.members = parseObjectTypeMembers();
            return finishNode(node);
        }
        function parseTypeAliasDeclaration(node) {
            node.kind = 237 /* TypeAliasDeclaration */;
            parseExpected(139 /* TypeKeyword */);
            node.name = parseIdentifier();
            node.typeParameters = parseTypeParameters();
            parseExpected(58 /* EqualsToken */);
            node.type = parseType();
            parseSemicolon();
            return finishNode(node);
        }
        // In an ambient declaration, the grammar only allows integer literals as initializers.
        // In a non-ambient declaration, the grammar allows uninitialized members only in a
        // ConstantEnumMemberSection, which starts at the beginning of an enum declaration
        // or any time an integer literal initializer is encountered.
        function parseEnumMember() {
            var node = createNodeWithJSDoc(273 /* EnumMember */);
            node.name = parsePropertyName();
            node.initializer = allowInAnd(parseInitializer);
            return finishNode(node);
        }
        function parseEnumDeclaration(node) {
            node.kind = 238 /* EnumDeclaration */;
            parseExpected(83 /* EnumKeyword */);
            node.name = parseIdentifier();
            if (parseExpected(17 /* OpenBraceToken */)) {
                node.members = parseDelimitedList(6 /* EnumMembers */, parseEnumMember);
                parseExpected(18 /* CloseBraceToken */);
            }
            else {
                node.members = createMissingList();
            }
            return finishNode(node);
        }
        function parseModuleBlock() {
            var node = createNode(240 /* ModuleBlock */);
            if (parseExpected(17 /* OpenBraceToken */)) {
                node.statements = parseList(1 /* BlockStatements */, parseStatement);
                parseExpected(18 /* CloseBraceToken */);
            }
            else {
                node.statements = createMissingList();
            }
            return finishNode(node);
        }
        function parseModuleOrNamespaceDeclaration(node, flags) {
            node.kind = 239 /* ModuleDeclaration */;
            // If we are parsing a dotted namespace name, we want to
            // propagate the 'Namespace' flag across the names if set.
            var namespaceFlag = flags & 16 /* Namespace */;
            node.flags |= flags;
            node.name = parseIdentifier();
            node.body = parseOptional(23 /* DotToken */)
                ? parseModuleOrNamespaceDeclaration(createNode(0 /* Unknown */), 4 /* NestedNamespace */ | namespaceFlag)
                : parseModuleBlock();
            return finishNode(node);
        }
        function parseAmbientExternalModuleDeclaration(node) {
            node.kind = 239 /* ModuleDeclaration */;
            if (token() === 144 /* GlobalKeyword */) {
                // parse 'global' as name of global scope augmentation
                node.name = parseIdentifier();
                node.flags |= 512 /* GlobalAugmentation */;
            }
            else {
                node.name = parseLiteralNode();
                node.name.text = internIdentifier(node.name.text);
            }
            if (token() === 17 /* OpenBraceToken */) {
                node.body = parseModuleBlock();
            }
            else {
                parseSemicolon();
            }
            return finishNode(node);
        }
        function parseModuleDeclaration(node) {
            var flags = 0;
            if (token() === 144 /* GlobalKeyword */) {
                // global augmentation
                return parseAmbientExternalModuleDeclaration(node);
            }
            else if (parseOptional(130 /* NamespaceKeyword */)) {
                flags |= 16 /* Namespace */;
            }
            else {
                parseExpected(129 /* ModuleKeyword */);
                if (token() === 9 /* StringLiteral */) {
                    return parseAmbientExternalModuleDeclaration(node);
                }
            }
            return parseModuleOrNamespaceDeclaration(node, flags);
        }
        function isExternalModuleReference() {
            return token() === 133 /* RequireKeyword */ &&
                lookAhead(nextTokenIsOpenParen);
        }
        function nextTokenIsOpenParen() {
            return nextToken() === 19 /* OpenParenToken */;
        }
        function nextTokenIsSlash() {
            return nextToken() === 41 /* SlashToken */;
        }
        function parseNamespaceExportDeclaration(node) {
            node.kind = 242 /* NamespaceExportDeclaration */;
            parseExpected(118 /* AsKeyword */);
            parseExpected(130 /* NamespaceKeyword */);
            node.name = parseIdentifier();
            parseSemicolon();
            return finishNode(node);
        }
        function parseImportDeclarationOrImportEqualsDeclaration(node) {
            parseExpected(91 /* ImportKeyword */);
            var afterImportPos = scanner.getStartPos();
            var identifier;
            if (isIdentifier()) {
                identifier = parseIdentifier();
                if (token() !== 26 /* CommaToken */ && token() !== 143 /* FromKeyword */) {
                    return parseImportEqualsDeclaration(node, identifier);
                }
            }
            // Import statement
            node.kind = 244 /* ImportDeclaration */;
            // ImportDeclaration:
            //  import ImportClause from ModuleSpecifier ;
            //  import ModuleSpecifier;
            if (identifier || // import id
                token() === 39 /* AsteriskToken */ || // import *
                token() === 17 /* OpenBraceToken */) { // import {
                node.importClause = parseImportClause(identifier, afterImportPos);
                parseExpected(143 /* FromKeyword */);
            }
            node.moduleSpecifier = parseModuleSpecifier();
            parseSemicolon();
            return finishNode(node);
        }
        function parseImportEqualsDeclaration(node, identifier) {
            node.kind = 243 /* ImportEqualsDeclaration */;
            node.name = identifier;
            parseExpected(58 /* EqualsToken */);
            node.moduleReference = parseModuleReference();
            parseSemicolon();
            return finishNode(node);
        }
        function parseImportClause(identifier, fullStart) {
            // ImportClause:
            //  ImportedDefaultBinding
            //  NameSpaceImport
            //  NamedImports
            //  ImportedDefaultBinding, NameSpaceImport
            //  ImportedDefaultBinding, NamedImports
            var importClause = createNode(245 /* ImportClause */, fullStart);
            if (identifier) {
                // ImportedDefaultBinding:
                //  ImportedBinding
                importClause.name = identifier;
            }
            // If there was no default import or if there is comma token after default import
            // parse namespace or named imports
            if (!importClause.name ||
                parseOptional(26 /* CommaToken */)) {
                importClause.namedBindings = token() === 39 /* AsteriskToken */ ? parseNamespaceImport() : parseNamedImportsOrExports(247 /* NamedImports */);
            }
            return finishNode(importClause);
        }
        function parseModuleReference() {
            return isExternalModuleReference()
                ? parseExternalModuleReference()
                : parseEntityName(/*allowReservedWords*/ false);
        }
        function parseExternalModuleReference() {
            var node = createNode(254 /* ExternalModuleReference */);
            parseExpected(133 /* RequireKeyword */);
            parseExpected(19 /* OpenParenToken */);
            node.expression = parseModuleSpecifier();
            parseExpected(20 /* CloseParenToken */);
            return finishNode(node);
        }
        function parseModuleSpecifier() {
            if (token() === 9 /* StringLiteral */) {
                var result = parseLiteralNode();
                result.text = internIdentifier(result.text);
                return result;
            }
            else {
                // We allow arbitrary expressions here, even though the grammar only allows string
                // literals.  We check to ensure that it is only a string literal later in the grammar
                // check pass.
                return parseExpression();
            }
        }
        function parseNamespaceImport() {
            // NameSpaceImport:
            //  * as ImportedBinding
            var namespaceImport = createNode(246 /* NamespaceImport */);
            parseExpected(39 /* AsteriskToken */);
            parseExpected(118 /* AsKeyword */);
            namespaceImport.name = parseIdentifier();
            return finishNode(namespaceImport);
        }
        function parseNamedImportsOrExports(kind) {
            var node = createNode(kind);
            // NamedImports:
            //  { }
            //  { ImportsList }
            //  { ImportsList, }
            // ImportsList:
            //  ImportSpecifier
            //  ImportsList, ImportSpecifier
            node.elements = parseBracketedList(22 /* ImportOrExportSpecifiers */, kind === 247 /* NamedImports */ ? parseImportSpecifier : parseExportSpecifier, 17 /* OpenBraceToken */, 18 /* CloseBraceToken */);
            return finishNode(node);
        }
        function parseExportSpecifier() {
            return parseImportOrExportSpecifier(252 /* ExportSpecifier */);
        }
        function parseImportSpecifier() {
            return parseImportOrExportSpecifier(248 /* ImportSpecifier */);
        }
        function parseImportOrExportSpecifier(kind) {
            var node = createNode(kind);
            // ImportSpecifier:
            //   BindingIdentifier
            //   IdentifierName as BindingIdentifier
            // ExportSpecifier:
            //   IdentifierName
            //   IdentifierName as IdentifierName
            var checkIdentifierIsKeyword = ts.isKeyword(token()) && !isIdentifier();
            var checkIdentifierStart = scanner.getTokenPos();
            var checkIdentifierEnd = scanner.getTextPos();
            var identifierName = parseIdentifierName();
            if (token() === 118 /* AsKeyword */) {
                node.propertyName = identifierName;
                parseExpected(118 /* AsKeyword */);
                checkIdentifierIsKeyword = ts.isKeyword(token()) && !isIdentifier();
                checkIdentifierStart = scanner.getTokenPos();
                checkIdentifierEnd = scanner.getTextPos();
                node.name = parseIdentifierName();
            }
            else {
                node.name = identifierName;
            }
            if (kind === 248 /* ImportSpecifier */ && checkIdentifierIsKeyword) {
                parseErrorAt(checkIdentifierStart, checkIdentifierEnd, ts.Diagnostics.Identifier_expected);
            }
            return finishNode(node);
        }
        function parseExportDeclaration(node) {
            node.kind = 250 /* ExportDeclaration */;
            if (parseOptional(39 /* AsteriskToken */)) {
                parseExpected(143 /* FromKeyword */);
                node.moduleSpecifier = parseModuleSpecifier();
            }
            else {
                node.exportClause = parseNamedImportsOrExports(251 /* NamedExports */);
                // It is not uncommon to accidentally omit the 'from' keyword. Additionally, in editing scenarios,
                // the 'from' keyword can be parsed as a named export when the export clause is unterminated (i.e. `export { from "moduleName";`)
                // If we don't have a 'from' keyword, see if we have a string literal such that ASI won't take effect.
                if (token() === 143 /* FromKeyword */ || (token() === 9 /* StringLiteral */ && !scanner.hasPrecedingLineBreak())) {
                    parseExpected(143 /* FromKeyword */);
                    node.moduleSpecifier = parseModuleSpecifier();
                }
            }
            parseSemicolon();
            return finishNode(node);
        }
        function parseExportAssignment(node) {
            node.kind = 249 /* ExportAssignment */;
            if (parseOptional(58 /* EqualsToken */)) {
                node.isExportEquals = true;
            }
            else {
                parseExpected(79 /* DefaultKeyword */);
            }
            node.expression = parseAssignmentExpressionOrHigher();
            parseSemicolon();
            return finishNode(node);
        }
        function setExternalModuleIndicator(sourceFile) {
            // Try to use the first top-level import/export when available, then
            // fall back to looking for an 'import.meta' somewhere in the tree if necessary.
            sourceFile.externalModuleIndicator =
                ts.forEach(sourceFile.statements, isAnExternalModuleIndicatorNode) ||
                    getImportMetaIfNecessary(sourceFile);
        }
        function isAnExternalModuleIndicatorNode(node) {
            return ts.hasModifier(node, 1 /* Export */)
                || node.kind === 243 /* ImportEqualsDeclaration */ && node.moduleReference.kind === 254 /* ExternalModuleReference */
                || node.kind === 244 /* ImportDeclaration */
                || node.kind === 249 /* ExportAssignment */
                || node.kind === 250 /* ExportDeclaration */
                ? node
                : undefined;
        }
        function getImportMetaIfNecessary(sourceFile) {
            return sourceFile.flags & 1048576 /* PossiblyContainsImportMeta */ ?
                walkTreeForExternalModuleIndicators(sourceFile) :
                undefined;
        }
        function walkTreeForExternalModuleIndicators(node) {
            return isImportMeta(node) ? node : forEachChild(node, walkTreeForExternalModuleIndicators);
        }
        function isImportMeta(node) {
            return ts.isMetaProperty(node) && node.keywordToken === 91 /* ImportKeyword */ && node.name.escapedText === "meta";
        }
        var ParsingContext;
        (function (ParsingContext) {
            ParsingContext[ParsingContext["SourceElements"] = 0] = "SourceElements";
            ParsingContext[ParsingContext["BlockStatements"] = 1] = "BlockStatements";
            ParsingContext[ParsingContext["SwitchClauses"] = 2] = "SwitchClauses";
            ParsingContext[ParsingContext["SwitchClauseStatements"] = 3] = "SwitchClauseStatements";
            ParsingContext[ParsingContext["TypeMembers"] = 4] = "TypeMembers";
            ParsingContext[ParsingContext["ClassMembers"] = 5] = "ClassMembers";
            ParsingContext[ParsingContext["EnumMembers"] = 6] = "EnumMembers";
            ParsingContext[ParsingContext["HeritageClauseElement"] = 7] = "HeritageClauseElement";
            ParsingContext[ParsingContext["VariableDeclarations"] = 8] = "VariableDeclarations";
            ParsingContext[ParsingContext["ObjectBindingElements"] = 9] = "ObjectBindingElements";
            ParsingContext[ParsingContext["ArrayBindingElements"] = 10] = "ArrayBindingElements";
            ParsingContext[ParsingContext["ArgumentExpressions"] = 11] = "ArgumentExpressions";
            ParsingContext[ParsingContext["ObjectLiteralMembers"] = 12] = "ObjectLiteralMembers";
            ParsingContext[ParsingContext["JsxAttributes"] = 13] = "JsxAttributes";
            ParsingContext[ParsingContext["JsxChildren"] = 14] = "JsxChildren";
            ParsingContext[ParsingContext["ArrayLiteralMembers"] = 15] = "ArrayLiteralMembers";
            ParsingContext[ParsingContext["Parameters"] = 16] = "Parameters";
            ParsingContext[ParsingContext["RestProperties"] = 17] = "RestProperties";
            ParsingContext[ParsingContext["TypeParameters"] = 18] = "TypeParameters";
            ParsingContext[ParsingContext["TypeArguments"] = 19] = "TypeArguments";
            ParsingContext[ParsingContext["TupleElementTypes"] = 20] = "TupleElementTypes";
            ParsingContext[ParsingContext["HeritageClauses"] = 21] = "HeritageClauses";
            ParsingContext[ParsingContext["ImportOrExportSpecifiers"] = 22] = "ImportOrExportSpecifiers";
            ParsingContext[ParsingContext["Count"] = 23] = "Count"; // Number of parsing contexts
        })(ParsingContext || (ParsingContext = {}));
        var Tristate;
        (function (Tristate) {
            Tristate[Tristate["False"] = 0] = "False";
            Tristate[Tristate["True"] = 1] = "True";
            Tristate[Tristate["Unknown"] = 2] = "Unknown";
        })(Tristate || (Tristate = {}));
        var JSDocParser;
        (function (JSDocParser) {
            function parseJSDocTypeExpressionForTests(content, start, length) {
                initializeState(content, 6 /* Latest */, /*_syntaxCursor:*/ undefined, 1 /* JS */);
                sourceFile = createSourceFile("file.js", 6 /* Latest */, 1 /* JS */, /*isDeclarationFile*/ false);
                scanner.setText(content, start, length);
                currentToken = scanner.scan();
                var jsDocTypeExpression = parseJSDocTypeExpression();
                var diagnostics = parseDiagnostics;
                clearState();
                return jsDocTypeExpression ? { jsDocTypeExpression: jsDocTypeExpression, diagnostics: diagnostics } : undefined;
            }
            JSDocParser.parseJSDocTypeExpressionForTests = parseJSDocTypeExpressionForTests;
            // Parses out a JSDoc type expression.
            function parseJSDocTypeExpression(mayOmitBraces) {
                var result = createNode(278 /* JSDocTypeExpression */, scanner.getTokenPos());
                var hasBrace = (mayOmitBraces ? parseOptional : parseExpected)(17 /* OpenBraceToken */);
                result.type = doInsideOfContext(2097152 /* JSDoc */, parseJSDocType);
                if (!mayOmitBraces || hasBrace) {
                    parseExpected(18 /* CloseBraceToken */);
                }
                fixupParentReferences(result);
                return finishNode(result);
            }
            JSDocParser.parseJSDocTypeExpression = parseJSDocTypeExpression;
            function parseIsolatedJSDocComment(content, start, length) {
                initializeState(content, 6 /* Latest */, /*_syntaxCursor:*/ undefined, 1 /* JS */);
                sourceFile = { languageVariant: 0 /* Standard */, text: content }; // tslint:disable-line no-object-literal-type-assertion
                var jsDoc = parseJSDocCommentWorker(start, length);
                var diagnostics = parseDiagnostics;
                clearState();
                return jsDoc ? { jsDoc: jsDoc, diagnostics: diagnostics } : undefined;
            }
            JSDocParser.parseIsolatedJSDocComment = parseIsolatedJSDocComment;
            function parseJSDocComment(parent, start, length) {
                var _a;
                var saveToken = currentToken;
                var saveParseDiagnosticsLength = parseDiagnostics.length;
                var saveParseErrorBeforeNextFinishedNode = parseErrorBeforeNextFinishedNode;
                var comment = parseJSDocCommentWorker(start, length);
                if (comment) {
                    comment.parent = parent;
                }
                if (contextFlags & 65536 /* JavaScriptFile */) {
                    if (!sourceFile.jsDocDiagnostics) {
                        sourceFile.jsDocDiagnostics = [];
                    }
                    (_a = sourceFile.jsDocDiagnostics).push.apply(_a, parseDiagnostics);
                }
                currentToken = saveToken;
                parseDiagnostics.length = saveParseDiagnosticsLength;
                parseErrorBeforeNextFinishedNode = saveParseErrorBeforeNextFinishedNode;
                return comment;
            }
            JSDocParser.parseJSDocComment = parseJSDocComment;
            var JSDocState;
            (function (JSDocState) {
                JSDocState[JSDocState["BeginningOfLine"] = 0] = "BeginningOfLine";
                JSDocState[JSDocState["SawAsterisk"] = 1] = "SawAsterisk";
                JSDocState[JSDocState["SavingComments"] = 2] = "SavingComments";
            })(JSDocState || (JSDocState = {}));
            var PropertyLikeParse;
            (function (PropertyLikeParse) {
                PropertyLikeParse[PropertyLikeParse["Property"] = 1] = "Property";
                PropertyLikeParse[PropertyLikeParse["Parameter"] = 2] = "Parameter";
                PropertyLikeParse[PropertyLikeParse["CallbackParameter"] = 4] = "CallbackParameter";
            })(PropertyLikeParse || (PropertyLikeParse = {}));
            function parseJSDocCommentWorker(start, length) {
                if (start === void 0) { start = 0; }
                var content = sourceText;
                var end = length === undefined ? content.length : start + length;
                length = end - start;
                ts.Debug.assert(start >= 0);
                ts.Debug.assert(start <= end);
                ts.Debug.assert(end <= content.length);
                var tags;
                var tagsPos;
                var tagsEnd;
                var comments = [];
                var result;
                // Check for /** (JSDoc opening part)
                if (!isJSDocLikeText(content, start)) {
                    return result;
                }
                // + 3 for leading /**, - 5 in total for /** */
                scanner.scanRange(start + 3, length - 5, function () {
                    // Initially we can parse out a tag.  We also have seen a starting asterisk.
                    // This is so that /** * @type */ doesn't parse.
                    var state = 1 /* SawAsterisk */;
                    var margin;
                    // + 4 for leading '/** '
                    var indent = start - Math.max(content.lastIndexOf("\n", start), 0) + 4;
                    function pushComment(text) {
                        if (!margin) {
                            margin = indent;
                        }
                        comments.push(text);
                        indent += text.length;
                    }
                    nextJSDocToken();
                    while (parseOptionalJsdoc(5 /* WhitespaceTrivia */))
                        ;
                    if (parseOptionalJsdoc(4 /* NewLineTrivia */)) {
                        state = 0 /* BeginningOfLine */;
                        indent = 0;
                    }
                    loop: while (true) {
                        switch (token()) {
                            case 57 /* AtToken */:
                                if (state === 0 /* BeginningOfLine */ || state === 1 /* SawAsterisk */) {
                                    removeTrailingNewlines(comments);
                                    addTag(parseTag(indent));
                                    // NOTE: According to usejsdoc.org, a tag goes to end of line, except the last tag.
                                    // Real-world comments may break this rule, so "BeginningOfLine" will not be a real line beginning
                                    // for malformed examples like `/** @param {string} x @returns {number} the length */`
                                    state = 0 /* BeginningOfLine */;
                                    margin = undefined;
                                    indent++;
                                }
                                else {
                                    pushComment(scanner.getTokenText());
                                }
                                break;
                            case 4 /* NewLineTrivia */:
                                comments.push(scanner.getTokenText());
                                state = 0 /* BeginningOfLine */;
                                indent = 0;
                                break;
                            case 39 /* AsteriskToken */:
                                var asterisk = scanner.getTokenText();
                                if (state === 1 /* SawAsterisk */ || state === 2 /* SavingComments */) {
                                    // If we've already seen an asterisk, then we can no longer parse a tag on this line
                                    state = 2 /* SavingComments */;
                                    pushComment(asterisk);
                                }
                                else {
                                    // Ignore the first asterisk on a line
                                    state = 1 /* SawAsterisk */;
                                    indent += asterisk.length;
                                }
                                break;
                            case 71 /* Identifier */:
                                // Anything else is doc comment text. We just save it. Because it
                                // wasn't a tag, we can no longer parse a tag on this line until we hit the next
                                // line break.
                                pushComment(scanner.getTokenText());
                                state = 2 /* SavingComments */;
                                break;
                            case 5 /* WhitespaceTrivia */:
                                // only collect whitespace if we're already saving comments or have just crossed the comment indent margin
                                var whitespace = scanner.getTokenText();
                                if (state === 2 /* SavingComments */) {
                                    comments.push(whitespace);
                                }
                                else if (margin !== undefined && indent + whitespace.length > margin) {
                                    comments.push(whitespace.slice(margin - indent - 1));
                                }
                                indent += whitespace.length;
                                break;
                            case 1 /* EndOfFileToken */:
                                break loop;
                            default:
                                // anything other than whitespace or asterisk at the beginning of the line starts the comment text
                                state = 2 /* SavingComments */;
                                pushComment(scanner.getTokenText());
                                break;
                        }
                        nextJSDocToken();
                    }
                    removeLeadingNewlines(comments);
                    removeTrailingNewlines(comments);
                    result = createJSDocComment();
                });
                return result;
                function removeLeadingNewlines(comments) {
                    while (comments.length && (comments[0] === "\n" || comments[0] === "\r")) {
                        comments.shift();
                    }
                }
                function removeTrailingNewlines(comments) {
                    while (comments.length && (comments[comments.length - 1] === "\n" || comments[comments.length - 1] === "\r")) {
                        comments.pop();
                    }
                }
                function createJSDocComment() {
                    var result = createNode(286 /* JSDocComment */, start);
                    result.tags = tags && createNodeArray(tags, tagsPos, tagsEnd);
                    result.comment = comments.length ? comments.join("") : undefined;
                    return finishNode(result, end);
                }
                function isNextNonwhitespaceTokenEndOfFile() {
                    // We must use infinite lookahead, as there could be any number of newlines :(
                    while (true) {
                        nextJSDocToken();
                        if (token() === 1 /* EndOfFileToken */) {
                            return true;
                        }
                        if (!(token() === 5 /* WhitespaceTrivia */ || token() === 4 /* NewLineTrivia */)) {
                            return false;
                        }
                    }
                }
                function skipWhitespace() {
                    if (token() === 5 /* WhitespaceTrivia */ || token() === 4 /* NewLineTrivia */) {
                        if (lookAhead(isNextNonwhitespaceTokenEndOfFile)) {
                            return; // Don't skip whitespace prior to EoF (or end of comment) - that shouldn't be included in any node's range
                        }
                    }
                    while (token() === 5 /* WhitespaceTrivia */ || token() === 4 /* NewLineTrivia */) {
                        nextJSDocToken();
                    }
                }
                function parseTag(indent) {
                    ts.Debug.assert(token() === 57 /* AtToken */);
                    var atToken = createNode(57 /* AtToken */, scanner.getTokenPos());
                    atToken.end = scanner.getTextPos();
                    nextJSDocToken();
                    var tagName = parseJSDocIdentifierName();
                    skipWhitespace();
                    var tag;
                    switch (tagName.escapedText) {
                        case "augments":
                        case "extends":
                            tag = parseAugmentsTag(atToken, tagName);
                            break;
                        case "class":
                        case "constructor":
                            tag = parseClassTag(atToken, tagName);
                            break;
                        case "arg":
                        case "argument":
                        case "param":
                            return parseParameterOrPropertyTag(atToken, tagName, 2 /* Parameter */, indent);
                        case "return":
                        case "returns":
                            tag = parseReturnTag(atToken, tagName);
                            break;
                        case "template":
                            tag = parseTemplateTag(atToken, tagName);
                            break;
                        case "type":
                            tag = parseTypeTag(atToken, tagName);
                            break;
                        case "typedef":
                            tag = parseTypedefTag(atToken, tagName, indent);
                            break;
                        case "callback":
                            tag = parseCallbackTag(atToken, tagName, indent);
                            break;
                        default:
                            tag = parseUnknownTag(atToken, tagName);
                            break;
                    }
                    if (!tag.comment) {
                        // some tags, like typedef and callback, have already parsed their comments earlier
                        tag.comment = parseTagComments(indent + tag.end - tag.pos);
                    }
                    return tag;
                }
                function parseTagComments(indent) {
                    var comments = [];
                    var state = 0 /* BeginningOfLine */;
                    var margin;
                    function pushComment(text) {
                        if (!margin) {
                            margin = indent;
                        }
                        comments.push(text);
                        indent += text.length;
                    }
                    var tok = token();
                    loop: while (true) {
                        switch (tok) {
                            case 4 /* NewLineTrivia */:
                                if (state >= 1 /* SawAsterisk */) {
                                    state = 0 /* BeginningOfLine */;
                                    comments.push(scanner.getTokenText());
                                }
                                indent = 0;
                                break;
                            case 57 /* AtToken */:
                                scanner.setTextPos(scanner.getTextPos() - 1);
                            // falls through
                            case 1 /* EndOfFileToken */:
                                // Done
                                break loop;
                            case 5 /* WhitespaceTrivia */:
                                if (state === 2 /* SavingComments */) {
                                    pushComment(scanner.getTokenText());
                                }
                                else {
                                    var whitespace = scanner.getTokenText();
                                    // if the whitespace crosses the margin, take only the whitespace that passes the margin
                                    if (margin !== undefined && indent + whitespace.length > margin) {
                                        comments.push(whitespace.slice(margin - indent - 1));
                                    }
                                    indent += whitespace.length;
                                }
                                break;
                            case 39 /* AsteriskToken */:
                                if (state === 0 /* BeginningOfLine */) {
                                    // leading asterisks start recording on the *next* (non-whitespace) token
                                    state = 1 /* SawAsterisk */;
                                    indent += 1;
                                    break;
                                }
                            // record the * as a comment
                            // falls through
                            default:
                                state = 2 /* SavingComments */; // leading identifiers start recording as well
                                pushComment(scanner.getTokenText());
                                break;
                        }
                        tok = nextJSDocToken();
                    }
                    removeLeadingNewlines(comments);
                    removeTrailingNewlines(comments);
                    return comments.length === 0 ? undefined : comments.join("");
                }
                function parseUnknownTag(atToken, tagName) {
                    var result = createNode(289 /* JSDocTag */, atToken.pos);
                    result.atToken = atToken;
                    result.tagName = tagName;
                    return finishNode(result);
                }
                function addTag(tag) {
                    if (!tag) {
                        return;
                    }
                    if (!tags) {
                        tags = [tag];
                        tagsPos = tag.pos;
                    }
                    else {
                        tags.push(tag);
                    }
                    tagsEnd = tag.end;
                }
                function tryParseTypeExpression() {
                    skipWhitespace();
                    return token() === 17 /* OpenBraceToken */ ? parseJSDocTypeExpression() : undefined;
                }
                function parseBracketNameInPropertyAndParamTag() {
                    if (token() === 13 /* NoSubstitutionTemplateLiteral */) {
                        // a markdown-quoted name: `arg` is not legal jsdoc, but occurs in the wild
                        return { name: createIdentifier(/*isIdentifier*/ true), isBracketed: false };
                    }
                    // Looking for something like '[foo]', 'foo', '[foo.bar]' or 'foo.bar'
                    var isBracketed = parseOptional(21 /* OpenBracketToken */);
                    var name = parseJSDocEntityName();
                    if (isBracketed) {
                        skipWhitespace();
                        // May have an optional default, e.g. '[foo = 42]'
                        if (parseOptionalToken(58 /* EqualsToken */)) {
                            parseExpression();
                        }
                        parseExpected(22 /* CloseBracketToken */);
                    }
                    return { name: name, isBracketed: isBracketed };
                }
                function isObjectOrObjectArrayTypeReference(node) {
                    switch (node.kind) {
                        case 135 /* ObjectKeyword */:
                            return true;
                        case 167 /* ArrayType */:
                            return isObjectOrObjectArrayTypeReference(node.elementType);
                        default:
                            return ts.isTypeReferenceNode(node) && ts.isIdentifier(node.typeName) && node.typeName.escapedText === "Object";
                    }
                }
                function parseParameterOrPropertyTag(atToken, tagName, target, indent) {
                    var typeExpression = tryParseTypeExpression();
                    var isNameFirst = !typeExpression;
                    skipWhitespace();
                    var _a = parseBracketNameInPropertyAndParamTag(), name = _a.name, isBracketed = _a.isBracketed;
                    skipWhitespace();
                    if (isNameFirst) {
                        typeExpression = tryParseTypeExpression();
                    }
                    var result = target === 1 /* Property */ ?
                        createNode(298 /* JSDocPropertyTag */, atToken.pos) :
                        createNode(293 /* JSDocParameterTag */, atToken.pos);
                    var comment;
                    if (indent !== undefined)
                        comment = parseTagComments(indent + scanner.getStartPos() - atToken.pos);
                    var nestedTypeLiteral = target !== 4 /* CallbackParameter */ && parseNestedTypeLiteral(typeExpression, name, target);
                    if (nestedTypeLiteral) {
                        typeExpression = nestedTypeLiteral;
                        isNameFirst = true;
                    }
                    result.atToken = atToken;
                    result.tagName = tagName;
                    result.typeExpression = typeExpression;
                    result.name = name;
                    result.isNameFirst = isNameFirst;
                    result.isBracketed = isBracketed;
                    result.comment = comment;
                    return finishNode(result);
                }
                function parseNestedTypeLiteral(typeExpression, name, target) {
                    if (typeExpression && isObjectOrObjectArrayTypeReference(typeExpression.type)) {
                        var typeLiteralExpression = createNode(278 /* JSDocTypeExpression */, scanner.getTokenPos());
                        var child = void 0;
                        var jsdocTypeLiteral = void 0;
                        var start_2 = scanner.getStartPos();
                        var children = void 0;
                        while (child = tryParse(function () { return parseChildParameterOrPropertyTag(target, name); })) {
                            if (child.kind === 293 /* JSDocParameterTag */ || child.kind === 298 /* JSDocPropertyTag */) {
                                children = ts.append(children, child);
                            }
                        }
                        if (children) {
                            jsdocTypeLiteral = createNode(287 /* JSDocTypeLiteral */, start_2);
                            jsdocTypeLiteral.jsDocPropertyTags = children;
                            if (typeExpression.type.kind === 167 /* ArrayType */) {
                                jsdocTypeLiteral.isArrayType = true;
                            }
                            typeLiteralExpression.type = finishNode(jsdocTypeLiteral);
                            return finishNode(typeLiteralExpression);
                        }
                    }
                }
                function parseReturnTag(atToken, tagName) {
                    if (ts.forEach(tags, function (t) { return t.kind === 294 /* JSDocReturnTag */; })) {
                        parseErrorAt(tagName.pos, scanner.getTokenPos(), ts.Diagnostics._0_tag_already_specified, tagName.escapedText);
                    }
                    var result = createNode(294 /* JSDocReturnTag */, atToken.pos);
                    result.atToken = atToken;
                    result.tagName = tagName;
                    result.typeExpression = tryParseTypeExpression();
                    return finishNode(result);
                }
                function parseTypeTag(atToken, tagName) {
                    if (ts.forEach(tags, function (t) { return t.kind === 295 /* JSDocTypeTag */; })) {
                        parseErrorAt(tagName.pos, scanner.getTokenPos(), ts.Diagnostics._0_tag_already_specified, tagName.escapedText);
                    }
                    var result = createNode(295 /* JSDocTypeTag */, atToken.pos);
                    result.atToken = atToken;
                    result.tagName = tagName;
                    result.typeExpression = parseJSDocTypeExpression(/*mayOmitBraces*/ true);
                    return finishNode(result);
                }
                function parseAugmentsTag(atToken, tagName) {
                    var result = createNode(290 /* JSDocAugmentsTag */, atToken.pos);
                    result.atToken = atToken;
                    result.tagName = tagName;
                    result.class = parseExpressionWithTypeArgumentsForAugments();
                    return finishNode(result);
                }
                function parseExpressionWithTypeArgumentsForAugments() {
                    var usedBrace = parseOptional(17 /* OpenBraceToken */);
                    var node = createNode(207 /* ExpressionWithTypeArguments */);
                    node.expression = parsePropertyAccessEntityNameExpression();
                    node.typeArguments = tryParseTypeArguments();
                    var res = finishNode(node);
                    if (usedBrace) {
                        parseExpected(18 /* CloseBraceToken */);
                    }
                    return res;
                }
                function parsePropertyAccessEntityNameExpression() {
                    var node = parseJSDocIdentifierName();
                    while (parseOptional(23 /* DotToken */)) {
                        var prop = createNode(185 /* PropertyAccessExpression */, node.pos);
                        prop.expression = node;
                        prop.name = parseJSDocIdentifierName();
                        node = finishNode(prop);
                    }
                    return node;
                }
                function parseClassTag(atToken, tagName) {
                    var tag = createNode(291 /* JSDocClassTag */, atToken.pos);
                    tag.atToken = atToken;
                    tag.tagName = tagName;
                    return finishNode(tag);
                }
                function parseTypedefTag(atToken, tagName, indent) {
                    var typeExpression = tryParseTypeExpression();
                    skipWhitespace();
                    var typedefTag = createNode(297 /* JSDocTypedefTag */, atToken.pos);
                    typedefTag.atToken = atToken;
                    typedefTag.tagName = tagName;
                    typedefTag.fullName = parseJSDocTypeNameWithNamespace();
                    typedefTag.name = getJSDocTypeAliasName(typedefTag.fullName);
                    skipWhitespace();
                    typedefTag.comment = parseTagComments(indent);
                    typedefTag.typeExpression = typeExpression;
                    var end;
                    if (!typeExpression || isObjectOrObjectArrayTypeReference(typeExpression.type)) {
                        var child = void 0;
                        var jsdocTypeLiteral = void 0;
                        var childTypeTag = void 0;
                        var start_3 = scanner.getStartPos();
                        while (child = tryParse(function () { return parseChildPropertyTag(); })) {
                            if (!jsdocTypeLiteral) {
                                jsdocTypeLiteral = createNode(287 /* JSDocTypeLiteral */, start_3);
                            }
                            if (child.kind === 295 /* JSDocTypeTag */) {
                                if (childTypeTag) {
                                    break;
                                }
                                else {
                                    childTypeTag = child;
                                }
                            }
                            else {
                                jsdocTypeLiteral.jsDocPropertyTags = ts.append(jsdocTypeLiteral.jsDocPropertyTags, child);
                            }
                        }
                        if (jsdocTypeLiteral) {
                            if (typeExpression && typeExpression.type.kind === 167 /* ArrayType */) {
                                jsdocTypeLiteral.isArrayType = true;
                            }
                            typedefTag.typeExpression = childTypeTag && childTypeTag.typeExpression && !isObjectOrObjectArrayTypeReference(childTypeTag.typeExpression.type) ?
                                childTypeTag.typeExpression :
                                finishNode(jsdocTypeLiteral);
                            end = typedefTag.typeExpression.end;
                        }
                    }
                    // Only include the characters between the name end and the next token if a comment was actually parsed out - otherwise it's just whitespace
                    return finishNode(typedefTag, end || typedefTag.comment !== undefined ? scanner.getStartPos() : (typedefTag.fullName || typedefTag.typeExpression || typedefTag.tagName).end);
                }
                function parseJSDocTypeNameWithNamespace(nested) {
                    var pos = scanner.getTokenPos();
                    if (!ts.tokenIsIdentifierOrKeyword(token())) {
                        return undefined;
                    }
                    var typeNameOrNamespaceName = parseJSDocIdentifierName();
                    if (parseOptional(23 /* DotToken */)) {
                        var jsDocNamespaceNode = createNode(239 /* ModuleDeclaration */, pos);
                        if (nested) {
                            jsDocNamespaceNode.flags |= 4 /* NestedNamespace */;
                        }
                        jsDocNamespaceNode.name = typeNameOrNamespaceName;
                        jsDocNamespaceNode.body = parseJSDocTypeNameWithNamespace(/*nested*/ true);
                        return finishNode(jsDocNamespaceNode);
                    }
                    if (nested) {
                        typeNameOrNamespaceName.isInJSDocNamespace = true;
                    }
                    return typeNameOrNamespaceName;
                }
                function parseCallbackTag(atToken, tagName, indent) {
                    var callbackTag = createNode(292 /* JSDocCallbackTag */, atToken.pos);
                    callbackTag.atToken = atToken;
                    callbackTag.tagName = tagName;
                    callbackTag.fullName = parseJSDocTypeNameWithNamespace();
                    callbackTag.name = getJSDocTypeAliasName(callbackTag.fullName);
                    skipWhitespace();
                    callbackTag.comment = parseTagComments(indent);
                    var child;
                    var start = scanner.getStartPos();
                    var jsdocSignature = createNode(288 /* JSDocSignature */, start);
                    jsdocSignature.parameters = [];
                    while (child = tryParse(function () { return parseChildParameterOrPropertyTag(4 /* CallbackParameter */); })) {
                        jsdocSignature.parameters = ts.append(jsdocSignature.parameters, child);
                    }
                    var returnTag = tryParse(function () {
                        if (parseOptionalJsdoc(57 /* AtToken */)) {
                            var tag = parseTag(indent);
                            if (tag && tag.kind === 294 /* JSDocReturnTag */) {
                                return tag;
                            }
                        }
                    });
                    if (returnTag) {
                        jsdocSignature.type = returnTag;
                    }
                    callbackTag.typeExpression = finishNode(jsdocSignature);
                    return finishNode(callbackTag);
                }
                function getJSDocTypeAliasName(fullName) {
                    if (fullName) {
                        var rightNode = fullName;
                        while (true) {
                            if (ts.isIdentifier(rightNode) || !rightNode.body) {
                                return ts.isIdentifier(rightNode) ? rightNode : rightNode.name;
                            }
                            rightNode = rightNode.body;
                        }
                    }
                }
                function escapedTextsEqual(a, b) {
                    while (!ts.isIdentifier(a) || !ts.isIdentifier(b)) {
                        if (!ts.isIdentifier(a) && !ts.isIdentifier(b) && a.right.escapedText === b.right.escapedText) {
                            a = a.left;
                            b = b.left;
                        }
                        else {
                            return false;
                        }
                    }
                    return a.escapedText === b.escapedText;
                }
                function parseChildPropertyTag() {
                    return parseChildParameterOrPropertyTag(1 /* Property */);
                }
                function parseChildParameterOrPropertyTag(target, name) {
                    var canParseTag = true;
                    var seenAsterisk = false;
                    while (true) {
                        switch (nextJSDocToken()) {
                            case 57 /* AtToken */:
                                if (canParseTag) {
                                    var child = tryParseChildTag(target);
                                    if (child && child.kind === 293 /* JSDocParameterTag */ &&
                                        target !== 4 /* CallbackParameter */ &&
                                        (ts.isIdentifier(child.name) || !escapedTextsEqual(name, child.name.left))) { // TODO: GH#18217
                                        return false;
                                    }
                                    return child;
                                }
                                seenAsterisk = false;
                                break;
                            case 4 /* NewLineTrivia */:
                                canParseTag = true;
                                seenAsterisk = false;
                                break;
                            case 39 /* AsteriskToken */:
                                if (seenAsterisk) {
                                    canParseTag = false;
                                }
                                seenAsterisk = true;
                                break;
                            case 71 /* Identifier */:
                                canParseTag = false;
                                break;
                            case 1 /* EndOfFileToken */:
                                return false;
                        }
                    }
                }
                function tryParseChildTag(target) {
                    ts.Debug.assert(token() === 57 /* AtToken */);
                    var atToken = createNode(57 /* AtToken */);
                    atToken.end = scanner.getTextPos();
                    nextJSDocToken();
                    var tagName = parseJSDocIdentifierName();
                    skipWhitespace();
                    var t;
                    switch (tagName.escapedText) {
                        case "type":
                            return target === 1 /* Property */ && parseTypeTag(atToken, tagName);
                        case "prop":
                        case "property":
                            t = 1 /* Property */;
                            break;
                        case "arg":
                        case "argument":
                        case "param":
                            t = 2 /* Parameter */ | 4 /* CallbackParameter */;
                            break;
                        default:
                            return false;
                    }
                    if (!(target & t)) {
                        return false;
                    }
                    var tag = parseParameterOrPropertyTag(atToken, tagName, target, /*indent*/ undefined);
                    tag.comment = parseTagComments(tag.end - tag.pos);
                    return tag;
                }
                function parseTemplateTag(atToken, tagName) {
                    // the template tag looks like '@template {Constraint} T,U,V'
                    var constraint;
                    if (token() === 17 /* OpenBraceToken */) {
                        constraint = parseJSDocTypeExpression();
                    }
                    var typeParameters = [];
                    var typeParametersPos = getNodePos();
                    do {
                        skipWhitespace();
                        var typeParameter = createNode(148 /* TypeParameter */);
                        typeParameter.name = parseJSDocIdentifierName(ts.Diagnostics.Unexpected_token_A_type_parameter_name_was_expected_without_curly_braces);
                        skipWhitespace();
                        finishNode(typeParameter);
                        typeParameters.push(typeParameter);
                    } while (parseOptionalJsdoc(26 /* CommaToken */));
                    if (constraint) {
                        ts.first(typeParameters).constraint = constraint.type;
                    }
                    var result = createNode(296 /* JSDocTemplateTag */, atToken.pos);
                    result.atToken = atToken;
                    result.tagName = tagName;
                    result.typeParameters = createNodeArray(typeParameters, typeParametersPos);
                    finishNode(result);
                    return result;
                }
                function nextJSDocToken() {
                    return currentToken = scanner.scanJSDocToken();
                }
                function parseOptionalJsdoc(t) {
                    if (token() === t) {
                        nextJSDocToken();
                        return true;
                    }
                    return false;
                }
                function parseJSDocEntityName() {
                    var entity = parseJSDocIdentifierName();
                    if (parseOptional(21 /* OpenBracketToken */)) {
                        parseExpected(22 /* CloseBracketToken */);
                        // Note that y[] is accepted as an entity name, but the postfix brackets are not saved for checking.
                        // Technically usejsdoc.org requires them for specifying a property of a type equivalent to Array<{ x: ...}>
                        // but it's not worth it to enforce that restriction.
                    }
                    while (parseOptional(23 /* DotToken */)) {
                        var name = parseJSDocIdentifierName();
                        if (parseOptional(21 /* OpenBracketToken */)) {
                            parseExpected(22 /* CloseBracketToken */);
                        }
                        entity = createQualifiedName(entity, name);
                    }
                    return entity;
                }
                function parseJSDocIdentifierName(message) {
                    if (!ts.tokenIsIdentifierOrKeyword(token())) {
                        return createMissingNode(71 /* Identifier */, /*reportAtCurrentPosition*/ !message, message || ts.Diagnostics.Identifier_expected);
                    }
                    var pos = scanner.getTokenPos();
                    var end = scanner.getTextPos();
                    var result = createNode(71 /* Identifier */, pos);
                    result.escapedText = ts.escapeLeadingUnderscores(scanner.getTokenText());
                    finishNode(result, end);
                    nextJSDocToken();
                    return result;
                }
            }
            JSDocParser.parseJSDocCommentWorker = parseJSDocCommentWorker;
        })(JSDocParser = Parser.JSDocParser || (Parser.JSDocParser = {}));
    })(Parser || (Parser = {}));
    var IncrementalParser;
    (function (IncrementalParser) {
        function updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks) {
            aggressiveChecks = aggressiveChecks || ts.Debug.shouldAssert(2 /* Aggressive */);
            checkChangeRange(sourceFile, newText, textChangeRange, aggressiveChecks);
            if (ts.textChangeRangeIsUnchanged(textChangeRange)) {
                // if the text didn't change, then we can just return our current source file as-is.
                return sourceFile;
            }
            if (sourceFile.statements.length === 0) {
                // If we don't have any statements in the current source file, then there's no real
                // way to incrementally parse.  So just do a full parse instead.
                return Parser.parseSourceFile(sourceFile.fileName, newText, sourceFile.languageVersion, /*syntaxCursor*/ undefined, /*setParentNodes*/ true, sourceFile.scriptKind);
            }
            // Make sure we're not trying to incrementally update a source file more than once.  Once
            // we do an update the original source file is considered unusable from that point onwards.
            //
            // This is because we do incremental parsing in-place.  i.e. we take nodes from the old
            // tree and give them new positions and parents.  From that point on, trusting the old
            // tree at all is not possible as far too much of it may violate invariants.
            var incrementalSourceFile = sourceFile;
            ts.Debug.assert(!incrementalSourceFile.hasBeenIncrementallyParsed);
            incrementalSourceFile.hasBeenIncrementallyParsed = true;
            var oldText = sourceFile.text;
            var syntaxCursor = createSyntaxCursor(sourceFile);
            // Make the actual change larger so that we know to reparse anything whose lookahead
            // might have intersected the change.
            var changeRange = extendToAffectedRange(sourceFile, textChangeRange);
            checkChangeRange(sourceFile, newText, changeRange, aggressiveChecks);
            // Ensure that extending the affected range only moved the start of the change range
            // earlier in the file.
            ts.Debug.assert(changeRange.span.start <= textChangeRange.span.start);
            ts.Debug.assert(ts.textSpanEnd(changeRange.span) === ts.textSpanEnd(textChangeRange.span));
            ts.Debug.assert(ts.textSpanEnd(ts.textChangeRangeNewSpan(changeRange)) === ts.textSpanEnd(ts.textChangeRangeNewSpan(textChangeRange)));
            // The is the amount the nodes after the edit range need to be adjusted.  It can be
            // positive (if the edit added characters), negative (if the edit deleted characters)
            // or zero (if this was a pure overwrite with nothing added/removed).
            var delta = ts.textChangeRangeNewSpan(changeRange).length - changeRange.span.length;
            // If we added or removed characters during the edit, then we need to go and adjust all
            // the nodes after the edit.  Those nodes may move forward (if we inserted chars) or they
            // may move backward (if we deleted chars).
            //
            // Doing this helps us out in two ways.  First, it means that any nodes/tokens we want
            // to reuse are already at the appropriate position in the new text.  That way when we
            // reuse them, we don't have to figure out if they need to be adjusted.  Second, it makes
            // it very easy to determine if we can reuse a node.  If the node's position is at where
            // we are in the text, then we can reuse it.  Otherwise we can't.  If the node's position
            // is ahead of us, then we'll need to rescan tokens.  If the node's position is behind
            // us, then we'll need to skip it or crumble it as appropriate
            //
            // We will also adjust the positions of nodes that intersect the change range as well.
            // By doing this, we ensure that all the positions in the old tree are consistent, not
            // just the positions of nodes entirely before/after the change range.  By being
            // consistent, we can then easily map from positions to nodes in the old tree easily.
            //
            // Also, mark any syntax elements that intersect the changed span.  We know, up front,
            // that we cannot reuse these elements.
            updateTokenPositionsAndMarkElements(incrementalSourceFile, changeRange.span.start, ts.textSpanEnd(changeRange.span), ts.textSpanEnd(ts.textChangeRangeNewSpan(changeRange)), delta, oldText, newText, aggressiveChecks);
            // Now that we've set up our internal incremental state just proceed and parse the
            // source file in the normal fashion.  When possible the parser will retrieve and
            // reuse nodes from the old tree.
            //
            // Note: passing in 'true' for setNodeParents is very important.  When incrementally
            // parsing, we will be reusing nodes from the old tree, and placing it into new
            // parents.  If we don't set the parents now, we'll end up with an observably
            // inconsistent tree.  Setting the parents on the new tree should be very fast.  We
            // will immediately bail out of walking any subtrees when we can see that their parents
            // are already correct.
            var result = Parser.parseSourceFile(sourceFile.fileName, newText, sourceFile.languageVersion, syntaxCursor, /*setParentNodes*/ true, sourceFile.scriptKind);
            return result;
        }
        IncrementalParser.updateSourceFile = updateSourceFile;
        function moveElementEntirelyPastChangeRange(element, isArray, delta, oldText, newText, aggressiveChecks) {
            if (isArray) {
                visitArray(element);
            }
            else {
                visitNode(element);
            }
            return;
            function visitNode(node) {
                var text = "";
                if (aggressiveChecks && shouldCheckNode(node)) {
                    text = oldText.substring(node.pos, node.end);
                }
                // Ditch any existing LS children we may have created.  This way we can avoid
                // moving them forward.
                if (node._children) {
                    node._children = undefined;
                }
                node.pos += delta;
                node.end += delta;
                if (aggressiveChecks && shouldCheckNode(node)) {
                    ts.Debug.assert(text === newText.substring(node.pos, node.end));
                }
                forEachChild(node, visitNode, visitArray);
                if (ts.hasJSDocNodes(node)) {
                    for (var _i = 0, _a = node.jsDoc; _i < _a.length; _i++) {
                        var jsDocComment = _a[_i];
                        visitNode(jsDocComment);
                    }
                }
                checkNodePositions(node, aggressiveChecks);
            }
            function visitArray(array) {
                array._children = undefined;
                array.pos += delta;
                array.end += delta;
                for (var _i = 0, array_1 = array; _i < array_1.length; _i++) {
                    var node = array_1[_i];
                    visitNode(node);
                }
            }
        }
        function shouldCheckNode(node) {
            switch (node.kind) {
                case 9 /* StringLiteral */:
                case 8 /* NumericLiteral */:
                case 71 /* Identifier */:
                    return true;
            }
            return false;
        }
        function adjustIntersectingElement(element, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta) {
            ts.Debug.assert(element.end >= changeStart, "Adjusting an element that was entirely before the change range");
            ts.Debug.assert(element.pos <= changeRangeOldEnd, "Adjusting an element that was entirely after the change range");
            ts.Debug.assert(element.pos <= element.end);
            // We have an element that intersects the change range in some way.  It may have its
            // start, or its end (or both) in the changed range.  We want to adjust any part
            // that intersects such that the final tree is in a consistent state.  i.e. all
            // children have spans within the span of their parent, and all siblings are ordered
            // properly.
            // We may need to update both the 'pos' and the 'end' of the element.
            // If the 'pos' is before the start of the change, then we don't need to touch it.
            // If it isn't, then the 'pos' must be inside the change.  How we update it will
            // depend if delta is positive or negative. If delta is positive then we have
            // something like:
            //
            //  -------------------AAA-----------------
            //  -------------------BBBCCCCCCC-----------------
            //
            // In this case, we consider any node that started in the change range to still be
            // starting at the same position.
            //
            // however, if the delta is negative, then we instead have something like this:
            //
            //  -------------------XXXYYYYYYY-----------------
            //  -------------------ZZZ-----------------
            //
            // In this case, any element that started in the 'X' range will keep its position.
            // However any element that started after that will have their pos adjusted to be
            // at the end of the new range.  i.e. any node that started in the 'Y' range will
            // be adjusted to have their start at the end of the 'Z' range.
            //
            // The element will keep its position if possible.  Or Move backward to the new-end
            // if it's in the 'Y' range.
            element.pos = Math.min(element.pos, changeRangeNewEnd);
            // If the 'end' is after the change range, then we always adjust it by the delta
            // amount.  However, if the end is in the change range, then how we adjust it
            // will depend on if delta is positive or negative.  If delta is positive then we
            // have something like:
            //
            //  -------------------AAA-----------------
            //  -------------------BBBCCCCCCC-----------------
            //
            // In this case, we consider any node that ended inside the change range to keep its
            // end position.
            //
            // however, if the delta is negative, then we instead have something like this:
            //
            //  -------------------XXXYYYYYYY-----------------
            //  -------------------ZZZ-----------------
            //
            // In this case, any element that ended in the 'X' range will keep its position.
            // However any element that ended after that will have their pos adjusted to be
            // at the end of the new range.  i.e. any node that ended in the 'Y' range will
            // be adjusted to have their end at the end of the 'Z' range.
            if (element.end >= changeRangeOldEnd) {
                // Element ends after the change range.  Always adjust the end pos.
                element.end += delta;
            }
            else {
                // Element ends in the change range.  The element will keep its position if
                // possible. Or Move backward to the new-end if it's in the 'Y' range.
                element.end = Math.min(element.end, changeRangeNewEnd);
            }
            ts.Debug.assert(element.pos <= element.end);
            if (element.parent) {
                ts.Debug.assert(element.pos >= element.parent.pos);
                ts.Debug.assert(element.end <= element.parent.end);
            }
        }
        function checkNodePositions(node, aggressiveChecks) {
            if (aggressiveChecks) {
                var pos_2 = node.pos;
                var visitNode_1 = function (child) {
                    ts.Debug.assert(child.pos >= pos_2);
                    pos_2 = child.end;
                };
                if (ts.hasJSDocNodes(node)) {
                    for (var _i = 0, _a = node.jsDoc; _i < _a.length; _i++) {
                        var jsDocComment = _a[_i];
                        visitNode_1(jsDocComment);
                    }
                }
                forEachChild(node, visitNode_1);
                ts.Debug.assert(pos_2 <= node.end);
            }
        }
        function updateTokenPositionsAndMarkElements(sourceFile, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta, oldText, newText, aggressiveChecks) {
            visitNode(sourceFile);
            return;
            function visitNode(child) {
                ts.Debug.assert(child.pos <= child.end);
                if (child.pos > changeRangeOldEnd) {
                    // Node is entirely past the change range.  We need to move both its pos and
                    // end, forward or backward appropriately.
                    moveElementEntirelyPastChangeRange(child, /*isArray*/ false, delta, oldText, newText, aggressiveChecks);
                    return;
                }
                // Check if the element intersects the change range.  If it does, then it is not
                // reusable.  Also, we'll need to recurse to see what constituent portions we may
                // be able to use.
                var fullEnd = child.end;
                if (fullEnd >= changeStart) {
                    child.intersectsChange = true;
                    child._children = undefined;
                    // Adjust the pos or end (or both) of the intersecting element accordingly.
                    adjustIntersectingElement(child, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta);
                    forEachChild(child, visitNode, visitArray);
                    if (ts.hasJSDocNodes(child)) {
                        for (var _i = 0, _a = child.jsDoc; _i < _a.length; _i++) {
                            var jsDocComment = _a[_i];
                            visitNode(jsDocComment);
                        }
                    }
                    checkNodePositions(child, aggressiveChecks);
                    return;
                }
                // Otherwise, the node is entirely before the change range.  No need to do anything with it.
                ts.Debug.assert(fullEnd < changeStart);
            }
            function visitArray(array) {
                ts.Debug.assert(array.pos <= array.end);
                if (array.pos > changeRangeOldEnd) {
                    // Array is entirely after the change range.  We need to move it, and move any of
                    // its children.
                    moveElementEntirelyPastChangeRange(array, /*isArray*/ true, delta, oldText, newText, aggressiveChecks);
                    return;
                }
                // Check if the element intersects the change range.  If it does, then it is not
                // reusable.  Also, we'll need to recurse to see what constituent portions we may
                // be able to use.
                var fullEnd = array.end;
                if (fullEnd >= changeStart) {
                    array.intersectsChange = true;
                    array._children = undefined;
                    // Adjust the pos or end (or both) of the intersecting array accordingly.
                    adjustIntersectingElement(array, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta);
                    for (var _i = 0, array_2 = array; _i < array_2.length; _i++) {
                        var node = array_2[_i];
                        visitNode(node);
                    }
                    return;
                }
                // Otherwise, the array is entirely before the change range.  No need to do anything with it.
                ts.Debug.assert(fullEnd < changeStart);
            }
        }
        function extendToAffectedRange(sourceFile, changeRange) {
            // Consider the following code:
            //      void foo() { /; }
            //
            // If the text changes with an insertion of / just before the semicolon then we end up with:
            //      void foo() { //; }
            //
            // If we were to just use the changeRange a is, then we would not rescan the { token
            // (as it does not intersect the actual original change range).  Because an edit may
            // change the token touching it, we actually need to look back *at least* one token so
            // that the prior token sees that change.
            var maxLookahead = 1;
            var start = changeRange.span.start;
            // the first iteration aligns us with the change start. subsequent iteration move us to
            // the left by maxLookahead tokens.  We only need to do this as long as we're not at the
            // start of the tree.
            for (var i = 0; start > 0 && i <= maxLookahead; i++) {
                var nearestNode = findNearestNodeStartingBeforeOrAtPosition(sourceFile, start);
                ts.Debug.assert(nearestNode.pos <= start);
                var position = nearestNode.pos;
                start = Math.max(0, position - 1);
            }
            var finalSpan = ts.createTextSpanFromBounds(start, ts.textSpanEnd(changeRange.span));
            var finalLength = changeRange.newLength + (changeRange.span.start - start);
            return ts.createTextChangeRange(finalSpan, finalLength);
        }
        function findNearestNodeStartingBeforeOrAtPosition(sourceFile, position) {
            var bestResult = sourceFile;
            var lastNodeEntirelyBeforePosition;
            forEachChild(sourceFile, visit);
            if (lastNodeEntirelyBeforePosition) {
                var lastChildOfLastEntireNodeBeforePosition = getLastDescendant(lastNodeEntirelyBeforePosition);
                if (lastChildOfLastEntireNodeBeforePosition.pos > bestResult.pos) {
                    bestResult = lastChildOfLastEntireNodeBeforePosition;
                }
            }
            return bestResult;
            function getLastDescendant(node) {
                while (true) {
                    var lastChild = ts.getLastChild(node);
                    if (lastChild) {
                        node = lastChild;
                    }
                    else {
                        return node;
                    }
                }
            }
            function visit(child) {
                if (ts.nodeIsMissing(child)) {
                    // Missing nodes are effectively invisible to us.  We never even consider them
                    // When trying to find the nearest node before us.
                    return;
                }
                // If the child intersects this position, then this node is currently the nearest
                // node that starts before the position.
                if (child.pos <= position) {
                    if (child.pos >= bestResult.pos) {
                        // This node starts before the position, and is closer to the position than
                        // the previous best node we found.  It is now the new best node.
                        bestResult = child;
                    }
                    // Now, the node may overlap the position, or it may end entirely before the
                    // position.  If it overlaps with the position, then either it, or one of its
                    // children must be the nearest node before the position.  So we can just
                    // recurse into this child to see if we can find something better.
                    if (position < child.end) {
                        // The nearest node is either this child, or one of the children inside
                        // of it.  We've already marked this child as the best so far.  Recurse
                        // in case one of the children is better.
                        forEachChild(child, visit);
                        // Once we look at the children of this node, then there's no need to
                        // continue any further.
                        return true;
                    }
                    else {
                        ts.Debug.assert(child.end <= position);
                        // The child ends entirely before this position.  Say you have the following
                        // (where $ is the position)
                        //
                        //      <complex expr 1> ? <complex expr 2> $ : <...> <...>
                        //
                        // We would want to find the nearest preceding node in "complex expr 2".
                        // To support that, we keep track of this node, and once we're done searching
                        // for a best node, we recurse down this node to see if we can find a good
                        // result in it.
                        //
                        // This approach allows us to quickly skip over nodes that are entirely
                        // before the position, while still allowing us to find any nodes in the
                        // last one that might be what we want.
                        lastNodeEntirelyBeforePosition = child;
                    }
                }
                else {
                    ts.Debug.assert(child.pos > position);
                    // We're now at a node that is entirely past the position we're searching for.
                    // This node (and all following nodes) could never contribute to the result,
                    // so just skip them by returning 'true' here.
                    return true;
                }
            }
        }
        function checkChangeRange(sourceFile, newText, textChangeRange, aggressiveChecks) {
            var oldText = sourceFile.text;
            if (textChangeRange) {
                ts.Debug.assert((oldText.length - textChangeRange.span.length + textChangeRange.newLength) === newText.length);
                if (aggressiveChecks || ts.Debug.shouldAssert(3 /* VeryAggressive */)) {
                    var oldTextPrefix = oldText.substr(0, textChangeRange.span.start);
                    var newTextPrefix = newText.substr(0, textChangeRange.span.start);
                    ts.Debug.assert(oldTextPrefix === newTextPrefix);
                    var oldTextSuffix = oldText.substring(ts.textSpanEnd(textChangeRange.span), oldText.length);
                    var newTextSuffix = newText.substring(ts.textSpanEnd(ts.textChangeRangeNewSpan(textChangeRange)), newText.length);
                    ts.Debug.assert(oldTextSuffix === newTextSuffix);
                }
            }
        }
        function createSyntaxCursor(sourceFile) {
            var currentArray = sourceFile.statements;
            var currentArrayIndex = 0;
            ts.Debug.assert(currentArrayIndex < currentArray.length);
            var current = currentArray[currentArrayIndex];
            var lastQueriedPosition = -1 /* Value */;
            return {
                currentNode: function (position) {
                    // Only compute the current node if the position is different than the last time
                    // we were asked.  The parser commonly asks for the node at the same position
                    // twice.  Once to know if can read an appropriate list element at a certain point,
                    // and then to actually read and consume the node.
                    if (position !== lastQueriedPosition) {
                        // Much of the time the parser will need the very next node in the array that
                        // we just returned a node from.So just simply check for that case and move
                        // forward in the array instead of searching for the node again.
                        if (current && current.end === position && currentArrayIndex < (currentArray.length - 1)) {
                            currentArrayIndex++;
                            current = currentArray[currentArrayIndex];
                        }
                        // If we don't have a node, or the node we have isn't in the right position,
                        // then try to find a viable node at the position requested.
                        if (!current || current.pos !== position) {
                            findHighestListElementThatStartsAtPosition(position);
                        }
                    }
                    // Cache this query so that we don't do any extra work if the parser calls back
                    // into us.  Note: this is very common as the parser will make pairs of calls like
                    // 'isListElement -> parseListElement'.  If we were unable to find a node when
                    // called with 'isListElement', we don't want to redo the work when parseListElement
                    // is called immediately after.
                    lastQueriedPosition = position;
                    // Either we don'd have a node, or we have a node at the position being asked for.
                    ts.Debug.assert(!current || current.pos === position);
                    return current;
                }
            };
            // Finds the highest element in the tree we can find that starts at the provided position.
            // The element must be a direct child of some node list in the tree.  This way after we
            // return it, we can easily return its next sibling in the list.
            function findHighestListElementThatStartsAtPosition(position) {
                // Clear out any cached state about the last node we found.
                currentArray = undefined;
                currentArrayIndex = -1 /* Value */;
                current = undefined;
                // Recurse into the source file to find the highest node at this position.
                forEachChild(sourceFile, visitNode, visitArray);
                return;
                function visitNode(node) {
                    if (position >= node.pos && position < node.end) {
                        // Position was within this node.  Keep searching deeper to find the node.
                        forEachChild(node, visitNode, visitArray);
                        // don't proceed any further in the search.
                        return true;
                    }
                    // position wasn't in this node, have to keep searching.
                    return false;
                }
                function visitArray(array) {
                    if (position >= array.pos && position < array.end) {
                        // position was in this array.  Search through this array to see if we find a
                        // viable element.
                        for (var i = 0; i < array.length; i++) {
                            var child = array[i];
                            if (child) {
                                if (child.pos === position) {
                                    // Found the right node.  We're done.
                                    currentArray = array;
                                    currentArrayIndex = i;
                                    current = child;
                                    return true;
                                }
                                else {
                                    if (child.pos < position && position < child.end) {
                                        // Position in somewhere within this child.  Search in it and
                                        // stop searching in this array.
                                        forEachChild(child, visitNode, visitArray);
                                        return true;
                                    }
                                }
                            }
                        }
                    }
                    // position wasn't in this array, have to keep searching.
                    return false;
                }
            }
        }
        var InvalidPosition;
        (function (InvalidPosition) {
            InvalidPosition[InvalidPosition["Value"] = -1] = "Value";
        })(InvalidPosition || (InvalidPosition = {}));
    })(IncrementalParser || (IncrementalParser = {}));
    function isDeclarationFileName(fileName) {
        return ts.fileExtensionIs(fileName, ".d.ts" /* Dts */);
    }
    /*@internal*/
    function processCommentPragmas(context, sourceText) {
        var triviaScanner = ts.createScanner(context.languageVersion, /*skipTrivia*/ false, 0 /* Standard */, sourceText);
        var pragmas = [];
        // Keep scanning all the leading trivia in the file until we get to something that
        // isn't trivia.  Any single line comment will be analyzed to see if it is a
        // reference comment.
        while (true) {
            var kind = triviaScanner.scan();
            if (!ts.isTrivia(kind)) {
                break;
            }
            var range = {
                kind: triviaScanner.getToken(),
                pos: triviaScanner.getTokenPos(),
                end: triviaScanner.getTextPos(),
            };
            var comment = sourceText.substring(range.pos, range.end);
            extractPragmas(pragmas, range, comment);
        }
        context.pragmas = ts.createMap();
        for (var _i = 0, pragmas_1 = pragmas; _i < pragmas_1.length; _i++) {
            var pragma = pragmas_1[_i];
            if (context.pragmas.has(pragma.name)) { // TODO: GH#18217
                var currentValue = context.pragmas.get(pragma.name);
                if (currentValue instanceof Array) {
                    currentValue.push(pragma.args);
                }
                else {
                    context.pragmas.set(pragma.name, [currentValue, pragma.args]);
                }
                continue;
            }
            context.pragmas.set(pragma.name, pragma.args);
        }
    }
    ts.processCommentPragmas = processCommentPragmas;
    /*@internal*/
    function processPragmasIntoFields(context, reportDiagnostic) {
        context.checkJsDirective = undefined;
        context.referencedFiles = [];
        context.typeReferenceDirectives = [];
        context.libReferenceDirectives = [];
        context.amdDependencies = [];
        context.hasNoDefaultLib = false;
        context.pragmas.forEach(function (entryOrList, key) {
            // TODO: The below should be strongly type-guarded and not need casts/explicit annotations, since entryOrList is related to
            // key and key is constrained to a union; but it's not (see GH#21483 for at least partial fix) :(
            switch (key) {
                case "reference": {
                    var referencedFiles_1 = context.referencedFiles;
                    var typeReferenceDirectives_1 = context.typeReferenceDirectives;
                    var libReferenceDirectives_1 = context.libReferenceDirectives;
                    ts.forEach(ts.toArray(entryOrList), function (arg) {
                        // TODO: GH#18217
                        if (arg.arguments["no-default-lib"]) {
                            context.hasNoDefaultLib = true;
                        }
                        else if (arg.arguments.types) {
                            typeReferenceDirectives_1.push({ pos: arg.arguments.types.pos, end: arg.arguments.types.end, fileName: arg.arguments.types.value });
                        }
                        else if (arg.arguments.lib) {
                            libReferenceDirectives_1.push({ pos: arg.arguments.lib.pos, end: arg.arguments.lib.end, fileName: arg.arguments.lib.value });
                        }
                        else if (arg.arguments.path) {
                            referencedFiles_1.push({ pos: arg.arguments.path.pos, end: arg.arguments.path.end, fileName: arg.arguments.path.value });
                        }
                        else {
                            reportDiagnostic(arg.range.pos, arg.range.end - arg.range.pos, ts.Diagnostics.Invalid_reference_directive_syntax);
                        }
                    });
                    break;
                }
                case "amd-dependency": {
                    context.amdDependencies = ts.map(ts.toArray(entryOrList), function (x) { return ({ name: x.arguments.name, path: x.arguments.path }); }); // TODO: GH#18217
                    break;
                }
                case "amd-module": {
                    if (entryOrList instanceof Array) {
                        for (var _i = 0, entryOrList_1 = entryOrList; _i < entryOrList_1.length; _i++) {
                            var entry = entryOrList_1[_i];
                            if (context.moduleName) {
                                // TODO: It's probably fine to issue this diagnostic on all instances of the pragma
                                reportDiagnostic(entry.range.pos, entry.range.end - entry.range.pos, ts.Diagnostics.An_AMD_module_cannot_have_multiple_name_assignments);
                            }
                            context.moduleName = entry.arguments.name;
                        }
                    }
                    else {
                        context.moduleName = entryOrList.arguments.name;
                    }
                    break;
                }
                case "ts-nocheck":
                case "ts-check": {
                    // _last_ of either nocheck or check in a file is the "winner"
                    ts.forEach(ts.toArray(entryOrList), function (entry) {
                        if (!context.checkJsDirective || entry.range.pos > context.checkJsDirective.pos) { // TODO: GH#18217
                            context.checkJsDirective = {
                                enabled: key === "ts-check",
                                end: entry.range.end,
                                pos: entry.range.pos
                            };
                        }
                    });
                    break;
                }
                case "jsx": return; // Accessed directly
                default: ts.Debug.fail("Unhandled pragma kind"); // Can this be made into an assertNever in the future?
            }
        });
    }
    ts.processPragmasIntoFields = processPragmasIntoFields;
    var namedArgRegExCache = ts.createMap();
    function getNamedArgRegEx(name) {
        if (namedArgRegExCache.has(name)) {
            return namedArgRegExCache.get(name);
        }
        var result = new RegExp("(\\s" + name + "\\s*=\\s*)('|\")(.+?)\\2", "im");
        namedArgRegExCache.set(name, result);
        return result;
    }
    var tripleSlashXMLCommentStartRegEx = /^\/\/\/\s*<(\S+)\s.*?\/>/im;
    var singleLinePragmaRegEx = /^\/\/\/?\s*@(\S+)\s*(.*)\s*$/im;
    function extractPragmas(pragmas, range, text) {
        var tripleSlash = range.kind === 2 /* SingleLineCommentTrivia */ && tripleSlashXMLCommentStartRegEx.exec(text);
        if (tripleSlash) {
            var name = tripleSlash[1].toLowerCase(); // Technically unsafe cast, but we do it so the below check to make it safe typechecks
            var pragma = ts.commentPragmas[name];
            if (!pragma || !(pragma.kind & 1 /* TripleSlashXML */)) {
                return;
            }
            if (pragma.args) {
                var argument = {};
                for (var _i = 0, _a = pragma.args; _i < _a.length; _i++) {
                    var arg = _a[_i];
                    var matcher = getNamedArgRegEx(arg.name);
                    var matchResult = matcher.exec(text);
                    if (!matchResult && !arg.optional) {
                        return; // Missing required argument, don't parse
                    }
                    else if (matchResult) {
                        if (arg.captureSpan) {
                            var startPos = range.pos + matchResult.index + matchResult[1].length + matchResult[2].length;
                            argument[arg.name] = {
                                value: matchResult[3],
                                pos: startPos,
                                end: startPos + matchResult[3].length
                            };
                        }
                        else {
                            argument[arg.name] = matchResult[3];
                        }
                    }
                }
                pragmas.push({ name: name, args: { arguments: argument, range: range } });
            }
            else {
                pragmas.push({ name: name, args: { arguments: {}, range: range } });
            }
            return;
        }
        var singleLine = range.kind === 2 /* SingleLineCommentTrivia */ && singleLinePragmaRegEx.exec(text);
        if (singleLine) {
            return addPragmaForMatch(pragmas, range, 2 /* SingleLine */, singleLine);
        }
        if (range.kind === 3 /* MultiLineCommentTrivia */) {
            var multiLinePragmaRegEx = /\s*@(\S+)\s*(.*)\s*$/gim; // Defined inline since it uses the "g" flag, which keeps a persistent index (for iterating)
            var multiLineMatch = void 0;
            while (multiLineMatch = multiLinePragmaRegEx.exec(text)) {
                addPragmaForMatch(pragmas, range, 4 /* MultiLine */, multiLineMatch);
            }
        }
    }
    function addPragmaForMatch(pragmas, range, kind, match) {
        if (!match)
            return;
        var name = match[1].toLowerCase(); // Technically unsafe cast, but we do it so they below check to make it safe typechecks
        var pragma = ts.commentPragmas[name];
        if (!pragma || !(pragma.kind & kind)) {
            return;
        }
        var args = match[2]; // Split on spaces and match up positionally with definition
        var argument = getNamedPragmaArguments(pragma, args);
        if (argument === "fail")
            return; // Missing required argument, fail to parse it
        pragmas.push({ name: name, args: { arguments: argument, range: range } });
        return;
    }
    function getNamedPragmaArguments(pragma, text) {
        if (!text)
            return {};
        if (!pragma.args)
            return {};
        var args = text.split(/\s+/);
        var argMap = {};
        for (var i = 0; i < pragma.args.length; i++) {
            var argument = pragma.args[i];
            if (!args[i] && !argument.optional) {
                return "fail";
            }
            if (argument.captureSpan) {
                return ts.Debug.fail("Capture spans not yet implemented for non-xml pragmas");
            }
            argMap[argument.name] = args[i];
        }
        return argMap;
    }
    /** @internal */
    function tagNamesAreEquivalent(lhs, rhs) {
        if (lhs.kind !== rhs.kind) {
            return false;
        }
        if (lhs.kind === 71 /* Identifier */) {
            return lhs.escapedText === rhs.escapedText;
        }
        if (lhs.kind === 99 /* ThisKeyword */) {
            return true;
        }
        // If we are at this statement then we must have PropertyAccessExpression and because tag name in Jsx element can only
        // take forms of JsxTagNameExpression which includes an identifier, "this" expression, or another propertyAccessExpression
        // it is safe to case the expression property as such. See parseJsxElementName for how we parse tag name in Jsx element
        return lhs.name.escapedText === rhs.name.escapedText &&
            tagNamesAreEquivalent(lhs.expression, rhs.expression);
    }
    ts.tagNamesAreEquivalent = tagNamesAreEquivalent;
})(ts || (ts = {}));
var ts;
(function (ts) {
    /* @internal */
    ts.compileOnSaveCommandLineOption = { name: "compileOnSave", type: "boolean" };
    // NOTE: The order here is important to default lib ordering as entries will have the same
    //       order in the generated program (see `getDefaultLibPriority` in program.ts). This
    //       order also affects overload resolution when a type declared in one lib is
    //       augmented in another lib.
    var libEntries = [
        // JavaScript only
        ["es5", "lib.es5.d.ts"],
        ["es6", "lib.es2015.d.ts"],
        ["es2015", "lib.es2015.d.ts"],
        ["es7", "lib.es2016.d.ts"],
        ["es2016", "lib.es2016.d.ts"],
        ["es2017", "lib.es2017.d.ts"],
        ["es2018", "lib.es2018.d.ts"],
        ["esnext", "lib.esnext.d.ts"],
        // Host only
        ["dom", "lib.dom.d.ts"],
        ["dom.iterable", "lib.dom.iterable.d.ts"],
        ["webworker", "lib.webworker.d.ts"],
        ["webworker.importscripts", "lib.webworker.importscripts.d.ts"],
        ["scripthost", "lib.scripthost.d.ts"],
        // ES2015 Or ESNext By-feature options
        ["es2015.core", "lib.es2015.core.d.ts"],
        ["es2015.collection", "lib.es2015.collection.d.ts"],
        ["es2015.generator", "lib.es2015.generator.d.ts"],
        ["es2015.iterable", "lib.es2015.iterable.d.ts"],
        ["es2015.promise", "lib.es2015.promise.d.ts"],
        ["es2015.proxy", "lib.es2015.proxy.d.ts"],
        ["es2015.reflect", "lib.es2015.reflect.d.ts"],
        ["es2015.symbol", "lib.es2015.symbol.d.ts"],
        ["es2015.symbol.wellknown", "lib.es2015.symbol.wellknown.d.ts"],
        ["es2016.array.include", "lib.es2016.array.include.d.ts"],
        ["es2017.object", "lib.es2017.object.d.ts"],
        ["es2017.sharedmemory", "lib.es2017.sharedmemory.d.ts"],
        ["es2017.string", "lib.es2017.string.d.ts"],
        ["es2017.intl", "lib.es2017.intl.d.ts"],
        ["es2017.typedarrays", "lib.es2017.typedarrays.d.ts"],
        ["es2018.intl", "lib.es2018.intl.d.ts"],
        ["es2018.promise", "lib.es2018.promise.d.ts"],
        ["es2018.regexp", "lib.es2018.regexp.d.ts"],
        ["esnext.array", "lib.esnext.array.d.ts"],
        ["esnext.symbol", "lib.esnext.symbol.d.ts"],
        ["esnext.asynciterable", "lib.esnext.asynciterable.d.ts"],
    ];
    /**
     * An array of supported "lib" reference file names used to determine the order for inclusion
     * when referenced, as well as for spelling suggestions. This ensures the correct ordering for
     * overload resolution when a type declared in one lib is extended by another.
     */
    /* @internal */
    ts.libs = libEntries.map(function (entry) { return entry[0]; });
    /**
     * A map of lib names to lib files. This map is used both for parsing the "lib" command line
     * option as well as for resolving lib reference directives.
     */
    /* @internal */
    ts.libMap = ts.createMapFromEntries(libEntries);
    /* @internal */
    ts.optionDeclarations = [
        // CommandLine only options
        {
            name: "help",
            shortName: "h",
            type: "boolean",
            showInSimplifiedHelpView: true,
            category: ts.Diagnostics.Command_line_Options,
            description: ts.Diagnostics.Print_this_message,
        },
        {
            name: "help",
            shortName: "?",
            type: "boolean"
        },
        {
            name: "all",
            type: "boolean",
            showInSimplifiedHelpView: true,
            category: ts.Diagnostics.Command_line_Options,
            description: ts.Diagnostics.Show_all_compiler_options,
        },
        {
            name: "version",
            shortName: "v",
            type: "boolean",
            showInSimplifiedHelpView: true,
            category: ts.Diagnostics.Command_line_Options,
            description: ts.Diagnostics.Print_the_compiler_s_version,
        },
        {
            name: "init",
            type: "boolean",
            showInSimplifiedHelpView: true,
            category: ts.Diagnostics.Command_line_Options,
            description: ts.Diagnostics.Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file,
        },
        {
            name: "project",
            shortName: "p",
            type: "string",
            isFilePath: true,
            showInSimplifiedHelpView: true,
            category: ts.Diagnostics.Command_line_Options,
            paramType: ts.Diagnostics.FILE_OR_DIRECTORY,
            description: ts.Diagnostics.Compile_the_project_given_the_path_to_its_configuration_file_or_to_a_folder_with_a_tsconfig_json,
        },
        {
            name: "build",
            type: "boolean",
            shortName: "b",
            showInSimplifiedHelpView: true,
            category: ts.Diagnostics.Command_line_Options,
            description: ts.Diagnostics.Build_one_or_more_projects_and_their_dependencies_if_out_of_date
        },
        {
            name: "pretty",
            type: "boolean",
            showInSimplifiedHelpView: true,
            category: ts.Diagnostics.Command_line_Options,
            description: ts.Diagnostics.Stylize_errors_and_messages_using_color_and_context_experimental
        },
        {
            name: "preserveWatchOutput",
            type: "boolean",
            showInSimplifiedHelpView: false,
            category: ts.Diagnostics.Command_line_Options,
            description: ts.Diagnostics.Whether_to_keep_outdated_console_output_in_watch_mode_instead_of_clearing_the_screen,
        },
        {
            name: "watch",
            shortName: "w",
            type: "boolean",
            showInSimplifiedHelpView: true,
            category: ts.Diagnostics.Command_line_Options,
            description: ts.Diagnostics.Watch_input_files,
        },
        // Basic
        {
            name: "target",
            shortName: "t",
            type: ts.createMapFromTemplate({
                es3: 0 /* ES3 */,
                es5: 1 /* ES5 */,
                es6: 2 /* ES2015 */,
                es2015: 2 /* ES2015 */,
                es2016: 3 /* ES2016 */,
                es2017: 4 /* ES2017 */,
                es2018: 5 /* ES2018 */,
                esnext: 6 /* ESNext */,
            }),
            paramType: ts.Diagnostics.VERSION,
            showInSimplifiedHelpView: true,
            category: ts.Diagnostics.Basic_Options,
            description: ts.Diagnostics.Specify_ECMAScript_target_version_Colon_ES3_default_ES5_ES2015_ES2016_ES2017_ES2018_or_ESNEXT,
        },
        {
            name: "module",
            shortName: "m",
            type: ts.createMapFromTemplate({
                none: ts.ModuleKind.None,
                commonjs: ts.ModuleKind.CommonJS,
                amd: ts.ModuleKind.AMD,
                system: ts.ModuleKind.System,
                umd: ts.ModuleKind.UMD,
                es6: ts.ModuleKind.ES2015,
                es2015: ts.ModuleKind.ES2015,
                esnext: ts.ModuleKind.ESNext
            }),
            paramType: ts.Diagnostics.KIND,
            showInSimplifiedHelpView: true,
            category: ts.Diagnostics.Basic_Options,
            description: ts.Diagnostics.Specify_module_code_generation_Colon_none_commonjs_amd_system_umd_es2015_or_ESNext,
        },
        {
            name: "lib",
            type: "list",
            element: {
                name: "lib",
                type: ts.libMap
            },
            showInSimplifiedHelpView: true,
            category: ts.Diagnostics.Basic_Options,
            description: ts.Diagnostics.Specify_library_files_to_be_included_in_the_compilation
        },
        {
            name: "allowJs",
            type: "boolean",
            showInSimplifiedHelpView: true,
            category: ts.Diagnostics.Basic_Options,
            description: ts.Diagnostics.Allow_javascript_files_to_be_compiled
        },
        {
            name: "checkJs",
            type: "boolean",
            category: ts.Diagnostics.Basic_Options,
            description: ts.Diagnostics.Report_errors_in_js_files
        },
        {
            name: "jsx",
            type: ts.createMapFromTemplate({
                "preserve": 1 /* Preserve */,
                "react-native": 3 /* ReactNative */,
                "react": 2 /* React */
            }),
            paramType: ts.Diagnostics.KIND,
            showInSimplifiedHelpView: true,
            category: ts.Diagnostics.Basic_Options,
            description: ts.Diagnostics.Specify_JSX_code_generation_Colon_preserve_react_native_or_react,
        },
        {
            name: "declaration",
            shortName: "d",
            type: "boolean",
            showInSimplifiedHelpView: true,
            category: ts.Diagnostics.Basic_Options,
            description: ts.Diagnostics.Generates_corresponding_d_ts_file,
        },
        {
            name: "declarationMap",
            type: "boolean",
            showInSimplifiedHelpView: true,
            category: ts.Diagnostics.Basic_Options,
            description: ts.Diagnostics.Generates_a_sourcemap_for_each_corresponding_d_ts_file,
        },
        {
            name: "emitDeclarationOnly",
            type: "boolean",
            category: ts.Diagnostics.Advanced_Options,
            description: ts.Diagnostics.Only_emit_d_ts_declaration_files,
        },
        {
            name: "sourceMap",
            type: "boolean",
            showInSimplifiedHelpView: true,
            category: ts.Diagnostics.Basic_Options,
            description: ts.Diagnostics.Generates_corresponding_map_file,
        },
        {
            name: "outFile",
            type: "string",
            isFilePath: true,
            paramType: ts.Diagnostics.FILE,
            showInSimplifiedHelpView: true,
            category: ts.Diagnostics.Basic_Options,
            description: ts.Diagnostics.Concatenate_and_emit_output_to_single_file,
        },
        {
            name: "outDir",
            type: "string",
            isFilePath: true,
            paramType: ts.Diagnostics.DIRECTORY,
            showInSimplifiedHelpView: true,
            category: ts.Diagnostics.Basic_Options,
            description: ts.Diagnostics.Redirect_output_structure_to_the_directory,
        },
        {
            name: "rootDir",
            type: "string",
            isFilePath: true,
            paramType: ts.Diagnostics.LOCATION,
            category: ts.Diagnostics.Basic_Options,
            description: ts.Diagnostics.Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir,
        },
        {
            name: "composite",
            type: "boolean",
            isTSConfigOnly: true,
            category: ts.Diagnostics.Basic_Options,
            description: ts.Diagnostics.Enable_project_compilation,
        },
        {
            name: "removeComments",
            type: "boolean",
            showInSimplifiedHelpView: true,
            category: ts.Diagnostics.Basic_Options,
            description: ts.Diagnostics.Do_not_emit_comments_to_output,
        },
        {
            name: "noEmit",
            type: "boolean",
            showInSimplifiedHelpView: true,
            category: ts.Diagnostics.Basic_Options,
            description: ts.Diagnostics.Do_not_emit_outputs,
        },
        {
            name: "importHelpers",
            type: "boolean",
            category: ts.Diagnostics.Basic_Options,
            description: ts.Diagnostics.Import_emit_helpers_from_tslib
        },
        {
            name: "downlevelIteration",
            type: "boolean",
            category: ts.Diagnostics.Basic_Options,
            description: ts.Diagnostics.Provide_full_support_for_iterables_in_for_of_spread_and_destructuring_when_targeting_ES5_or_ES3
        },
        {
            name: "isolatedModules",
            type: "boolean",
            category: ts.Diagnostics.Basic_Options,
            description: ts.Diagnostics.Transpile_each_file_as_a_separate_module_similar_to_ts_transpileModule
        },
        // Strict Type Checks
        {
            name: "strict",
            type: "boolean",
            showInSimplifiedHelpView: true,
            category: ts.Diagnostics.Strict_Type_Checking_Options,
            description: ts.Diagnostics.Enable_all_strict_type_checking_options
        },
        {
            name: "noImplicitAny",
            type: "boolean",
            showInSimplifiedHelpView: true,
            category: ts.Diagnostics.Strict_Type_Checking_Options,
            description: ts.Diagnostics.Raise_error_on_expressions_and_declarations_with_an_implied_any_type,
        },
        {
            name: "strictNullChecks",
            type: "boolean",
            showInSimplifiedHelpView: true,
            category: ts.Diagnostics.Strict_Type_Checking_Options,
            description: ts.Diagnostics.Enable_strict_null_checks
        },
        {
            name: "strictFunctionTypes",
            type: "boolean",
            showInSimplifiedHelpView: true,
            category: ts.Diagnostics.Strict_Type_Checking_Options,
            description: ts.Diagnostics.Enable_strict_checking_of_function_types
        },
        {
            name: "strictPropertyInitialization",
            type: "boolean",
            showInSimplifiedHelpView: true,
            category: ts.Diagnostics.Strict_Type_Checking_Options,
            description: ts.Diagnostics.Enable_strict_checking_of_property_initialization_in_classes
        },
        {
            name: "noImplicitThis",
            type: "boolean",
            showInSimplifiedHelpView: true,
            category: ts.Diagnostics.Strict_Type_Checking_Options,
            description: ts.Diagnostics.Raise_error_on_this_expressions_with_an_implied_any_type,
        },
        {
            name: "alwaysStrict",
            type: "boolean",
            showInSimplifiedHelpView: true,
            category: ts.Diagnostics.Strict_Type_Checking_Options,
            description: ts.Diagnostics.Parse_in_strict_mode_and_emit_use_strict_for_each_source_file
        },
        // Additional Checks
        {
            name: "noUnusedLocals",
            type: "boolean",
            showInSimplifiedHelpView: true,
            category: ts.Diagnostics.Additional_Checks,
            description: ts.Diagnostics.Report_errors_on_unused_locals,
        },
        {
            name: "noUnusedParameters",
            type: "boolean",
            showInSimplifiedHelpView: true,
            category: ts.Diagnostics.Additional_Checks,
            description: ts.Diagnostics.Report_errors_on_unused_parameters,
        },
        {
            name: "noImplicitReturns",
            type: "boolean",
            showInSimplifiedHelpView: true,
            category: ts.Diagnostics.Additional_Checks,
            description: ts.Diagnostics.Report_error_when_not_all_code_paths_in_function_return_a_value
        },
        {
            name: "noFallthroughCasesInSwitch",
            type: "boolean",
            showInSimplifiedHelpView: true,
            category: ts.Diagnostics.Additional_Checks,
            description: ts.Diagnostics.Report_errors_for_fallthrough_cases_in_switch_statement
        },
        // Module Resolution
        {
            name: "moduleResolution",
            type: ts.createMapFromTemplate({
                node: ts.ModuleResolutionKind.NodeJs,
                classic: ts.ModuleResolutionKind.Classic,
            }),
            paramType: ts.Diagnostics.STRATEGY,
            category: ts.Diagnostics.Module_Resolution_Options,
            description: ts.Diagnostics.Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6,
        },
        {
            name: "baseUrl",
            type: "string",
            isFilePath: true,
            category: ts.Diagnostics.Module_Resolution_Options,
            description: ts.Diagnostics.Base_directory_to_resolve_non_absolute_module_names
        },
        {
            // this option can only be specified in tsconfig.json
            // use type = object to copy the value as-is
            name: "paths",
            type: "object",
            isTSConfigOnly: true,
            category: ts.Diagnostics.Module_Resolution_Options,
            description: ts.Diagnostics.A_series_of_entries_which_re_map_imports_to_lookup_locations_relative_to_the_baseUrl
        },
        {
            // this option can only be specified in tsconfig.json
            // use type = object to copy the value as-is
            name: "rootDirs",
            type: "list",
            isTSConfigOnly: true,
            element: {
                name: "rootDirs",
                type: "string",
                isFilePath: true
            },
            category: ts.Diagnostics.Module_Resolution_Options,
            description: ts.Diagnostics.List_of_root_folders_whose_combined_content_represents_the_structure_of_the_project_at_runtime
        },
        {
            name: "typeRoots",
            type: "list",
            element: {
                name: "typeRoots",
                type: "string",
                isFilePath: true
            },
            category: ts.Diagnostics.Module_Resolution_Options,
            description: ts.Diagnostics.List_of_folders_to_include_type_definitions_from
        },
        {
            name: "types",
            type: "list",
            element: {
                name: "types",
                type: "string"
            },
            showInSimplifiedHelpView: true,
            category: ts.Diagnostics.Module_Resolution_Options,
            description: ts.Diagnostics.Type_declaration_files_to_be_included_in_compilation
        },
        {
            name: "allowSyntheticDefaultImports",
            type: "boolean",
            category: ts.Diagnostics.Module_Resolution_Options,
            description: ts.Diagnostics.Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typechecking
        },
        {
            name: "esModuleInterop",
            type: "boolean",
            showInSimplifiedHelpView: true,
            category: ts.Diagnostics.Module_Resolution_Options,
            description: ts.Diagnostics.Enables_emit_interoperability_between_CommonJS_and_ES_Modules_via_creation_of_namespace_objects_for_all_imports_Implies_allowSyntheticDefaultImports
        },
        {
            name: "preserveSymlinks",
            type: "boolean",
            category: ts.Diagnostics.Module_Resolution_Options,
            description: ts.Diagnostics.Do_not_resolve_the_real_path_of_symlinks,
        },
        // Source Maps
        {
            name: "sourceRoot",
            type: "string",
            isFilePath: true,
            paramType: ts.Diagnostics.LOCATION,
            category: ts.Diagnostics.Source_Map_Options,
            description: ts.Diagnostics.Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations,
        },
        {
            name: "mapRoot",
            type: "string",
            isFilePath: true,
            paramType: ts.Diagnostics.LOCATION,
            category: ts.Diagnostics.Source_Map_Options,
            description: ts.Diagnostics.Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations,
        },
        {
            name: "inlineSourceMap",
            type: "boolean",
            category: ts.Diagnostics.Source_Map_Options,
            description: ts.Diagnostics.Emit_a_single_file_with_source_maps_instead_of_having_a_separate_file
        },
        {
            name: "inlineSources",
            type: "boolean",
            category: ts.Diagnostics.Source_Map_Options,
            description: ts.Diagnostics.Emit_the_source_alongside_the_sourcemaps_within_a_single_file_requires_inlineSourceMap_or_sourceMap_to_be_set
        },
        // Experimental
        {
            name: "experimentalDecorators",
            type: "boolean",
            category: ts.Diagnostics.Experimental_Options,
            description: ts.Diagnostics.Enables_experimental_support_for_ES7_decorators
        },
        {
            name: "emitDecoratorMetadata",
            type: "boolean",
            category: ts.Diagnostics.Experimental_Options,
            description: ts.Diagnostics.Enables_experimental_support_for_emitting_type_metadata_for_decorators
        },
        // Advanced
        {
            name: "jsxFactory",
            type: "string",
            category: ts.Diagnostics.Advanced_Options,
            description: ts.Diagnostics.Specify_the_JSX_factory_function_to_use_when_targeting_react_JSX_emit_e_g_React_createElement_or_h
        },
        {
            name: "diagnostics",
            type: "boolean",
            category: ts.Diagnostics.Advanced_Options,
            description: ts.Diagnostics.Show_diagnostic_information
        },
        {
            name: "extendedDiagnostics",
            type: "boolean",
            category: ts.Diagnostics.Advanced_Options,
            description: ts.Diagnostics.Show_verbose_diagnostic_information
        },
        {
            name: "traceResolution",
            type: "boolean",
            category: ts.Diagnostics.Advanced_Options,
            description: ts.Diagnostics.Enable_tracing_of_the_name_resolution_process
        },
        {
            name: "resolveJsonModule",
            type: "boolean",
            category: ts.Diagnostics.Advanced_Options,
            description: ts.Diagnostics.Include_modules_imported_with_json_extension
        },
        {
            name: "listFiles",
            type: "boolean",
            category: ts.Diagnostics.Advanced_Options,
            description: ts.Diagnostics.Print_names_of_files_part_of_the_compilation
        },
        {
            name: "listEmittedFiles",
            type: "boolean",
            category: ts.Diagnostics.Advanced_Options,
            description: ts.Diagnostics.Print_names_of_generated_files_part_of_the_compilation
        },
        {
            name: "out",
            type: "string",
            isFilePath: false,
            // for correct behaviour, please use outFile
            category: ts.Diagnostics.Advanced_Options,
            paramType: ts.Diagnostics.FILE,
            description: ts.Diagnostics.Deprecated_Use_outFile_instead_Concatenate_and_emit_output_to_single_file,
        },
        {
            name: "reactNamespace",
            type: "string",
            category: ts.Diagnostics.Advanced_Options,
            description: ts.Diagnostics.Deprecated_Use_jsxFactory_instead_Specify_the_object_invoked_for_createElement_when_targeting_react_JSX_emit
        },
        {
            name: "skipDefaultLibCheck",
            type: "boolean",
            category: ts.Diagnostics.Advanced_Options,
            description: ts.Diagnostics.Deprecated_Use_skipLibCheck_instead_Skip_type_checking_of_default_library_declaration_files
        },
        {
            name: "charset",
            type: "string",
            category: ts.Diagnostics.Advanced_Options,
            description: ts.Diagnostics.The_character_set_of_the_input_files
        },
        {
            name: "emitBOM",
            type: "boolean",
            category: ts.Diagnostics.Advanced_Options,
            description: ts.Diagnostics.Emit_a_UTF_8_Byte_Order_Mark_BOM_in_the_beginning_of_output_files
        },
        {
            name: "locale",
            type: "string",
            category: ts.Diagnostics.Advanced_Options,
            description: ts.Diagnostics.The_locale_used_when_displaying_messages_to_the_user_e_g_en_us
        },
        {
            name: "newLine",
            type: ts.createMapFromTemplate({
                crlf: 0 /* CarriageReturnLineFeed */,
                lf: 1 /* LineFeed */
            }),
            paramType: ts.Diagnostics.NEWLINE,
            category: ts.Diagnostics.Advanced_Options,
            description: ts.Diagnostics.Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix,
        },
        {
            name: "noErrorTruncation",
            type: "boolean",
            category: ts.Diagnostics.Advanced_Options,
            description: ts.Diagnostics.Do_not_truncate_error_messages
        },
        {
            name: "noLib",
            type: "boolean",
            category: ts.Diagnostics.Advanced_Options,
            description: ts.Diagnostics.Do_not_include_the_default_library_file_lib_d_ts
        },
        {
            name: "noResolve",
            type: "boolean",
            category: ts.Diagnostics.Advanced_Options,
            description: ts.Diagnostics.Do_not_add_triple_slash_references_or_imported_modules_to_the_list_of_compiled_files
        },
        {
            name: "stripInternal",
            type: "boolean",
            category: ts.Diagnostics.Advanced_Options,
            description: ts.Diagnostics.Do_not_emit_declarations_for_code_that_has_an_internal_annotation,
        },
        {
            name: "disableSizeLimit",
            type: "boolean",
            category: ts.Diagnostics.Advanced_Options,
            description: ts.Diagnostics.Disable_size_limitations_on_JavaScript_projects
        },
        {
            name: "noImplicitUseStrict",
            type: "boolean",
            category: ts.Diagnostics.Advanced_Options,
            description: ts.Diagnostics.Do_not_emit_use_strict_directives_in_module_output
        },
        {
            name: "noEmitHelpers",
            type: "boolean",
            category: ts.Diagnostics.Advanced_Options,
            description: ts.Diagnostics.Do_not_generate_custom_helper_functions_like_extends_in_compiled_output
        },
        {
            name: "noEmitOnError",
            type: "boolean",
            category: ts.Diagnostics.Advanced_Options,
            description: ts.Diagnostics.Do_not_emit_outputs_if_any_errors_were_reported,
        },
        {
            name: "preserveConstEnums",
            type: "boolean",
            category: ts.Diagnostics.Advanced_Options,
            description: ts.Diagnostics.Do_not_erase_const_enum_declarations_in_generated_code
        },
        {
            name: "declarationDir",
            type: "string",
            isFilePath: true,
            paramType: ts.Diagnostics.DIRECTORY,
            category: ts.Diagnostics.Advanced_Options,
            description: ts.Diagnostics.Output_directory_for_generated_declaration_files
        },
        {
            name: "skipLibCheck",
            type: "boolean",
            category: ts.Diagnostics.Advanced_Options,
            description: ts.Diagnostics.Skip_type_checking_of_declaration_files,
        },
        {
            name: "allowUnusedLabels",
            type: "boolean",
            category: ts.Diagnostics.Advanced_Options,
            description: ts.Diagnostics.Do_not_report_errors_on_unused_labels
        },
        {
            name: "allowUnreachableCode",
            type: "boolean",
            category: ts.Diagnostics.Advanced_Options,
            description: ts.Diagnostics.Do_not_report_errors_on_unreachable_code
        },
        {
            name: "suppressExcessPropertyErrors",
            type: "boolean",
            category: ts.Diagnostics.Advanced_Options,
            description: ts.Diagnostics.Suppress_excess_property_checks_for_object_literals,
        },
        {
            name: "suppressImplicitAnyIndexErrors",
            type: "boolean",
            category: ts.Diagnostics.Advanced_Options,
            description: ts.Diagnostics.Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures,
        },
        {
            name: "forceConsistentCasingInFileNames",
            type: "boolean",
            category: ts.Diagnostics.Advanced_Options,
            description: ts.Diagnostics.Disallow_inconsistently_cased_references_to_the_same_file
        },
        {
            name: "maxNodeModuleJsDepth",
            type: "number",
            category: ts.Diagnostics.Advanced_Options,
            description: ts.Diagnostics.The_maximum_dependency_depth_to_search_under_node_modules_and_load_JavaScript_files
        },
        {
            name: "noStrictGenericChecks",
            type: "boolean",
            category: ts.Diagnostics.Advanced_Options,
            description: ts.Diagnostics.Disable_strict_checking_of_generic_signatures_in_function_types,
        },
        {
            name: "keyofStringsOnly",
            type: "boolean",
            category: ts.Diagnostics.Advanced_Options,
            description: ts.Diagnostics.Resolve_keyof_to_string_valued_property_names_only_no_numbers_or_symbols,
        },
        {
            // A list of plugins to load in the language service
            name: "plugins",
            type: "list",
            isTSConfigOnly: true,
            element: {
                name: "plugin",
                type: "object"
            },
            description: ts.Diagnostics.List_of_language_service_plugins
        }
    ];
    /* @internal */
    ts.typeAcquisitionDeclarations = [
        {
            /* @deprecated typingOptions.enableAutoDiscovery
             * Use typeAcquisition.enable instead.
             */
            name: "enableAutoDiscovery",
            type: "boolean",
        },
        {
            name: "enable",
            type: "boolean",
        },
        {
            name: "include",
            type: "list",
            element: {
                name: "include",
                type: "string"
            }
        },
        {
            name: "exclude",
            type: "list",
            element: {
                name: "exclude",
                type: "string"
            }
        }
    ];
    /* @internal */
    ts.defaultInitCompilerOptions = {
        module: ts.ModuleKind.CommonJS,
        target: 1 /* ES5 */,
        strict: true,
        esModuleInterop: true
    };
    var optionNameMapCache;
    /* @internal */
    function convertEnableAutoDiscoveryToEnable(typeAcquisition) {
        // Convert deprecated typingOptions.enableAutoDiscovery to typeAcquisition.enable
        if (typeAcquisition && typeAcquisition.enableAutoDiscovery !== undefined && typeAcquisition.enable === undefined) {
            return {
                enable: typeAcquisition.enableAutoDiscovery,
                include: typeAcquisition.include || [],
                exclude: typeAcquisition.exclude || []
            };
        }
        return typeAcquisition;
    }
    ts.convertEnableAutoDiscoveryToEnable = convertEnableAutoDiscoveryToEnable;
    function getOptionNameMap() {
        if (optionNameMapCache) {
            return optionNameMapCache;
        }
        var optionNameMap = ts.createMap();
        var shortOptionNames = ts.createMap();
        ts.forEach(ts.optionDeclarations, function (option) {
            optionNameMap.set(option.name.toLowerCase(), option);
            if (option.shortName) {
                shortOptionNames.set(option.shortName, option.name);
            }
        });
        optionNameMapCache = { optionNameMap: optionNameMap, shortOptionNames: shortOptionNames };
        return optionNameMapCache;
    }
    /* @internal */
    function createCompilerDiagnosticForInvalidCustomType(opt) {
        return createDiagnosticForInvalidCustomType(opt, ts.createCompilerDiagnostic);
    }
    ts.createCompilerDiagnosticForInvalidCustomType = createCompilerDiagnosticForInvalidCustomType;
    function createDiagnosticForInvalidCustomType(opt, createDiagnostic) {
        var namesOfType = ts.arrayFrom(opt.type.keys()).map(function (key) { return "'" + key + "'"; }).join(", ");
        return createDiagnostic(ts.Diagnostics.Argument_for_0_option_must_be_Colon_1, "--" + opt.name, namesOfType);
    }
    /* @internal */
    function parseCustomTypeOption(opt, value, errors) {
        return convertJsonOptionOfCustomType(opt, trimString(value || ""), errors);
    }
    ts.parseCustomTypeOption = parseCustomTypeOption;
    /* @internal */
    function parseListTypeOption(opt, value, errors) {
        if (value === void 0) { value = ""; }
        value = trimString(value);
        if (ts.startsWith(value, "-")) {
            return undefined;
        }
        if (value === "") {
            return [];
        }
        var values = value.split(",");
        switch (opt.element.type) {
            case "number":
                return ts.map(values, parseInt);
            case "string":
                return ts.map(values, function (v) { return v || ""; });
            default:
                return ts.mapDefined(values, function (v) { return parseCustomTypeOption(opt.element, v, errors); });
        }
    }
    ts.parseListTypeOption = parseListTypeOption;
    function parseCommandLine(commandLine, readFile) {
        var options = {};
        var fileNames = [];
        var projectReferences = undefined;
        var errors = [];
        parseStrings(commandLine);
        return {
            options: options,
            fileNames: fileNames,
            projectReferences: projectReferences,
            errors: errors
        };
        function parseStrings(args) {
            var i = 0;
            while (i < args.length) {
                var s = args[i];
                i++;
                if (s.charCodeAt(0) === 64 /* at */) {
                    parseResponseFile(s.slice(1));
                }
                else if (s.charCodeAt(0) === 45 /* minus */) {
                    var opt = getOptionFromName(s.slice(s.charCodeAt(1) === 45 /* minus */ ? 2 : 1), /*allowShort*/ true);
                    if (opt) {
                        if (opt.isTSConfigOnly) {
                            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_can_only_be_specified_in_tsconfig_json_file, opt.name));
                        }
                        else {
                            // Check to see if no argument was provided (e.g. "--locale" is the last command-line argument).
                            if (!args[i] && opt.type !== "boolean") {
                                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_expects_an_argument, opt.name));
                            }
                            switch (opt.type) {
                                case "number":
                                    options[opt.name] = parseInt(args[i]);
                                    i++;
                                    break;
                                case "boolean":
                                    // boolean flag has optional value true, false, others
                                    var optValue = args[i];
                                    options[opt.name] = optValue !== "false";
                                    // consume next argument as boolean flag value
                                    if (optValue === "false" || optValue === "true") {
                                        i++;
                                    }
                                    break;
                                case "string":
                                    options[opt.name] = args[i] || "";
                                    i++;
                                    break;
                                case "list":
                                    var result = parseListTypeOption(opt, args[i], errors);
                                    options[opt.name] = result || [];
                                    if (result) {
                                        i++;
                                    }
                                    break;
                                // If not a primitive, the possible types are specified in what is effectively a map of options.
                                default:
                                    options[opt.name] = parseCustomTypeOption(opt, args[i], errors);
                                    i++;
                                    break;
                            }
                        }
                    }
                    else {
                        errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unknown_compiler_option_0, s));
                    }
                }
                else {
                    fileNames.push(s);
                }
            }
        }
        function parseResponseFile(fileName) {
            var text = readFile ? readFile(fileName) : ts.sys.readFile(fileName);
            if (!text) {
                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.File_0_not_found, fileName));
                return;
            }
            var args = [];
            var pos = 0;
            while (true) {
                while (pos < text.length && text.charCodeAt(pos) <= 32 /* space */)
                    pos++;
                if (pos >= text.length)
                    break;
                var start = pos;
                if (text.charCodeAt(start) === 34 /* doubleQuote */) {
                    pos++;
                    while (pos < text.length && text.charCodeAt(pos) !== 34 /* doubleQuote */)
                        pos++;
                    if (pos < text.length) {
                        args.push(text.substring(start + 1, pos));
                        pos++;
                    }
                    else {
                        errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unterminated_quoted_string_in_response_file_0, fileName));
                    }
                }
                else {
                    while (text.charCodeAt(pos) > 32 /* space */)
                        pos++;
                    args.push(text.substring(start, pos));
                }
            }
            parseStrings(args);
        }
    }
    ts.parseCommandLine = parseCommandLine;
    /** @internal */
    function getOptionFromName(optionName, allowShort) {
        if (allowShort === void 0) { allowShort = false; }
        optionName = optionName.toLowerCase();
        var _a = getOptionNameMap(), optionNameMap = _a.optionNameMap, shortOptionNames = _a.shortOptionNames;
        // Try to translate short option names to their full equivalents.
        if (allowShort) {
            var short = shortOptionNames.get(optionName);
            if (short !== undefined) {
                optionName = short;
            }
        }
        return optionNameMap.get(optionName);
    }
    ts.getOptionFromName = getOptionFromName;
    function getDiagnosticText(_message) {
        var _args = [];
        for (var _i = 1; _i < arguments.length; _i++) {
            _args[_i - 1] = arguments[_i];
        }
        var diagnostic = ts.createCompilerDiagnostic.apply(undefined, arguments);
        return diagnostic.messageText;
    }
    /* @internal */
    function printVersion() {
        ts.sys.write(getDiagnosticText(ts.Diagnostics.Version_0, ts.version) + ts.sys.newLine);
    }
    ts.printVersion = printVersion;
    /* @internal */
    function printHelp(optionsList, syntaxPrefix) {
        if (syntaxPrefix === void 0) { syntaxPrefix = ""; }
        var output = [];
        // We want to align our "syntax" and "examples" commands to a certain margin.
        var syntaxLength = getDiagnosticText(ts.Diagnostics.Syntax_Colon_0, "").length;
        var examplesLength = getDiagnosticText(ts.Diagnostics.Examples_Colon_0, "").length;
        var marginLength = Math.max(syntaxLength, examplesLength);
        // Build up the syntactic skeleton.
        var syntax = makePadding(marginLength - syntaxLength);
        syntax += "tsc " + syntaxPrefix + "[" + getDiagnosticText(ts.Diagnostics.options) + "] [" + getDiagnosticText(ts.Diagnostics.file) + "...]";
        output.push(getDiagnosticText(ts.Diagnostics.Syntax_Colon_0, syntax));
        output.push(ts.sys.newLine + ts.sys.newLine);
        // Build up the list of examples.
        var padding = makePadding(marginLength);
        output.push(getDiagnosticText(ts.Diagnostics.Examples_Colon_0, makePadding(marginLength - examplesLength) + "tsc hello.ts") + ts.sys.newLine);
        output.push(padding + "tsc --outFile file.js file.ts" + ts.sys.newLine);
        output.push(padding + "tsc @args.txt" + ts.sys.newLine);
        output.push(padding + "tsc --build tsconfig.json" + ts.sys.newLine);
        output.push(ts.sys.newLine);
        output.push(getDiagnosticText(ts.Diagnostics.Options_Colon) + ts.sys.newLine);
        // We want our descriptions to align at the same column in our output,
        // so we keep track of the longest option usage string.
        marginLength = 0;
        var usageColumn = []; // Things like "-d, --declaration" go in here.
        var descriptionColumn = [];
        var optionsDescriptionMap = ts.createMap(); // Map between option.description and list of option.type if it is a kind
        for (var _i = 0, optionsList_1 = optionsList; _i < optionsList_1.length; _i++) {
            var option = optionsList_1[_i];
            // If an option lacks a description,
            // it is not officially supported.
            if (!option.description) {
                continue;
            }
            var usageText_1 = " ";
            if (option.shortName) {
                usageText_1 += "-" + option.shortName;
                usageText_1 += getParamType(option);
                usageText_1 += ", ";
            }
            usageText_1 += "--" + option.name;
            usageText_1 += getParamType(option);
            usageColumn.push(usageText_1);
            var description = void 0;
            if (option.name === "lib") {
                description = getDiagnosticText(option.description);
                var element = option.element;
                var typeMap = element.type;
                optionsDescriptionMap.set(description, ts.arrayFrom(typeMap.keys()).map(function (key) { return "'" + key + "'"; }));
            }
            else {
                description = getDiagnosticText(option.description);
            }
            descriptionColumn.push(description);
            // Set the new margin for the description column if necessary.
            marginLength = Math.max(usageText_1.length, marginLength);
        }
        // Special case that can't fit in the loop.
        var usageText = " @<" + getDiagnosticText(ts.Diagnostics.file) + ">";
        usageColumn.push(usageText);
        descriptionColumn.push(getDiagnosticText(ts.Diagnostics.Insert_command_line_options_and_files_from_a_file));
        marginLength = Math.max(usageText.length, marginLength);
        // Print out each row, aligning all the descriptions on the same column.
        for (var i = 0; i < usageColumn.length; i++) {
            var usage = usageColumn[i];
            var description = descriptionColumn[i];
            var kindsList = optionsDescriptionMap.get(description);
            output.push(usage + makePadding(marginLength - usage.length + 2) + description + ts.sys.newLine);
            if (kindsList) {
                output.push(makePadding(marginLength + 4));
                for (var _a = 0, kindsList_1 = kindsList; _a < kindsList_1.length; _a++) {
                    var kind = kindsList_1[_a];
                    output.push(kind + " ");
                }
                output.push(ts.sys.newLine);
            }
        }
        for (var _b = 0, output_1 = output; _b < output_1.length; _b++) {
            var line = output_1[_b];
            ts.sys.write(line);
        }
        return;
        function getParamType(option) {
            if (option.paramType !== undefined) {
                return " " + getDiagnosticText(option.paramType);
            }
            return "";
        }
        function makePadding(paddingLength) {
            return Array(paddingLength + 1).join(" ");
        }
    }
    ts.printHelp = printHelp;
    /**
     * Reads the config file, reports errors if any and exits if the config file cannot be found
     */
    function getParsedCommandLineOfConfigFile(configFileName, optionsToExtend, host) {
        var configFileText;
        try {
            configFileText = host.readFile(configFileName);
        }
        catch (e) {
            var error = ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_read_file_0_Colon_1, configFileName, e.message);
            host.onUnRecoverableConfigFileDiagnostic(error);
            return undefined;
        }
        if (!configFileText) {
            var error = ts.createCompilerDiagnostic(ts.Diagnostics.File_0_not_found, configFileName);
            host.onUnRecoverableConfigFileDiagnostic(error);
            return undefined;
        }
        var result = ts.parseJsonText(configFileName, configFileText);
        var cwd = host.getCurrentDirectory();
        return parseJsonSourceFileConfigFileContent(result, host, ts.getNormalizedAbsolutePath(ts.getDirectoryPath(configFileName), cwd), optionsToExtend, ts.getNormalizedAbsolutePath(configFileName, cwd));
    }
    ts.getParsedCommandLineOfConfigFile = getParsedCommandLineOfConfigFile;
    /**
     * Read tsconfig.json file
     * @param fileName The path to the config file
     */
    function readConfigFile(fileName, readFile) {
        var textOrDiagnostic = tryReadFile(fileName, readFile);
        return ts.isString(textOrDiagnostic) ? parseConfigFileTextToJson(fileName, textOrDiagnostic) : { config: {}, error: textOrDiagnostic };
    }
    ts.readConfigFile = readConfigFile;
    /**
     * Parse the text of the tsconfig.json file
     * @param fileName The path to the config file
     * @param jsonText The text of the config file
     */
    function parseConfigFileTextToJson(fileName, jsonText) {
        var jsonSourceFile = ts.parseJsonText(fileName, jsonText);
        return {
            config: convertToObject(jsonSourceFile, jsonSourceFile.parseDiagnostics),
            error: jsonSourceFile.parseDiagnostics.length ? jsonSourceFile.parseDiagnostics[0] : undefined
        };
    }
    ts.parseConfigFileTextToJson = parseConfigFileTextToJson;
    /**
     * Read tsconfig.json file
     * @param fileName The path to the config file
     */
    function readJsonConfigFile(fileName, readFile) {
        var textOrDiagnostic = tryReadFile(fileName, readFile);
        return ts.isString(textOrDiagnostic) ? ts.parseJsonText(fileName, textOrDiagnostic) : { parseDiagnostics: [textOrDiagnostic] };
    }
    ts.readJsonConfigFile = readJsonConfigFile;
    function tryReadFile(fileName, readFile) {
        var text;
        try {
            text = readFile(fileName);
        }
        catch (e) {
            return ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, e.message);
        }
        return text === undefined ? ts.createCompilerDiagnostic(ts.Diagnostics.The_specified_path_does_not_exist_Colon_0, fileName) : text;
    }
    function commandLineOptionsToMap(options) {
        return ts.arrayToMap(options, function (option) { return option.name; });
    }
    var _tsconfigRootOptions;
    function getTsconfigRootOptionsMap() {
        if (_tsconfigRootOptions === undefined) {
            _tsconfigRootOptions = {
                name: undefined,
                type: "object",
                elementOptions: commandLineOptionsToMap([
                    {
                        name: "compilerOptions",
                        type: "object",
                        elementOptions: commandLineOptionsToMap(ts.optionDeclarations),
                        extraKeyDiagnosticMessage: ts.Diagnostics.Unknown_compiler_option_0
                    },
                    {
                        name: "typingOptions",
                        type: "object",
                        elementOptions: commandLineOptionsToMap(ts.typeAcquisitionDeclarations),
                        extraKeyDiagnosticMessage: ts.Diagnostics.Unknown_type_acquisition_option_0
                    },
                    {
                        name: "typeAcquisition",
                        type: "object",
                        elementOptions: commandLineOptionsToMap(ts.typeAcquisitionDeclarations),
                        extraKeyDiagnosticMessage: ts.Diagnostics.Unknown_type_acquisition_option_0
                    },
                    {
                        name: "extends",
                        type: "string"
                    },
                    {
                        name: "references",
                        type: "list",
                        element: {
                            name: "references",
                            type: "object"
                        }
                    },
                    {
                        name: "files",
                        type: "list",
                        element: {
                            name: "files",
                            type: "string"
                        }
                    },
                    {
                        name: "include",
                        type: "list",
                        element: {
                            name: "include",
                            type: "string"
                        }
                    },
                    {
                        name: "exclude",
                        type: "list",
                        element: {
                            name: "exclude",
                            type: "string"
                        }
                    },
                    ts.compileOnSaveCommandLineOption
                ])
            };
        }
        return _tsconfigRootOptions;
    }
    /**
     * Convert the json syntax tree into the json value
     */
    function convertToObject(sourceFile, errors) {
        return convertToObjectWorker(sourceFile, errors, /*returnValue*/ true, /*knownRootOptions*/ undefined, /*jsonConversionNotifier*/ undefined);
    }
    ts.convertToObject = convertToObject;
    /**
     * Convert the json syntax tree into the json value and report errors
     * This returns the json value (apart from checking errors) only if returnValue provided is true.
     * Otherwise it just checks the errors and returns undefined
     */
    /*@internal*/
    function convertToObjectWorker(sourceFile, errors, returnValue, knownRootOptions, jsonConversionNotifier) {
        if (!sourceFile.statements.length) {
            return returnValue ? {} : undefined;
        }
        return convertPropertyValueToJson(sourceFile.statements[0].expression, knownRootOptions);
        function isRootOptionMap(knownOptions) {
            return knownRootOptions && knownRootOptions.elementOptions === knownOptions;
        }
        function convertObjectLiteralExpressionToJson(node, knownOptions, extraKeyDiagnosticMessage, parentOption) {
            var result = returnValue ? {} : undefined;
            for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
                var element = _a[_i];
                if (element.kind !== 270 /* PropertyAssignment */) {
                    errors.push(ts.createDiagnosticForNodeInSourceFile(sourceFile, element, ts.Diagnostics.Property_assignment_expected));
                    continue;
                }
                if (element.questionToken) {
                    errors.push(ts.createDiagnosticForNodeInSourceFile(sourceFile, element.questionToken, ts.Diagnostics._0_can_only_be_used_in_a_ts_file, "?"));
                }
                if (!isDoubleQuotedString(element.name)) {
                    errors.push(ts.createDiagnosticForNodeInSourceFile(sourceFile, element.name, ts.Diagnostics.String_literal_with_double_quotes_expected));
                }
                var keyText = ts.unescapeLeadingUnderscores(ts.getTextOfPropertyName(element.name));
                var option = knownOptions ? knownOptions.get(keyText) : undefined;
                if (extraKeyDiagnosticMessage && !option) {
                    errors.push(ts.createDiagnosticForNodeInSourceFile(sourceFile, element.name, extraKeyDiagnosticMessage, keyText));
                }
                var value = convertPropertyValueToJson(element.initializer, option);
                if (typeof keyText !== "undefined") {
                    if (returnValue) {
                        result[keyText] = value;
                    }
                    // Notify key value set, if user asked for it
                    if (jsonConversionNotifier &&
                        // Current callbacks are only on known parent option or if we are setting values in the root
                        (parentOption || isRootOptionMap(knownOptions))) {
                        var isValidOptionValue = isCompilerOptionsValue(option, value);
                        if (parentOption) {
                            if (isValidOptionValue) {
                                // Notify option set in the parent if its a valid option value
                                jsonConversionNotifier.onSetValidOptionKeyValueInParent(parentOption, option, value);
                            }
                        }
                        else if (isRootOptionMap(knownOptions)) {
                            if (isValidOptionValue) {
                                // Notify about the valid root key value being set
                                jsonConversionNotifier.onSetValidOptionKeyValueInRoot(keyText, element.name, value, element.initializer);
                            }
                            else if (!option) {
                                // Notify about the unknown root key value being set
                                jsonConversionNotifier.onSetUnknownOptionKeyValueInRoot(keyText, element.name, value, element.initializer);
                            }
                        }
                    }
                }
            }
            return result;
        }
        function convertArrayLiteralExpressionToJson(elements, elementOption) {
            return (returnValue ? elements.map : elements.forEach).call(elements, function (element) { return convertPropertyValueToJson(element, elementOption); });
        }
        function convertPropertyValueToJson(valueExpression, option) {
            switch (valueExpression.kind) {
                case 101 /* TrueKeyword */:
                    reportInvalidOptionValue(option && option.type !== "boolean");
                    return true;
                case 86 /* FalseKeyword */:
                    reportInvalidOptionValue(option && option.type !== "boolean");
                    return false;
                case 95 /* NullKeyword */:
                    reportInvalidOptionValue(option && option.name === "extends"); // "extends" is the only option we don't allow null/undefined for
                    return null; // tslint:disable-line:no-null-keyword
                case 9 /* StringLiteral */:
                    if (!isDoubleQuotedString(valueExpression)) {
                        errors.push(ts.createDiagnosticForNodeInSourceFile(sourceFile, valueExpression, ts.Diagnostics.String_literal_with_double_quotes_expected));
                    }
                    reportInvalidOptionValue(option && (ts.isString(option.type) && option.type !== "string"));
                    var text = valueExpression.text;
                    if (option && !ts.isString(option.type)) {
                        var customOption = option;
                        // Validate custom option type
                        if (!customOption.type.has(text.toLowerCase())) {
                            errors.push(createDiagnosticForInvalidCustomType(customOption, function (message, arg0, arg1) { return ts.createDiagnosticForNodeInSourceFile(sourceFile, valueExpression, message, arg0, arg1); }));
                        }
                    }
                    return text;
                case 8 /* NumericLiteral */:
                    reportInvalidOptionValue(option && option.type !== "number");
                    return Number(valueExpression.text);
                case 198 /* PrefixUnaryExpression */:
                    if (valueExpression.operator !== 38 /* MinusToken */ || valueExpression.operand.kind !== 8 /* NumericLiteral */) {
                        break; // not valid JSON syntax
                    }
                    reportInvalidOptionValue(option && option.type !== "number");
                    return -Number(valueExpression.operand.text);
                case 184 /* ObjectLiteralExpression */:
                    reportInvalidOptionValue(option && option.type !== "object");
                    var objectLiteralExpression = valueExpression;
                    // Currently having element option declaration in the tsconfig with type "object"
                    // determines if it needs onSetValidOptionKeyValueInParent callback or not
                    // At moment there are only "compilerOptions", "typeAcquisition" and "typingOptions"
                    // that satifies it and need it to modify options set in them (for normalizing file paths)
                    // vs what we set in the json
                    // If need arises, we can modify this interface and callbacks as needed
                    if (option) {
                        var _a = option, elementOptions = _a.elementOptions, extraKeyDiagnosticMessage = _a.extraKeyDiagnosticMessage, optionName = _a.name;
                        return convertObjectLiteralExpressionToJson(objectLiteralExpression, elementOptions, extraKeyDiagnosticMessage, optionName);
                    }
                    else {
                        return convertObjectLiteralExpressionToJson(objectLiteralExpression, /* knownOptions*/ undefined, 
                        /*extraKeyDiagnosticMessage */ undefined, /*parentOption*/ undefined);
                    }
                case 183 /* ArrayLiteralExpression */:
                    reportInvalidOptionValue(option && option.type !== "list");
                    return convertArrayLiteralExpressionToJson(valueExpression.elements, option && option.element);
            }
            // Not in expected format
            if (option) {
                reportInvalidOptionValue(/*isError*/ true);
            }
            else {
                errors.push(ts.createDiagnosticForNodeInSourceFile(sourceFile, valueExpression, ts.Diagnostics.Property_value_can_only_be_string_literal_numeric_literal_true_false_null_object_literal_or_array_literal));
            }
            return undefined;
            function reportInvalidOptionValue(isError) {
                if (isError) {
                    errors.push(ts.createDiagnosticForNodeInSourceFile(sourceFile, valueExpression, ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, option.name, getCompilerOptionValueTypeString(option)));
                }
            }
        }
        function isDoubleQuotedString(node) {
            return ts.isStringLiteral(node) && ts.isStringDoubleQuoted(node, sourceFile);
        }
    }
    ts.convertToObjectWorker = convertToObjectWorker;
    function getCompilerOptionValueTypeString(option) {
        return option.type === "list" ?
            "Array" :
            ts.isString(option.type) ? option.type : "string";
    }
    function isCompilerOptionsValue(option, value) {
        if (option) {
            if (isNullOrUndefined(value))
                return true; // All options are undefinable/nullable
            if (option.type === "list") {
                return ts.isArray(value);
            }
            var expectedType = ts.isString(option.type) ? option.type : "string";
            return typeof value === expectedType;
        }
        return false;
    }
    /**
     * Generate tsconfig configuration when running command line "--init"
     * @param options commandlineOptions to be generated into tsconfig.json
     * @param fileNames array of filenames to be generated into tsconfig.json
     */
    /* @internal */
    function generateTSConfig(options, fileNames, newLine) {
        var compilerOptions = ts.extend(options, ts.defaultInitCompilerOptions);
        var compilerOptionsMap = serializeCompilerOptions(compilerOptions);
        return writeConfigurations();
        function getCustomTypeMapOfCommandLineOption(optionDefinition) {
            if (optionDefinition.type === "string" || optionDefinition.type === "number" || optionDefinition.type === "boolean") {
                // this is of a type CommandLineOptionOfPrimitiveType
                return undefined;
            }
            else if (optionDefinition.type === "list") {
                return getCustomTypeMapOfCommandLineOption(optionDefinition.element);
            }
            else {
                return optionDefinition.type;
            }
        }
        function getNameOfCompilerOptionValue(value, customTypeMap) {
            // There is a typeMap associated with this command-line option so use it to map value back to its name
            return ts.forEachEntry(customTypeMap, function (mapValue, key) {
                if (mapValue === value) {
                    return key;
                }
            });
        }
        function serializeCompilerOptions(options) {
            var result = ts.createMap();
            var optionsNameMap = getOptionNameMap().optionNameMap;
            var _loop_3 = function (name) {
                if (ts.hasProperty(options, name)) {
                    // tsconfig only options cannot be specified via command line,
                    // so we can assume that only types that can appear here string | number | boolean
                    if (optionsNameMap.has(name) && optionsNameMap.get(name).category === ts.Diagnostics.Command_line_Options) {
                        return "continue";
                    }
                    var value = options[name];
                    var optionDefinition = optionsNameMap.get(name.toLowerCase());
                    if (optionDefinition) {
                        var customTypeMap_1 = getCustomTypeMapOfCommandLineOption(optionDefinition);
                        if (!customTypeMap_1) {
                            // There is no map associated with this compiler option then use the value as-is
                            // This is the case if the value is expect to be string, number, boolean or list of string
                            result.set(name, value);
                        }
                        else {
                            if (optionDefinition.type === "list") {
                                result.set(name, value.map(function (element) { return getNameOfCompilerOptionValue(element, customTypeMap_1); })); // TODO: GH#18217
                            }
                            else {
                                // There is a typeMap associated with this command-line option so use it to map value back to its name
                                result.set(name, getNameOfCompilerOptionValue(value, customTypeMap_1));
                            }
                        }
                    }
                }
            };
            for (var name in options) {
                _loop_3(name);
            }
            return result;
        }
        function getDefaultValueForOption(option) {
            switch (option.type) {
                case "number":
                    return 1;
                case "boolean":
                    return true;
                case "string":
                    return option.isFilePath ? "./" : "";
                case "list":
                    return [];
                case "object":
                    return {};
                default:
                    return option.type.keys().next().value;
            }
        }
        function makePadding(paddingLength) {
            return Array(paddingLength + 1).join(" ");
        }
        function isAllowedOption(_a) {
            var category = _a.category, name = _a.name;
            // Skip options which do not have a category or have category `Command_line_Options`
            // Exclude all possible `Advanced_Options` in tsconfig.json which were NOT defined in command line
            return category !== undefined
                && category !== ts.Diagnostics.Command_line_Options
                && (category !== ts.Diagnostics.Advanced_Options || compilerOptionsMap.has(name));
        }
        function writeConfigurations() {
            // Filter applicable options to place in the file
            var categorizedOptions = ts.createMultiMap();
            for (var _i = 0, optionDeclarations_1 = ts.optionDeclarations; _i < optionDeclarations_1.length; _i++) {
                var option = optionDeclarations_1[_i];
                var category = option.category;
                if (isAllowedOption(option)) {
                    categorizedOptions.add(ts.getLocaleSpecificMessage(category), option);
                }
            }
            // Serialize all options and their descriptions
            var marginLength = 0;
            var seenKnownKeys = 0;
            var nameColumn = [];
            var descriptionColumn = [];
            categorizedOptions.forEach(function (options, category) {
                if (nameColumn.length !== 0) {
                    nameColumn.push("");
                    descriptionColumn.push("");
                }
                nameColumn.push("/* " + category + " */");
                descriptionColumn.push("");
                for (var _i = 0, options_1 = options; _i < options_1.length; _i++) {
                    var option = options_1[_i];
                    var optionName = void 0;
                    if (compilerOptionsMap.has(option.name)) {
                        optionName = "\"" + option.name + "\": " + JSON.stringify(compilerOptionsMap.get(option.name)) + ((seenKnownKeys += 1) === compilerOptionsMap.size ? "" : ",");
                    }
                    else {
                        optionName = "// \"" + option.name + "\": " + JSON.stringify(getDefaultValueForOption(option)) + ",";
                    }
                    nameColumn.push(optionName);
                    descriptionColumn.push("/* " + (option.description && ts.getLocaleSpecificMessage(option.description) || option.name) + " */");
                    marginLength = Math.max(optionName.length, marginLength);
                }
            });
            // Write the output
            var tab = makePadding(2);
            var result = [];
            result.push("{");
            result.push(tab + "\"compilerOptions\": {");
            // Print out each row, aligning all the descriptions on the same column.
            for (var i = 0; i < nameColumn.length; i++) {
                var optionName = nameColumn[i];
                var description = descriptionColumn[i];
                result.push(optionName && "" + tab + tab + optionName + (description && (makePadding(marginLength - optionName.length + 2) + description)));
            }
            if (fileNames.length) {
                result.push(tab + "},");
                result.push(tab + "\"files\": [");
                for (var i = 0; i < fileNames.length; i++) {
                    result.push("" + tab + tab + JSON.stringify(fileNames[i]) + (i === fileNames.length - 1 ? "" : ","));
                }
                result.push(tab + "]");
            }
            else {
                result.push(tab + "}");
            }
            result.push("}");
            return result.join(newLine);
        }
    }
    ts.generateTSConfig = generateTSConfig;
    /**
     * Parse the contents of a config file (tsconfig.json).
     * @param json The contents of the config file to parse
     * @param host Instance of ParseConfigHost used to enumerate files in folder.
     * @param basePath A root directory to resolve relative path entries in the config
     *    file to. e.g. outDir
     */
    function parseJsonConfigFileContent(json, host, basePath, existingOptions, configFileName, resolutionStack, extraFileExtensions) {
        return parseJsonConfigFileContentWorker(json, /*sourceFile*/ undefined, host, basePath, existingOptions, configFileName, resolutionStack, extraFileExtensions);
    }
    ts.parseJsonConfigFileContent = parseJsonConfigFileContent;
    /**
     * Parse the contents of a config file (tsconfig.json).
     * @param jsonNode The contents of the config file to parse
     * @param host Instance of ParseConfigHost used to enumerate files in folder.
     * @param basePath A root directory to resolve relative path entries in the config
     *    file to. e.g. outDir
     */
    function parseJsonSourceFileConfigFileContent(sourceFile, host, basePath, existingOptions, configFileName, resolutionStack, extraFileExtensions) {
        return parseJsonConfigFileContentWorker(/*json*/ undefined, sourceFile, host, basePath, existingOptions, configFileName, resolutionStack, extraFileExtensions);
    }
    ts.parseJsonSourceFileConfigFileContent = parseJsonSourceFileConfigFileContent;
    /*@internal*/
    function setConfigFileInOptions(options, configFile) {
        if (configFile) {
            Object.defineProperty(options, "configFile", { enumerable: false, writable: false, value: configFile });
        }
    }
    ts.setConfigFileInOptions = setConfigFileInOptions;
    function isNullOrUndefined(x) {
        // tslint:disable-next-line:no-null-keyword
        return x === undefined || x === null;
    }
    function directoryOfCombinedPath(fileName, basePath) {
        // Use the `getNormalizedAbsolutePath` function to avoid canonicalizing the path, as it must remain noncanonical
        // until consistient casing errors are reported
        return ts.getDirectoryPath(ts.getNormalizedAbsolutePath(fileName, basePath));
    }
    /**
     * Parse the contents of a config file from json or json source file (tsconfig.json).
     * @param json The contents of the config file to parse
     * @param sourceFile sourceFile corresponding to the Json
     * @param host Instance of ParseConfigHost used to enumerate files in folder.
     * @param basePath A root directory to resolve relative path entries in the config
     *    file to. e.g. outDir
     * @param resolutionStack Only present for backwards-compatibility. Should be empty.
     */
    function parseJsonConfigFileContentWorker(json, sourceFile, host, basePath, existingOptions, configFileName, resolutionStack, extraFileExtensions) {
        if (existingOptions === void 0) { existingOptions = {}; }
        if (resolutionStack === void 0) { resolutionStack = []; }
        if (extraFileExtensions === void 0) { extraFileExtensions = []; }
        ts.Debug.assert((json === undefined && sourceFile !== undefined) || (json !== undefined && sourceFile === undefined));
        var errors = [];
        var parsedConfig = parseConfig(json, sourceFile, host, basePath, configFileName, resolutionStack, errors);
        var raw = parsedConfig.raw;
        var options = ts.extend(existingOptions, parsedConfig.options || {});
        options.configFilePath = configFileName && ts.normalizeSlashes(configFileName);
        setConfigFileInOptions(options, sourceFile);
        var _a = getFileNames(), fileNames = _a.fileNames, wildcardDirectories = _a.wildcardDirectories, spec = _a.spec, projectReferences = _a.projectReferences;
        return {
            options: options,
            fileNames: fileNames,
            projectReferences: projectReferences,
            typeAcquisition: parsedConfig.typeAcquisition || getDefaultTypeAcquisition(),
            raw: raw,
            errors: errors,
            wildcardDirectories: wildcardDirectories,
            compileOnSave: !!raw.compileOnSave,
            configFileSpecs: spec
        };
        function getFileNames() {
            var filesSpecs;
            if (ts.hasProperty(raw, "files") && !isNullOrUndefined(raw.files)) {
                if (ts.isArray(raw.files)) {
                    filesSpecs = raw.files;
                    if (filesSpecs.length === 0) {
                        createCompilerDiagnosticOnlyIfJson(ts.Diagnostics.The_files_list_in_config_file_0_is_empty, configFileName || "tsconfig.json");
                    }
                }
                else {
                    createCompilerDiagnosticOnlyIfJson(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "files", "Array");
                }
            }
            var includeSpecs;
            if (ts.hasProperty(raw, "include") && !isNullOrUndefined(raw.include)) {
                if (ts.isArray(raw.include)) {
                    includeSpecs = raw.include;
                }
                else {
                    createCompilerDiagnosticOnlyIfJson(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "include", "Array");
                }
            }
            var excludeSpecs;
            if (ts.hasProperty(raw, "exclude") && !isNullOrUndefined(raw.exclude)) {
                if (ts.isArray(raw.exclude)) {
                    excludeSpecs = raw.exclude;
                }
                else {
                    createCompilerDiagnosticOnlyIfJson(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "exclude", "Array");
                }
            }
            else if (raw.compilerOptions) {
                var outDir = raw.compilerOptions.outDir;
                var declarationDir = raw.compilerOptions.declarationDir;
                if (outDir || declarationDir) {
                    excludeSpecs = [outDir, declarationDir].filter(function (d) { return !!d; });
                }
            }
            if (filesSpecs === undefined && includeSpecs === undefined) {
                includeSpecs = ["**/*"];
            }
            var result = matchFileNames(filesSpecs, includeSpecs, excludeSpecs, configFileName ? directoryOfCombinedPath(configFileName, basePath) : basePath, options, host, errors, extraFileExtensions, sourceFile);
            if (result.fileNames.length === 0 && !ts.hasProperty(raw, "files") && resolutionStack.length === 0 && !ts.hasProperty(raw, "references")) {
                errors.push(getErrorForNoInputFiles(result.spec, configFileName));
            }
            if (ts.hasProperty(raw, "references") && !isNullOrUndefined(raw.references)) {
                if (ts.isArray(raw.references)) {
                    var references = [];
                    for (var _i = 0, _a = raw.references; _i < _a.length; _i++) {
                        var ref = _a[_i];
                        if (typeof ref.path !== "string") {
                            createCompilerDiagnosticOnlyIfJson(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "reference.path", "string");
                        }
                        else {
                            references.push({
                                path: ts.getNormalizedAbsolutePath(ref.path, basePath),
                                originalPath: ref.path,
                                prepend: ref.prepend,
                                circular: ref.circular
                            });
                        }
                    }
                    result.projectReferences = references;
                }
                else {
                    createCompilerDiagnosticOnlyIfJson(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "references", "Array");
                }
            }
            return result;
        }
        function createCompilerDiagnosticOnlyIfJson(message, arg0, arg1) {
            if (!sourceFile) {
                errors.push(ts.createCompilerDiagnostic(message, arg0, arg1));
            }
        }
    }
    /*@internal*/
    function isErrorNoInputFiles(error) {
        return error.code === ts.Diagnostics.No_inputs_were_found_in_config_file_0_Specified_include_paths_were_1_and_exclude_paths_were_2.code;
    }
    ts.isErrorNoInputFiles = isErrorNoInputFiles;
    /*@internal*/
    function getErrorForNoInputFiles(_a, configFileName) {
        var includeSpecs = _a.includeSpecs, excludeSpecs = _a.excludeSpecs;
        return ts.createCompilerDiagnostic(ts.Diagnostics.No_inputs_were_found_in_config_file_0_Specified_include_paths_were_1_and_exclude_paths_were_2, configFileName || "tsconfig.json", JSON.stringify(includeSpecs || []), JSON.stringify(excludeSpecs || []));
    }
    ts.getErrorForNoInputFiles = getErrorForNoInputFiles;
    function isSuccessfulParsedTsconfig(value) {
        return !!value.options;
    }
    /**
     * This *just* extracts options/include/exclude/files out of a config file.
     * It does *not* resolve the included files.
     */
    function parseConfig(json, sourceFile, host, basePath, configFileName, resolutionStack, errors) {
        basePath = ts.normalizeSlashes(basePath);
        var resolvedPath = ts.getNormalizedAbsolutePath(configFileName || "", basePath);
        if (resolutionStack.indexOf(resolvedPath) >= 0) {
            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Circularity_detected_while_resolving_configuration_Colon_0, resolutionStack.concat([resolvedPath]).join(" -> ")));
            return { raw: json || convertToObject(sourceFile, errors) };
        }
        var ownConfig = json ?
            parseOwnConfigOfJson(json, host, basePath, configFileName, errors) :
            parseOwnConfigOfJsonSourceFile(sourceFile, host, basePath, configFileName, errors);
        if (ownConfig.extendedConfigPath) {
            // copy the resolution stack so it is never reused between branches in potential diamond-problem scenarios.
            resolutionStack = resolutionStack.concat([resolvedPath]);
            var extendedConfig = getExtendedConfig(sourceFile, ownConfig.extendedConfigPath, host, basePath, resolutionStack, errors);
            if (extendedConfig && isSuccessfulParsedTsconfig(extendedConfig)) {
                var baseRaw_1 = extendedConfig.raw;
                var raw_1 = ownConfig.raw;
                var setPropertyInRawIfNotUndefined = function (propertyName) {
                    var value = raw_1[propertyName] || baseRaw_1[propertyName];
                    if (value) {
                        raw_1[propertyName] = value;
                    }
                };
                setPropertyInRawIfNotUndefined("include");
                setPropertyInRawIfNotUndefined("exclude");
                setPropertyInRawIfNotUndefined("files");
                if (raw_1.compileOnSave === undefined) {
                    raw_1.compileOnSave = baseRaw_1.compileOnSave;
                }
                ownConfig.options = ts.assign({}, extendedConfig.options, ownConfig.options);
                // TODO extend type typeAcquisition
            }
        }
        return ownConfig;
    }
    function parseOwnConfigOfJson(json, host, basePath, configFileName, errors) {
        if (ts.hasProperty(json, "excludes")) {
            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unknown_option_excludes_Did_you_mean_exclude));
        }
        var options = convertCompilerOptionsFromJsonWorker(json.compilerOptions, basePath, errors, configFileName);
        // typingOptions has been deprecated and is only supported for backward compatibility purposes.
        // It should be removed in future releases - use typeAcquisition instead.
        var typeAcquisition = convertTypeAcquisitionFromJsonWorker(json.typeAcquisition || json.typingOptions, basePath, errors, configFileName);
        json.compileOnSave = convertCompileOnSaveOptionFromJson(json, basePath, errors);
        var extendedConfigPath;
        if (json.extends) {
            if (!ts.isString(json.extends)) {
                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "extends", "string"));
            }
            else {
                var newBase = configFileName ? directoryOfCombinedPath(configFileName, basePath) : basePath;
                extendedConfigPath = getExtendsConfigPath(json.extends, host, newBase, errors, ts.createCompilerDiagnostic);
            }
        }
        return { raw: json, options: options, typeAcquisition: typeAcquisition, extendedConfigPath: extendedConfigPath };
    }
    function parseOwnConfigOfJsonSourceFile(sourceFile, host, basePath, configFileName, errors) {
        var options = getDefaultCompilerOptions(configFileName);
        var typeAcquisition, typingOptionstypeAcquisition;
        var extendedConfigPath;
        var optionsIterator = {
            onSetValidOptionKeyValueInParent: function (parentOption, option, value) {
                ts.Debug.assert(parentOption === "compilerOptions" || parentOption === "typeAcquisition" || parentOption === "typingOptions");
                var currentOption = parentOption === "compilerOptions" ?
                    options :
                    parentOption === "typeAcquisition" ?
                        (typeAcquisition || (typeAcquisition = getDefaultTypeAcquisition(configFileName))) :
                        (typingOptionstypeAcquisition || (typingOptionstypeAcquisition = getDefaultTypeAcquisition(configFileName)));
                currentOption[option.name] = normalizeOptionValue(option, basePath, value);
            },
            onSetValidOptionKeyValueInRoot: function (key, _keyNode, value, valueNode) {
                switch (key) {
                    case "extends":
                        var newBase = configFileName ? directoryOfCombinedPath(configFileName, basePath) : basePath;
                        extendedConfigPath = getExtendsConfigPath(value, host, newBase, errors, function (message, arg0) {
                            return ts.createDiagnosticForNodeInSourceFile(sourceFile, valueNode, message, arg0);
                        });
                        return;
                    case "files":
                        if (value.length === 0) {
                            errors.push(ts.createDiagnosticForNodeInSourceFile(sourceFile, valueNode, ts.Diagnostics.The_files_list_in_config_file_0_is_empty, configFileName || "tsconfig.json"));
                        }
                        return;
                }
            },
            onSetUnknownOptionKeyValueInRoot: function (key, keyNode, _value, _valueNode) {
                if (key === "excludes") {
                    errors.push(ts.createDiagnosticForNodeInSourceFile(sourceFile, keyNode, ts.Diagnostics.Unknown_option_excludes_Did_you_mean_exclude));
                }
            }
        };
        var json = convertToObjectWorker(sourceFile, errors, /*returnValue*/ true, getTsconfigRootOptionsMap(), optionsIterator);
        if (!typeAcquisition) {
            if (typingOptionstypeAcquisition) {
                typeAcquisition = (typingOptionstypeAcquisition.enableAutoDiscovery !== undefined) ?
                    {
                        enable: typingOptionstypeAcquisition.enableAutoDiscovery,
                        include: typingOptionstypeAcquisition.include,
                        exclude: typingOptionstypeAcquisition.exclude
                    } :
                    typingOptionstypeAcquisition;
            }
            else {
                typeAcquisition = getDefaultTypeAcquisition(configFileName);
            }
        }
        return { raw: json, options: options, typeAcquisition: typeAcquisition, extendedConfigPath: extendedConfigPath };
    }
    function getExtendsConfigPath(extendedConfig, host, basePath, errors, createDiagnostic) {
        extendedConfig = ts.normalizeSlashes(extendedConfig);
        // If the path isn't a rooted or relative path, don't try to resolve it (we reserve the right to special case module-id like paths in the future)
        if (!(ts.isRootedDiskPath(extendedConfig) || ts.startsWith(extendedConfig, "./") || ts.startsWith(extendedConfig, "../"))) {
            errors.push(createDiagnostic(ts.Diagnostics.A_path_in_an_extends_option_must_be_relative_or_rooted_but_0_is_not, extendedConfig));
            return undefined;
        }
        var extendedConfigPath = ts.getNormalizedAbsolutePath(extendedConfig, basePath);
        if (!host.fileExists(extendedConfigPath) && !ts.endsWith(extendedConfigPath, ".json" /* Json */)) {
            extendedConfigPath = extendedConfigPath + ".json";
            if (!host.fileExists(extendedConfigPath)) {
                errors.push(createDiagnostic(ts.Diagnostics.File_0_does_not_exist, extendedConfig));
                return undefined;
            }
        }
        return extendedConfigPath;
    }
    function getExtendedConfig(sourceFile, extendedConfigPath, host, basePath, resolutionStack, errors) {
        var _a;
        var extendedResult = readJsonConfigFile(extendedConfigPath, function (path) { return host.readFile(path); });
        if (sourceFile) {
            (sourceFile.extendedSourceFiles || (sourceFile.extendedSourceFiles = [])).push(extendedResult.fileName);
        }
        if (extendedResult.parseDiagnostics.length) {
            errors.push.apply(errors, extendedResult.parseDiagnostics);
            return undefined;
        }
        var extendedDirname = ts.getDirectoryPath(extendedConfigPath);
        var extendedConfig = parseConfig(/*json*/ undefined, extendedResult, host, extendedDirname, ts.getBaseFileName(extendedConfigPath), resolutionStack, errors);
        if (sourceFile) {
            (_a = sourceFile.extendedSourceFiles).push.apply(_a, extendedResult.extendedSourceFiles);
        }
        if (isSuccessfulParsedTsconfig(extendedConfig)) {
            // Update the paths to reflect base path
            var relativeDifference_1 = ts.convertToRelativePath(extendedDirname, basePath, ts.identity);
            var updatePath_1 = function (path) { return ts.isRootedDiskPath(path) ? path : ts.combinePaths(relativeDifference_1, path); };
            var mapPropertiesInRawIfNotUndefined = function (propertyName) {
                if (raw_2[propertyName]) {
                    raw_2[propertyName] = ts.map(raw_2[propertyName], updatePath_1);
                }
            };
            var raw_2 = extendedConfig.raw;
            mapPropertiesInRawIfNotUndefined("include");
            mapPropertiesInRawIfNotUndefined("exclude");
            mapPropertiesInRawIfNotUndefined("files");
        }
        return extendedConfig;
    }
    function convertCompileOnSaveOptionFromJson(jsonOption, basePath, errors) {
        if (!ts.hasProperty(jsonOption, ts.compileOnSaveCommandLineOption.name)) {
            return false;
        }
        var result = convertJsonOption(ts.compileOnSaveCommandLineOption, jsonOption.compileOnSave, basePath, errors);
        return typeof result === "boolean" && result;
    }
    function convertCompilerOptionsFromJson(jsonOptions, basePath, configFileName) {
        var errors = [];
        var options = convertCompilerOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName);
        return { options: options, errors: errors };
    }
    ts.convertCompilerOptionsFromJson = convertCompilerOptionsFromJson;
    function convertTypeAcquisitionFromJson(jsonOptions, basePath, configFileName) {
        var errors = [];
        var options = convertTypeAcquisitionFromJsonWorker(jsonOptions, basePath, errors, configFileName);
        return { options: options, errors: errors };
    }
    ts.convertTypeAcquisitionFromJson = convertTypeAcquisitionFromJson;
    function getDefaultCompilerOptions(configFileName) {
        var options = configFileName && ts.getBaseFileName(configFileName) === "jsconfig.json"
            ? { allowJs: true, maxNodeModuleJsDepth: 2, allowSyntheticDefaultImports: true, skipLibCheck: true, noEmit: true }
            : {};
        return options;
    }
    function convertCompilerOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName) {
        var options = getDefaultCompilerOptions(configFileName);
        convertOptionsFromJson(ts.optionDeclarations, jsonOptions, basePath, options, ts.Diagnostics.Unknown_compiler_option_0, errors);
        if (configFileName) {
            options.configFilePath = ts.normalizeSlashes(configFileName);
        }
        return options;
    }
    function getDefaultTypeAcquisition(configFileName) {
        return { enable: !!configFileName && ts.getBaseFileName(configFileName) === "jsconfig.json", include: [], exclude: [] };
    }
    function convertTypeAcquisitionFromJsonWorker(jsonOptions, basePath, errors, configFileName) {
        var options = getDefaultTypeAcquisition(configFileName);
        var typeAcquisition = convertEnableAutoDiscoveryToEnable(jsonOptions);
        convertOptionsFromJson(ts.typeAcquisitionDeclarations, typeAcquisition, basePath, options, ts.Diagnostics.Unknown_type_acquisition_option_0, errors);
        return options;
    }
    function convertOptionsFromJson(optionDeclarations, jsonOptions, basePath, defaultOptions, diagnosticMessage, errors) {
        if (!jsonOptions) {
            return;
        }
        var optionNameMap = commandLineOptionsToMap(optionDeclarations);
        for (var id in jsonOptions) {
            var opt = optionNameMap.get(id);
            if (opt) {
                defaultOptions[opt.name] = convertJsonOption(opt, jsonOptions[id], basePath, errors);
            }
            else {
                errors.push(ts.createCompilerDiagnostic(diagnosticMessage, id));
            }
        }
    }
    function convertJsonOption(opt, value, basePath, errors) {
        if (isCompilerOptionsValue(opt, value)) {
            var optType = opt.type;
            if (optType === "list" && ts.isArray(value)) {
                return convertJsonOptionOfListType(opt, value, basePath, errors);
            }
            else if (!ts.isString(optType)) {
                return convertJsonOptionOfCustomType(opt, value, errors);
            }
            return normalizeNonListOptionValue(opt, basePath, value);
        }
        else {
            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, opt.name, getCompilerOptionValueTypeString(opt)));
        }
    }
    function normalizeOptionValue(option, basePath, value) {
        if (isNullOrUndefined(value))
            return undefined;
        if (option.type === "list") {
            var listOption_1 = option;
            if (listOption_1.element.isFilePath || !ts.isString(listOption_1.element.type)) {
                return ts.filter(ts.map(value, function (v) { return normalizeOptionValue(listOption_1.element, basePath, v); }), function (v) { return !!v; });
            }
            return value;
        }
        else if (!ts.isString(option.type)) {
            return option.type.get(ts.isString(value) ? value.toLowerCase() : value);
        }
        return normalizeNonListOptionValue(option, basePath, value);
    }
    function normalizeNonListOptionValue(option, basePath, value) {
        if (option.isFilePath) {
            value = ts.normalizePath(ts.combinePaths(basePath, value));
            if (value === "") {
                value = ".";
            }
        }
        return value;
    }
    function convertJsonOptionOfCustomType(opt, value, errors) {
        if (isNullOrUndefined(value))
            return undefined;
        var key = value.toLowerCase();
        var val = opt.type.get(key);
        if (val !== undefined) {
            return val;
        }
        else {
            errors.push(createCompilerDiagnosticForInvalidCustomType(opt));
        }
    }
    function convertJsonOptionOfListType(option, values, basePath, errors) {
        return ts.filter(ts.map(values, function (v) { return convertJsonOption(option.element, v, basePath, errors); }), function (v) { return !!v; });
    }
    function trimString(s) {
        return typeof s.trim === "function" ? s.trim() : s.replace(/^[\s]+|[\s]+$/g, "");
    }
    /**
     * Tests for a path that ends in a recursive directory wildcard.
     * Matches **, \**, **\, and \**\, but not a**b.
     *
     * NOTE: used \ in place of / above to avoid issues with multiline comments.
     *
     * Breakdown:
     *  (^|\/)      # matches either the beginning of the string or a directory separator.
     *  \*\*        # matches the recursive directory wildcard "**".
     *  \/?$        # matches an optional trailing directory separator at the end of the string.
     */
    var invalidTrailingRecursionPattern = /(^|\/)\*\*\/?$/;
    /**
     * Tests for a path where .. appears after a recursive directory wildcard.
     * Matches **\..\*, **\a\..\*, and **\.., but not ..\**\*
     *
     * NOTE: used \ in place of / above to avoid issues with multiline comments.
     *
     * Breakdown:
     *  (^|\/)      # matches either the beginning of the string or a directory separator.
     *  \*\*\/      # matches a recursive directory wildcard "**" followed by a directory separator.
     *  (.*\/)?     # optionally matches any number of characters followed by a directory separator.
     *  \.\.        # matches a parent directory path component ".."
     *  ($|\/)      # matches either the end of the string or a directory separator.
     */
    var invalidDotDotAfterRecursiveWildcardPattern = /(^|\/)\*\*\/(.*\/)?\.\.($|\/)/;
    /**
     * Tests for a path containing a wildcard character in a directory component of the path.
     * Matches \*\, \?\, and \a*b\, but not \a\ or \a\*.
     *
     * NOTE: used \ in place of / above to avoid issues with multiline comments.
     *
     * Breakdown:
     *  \/          # matches a directory separator.
     *  [^/]*?      # matches any number of characters excluding directory separators (non-greedy).
     *  [*?]        # matches either a wildcard character (* or ?)
     *  [^/]*       # matches any number of characters excluding directory separators (greedy).
     *  \/          # matches a directory separator.
     */
    var watchRecursivePattern = /\/[^/]*?[*?][^/]*\//;
    /**
     * Matches the portion of a wildcard path that does not contain wildcards.
     * Matches \a of \a\*, or \a\b\c of \a\b\c\?\d.
     *
     * NOTE: used \ in place of / above to avoid issues with multiline comments.
     *
     * Breakdown:
     *  ^                   # matches the beginning of the string
     *  [^*?]*              # matches any number of non-wildcard characters
     *  (?=\/[^/]*[*?])     # lookahead that matches a directory separator followed by
     *                      # a path component that contains at least one wildcard character (* or ?).
     */
    var wildcardDirectoryPattern = /^[^*?]*(?=\/[^/]*[*?])/;
    /**
     * Expands an array of file specifications.
     *
     * @param filesSpecs The literal file names to include.
     * @param includeSpecs The wildcard file specifications to include.
     * @param excludeSpecs The wildcard file specifications to exclude.
     * @param basePath The base path for any relative file specifications.
     * @param options Compiler options.
     * @param host The host used to resolve files and directories.
     * @param errors An array for diagnostic reporting.
     */
    function matchFileNames(filesSpecs, includeSpecs, excludeSpecs, basePath, options, host, errors, extraFileExtensions, jsonSourceFile) {
        basePath = ts.normalizePath(basePath);
        var validatedIncludeSpecs, validatedExcludeSpecs;
        // The exclude spec list is converted into a regular expression, which allows us to quickly
        // test whether a file or directory should be excluded before recursively traversing the
        // file system.
        if (includeSpecs) {
            validatedIncludeSpecs = validateSpecs(includeSpecs, errors, /*allowTrailingRecursion*/ false, jsonSourceFile, "include");
        }
        if (excludeSpecs) {
            validatedExcludeSpecs = validateSpecs(excludeSpecs, errors, /*allowTrailingRecursion*/ true, jsonSourceFile, "exclude");
        }
        // Wildcard directories (provided as part of a wildcard path) are stored in a
        // file map that marks whether it was a regular wildcard match (with a `*` or `?` token),
        // or a recursive directory. This information is used by filesystem watchers to monitor for
        // new entries in these paths.
        var wildcardDirectories = getWildcardDirectories(validatedIncludeSpecs, validatedExcludeSpecs, basePath, host.useCaseSensitiveFileNames);
        var spec = { filesSpecs: filesSpecs, referencesSpecs: undefined, includeSpecs: includeSpecs, excludeSpecs: excludeSpecs, validatedIncludeSpecs: validatedIncludeSpecs, validatedExcludeSpecs: validatedExcludeSpecs, wildcardDirectories: wildcardDirectories };
        return getFileNamesFromConfigSpecs(spec, basePath, options, host, extraFileExtensions);
    }
    /**
     * Gets the file names from the provided config file specs that contain, files, include, exclude and
     * other properties needed to resolve the file names
     * @param spec The config file specs extracted with file names to include, wildcards to include/exclude and other details
     * @param basePath The base path for any relative file specifications.
     * @param options Compiler options.
     * @param host The host used to resolve files and directories.
     * @param extraFileExtensions optionaly file extra file extension information from host
     */
    /* @internal */
    function getFileNamesFromConfigSpecs(spec, basePath, options, host, extraFileExtensions) {
        if (extraFileExtensions === void 0) { extraFileExtensions = []; }
        basePath = ts.normalizePath(basePath);
        var keyMapper = host.useCaseSensitiveFileNames ? ts.identity : ts.toLowerCase;
        // Literal file names (provided via the "files" array in tsconfig.json) are stored in a
        // file map with a possibly case insensitive key. We use this map later when when including
        // wildcard paths.
        var literalFileMap = ts.createMap();
        // Wildcard paths (provided via the "includes" array in tsconfig.json) are stored in a
        // file map with a possibly case insensitive key. We use this map to store paths matched
        // via wildcard, and to handle extension priority.
        var wildcardFileMap = ts.createMap();
        var filesSpecs = spec.filesSpecs, validatedIncludeSpecs = spec.validatedIncludeSpecs, validatedExcludeSpecs = spec.validatedExcludeSpecs, wildcardDirectories = spec.wildcardDirectories;
        // Rather than requery this for each file and filespec, we query the supported extensions
        // once and store it on the expansion context.
        var supportedExtensions = ts.getSupportedExtensions(options, extraFileExtensions);
        // Literal files are always included verbatim. An "include" or "exclude" specification cannot
        // remove a literal file.
        if (filesSpecs) {
            for (var _i = 0, filesSpecs_1 = filesSpecs; _i < filesSpecs_1.length; _i++) {
                var fileName = filesSpecs_1[_i];
                var file = ts.getNormalizedAbsolutePath(fileName, basePath);
                literalFileMap.set(keyMapper(file), file);
            }
        }
        if (validatedIncludeSpecs && validatedIncludeSpecs.length > 0) {
            for (var _a = 0, _b = host.readDirectory(basePath, supportedExtensions, validatedExcludeSpecs, validatedIncludeSpecs, /*depth*/ undefined); _a < _b.length; _a++) {
                var file = _b[_a];
                // If we have already included a literal or wildcard path with a
                // higher priority extension, we should skip this file.
                //
                // This handles cases where we may encounter both <file>.ts and
                // <file>.d.ts (or <file>.js if "allowJs" is enabled) in the same
                // directory when they are compilation outputs.
                if (hasFileWithHigherPriorityExtension(file, literalFileMap, wildcardFileMap, supportedExtensions, keyMapper)) {
                    continue;
                }
                // We may have included a wildcard path with a lower priority
                // extension due to the user-defined order of entries in the
                // "include" array. If there is a lower priority extension in the
                // same directory, we should remove it.
                removeWildcardFilesWithLowerPriorityExtension(file, wildcardFileMap, supportedExtensions, keyMapper);
                var key = keyMapper(file);
                if (!literalFileMap.has(key) && !wildcardFileMap.has(key)) {
                    wildcardFileMap.set(key, file);
                }
            }
        }
        var literalFiles = ts.arrayFrom(literalFileMap.values());
        var wildcardFiles = ts.arrayFrom(wildcardFileMap.values());
        var projectReferences = spec.referencesSpecs && spec.referencesSpecs.map(function (r) {
            return __assign({}, r, { path: ts.getNormalizedAbsolutePath(r.path, basePath) });
        });
        return {
            fileNames: literalFiles.concat(wildcardFiles),
            projectReferences: projectReferences,
            wildcardDirectories: wildcardDirectories,
            spec: spec
        };
    }
    ts.getFileNamesFromConfigSpecs = getFileNamesFromConfigSpecs;
    function validateSpecs(specs, errors, allowTrailingRecursion, jsonSourceFile, specKey) {
        return specs.filter(function (spec) {
            var diag = specToDiagnostic(spec, allowTrailingRecursion);
            if (diag !== undefined) {
                errors.push(createDiagnostic(diag, spec));
            }
            return diag === undefined;
        });
        function createDiagnostic(message, spec) {
            var element = ts.getTsConfigPropArrayElementValue(jsonSourceFile, specKey, spec);
            return element ?
                ts.createDiagnosticForNodeInSourceFile(jsonSourceFile, element, message, spec) :
                ts.createCompilerDiagnostic(message, spec);
        }
    }
    function specToDiagnostic(spec, allowTrailingRecursion) {
        if (!allowTrailingRecursion && invalidTrailingRecursionPattern.test(spec)) {
            return ts.Diagnostics.File_specification_cannot_end_in_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0;
        }
        else if (invalidDotDotAfterRecursiveWildcardPattern.test(spec)) {
            return ts.Diagnostics.File_specification_cannot_contain_a_parent_directory_that_appears_after_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0;
        }
    }
    /**
     * Gets directories in a set of include patterns that should be watched for changes.
     */
    function getWildcardDirectories(include, exclude, path, useCaseSensitiveFileNames) {
        // We watch a directory recursively if it contains a wildcard anywhere in a directory segment
        // of the pattern:
        //
        //  /a/b/**/d   - Watch /a/b recursively to catch changes to any d in any subfolder recursively
        //  /a/b/*/d    - Watch /a/b recursively to catch any d in any immediate subfolder, even if a new subfolder is added
        //  /a/b        - Watch /a/b recursively to catch changes to anything in any recursive subfoler
        //
        // We watch a directory without recursion if it contains a wildcard in the file segment of
        // the pattern:
        //
        //  /a/b/*      - Watch /a/b directly to catch any new file
        //  /a/b/a?z    - Watch /a/b directly to catch any new file matching a?z
        var rawExcludeRegex = ts.getRegularExpressionForWildcard(exclude, path, "exclude");
        var excludeRegex = rawExcludeRegex && new RegExp(rawExcludeRegex, useCaseSensitiveFileNames ? "" : "i");
        var wildcardDirectories = {};
        if (include !== undefined) {
            var recursiveKeys = [];
            for (var _i = 0, include_1 = include; _i < include_1.length; _i++) {
                var file = include_1[_i];
                var spec = ts.normalizePath(ts.combinePaths(path, file));
                if (excludeRegex && excludeRegex.test(spec)) {
                    continue;
                }
                var match = getWildcardDirectoryFromSpec(spec, useCaseSensitiveFileNames);
                if (match) {
                    var key = match.key, flags = match.flags;
                    var existingFlags = wildcardDirectories[key];
                    if (existingFlags === undefined || existingFlags < flags) {
                        wildcardDirectories[key] = flags;
                        if (flags === 1 /* Recursive */) {
                            recursiveKeys.push(key);
                        }
                    }
                }
            }
            // Remove any subpaths under an existing recursively watched directory.
            for (var key in wildcardDirectories) {
                if (ts.hasProperty(wildcardDirectories, key)) {
                    for (var _a = 0, recursiveKeys_1 = recursiveKeys; _a < recursiveKeys_1.length; _a++) {
                        var recursiveKey = recursiveKeys_1[_a];
                        if (key !== recursiveKey && ts.containsPath(recursiveKey, key, path, !useCaseSensitiveFileNames)) {
                            delete wildcardDirectories[key];
                        }
                    }
                }
            }
        }
        return wildcardDirectories;
    }
    function getWildcardDirectoryFromSpec(spec, useCaseSensitiveFileNames) {
        var match = wildcardDirectoryPattern.exec(spec);
        if (match) {
            return {
                key: useCaseSensitiveFileNames ? match[0] : match[0].toLowerCase(),
                flags: watchRecursivePattern.test(spec) ? 1 /* Recursive */ : 0 /* None */
            };
        }
        if (ts.isImplicitGlob(spec)) {
            return { key: spec, flags: 1 /* Recursive */ };
        }
        return undefined;
    }
    /**
     * Determines whether a literal or wildcard file has already been included that has a higher
     * extension priority.
     *
     * @param file The path to the file.
     * @param extensionPriority The priority of the extension.
     * @param context The expansion context.
     */
    function hasFileWithHigherPriorityExtension(file, literalFiles, wildcardFiles, extensions, keyMapper) {
        var extensionPriority = ts.getExtensionPriority(file, extensions);
        var adjustedExtensionPriority = ts.adjustExtensionPriority(extensionPriority, extensions);
        for (var i = 0 /* Highest */; i < adjustedExtensionPriority; i++) {
            var higherPriorityExtension = extensions[i];
            var higherPriorityPath = keyMapper(ts.changeExtension(file, higherPriorityExtension));
            if (literalFiles.has(higherPriorityPath) || wildcardFiles.has(higherPriorityPath)) {
                return true;
            }
        }
        return false;
    }
    /**
     * Removes files included via wildcard expansion with a lower extension priority that have
     * already been included.
     *
     * @param file The path to the file.
     * @param extensionPriority The priority of the extension.
     * @param context The expansion context.
     */
    function removeWildcardFilesWithLowerPriorityExtension(file, wildcardFiles, extensions, keyMapper) {
        var extensionPriority = ts.getExtensionPriority(file, extensions);
        var nextExtensionPriority = ts.getNextLowestExtensionPriority(extensionPriority, extensions);
        for (var i = nextExtensionPriority; i < extensions.length; i++) {
            var lowerPriorityExtension = extensions[i];
            var lowerPriorityPath = keyMapper(ts.changeExtension(file, lowerPriorityExtension));
            wildcardFiles.delete(lowerPriorityPath);
        }
    }
    /**
     * Produces a cleaned version of compiler options with personally identifiying info (aka, paths) removed.
     * Also converts enum values back to strings.
     */
    /* @internal */
    function convertCompilerOptionsForTelemetry(opts) {
        var out = {};
        for (var key in opts) {
            if (opts.hasOwnProperty(key)) {
                var type = getOptionFromName(key);
                if (type !== undefined) { // Ignore unknown options
                    out[key] = getOptionValueWithEmptyStrings(opts[key], type);
                }
            }
        }
        return out;
    }
    ts.convertCompilerOptionsForTelemetry = convertCompilerOptionsForTelemetry;
    function getOptionValueWithEmptyStrings(value, option) {
        switch (option.type) {
            case "object": // "paths". Can't get any useful information from the value since we blank out strings, so just return "".
                return "";
            case "string": // Could be any arbitrary string -- use empty string instead.
                return "";
            case "number": // Allow numbers, but be sure to check it's actually a number.
                return typeof value === "number" ? value : "";
            case "boolean":
                return typeof value === "boolean" ? value : "";
            case "list":
                var elementType_1 = option.element;
                return ts.isArray(value) ? value.map(function (v) { return getOptionValueWithEmptyStrings(v, elementType_1); }) : "";
            default:
                return ts.forEachEntry(option.type, function (optionEnumValue, optionStringValue) {
                    if (optionEnumValue === value) {
                        return optionStringValue;
                    }
                }); // TODO: GH#18217
        }
    }
})(ts || (ts = {}));
var ts;
(function (ts) {
    function trace(host) {
        host.trace(ts.formatMessage.apply(undefined, arguments));
    }
    ts.trace = trace;
    /* @internal */
    function isTraceEnabled(compilerOptions, host) {
        return !!compilerOptions.traceResolution && host.trace !== undefined;
    }
    ts.isTraceEnabled = isTraceEnabled;
    function withPackageId(packageId, r) {
        return r && { path: r.path, extension: r.ext, packageId: packageId };
    }
    function noPackageId(r) {
        return withPackageId(/*packageId*/ undefined, r);
    }
    /**
     * Kinds of file that we are currently looking for.
     * Typically there is one pass with Extensions.TypeScript, then a second pass with Extensions.JavaScript.
     */
    var Extensions;
    (function (Extensions) {
        Extensions[Extensions["TypeScript"] = 0] = "TypeScript";
        Extensions[Extensions["JavaScript"] = 1] = "JavaScript";
        Extensions[Extensions["Json"] = 2] = "Json";
        Extensions[Extensions["DtsOnly"] = 3] = "DtsOnly"; /** Only '.d.ts' */
    })(Extensions || (Extensions = {}));
    /** Used with `Extensions.DtsOnly` to extract the path from TypeScript results. */
    function resolvedTypeScriptOnly(resolved) {
        if (!resolved) {
            return undefined;
        }
        ts.Debug.assert(ts.extensionIsTypeScript(resolved.extension));
        return { fileName: resolved.path, packageId: resolved.packageId };
    }
    function createResolvedModuleWithFailedLookupLocations(resolved, originalPath, isExternalLibraryImport, failedLookupLocations) {
        return {
            resolvedModule: resolved && { resolvedFileName: resolved.path, originalPath: originalPath, extension: resolved.extension, isExternalLibraryImport: isExternalLibraryImport, packageId: resolved.packageId },
            failedLookupLocations: failedLookupLocations
        };
    }
    /** Reads from "main" or "types"/"typings" depending on `extensions`. */
    function tryReadPackageJsonFields(readTypes, jsonContent, baseDirectory, state) {
        return readTypes ? tryReadFromField("typings") || tryReadFromField("types") : tryReadFromField("main");
        function tryReadFromField(fieldName) {
            if (!ts.hasProperty(jsonContent, fieldName)) {
                if (state.traceEnabled) {
                    trace(state.host, ts.Diagnostics.package_json_does_not_have_a_0_field, fieldName);
                }
                return;
            }
            var fileName = jsonContent[fieldName];
            if (!ts.isString(fileName)) {
                if (state.traceEnabled) {
                    trace(state.host, ts.Diagnostics.Expected_type_of_0_field_in_package_json_to_be_string_got_1, fieldName, typeof fileName);
                }
                return;
            }
            var path = ts.normalizePath(ts.combinePaths(baseDirectory, fileName));
            if (state.traceEnabled) {
                trace(state.host, ts.Diagnostics.package_json_has_0_field_1_that_references_2, fieldName, fileName, path);
            }
            return path;
        }
    }
    /* @internal */
    function readJson(path, host) {
        try {
            var jsonText = host.readFile(path);
            if (!jsonText)
                return {};
            var result = ts.parseConfigFileTextToJson(path, jsonText);
            if (result.error) {
                return {};
            }
            return result.config;
        }
        catch (e) {
            // gracefully handle if readFile fails or returns not JSON
            return {};
        }
    }
    ts.readJson = readJson;
    function getEffectiveTypeRoots(options, host) {
        if (options.typeRoots) {
            return options.typeRoots;
        }
        var currentDirectory;
        if (options.configFilePath) {
            currentDirectory = ts.getDirectoryPath(options.configFilePath);
        }
        else if (host.getCurrentDirectory) {
            currentDirectory = host.getCurrentDirectory();
        }
        if (currentDirectory !== undefined) {
            return getDefaultTypeRoots(currentDirectory, host);
        }
    }
    ts.getEffectiveTypeRoots = getEffectiveTypeRoots;
    /**
     * Returns the path to every node_modules/@types directory from some ancestor directory.
     * Returns undefined if there are none.
     */
    function getDefaultTypeRoots(currentDirectory, host) {
        if (!host.directoryExists) {
            return [ts.combinePaths(currentDirectory, nodeModulesAtTypes)];
            // And if it doesn't exist, tough.
        }
        var typeRoots;
        ts.forEachAncestorDirectory(ts.normalizePath(currentDirectory), function (directory) {
            var atTypes = ts.combinePaths(directory, nodeModulesAtTypes);
            if (host.directoryExists(atTypes)) {
                (typeRoots || (typeRoots = [])).push(atTypes);
            }
            return undefined;
        });
        return typeRoots;
    }
    var nodeModulesAtTypes = ts.combinePaths("node_modules", "@types");
    /**
     * @param {string | undefined} containingFile - file that contains type reference directive, can be undefined if containing file is unknown.
     * This is possible in case if resolution is performed for directives specified via 'types' parameter. In this case initial path for secondary lookups
     * is assumed to be the same as root directory of the project.
     */
    function resolveTypeReferenceDirective(typeReferenceDirectiveName, containingFile, options, host) {
        var traceEnabled = isTraceEnabled(options, host);
        var moduleResolutionState = { compilerOptions: options, host: host, traceEnabled: traceEnabled };
        var typeRoots = getEffectiveTypeRoots(options, host);
        if (traceEnabled) {
            if (containingFile === undefined) {
                if (typeRoots === undefined) {
                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set, typeReferenceDirectiveName);
                }
                else {
                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1, typeReferenceDirectiveName, typeRoots);
                }
            }
            else {
                if (typeRoots === undefined) {
                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set, typeReferenceDirectiveName, containingFile);
                }
                else {
                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_1_root_directory_2, typeReferenceDirectiveName, containingFile, typeRoots);
                }
            }
        }
        var failedLookupLocations = [];
        var resolved = primaryLookup();
        var primary = true;
        if (!resolved) {
            resolved = secondaryLookup();
            primary = false;
        }
        var resolvedTypeReferenceDirective;
        if (resolved) {
            if (!options.preserveSymlinks) {
                resolved = __assign({}, resolved, { fileName: realPath(resolved.fileName, host, traceEnabled) });
            }
            if (traceEnabled) {
                trace(host, ts.Diagnostics.Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2, typeReferenceDirectiveName, resolved.fileName, primary);
            }
            resolvedTypeReferenceDirective = { primary: primary, resolvedFileName: resolved.fileName, packageId: resolved.packageId };
        }
        return { resolvedTypeReferenceDirective: resolvedTypeReferenceDirective, failedLookupLocations: failedLookupLocations };
        function primaryLookup() {
            // Check primary library paths
            if (typeRoots && typeRoots.length) {
                if (traceEnabled) {
                    trace(host, ts.Diagnostics.Resolving_with_primary_search_path_0, typeRoots.join(", "));
                }
                return ts.forEach(typeRoots, function (typeRoot) {
                    var candidate = ts.combinePaths(typeRoot, typeReferenceDirectiveName);
                    var candidateDirectory = ts.getDirectoryPath(candidate);
                    var directoryExists = directoryProbablyExists(candidateDirectory, host);
                    if (!directoryExists && traceEnabled) {
                        trace(host, ts.Diagnostics.Directory_0_does_not_exist_skipping_all_lookups_in_it, candidateDirectory);
                    }
                    return resolvedTypeScriptOnly(loadNodeModuleFromDirectory(Extensions.DtsOnly, candidate, failedLookupLocations, !directoryExists, moduleResolutionState));
                });
            }
            else {
                if (traceEnabled) {
                    trace(host, ts.Diagnostics.Root_directory_cannot_be_determined_skipping_primary_search_paths);
                }
            }
        }
        function secondaryLookup() {
            var initialLocationForSecondaryLookup = containingFile && ts.getDirectoryPath(containingFile);
            if (initialLocationForSecondaryLookup !== undefined) {
                // check secondary locations
                if (traceEnabled) {
                    trace(host, ts.Diagnostics.Looking_up_in_node_modules_folder_initial_location_0, initialLocationForSecondaryLookup);
                }
                var result = loadModuleFromNodeModules(Extensions.DtsOnly, typeReferenceDirectiveName, initialLocationForSecondaryLookup, failedLookupLocations, moduleResolutionState, /*cache*/ undefined);
                var resolvedFile = resolvedTypeScriptOnly(result && result.value);
                if (!resolvedFile && traceEnabled) {
                    trace(host, ts.Diagnostics.Type_reference_directive_0_was_not_resolved, typeReferenceDirectiveName);
                }
                return resolvedFile;
            }
            else {
                if (traceEnabled) {
                    trace(host, ts.Diagnostics.Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_modules_folder);
                }
            }
        }
    }
    ts.resolveTypeReferenceDirective = resolveTypeReferenceDirective;
    /**
     * Given a set of options, returns the set of type directive names
     *   that should be included for this program automatically.
     * This list could either come from the config file,
     *   or from enumerating the types root + initial secondary types lookup location.
     * More type directives might appear in the program later as a result of loading actual source files;
     *   this list is only the set of defaults that are implicitly included.
     */
    function getAutomaticTypeDirectiveNames(options, host) {
        // Use explicit type list from tsconfig.json
        if (options.types) {
            return options.types;
        }
        // Walk the primary type lookup locations
        var result = [];
        if (host.directoryExists && host.getDirectories) {
            var typeRoots = getEffectiveTypeRoots(options, host);
            if (typeRoots) {
                for (var _i = 0, typeRoots_1 = typeRoots; _i < typeRoots_1.length; _i++) {
                    var root = typeRoots_1[_i];
                    if (host.directoryExists(root)) {
                        for (var _a = 0, _b = host.getDirectories(root); _a < _b.length; _a++) {
                            var typeDirectivePath = _b[_a];
                            var normalized = ts.normalizePath(typeDirectivePath);
                            var packageJsonPath = pathToPackageJson(ts.combinePaths(root, normalized));
                            // `types-publisher` sometimes creates packages with `"typings": null` for packages that don't provide their own types.
                            // See `createNotNeededPackageJSON` in the types-publisher` repo.
                            // tslint:disable-next-line:no-null-keyword
                            var isNotNeededPackage = host.fileExists(packageJsonPath) && readJson(packageJsonPath, host).typings === null;
                            if (!isNotNeededPackage) {
                                // Return just the type directive names
                                result.push(ts.getBaseFileName(normalized));
                            }
                        }
                    }
                }
            }
        }
        return result;
    }
    ts.getAutomaticTypeDirectiveNames = getAutomaticTypeDirectiveNames;
    function createModuleResolutionCache(currentDirectory, getCanonicalFileName) {
        return createModuleResolutionCacheWithMaps(ts.createMap(), ts.createMap(), currentDirectory, getCanonicalFileName);
    }
    ts.createModuleResolutionCache = createModuleResolutionCache;
    /*@internal*/
    function createModuleResolutionCacheWithMaps(directoryToModuleNameMap, moduleNameToDirectoryMap, currentDirectory, getCanonicalFileName) {
        return { getOrCreateCacheForDirectory: getOrCreateCacheForDirectory, getOrCreateCacheForModuleName: getOrCreateCacheForModuleName };
        function getOrCreateCacheForDirectory(directoryName) {
            var path = ts.toPath(directoryName, currentDirectory, getCanonicalFileName);
            var perFolderCache = directoryToModuleNameMap.get(path);
            if (!perFolderCache) {
                perFolderCache = ts.createMap();
                directoryToModuleNameMap.set(path, perFolderCache);
            }
            return perFolderCache;
        }
        function getOrCreateCacheForModuleName(nonRelativeModuleName) {
            if (ts.isExternalModuleNameRelative(nonRelativeModuleName)) {
                return undefined; // TODO: GH#18217
            }
            var perModuleNameCache = moduleNameToDirectoryMap.get(nonRelativeModuleName);
            if (!perModuleNameCache) {
                perModuleNameCache = createPerModuleNameCache();
                moduleNameToDirectoryMap.set(nonRelativeModuleName, perModuleNameCache);
            }
            return perModuleNameCache;
        }
        function createPerModuleNameCache() {
            var directoryPathMap = ts.createMap();
            return { get: get, set: set };
            function get(directory) {
                return directoryPathMap.get(ts.toPath(directory, currentDirectory, getCanonicalFileName));
            }
            /**
             * At first this function add entry directory -> module resolution result to the table.
             * Then it computes the set of parent folders for 'directory' that should have the same module resolution result
             * and for every parent folder in set it adds entry: parent -> module resolution. .
             * Lets say we first directory name: /a/b/c/d/e and resolution result is: /a/b/bar.ts.
             * Set of parent folders that should have the same result will be:
             * [
             *     /a/b/c/d, /a/b/c, /a/b
             * ]
             * this means that request for module resolution from file in any of these folder will be immediately found in cache.
             */
            function set(directory, result) {
                var path = ts.toPath(directory, currentDirectory, getCanonicalFileName);
                // if entry is already in cache do nothing
                if (directoryPathMap.has(path)) {
                    return;
                }
                directoryPathMap.set(path, result);
                var resolvedFileName = result.resolvedModule && result.resolvedModule.resolvedFileName;
                // find common prefix between directory and resolved file name
                // this common prefix should be the shorted path that has the same resolution
                // directory: /a/b/c/d/e
                // resolvedFileName: /a/b/foo.d.ts
                var commonPrefix = getCommonPrefix(path, resolvedFileName);
                var current = path;
                while (true) {
                    var parent = ts.getDirectoryPath(current);
                    if (parent === current || directoryPathMap.has(parent)) {
                        break;
                    }
                    directoryPathMap.set(parent, result);
                    current = parent;
                    if (current === commonPrefix) {
                        break;
                    }
                }
            }
            function getCommonPrefix(directory, resolution) {
                if (resolution === undefined) {
                    return undefined;
                }
                var resolutionDirectory = ts.toPath(ts.getDirectoryPath(resolution), currentDirectory, getCanonicalFileName);
                // find first position where directory and resolution differs
                var i = 0;
                while (i < Math.min(directory.length, resolutionDirectory.length) && directory.charCodeAt(i) === resolutionDirectory.charCodeAt(i)) {
                    i++;
                }
                // find last directory separator before position i
                var sep = directory.lastIndexOf(ts.directorySeparator, i);
                if (sep < 0) {
                    return undefined;
                }
                return directory.substr(0, sep);
            }
        }
    }
    ts.createModuleResolutionCacheWithMaps = createModuleResolutionCacheWithMaps;
    function resolveModuleNameFromCache(moduleName, containingFile, cache) {
        var containingDirectory = ts.getDirectoryPath(containingFile);
        var perFolderCache = cache && cache.getOrCreateCacheForDirectory(containingDirectory);
        return perFolderCache && perFolderCache.get(moduleName);
    }
    ts.resolveModuleNameFromCache = resolveModuleNameFromCache;
    function resolveModuleName(moduleName, containingFile, compilerOptions, host, cache) {
        var traceEnabled = isTraceEnabled(compilerOptions, host);
        if (traceEnabled) {
            trace(host, ts.Diagnostics.Resolving_module_0_from_1, moduleName, containingFile);
        }
        var containingDirectory = ts.getDirectoryPath(containingFile);
        var perFolderCache = cache && cache.getOrCreateCacheForDirectory(containingDirectory);
        var result = perFolderCache && perFolderCache.get(moduleName);
        if (result) {
            if (traceEnabled) {
                trace(host, ts.Diagnostics.Resolution_for_module_0_was_found_in_cache_from_location_1, moduleName, containingDirectory);
            }
        }
        else {
            var moduleResolution = compilerOptions.moduleResolution;
            if (moduleResolution === undefined) {
                moduleResolution = ts.getEmitModuleKind(compilerOptions) === ts.ModuleKind.CommonJS ? ts.ModuleResolutionKind.NodeJs : ts.ModuleResolutionKind.Classic;
                if (traceEnabled) {
                    trace(host, ts.Diagnostics.Module_resolution_kind_is_not_specified_using_0, ts.ModuleResolutionKind[moduleResolution]);
                }
            }
            else {
                if (traceEnabled) {
                    trace(host, ts.Diagnostics.Explicitly_specified_module_resolution_kind_Colon_0, ts.ModuleResolutionKind[moduleResolution]);
                }
            }
            switch (moduleResolution) {
                case ts.ModuleResolutionKind.NodeJs:
                    result = nodeModuleNameResolver(moduleName, containingFile, compilerOptions, host, cache);
                    break;
                case ts.ModuleResolutionKind.Classic:
                    result = classicNameResolver(moduleName, containingFile, compilerOptions, host, cache);
                    break;
                default:
                    return ts.Debug.fail("Unexpected moduleResolution: " + moduleResolution);
            }
            if (perFolderCache) {
                perFolderCache.set(moduleName, result);
                // put result in per-module name cache
                var perModuleNameCache = cache.getOrCreateCacheForModuleName(moduleName);
                if (perModuleNameCache) {
                    perModuleNameCache.set(containingDirectory, result);
                }
            }
        }
        if (traceEnabled) {
            if (result.resolvedModule) {
                trace(host, ts.Diagnostics.Module_name_0_was_successfully_resolved_to_1, moduleName, result.resolvedModule.resolvedFileName);
            }
            else {
                trace(host, ts.Diagnostics.Module_name_0_was_not_resolved, moduleName);
            }
        }
        return result;
    }
    ts.resolveModuleName = resolveModuleName;
    /**
     * Any module resolution kind can be augmented with optional settings: 'baseUrl', 'paths' and 'rootDirs' - they are used to
     * mitigate differences between design time structure of the project and its runtime counterpart so the same import name
     * can be resolved successfully by TypeScript compiler and runtime module loader.
     * If these settings are set then loading procedure will try to use them to resolve module name and it can of failure it will
     * fallback to standard resolution routine.
     *
     * - baseUrl - this setting controls how non-relative module names are resolved. If this setting is specified then non-relative
     * names will be resolved relative to baseUrl: i.e. if baseUrl is '/a/b' then candidate location to resolve module name 'c/d' will
     * be '/a/b/c/d'
     * - paths - this setting can only be used when baseUrl is specified. allows to tune how non-relative module names
     * will be resolved based on the content of the module name.
     * Structure of 'paths' compiler options
     * 'paths': {
     *    pattern-1: [...substitutions],
     *    pattern-2: [...substitutions],
     *    ...
     *    pattern-n: [...substitutions]
     * }
     * Pattern here is a string that can contain zero or one '*' character. During module resolution module name will be matched against
     * all patterns in the list. Matching for patterns that don't contain '*' means that module name must be equal to pattern respecting the case.
     * If pattern contains '*' then to match pattern "<prefix>*<suffix>" module name must start with the <prefix> and end with <suffix>.
     * <MatchedStar> denotes part of the module name between <prefix> and <suffix>.
     * If module name can be matches with multiple patterns then pattern with the longest prefix will be picked.
     * After selecting pattern we'll use list of substitutions to get candidate locations of the module and the try to load module
     * from the candidate location.
     * Substitution is a string that can contain zero or one '*'. To get candidate location from substitution we'll pick every
     * substitution in the list and replace '*' with <MatchedStar> string. If candidate location is not rooted it
     * will be converted to absolute using baseUrl.
     * For example:
     * baseUrl: /a/b/c
     * "paths": {
     *     // match all module names
     *     "*": [
     *         "*",        // use matched name as is,
     *                     // <matched name> will be looked as /a/b/c/<matched name>
     *
     *         "folder1/*" // substitution will convert matched name to 'folder1/<matched name>',
     *                     // since it is not rooted then final candidate location will be /a/b/c/folder1/<matched name>
     *     ],
     *     // match module names that start with 'components/'
     *     "components/*": [ "/root/components/*" ] // substitution will convert /components/folder1/<matched name> to '/root/components/folder1/<matched name>',
     *                                              // it is rooted so it will be final candidate location
     * }
     *
     * 'rootDirs' allows the project to be spreaded across multiple locations and resolve modules with relative names as if
     * they were in the same location. For example lets say there are two files
     * '/local/src/content/file1.ts'
     * '/shared/components/contracts/src/content/protocols/file2.ts'
     * After bundling content of '/shared/components/contracts/src' will be merged with '/local/src' so
     * if file1 has the following import 'import {x} from "./protocols/file2"' it will be resolved successfully in runtime.
     * 'rootDirs' provides the way to tell compiler that in order to get the whole project it should behave as if content of all
     * root dirs were merged together.
     * I.e. for the example above 'rootDirs' will have two entries: [ '/local/src', '/shared/components/contracts/src' ].
     * Compiler will first convert './protocols/file2' into absolute path relative to the location of containing file:
     * '/local/src/content/protocols/file2' and try to load it - failure.
     * Then it will search 'rootDirs' looking for a longest matching prefix of this absolute path and if such prefix is found - absolute path will
     * be converted to a path relative to found rootDir entry './content/protocols/file2' (*). As a last step compiler will check all remaining
     * entries in 'rootDirs', use them to build absolute path out of (*) and try to resolve module from this location.
     */
    function tryLoadModuleUsingOptionalResolutionSettings(extensions, moduleName, containingDirectory, loader, failedLookupLocations, state) {
        if (!ts.isExternalModuleNameRelative(moduleName)) {
            return tryLoadModuleUsingBaseUrl(extensions, moduleName, loader, failedLookupLocations, state);
        }
        else {
            return tryLoadModuleUsingRootDirs(extensions, moduleName, containingDirectory, loader, failedLookupLocations, state);
        }
    }
    function tryLoadModuleUsingRootDirs(extensions, moduleName, containingDirectory, loader, failedLookupLocations, state) {
        if (!state.compilerOptions.rootDirs) {
            return undefined;
        }
        if (state.traceEnabled) {
            trace(state.host, ts.Diagnostics.rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0, moduleName);
        }
        var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
        var matchedRootDir;
        var matchedNormalizedPrefix;
        for (var _i = 0, _a = state.compilerOptions.rootDirs; _i < _a.length; _i++) {
            var rootDir = _a[_i];
            // rootDirs are expected to be absolute
            // in case of tsconfig.json this will happen automatically - compiler will expand relative names
            // using location of tsconfig.json as base location
            var normalizedRoot = ts.normalizePath(rootDir);
            if (!ts.endsWith(normalizedRoot, ts.directorySeparator)) {
                normalizedRoot += ts.directorySeparator;
            }
            var isLongestMatchingPrefix = ts.startsWith(candidate, normalizedRoot) &&
                (matchedNormalizedPrefix === undefined || matchedNormalizedPrefix.length < normalizedRoot.length);
            if (state.traceEnabled) {
                trace(state.host, ts.Diagnostics.Checking_if_0_is_the_longest_matching_prefix_for_1_2, normalizedRoot, candidate, isLongestMatchingPrefix);
            }
            if (isLongestMatchingPrefix) {
                matchedNormalizedPrefix = normalizedRoot;
                matchedRootDir = rootDir;
            }
        }
        if (matchedNormalizedPrefix) {
            if (state.traceEnabled) {
                trace(state.host, ts.Diagnostics.Longest_matching_prefix_for_0_is_1, candidate, matchedNormalizedPrefix);
            }
            var suffix = candidate.substr(matchedNormalizedPrefix.length);
            // first - try to load from a initial location
            if (state.traceEnabled) {
                trace(state.host, ts.Diagnostics.Loading_0_from_the_root_dir_1_candidate_location_2, suffix, matchedNormalizedPrefix, candidate);
            }
            var resolvedFileName = loader(extensions, candidate, failedLookupLocations, !directoryProbablyExists(containingDirectory, state.host), state);
            if (resolvedFileName) {
                return resolvedFileName;
            }
            if (state.traceEnabled) {
                trace(state.host, ts.Diagnostics.Trying_other_entries_in_rootDirs);
            }
            // then try to resolve using remaining entries in rootDirs
            for (var _b = 0, _c = state.compilerOptions.rootDirs; _b < _c.length; _b++) {
                var rootDir = _c[_b];
                if (rootDir === matchedRootDir) {
                    // skip the initially matched entry
                    continue;
                }
                var candidate_1 = ts.combinePaths(ts.normalizePath(rootDir), suffix);
                if (state.traceEnabled) {
                    trace(state.host, ts.Diagnostics.Loading_0_from_the_root_dir_1_candidate_location_2, suffix, rootDir, candidate_1);
                }
                var baseDirectory = ts.getDirectoryPath(candidate_1);
                var resolvedFileName_1 = loader(extensions, candidate_1, failedLookupLocations, !directoryProbablyExists(baseDirectory, state.host), state);
                if (resolvedFileName_1) {
                    return resolvedFileName_1;
                }
            }
            if (state.traceEnabled) {
                trace(state.host, ts.Diagnostics.Module_resolution_using_rootDirs_has_failed);
            }
        }
        return undefined;
    }
    function tryLoadModuleUsingBaseUrl(extensions, moduleName, loader, failedLookupLocations, state) {
        if (!state.compilerOptions.baseUrl) {
            return undefined;
        }
        if (state.traceEnabled) {
            trace(state.host, ts.Diagnostics.baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1, state.compilerOptions.baseUrl, moduleName);
        }
        // string is for exact match
        var matchedPattern;
        if (state.compilerOptions.paths) {
            if (state.traceEnabled) {
                trace(state.host, ts.Diagnostics.paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0, moduleName);
            }
            matchedPattern = ts.matchPatternOrExact(ts.getOwnKeys(state.compilerOptions.paths), moduleName);
        }
        if (matchedPattern) {
            var matchedStar_1 = ts.isString(matchedPattern) ? undefined : ts.matchedText(matchedPattern, moduleName);
            var matchedPatternText = ts.isString(matchedPattern) ? matchedPattern : ts.patternText(matchedPattern);
            if (state.traceEnabled) {
                trace(state.host, ts.Diagnostics.Module_name_0_matched_pattern_1, moduleName, matchedPatternText);
            }
            return ts.forEach(state.compilerOptions.paths[matchedPatternText], function (subst) {
                var path = matchedStar_1 ? subst.replace("*", matchedStar_1) : subst;
                var candidate = ts.normalizePath(ts.combinePaths(state.compilerOptions.baseUrl, path));
                if (state.traceEnabled) {
                    trace(state.host, ts.Diagnostics.Trying_substitution_0_candidate_module_location_Colon_1, subst, path);
                }
                // A path mapping may have an extension, in contrast to an import, which should omit it.
                var extension = ts.tryGetExtensionFromPath(candidate);
                if (extension !== undefined) {
                    var path_1 = tryFile(candidate, failedLookupLocations, /*onlyRecordFailures*/ false, state);
                    if (path_1 !== undefined) {
                        return noPackageId({ path: path_1, ext: extension });
                    }
                }
                return loader(extensions, candidate, failedLookupLocations, !directoryProbablyExists(ts.getDirectoryPath(candidate), state.host), state);
            });
        }
        else {
            var candidate = ts.normalizePath(ts.combinePaths(state.compilerOptions.baseUrl, moduleName));
            if (state.traceEnabled) {
                trace(state.host, ts.Diagnostics.Resolving_module_name_0_relative_to_base_url_1_2, moduleName, state.compilerOptions.baseUrl, candidate);
            }
            return loader(extensions, candidate, failedLookupLocations, !directoryProbablyExists(ts.getDirectoryPath(candidate), state.host), state);
        }
    }
    function nodeModuleNameResolver(moduleName, containingFile, compilerOptions, host, cache) {
        return nodeModuleNameResolverWorker(moduleName, ts.getDirectoryPath(containingFile), compilerOptions, host, cache, /*jsOnly*/ false);
    }
    ts.nodeModuleNameResolver = nodeModuleNameResolver;
    /**
     * Expose resolution logic to allow us to use Node module resolution logic from arbitrary locations.
     * No way to do this with `require()`: https://github.com/nodejs/node/issues/5963
     * Throws an error if the module can't be resolved.
     */
    /* @internal */
    function resolveJavaScriptModule(moduleName, initialDir, host) {
        var _a = nodeModuleNameResolverWorker(moduleName, initialDir, { moduleResolution: ts.ModuleResolutionKind.NodeJs, allowJs: true }, host, /*cache*/ undefined, /*jsOnly*/ true), resolvedModule = _a.resolvedModule, failedLookupLocations = _a.failedLookupLocations;
        if (!resolvedModule) {
            throw new Error("Could not resolve JS module '" + moduleName + "' starting at '" + initialDir + "'. Looked in: " + failedLookupLocations.join(", "));
        }
        return resolvedModule.resolvedFileName;
    }
    ts.resolveJavaScriptModule = resolveJavaScriptModule;
    function nodeModuleNameResolverWorker(moduleName, containingDirectory, compilerOptions, host, cache, jsOnly) {
        var traceEnabled = isTraceEnabled(compilerOptions, host);
        var failedLookupLocations = [];
        var state = { compilerOptions: compilerOptions, host: host, traceEnabled: traceEnabled };
        var result = jsOnly ?
            tryResolve(Extensions.JavaScript) :
            (tryResolve(Extensions.TypeScript) ||
                tryResolve(Extensions.JavaScript) ||
                (compilerOptions.resolveJsonModule ? tryResolve(Extensions.Json) : undefined));
        if (result && result.value) {
            var _a = result.value, resolved = _a.resolved, originalPath = _a.originalPath, isExternalLibraryImport = _a.isExternalLibraryImport;
            return createResolvedModuleWithFailedLookupLocations(resolved, originalPath, isExternalLibraryImport, failedLookupLocations);
        }
        return { resolvedModule: undefined, failedLookupLocations: failedLookupLocations };
        function tryResolve(extensions) {
            var loader = function (extensions, candidate, failedLookupLocations, onlyRecordFailures, state) { return nodeLoadModuleByRelativeName(extensions, candidate, failedLookupLocations, onlyRecordFailures, state, /*considerPackageJson*/ true); };
            var resolved = tryLoadModuleUsingOptionalResolutionSettings(extensions, moduleName, containingDirectory, loader, failedLookupLocations, state);
            if (resolved) {
                return toSearchResult({ resolved: resolved, isExternalLibraryImport: false });
            }
            if (!ts.isExternalModuleNameRelative(moduleName)) {
                if (traceEnabled) {
                    trace(host, ts.Diagnostics.Loading_module_0_from_node_modules_folder_target_file_type_1, moduleName, Extensions[extensions]);
                }
                var resolved_1 = loadModuleFromNodeModules(extensions, moduleName, containingDirectory, failedLookupLocations, state, cache);
                if (!resolved_1)
                    return undefined;
                var resolvedValue = resolved_1.value;
                var originalPath = void 0;
                if (!compilerOptions.preserveSymlinks && resolvedValue) {
                    originalPath = resolvedValue.path;
                    var path = realPath(resolvedValue.path, host, traceEnabled);
                    if (path === originalPath) {
                        originalPath = undefined;
                    }
                    resolvedValue = __assign({}, resolvedValue, { path: path });
                }
                // For node_modules lookups, get the real path so that multiple accesses to an `npm link`-ed module do not create duplicate files.
                return { value: resolvedValue && { resolved: resolvedValue, originalPath: originalPath, isExternalLibraryImport: true } };
            }
            else {
                var _a = ts.normalizePathAndParts(ts.combinePaths(containingDirectory, moduleName)), candidate = _a.path, parts = _a.parts;
                var resolved_2 = nodeLoadModuleByRelativeName(extensions, candidate, failedLookupLocations, /*onlyRecordFailures*/ false, state, /*considerPackageJson*/ true);
                // Treat explicit "node_modules" import as an external library import.
                return resolved_2 && toSearchResult({ resolved: resolved_2, isExternalLibraryImport: ts.contains(parts, "node_modules") });
            }
        }
    }
    function realPath(path, host, traceEnabled) {
        if (!host.realpath) {
            return path;
        }
        var real = ts.normalizePath(host.realpath(path));
        if (traceEnabled) {
            trace(host, ts.Diagnostics.Resolving_real_path_for_0_result_1, path, real);
        }
        ts.Debug.assert(host.fileExists(real), path + " linked to nonexistent file " + real); // tslint:disable-line
        return real;
    }
    function nodeLoadModuleByRelativeName(extensions, candidate, failedLookupLocations, onlyRecordFailures, state, considerPackageJson) {
        if (state.traceEnabled) {
            trace(state.host, ts.Diagnostics.Loading_module_as_file_Slash_folder_candidate_module_location_0_target_file_type_1, candidate, Extensions[extensions]);
        }
        if (!ts.hasTrailingDirectorySeparator(candidate)) {
            if (!onlyRecordFailures) {
                var parentOfCandidate = ts.getDirectoryPath(candidate);
                if (!directoryProbablyExists(parentOfCandidate, state.host)) {
                    if (state.traceEnabled) {
                        trace(state.host, ts.Diagnostics.Directory_0_does_not_exist_skipping_all_lookups_in_it, parentOfCandidate);
                    }
                    onlyRecordFailures = true;
                }
            }
            var resolvedFromFile = loadModuleFromFile(extensions, candidate, failedLookupLocations, onlyRecordFailures, state);
            if (resolvedFromFile) {
                var nm = considerPackageJson ? parseNodeModuleFromPath(resolvedFromFile) : undefined;
                var packageId = nm && getPackageJsonInfo(nm.packageDirectory, nm.subModuleName, failedLookupLocations, /*onlyRecordFailures*/ false, state).packageId;
                return withPackageId(packageId, resolvedFromFile);
            }
        }
        if (!onlyRecordFailures) {
            var candidateExists = directoryProbablyExists(candidate, state.host);
            if (!candidateExists) {
                if (state.traceEnabled) {
                    trace(state.host, ts.Diagnostics.Directory_0_does_not_exist_skipping_all_lookups_in_it, candidate);
                }
                onlyRecordFailures = true;
            }
        }
        return loadNodeModuleFromDirectory(extensions, candidate, failedLookupLocations, onlyRecordFailures, state, considerPackageJson);
    }
    var nodeModulesPathPart = "/node_modules/";
    /**
     * This will be called on the successfully resolved path from `loadModuleFromFile`.
     * (Not neeeded for `loadModuleFromNodeModules` as that looks up the `package.json` as part of resolution.)
     *
     * packageDirectory is the directory of the package itself.
     * subModuleName is the path within the package.
     *   For `blah/node_modules/foo/index.d.ts` this is { packageDirectory: "foo", subModuleName: "index.d.ts" }. (Part before "/node_modules/" is ignored.)
     *   For `/node_modules/foo/bar.d.ts` this is { packageDirectory: "foo", subModuleName": "bar/index.d.ts" }.
     *   For `/node_modules/@types/foo/bar/index.d.ts` this is { packageDirectory: "@types/foo", subModuleName: "bar/index.d.ts" }.
     *   For `/node_modules/foo/bar/index.d.ts` this is { packageDirectory: "foo", subModuleName": "bar/index.d.ts" }.
     */
    function parseNodeModuleFromPath(resolved) {
        var path = ts.normalizePath(resolved.path);
        var idx = path.lastIndexOf(nodeModulesPathPart);
        if (idx === -1) {
            return undefined;
        }
        var indexAfterNodeModules = idx + nodeModulesPathPart.length;
        var indexAfterPackageName = moveToNextDirectorySeparatorIfAvailable(path, indexAfterNodeModules);
        if (path.charCodeAt(indexAfterNodeModules) === 64 /* at */) {
            indexAfterPackageName = moveToNextDirectorySeparatorIfAvailable(path, indexAfterPackageName);
        }
        var packageDirectory = path.slice(0, indexAfterPackageName);
        var subModuleName = ts.removeExtension(path.slice(indexAfterPackageName + 1), resolved.ext) + ".d.ts" /* Dts */;
        return { packageDirectory: packageDirectory, subModuleName: subModuleName };
    }
    function moveToNextDirectorySeparatorIfAvailable(path, prevSeparatorIndex) {
        var nextSeparatorIndex = path.indexOf(ts.directorySeparator, prevSeparatorIndex + 1);
        return nextSeparatorIndex === -1 ? prevSeparatorIndex : nextSeparatorIndex;
    }
    function addExtensionAndIndex(path) {
        if (path === "") {
            return "index.d.ts";
        }
        if (ts.endsWith(path, ".d.ts")) {
            return path;
        }
        if (ts.endsWith(path, "/index")) {
            return path + ".d.ts";
        }
        return path + "/index.d.ts";
    }
    /* @internal */
    function directoryProbablyExists(directoryName, host) {
        // if host does not support 'directoryExists' assume that directory will exist
        return !host.directoryExists || host.directoryExists(directoryName);
    }
    ts.directoryProbablyExists = directoryProbablyExists;
    function loadModuleFromFileNoPackageId(extensions, candidate, failedLookupLocations, onlyRecordFailures, state) {
        return noPackageId(loadModuleFromFile(extensions, candidate, failedLookupLocations, onlyRecordFailures, state));
    }
    /**
     * @param {boolean} onlyRecordFailures - if true then function won't try to actually load files but instead record all attempts as failures. This flag is necessary
     * in cases when we know upfront that all load attempts will fail (because containing folder does not exists) however we still need to record all failed lookup locations.
     */
    function loadModuleFromFile(extensions, candidate, failedLookupLocations, onlyRecordFailures, state) {
        if (extensions === Extensions.Json) {
            var extensionLess = ts.tryRemoveExtension(candidate, ".json" /* Json */);
            return extensionLess === undefined ? undefined : tryAddingExtensions(extensionLess, extensions, failedLookupLocations, onlyRecordFailures, state);
        }
        // First, try adding an extension. An import of "foo" could be matched by a file "foo.ts", or "foo.js" by "foo.js.ts"
        var resolvedByAddingExtension = tryAddingExtensions(candidate, extensions, failedLookupLocations, onlyRecordFailures, state);
        if (resolvedByAddingExtension) {
            return resolvedByAddingExtension;
        }
        // If that didn't work, try stripping a ".js" or ".jsx" extension and replacing it with a TypeScript one;
        // e.g. "./foo.js" can be matched by "./foo.ts" or "./foo.d.ts"
        if (ts.hasJavaScriptFileExtension(candidate)) {
            var extensionless = ts.removeFileExtension(candidate);
            if (state.traceEnabled) {
                var extension = candidate.substring(extensionless.length);
                trace(state.host, ts.Diagnostics.File_name_0_has_a_1_extension_stripping_it, candidate, extension);
            }
            return tryAddingExtensions(extensionless, extensions, failedLookupLocations, onlyRecordFailures, state);
        }
    }
    /** Try to return an existing file that adds one of the `extensions` to `candidate`. */
    function tryAddingExtensions(candidate, extensions, failedLookupLocations, onlyRecordFailures, state) {
        if (!onlyRecordFailures) {
            // check if containing folder exists - if it doesn't then just record failures for all supported extensions without disk probing
            var directory = ts.getDirectoryPath(candidate);
            if (directory) {
                onlyRecordFailures = !directoryProbablyExists(directory, state.host);
            }
        }
        switch (extensions) {
            case Extensions.DtsOnly:
                return tryExtension(".d.ts" /* Dts */);
            case Extensions.TypeScript:
                return tryExtension(".ts" /* Ts */) || tryExtension(".tsx" /* Tsx */) || tryExtension(".d.ts" /* Dts */);
            case Extensions.JavaScript:
                return tryExtension(".js" /* Js */) || tryExtension(".jsx" /* Jsx */);
            case Extensions.Json:
                return tryExtension(".json" /* Json */);
        }
        function tryExtension(ext) {
            var path = tryFile(candidate + ext, failedLookupLocations, onlyRecordFailures, state);
            return path === undefined ? undefined : { path: path, ext: ext };
        }
    }
    /** Return the file if it exists. */
    function tryFile(fileName, failedLookupLocations, onlyRecordFailures, state) {
        if (!onlyRecordFailures) {
            if (state.host.fileExists(fileName)) {
                if (state.traceEnabled) {
                    trace(state.host, ts.Diagnostics.File_0_exist_use_it_as_a_name_resolution_result, fileName);
                }
                return fileName;
            }
            else {
                if (state.traceEnabled) {
                    trace(state.host, ts.Diagnostics.File_0_does_not_exist, fileName);
                }
            }
        }
        failedLookupLocations.push(fileName);
        return undefined;
    }
    function loadNodeModuleFromDirectory(extensions, candidate, failedLookupLocations, onlyRecordFailures, state, considerPackageJson) {
        if (considerPackageJson === void 0) { considerPackageJson = true; }
        var _a = considerPackageJson
            ? getPackageJsonInfo(candidate, "", failedLookupLocations, onlyRecordFailures, state)
            : { packageJsonContent: undefined, packageId: undefined }, packageJsonContent = _a.packageJsonContent, packageId = _a.packageId;
        return withPackageId(packageId, loadNodeModuleFromDirectoryWorker(extensions, candidate, failedLookupLocations, onlyRecordFailures, state, packageJsonContent));
    }
    function loadNodeModuleFromDirectoryWorker(extensions, candidate, failedLookupLocations, onlyRecordFailures, state, packageJsonContent) {
        var fromPackageJson = packageJsonContent && loadModuleFromPackageJson(packageJsonContent, extensions, candidate, failedLookupLocations, state);
        if (fromPackageJson) {
            return fromPackageJson;
        }
        var directoryExists = !onlyRecordFailures && directoryProbablyExists(candidate, state.host);
        return loadModuleFromFile(extensions, ts.combinePaths(candidate, "index"), failedLookupLocations, !directoryExists, state);
    }
    function getPackageJsonInfo(nodeModuleDirectory, subModuleName, failedLookupLocations, onlyRecordFailures, state) {
        var host = state.host, traceEnabled = state.traceEnabled;
        var directoryExists = !onlyRecordFailures && directoryProbablyExists(nodeModuleDirectory, host);
        var packageJsonPath = pathToPackageJson(nodeModuleDirectory);
        if (directoryExists && host.fileExists(packageJsonPath)) {
            var packageJsonContent = readJson(packageJsonPath, host);
            if (subModuleName === "") { // looking up the root - need to handle types/typings/main redirects for subModuleName
                var path = tryReadPackageJsonFields(/*readTypes*/ true, packageJsonContent, nodeModuleDirectory, state);
                if (typeof path === "string") {
                    subModuleName = addExtensionAndIndex(path.substring(nodeModuleDirectory.length + 1));
                }
                else {
                    var jsPath = tryReadPackageJsonFields(/*readTypes*/ false, packageJsonContent, nodeModuleDirectory, state);
                    if (typeof jsPath === "string" && jsPath.length > nodeModuleDirectory.length) {
                        var potentialSubModule_1 = jsPath.substring(nodeModuleDirectory.length + 1);
                        subModuleName = (ts.forEach(ts.supportedJavascriptExtensions, function (extension) {
                            return ts.tryRemoveExtension(potentialSubModule_1, extension);
                        }) || potentialSubModule_1) + ".d.ts" /* Dts */;
                    }
                    else {
                        subModuleName = "index.d.ts";
                    }
                }
            }
            if (!ts.endsWith(subModuleName, ".d.ts" /* Dts */)) {
                subModuleName = addExtensionAndIndex(subModuleName);
            }
            var packageId = typeof packageJsonContent.name === "string" && typeof packageJsonContent.version === "string"
                ? { name: packageJsonContent.name, subModuleName: subModuleName, version: packageJsonContent.version }
                : undefined;
            if (traceEnabled) {
                if (packageId) {
                    trace(host, ts.Diagnostics.Found_package_json_at_0_Package_ID_is_1, packageJsonPath, ts.packageIdToString(packageId));
                }
                else {
                    trace(host, ts.Diagnostics.Found_package_json_at_0, packageJsonPath);
                }
            }
            return { found: true, packageJsonContent: packageJsonContent, packageId: packageId };
        }
        else {
            if (directoryExists && traceEnabled) {
                trace(host, ts.Diagnostics.File_0_does_not_exist, packageJsonPath);
            }
            // record package json as one of failed lookup locations - in the future if this file will appear it will invalidate resolution results
            failedLookupLocations.push(packageJsonPath);
            return { found: false, packageJsonContent: undefined, packageId: undefined };
        }
    }
    function loadModuleFromPackageJson(jsonContent, extensions, candidate, failedLookupLocations, state) {
        var file = tryReadPackageJsonFields(extensions !== Extensions.JavaScript && extensions !== Extensions.Json, jsonContent, candidate, state);
        if (!file) {
            if (extensions === Extensions.TypeScript) {
                // When resolving typescript modules, try resolving using main field as well
                file = tryReadPackageJsonFields(/*readTypes*/ false, jsonContent, candidate, state);
                if (!file) {
                    return undefined;
                }
            }
            else {
                return undefined;
            }
        }
        var onlyRecordFailures = !directoryProbablyExists(ts.getDirectoryPath(file), state.host);
        var fromFile = tryFile(file, failedLookupLocations, onlyRecordFailures, state);
        if (fromFile) {
            var resolved = resolvedIfExtensionMatches(extensions, fromFile);
            if (resolved) {
                return resolved;
            }
            if (state.traceEnabled) {
                trace(state.host, ts.Diagnostics.File_0_has_an_unsupported_extension_so_skipping_it, fromFile);
            }
        }
        // Even if extensions is DtsOnly, we can still look up a .ts file as a result of package.json "types"
        var nextExtensions = extensions === Extensions.DtsOnly ? Extensions.TypeScript : extensions;
        // Don't do package.json lookup recursively, because Node.js' package lookup doesn't.
        var result = nodeLoadModuleByRelativeName(nextExtensions, file, failedLookupLocations, onlyRecordFailures, state, /*considerPackageJson*/ false);
        if (result) {
            // It won't have a `packageId` set, because we disabled `considerPackageJson`.
            ts.Debug.assert(result.packageId === undefined);
            return { path: result.path, ext: result.extension };
        }
    }
    /** Resolve from an arbitrarily specified file. Return `undefined` if it has an unsupported extension. */
    function resolvedIfExtensionMatches(extensions, path) {
        var ext = ts.tryGetExtensionFromPath(path);
        return ext !== undefined && extensionIsOk(extensions, ext) ? { path: path, ext: ext } : undefined;
    }
    /** True if `extension` is one of the supported `extensions`. */
    function extensionIsOk(extensions, extension) {
        switch (extensions) {
            case Extensions.JavaScript:
                return extension === ".js" /* Js */ || extension === ".jsx" /* Jsx */;
            case Extensions.Json:
                return extension === ".json" /* Json */;
            case Extensions.TypeScript:
                return extension === ".ts" /* Ts */ || extension === ".tsx" /* Tsx */ || extension === ".d.ts" /* Dts */;
            case Extensions.DtsOnly:
                return extension === ".d.ts" /* Dts */;
        }
    }
    function pathToPackageJson(directory) {
        return ts.combinePaths(directory, "package.json");
    }
    function loadModuleFromNodeModulesFolder(extensions, moduleName, nodeModulesFolder, nodeModulesFolderExists, failedLookupLocations, state) {
        var candidate = ts.normalizePath(ts.combinePaths(nodeModulesFolder, moduleName));
        // First look for a nested package.json, as in `node_modules/foo/bar/package.json`.
        var packageJsonContent;
        var packageId;
        var packageInfo = getPackageJsonInfo(candidate, "", failedLookupLocations, /*onlyRecordFailures*/ !nodeModulesFolderExists, state);
        if (packageInfo.found) {
            (packageJsonContent = packageInfo.packageJsonContent, packageId = packageInfo.packageId);
        }
        else {
            var _a = getPackageName(moduleName), packageName = _a.packageName, rest = _a.rest;
            if (rest !== "") { // If "rest" is empty, we just did this search above.
                var packageRootPath = ts.combinePaths(nodeModulesFolder, packageName);
                // Don't use a "types" or "main" from here because we're not loading the root, but a subdirectory -- just here for the packageId.
                packageId = getPackageJsonInfo(packageRootPath, rest, failedLookupLocations, !nodeModulesFolderExists, state).packageId;
            }
        }
        var pathAndExtension = loadModuleFromFile(extensions, candidate, failedLookupLocations, !nodeModulesFolderExists, state) ||
            loadNodeModuleFromDirectoryWorker(extensions, candidate, failedLookupLocations, !nodeModulesFolderExists, state, packageJsonContent);
        return withPackageId(packageId, pathAndExtension);
    }
    /* @internal */
    function getPackageName(moduleName) {
        var idx = moduleName.indexOf(ts.directorySeparator);
        if (moduleName[0] === "@") {
            idx = moduleName.indexOf(ts.directorySeparator, idx + 1);
        }
        return idx === -1 ? { packageName: moduleName, rest: "" } : { packageName: moduleName.slice(0, idx), rest: moduleName.slice(idx + 1) };
    }
    ts.getPackageName = getPackageName;
    function loadModuleFromNodeModules(extensions, moduleName, directory, failedLookupLocations, state, cache) {
        return loadModuleFromNodeModulesWorker(extensions, moduleName, directory, failedLookupLocations, state, /*typesOnly*/ false, cache);
    }
    function loadModuleFromNodeModulesAtTypes(moduleName, directory, failedLookupLocations, state) {
        // Extensions parameter here doesn't actually matter, because typesOnly ensures we're just doing @types lookup, which is always DtsOnly.
        return loadModuleFromNodeModulesWorker(Extensions.DtsOnly, moduleName, directory, failedLookupLocations, state, /*typesOnly*/ true, /*cache*/ undefined);
    }
    function loadModuleFromNodeModulesWorker(extensions, moduleName, directory, failedLookupLocations, state, typesOnly, cache) {
        var perModuleNameCache = cache && cache.getOrCreateCacheForModuleName(moduleName);
        return ts.forEachAncestorDirectory(ts.normalizeSlashes(directory), function (ancestorDirectory) {
            if (ts.getBaseFileName(ancestorDirectory) !== "node_modules") {
                var resolutionFromCache = tryFindNonRelativeModuleNameInCache(perModuleNameCache, moduleName, ancestorDirectory, state.traceEnabled, state.host, failedLookupLocations);
                if (resolutionFromCache) {
                    return resolutionFromCache;
                }
                return toSearchResult(loadModuleFromNodeModulesOneLevel(extensions, moduleName, ancestorDirectory, failedLookupLocations, state, typesOnly));
            }
        });
    }
    /** Load a module from a single node_modules directory, but not from any ancestors' node_modules directories. */
    function loadModuleFromNodeModulesOneLevel(extensions, moduleName, directory, failedLookupLocations, state, typesOnly) {
        if (typesOnly === void 0) { typesOnly = false; }
        var nodeModulesFolder = ts.combinePaths(directory, "node_modules");
        var nodeModulesFolderExists = directoryProbablyExists(nodeModulesFolder, state.host);
        if (!nodeModulesFolderExists && state.traceEnabled) {
            trace(state.host, ts.Diagnostics.Directory_0_does_not_exist_skipping_all_lookups_in_it, nodeModulesFolder);
        }
        var packageResult = typesOnly ? undefined : loadModuleFromNodeModulesFolder(extensions, moduleName, nodeModulesFolder, nodeModulesFolderExists, failedLookupLocations, state);
        if (packageResult) {
            return packageResult;
        }
        if (extensions !== Extensions.JavaScript && extensions !== Extensions.Json) {
            var nodeModulesAtTypes_1 = ts.combinePaths(nodeModulesFolder, "@types");
            var nodeModulesAtTypesExists = nodeModulesFolderExists;
            if (nodeModulesFolderExists && !directoryProbablyExists(nodeModulesAtTypes_1, state.host)) {
                if (state.traceEnabled) {
                    trace(state.host, ts.Diagnostics.Directory_0_does_not_exist_skipping_all_lookups_in_it, nodeModulesAtTypes_1);
                }
                nodeModulesAtTypesExists = false;
            }
            return loadModuleFromNodeModulesFolder(Extensions.DtsOnly, mangleScopedPackage(moduleName, state), nodeModulesAtTypes_1, nodeModulesAtTypesExists, failedLookupLocations, state);
        }
    }
    /** Double underscores are used in DefinitelyTyped to delimit scoped packages. */
    var mangledScopedPackageSeparator = "__";
    /** For a scoped package, we must look in `@types/foo__bar` instead of `@types/@foo/bar`. */
    function mangleScopedPackage(packageName, state) {
        var mangled = getMangledNameForScopedPackage(packageName);
        if (state.traceEnabled && mangled !== packageName) {
            trace(state.host, ts.Diagnostics.Scoped_package_detected_looking_in_0, mangled);
        }
        return mangled;
    }
    /* @internal */
    function getTypesPackageName(packageName) {
        return "@types/" + getMangledNameForScopedPackage(packageName);
    }
    ts.getTypesPackageName = getTypesPackageName;
    /* @internal */
    function getMangledNameForScopedPackage(packageName) {
        if (ts.startsWith(packageName, "@")) {
            var replaceSlash = packageName.replace(ts.directorySeparator, mangledScopedPackageSeparator);
            if (replaceSlash !== packageName) {
                return replaceSlash.slice(1); // Take off the "@"
            }
        }
        return packageName;
    }
    ts.getMangledNameForScopedPackage = getMangledNameForScopedPackage;
    /* @internal */
    function getPackageNameFromAtTypesDirectory(mangledName) {
        var withoutAtTypePrefix = ts.removePrefix(mangledName, "@types/");
        if (withoutAtTypePrefix !== mangledName) {
            return getUnmangledNameForScopedPackage(withoutAtTypePrefix);
        }
        return mangledName;
    }
    ts.getPackageNameFromAtTypesDirectory = getPackageNameFromAtTypesDirectory;
    /* @internal */
    function getUnmangledNameForScopedPackage(typesPackageName) {
        return ts.stringContains(typesPackageName, mangledScopedPackageSeparator) ?
            "@" + typesPackageName.replace(mangledScopedPackageSeparator, ts.directorySeparator) :
            typesPackageName;
    }
    ts.getUnmangledNameForScopedPackage = getUnmangledNameForScopedPackage;
    function tryFindNonRelativeModuleNameInCache(cache, moduleName, containingDirectory, traceEnabled, host, failedLookupLocations) {
        var result = cache && cache.get(containingDirectory);
        if (result) {
            if (traceEnabled) {
                trace(host, ts.Diagnostics.Resolution_for_module_0_was_found_in_cache_from_location_1, moduleName, containingDirectory);
            }
            failedLookupLocations.push.apply(failedLookupLocations, result.failedLookupLocations);
            return { value: result.resolvedModule && { path: result.resolvedModule.resolvedFileName, extension: result.resolvedModule.extension, packageId: result.resolvedModule.packageId } };
        }
    }
    function classicNameResolver(moduleName, containingFile, compilerOptions, host, cache) {
        var traceEnabled = isTraceEnabled(compilerOptions, host);
        var state = { compilerOptions: compilerOptions, host: host, traceEnabled: traceEnabled };
        var failedLookupLocations = [];
        var containingDirectory = ts.getDirectoryPath(containingFile);
        var resolved = tryResolve(Extensions.TypeScript) || tryResolve(Extensions.JavaScript);
        // No originalPath because classic resolution doesn't resolve realPath
        return createResolvedModuleWithFailedLookupLocations(resolved && resolved.value, /*originalPath*/ undefined, /*isExternalLibraryImport*/ false, failedLookupLocations);
        function tryResolve(extensions) {
            var resolvedUsingSettings = tryLoadModuleUsingOptionalResolutionSettings(extensions, moduleName, containingDirectory, loadModuleFromFileNoPackageId, failedLookupLocations, state);
            if (resolvedUsingSettings) {
                return { value: resolvedUsingSettings };
            }
            var perModuleNameCache = cache && cache.getOrCreateCacheForModuleName(moduleName);
            if (!ts.isExternalModuleNameRelative(moduleName)) {
                // Climb up parent directories looking for a module.
                var resolved_3 = ts.forEachAncestorDirectory(containingDirectory, function (directory) {
                    var resolutionFromCache = tryFindNonRelativeModuleNameInCache(perModuleNameCache, moduleName, directory, traceEnabled, host, failedLookupLocations);
                    if (resolutionFromCache) {
                        return resolutionFromCache;
                    }
                    var searchName = ts.normalizePath(ts.combinePaths(directory, moduleName));
                    return toSearchResult(loadModuleFromFileNoPackageId(extensions, searchName, failedLookupLocations, /*onlyRecordFailures*/ false, state));
                });
                if (resolved_3) {
                    return resolved_3;
                }
                if (extensions === Extensions.TypeScript) {
                    // If we didn't find the file normally, look it up in @types.
                    return loadModuleFromNodeModulesAtTypes(moduleName, containingDirectory, failedLookupLocations, state);
                }
            }
            else {
                var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
                return toSearchResult(loadModuleFromFileNoPackageId(extensions, candidate, failedLookupLocations, /*onlyRecordFailures*/ false, state));
            }
        }
    }
    ts.classicNameResolver = classicNameResolver;
    /**
     * LSHost may load a module from a global cache of typings.
     * This is the minumum code needed to expose that functionality; the rest is in LSHost.
     */
    /* @internal */
    function loadModuleFromGlobalCache(moduleName, projectName, compilerOptions, host, globalCache) {
        var traceEnabled = isTraceEnabled(compilerOptions, host);
        if (traceEnabled) {
            trace(host, ts.Diagnostics.Auto_discovery_for_typings_is_enabled_in_project_0_Running_extra_resolution_pass_for_module_1_using_cache_location_2, projectName, moduleName, globalCache);
        }
        var state = { compilerOptions: compilerOptions, host: host, traceEnabled: traceEnabled };
        var failedLookupLocations = [];
        var resolved = loadModuleFromNodeModulesOneLevel(Extensions.DtsOnly, moduleName, globalCache, failedLookupLocations, state);
        return createResolvedModuleWithFailedLookupLocations(resolved, /*originalPath*/ undefined, /*isExternalLibraryImport*/ true, failedLookupLocations);
    }
    ts.loadModuleFromGlobalCache = loadModuleFromGlobalCache;
    /**
     * Wraps value to SearchResult.
     * @returns undefined if value is undefined or { value } otherwise
     */
    function toSearchResult(value) {
        return value !== undefined ? { value: value } : undefined;
    }
})(ts || (ts = {}));
//# sourceMappingURL=parser.js.map
"use strict";
var ts;
(function (ts) {
    var server;
    (function (server) {
        // tslint:disable variable-name
        server.ActionSet = "action::set";
        server.ActionInvalidate = "action::invalidate";
        server.ActionPackageInstalled = "action::packageInstalled";
        server.EventTypesRegistry = "event::typesRegistry";
        server.EventBeginInstallTypes = "event::beginInstallTypes";
        server.EventEndInstallTypes = "event::endInstallTypes";
        server.EventInitializationFailed = "event::initializationFailed";
        var Arguments;
        (function (Arguments) {
            Arguments.GlobalCacheLocation = "--globalTypingsCacheLocation";
            Arguments.LogFile = "--logFile";
            Arguments.EnableTelemetry = "--enableTelemetry";
            Arguments.TypingSafeListLocation = "--typingSafeListLocation";
            Arguments.TypesMapLocation = "--typesMapLocation";
            /**
             * This argument specifies the location of the NPM executable.
             * typingsInstaller will run the command with `${npmLocation} install ...`.
             */
            Arguments.NpmLocation = "--npmLocation";
        })(Arguments = server.Arguments || (server.Arguments = {}));
        function hasArgument(argumentName) {
            return ts.sys.args.indexOf(argumentName) >= 0;
        }
        server.hasArgument = hasArgument;
        function findArgument(argumentName) {
            var index = ts.sys.args.indexOf(argumentName);
            return index >= 0 && index < ts.sys.args.length - 1
                ? ts.sys.args[index + 1]
                : undefined;
        }
        server.findArgument = findArgument;
        /*@internal*/
        function nowString() {
            // E.g. "12:34:56.789"
            var d = new Date();
            return d.getHours() + ":" + d.getMinutes() + ":" + d.getSeconds() + "." + d.getMilliseconds();
        }
        server.nowString = nowString;
    })(server = ts.server || (ts.server = {}));
})(ts || (ts = {}));
/* @internal */
var ts;
(function (ts) {
    var JsTyping;
    (function (JsTyping) {
        /* @internal */
        function isTypingUpToDate(cachedTyping, availableTypingVersions) {
            var availableVersion = ts.Semver.parse(ts.getProperty(availableTypingVersions, "ts" + ts.versionMajorMinor) || ts.getProperty(availableTypingVersions, "latest"));
            return !availableVersion.greaterThan(cachedTyping.version);
        }
        JsTyping.isTypingUpToDate = isTypingUpToDate;
        /* @internal */
        JsTyping.nodeCoreModuleList = [
            "assert",
            "async_hooks",
            "buffer",
            "child_process",
            "cluster",
            "console",
            "constants",
            "crypto",
            "dgram",
            "dns",
            "domain",
            "events",
            "fs",
            "http",
            "https",
            "http2",
            "inspector",
            "net",
            "os",
            "path",
            "perf_hooks",
            "process",
            "punycode",
            "querystring",
            "readline",
            "repl",
            "stream",
            "string_decoder",
            "timers",
            "tls",
            "tty",
            "url",
            "util",
            "v8",
            "vm",
            "zlib"
        ];
        /* @internal */
        JsTyping.nodeCoreModules = ts.arrayToSet(JsTyping.nodeCoreModuleList);
        function loadSafeList(host, safeListPath) {
            var result = ts.readConfigFile(safeListPath, function (path) { return host.readFile(path); });
            return ts.createMapFromTemplate(result.config);
        }
        JsTyping.loadSafeList = loadSafeList;
        function loadTypesMap(host, typesMapPath) {
            var result = ts.readConfigFile(typesMapPath, function (path) { return host.readFile(path); });
            if (result.config) {
                return ts.createMapFromTemplate(result.config.simpleMap);
            }
            return undefined;
        }
        JsTyping.loadTypesMap = loadTypesMap;
        /**
         * @param host is the object providing I/O related operations.
         * @param fileNames are the file names that belong to the same project
         * @param projectRootPath is the path to the project root directory
         * @param safeListPath is the path used to retrieve the safe list
         * @param packageNameToTypingLocation is the map of package names to their cached typing locations and installed versions
         * @param typeAcquisition is used to customize the typing acquisition process
         * @param compilerOptions are used as a source for typing inference
         */
        function discoverTypings(host, log, fileNames, projectRootPath, safeList, packageNameToTypingLocation, typeAcquisition, unresolvedImports, typesRegistry) {
            if (!typeAcquisition || !typeAcquisition.enable) {
                return { cachedTypingPaths: [], newTypingNames: [], filesToWatch: [] };
            }
            // A typing name to typing file path mapping
            var inferredTypings = ts.createMap();
            // Only infer typings for .js and .jsx files
            fileNames = ts.mapDefined(fileNames, function (fileName) {
                var path = ts.normalizePath(fileName);
                if (ts.hasJavaScriptFileExtension(path)) {
                    return path;
                }
            });
            var filesToWatch = [];
            if (typeAcquisition.include)
                addInferredTypings(typeAcquisition.include, "Explicitly included types");
            var exclude = typeAcquisition.exclude || [];
            // Directories to search for package.json, bower.json and other typing information
            var possibleSearchDirs = ts.arrayToSet(fileNames, ts.getDirectoryPath);
            possibleSearchDirs.set(projectRootPath, true);
            possibleSearchDirs.forEach(function (_true, searchDir) {
                var packageJsonPath = ts.combinePaths(searchDir, "package.json");
                getTypingNamesFromJson(packageJsonPath, filesToWatch);
                var bowerJsonPath = ts.combinePaths(searchDir, "bower.json");
                getTypingNamesFromJson(bowerJsonPath, filesToWatch);
                var bowerComponentsPath = ts.combinePaths(searchDir, "bower_components");
                getTypingNamesFromPackagesFolder(bowerComponentsPath, filesToWatch);
                var nodeModulesPath = ts.combinePaths(searchDir, "node_modules");
                getTypingNamesFromPackagesFolder(nodeModulesPath, filesToWatch);
            });
            getTypingNamesFromSourceFileNames(fileNames);
            // add typings for unresolved imports
            if (unresolvedImports) {
                var module_1 = ts.deduplicate(unresolvedImports.map(function (moduleId) { return JsTyping.nodeCoreModules.has(moduleId) ? "node" : moduleId; }), ts.equateStringsCaseSensitive, ts.compareStringsCaseSensitive);
                addInferredTypings(module_1, "Inferred typings from unresolved imports");
            }
            // Add the cached typing locations for inferred typings that are already installed
            packageNameToTypingLocation.forEach(function (typing, name) {
                var registryEntry = typesRegistry.get(name);
                if (inferredTypings.has(name) && inferredTypings.get(name) === undefined && registryEntry !== undefined && isTypingUpToDate(typing, registryEntry)) {
                    inferredTypings.set(name, typing.typingLocation);
                }
            });
            // Remove typings that the user has added to the exclude list
            for (var _i = 0, exclude_1 = exclude; _i < exclude_1.length; _i++) {
                var excludeTypingName = exclude_1[_i];
                var didDelete = inferredTypings.delete(excludeTypingName);
                if (didDelete && log)
                    log("Typing for " + excludeTypingName + " is in exclude list, will be ignored.");
            }
            var newTypingNames = [];
            var cachedTypingPaths = [];
            inferredTypings.forEach(function (inferred, typing) {
                if (inferred !== undefined) {
                    cachedTypingPaths.push(inferred);
                }
                else {
                    newTypingNames.push(typing);
                }
            });
            var result = { cachedTypingPaths: cachedTypingPaths, newTypingNames: newTypingNames, filesToWatch: filesToWatch };
            if (log)
                log("Result: " + JSON.stringify(result));
            return result;
            function addInferredTyping(typingName) {
                if (!inferredTypings.has(typingName)) {
                    inferredTypings.set(typingName, undefined); // TODO: GH#18217
                }
            }
            function addInferredTypings(typingNames, message) {
                if (log)
                    log(message + ": " + JSON.stringify(typingNames));
                ts.forEach(typingNames, addInferredTyping);
            }
            /**
             * Get the typing info from common package manager json files like package.json or bower.json
             */
            function getTypingNamesFromJson(jsonPath, filesToWatch) {
                if (!host.fileExists(jsonPath)) {
                    return;
                }
                filesToWatch.push(jsonPath);
                var jsonConfig = ts.readConfigFile(jsonPath, function (path) { return host.readFile(path); }).config;
                var jsonTypingNames = ts.flatMap([jsonConfig.dependencies, jsonConfig.devDependencies, jsonConfig.optionalDependencies, jsonConfig.peerDependencies], ts.getOwnKeys);
                addInferredTypings(jsonTypingNames, "Typing names in '" + jsonPath + "' dependencies");
            }
            /**
             * Infer typing names from given file names. For example, the file name "jquery-min.2.3.4.js"
             * should be inferred to the 'jquery' typing name; and "angular-route.1.2.3.js" should be inferred
             * to the 'angular-route' typing name.
             * @param fileNames are the names for source files in the project
             */
            function getTypingNamesFromSourceFileNames(fileNames) {
                var fromFileNames = ts.mapDefined(fileNames, function (j) {
                    if (!ts.hasJavaScriptFileExtension(j))
                        return undefined;
                    var inferredTypingName = ts.removeFileExtension(ts.getBaseFileName(j.toLowerCase()));
                    var cleanedTypingName = ts.removeMinAndVersionNumbers(inferredTypingName);
                    return safeList.get(cleanedTypingName);
                });
                if (fromFileNames.length) {
                    addInferredTypings(fromFileNames, "Inferred typings from file names");
                }
                var hasJsxFile = ts.some(fileNames, function (f) { return ts.fileExtensionIs(f, ".jsx" /* Jsx */); });
                if (hasJsxFile) {
                    if (log)
                        log("Inferred 'react' typings due to presence of '.jsx' extension");
                    addInferredTyping("react");
                }
            }
            /**
             * Infer typing names from packages folder (ex: node_module, bower_components)
             * @param packagesFolderPath is the path to the packages folder
             */
            function getTypingNamesFromPackagesFolder(packagesFolderPath, filesToWatch) {
                filesToWatch.push(packagesFolderPath);
                // Todo: add support for ModuleResolutionHost too
                if (!host.directoryExists(packagesFolderPath)) {
                    return;
                }
                // depth of 2, so we access `node_modules/foo` but not `node_modules/foo/bar`
                var fileNames = host.readDirectory(packagesFolderPath, [".json" /* Json */], /*excludes*/ undefined, /*includes*/ undefined, /*depth*/ 2);
                if (log)
                    log("Searching for typing names in " + packagesFolderPath + "; all files: " + JSON.stringify(fileNames));
                var packageNames = [];
                for (var _i = 0, fileNames_1 = fileNames; _i < fileNames_1.length; _i++) {
                    var fileName = fileNames_1[_i];
                    var normalizedFileName = ts.normalizePath(fileName);
                    var baseFileName = ts.getBaseFileName(normalizedFileName);
                    if (baseFileName !== "package.json" && baseFileName !== "bower.json") {
                        continue;
                    }
                    var result_1 = ts.readConfigFile(normalizedFileName, function (path) { return host.readFile(path); });
                    var packageJson = result_1.config;
                    // npm 3's package.json contains a "_requiredBy" field
                    // we should include all the top level module names for npm 2, and only module names whose
                    // "_requiredBy" field starts with "#" or equals "/" for npm 3.
                    if (baseFileName === "package.json" && packageJson._requiredBy &&
                        ts.filter(packageJson._requiredBy, function (r) { return r[0] === "#" || r === "/"; }).length === 0) {
                        continue;
                    }
                    // If the package has its own d.ts typings, those will take precedence. Otherwise the package name will be used
                    // to download d.ts files from DefinitelyTyped
                    if (!packageJson.name) {
                        continue;
                    }
                    var ownTypes = packageJson.types || packageJson.typings;
                    if (ownTypes) {
                        var absolutePath = ts.getNormalizedAbsolutePath(ownTypes, ts.getDirectoryPath(normalizedFileName));
                        if (log)
                            log("    Package '" + packageJson.name + "' provides its own types.");
                        inferredTypings.set(packageJson.name, absolutePath);
                    }
                    else {
                        packageNames.push(packageJson.name);
                    }
                }
                addInferredTypings(packageNames, "    Found package names");
            }
        }
        JsTyping.discoverTypings = discoverTypings;
        var PackageNameValidationResult;
        (function (PackageNameValidationResult) {
            PackageNameValidationResult[PackageNameValidationResult["Ok"] = 0] = "Ok";
            PackageNameValidationResult[PackageNameValidationResult["ScopedPackagesNotSupported"] = 1] = "ScopedPackagesNotSupported";
            PackageNameValidationResult[PackageNameValidationResult["EmptyName"] = 2] = "EmptyName";
            PackageNameValidationResult[PackageNameValidationResult["NameTooLong"] = 3] = "NameTooLong";
            PackageNameValidationResult[PackageNameValidationResult["NameStartsWithDot"] = 4] = "NameStartsWithDot";
            PackageNameValidationResult[PackageNameValidationResult["NameStartsWithUnderscore"] = 5] = "NameStartsWithUnderscore";
            PackageNameValidationResult[PackageNameValidationResult["NameContainsNonURISafeCharacters"] = 6] = "NameContainsNonURISafeCharacters";
        })(PackageNameValidationResult = JsTyping.PackageNameValidationResult || (JsTyping.PackageNameValidationResult = {}));
        var maxPackageNameLength = 214;
        /**
         * Validates package name using rules defined at https://docs.npmjs.com/files/package.json
         */
        function validatePackageName(packageName) {
            if (!packageName) {
                return 2 /* EmptyName */;
            }
            if (packageName.length > maxPackageNameLength) {
                return 3 /* NameTooLong */;
            }
            if (packageName.charCodeAt(0) === 46 /* dot */) {
                return 4 /* NameStartsWithDot */;
            }
            if (packageName.charCodeAt(0) === 95 /* _ */) {
                return 5 /* NameStartsWithUnderscore */;
            }
            // check if name is scope package like: starts with @ and has one '/' in the middle
            // scoped packages are not currently supported
            // TODO: when support will be added we'll need to split and check both scope and package name
            if (/^@[^/]+\/[^/]+$/.test(packageName)) {
                return 1 /* ScopedPackagesNotSupported */;
            }
            if (encodeURIComponent(packageName) !== packageName) {
                return 6 /* NameContainsNonURISafeCharacters */;
            }
            return 0 /* Ok */;
        }
        JsTyping.validatePackageName = validatePackageName;
        function renderPackageNameValidationFailure(result, typing) {
            switch (result) {
                case 2 /* EmptyName */:
                    return "Package name '" + typing + "' cannot be empty";
                case 3 /* NameTooLong */:
                    return "Package name '" + typing + "' should be less than " + maxPackageNameLength + " characters";
                case 4 /* NameStartsWithDot */:
                    return "Package name '" + typing + "' cannot start with '.'";
                case 5 /* NameStartsWithUnderscore */:
                    return "Package name '" + typing + "' cannot start with '_'";
                case 1 /* ScopedPackagesNotSupported */:
                    return "Package '" + typing + "' is scoped and currently is not supported";
                case 6 /* NameContainsNonURISafeCharacters */:
                    return "Package name '" + typing + "' contains non URI safe characters";
                case 0 /* Ok */:
                    return ts.Debug.fail(); // Shouldn't have called this.
                default:
                    throw ts.Debug.assertNever(result);
            }
        }
        JsTyping.renderPackageNameValidationFailure = renderPackageNameValidationFailure;
    })(JsTyping = ts.JsTyping || (ts.JsTyping = {}));
})(ts || (ts = {}));
/* @internal */
var ts;
(function (ts) {
    function stringToInt(str) {
        var n = parseInt(str, 10);
        if (isNaN(n)) {
            throw new Error("Error in parseInt(" + JSON.stringify(str) + ")");
        }
        return n;
    }
    var isPrereleaseRegex = /^(.*)-next.\d+/;
    var prereleaseSemverRegex = /^(\d+)\.(\d+)\.0-next.(\d+)$/;
    var semverRegex = /^(\d+)\.(\d+)\.(\d+)$/;
    var Semver = /** @class */ (function () {
        function Semver(major, minor, patch, 
        /**
         * If true, this is `major.minor.0-next.patch`.
         * If false, this is `major.minor.patch`.
         */
        isPrerelease) {
            this.major = major;
            this.minor = minor;
            this.patch = patch;
            this.isPrerelease = isPrerelease;
        }
        Semver.parse = function (semver) {
            var isPrerelease = isPrereleaseRegex.test(semver);
            var result = Semver.tryParse(semver, isPrerelease);
            if (!result) {
                throw new Error("Unexpected semver: " + semver + " (isPrerelease: " + isPrerelease + ")");
            }
            return result;
        };
        Semver.fromRaw = function (_a) {
            var major = _a.major, minor = _a.minor, patch = _a.patch, isPrerelease = _a.isPrerelease;
            return new Semver(major, minor, patch, isPrerelease);
        };
        // This must parse the output of `versionString`.
        Semver.tryParse = function (semver, isPrerelease) {
            // Per the semver spec <http://semver.org/#spec-item-2>:
            // "A normal version number MUST take the form X.Y.Z where X, Y, and Z are non-negative integers, and MUST NOT contain leading zeroes."
            var rgx = isPrerelease ? prereleaseSemverRegex : semverRegex;
            var match = rgx.exec(semver);
            return match ? new Semver(stringToInt(match[1]), stringToInt(match[2]), stringToInt(match[3]), isPrerelease) : undefined;
        };
        Object.defineProperty(Semver.prototype, "versionString", {
            get: function () {
                return this.isPrerelease ? this.major + "." + this.minor + ".0-next." + this.patch : this.major + "." + this.minor + "." + this.patch;
            },
            enumerable: true,
            configurable: true
        });
        Semver.prototype.equals = function (sem) {
            return this.major === sem.major && this.minor === sem.minor && this.patch === sem.patch && this.isPrerelease === sem.isPrerelease;
        };
        Semver.prototype.greaterThan = function (sem) {
            return this.major > sem.major || this.major === sem.major
                && (this.minor > sem.minor || this.minor === sem.minor
                    && (!this.isPrerelease && sem.isPrerelease || this.isPrerelease === sem.isPrerelease
                        && this.patch > sem.patch));
        };
        return Semver;
    }());
    ts.Semver = Semver;
})(ts || (ts = {}));
//# sourceMappingURL=jsTyping.js.map
"use strict";
var ts;
(function (ts) {
    var server;
    (function (server) {
        var typingsInstaller;
        (function (typingsInstaller) {
            var nullLog = {
                isEnabled: function () { return false; },
                writeLine: ts.noop
            };
            function typingToFileName(cachePath, packageName, installTypingHost, log) {
                try {
                    var result = ts.resolveModuleName(packageName, ts.combinePaths(cachePath, "index.d.ts"), { moduleResolution: ts.ModuleResolutionKind.NodeJs }, installTypingHost);
                    return result.resolvedModule && result.resolvedModule.resolvedFileName;
                }
                catch (e) {
                    if (log.isEnabled()) {
                        log.writeLine("Failed to resolve " + packageName + " in folder '" + cachePath + "': " + e.message);
                    }
                    return undefined;
                }
            }
            /*@internal*/
            function installNpmPackages(npmPath, tsVersion, packageNames, install) {
                var hasError = false;
                for (var remaining = packageNames.length; remaining > 0;) {
                    var result = getNpmCommandForInstallation(npmPath, tsVersion, packageNames, remaining);
                    remaining = result.remaining;
                    hasError = install(result.command) || hasError;
                }
                return hasError;
            }
            typingsInstaller.installNpmPackages = installNpmPackages;
            /*@internal*/
            function getNpmCommandForInstallation(npmPath, tsVersion, packageNames, remaining) {
                var sliceStart = packageNames.length - remaining;
                var command, toSlice = remaining;
                while (true) {
                    command = npmPath + " install --ignore-scripts " + (toSlice === packageNames.length ? packageNames : packageNames.slice(sliceStart, sliceStart + toSlice)).join(" ") + " --save-dev --user-agent=\"typesInstaller/" + tsVersion + "\"";
                    if (command.length < 8000) {
                        break;
                    }
                    toSlice = toSlice - Math.floor(toSlice / 2);
                }
                return { command: command, remaining: remaining - toSlice };
            }
            typingsInstaller.getNpmCommandForInstallation = getNpmCommandForInstallation;
            function isPackageOrBowerJson(fileName) {
                var base = ts.getBaseFileName(fileName);
                return base === "package.json" || base === "bower.json";
            }
            function getDirectoryExcludingNodeModulesOrBowerComponents(f) {
                var indexOfNodeModules = f.indexOf("/node_modules/");
                var indexOfBowerComponents = f.indexOf("/bower_components/");
                var subStrLength = indexOfNodeModules === -1 || indexOfBowerComponents === -1 ?
                    Math.max(indexOfNodeModules, indexOfBowerComponents) :
                    Math.min(indexOfNodeModules, indexOfBowerComponents);
                return subStrLength === -1 ? f : f.substr(0, subStrLength);
            }
            var TypingsInstaller = /** @class */ (function () {
                function TypingsInstaller(installTypingHost, globalCachePath, safeListPath, typesMapLocation, throttleLimit, log) {
                    if (log === void 0) { log = nullLog; }
                    this.installTypingHost = installTypingHost;
                    this.globalCachePath = globalCachePath;
                    this.safeListPath = safeListPath;
                    this.typesMapLocation = typesMapLocation;
                    this.throttleLimit = throttleLimit;
                    this.log = log;
                    this.packageNameToTypingLocation = ts.createMap();
                    this.missingTypingsSet = ts.createMap();
                    this.knownCachesSet = ts.createMap();
                    this.projectWatchers = ts.createMap();
                    this.pendingRunRequests = [];
                    this.installRunCount = 1;
                    this.inFlightRequestCount = 0;
                    this.latestDistTag = "latest";
                    this.toCanonicalFileName = ts.createGetCanonicalFileName(installTypingHost.useCaseSensitiveFileNames);
                    this.globalCacheCanonicalPackageJsonPath = ts.combinePaths(this.toCanonicalFileName(globalCachePath), "package.json");
                    if (this.log.isEnabled()) {
                        this.log.writeLine("Global cache location '" + globalCachePath + "', safe file path '" + safeListPath + "', types map path " + typesMapLocation);
                    }
                    this.processCacheLocation(this.globalCachePath);
                }
                TypingsInstaller.prototype.closeProject = function (req) {
                    this.closeWatchers(req.projectName);
                };
                TypingsInstaller.prototype.closeWatchers = function (projectName) {
                    if (this.log.isEnabled()) {
                        this.log.writeLine("Closing file watchers for project '" + projectName + "'");
                    }
                    var watchers = this.projectWatchers.get(projectName);
                    if (!watchers) {
                        if (this.log.isEnabled()) {
                            this.log.writeLine("No watchers are registered for project '" + projectName + "'");
                        }
                        return;
                    }
                    ts.clearMap(watchers, ts.closeFileWatcher);
                    this.projectWatchers.delete(projectName);
                    if (this.log.isEnabled()) {
                        this.log.writeLine("Closing file watchers for project '" + projectName + "' - done.");
                    }
                };
                TypingsInstaller.prototype.install = function (req) {
                    var _this = this;
                    if (this.log.isEnabled()) {
                        this.log.writeLine("Got install request " + JSON.stringify(req));
                    }
                    // load existing typing information from the cache
                    if (req.cachePath) {
                        if (this.log.isEnabled()) {
                            this.log.writeLine("Request specifies cache path '" + req.cachePath + "', loading cached information...");
                        }
                        this.processCacheLocation(req.cachePath);
                    }
                    if (this.safeList === undefined) {
                        this.initializeSafeList();
                    }
                    var discoverTypingsResult = ts.JsTyping.discoverTypings(this.installTypingHost, this.log.isEnabled() ? (function (s) { return _this.log.writeLine(s); }) : undefined, req.fileNames, req.projectRootPath, this.safeList, this.packageNameToTypingLocation, req.typeAcquisition, req.unresolvedImports, this.typesRegistry);
                    if (this.log.isEnabled()) {
                        this.log.writeLine("Finished typings discovery: " + JSON.stringify(discoverTypingsResult));
                    }
                    // start watching files
                    this.watchFiles(req.projectName, discoverTypingsResult.filesToWatch, req.projectRootPath);
                    // install typings
                    if (discoverTypingsResult.newTypingNames.length) {
                        this.installTypings(req, req.cachePath || this.globalCachePath, discoverTypingsResult.cachedTypingPaths, discoverTypingsResult.newTypingNames);
                    }
                    else {
                        this.sendResponse(this.createSetTypings(req, discoverTypingsResult.cachedTypingPaths));
                        if (this.log.isEnabled()) {
                            this.log.writeLine("No new typings were requested as a result of typings discovery");
                        }
                    }
                };
                TypingsInstaller.prototype.initializeSafeList = function () {
                    // Prefer the safe list from the types map if it exists
                    if (this.typesMapLocation) {
                        var safeListFromMap = ts.JsTyping.loadTypesMap(this.installTypingHost, this.typesMapLocation);
                        if (safeListFromMap) {
                            this.log.writeLine("Loaded safelist from types map file '" + this.typesMapLocation + "'");
                            this.safeList = safeListFromMap;
                            return;
                        }
                        this.log.writeLine("Failed to load safelist from types map file '" + this.typesMapLocation + "'");
                    }
                    this.safeList = ts.JsTyping.loadSafeList(this.installTypingHost, this.safeListPath);
                };
                TypingsInstaller.prototype.processCacheLocation = function (cacheLocation) {
                    if (this.log.isEnabled()) {
                        this.log.writeLine("Processing cache location '" + cacheLocation + "'");
                    }
                    if (this.knownCachesSet.has(cacheLocation)) {
                        if (this.log.isEnabled()) {
                            this.log.writeLine("Cache location was already processed...");
                        }
                        return;
                    }
                    var packageJson = ts.combinePaths(cacheLocation, "package.json");
                    var packageLockJson = ts.combinePaths(cacheLocation, "package-lock.json");
                    if (this.log.isEnabled()) {
                        this.log.writeLine("Trying to find '" + packageJson + "'...");
                    }
                    if (this.installTypingHost.fileExists(packageJson) && this.installTypingHost.fileExists(packageLockJson)) {
                        var npmConfig = JSON.parse(this.installTypingHost.readFile(packageJson)); // TODO: GH#18217
                        var npmLock = JSON.parse(this.installTypingHost.readFile(packageLockJson)); // TODO: GH#18217
                        if (this.log.isEnabled()) {
                            this.log.writeLine("Loaded content of '" + packageJson + "': " + JSON.stringify(npmConfig));
                            this.log.writeLine("Loaded content of '" + packageLockJson + "'");
                        }
                        if (npmConfig.devDependencies && npmLock.dependencies) {
                            for (var key in npmConfig.devDependencies) {
                                if (!ts.hasProperty(npmLock.dependencies, key)) {
                                    // if package in package.json but not package-lock.json, skip adding to cache so it is reinstalled on next use
                                    continue;
                                }
                                // key is @types/<package name>
                                var packageName = ts.getBaseFileName(key);
                                if (!packageName) {
                                    continue;
                                }
                                var typingFile = typingToFileName(cacheLocation, packageName, this.installTypingHost, this.log);
                                if (!typingFile) {
                                    this.missingTypingsSet.set(packageName, true);
                                    continue;
                                }
                                var existingTypingFile = this.packageNameToTypingLocation.get(packageName);
                                if (existingTypingFile) {
                                    if (existingTypingFile.typingLocation === typingFile) {
                                        continue;
                                    }
                                    if (this.log.isEnabled()) {
                                        this.log.writeLine("New typing for package " + packageName + " from '" + typingFile + "' conflicts with existing typing file '" + existingTypingFile + "'");
                                    }
                                }
                                if (this.log.isEnabled()) {
                                    this.log.writeLine("Adding entry into typings cache: '" + packageName + "' => '" + typingFile + "'");
                                }
                                var info = ts.getProperty(npmLock.dependencies, key);
                                var version_1 = info && info.version;
                                var semver = ts.Semver.parse(version_1); // TODO: GH#18217
                                var newTyping = { typingLocation: typingFile, version: semver };
                                this.packageNameToTypingLocation.set(packageName, newTyping);
                            }
                        }
                    }
                    if (this.log.isEnabled()) {
                        this.log.writeLine("Finished processing cache location '" + cacheLocation + "'");
                    }
                    this.knownCachesSet.set(cacheLocation, true);
                };
                TypingsInstaller.prototype.filterTypings = function (typingsToInstall) {
                    var _this = this;
                    return typingsToInstall.filter(function (typing) {
                        if (_this.missingTypingsSet.get(typing)) {
                            if (_this.log.isEnabled())
                                _this.log.writeLine("'" + typing + "' is in missingTypingsSet - skipping...");
                            return false;
                        }
                        var validationResult = ts.JsTyping.validatePackageName(typing);
                        if (validationResult !== 0 /* Ok */) {
                            // add typing name to missing set so we won't process it again
                            _this.missingTypingsSet.set(typing, true);
                            if (_this.log.isEnabled())
                                _this.log.writeLine(ts.JsTyping.renderPackageNameValidationFailure(validationResult, typing));
                            return false;
                        }
                        if (!_this.typesRegistry.has(typing)) {
                            if (_this.log.isEnabled())
                                _this.log.writeLine("Entry for package '" + typing + "' does not exist in local types registry - skipping...");
                            return false;
                        }
                        if (_this.packageNameToTypingLocation.get(typing) && ts.JsTyping.isTypingUpToDate(_this.packageNameToTypingLocation.get(typing), _this.typesRegistry.get(typing))) {
                            if (_this.log.isEnabled())
                                _this.log.writeLine("'" + typing + "' already has an up-to-date typing - skipping...");
                            return false;
                        }
                        return true;
                    });
                };
                TypingsInstaller.prototype.ensurePackageDirectoryExists = function (directory) {
                    var npmConfigPath = ts.combinePaths(directory, "package.json");
                    if (this.log.isEnabled()) {
                        this.log.writeLine("Npm config file: " + npmConfigPath);
                    }
                    if (!this.installTypingHost.fileExists(npmConfigPath)) {
                        if (this.log.isEnabled()) {
                            this.log.writeLine("Npm config file: '" + npmConfigPath + "' is missing, creating new one...");
                        }
                        this.ensureDirectoryExists(directory, this.installTypingHost);
                        this.installTypingHost.writeFile(npmConfigPath, '{ "private": true }');
                    }
                };
                TypingsInstaller.prototype.installTypings = function (req, cachePath, currentlyCachedTypings, typingsToInstall) {
                    var _this = this;
                    if (this.log.isEnabled()) {
                        this.log.writeLine("Installing typings " + JSON.stringify(typingsToInstall));
                    }
                    var filteredTypings = this.filterTypings(typingsToInstall);
                    if (filteredTypings.length === 0) {
                        if (this.log.isEnabled()) {
                            this.log.writeLine("All typings are known to be missing or invalid - no need to install more typings");
                        }
                        this.sendResponse(this.createSetTypings(req, currentlyCachedTypings));
                        return;
                    }
                    this.ensurePackageDirectoryExists(cachePath);
                    var requestId = this.installRunCount;
                    this.installRunCount++;
                    // send progress event
                    this.sendResponse({
                        kind: server.EventBeginInstallTypes,
                        eventId: requestId,
                        typingsInstallerVersion: ts.version,
                        projectName: req.projectName
                    });
                    var scopedTypings = filteredTypings.map(typingsName);
                    this.installTypingsAsync(requestId, scopedTypings, cachePath, function (ok) {
                        try {
                            if (!ok) {
                                if (_this.log.isEnabled()) {
                                    _this.log.writeLine("install request failed, marking packages as missing to prevent repeated requests: " + JSON.stringify(filteredTypings));
                                }
                                for (var _i = 0, filteredTypings_1 = filteredTypings; _i < filteredTypings_1.length; _i++) {
                                    var typing = filteredTypings_1[_i];
                                    _this.missingTypingsSet.set(typing, true);
                                }
                                return;
                            }
                            // TODO: watch project directory
                            if (_this.log.isEnabled()) {
                                _this.log.writeLine("Installed typings " + JSON.stringify(scopedTypings));
                            }
                            var installedTypingFiles = [];
                            for (var _a = 0, filteredTypings_2 = filteredTypings; _a < filteredTypings_2.length; _a++) {
                                var packageName = filteredTypings_2[_a];
                                var typingFile = typingToFileName(cachePath, packageName, _this.installTypingHost, _this.log);
                                if (!typingFile) {
                                    _this.missingTypingsSet.set(packageName, true);
                                    continue;
                                }
                                // packageName is guaranteed to exist in typesRegistry by filterTypings
                                var distTags = _this.typesRegistry.get(packageName);
                                var newVersion = ts.Semver.parse(distTags["ts" + ts.versionMajorMinor] || distTags[_this.latestDistTag]);
                                var newTyping = { typingLocation: typingFile, version: newVersion };
                                _this.packageNameToTypingLocation.set(packageName, newTyping);
                                installedTypingFiles.push(typingFile);
                            }
                            if (_this.log.isEnabled()) {
                                _this.log.writeLine("Installed typing files " + JSON.stringify(installedTypingFiles));
                            }
                            _this.sendResponse(_this.createSetTypings(req, currentlyCachedTypings.concat(installedTypingFiles)));
                        }
                        finally {
                            var response = {
                                kind: server.EventEndInstallTypes,
                                eventId: requestId,
                                projectName: req.projectName,
                                packagesToInstall: scopedTypings,
                                installSuccess: ok,
                                typingsInstallerVersion: ts.version // tslint:disable-line no-unnecessary-qualifier (qualified explicitly to prevent occasional shadowing)
                            };
                            _this.sendResponse(response);
                        }
                    });
                };
                TypingsInstaller.prototype.ensureDirectoryExists = function (directory, host) {
                    var directoryName = ts.getDirectoryPath(directory);
                    if (!host.directoryExists(directoryName)) {
                        this.ensureDirectoryExists(directoryName, host);
                    }
                    if (!host.directoryExists(directory)) {
                        host.createDirectory(directory);
                    }
                };
                TypingsInstaller.prototype.watchFiles = function (projectName, files, projectRootPath) {
                    var _this = this;
                    if (!files.length) {
                        // shut down existing watchers
                        this.closeWatchers(projectName);
                        return;
                    }
                    var watchers = this.projectWatchers.get(projectName);
                    var toRemove = ts.createMap();
                    if (!watchers) {
                        watchers = ts.createMap();
                        this.projectWatchers.set(projectName, watchers);
                    }
                    else {
                        ts.copyEntries(watchers, toRemove);
                    }
                    // handler should be invoked once for the entire set of files since it will trigger full rediscovery of typings
                    watchers.isInvoked = false;
                    var isLoggingEnabled = this.log.isEnabled();
                    var createProjectWatcher = function (path, createWatch) {
                        toRemove.delete(path);
                        if (watchers.has(path)) {
                            return;
                        }
                        watchers.set(path, createWatch(path));
                    };
                    var createProjectFileWatcher = function (file) {
                        if (isLoggingEnabled) {
                            _this.log.writeLine("FileWatcher:: Added:: WatchInfo: " + file);
                        }
                        var watcher = _this.installTypingHost.watchFile(file, function (f, eventKind) {
                            if (isLoggingEnabled) {
                                _this.log.writeLine("FileWatcher:: Triggered with " + f + " eventKind: " + ts.FileWatcherEventKind[eventKind] + ":: WatchInfo: " + file + ":: handler is already invoked '" + watchers.isInvoked + "'");
                            }
                            if (!watchers.isInvoked) {
                                watchers.isInvoked = true;
                                _this.sendResponse({ projectName: projectName, kind: server.ActionInvalidate });
                            }
                        }, /*pollingInterval*/ 2000);
                        return isLoggingEnabled ? {
                            close: function () {
                                _this.log.writeLine("FileWatcher:: Closed:: WatchInfo: " + file);
                                watcher.close();
                            }
                        } : watcher;
                    };
                    var createProjectDirectoryWatcher = function (dir) {
                        if (isLoggingEnabled) {
                            _this.log.writeLine("DirectoryWatcher:: Added:: WatchInfo: " + dir + " recursive");
                        }
                        var watcher = _this.installTypingHost.watchDirectory(dir, function (f) {
                            if (isLoggingEnabled) {
                                _this.log.writeLine("DirectoryWatcher:: Triggered with " + f + " :: WatchInfo: " + dir + " recursive :: handler is already invoked '" + watchers.isInvoked + "'");
                            }
                            if (watchers.isInvoked) {
                                return;
                            }
                            f = _this.toCanonicalFileName(f);
                            if (f !== _this.globalCacheCanonicalPackageJsonPath && isPackageOrBowerJson(f)) {
                                watchers.isInvoked = true;
                                _this.sendResponse({ projectName: projectName, kind: server.ActionInvalidate });
                            }
                        }, /*recursive*/ true);
                        return isLoggingEnabled ? {
                            close: function () {
                                _this.log.writeLine("DirectoryWatcher:: Closed:: WatchInfo: " + dir + " recursive");
                                watcher.close();
                            }
                        } : watcher;
                    };
                    // Create watches from list of files
                    for (var _i = 0, files_1 = files; _i < files_1.length; _i++) {
                        var file = files_1[_i];
                        var filePath = this.toCanonicalFileName(file);
                        if (isPackageOrBowerJson(filePath)) {
                            // package.json or bower.json exists, watch the file to detect changes and update typings
                            createProjectWatcher(filePath, createProjectFileWatcher);
                            continue;
                        }
                        // path in projectRoot, watch project root
                        if (ts.containsPath(projectRootPath, filePath, projectRootPath, !this.installTypingHost.useCaseSensitiveFileNames)) {
                            createProjectWatcher(projectRootPath, createProjectDirectoryWatcher);
                            continue;
                        }
                        // path in global cache, watch global cache
                        if (ts.containsPath(this.globalCachePath, filePath, projectRootPath, !this.installTypingHost.useCaseSensitiveFileNames)) {
                            createProjectWatcher(this.globalCachePath, createProjectDirectoryWatcher);
                            continue;
                        }
                        // Get path without node_modules and bower_components
                        createProjectWatcher(getDirectoryExcludingNodeModulesOrBowerComponents(ts.getDirectoryPath(filePath)), createProjectDirectoryWatcher);
                    }
                    // Remove unused watches
                    toRemove.forEach(function (watch, path) {
                        watch.close();
                        watchers.delete(path);
                    });
                };
                TypingsInstaller.prototype.createSetTypings = function (request, typings) {
                    return {
                        projectName: request.projectName,
                        typeAcquisition: request.typeAcquisition,
                        compilerOptions: request.compilerOptions,
                        typings: typings,
                        unresolvedImports: request.unresolvedImports,
                        kind: server.ActionSet
                    };
                };
                TypingsInstaller.prototype.installTypingsAsync = function (requestId, packageNames, cwd, onRequestCompleted) {
                    this.pendingRunRequests.unshift({ requestId: requestId, packageNames: packageNames, cwd: cwd, onRequestCompleted: onRequestCompleted });
                    this.executeWithThrottling();
                };
                TypingsInstaller.prototype.executeWithThrottling = function () {
                    var _this = this;
                    var _loop_1 = function () {
                        this_1.inFlightRequestCount++;
                        var request = this_1.pendingRunRequests.pop();
                        this_1.installWorker(request.requestId, request.packageNames, request.cwd, function (ok) {
                            _this.inFlightRequestCount--;
                            request.onRequestCompleted(ok);
                            _this.executeWithThrottling();
                        });
                    };
                    var this_1 = this;
                    while (this.inFlightRequestCount < this.throttleLimit && this.pendingRunRequests.length) {
                        _loop_1();
                    }
                };
                return TypingsInstaller;
            }());
            typingsInstaller.TypingsInstaller = TypingsInstaller;
            /* @internal */
            function typingsName(packageName) {
                return "@types/" + packageName + "@ts" + ts.versionMajorMinor;
            }
            typingsInstaller.typingsName = typingsName;
        })(typingsInstaller = server.typingsInstaller || (server.typingsInstaller = {}));
    })(server = ts.server || (ts.server = {}));
})(ts || (ts = {}));
//# sourceMappingURL=typingsInstallerCore.js.map
var ts;
(function (ts) {
    var server;
    (function (server) {
        var typingsInstaller;
        (function (typingsInstaller) {
            var fs = require("fs");
            var path = require("path");
            var FileLog = (function () {
                function FileLog(logFile) {
                    var _this = this;
                    this.logFile = logFile;
                    this.logEnabled = true;
                    this.isEnabled = function () {
                        return _this.logEnabled && _this.logFile !== undefined;
                    };
                    this.writeLine = function (text) {
                        try {
                            fs.appendFileSync(_this.logFile, "[" + server.nowString() + "] " + text + ts.sys.newLine);
                        }
                        catch (e) {
                            _this.logEnabled = false;
                        }
                    };
                }
                return FileLog;
            }());
            function getDefaultNPMLocation(processName) {
                if (path.basename(processName).indexOf("node") === 0) {
                    return "\"" + path.join(path.dirname(process.argv[0]), "npm") + "\"";
                }
                else {
                    return "npm";
                }
            }
            function loadTypesRegistryFile(typesRegistryFilePath, host, log) {
                if (!host.fileExists(typesRegistryFilePath)) {
                    if (log.isEnabled()) {
                        log.writeLine("Types registry file '" + typesRegistryFilePath + "' does not exist");
                    }
                    return ts.createMap();
                }
                try {
                    var content = JSON.parse(host.readFile(typesRegistryFilePath));
                    return ts.createMapFromTemplate(content.entries);
                }
                catch (e) {
                    if (log.isEnabled()) {
                        log.writeLine("Error when loading types registry file '" + typesRegistryFilePath + "': " + e.message + ", " + e.stack);
                    }
                    return ts.createMap();
                }
            }
            var typesRegistryPackageName = "types-registry";
            function getTypesRegistryFileLocation(globalTypingsCacheLocation) {
                return ts.combinePaths(ts.normalizeSlashes(globalTypingsCacheLocation), "node_modules/" + typesRegistryPackageName + "/index.json");
            }
            var NodeTypingsInstaller = (function (_super) {
                __extends(NodeTypingsInstaller, _super);
                function NodeTypingsInstaller(globalTypingsCacheLocation, typingSafeListLocation, typesMapLocation, npmLocation, throttleLimit, log) {
                    var _this = _super.call(this, ts.sys, globalTypingsCacheLocation, typingSafeListLocation ? ts.toPath(typingSafeListLocation, "", ts.createGetCanonicalFileName(ts.sys.useCaseSensitiveFileNames)) : ts.toPath("typingSafeList.json", __dirname, ts.createGetCanonicalFileName(ts.sys.useCaseSensitiveFileNames)), typesMapLocation ? ts.toPath(typesMapLocation, "", ts.createGetCanonicalFileName(ts.sys.useCaseSensitiveFileNames)) : ts.toPath("typesMap.json", __dirname, ts.createGetCanonicalFileName(ts.sys.useCaseSensitiveFileNames)), throttleLimit, log) || this;
                    _this.npmPath = npmLocation !== undefined ? npmLocation : getDefaultNPMLocation(process.argv[0]);
                    if (ts.stringContains(_this.npmPath, " ") && _this.npmPath[0] !== "\"") {
                        _this.npmPath = "\"" + _this.npmPath + "\"";
                    }
                    if (_this.log.isEnabled()) {
                        _this.log.writeLine("Process id: " + process.pid);
                        _this.log.writeLine("NPM location: " + _this.npmPath + " (explicit '" + server.Arguments.NpmLocation + "' " + (npmLocation === undefined ? "not " : "") + " provided)");
                    }
                    (_this.nodeExecSync = require("child_process").execSync);
                    _this.ensurePackageDirectoryExists(globalTypingsCacheLocation);
                    try {
                        if (_this.log.isEnabled()) {
                            _this.log.writeLine("Updating " + typesRegistryPackageName + " npm package...");
                        }
                        _this.execSyncAndLog(_this.npmPath + " install --ignore-scripts " + typesRegistryPackageName + "@" + _this.latestDistTag, { cwd: globalTypingsCacheLocation });
                        if (_this.log.isEnabled()) {
                            _this.log.writeLine("Updated " + typesRegistryPackageName + " npm package");
                        }
                    }
                    catch (e) {
                        if (_this.log.isEnabled()) {
                            _this.log.writeLine("Error updating " + typesRegistryPackageName + " package: " + e.message);
                        }
                        _this.delayedInitializationError = {
                            kind: "event::initializationFailed",
                            message: e.message
                        };
                    }
                    _this.typesRegistry = loadTypesRegistryFile(getTypesRegistryFileLocation(globalTypingsCacheLocation), _this.installTypingHost, _this.log);
                    return _this;
                }
                NodeTypingsInstaller.prototype.listen = function () {
                    var _this = this;
                    process.on("message", function (req) {
                        if (_this.delayedInitializationError) {
                            _this.sendResponse(_this.delayedInitializationError);
                            _this.delayedInitializationError = undefined;
                        }
                        switch (req.kind) {
                            case "discover":
                                _this.install(req);
                                break;
                            case "closeProject":
                                _this.closeProject(req);
                                break;
                            case "typesRegistry": {
                                var typesRegistry_1 = {};
                                _this.typesRegistry.forEach(function (value, key) {
                                    typesRegistry_1[key] = value;
                                });
                                var response = { kind: server.EventTypesRegistry, typesRegistry: typesRegistry_1 };
                                _this.sendResponse(response);
                                break;
                            }
                            case "installPackage": {
                                var fileName = req.fileName, packageName_1 = req.packageName, projectName_1 = req.projectName, projectRootPath = req.projectRootPath;
                                var cwd = getDirectoryOfPackageJson(fileName, _this.installTypingHost) || projectRootPath;
                                if (cwd) {
                                    _this.installWorker(-1, [packageName_1], cwd, function (success) {
                                        var message = success ? "Package " + packageName_1 + " installed." : "There was an error installing " + packageName_1 + ".";
                                        var response = { kind: server.ActionPackageInstalled, projectName: projectName_1, success: success, message: message };
                                        _this.sendResponse(response);
                                    });
                                }
                                else {
                                    var response = { kind: server.ActionPackageInstalled, projectName: projectName_1, success: false, message: "Could not determine a project root path." };
                                    _this.sendResponse(response);
                                }
                                break;
                            }
                            default:
                                ts.Debug.assertNever(req);
                        }
                    });
                };
                NodeTypingsInstaller.prototype.sendResponse = function (response) {
                    if (this.log.isEnabled()) {
                        this.log.writeLine("Sending response:\n    " + JSON.stringify(response));
                    }
                    process.send(response);
                    if (this.log.isEnabled()) {
                        this.log.writeLine("Response has been sent.");
                    }
                };
                NodeTypingsInstaller.prototype.installWorker = function (requestId, packageNames, cwd, onRequestCompleted) {
                    var _this = this;
                    if (this.log.isEnabled()) {
                        this.log.writeLine("#" + requestId + " with arguments'" + JSON.stringify(packageNames) + "'.");
                    }
                    var start = Date.now();
                    var hasError = typingsInstaller.installNpmPackages(this.npmPath, ts.version, packageNames, function (command) { return _this.execSyncAndLog(command, { cwd: cwd }); });
                    if (this.log.isEnabled()) {
                        this.log.writeLine("npm install #" + requestId + " took: " + (Date.now() - start) + " ms");
                    }
                    onRequestCompleted(!hasError);
                };
                NodeTypingsInstaller.prototype.execSyncAndLog = function (command, options) {
                    if (this.log.isEnabled()) {
                        this.log.writeLine("Exec: " + command);
                    }
                    try {
                        var stdout = this.nodeExecSync(command, __assign({}, options, { encoding: "utf-8" }));
                        if (this.log.isEnabled()) {
                            this.log.writeLine("    Succeeded. stdout:" + indent(ts.sys.newLine, stdout));
                        }
                        return false;
                    }
                    catch (error) {
                        var stdout = error.stdout, stderr = error.stderr;
                        this.log.writeLine("    Failed. stdout:" + indent(ts.sys.newLine, stdout) + ts.sys.newLine + "    stderr:" + indent(ts.sys.newLine, stderr));
                        return true;
                    }
                };
                return NodeTypingsInstaller;
            }(typingsInstaller.TypingsInstaller));
            typingsInstaller.NodeTypingsInstaller = NodeTypingsInstaller;
            function getDirectoryOfPackageJson(fileName, host) {
                return ts.forEachAncestorDirectory(ts.getDirectoryPath(fileName), function (directory) {
                    if (host.fileExists(ts.combinePaths(directory, "package.json"))) {
                        return directory;
                    }
                });
            }
            var logFilePath = server.findArgument(server.Arguments.LogFile);
            var globalTypingsCacheLocation = server.findArgument(server.Arguments.GlobalCacheLocation);
            var typingSafeListLocation = server.findArgument(server.Arguments.TypingSafeListLocation);
            var typesMapLocation = server.findArgument(server.Arguments.TypesMapLocation);
            var npmLocation = server.findArgument(server.Arguments.NpmLocation);
            var log = new FileLog(logFilePath);
            if (log.isEnabled()) {
                process.on("uncaughtException", function (e) {
                    log.writeLine("Unhandled exception: " + e + " at " + e.stack);
                });
            }
            process.on("disconnect", function () {
                if (log.isEnabled()) {
                    log.writeLine("Parent process has exited, shutting down...");
                }
                process.exit(0);
            });
            var installer = new NodeTypingsInstaller(globalTypingsCacheLocation, typingSafeListLocation, typesMapLocation, npmLocation, 5, log);
            installer.listen();
            function indent(newline, str) {
                return newline + "    " + str.replace(/\r?\n/, newline + "    ");
            }
        })(typingsInstaller = server.typingsInstaller || (server.typingsInstaller = {}));
    })(server = ts.server || (ts.server = {}));
})(ts || (ts = {}));
//# sourceMappingURL=typingsInstaller.js.map