2938 lines
117 KiB
TypeScript
2938 lines
117 KiB
TypeScript
/// <reference path="checker.ts"/>
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/// <reference path="transformer.ts" />
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/// <reference path="declarationEmitter.ts"/>
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/// <reference path="sourcemap.ts"/>
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/// <reference path="comments.ts" />
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/* @internal */
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namespace ts {
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// Flags enum to track count of temp variables and a few dedicated names
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const enum TempFlags {
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Auto = 0x00000000, // No preferred name
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CountMask = 0x0FFFFFFF, // Temp variable counter
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_i = 0x10000000, // Use/preference flag for '_i'
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}
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// targetSourceFile is when users only want one file in entire project to be emitted. This is used in compileOnSave feature
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export function emitFiles(resolver: EmitResolver, host: EmitHost, targetSourceFile: SourceFile): EmitResult {
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const delimiters = createDelimiterMap();
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const brackets = createBracketsMap();
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// emit output for the __extends helper function
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const extendsHelper = `
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var __extends = (this && this.__extends) || function (d, b) {
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for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
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function __() { this.constructor = d; }
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d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
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};`;
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// Emit output for the __assign helper function.
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// This is typically used for JSX spread attributes,
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// and can be used for object literal spread properties.
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const assignHelper = `
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var __assign = (this && this.__assign) || Object.assign || function(t) {
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for (var s, i = 1, n = arguments.length; i < n; i++) {
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s = arguments[i];
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for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
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t[p] = s[p];
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}
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return t;
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};`;
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// emit output for the __decorate helper function
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const decorateHelper = `
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var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
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var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
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if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
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else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
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return c > 3 && r && Object.defineProperty(target, key, r), r;
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};`;
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// emit output for the __metadata helper function
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const metadataHelper = `
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var __metadata = (this && this.__metadata) || function (k, v) {
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if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(k, v);
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};`;
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// emit output for the __param helper function
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const paramHelper = `
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var __param = (this && this.__param) || function (paramIndex, decorator) {
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return function (target, key) { decorator(target, key, paramIndex); }
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};`;
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// emit output for the __awaiter helper function
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const awaiterHelper = `
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var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
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return new (P || (P = Promise))(function (resolve, reject) {
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function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
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function rejected(value) { try { step(generator.throw(value)); } catch (e) { reject(e); } }
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function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
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step((generator = generator.apply(thisArg, _arguments)).next());
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});
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};`;
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const generatorHelper = `
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var __generator = (this && this.__generator) || function (thisArg, body) {
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var _ = { label: 0, sent: function() { if (sent[0] === 1) throw sent[1]; return sent[1]; }, trys: [], stack: [] }, sent, f;
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function step(op) {
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if (f) throw new TypeError("Generator is already executing.");
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while (1) {
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if (_.done) switch (op[0]) {
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case 0: return { value: void 0, done: true };
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case 1: case 6: throw op[1];
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case 2: return { value: op[1], done: true };
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}
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try {
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switch (f = 1, op[0]) {
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case 0: case 1: sent = op; break;
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case 4: return _.label++, { value: op[1], done: false };
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case 7: op = _.stack.pop(), _.trys.pop(); continue;
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default:
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var r = _.trys.length > 0 && _.trys[_.trys.length - 1];
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if (!r && (op[0] === 6 || op[0] === 2)) { _.done = 1; continue; }
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if (op[0] === 3 && (!r || (op[1] > r[0] && op[1] < r[3]))) { _.label = op[1]; break; }
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if (op[0] === 6 && _.label < r[1]) { _.label = r[1], sent = op; break; }
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if (r && _.label < r[2]) { _.label = r[2], _.stack.push(op); break; }
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if (r[2]) { _.stack.pop(); }
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_.trys.pop();
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continue;
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}
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op = body.call(thisArg, _);
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}
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catch (e) { op = [6, e]; }
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finally { f = 0, sent = void 0; }
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}
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}
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return {
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next: function (v) { return step([0, v]); },
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"throw": function (v) { return step([1, v]); },
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"return": function (v) { return step([2, v]); }
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};
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};`;
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// emit output for the __export helper function
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const exportStarHelper = `
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function __export(m) {
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for (var p in m) if (!exports.hasOwnProperty(p)) exports[p] = m[p];
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}`;
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// emit output for the UMD helper function.
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const umdHelper = `
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(function (dependencies, factory) {
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if (typeof module === 'object' && typeof module.exports === 'object') {
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var v = factory(require, exports); if (v !== undefined) module.exports = v;
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}
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else if (typeof define === 'function' && define.amd) {
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define(dependencies, factory);
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}
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})`;
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const superHelper = `
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const _super = name => super[name];`;
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const advancedSuperHelper = `
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const _super = (function (geti, seti) {
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const cache = Object.create(null);
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return name => cache[name] || (cache[name] = { get value() { return geti(name); }, set value(v) { seti(name, v); } });
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})(name => super[name], (name, value) => super[name] = value);`;
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const compilerOptions = host.getCompilerOptions();
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const languageVersion = getEmitScriptTarget(compilerOptions);
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const moduleKind = getEmitModuleKind(compilerOptions);
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const sourceMapDataList: SourceMapData[] = compilerOptions.sourceMap || compilerOptions.inlineSourceMap ? [] : undefined;
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const emittedFilesList: string[] = compilerOptions.listEmittedFiles ? [] : undefined;
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const emitterDiagnostics = createDiagnosticCollection();
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const newLine = host.getNewLine();
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const transformers = getTransformers(compilerOptions);
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const writer = createTextWriter(newLine);
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const {
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write,
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writeLine,
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increaseIndent,
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decreaseIndent
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} = writer;
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const sourceMap = createSourceMapWriter(host, writer);
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const {
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emitStart,
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emitEnd,
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emitTokenStart,
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emitTokenEnd
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} = sourceMap;
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const comments = createCommentWriter(host, writer, sourceMap);
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const {
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emitNodeWithComments,
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emitBodyWithDetachedComments,
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emitTrailingCommentsOfPosition
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} = comments;
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let nodeIdToGeneratedName: string[];
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let autoGeneratedIdToGeneratedName: string[];
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let generatedNameSet: Map<string>;
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let tempFlags: TempFlags;
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let currentSourceFile: SourceFile;
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let currentText: string;
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let currentFileIdentifiers: Map<string>;
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let extendsEmitted: boolean;
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let assignEmitted: boolean;
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let decorateEmitted: boolean;
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let paramEmitted: boolean;
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let awaiterEmitted: boolean;
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let isOwnFileEmit: boolean;
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let emitSkipped = false;
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performance.mark("beforeTransform");
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// Transform the source files
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const transformed = transformFiles(
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resolver,
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host,
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getSourceFilesToEmit(host, targetSourceFile),
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transformers);
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performance.measure("transformTime", "beforeTransform");
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// Extract helpers from the result
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const {
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getTokenSourceMapRange,
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isSubstitutionEnabled,
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isEmitNotificationEnabled,
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onSubstituteNode,
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onEmitNode
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} = transformed;
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performance.mark("beforePrint");
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// Emit each output file
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forEachTransformedEmitFile(host, transformed.getSourceFiles(), emitFile);
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// Clean up after transformation
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transformed.dispose();
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performance.measure("printTime", "beforePrint");
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return {
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emitSkipped,
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diagnostics: emitterDiagnostics.getDiagnostics(),
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emittedFiles: emittedFilesList,
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sourceMaps: sourceMapDataList
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};
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function emitFile(jsFilePath: string, sourceMapFilePath: string, declarationFilePath: string, sourceFiles: SourceFile[], isBundledEmit: boolean) {
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// Make sure not to write js file and source map file if any of them cannot be written
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if (!host.isEmitBlocked(jsFilePath) && !compilerOptions.noEmit) {
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printFile(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit);
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}
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else {
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emitSkipped = true;
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}
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if (declarationFilePath) {
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emitSkipped = writeDeclarationFile(declarationFilePath, getOriginalSourceFiles(sourceFiles), isBundledEmit, host, resolver, emitterDiagnostics) || emitSkipped;
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}
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if (!emitSkipped && emittedFilesList) {
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emittedFilesList.push(jsFilePath);
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if (sourceMapFilePath) {
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emittedFilesList.push(sourceMapFilePath);
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}
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if (declarationFilePath) {
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emittedFilesList.push(declarationFilePath);
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}
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}
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}
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function printFile(jsFilePath: string, sourceMapFilePath: string, sourceFiles: SourceFile[], isBundledEmit: boolean) {
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sourceMap.initialize(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit);
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nodeIdToGeneratedName = [];
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autoGeneratedIdToGeneratedName = [];
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generatedNameSet = createMap<string>();
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isOwnFileEmit = !isBundledEmit;
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// Emit helpers from all the files
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if (isBundledEmit && moduleKind) {
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forEach(sourceFiles, emitEmitHelpers);
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}
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// Print each transformed source file.
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forEach(sourceFiles, printSourceFile);
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writeLine();
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const sourceMappingURL = sourceMap.getSourceMappingURL();
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if (sourceMappingURL) {
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write(`//# ${"sourceMappingURL"}=${sourceMappingURL}`); // Sometimes tools can sometimes see this line as a source mapping url comment
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}
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// Write the source map
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if (compilerOptions.sourceMap && !compilerOptions.inlineSourceMap) {
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writeFile(host, emitterDiagnostics, sourceMapFilePath, sourceMap.getText(), /*writeByteOrderMark*/ false);
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}
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// Record source map data for the test harness.
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if (sourceMapDataList) {
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sourceMapDataList.push(sourceMap.getSourceMapData());
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}
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// Write the output file
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writeFile(host, emitterDiagnostics, jsFilePath, writer.getText(), compilerOptions.emitBOM);
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// Reset state
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sourceMap.reset();
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comments.reset();
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writer.reset();
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tempFlags = TempFlags.Auto;
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currentSourceFile = undefined;
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currentText = undefined;
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extendsEmitted = false;
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assignEmitted = false;
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decorateEmitted = false;
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paramEmitted = false;
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awaiterEmitted = false;
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isOwnFileEmit = false;
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}
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function printSourceFile(node: SourceFile) {
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currentSourceFile = node;
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currentText = node.text;
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currentFileIdentifiers = node.identifiers;
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sourceMap.setSourceFile(node);
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comments.setSourceFile(node);
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emitNodeWithNotification(node, emitWorker);
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}
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/**
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* Emits a node.
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*/
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function emit(node: Node) {
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emitNodeWithNotification(node, emitWithComments);
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}
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/**
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* Emits a node with comments.
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*
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* NOTE: Do not call this method directly. It is part of the emit pipeline
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* and should only be called indirectly from emit.
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*/
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function emitWithComments(node: Node) {
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emitNodeWithComments(node, emitWithSourceMap);
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}
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/**
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* Emits a node with source maps.
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*
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* NOTE: Do not call this method directly. It is part of the emit pipeline
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* and should only be called indirectly from emitWithComments.
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*/
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function emitWithSourceMap(node: Node) {
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emitNodeWithSourceMap(node, emitWorker);
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}
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function emitIdentifierName(node: Identifier) {
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if (node) {
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emitNodeWithNotification(node, emitIdentifierNameWithComments);
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}
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}
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function emitIdentifierNameWithComments(node: Identifier) {
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emitNodeWithComments(node, emitWorker);
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}
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/**
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* Emits an expression node.
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*/
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function emitExpression(node: Expression) {
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emitNodeWithNotification(node, emitExpressionWithComments);
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}
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/**
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* Emits an expression with comments.
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*
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* NOTE: Do not call this method directly. It is part of the emitExpression pipeline
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* and should only be called indirectly from emitExpression.
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*/
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function emitExpressionWithComments(node: Expression) {
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emitNodeWithComments(node, emitExpressionWithSourceMap);
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}
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/**
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* Emits an expression with source maps.
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*
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* NOTE: Do not call this method directly. It is part of the emitExpression pipeline
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* and should only be called indirectly from emitExpressionWithComments.
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*/
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function emitExpressionWithSourceMap(node: Expression) {
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emitNodeWithSourceMap(node, emitExpressionWorker);
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}
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/**
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* Emits a node with emit notification if available.
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*/
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function emitNodeWithNotification(node: Node, emitCallback: (node: Node) => void) {
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if (node) {
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if (isEmitNotificationEnabled(node)) {
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onEmitNode(node, emitCallback);
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}
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else {
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emitCallback(node);
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}
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}
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}
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function emitNodeWithSourceMap(node: Node, emitCallback: (node: Node) => void) {
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if (node) {
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emitStart(/*range*/ node, /*contextNode*/ node, shouldSkipLeadingSourceMapForNode, shouldSkipSourceMapForChildren, getSourceMapRange);
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emitCallback(node);
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emitEnd(/*range*/ node, /*contextNode*/ node, shouldSkipTrailingSourceMapForNode, shouldSkipSourceMapForChildren, getSourceMapRange);
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}
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}
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function getSourceMapRange(node: Node) {
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return node.sourceMapRange || node;
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}
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|
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|
/**
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* Determines whether to skip leading comment emit for a node.
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*
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* We do not emit comments for NotEmittedStatement nodes or any node that has
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* NodeEmitFlags.NoLeadingComments.
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*
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* @param node A Node.
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*/
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function shouldSkipLeadingCommentsForNode(node: Node) {
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return isNotEmittedStatement(node)
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|| (node.emitFlags & NodeEmitFlags.NoLeadingComments) !== 0;
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}
|
|
|
|
/**
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|
* Determines whether to skip source map emit for the start position of a node.
|
|
*
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|
* We do not emit source maps for NotEmittedStatement nodes or any node that
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|
* has NodeEmitFlags.NoLeadingSourceMap.
|
|
*
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|
* @param node A Node.
|
|
*/
|
|
function shouldSkipLeadingSourceMapForNode(node: Node) {
|
|
return isNotEmittedStatement(node)
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|
|| (node.emitFlags & NodeEmitFlags.NoLeadingSourceMap) !== 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* Determines whether to skip source map emit for the end position of a node.
|
|
*
|
|
* We do not emit source maps for NotEmittedStatement nodes or any node that
|
|
* has NodeEmitFlags.NoTrailingSourceMap.
|
|
*
|
|
* @param node A Node.
|
|
*/
|
|
function shouldSkipTrailingSourceMapForNode(node: Node) {
|
|
return isNotEmittedStatement(node)
|
|
|| (node.emitFlags & NodeEmitFlags.NoTrailingSourceMap) !== 0;
|
|
}
|
|
|
|
/**
|
|
* Determines whether to skip source map emit for a node and its children.
|
|
*
|
|
* We do not emit source maps for a node that has NodeEmitFlags.NoNestedSourceMaps.
|
|
*/
|
|
function shouldSkipSourceMapForChildren(node: Node) {
|
|
return (node.emitFlags & NodeEmitFlags.NoNestedSourceMaps) !== 0;
|
|
}
|
|
|
|
function emitWorker(node: Node): void {
|
|
if (tryEmitSubstitute(node, emitWorker, /*isExpression*/ false)) {
|
|
return;
|
|
}
|
|
|
|
const kind = node.kind;
|
|
switch (kind) {
|
|
// Pseudo-literals
|
|
case SyntaxKind.TemplateHead:
|
|
case SyntaxKind.TemplateMiddle:
|
|
case SyntaxKind.TemplateTail:
|
|
return emitLiteral(<LiteralExpression>node);
|
|
|
|
// Identifiers
|
|
case SyntaxKind.Identifier:
|
|
return emitIdentifier(<Identifier>node);
|
|
|
|
// Reserved words
|
|
case SyntaxKind.ConstKeyword:
|
|
case SyntaxKind.DefaultKeyword:
|
|
case SyntaxKind.ExportKeyword:
|
|
case SyntaxKind.VoidKeyword:
|
|
|
|
// Strict mode reserved words
|
|
case SyntaxKind.PrivateKeyword:
|
|
case SyntaxKind.ProtectedKeyword:
|
|
case SyntaxKind.PublicKeyword:
|
|
case SyntaxKind.StaticKeyword:
|
|
|
|
// Contextual keywords
|
|
case SyntaxKind.AbstractKeyword:
|
|
case SyntaxKind.AnyKeyword:
|
|
case SyntaxKind.AsyncKeyword:
|
|
case SyntaxKind.BooleanKeyword:
|
|
case SyntaxKind.DeclareKeyword:
|
|
case SyntaxKind.NumberKeyword:
|
|
case SyntaxKind.ReadonlyKeyword:
|
|
case SyntaxKind.StringKeyword:
|
|
case SyntaxKind.SymbolKeyword:
|
|
case SyntaxKind.GlobalKeyword:
|
|
return writeTokenNode(node);
|
|
|
|
// Parse tree nodes
|
|
|
|
// Names
|
|
case SyntaxKind.QualifiedName:
|
|
return emitQualifiedName(<QualifiedName>node);
|
|
case SyntaxKind.ComputedPropertyName:
|
|
return emitComputedPropertyName(<ComputedPropertyName>node);
|
|
|
|
// Signature elements
|
|
case SyntaxKind.TypeParameter:
|
|
return emitTypeParameter(<TypeParameterDeclaration>node);
|
|
case SyntaxKind.Parameter:
|
|
return emitParameter(<ParameterDeclaration>node);
|
|
case SyntaxKind.Decorator:
|
|
return emitDecorator(<Decorator>node);
|
|
|
|
// Type members
|
|
case SyntaxKind.PropertySignature:
|
|
return emitPropertySignature(<PropertySignature>node);
|
|
case SyntaxKind.PropertyDeclaration:
|
|
return emitPropertyDeclaration(<PropertyDeclaration>node);
|
|
case SyntaxKind.MethodSignature:
|
|
return emitMethodSignature(<MethodSignature>node);
|
|
case SyntaxKind.MethodDeclaration:
|
|
return emitMethodDeclaration(<MethodDeclaration>node);
|
|
case SyntaxKind.Constructor:
|
|
return emitConstructor(<ConstructorDeclaration>node);
|
|
case SyntaxKind.GetAccessor:
|
|
case SyntaxKind.SetAccessor:
|
|
return emitAccessorDeclaration(<AccessorDeclaration>node);
|
|
case SyntaxKind.CallSignature:
|
|
return emitCallSignature(<CallSignatureDeclaration>node);
|
|
case SyntaxKind.ConstructSignature:
|
|
return emitConstructSignature(<ConstructSignatureDeclaration>node);
|
|
case SyntaxKind.IndexSignature:
|
|
return emitIndexSignature(<IndexSignatureDeclaration>node);
|
|
|
|
// Types
|
|
case SyntaxKind.TypePredicate:
|
|
return emitTypePredicate(<TypePredicateNode>node);
|
|
case SyntaxKind.TypeReference:
|
|
return emitTypeReference(<TypeReferenceNode>node);
|
|
case SyntaxKind.FunctionType:
|
|
return emitFunctionType(<FunctionTypeNode>node);
|
|
case SyntaxKind.ConstructorType:
|
|
return emitConstructorType(<ConstructorTypeNode>node);
|
|
case SyntaxKind.TypeQuery:
|
|
return emitTypeQuery(<TypeQueryNode>node);
|
|
case SyntaxKind.TypeLiteral:
|
|
return emitTypeLiteral(<TypeLiteralNode>node);
|
|
case SyntaxKind.ArrayType:
|
|
return emitArrayType(<ArrayTypeNode>node);
|
|
case SyntaxKind.TupleType:
|
|
return emitTupleType(<TupleTypeNode>node);
|
|
case SyntaxKind.UnionType:
|
|
return emitUnionType(<UnionTypeNode>node);
|
|
case SyntaxKind.IntersectionType:
|
|
return emitIntersectionType(<IntersectionTypeNode>node);
|
|
case SyntaxKind.ParenthesizedType:
|
|
return emitParenthesizedType(<ParenthesizedTypeNode>node);
|
|
case SyntaxKind.ExpressionWithTypeArguments:
|
|
return emitExpressionWithTypeArguments(<ExpressionWithTypeArguments>node);
|
|
case SyntaxKind.ThisType:
|
|
return emitThisType(<ThisTypeNode>node);
|
|
case SyntaxKind.LiteralType:
|
|
return emitLiteralType(<LiteralTypeNode>node);
|
|
|
|
// Binding patterns
|
|
case SyntaxKind.ObjectBindingPattern:
|
|
return emitObjectBindingPattern(<BindingPattern>node);
|
|
case SyntaxKind.ArrayBindingPattern:
|
|
return emitArrayBindingPattern(<BindingPattern>node);
|
|
case SyntaxKind.BindingElement:
|
|
return emitBindingElement(<BindingElement>node);
|
|
|
|
// Misc
|
|
case SyntaxKind.TemplateSpan:
|
|
return emitTemplateSpan(<TemplateSpan>node);
|
|
case SyntaxKind.SemicolonClassElement:
|
|
return emitSemicolonClassElement(<SemicolonClassElement>node);
|
|
|
|
// Statements
|
|
case SyntaxKind.Block:
|
|
return emitBlock(<Block>node);
|
|
case SyntaxKind.VariableStatement:
|
|
return emitVariableStatement(<VariableStatement>node);
|
|
case SyntaxKind.EmptyStatement:
|
|
return emitEmptyStatement(<EmptyStatement>node);
|
|
case SyntaxKind.ExpressionStatement:
|
|
return emitExpressionStatement(<ExpressionStatement>node);
|
|
case SyntaxKind.IfStatement:
|
|
return emitIfStatement(<IfStatement>node);
|
|
case SyntaxKind.DoStatement:
|
|
return emitDoStatement(<DoStatement>node);
|
|
case SyntaxKind.WhileStatement:
|
|
return emitWhileStatement(<WhileStatement>node);
|
|
case SyntaxKind.ForStatement:
|
|
return emitForStatement(<ForStatement>node);
|
|
case SyntaxKind.ForInStatement:
|
|
return emitForInStatement(<ForInStatement>node);
|
|
case SyntaxKind.ForOfStatement:
|
|
return emitForOfStatement(<ForOfStatement>node);
|
|
case SyntaxKind.ContinueStatement:
|
|
return emitContinueStatement(<ContinueStatement>node);
|
|
case SyntaxKind.BreakStatement:
|
|
return emitBreakStatement(<BreakStatement>node);
|
|
case SyntaxKind.ReturnStatement:
|
|
return emitReturnStatement(<ReturnStatement>node);
|
|
case SyntaxKind.WithStatement:
|
|
return emitWithStatement(<WithStatement>node);
|
|
case SyntaxKind.SwitchStatement:
|
|
return emitSwitchStatement(<SwitchStatement>node);
|
|
case SyntaxKind.LabeledStatement:
|
|
return emitLabeledStatement(<LabeledStatement>node);
|
|
case SyntaxKind.ThrowStatement:
|
|
return emitThrowStatement(<ThrowStatement>node);
|
|
case SyntaxKind.TryStatement:
|
|
return emitTryStatement(<TryStatement>node);
|
|
case SyntaxKind.DebuggerStatement:
|
|
return emitDebuggerStatement(<DebuggerStatement>node);
|
|
|
|
// Declarations
|
|
case SyntaxKind.VariableDeclaration:
|
|
return emitVariableDeclaration(<VariableDeclaration>node);
|
|
case SyntaxKind.VariableDeclarationList:
|
|
return emitVariableDeclarationList(<VariableDeclarationList>node);
|
|
case SyntaxKind.FunctionDeclaration:
|
|
return emitFunctionDeclaration(<FunctionDeclaration>node);
|
|
case SyntaxKind.ClassDeclaration:
|
|
return emitClassDeclaration(<ClassDeclaration>node);
|
|
case SyntaxKind.InterfaceDeclaration:
|
|
return emitInterfaceDeclaration(<InterfaceDeclaration>node);
|
|
case SyntaxKind.TypeAliasDeclaration:
|
|
return emitTypeAliasDeclaration(<TypeAliasDeclaration>node);
|
|
case SyntaxKind.EnumDeclaration:
|
|
return emitEnumDeclaration(<EnumDeclaration>node);
|
|
case SyntaxKind.ModuleDeclaration:
|
|
return emitModuleDeclaration(<ModuleDeclaration>node);
|
|
case SyntaxKind.ModuleBlock:
|
|
return emitModuleBlock(<Block>node);
|
|
case SyntaxKind.CaseBlock:
|
|
return emitCaseBlock(<CaseBlock>node);
|
|
case SyntaxKind.ImportEqualsDeclaration:
|
|
return emitImportEqualsDeclaration(<ImportEqualsDeclaration>node);
|
|
case SyntaxKind.ImportDeclaration:
|
|
return emitImportDeclaration(<ImportDeclaration>node);
|
|
case SyntaxKind.ImportClause:
|
|
return emitImportClause(<ImportClause>node);
|
|
case SyntaxKind.NamespaceImport:
|
|
return emitNamespaceImport(<NamespaceImport>node);
|
|
case SyntaxKind.NamedImports:
|
|
return emitNamedImports(<NamedImports>node);
|
|
case SyntaxKind.ImportSpecifier:
|
|
return emitImportSpecifier(<ImportSpecifier>node);
|
|
case SyntaxKind.ExportAssignment:
|
|
return emitExportAssignment(<ExportAssignment>node);
|
|
case SyntaxKind.ExportDeclaration:
|
|
return emitExportDeclaration(<ExportDeclaration>node);
|
|
case SyntaxKind.NamedExports:
|
|
return emitNamedExports(<NamedExports>node);
|
|
case SyntaxKind.ExportSpecifier:
|
|
return emitExportSpecifier(<ExportSpecifier>node);
|
|
case SyntaxKind.MissingDeclaration:
|
|
return;
|
|
|
|
// Module references
|
|
case SyntaxKind.ExternalModuleReference:
|
|
return emitExternalModuleReference(<ExternalModuleReference>node);
|
|
|
|
// JSX (non-expression)
|
|
case SyntaxKind.JsxText:
|
|
return emitJsxText(<JsxText>node);
|
|
case SyntaxKind.JsxOpeningElement:
|
|
return emitJsxOpeningElement(<JsxOpeningElement>node);
|
|
case SyntaxKind.JsxClosingElement:
|
|
return emitJsxClosingElement(<JsxClosingElement>node);
|
|
case SyntaxKind.JsxAttribute:
|
|
return emitJsxAttribute(<JsxAttribute>node);
|
|
case SyntaxKind.JsxSpreadAttribute:
|
|
return emitJsxSpreadAttribute(<JsxSpreadAttribute>node);
|
|
case SyntaxKind.JsxExpression:
|
|
return emitJsxExpression(<JsxExpression>node);
|
|
|
|
// Clauses
|
|
case SyntaxKind.CaseClause:
|
|
return emitCaseClause(<CaseClause>node);
|
|
case SyntaxKind.DefaultClause:
|
|
return emitDefaultClause(<DefaultClause>node);
|
|
case SyntaxKind.HeritageClause:
|
|
return emitHeritageClause(<HeritageClause>node);
|
|
case SyntaxKind.CatchClause:
|
|
return emitCatchClause(<CatchClause>node);
|
|
|
|
// Property assignments
|
|
case SyntaxKind.PropertyAssignment:
|
|
return emitPropertyAssignment(<PropertyAssignment>node);
|
|
case SyntaxKind.ShorthandPropertyAssignment:
|
|
return emitShorthandPropertyAssignment(<ShorthandPropertyAssignment>node);
|
|
|
|
// Enum
|
|
case SyntaxKind.EnumMember:
|
|
return emitEnumMember(<EnumMember>node);
|
|
|
|
// Top-level nodes
|
|
case SyntaxKind.SourceFile:
|
|
return emitSourceFile(<SourceFile>node);
|
|
|
|
// JSDoc nodes (ignored)
|
|
|
|
// Transformation nodes (ignored)
|
|
}
|
|
|
|
if (isExpression(node)) {
|
|
return emitExpressionWorker(node);
|
|
}
|
|
}
|
|
|
|
function emitExpressionWorker(node: Node) {
|
|
if (tryEmitSubstitute(node, emitExpressionWorker, /*isExpression*/ true)) {
|
|
return;
|
|
}
|
|
|
|
const kind = node.kind;
|
|
switch (kind) {
|
|
// Literals
|
|
case SyntaxKind.NumericLiteral:
|
|
return emitNumericLiteral(<NumericLiteral>node);
|
|
|
|
case SyntaxKind.StringLiteral:
|
|
case SyntaxKind.RegularExpressionLiteral:
|
|
case SyntaxKind.NoSubstitutionTemplateLiteral:
|
|
return emitLiteral(<LiteralExpression>node);
|
|
|
|
// Identifiers
|
|
case SyntaxKind.Identifier:
|
|
return emitIdentifier(<Identifier>node);
|
|
|
|
// Reserved words
|
|
case SyntaxKind.FalseKeyword:
|
|
case SyntaxKind.NullKeyword:
|
|
case SyntaxKind.SuperKeyword:
|
|
case SyntaxKind.TrueKeyword:
|
|
case SyntaxKind.ThisKeyword:
|
|
return writeTokenNode(node);
|
|
|
|
// Expressions
|
|
case SyntaxKind.ArrayLiteralExpression:
|
|
return emitArrayLiteralExpression(<ArrayLiteralExpression>node);
|
|
case SyntaxKind.ObjectLiteralExpression:
|
|
return emitObjectLiteralExpression(<ObjectLiteralExpression>node);
|
|
case SyntaxKind.PropertyAccessExpression:
|
|
return emitPropertyAccessExpression(<PropertyAccessExpression>node);
|
|
case SyntaxKind.ElementAccessExpression:
|
|
return emitElementAccessExpression(<ElementAccessExpression>node);
|
|
case SyntaxKind.CallExpression:
|
|
return emitCallExpression(<CallExpression>node);
|
|
case SyntaxKind.NewExpression:
|
|
return emitNewExpression(<NewExpression>node);
|
|
case SyntaxKind.TaggedTemplateExpression:
|
|
return emitTaggedTemplateExpression(<TaggedTemplateExpression>node);
|
|
case SyntaxKind.TypeAssertionExpression:
|
|
return emitTypeAssertionExpression(<TypeAssertion>node);
|
|
case SyntaxKind.ParenthesizedExpression:
|
|
return emitParenthesizedExpression(<ParenthesizedExpression>node);
|
|
case SyntaxKind.FunctionExpression:
|
|
return emitFunctionExpression(<FunctionExpression>node);
|
|
case SyntaxKind.ArrowFunction:
|
|
return emitArrowFunction(<ArrowFunction>node);
|
|
case SyntaxKind.DeleteExpression:
|
|
return emitDeleteExpression(<DeleteExpression>node);
|
|
case SyntaxKind.TypeOfExpression:
|
|
return emitTypeOfExpression(<TypeOfExpression>node);
|
|
case SyntaxKind.VoidExpression:
|
|
return emitVoidExpression(<VoidExpression>node);
|
|
case SyntaxKind.AwaitExpression:
|
|
return emitAwaitExpression(<AwaitExpression>node);
|
|
case SyntaxKind.PrefixUnaryExpression:
|
|
return emitPrefixUnaryExpression(<PrefixUnaryExpression>node);
|
|
case SyntaxKind.PostfixUnaryExpression:
|
|
return emitPostfixUnaryExpression(<PostfixUnaryExpression>node);
|
|
case SyntaxKind.BinaryExpression:
|
|
return emitBinaryExpression(<BinaryExpression>node);
|
|
case SyntaxKind.ConditionalExpression:
|
|
return emitConditionalExpression(<ConditionalExpression>node);
|
|
case SyntaxKind.TemplateExpression:
|
|
return emitTemplateExpression(<TemplateExpression>node);
|
|
case SyntaxKind.YieldExpression:
|
|
return emitYieldExpression(<YieldExpression>node);
|
|
case SyntaxKind.SpreadElementExpression:
|
|
return emitSpreadElementExpression(<SpreadElementExpression>node);
|
|
case SyntaxKind.ClassExpression:
|
|
return emitClassExpression(<ClassExpression>node);
|
|
case SyntaxKind.OmittedExpression:
|
|
return;
|
|
case SyntaxKind.AsExpression:
|
|
return emitAsExpression(<AsExpression>node);
|
|
case SyntaxKind.NonNullExpression:
|
|
return emitNonNullExpression(<NonNullExpression>node);
|
|
|
|
// JSX
|
|
case SyntaxKind.JsxElement:
|
|
return emitJsxElement(<JsxElement>node);
|
|
case SyntaxKind.JsxSelfClosingElement:
|
|
return emitJsxSelfClosingElement(<JsxSelfClosingElement>node);
|
|
|
|
// Transformation nodes
|
|
case SyntaxKind.PartiallyEmittedExpression:
|
|
return emitPartiallyEmittedExpression(<PartiallyEmittedExpression>node);
|
|
}
|
|
}
|
|
|
|
//
|
|
// Literals/Pseudo-literals
|
|
//
|
|
|
|
// SyntaxKind.NumericLiteral
|
|
function emitNumericLiteral(node: NumericLiteral) {
|
|
emitLiteral(node);
|
|
if (node.trailingComment) {
|
|
write(` /*${node.trailingComment}*/`);
|
|
}
|
|
}
|
|
|
|
// SyntaxKind.StringLiteral
|
|
// SyntaxKind.RegularExpressionLiteral
|
|
// SyntaxKind.NoSubstitutionTemplateLiteral
|
|
// SyntaxKind.TemplateHead
|
|
// SyntaxKind.TemplateMiddle
|
|
// SyntaxKind.TemplateTail
|
|
function emitLiteral(node: LiteralLikeNode) {
|
|
const text = getLiteralTextOfNode(node);
|
|
if ((compilerOptions.sourceMap || compilerOptions.inlineSourceMap)
|
|
&& (node.kind === SyntaxKind.StringLiteral || isTemplateLiteralKind(node.kind))) {
|
|
writer.writeLiteral(text);
|
|
}
|
|
else {
|
|
write(text);
|
|
}
|
|
}
|
|
|
|
//
|
|
// Identifiers
|
|
//
|
|
|
|
function emitIdentifier(node: Identifier) {
|
|
if (node.emitFlags & NodeEmitFlags.UMDDefine) {
|
|
writeLines(umdHelper);
|
|
}
|
|
else {
|
|
write(getTextOfNode(node, /*includeTrivia*/ false));
|
|
}
|
|
}
|
|
|
|
//
|
|
// Names
|
|
//
|
|
|
|
function emitQualifiedName(node: QualifiedName) {
|
|
emitEntityName(node.left);
|
|
write(".");
|
|
emit(node.right);
|
|
}
|
|
|
|
function emitEntityName(node: EntityName) {
|
|
if (node.kind === SyntaxKind.Identifier) {
|
|
emitExpression(<Identifier>node);
|
|
}
|
|
else {
|
|
emit(node);
|
|
}
|
|
}
|
|
|
|
function emitComputedPropertyName(node: ComputedPropertyName) {
|
|
write("[");
|
|
emitExpression(node.expression);
|
|
write("]");
|
|
}
|
|
|
|
//
|
|
// Signature elements
|
|
//
|
|
|
|
function emitTypeParameter(node: TypeParameterDeclaration) {
|
|
emit(node.name);
|
|
emitWithPrefix(" extends ", node.constraint);
|
|
}
|
|
|
|
function emitParameter(node: ParameterDeclaration) {
|
|
emitDecorators(node, node.decorators);
|
|
emitModifiers(node, node.modifiers);
|
|
writeIfPresent(node.dotDotDotToken, "...");
|
|
emit(node.name);
|
|
writeIfPresent(node.questionToken, "?");
|
|
emitExpressionWithPrefix(" = ", node.initializer);
|
|
emitWithPrefix(": ", node.type);
|
|
}
|
|
|
|
function emitDecorator(decorator: Decorator) {
|
|
write("@");
|
|
emitExpression(decorator.expression);
|
|
}
|
|
|
|
//
|
|
// Type members
|
|
//
|
|
|
|
function emitPropertySignature(node: PropertySignature) {
|
|
emitDecorators(node, node.decorators);
|
|
emitModifiers(node, node.modifiers);
|
|
emit(node.name);
|
|
writeIfPresent(node.questionToken, "?");
|
|
emitWithPrefix(": ", node.type);
|
|
write(";");
|
|
}
|
|
|
|
function emitPropertyDeclaration(node: PropertyDeclaration) {
|
|
emitDecorators(node, node.decorators);
|
|
emitModifiers(node, node.modifiers);
|
|
emit(node.name);
|
|
emitWithPrefix(": ", node.type);
|
|
emitExpressionWithPrefix(" = ", node.initializer);
|
|
write(";");
|
|
}
|
|
|
|
function emitMethodSignature(node: MethodSignature) {
|
|
emitDecorators(node, node.decorators);
|
|
emitModifiers(node, node.modifiers);
|
|
emit(node.name);
|
|
writeIfPresent(node.questionToken, "?");
|
|
emitTypeParameters(node, node.typeParameters);
|
|
emitParameters(node, node.parameters);
|
|
emitWithPrefix(": ", node.type);
|
|
write(";");
|
|
}
|
|
|
|
function emitMethodDeclaration(node: MethodDeclaration) {
|
|
emitDecorators(node, node.decorators);
|
|
emitModifiers(node, node.modifiers);
|
|
writeIfPresent(node.asteriskToken, "*");
|
|
emit(node.name);
|
|
emitSignatureAndBody(node, emitSignatureHead);
|
|
}
|
|
|
|
function emitConstructor(node: ConstructorDeclaration) {
|
|
emitModifiers(node, node.modifiers);
|
|
write("constructor");
|
|
emitSignatureAndBody(node, emitSignatureHead);
|
|
}
|
|
|
|
function emitAccessorDeclaration(node: AccessorDeclaration) {
|
|
emitDecorators(node, node.decorators);
|
|
emitModifiers(node, node.modifiers);
|
|
write(node.kind === SyntaxKind.GetAccessor ? "get " : "set ");
|
|
emit(node.name);
|
|
emitSignatureAndBody(node, emitSignatureHead);
|
|
}
|
|
|
|
function emitCallSignature(node: CallSignatureDeclaration) {
|
|
emitDecorators(node, node.decorators);
|
|
emitModifiers(node, node.modifiers);
|
|
emitTypeParameters(node, node.typeParameters);
|
|
emitParameters(node, node.parameters);
|
|
emitWithPrefix(": ", node.type);
|
|
write(";");
|
|
}
|
|
|
|
function emitConstructSignature(node: ConstructSignatureDeclaration) {
|
|
emitDecorators(node, node.decorators);
|
|
emitModifiers(node, node.modifiers);
|
|
write("new ");
|
|
emitTypeParameters(node, node.typeParameters);
|
|
emitParameters(node, node.parameters);
|
|
emitWithPrefix(": ", node.type);
|
|
write(";");
|
|
}
|
|
|
|
function emitIndexSignature(node: IndexSignatureDeclaration) {
|
|
emitDecorators(node, node.decorators);
|
|
emitModifiers(node, node.modifiers);
|
|
emitParametersForIndexSignature(node, node.parameters);
|
|
emitWithPrefix(": ", node.type);
|
|
write(";");
|
|
}
|
|
|
|
function emitSemicolonClassElement(node: SemicolonClassElement) {
|
|
write(";");
|
|
}
|
|
|
|
//
|
|
// Types
|
|
//
|
|
|
|
function emitTypePredicate(node: TypePredicateNode) {
|
|
emit(node.parameterName);
|
|
write(" is ");
|
|
emit(node.type);
|
|
}
|
|
|
|
function emitTypeReference(node: TypeReferenceNode) {
|
|
emit(node.typeName);
|
|
emitTypeArguments(node, node.typeArguments);
|
|
}
|
|
|
|
function emitFunctionType(node: FunctionTypeNode) {
|
|
emitTypeParameters(node, node.typeParameters);
|
|
emitParametersForArrow(node, node.parameters);
|
|
write(" => ");
|
|
emit(node.type);
|
|
}
|
|
|
|
function emitConstructorType(node: ConstructorTypeNode) {
|
|
write("new ");
|
|
emitTypeParameters(node, node.typeParameters);
|
|
emitParametersForArrow(node, node.parameters);
|
|
write(" => ");
|
|
emit(node.type);
|
|
}
|
|
|
|
function emitTypeQuery(node: TypeQueryNode) {
|
|
write("typeof ");
|
|
emit(node.exprName);
|
|
}
|
|
|
|
function emitTypeLiteral(node: TypeLiteralNode) {
|
|
write("{");
|
|
emitList(node, node.members, ListFormat.TypeLiteralMembers);
|
|
write("}");
|
|
}
|
|
|
|
function emitArrayType(node: ArrayTypeNode) {
|
|
emit(node.elementType);
|
|
write("[]");
|
|
}
|
|
|
|
function emitTupleType(node: TupleTypeNode) {
|
|
write("[");
|
|
emitList(node, node.elementTypes, ListFormat.TupleTypeElements);
|
|
write("]");
|
|
}
|
|
|
|
function emitUnionType(node: UnionTypeNode) {
|
|
emitList(node, node.types, ListFormat.UnionTypeConstituents);
|
|
}
|
|
|
|
function emitIntersectionType(node: IntersectionTypeNode) {
|
|
emitList(node, node.types, ListFormat.IntersectionTypeConstituents);
|
|
}
|
|
|
|
function emitParenthesizedType(node: ParenthesizedTypeNode) {
|
|
write("(");
|
|
emit(node.type);
|
|
write(")");
|
|
}
|
|
|
|
function emitThisType(node: ThisTypeNode) {
|
|
write("this");
|
|
}
|
|
|
|
function emitLiteralType(node: LiteralTypeNode) {
|
|
emitExpression(node.literal);
|
|
}
|
|
|
|
//
|
|
// Binding patterns
|
|
//
|
|
|
|
function emitObjectBindingPattern(node: ObjectBindingPattern) {
|
|
const elements = node.elements;
|
|
if (elements.length === 0) {
|
|
write("{}");
|
|
}
|
|
else {
|
|
write("{");
|
|
emitList(node, elements, ListFormat.ObjectBindingPatternElements);
|
|
write("}");
|
|
}
|
|
}
|
|
|
|
function emitArrayBindingPattern(node: ArrayBindingPattern) {
|
|
const elements = node.elements;
|
|
if (elements.length === 0) {
|
|
write("[]");
|
|
}
|
|
else {
|
|
write("[");
|
|
emitList(node, node.elements, ListFormat.ArrayBindingPatternElements);
|
|
write("]");
|
|
}
|
|
}
|
|
|
|
function emitBindingElement(node: BindingElement) {
|
|
emitWithSuffix(node.propertyName, ": ");
|
|
writeIfPresent(node.dotDotDotToken, "...");
|
|
emit(node.name);
|
|
emitExpressionWithPrefix(" = ", node.initializer);
|
|
}
|
|
|
|
//
|
|
// Expressions
|
|
//
|
|
|
|
function emitArrayLiteralExpression(node: ArrayLiteralExpression) {
|
|
const elements = node.elements;
|
|
if (elements.length === 0) {
|
|
write("[]");
|
|
}
|
|
else {
|
|
const preferNewLine = node.multiLine ? ListFormat.PreferNewLine : ListFormat.None;
|
|
emitExpressionList(node, elements, ListFormat.ArrayLiteralExpressionElements | preferNewLine);
|
|
}
|
|
}
|
|
|
|
function emitObjectLiteralExpression(node: ObjectLiteralExpression) {
|
|
const properties = node.properties;
|
|
if (properties.length === 0) {
|
|
write("{}");
|
|
}
|
|
else {
|
|
const indentedFlag = node.emitFlags & NodeEmitFlags.Indented;
|
|
if (indentedFlag) {
|
|
increaseIndent();
|
|
}
|
|
|
|
const preferNewLine = node.multiLine ? ListFormat.PreferNewLine : ListFormat.None;
|
|
const allowTrailingComma = languageVersion >= ScriptTarget.ES5 ? ListFormat.AllowTrailingComma : ListFormat.None;
|
|
emitList(node, properties, ListFormat.ObjectLiteralExpressionProperties | allowTrailingComma | preferNewLine);
|
|
|
|
if (indentedFlag) {
|
|
decreaseIndent();
|
|
}
|
|
}
|
|
}
|
|
|
|
function emitPropertyAccessExpression(node: PropertyAccessExpression) {
|
|
if (tryEmitConstantValue(node)) {
|
|
return;
|
|
}
|
|
|
|
let indentBeforeDot = false;
|
|
let indentAfterDot = false;
|
|
if (!(node.emitFlags & NodeEmitFlags.NoIndentation)) {
|
|
const dotRangeStart = node.expression.end;
|
|
const dotRangeEnd = skipTrivia(currentText, node.expression.end) + 1;
|
|
const dotToken = <Node>{ kind: SyntaxKind.DotToken, pos: dotRangeStart, end: dotRangeEnd };
|
|
indentBeforeDot = needsIndentation(node, node.expression, dotToken);
|
|
indentAfterDot = needsIndentation(node, dotToken, node.name);
|
|
}
|
|
const shouldEmitDotDot = !indentBeforeDot && needsDotDotForPropertyAccess(node.expression);
|
|
|
|
emitExpression(node.expression);
|
|
increaseIndentIf(indentBeforeDot);
|
|
write(shouldEmitDotDot ? ".." : ".");
|
|
increaseIndentIf(indentAfterDot);
|
|
emit(node.name);
|
|
decreaseIndentIf(indentBeforeDot, indentAfterDot);
|
|
}
|
|
|
|
// 1..toString is a valid property access, emit a dot after the literal
|
|
// Also emit a dot if expression is a integer const enum value - it will appear in generated code as numeric literal
|
|
function needsDotDotForPropertyAccess(expression: Expression) {
|
|
if (expression.kind === SyntaxKind.NumericLiteral) {
|
|
// check if numeric literal was originally written with a dot
|
|
const text = getLiteralTextOfNode(<LiteralExpression>expression);
|
|
return text.indexOf(tokenToString(SyntaxKind.DotToken)) < 0;
|
|
}
|
|
else {
|
|
// check if constant enum value is integer
|
|
const constantValue = tryGetConstEnumValue(expression);
|
|
// isFinite handles cases when constantValue is undefined
|
|
return isFinite(constantValue) && Math.floor(constantValue) === constantValue;
|
|
}
|
|
}
|
|
|
|
function emitElementAccessExpression(node: ElementAccessExpression) {
|
|
if (tryEmitConstantValue(node)) {
|
|
return;
|
|
}
|
|
|
|
emitExpression(node.expression);
|
|
write("[");
|
|
emitExpression(node.argumentExpression);
|
|
write("]");
|
|
}
|
|
|
|
function emitCallExpression(node: CallExpression) {
|
|
emitExpression(node.expression);
|
|
emitExpressionList(node, node.arguments, ListFormat.CallExpressionArguments);
|
|
}
|
|
|
|
function emitNewExpression(node: NewExpression) {
|
|
write("new ");
|
|
emitExpression(node.expression);
|
|
emitExpressionList(node, node.arguments, ListFormat.NewExpressionArguments);
|
|
}
|
|
|
|
function emitTaggedTemplateExpression(node: TaggedTemplateExpression) {
|
|
emitExpression(node.tag);
|
|
write(" ");
|
|
emitExpression(node.template);
|
|
}
|
|
|
|
function emitTypeAssertionExpression(node: TypeAssertion) {
|
|
if (node.type) {
|
|
write("<");
|
|
emit(node.type);
|
|
write(">");
|
|
}
|
|
|
|
emitExpression(node.expression);
|
|
}
|
|
|
|
function emitParenthesizedExpression(node: ParenthesizedExpression) {
|
|
write("(");
|
|
emitExpression(node.expression);
|
|
write(")");
|
|
}
|
|
|
|
function emitFunctionExpression(node: FunctionExpression) {
|
|
emitFunctionDeclarationOrExpression(node);
|
|
}
|
|
|
|
function emitArrowFunction(node: ArrowFunction) {
|
|
emitDecorators(node, node.decorators);
|
|
emitModifiers(node, node.modifiers);
|
|
emitSignatureAndBody(node, emitArrowFunctionHead);
|
|
}
|
|
|
|
function emitArrowFunctionHead(node: ArrowFunction) {
|
|
emitTypeParameters(node, node.typeParameters);
|
|
emitParametersForArrow(node, node.parameters);
|
|
emitWithPrefix(": ", node.type);
|
|
write(" =>");
|
|
}
|
|
|
|
function emitDeleteExpression(node: DeleteExpression) {
|
|
write("delete ");
|
|
emitExpression(node.expression);
|
|
}
|
|
|
|
function emitTypeOfExpression(node: TypeOfExpression) {
|
|
write("typeof ");
|
|
emitExpression(node.expression);
|
|
}
|
|
|
|
function emitVoidExpression(node: VoidExpression) {
|
|
write("void ");
|
|
emitExpression(node.expression);
|
|
}
|
|
|
|
function emitAwaitExpression(node: AwaitExpression) {
|
|
write("await ");
|
|
emitExpression(node.expression);
|
|
}
|
|
|
|
function emitPrefixUnaryExpression(node: PrefixUnaryExpression) {
|
|
writeTokenText(node.operator);
|
|
if (shouldEmitWhitespaceBeforeOperand(node)) {
|
|
write(" ");
|
|
}
|
|
emitExpression(node.operand);
|
|
}
|
|
|
|
function shouldEmitWhitespaceBeforeOperand(node: PrefixUnaryExpression) {
|
|
// In some cases, we need to emit a space between the operator and the operand. One obvious case
|
|
// is when the operator is an identifier, like delete or typeof. We also need to do this for plus
|
|
// and minus expressions in certain cases. Specifically, consider the following two cases (parens
|
|
// are just for clarity of exposition, and not part of the source code):
|
|
//
|
|
// (+(+1))
|
|
// (+(++1))
|
|
//
|
|
// We need to emit a space in both cases. In the first case, the absence of a space will make
|
|
// the resulting expression a prefix increment operation. And in the second, it will make the resulting
|
|
// expression a prefix increment whose operand is a plus expression - (++(+x))
|
|
// The same is true of minus of course.
|
|
const operand = node.operand;
|
|
return operand.kind === SyntaxKind.PrefixUnaryExpression
|
|
&& ((node.operator === SyntaxKind.PlusToken && ((<PrefixUnaryExpression>operand).operator === SyntaxKind.PlusToken || (<PrefixUnaryExpression>operand).operator === SyntaxKind.PlusPlusToken))
|
|
|| (node.operator === SyntaxKind.MinusToken && ((<PrefixUnaryExpression>operand).operator === SyntaxKind.MinusToken || (<PrefixUnaryExpression>operand).operator === SyntaxKind.MinusMinusToken)));
|
|
}
|
|
|
|
function emitPostfixUnaryExpression(node: PostfixUnaryExpression) {
|
|
emitExpression(node.operand);
|
|
writeTokenText(node.operator);
|
|
}
|
|
|
|
function emitBinaryExpression(node: BinaryExpression) {
|
|
const isCommaOperator = node.operatorToken.kind !== SyntaxKind.CommaToken;
|
|
const indentBeforeOperator = needsIndentation(node, node.left, node.operatorToken);
|
|
const indentAfterOperator = needsIndentation(node, node.operatorToken, node.right);
|
|
|
|
emitExpression(node.left);
|
|
increaseIndentIf(indentBeforeOperator, isCommaOperator ? " " : undefined);
|
|
writeTokenText(node.operatorToken.kind);
|
|
increaseIndentIf(indentAfterOperator, " ");
|
|
emitExpression(node.right);
|
|
decreaseIndentIf(indentBeforeOperator, indentAfterOperator);
|
|
}
|
|
|
|
function emitConditionalExpression(node: ConditionalExpression) {
|
|
const indentBeforeQuestion = needsIndentation(node, node.condition, node.questionToken);
|
|
const indentAfterQuestion = needsIndentation(node, node.questionToken, node.whenTrue);
|
|
const indentBeforeColon = needsIndentation(node, node.whenTrue, node.colonToken);
|
|
const indentAfterColon = needsIndentation(node, node.colonToken, node.whenFalse);
|
|
|
|
emitExpression(node.condition);
|
|
increaseIndentIf(indentBeforeQuestion, " ");
|
|
write("?");
|
|
increaseIndentIf(indentAfterQuestion, " ");
|
|
emitExpression(node.whenTrue);
|
|
decreaseIndentIf(indentBeforeQuestion, indentAfterQuestion);
|
|
|
|
increaseIndentIf(indentBeforeColon, " ");
|
|
write(":");
|
|
increaseIndentIf(indentAfterColon, " ");
|
|
emitExpression(node.whenFalse);
|
|
decreaseIndentIf(indentBeforeColon, indentAfterColon);
|
|
}
|
|
|
|
function emitTemplateExpression(node: TemplateExpression) {
|
|
emit(node.head);
|
|
emitList(node, node.templateSpans, ListFormat.TemplateExpressionSpans);
|
|
}
|
|
|
|
function emitYieldExpression(node: YieldExpression) {
|
|
write(node.asteriskToken ? "yield*" : "yield");
|
|
emitExpressionWithPrefix(" ", node.expression);
|
|
}
|
|
|
|
function emitSpreadElementExpression(node: SpreadElementExpression) {
|
|
write("...");
|
|
emitExpression(node.expression);
|
|
}
|
|
|
|
function emitClassExpression(node: ClassExpression) {
|
|
emitClassDeclarationOrExpression(node);
|
|
}
|
|
|
|
function emitExpressionWithTypeArguments(node: ExpressionWithTypeArguments) {
|
|
emitExpression(node.expression);
|
|
emitTypeArguments(node, node.typeArguments);
|
|
}
|
|
|
|
function emitAsExpression(node: AsExpression) {
|
|
emitExpression(node.expression);
|
|
if (node.type) {
|
|
write(" as ");
|
|
emit(node.type);
|
|
}
|
|
}
|
|
|
|
function emitNonNullExpression(node: NonNullExpression) {
|
|
emitExpression(node.expression);
|
|
write("!");
|
|
}
|
|
|
|
//
|
|
// Misc
|
|
//
|
|
|
|
function emitTemplateSpan(node: TemplateSpan) {
|
|
emitExpression(node.expression);
|
|
emit(node.literal);
|
|
}
|
|
|
|
//
|
|
// Statements
|
|
//
|
|
|
|
function emitBlock(node: Block, format?: ListFormat) {
|
|
if (isSingleLineEmptyBlock(node)) {
|
|
writeToken(SyntaxKind.OpenBraceToken, node.pos, /*contextNode*/ node);
|
|
write(" ");
|
|
writeToken(SyntaxKind.CloseBraceToken, node.statements.end, /*contextNode*/ node);
|
|
}
|
|
else {
|
|
writeToken(SyntaxKind.OpenBraceToken, node.pos, /*contextNode*/ node);
|
|
emitBlockStatements(node);
|
|
writeToken(SyntaxKind.CloseBraceToken, node.statements.end, /*contextNode*/ node);
|
|
}
|
|
}
|
|
|
|
function emitBlockStatements(node: Block) {
|
|
if (node.emitFlags & NodeEmitFlags.SingleLine) {
|
|
emitList(node, node.statements, ListFormat.SingleLineBlockStatements);
|
|
}
|
|
else {
|
|
emitList(node, node.statements, ListFormat.MultiLineBlockStatements);
|
|
}
|
|
}
|
|
|
|
function emitVariableStatement(node: VariableStatement) {
|
|
emitModifiers(node, node.modifiers);
|
|
emit(node.declarationList);
|
|
write(";");
|
|
}
|
|
|
|
function emitEmptyStatement(node: EmptyStatement) {
|
|
write(";");
|
|
}
|
|
|
|
function emitExpressionStatement(node: ExpressionStatement) {
|
|
emitExpression(node.expression);
|
|
write(";");
|
|
}
|
|
|
|
function emitIfStatement(node: IfStatement) {
|
|
const openParenPos = writeToken(SyntaxKind.IfKeyword, node.pos, node);
|
|
write(" ");
|
|
writeToken(SyntaxKind.OpenParenToken, openParenPos, node);
|
|
emitExpression(node.expression);
|
|
writeToken(SyntaxKind.CloseParenToken, node.expression.end, node);
|
|
emitEmbeddedStatement(node.thenStatement);
|
|
if (node.elseStatement) {
|
|
writeLine();
|
|
writeToken(SyntaxKind.ElseKeyword, node.thenStatement.end, node);
|
|
if (node.elseStatement.kind === SyntaxKind.IfStatement) {
|
|
write(" ");
|
|
emit(node.elseStatement);
|
|
}
|
|
else {
|
|
emitEmbeddedStatement(node.elseStatement);
|
|
}
|
|
}
|
|
}
|
|
|
|
function emitDoStatement(node: DoStatement) {
|
|
write("do");
|
|
emitEmbeddedStatement(node.statement);
|
|
if (isBlock(node.statement)) {
|
|
write(" ");
|
|
}
|
|
else {
|
|
writeLine();
|
|
}
|
|
|
|
write("while (");
|
|
emitExpression(node.expression);
|
|
write(");");
|
|
}
|
|
|
|
function emitWhileStatement(node: WhileStatement) {
|
|
write("while (");
|
|
emitExpression(node.expression);
|
|
write(")");
|
|
emitEmbeddedStatement(node.statement);
|
|
}
|
|
|
|
function emitForStatement(node: ForStatement) {
|
|
const openParenPos = writeToken(SyntaxKind.ForKeyword, node.pos);
|
|
write(" ");
|
|
writeToken(SyntaxKind.OpenParenToken, openParenPos, /*contextNode*/ node);
|
|
emitForBinding(node.initializer);
|
|
write(";");
|
|
emitExpressionWithPrefix(" ", node.condition);
|
|
write(";");
|
|
emitExpressionWithPrefix(" ", node.incrementor);
|
|
write(")");
|
|
emitEmbeddedStatement(node.statement);
|
|
}
|
|
|
|
function emitForInStatement(node: ForInStatement) {
|
|
const openParenPos = writeToken(SyntaxKind.ForKeyword, node.pos);
|
|
write(" ");
|
|
writeToken(SyntaxKind.OpenParenToken, openParenPos);
|
|
emitForBinding(node.initializer);
|
|
write(" in ");
|
|
emitExpression(node.expression);
|
|
writeToken(SyntaxKind.CloseParenToken, node.expression.end);
|
|
emitEmbeddedStatement(node.statement);
|
|
}
|
|
|
|
function emitForOfStatement(node: ForOfStatement) {
|
|
const openParenPos = writeToken(SyntaxKind.ForKeyword, node.pos);
|
|
write(" ");
|
|
writeToken(SyntaxKind.OpenParenToken, openParenPos);
|
|
emitForBinding(node.initializer);
|
|
write(" of ");
|
|
emitExpression(node.expression);
|
|
writeToken(SyntaxKind.CloseParenToken, node.expression.end);
|
|
emitEmbeddedStatement(node.statement);
|
|
}
|
|
|
|
function emitForBinding(node: VariableDeclarationList | Expression) {
|
|
if (node !== undefined) {
|
|
if (node.kind === SyntaxKind.VariableDeclarationList) {
|
|
emit(node);
|
|
}
|
|
else {
|
|
emitExpression(<Expression>node);
|
|
}
|
|
}
|
|
}
|
|
|
|
function emitContinueStatement(node: ContinueStatement) {
|
|
writeToken(SyntaxKind.ContinueKeyword, node.pos);
|
|
emitWithPrefix(" ", node.label);
|
|
write(";");
|
|
}
|
|
|
|
function emitBreakStatement(node: BreakStatement) {
|
|
writeToken(SyntaxKind.BreakKeyword, node.pos);
|
|
emitWithPrefix(" ", node.label);
|
|
write(";");
|
|
}
|
|
|
|
function emitReturnStatement(node: ReturnStatement) {
|
|
writeToken(SyntaxKind.ReturnKeyword, node.pos, /*contextNode*/ node);
|
|
emitExpressionWithPrefix(" ", node.expression);
|
|
write(";");
|
|
}
|
|
|
|
function emitWithStatement(node: WithStatement) {
|
|
write("with (");
|
|
emitExpression(node.expression);
|
|
write(")");
|
|
emitEmbeddedStatement(node.statement);
|
|
}
|
|
|
|
function emitSwitchStatement(node: SwitchStatement) {
|
|
const openParenPos = writeToken(SyntaxKind.SwitchKeyword, node.pos);
|
|
write(" ");
|
|
writeToken(SyntaxKind.OpenParenToken, openParenPos);
|
|
emitExpression(node.expression);
|
|
writeToken(SyntaxKind.CloseParenToken, node.expression.end);
|
|
write(" ");
|
|
emit(node.caseBlock);
|
|
}
|
|
|
|
function emitLabeledStatement(node: LabeledStatement) {
|
|
emit(node.label);
|
|
write(": ");
|
|
emit(node.statement);
|
|
}
|
|
|
|
function emitThrowStatement(node: ThrowStatement) {
|
|
write("throw");
|
|
emitExpressionWithPrefix(" ", node.expression);
|
|
write(";");
|
|
}
|
|
|
|
function emitTryStatement(node: TryStatement) {
|
|
write("try ");
|
|
emit(node.tryBlock);
|
|
emit(node.catchClause);
|
|
if (node.finallyBlock) {
|
|
writeLine();
|
|
write("finally ");
|
|
emit(node.finallyBlock);
|
|
}
|
|
}
|
|
|
|
function emitDebuggerStatement(node: DebuggerStatement) {
|
|
writeToken(SyntaxKind.DebuggerKeyword, node.pos);
|
|
write(";");
|
|
}
|
|
|
|
//
|
|
// Declarations
|
|
//
|
|
|
|
function emitVariableDeclaration(node: VariableDeclaration) {
|
|
emit(node.name);
|
|
emitExpressionWithPrefix(" = ", node.initializer);
|
|
}
|
|
|
|
function emitVariableDeclarationList(node: VariableDeclarationList) {
|
|
write(isLet(node) ? "let " : isConst(node) ? "const " : "var ");
|
|
emitList(node, node.declarations, ListFormat.VariableDeclarationList);
|
|
}
|
|
|
|
function emitFunctionDeclaration(node: FunctionDeclaration) {
|
|
emitFunctionDeclarationOrExpression(node);
|
|
}
|
|
|
|
function emitFunctionDeclarationOrExpression(node: FunctionDeclaration | FunctionExpression) {
|
|
emitDecorators(node, node.decorators);
|
|
emitModifiers(node, node.modifiers);
|
|
write(node.asteriskToken ? "function* " : "function ");
|
|
emitIdentifierName(node.name);
|
|
emitSignatureAndBody(node, emitSignatureHead);
|
|
}
|
|
|
|
function emitSignatureAndBody(node: FunctionLikeDeclaration, emitSignatureHead: (node: SignatureDeclaration) => void) {
|
|
const body = node.body;
|
|
if (body) {
|
|
if (isBlock(body)) {
|
|
const indentedFlag = node.emitFlags & NodeEmitFlags.Indented;
|
|
if (indentedFlag) {
|
|
increaseIndent();
|
|
}
|
|
|
|
if (node.emitFlags & NodeEmitFlags.ReuseTempVariableScope) {
|
|
emitSignatureHead(node);
|
|
emitBlockFunctionBody(node, body);
|
|
}
|
|
else {
|
|
const savedTempFlags = tempFlags;
|
|
tempFlags = 0;
|
|
emitSignatureHead(node);
|
|
emitBlockFunctionBody(node, body);
|
|
tempFlags = savedTempFlags;
|
|
}
|
|
|
|
if (indentedFlag) {
|
|
decreaseIndent();
|
|
}
|
|
}
|
|
else {
|
|
emitSignatureHead(node);
|
|
write(" ");
|
|
emitExpression(body);
|
|
}
|
|
}
|
|
else {
|
|
emitSignatureHead(node);
|
|
write(";");
|
|
}
|
|
|
|
}
|
|
|
|
function emitSignatureHead(node: FunctionDeclaration | FunctionExpression | MethodDeclaration | AccessorDeclaration | ConstructorDeclaration) {
|
|
emitTypeParameters(node, node.typeParameters);
|
|
emitParameters(node, node.parameters);
|
|
emitWithPrefix(": ", node.type);
|
|
}
|
|
|
|
function shouldEmitBlockFunctionBodyOnSingleLine(parentNode: Node, body: Block) {
|
|
// We must emit a function body as a single-line body in the following case:
|
|
// * The body has NodeEmitFlags.SingleLine specified.
|
|
|
|
// We must emit a function body as a multi-line body in the following cases:
|
|
// * The body is explicitly marked as multi-line.
|
|
// * A non-synthesized body's start and end position are on different lines.
|
|
// * Any statement in the body starts on a new line.
|
|
|
|
if (body.emitFlags & NodeEmitFlags.SingleLine) {
|
|
return true;
|
|
}
|
|
|
|
if (body.multiLine) {
|
|
return false;
|
|
}
|
|
|
|
if (!nodeIsSynthesized(body) && !rangeIsOnSingleLine(body, currentSourceFile)) {
|
|
return false;
|
|
}
|
|
|
|
if (shouldWriteLeadingLineTerminator(body, body.statements, ListFormat.PreserveLines)
|
|
|| shouldWriteClosingLineTerminator(body, body.statements, ListFormat.PreserveLines)) {
|
|
return false;
|
|
}
|
|
|
|
let previousStatement: Statement;
|
|
for (const statement of body.statements) {
|
|
if (shouldWriteSeparatingLineTerminator(previousStatement, statement, ListFormat.PreserveLines)) {
|
|
return false;
|
|
}
|
|
|
|
previousStatement = statement;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
function emitBlockFunctionBody(parentNode: Node, body: Block) {
|
|
write(" {");
|
|
increaseIndent();
|
|
|
|
emitBodyWithDetachedComments(body, body.statements,
|
|
shouldEmitBlockFunctionBodyOnSingleLine(parentNode, body)
|
|
? emitBlockFunctionBodyOnSingleLine
|
|
: emitBlockFunctionBodyWorker);
|
|
|
|
decreaseIndent();
|
|
writeToken(SyntaxKind.CloseBraceToken, body.statements.end, body);
|
|
}
|
|
|
|
function emitBlockFunctionBodyOnSingleLine(body: Block) {
|
|
emitBlockFunctionBodyWorker(body, /*emitBlockFunctionBodyOnSingleLine*/ true);
|
|
}
|
|
|
|
function emitBlockFunctionBodyWorker(body: Block, emitBlockFunctionBodyOnSingleLine?: boolean) {
|
|
// Emit all the prologue directives (like "use strict").
|
|
const statementOffset = emitPrologueDirectives(body.statements, /*startWithNewLine*/ true);
|
|
const helpersEmitted = emitHelpers(body);
|
|
|
|
if (statementOffset === 0 && !helpersEmitted && emitBlockFunctionBodyOnSingleLine) {
|
|
decreaseIndent();
|
|
emitList(body, body.statements, ListFormat.SingleLineFunctionBodyStatements);
|
|
increaseIndent();
|
|
}
|
|
else {
|
|
emitList(body, body.statements, ListFormat.MultiLineFunctionBodyStatements, statementOffset);
|
|
}
|
|
}
|
|
|
|
function emitClassDeclaration(node: ClassDeclaration) {
|
|
emitClassDeclarationOrExpression(node);
|
|
}
|
|
|
|
function emitClassDeclarationOrExpression(node: ClassDeclaration | ClassExpression) {
|
|
emitDecorators(node, node.decorators);
|
|
emitModifiers(node, node.modifiers);
|
|
write("class");
|
|
emitNodeWithPrefix(" ", node.name, emitIdentifierName);
|
|
|
|
const indentedFlag = node.emitFlags & NodeEmitFlags.Indented;
|
|
if (indentedFlag) {
|
|
increaseIndent();
|
|
}
|
|
|
|
emitTypeParameters(node, node.typeParameters);
|
|
emitList(node, node.heritageClauses, ListFormat.ClassHeritageClauses);
|
|
|
|
const savedTempFlags = tempFlags;
|
|
tempFlags = 0;
|
|
|
|
write(" {");
|
|
emitList(node, node.members, ListFormat.ClassMembers);
|
|
write("}");
|
|
|
|
if (indentedFlag) {
|
|
decreaseIndent();
|
|
}
|
|
|
|
tempFlags = savedTempFlags;
|
|
}
|
|
|
|
function emitInterfaceDeclaration(node: InterfaceDeclaration) {
|
|
emitDecorators(node, node.decorators);
|
|
emitModifiers(node, node.modifiers);
|
|
write("interface ");
|
|
emit(node.name);
|
|
emitTypeParameters(node, node.typeParameters);
|
|
emitList(node, node.heritageClauses, ListFormat.HeritageClauses);
|
|
write(" {");
|
|
emitList(node, node.members, ListFormat.InterfaceMembers);
|
|
write("}");
|
|
}
|
|
|
|
function emitTypeAliasDeclaration(node: TypeAliasDeclaration) {
|
|
emitDecorators(node, node.decorators);
|
|
emitModifiers(node, node.modifiers);
|
|
write("type ");
|
|
emit(node.name);
|
|
emitTypeParameters(node, node.typeParameters);
|
|
write(" = ");
|
|
emit(node.type);
|
|
write(";");
|
|
}
|
|
|
|
function emitEnumDeclaration(node: EnumDeclaration) {
|
|
emitModifiers(node, node.modifiers);
|
|
write("enum ");
|
|
emit(node.name);
|
|
|
|
const savedTempFlags = tempFlags;
|
|
tempFlags = 0;
|
|
|
|
write(" {");
|
|
emitList(node, node.members, ListFormat.EnumMembers);
|
|
write("}");
|
|
tempFlags = savedTempFlags;
|
|
}
|
|
|
|
function emitModuleDeclaration(node: ModuleDeclaration) {
|
|
emitModifiers(node, node.modifiers);
|
|
write(node.flags & NodeFlags.Namespace ? "namespace " : "module ");
|
|
emit(node.name);
|
|
|
|
let body = node.body;
|
|
while (body.kind === SyntaxKind.ModuleDeclaration) {
|
|
write(".");
|
|
emit((<ModuleDeclaration>body).name);
|
|
body = (<ModuleDeclaration>body).body;
|
|
}
|
|
|
|
write(" ");
|
|
emit(body);
|
|
}
|
|
|
|
function emitModuleBlock(node: ModuleBlock) {
|
|
if (isSingleLineEmptyBlock(node)) {
|
|
write("{ }");
|
|
}
|
|
else {
|
|
const savedTempFlags = tempFlags;
|
|
tempFlags = 0;
|
|
write("{");
|
|
increaseIndent();
|
|
emitBlockStatements(node);
|
|
write("}");
|
|
tempFlags = savedTempFlags;
|
|
}
|
|
}
|
|
|
|
function emitCaseBlock(node: CaseBlock) {
|
|
writeToken(SyntaxKind.OpenBraceToken, node.pos);
|
|
emitList(node, node.clauses, ListFormat.CaseBlockClauses);
|
|
writeToken(SyntaxKind.CloseBraceToken, node.clauses.end);
|
|
}
|
|
|
|
function emitImportEqualsDeclaration(node: ImportEqualsDeclaration) {
|
|
emitModifiers(node, node.modifiers);
|
|
write("import ");
|
|
emit(node.name);
|
|
write(" = ");
|
|
emitModuleReference(node.moduleReference);
|
|
write(";");
|
|
}
|
|
|
|
function emitModuleReference(node: ModuleReference) {
|
|
if (node.kind === SyntaxKind.Identifier) {
|
|
emitExpression(<Identifier>node);
|
|
}
|
|
else {
|
|
emit(node);
|
|
}
|
|
}
|
|
|
|
function emitImportDeclaration(node: ImportDeclaration) {
|
|
emitModifiers(node, node.modifiers);
|
|
write("import ");
|
|
if (node.importClause) {
|
|
emit(node.importClause);
|
|
write(" from ");
|
|
}
|
|
emitExpression(node.moduleSpecifier);
|
|
write(";");
|
|
}
|
|
|
|
function emitImportClause(node: ImportClause) {
|
|
emit(node.name);
|
|
if (node.name && node.namedBindings) {
|
|
write(", ");
|
|
}
|
|
emit(node.namedBindings);
|
|
}
|
|
|
|
function emitNamespaceImport(node: NamespaceImport) {
|
|
write("* as ");
|
|
emit(node.name);
|
|
}
|
|
|
|
function emitNamedImports(node: NamedImports) {
|
|
emitNamedImportsOrExports(node);
|
|
}
|
|
|
|
function emitImportSpecifier(node: ImportSpecifier) {
|
|
emitImportOrExportSpecifier(node);
|
|
}
|
|
|
|
function emitExportAssignment(node: ExportAssignment) {
|
|
write(node.isExportEquals ? "export = " : "export default ");
|
|
emitExpression(node.expression);
|
|
write(";");
|
|
}
|
|
|
|
function emitExportDeclaration(node: ExportDeclaration) {
|
|
write("export ");
|
|
if (node.exportClause) {
|
|
emit(node.exportClause);
|
|
}
|
|
else {
|
|
write("*");
|
|
}
|
|
if (node.moduleSpecifier) {
|
|
write(" from ");
|
|
emitExpression(node.moduleSpecifier);
|
|
}
|
|
write(";");
|
|
}
|
|
|
|
function emitNamedExports(node: NamedExports) {
|
|
emitNamedImportsOrExports(node);
|
|
}
|
|
|
|
function emitExportSpecifier(node: ExportSpecifier) {
|
|
emitImportOrExportSpecifier(node);
|
|
}
|
|
|
|
function emitNamedImportsOrExports(node: NamedImportsOrExports) {
|
|
write("{");
|
|
emitList(node, node.elements, ListFormat.NamedImportsOrExportsElements);
|
|
write("}");
|
|
}
|
|
|
|
function emitImportOrExportSpecifier(node: ImportOrExportSpecifier) {
|
|
if (node.propertyName) {
|
|
emit(node.propertyName);
|
|
write(" as ");
|
|
}
|
|
|
|
emit(node.name);
|
|
}
|
|
|
|
//
|
|
// Module references
|
|
//
|
|
|
|
function emitExternalModuleReference(node: ExternalModuleReference) {
|
|
write("require(");
|
|
emitExpression(node.expression);
|
|
write(")");
|
|
}
|
|
|
|
//
|
|
// JSX
|
|
//
|
|
|
|
function emitJsxElement(node: JsxElement) {
|
|
emit(node.openingElement);
|
|
emitList(node, node.children, ListFormat.JsxElementChildren);
|
|
emit(node.closingElement);
|
|
}
|
|
|
|
function emitJsxSelfClosingElement(node: JsxSelfClosingElement) {
|
|
write("<");
|
|
emitJsxTagName(node.tagName);
|
|
write(" ");
|
|
emitList(node, node.attributes, ListFormat.JsxElementAttributes);
|
|
write("/>");
|
|
}
|
|
|
|
function emitJsxOpeningElement(node: JsxOpeningElement) {
|
|
write("<");
|
|
emitJsxTagName(node.tagName);
|
|
writeIfAny(node.attributes, " ");
|
|
emitList(node, node.attributes, ListFormat.JsxElementAttributes);
|
|
write(">");
|
|
}
|
|
|
|
function emitJsxText(node: JsxText) {
|
|
writer.writeLiteral(getTextOfNode(node, /*includeTrivia*/ true));
|
|
}
|
|
|
|
function emitJsxClosingElement(node: JsxClosingElement) {
|
|
write("</");
|
|
emitJsxTagName(node.tagName);
|
|
write(">");
|
|
}
|
|
|
|
function emitJsxAttribute(node: JsxAttribute) {
|
|
emit(node.name);
|
|
emitWithPrefix("=", node.initializer);
|
|
}
|
|
|
|
function emitJsxSpreadAttribute(node: JsxSpreadAttribute) {
|
|
write("{...");
|
|
emitExpression(node.expression);
|
|
write("}");
|
|
}
|
|
|
|
function emitJsxExpression(node: JsxExpression) {
|
|
if (node.expression) {
|
|
write("{");
|
|
emitExpression(node.expression);
|
|
write("}");
|
|
}
|
|
}
|
|
|
|
function emitJsxTagName(node: JsxTagNameExpression) {
|
|
if (node.kind === SyntaxKind.Identifier) {
|
|
emitExpression(<Identifier>node);
|
|
}
|
|
else {
|
|
emit(node);
|
|
}
|
|
}
|
|
|
|
//
|
|
// Clauses
|
|
//
|
|
|
|
function emitCaseClause(node: CaseClause) {
|
|
write("case ");
|
|
emitExpression(node.expression);
|
|
write(":");
|
|
|
|
emitCaseOrDefaultClauseStatements(node, node.statements);
|
|
}
|
|
|
|
function emitDefaultClause(node: DefaultClause) {
|
|
write("default:");
|
|
emitCaseOrDefaultClauseStatements(node, node.statements);
|
|
}
|
|
|
|
function emitCaseOrDefaultClauseStatements(parentNode: Node, statements: NodeArray<Statement>) {
|
|
const emitAsSingleStatement =
|
|
statements.length === 1 &&
|
|
(
|
|
// treat synthesized nodes as located on the same line for emit purposes
|
|
nodeIsSynthesized(parentNode) ||
|
|
nodeIsSynthesized(statements[0]) ||
|
|
rangeStartPositionsAreOnSameLine(parentNode, statements[0], currentSourceFile)
|
|
);
|
|
|
|
if (emitAsSingleStatement) {
|
|
write(" ");
|
|
emit(statements[0]);
|
|
}
|
|
else {
|
|
emitList(parentNode, statements, ListFormat.CaseOrDefaultClauseStatements);
|
|
}
|
|
}
|
|
|
|
function emitHeritageClause(node: HeritageClause) {
|
|
write(" ");
|
|
writeTokenText(node.token);
|
|
write(" ");
|
|
emitList(node, node.types, ListFormat.HeritageClauseTypes);
|
|
}
|
|
|
|
function emitCatchClause(node: CatchClause) {
|
|
writeLine();
|
|
const openParenPos = writeToken(SyntaxKind.CatchKeyword, node.pos);
|
|
write(" ");
|
|
writeToken(SyntaxKind.OpenParenToken, openParenPos);
|
|
emit(node.variableDeclaration);
|
|
writeToken(SyntaxKind.CloseParenToken, node.variableDeclaration ? node.variableDeclaration.end : openParenPos);
|
|
write(" ");
|
|
emit(node.block);
|
|
}
|
|
|
|
//
|
|
// Property assignments
|
|
//
|
|
|
|
function emitPropertyAssignment(node: PropertyAssignment) {
|
|
emit(node.name);
|
|
write(": ");
|
|
// This is to ensure that we emit comment in the following case:
|
|
// For example:
|
|
// obj = {
|
|
// id: /*comment1*/ ()=>void
|
|
// }
|
|
// "comment1" is not considered to be leading comment for node.initializer
|
|
// but rather a trailing comment on the previous node.
|
|
const initializer = node.initializer;
|
|
if (!shouldSkipLeadingCommentsForNode(initializer)) {
|
|
const commentRange = initializer.commentRange || initializer;
|
|
emitTrailingCommentsOfPosition(commentRange.pos);
|
|
}
|
|
|
|
emitExpression(initializer);
|
|
}
|
|
|
|
function emitShorthandPropertyAssignment(node: ShorthandPropertyAssignment) {
|
|
emit(node.name);
|
|
if (node.objectAssignmentInitializer) {
|
|
write(" = ");
|
|
emitExpression(node.objectAssignmentInitializer);
|
|
}
|
|
}
|
|
|
|
//
|
|
// Enum
|
|
//
|
|
|
|
function emitEnumMember(node: EnumMember) {
|
|
emit(node.name);
|
|
emitExpressionWithPrefix(" = ", node.initializer);
|
|
}
|
|
|
|
//
|
|
// Top-level nodes
|
|
//
|
|
|
|
function emitSourceFile(node: SourceFile) {
|
|
writeLine();
|
|
emitShebang();
|
|
emitBodyWithDetachedComments(node, node.statements, emitSourceFileWorker);
|
|
}
|
|
|
|
function emitSourceFileWorker(node: SourceFile) {
|
|
const statements = node.statements;
|
|
const statementOffset = emitPrologueDirectives(statements);
|
|
const savedTempFlags = tempFlags;
|
|
tempFlags = 0;
|
|
emitHelpers(node);
|
|
emitList(node, statements, ListFormat.MultiLine, statementOffset);
|
|
tempFlags = savedTempFlags;
|
|
}
|
|
|
|
// Transformation nodes
|
|
|
|
function emitPartiallyEmittedExpression(node: PartiallyEmittedExpression) {
|
|
emitExpression(node.expression);
|
|
}
|
|
|
|
/**
|
|
* Emits any prologue directives at the start of a Statement list, returning the
|
|
* number of prologue directives written to the output.
|
|
*/
|
|
function emitPrologueDirectives(statements: Node[], startWithNewLine?: boolean): number {
|
|
for (let i = 0; i < statements.length; i++) {
|
|
if (isPrologueDirective(statements[i])) {
|
|
if (startWithNewLine || i > 0) {
|
|
writeLine();
|
|
}
|
|
emit(statements[i]);
|
|
}
|
|
else {
|
|
// return index of the first non prologue directive
|
|
return i;
|
|
}
|
|
}
|
|
|
|
return statements.length;
|
|
}
|
|
|
|
function emitHelpers(node: Node) {
|
|
const emitFlags = node.emitFlags;
|
|
let helpersEmitted = false;
|
|
if (emitFlags & NodeEmitFlags.EmitEmitHelpers) {
|
|
helpersEmitted = emitEmitHelpers(currentSourceFile);
|
|
}
|
|
|
|
if (emitFlags & NodeEmitFlags.EmitExportStar) {
|
|
writeLines(exportStarHelper);
|
|
helpersEmitted = true;
|
|
}
|
|
|
|
if (emitFlags & NodeEmitFlags.EmitSuperHelper) {
|
|
writeLines(superHelper);
|
|
helpersEmitted = true;
|
|
}
|
|
|
|
if (emitFlags & NodeEmitFlags.EmitAdvancedSuperHelper) {
|
|
writeLines(advancedSuperHelper);
|
|
helpersEmitted = true;
|
|
}
|
|
|
|
return helpersEmitted;
|
|
}
|
|
|
|
function emitEmitHelpers(node: SourceFile) {
|
|
// Only emit helpers if the user did not say otherwise.
|
|
if (compilerOptions.noEmitHelpers) {
|
|
return false;
|
|
}
|
|
|
|
// Don't emit helpers if we can import them.
|
|
if (compilerOptions.importHelpers
|
|
&& (isExternalModule(node) || compilerOptions.isolatedModules)) {
|
|
return false;
|
|
}
|
|
|
|
let helpersEmitted = false;
|
|
|
|
// Only Emit __extends function when target ES5.
|
|
// For target ES6 and above, we can emit classDeclaration as is.
|
|
if ((languageVersion < ScriptTarget.ES6) && (!extendsEmitted && node.flags & NodeFlags.HasClassExtends)) {
|
|
writeLines(extendsHelper);
|
|
extendsEmitted = true;
|
|
helpersEmitted = true;
|
|
}
|
|
|
|
if (compilerOptions.jsx !== JsxEmit.Preserve && !assignEmitted && (node.flags & NodeFlags.HasJsxSpreadAttributes)) {
|
|
writeLines(assignHelper);
|
|
assignEmitted = true;
|
|
}
|
|
|
|
if (!decorateEmitted && node.flags & NodeFlags.HasDecorators) {
|
|
writeLines(decorateHelper);
|
|
if (compilerOptions.emitDecoratorMetadata) {
|
|
writeLines(metadataHelper);
|
|
}
|
|
|
|
decorateEmitted = true;
|
|
helpersEmitted = true;
|
|
}
|
|
|
|
if (!paramEmitted && node.flags & NodeFlags.HasParamDecorators) {
|
|
writeLines(paramHelper);
|
|
paramEmitted = true;
|
|
helpersEmitted = true;
|
|
}
|
|
|
|
if (!awaiterEmitted && node.flags & NodeFlags.HasAsyncFunctions) {
|
|
writeLines(awaiterHelper);
|
|
if (languageVersion < ScriptTarget.ES6) {
|
|
writeLines(generatorHelper);
|
|
}
|
|
|
|
awaiterEmitted = true;
|
|
helpersEmitted = true;
|
|
}
|
|
|
|
if (helpersEmitted) {
|
|
writeLine();
|
|
}
|
|
|
|
return helpersEmitted;
|
|
}
|
|
|
|
function writeLines(text: string): void {
|
|
const lines = text.split(/\r\n|\r|\n/g);
|
|
for (let i = 0; i < lines.length; i++) {
|
|
const line = lines[i];
|
|
if (line.length) {
|
|
if (i > 0) {
|
|
writeLine();
|
|
}
|
|
write(line);
|
|
}
|
|
}
|
|
}
|
|
|
|
//
|
|
// Helpers
|
|
//
|
|
|
|
function emitShebang() {
|
|
const shebang = getShebang(currentText);
|
|
if (shebang) {
|
|
write(shebang);
|
|
writeLine();
|
|
}
|
|
}
|
|
|
|
function emitModifiers(node: Node, modifiers: NodeArray<Modifier>) {
|
|
if (modifiers && modifiers.length) {
|
|
emitList(node, modifiers, ListFormat.Modifiers);
|
|
write(" ");
|
|
}
|
|
}
|
|
|
|
function emitWithPrefix(prefix: string, node: Node) {
|
|
emitNodeWithPrefix(prefix, node, emit);
|
|
}
|
|
|
|
function emitExpressionWithPrefix(prefix: string, node: Node) {
|
|
emitNodeWithPrefix(prefix, node, emitExpression);
|
|
}
|
|
|
|
function emitNodeWithPrefix(prefix: string, node: Node, emit: (node: Node) => void) {
|
|
if (node) {
|
|
write(prefix);
|
|
emit(node);
|
|
}
|
|
}
|
|
|
|
function emitWithSuffix(node: Node, suffix: string) {
|
|
if (node) {
|
|
emit(node);
|
|
write(suffix);
|
|
}
|
|
}
|
|
|
|
function tryEmitSubstitute(node: Node, emitNode: (node: Node) => void, isExpression: boolean) {
|
|
if (isSubstitutionEnabled(node) && (node.emitFlags & NodeEmitFlags.NoSubstitution) === 0) {
|
|
const substitute = onSubstituteNode(node, isExpression);
|
|
if (substitute !== node) {
|
|
substitute.emitFlags |= NodeEmitFlags.NoSubstitution;
|
|
emitNode(substitute);
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
function tryEmitConstantValue(node: PropertyAccessExpression | ElementAccessExpression): boolean {
|
|
const constantValue = tryGetConstEnumValue(node);
|
|
if (constantValue !== undefined) {
|
|
write(String(constantValue));
|
|
if (!compilerOptions.removeComments) {
|
|
const propertyName = isPropertyAccessExpression(node)
|
|
? declarationNameToString(node.name)
|
|
: getTextOfNode(node.argumentExpression);
|
|
write(` /* ${propertyName} */`);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
function emitEmbeddedStatement(node: Statement) {
|
|
if (isBlock(node)) {
|
|
write(" ");
|
|
emit(node);
|
|
}
|
|
else {
|
|
writeLine();
|
|
increaseIndent();
|
|
emit(node);
|
|
decreaseIndent();
|
|
}
|
|
}
|
|
|
|
function emitDecorators(parentNode: Node, decorators: NodeArray<Decorator>) {
|
|
emitList(parentNode, decorators, ListFormat.Decorators);
|
|
}
|
|
|
|
function emitTypeArguments(parentNode: Node, typeArguments: NodeArray<TypeNode>) {
|
|
emitList(parentNode, typeArguments, ListFormat.TypeArguments);
|
|
}
|
|
|
|
function emitTypeParameters(parentNode: Node, typeParameters: NodeArray<TypeParameterDeclaration>) {
|
|
emitList(parentNode, typeParameters, ListFormat.TypeParameters);
|
|
}
|
|
|
|
function emitParameters(parentNode: Node, parameters: NodeArray<ParameterDeclaration>) {
|
|
emitList(parentNode, parameters, ListFormat.Parameters);
|
|
}
|
|
|
|
function emitParametersForArrow(parentNode: Node, parameters: NodeArray<ParameterDeclaration>) {
|
|
if (parameters &&
|
|
parameters.length === 1 &&
|
|
parameters[0].type === undefined &&
|
|
parameters[0].pos === parentNode.pos) {
|
|
emit(parameters[0]);
|
|
}
|
|
else {
|
|
emitParameters(parentNode, parameters);
|
|
}
|
|
}
|
|
|
|
function emitParametersForIndexSignature(parentNode: Node, parameters: NodeArray<ParameterDeclaration>) {
|
|
emitList(parentNode, parameters, ListFormat.IndexSignatureParameters);
|
|
}
|
|
|
|
function emitList(parentNode: Node, children: NodeArray<Node>, format: ListFormat, start?: number, count?: number) {
|
|
emitNodeList(emit, parentNode, children, format, start, count);
|
|
}
|
|
|
|
function emitExpressionList(parentNode: Node, children: NodeArray<Node>, format: ListFormat, start?: number, count?: number) {
|
|
emitNodeList(emitExpression, parentNode, children, format, start, count);
|
|
}
|
|
|
|
function emitNodeList(emit: (node: Node) => void, parentNode: Node, children: NodeArray<Node>, format: ListFormat, start = 0, count = children ? children.length - start : 0) {
|
|
const isUndefined = children === undefined;
|
|
if (isUndefined && format & ListFormat.OptionalIfUndefined) {
|
|
return;
|
|
}
|
|
|
|
const isEmpty = isUndefined || children.length === 0 || start >= children.length || count === 0;
|
|
if (isEmpty && format & ListFormat.OptionalIfEmpty) {
|
|
return;
|
|
}
|
|
|
|
if (format & ListFormat.BracketsMask) {
|
|
write(getOpeningBracket(format));
|
|
}
|
|
|
|
if (isEmpty) {
|
|
// Write a line terminator if the parent node was multi-line
|
|
if (format & ListFormat.MultiLine) {
|
|
writeLine();
|
|
}
|
|
else if (format & ListFormat.SpaceBetweenBraces) {
|
|
write(" ");
|
|
}
|
|
}
|
|
else {
|
|
// Write the opening line terminator or leading whitespace.
|
|
const mayEmitInterveningComments = (format & ListFormat.NoInterveningComments) === 0;
|
|
let shouldEmitInterveningComments = mayEmitInterveningComments;
|
|
if (shouldWriteLeadingLineTerminator(parentNode, children, format)) {
|
|
writeLine();
|
|
shouldEmitInterveningComments = false;
|
|
}
|
|
else if (format & ListFormat.SpaceBetweenBraces) {
|
|
write(" ");
|
|
}
|
|
|
|
// Increase the indent, if requested.
|
|
if (format & ListFormat.Indented) {
|
|
increaseIndent();
|
|
}
|
|
|
|
// Emit each child.
|
|
let previousSibling: Node;
|
|
let shouldDecreaseIndentAfterEmit: boolean;
|
|
const delimiter = getDelimiter(format);
|
|
for (let i = 0; i < count; i++) {
|
|
const child = children[start + i];
|
|
|
|
// Write the delimiter if this is not the first node.
|
|
if (previousSibling) {
|
|
write(delimiter);
|
|
|
|
// Write either a line terminator or whitespace to separate the elements.
|
|
if (shouldWriteSeparatingLineTerminator(previousSibling, child, format)) {
|
|
// If a synthesized node in a single-line list starts on a new
|
|
// line, we should increase the indent.
|
|
if ((format & (ListFormat.LinesMask | ListFormat.Indented)) === ListFormat.SingleLine) {
|
|
increaseIndent();
|
|
shouldDecreaseIndentAfterEmit = true;
|
|
}
|
|
|
|
writeLine();
|
|
shouldEmitInterveningComments = false;
|
|
}
|
|
else if (previousSibling && format & ListFormat.SpaceBetweenSiblings) {
|
|
write(" ");
|
|
}
|
|
}
|
|
|
|
if (shouldEmitInterveningComments) {
|
|
const commentRange = child.commentRange || child;
|
|
emitTrailingCommentsOfPosition(commentRange.pos);
|
|
}
|
|
else {
|
|
shouldEmitInterveningComments = mayEmitInterveningComments;
|
|
}
|
|
|
|
// Emit this child.
|
|
emit(child);
|
|
|
|
if (shouldDecreaseIndentAfterEmit) {
|
|
decreaseIndent();
|
|
shouldDecreaseIndentAfterEmit = false;
|
|
}
|
|
|
|
previousSibling = child;
|
|
}
|
|
|
|
// Write a trailing comma, if requested.
|
|
const hasTrailingComma = (format & ListFormat.AllowTrailingComma) && children.hasTrailingComma;
|
|
if (format & ListFormat.CommaDelimited && hasTrailingComma) {
|
|
write(",");
|
|
}
|
|
|
|
// Decrease the indent, if requested.
|
|
if (format & ListFormat.Indented) {
|
|
decreaseIndent();
|
|
}
|
|
|
|
// Write the closing line terminator or closing whitespace.
|
|
if (shouldWriteClosingLineTerminator(parentNode, children, format)) {
|
|
writeLine();
|
|
}
|
|
else if (format & ListFormat.SpaceBetweenBraces) {
|
|
write(" ");
|
|
}
|
|
}
|
|
|
|
if (format & ListFormat.BracketsMask) {
|
|
write(getClosingBracket(format));
|
|
}
|
|
}
|
|
|
|
function writeIfAny(nodes: NodeArray<Node>, text: string) {
|
|
if (nodes && nodes.length > 0) {
|
|
write(text);
|
|
}
|
|
}
|
|
|
|
function writeIfPresent(node: Node, text: string) {
|
|
if (node !== undefined) {
|
|
write(text);
|
|
}
|
|
}
|
|
|
|
function writeToken(token: SyntaxKind, pos: number, contextNode?: Node) {
|
|
const tokenStartPos = emitTokenStart(token, pos, contextNode, shouldSkipLeadingSourceMapForToken, getTokenSourceMapRange);
|
|
const tokenEndPos = writeTokenText(token, tokenStartPos);
|
|
return emitTokenEnd(token, tokenEndPos, contextNode, shouldSkipTrailingSourceMapForToken, getTokenSourceMapRange);
|
|
}
|
|
|
|
function shouldSkipLeadingSourceMapForToken(contextNode: Node) {
|
|
return (contextNode.emitFlags & NodeEmitFlags.NoTokenLeadingSourceMaps) !== 0;
|
|
}
|
|
|
|
function shouldSkipTrailingSourceMapForToken(contextNode: Node) {
|
|
return (contextNode.emitFlags & NodeEmitFlags.NoTokenTrailingSourceMaps) !== 0;
|
|
}
|
|
|
|
function writeTokenText(token: SyntaxKind, pos?: number) {
|
|
const tokenString = tokenToString(token);
|
|
write(tokenString);
|
|
return positionIsSynthesized(pos) ? -1 : pos + tokenString.length;
|
|
}
|
|
|
|
function writeTokenNode(node: Node) {
|
|
if (node) {
|
|
emitStart(/*range*/ node, /*contextNode*/ node, shouldSkipLeadingSourceMapForNode, shouldSkipSourceMapForChildren, getSourceMapRange);
|
|
writeTokenText(node.kind);
|
|
emitEnd(/*range*/ node, /*contextNode*/ node, shouldSkipTrailingSourceMapForNode, shouldSkipSourceMapForChildren, getSourceMapRange);
|
|
}
|
|
}
|
|
|
|
function increaseIndentIf(value: boolean, valueToWriteWhenNotIndenting?: string) {
|
|
if (value) {
|
|
increaseIndent();
|
|
writeLine();
|
|
}
|
|
else if (valueToWriteWhenNotIndenting) {
|
|
write(valueToWriteWhenNotIndenting);
|
|
}
|
|
}
|
|
|
|
// Helper function to decrease the indent if we previously indented. Allows multiple
|
|
// previous indent values to be considered at a time. This also allows caller to just
|
|
// call this once, passing in all their appropriate indent values, instead of needing
|
|
// to call this helper function multiple times.
|
|
function decreaseIndentIf(value1: boolean, value2?: boolean) {
|
|
if (value1) {
|
|
decreaseIndent();
|
|
}
|
|
if (value2) {
|
|
decreaseIndent();
|
|
}
|
|
}
|
|
|
|
function shouldWriteLeadingLineTerminator(parentNode: Node, children: NodeArray<Node>, format: ListFormat) {
|
|
if (format & ListFormat.MultiLine) {
|
|
return true;
|
|
}
|
|
|
|
if (format & ListFormat.PreserveLines) {
|
|
if (format & ListFormat.PreferNewLine) {
|
|
return true;
|
|
}
|
|
|
|
const firstChild = children[0];
|
|
if (firstChild === undefined) {
|
|
return !rangeIsOnSingleLine(parentNode, currentSourceFile);
|
|
}
|
|
else if (positionIsSynthesized(parentNode.pos) || nodeIsSynthesized(firstChild)) {
|
|
return synthesizedNodeStartsOnNewLine(firstChild, format);
|
|
}
|
|
else {
|
|
return !rangeStartPositionsAreOnSameLine(parentNode, firstChild, currentSourceFile);
|
|
}
|
|
}
|
|
else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
function shouldWriteSeparatingLineTerminator(previousNode: Node, nextNode: Node, format: ListFormat) {
|
|
if (format & ListFormat.MultiLine) {
|
|
return true;
|
|
}
|
|
else if (format & ListFormat.PreserveLines) {
|
|
if (previousNode === undefined || nextNode === undefined) {
|
|
return false;
|
|
}
|
|
else if (nodeIsSynthesized(previousNode) || nodeIsSynthesized(nextNode)) {
|
|
return synthesizedNodeStartsOnNewLine(previousNode, format) || synthesizedNodeStartsOnNewLine(nextNode, format);
|
|
}
|
|
else {
|
|
return !rangeEndIsOnSameLineAsRangeStart(previousNode, nextNode, currentSourceFile);
|
|
}
|
|
}
|
|
else {
|
|
return nextNode.startsOnNewLine;
|
|
}
|
|
}
|
|
|
|
function shouldWriteClosingLineTerminator(parentNode: Node, children: NodeArray<Node>, format: ListFormat) {
|
|
if (format & ListFormat.MultiLine) {
|
|
return (format & ListFormat.NoTrailingNewLine) === 0;
|
|
}
|
|
else if (format & ListFormat.PreserveLines) {
|
|
if (format & ListFormat.PreferNewLine) {
|
|
return true;
|
|
}
|
|
|
|
const lastChild = lastOrUndefined(children);
|
|
if (lastChild === undefined) {
|
|
return !rangeIsOnSingleLine(parentNode, currentSourceFile);
|
|
}
|
|
else if (positionIsSynthesized(parentNode.pos) || nodeIsSynthesized(lastChild)) {
|
|
return synthesizedNodeStartsOnNewLine(lastChild, format);
|
|
}
|
|
else {
|
|
return !rangeEndPositionsAreOnSameLine(parentNode, lastChild, currentSourceFile);
|
|
}
|
|
}
|
|
else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
function synthesizedNodeStartsOnNewLine(node: Node, format?: ListFormat) {
|
|
if (nodeIsSynthesized(node)) {
|
|
const startsOnNewLine = node.startsOnNewLine;
|
|
if (startsOnNewLine === undefined) {
|
|
return (format & ListFormat.PreferNewLine) !== 0;
|
|
}
|
|
|
|
return startsOnNewLine;
|
|
}
|
|
|
|
return (format & ListFormat.PreferNewLine) !== 0;
|
|
}
|
|
|
|
function needsIndentation(parent: Node, node1: Node, node2: Node): boolean {
|
|
parent = skipSynthesizedParentheses(parent);
|
|
node1 = skipSynthesizedParentheses(node1);
|
|
node2 = skipSynthesizedParentheses(node2);
|
|
|
|
// Always use a newline for synthesized code if the synthesizer desires it.
|
|
if (node2.startsOnNewLine) {
|
|
return true;
|
|
}
|
|
|
|
return !nodeIsSynthesized(parent)
|
|
&& !nodeIsSynthesized(node1)
|
|
&& !nodeIsSynthesized(node2)
|
|
&& !rangeEndIsOnSameLineAsRangeStart(node1, node2, currentSourceFile);
|
|
}
|
|
|
|
function skipSynthesizedParentheses(node: Node) {
|
|
while (node.kind === SyntaxKind.ParenthesizedExpression && nodeIsSynthesized(node)) {
|
|
node = (<ParenthesizedExpression>node).expression;
|
|
}
|
|
|
|
return node;
|
|
}
|
|
|
|
function getTextOfNode(node: Node, includeTrivia?: boolean): string {
|
|
if (isGeneratedIdentifier(node)) {
|
|
return getGeneratedIdentifier(<Identifier>node);
|
|
}
|
|
else if (isIdentifier(node) && (nodeIsSynthesized(node) || !node.parent)) {
|
|
return unescapeIdentifier(node.text);
|
|
}
|
|
else if (node.kind === SyntaxKind.StringLiteral && (<StringLiteral>node).textSourceNode) {
|
|
return getTextOfNode((<StringLiteral>node).textSourceNode, includeTrivia);
|
|
}
|
|
else if (isLiteralExpression(node) && (nodeIsSynthesized(node) || !node.parent)) {
|
|
return node.text;
|
|
}
|
|
|
|
return getSourceTextOfNodeFromSourceFile(currentSourceFile, node, includeTrivia);
|
|
}
|
|
|
|
function getLiteralTextOfNode(node: LiteralLikeNode): string {
|
|
if (node.kind === SyntaxKind.StringLiteral && (<StringLiteral>node).textSourceNode) {
|
|
const textSourceNode = (<StringLiteral>node).textSourceNode;
|
|
if (isIdentifier(textSourceNode)) {
|
|
return "\"" + escapeNonAsciiCharacters(escapeString(getTextOfNode(textSourceNode))) + "\"";
|
|
}
|
|
else {
|
|
return getLiteralTextOfNode(textSourceNode);
|
|
}
|
|
}
|
|
|
|
return getLiteralText(node, currentSourceFile, languageVersion);
|
|
}
|
|
|
|
function tryGetConstEnumValue(node: Node): number {
|
|
if (compilerOptions.isolatedModules) {
|
|
return undefined;
|
|
}
|
|
|
|
return isPropertyAccessExpression(node) || isElementAccessExpression(node)
|
|
? resolver.getConstantValue(<PropertyAccessExpression | ElementAccessExpression>node)
|
|
: undefined;
|
|
}
|
|
|
|
function isSingleLineEmptyBlock(block: Block) {
|
|
return !block.multiLine
|
|
&& block.statements.length === 0
|
|
&& rangeEndIsOnSameLineAsRangeStart(block, block, currentSourceFile);
|
|
}
|
|
|
|
function isUniqueName(name: string): boolean {
|
|
return !resolver.hasGlobalName(name) &&
|
|
!hasProperty(currentFileIdentifiers, name) &&
|
|
!hasProperty(generatedNameSet, name);
|
|
}
|
|
|
|
function isUniqueLocalName(name: string, container: Node): boolean {
|
|
for (let node = container; isNodeDescendantOf(node, container); node = node.nextContainer) {
|
|
if (node.locals && hasProperty(node.locals, name)) {
|
|
// We conservatively include alias symbols to cover cases where they're emitted as locals
|
|
if (node.locals[name].flags & (SymbolFlags.Value | SymbolFlags.ExportValue | SymbolFlags.Alias)) {
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Return the next available name in the pattern _a ... _z, _0, _1, ...
|
|
* TempFlags._i or TempFlags._n may be used to express a preference for that dedicated name.
|
|
* Note that names generated by makeTempVariableName and makeUniqueName will never conflict.
|
|
*/
|
|
function makeTempVariableName(flags: TempFlags): string {
|
|
if (flags && !(tempFlags & flags)) {
|
|
const name = flags === TempFlags._i ? "_i" : "_n";
|
|
if (isUniqueName(name)) {
|
|
tempFlags |= flags;
|
|
return name;
|
|
}
|
|
}
|
|
while (true) {
|
|
const count = tempFlags & TempFlags.CountMask;
|
|
tempFlags++;
|
|
// Skip over 'i' and 'n'
|
|
if (count !== 8 && count !== 13) {
|
|
const name = count < 26
|
|
? "_" + String.fromCharCode(CharacterCodes.a + count)
|
|
: "_" + (count - 26);
|
|
if (isUniqueName(name)) {
|
|
return name;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Generate a name that is unique within the current file and doesn't conflict with any names
|
|
// in global scope. The name is formed by adding an '_n' suffix to the specified base name,
|
|
// where n is a positive integer. Note that names generated by makeTempVariableName and
|
|
// makeUniqueName are guaranteed to never conflict.
|
|
function makeUniqueName(baseName: string): string {
|
|
// Find the first unique 'name_n', where n is a positive number
|
|
if (baseName.charCodeAt(baseName.length - 1) !== CharacterCodes._) {
|
|
baseName += "_";
|
|
}
|
|
let i = 1;
|
|
while (true) {
|
|
const generatedName = baseName + i;
|
|
if (isUniqueName(generatedName)) {
|
|
return generatedNameSet[generatedName] = generatedName;
|
|
}
|
|
i++;
|
|
}
|
|
}
|
|
|
|
function generateNameForModuleOrEnum(node: ModuleDeclaration | EnumDeclaration) {
|
|
const name = getTextOfNode(node.name);
|
|
// Use module/enum name itself if it is unique, otherwise make a unique variation
|
|
return isUniqueLocalName(name, node) ? name : makeUniqueName(name);
|
|
}
|
|
|
|
function generateNameForImportOrExportDeclaration(node: ImportDeclaration | ExportDeclaration) {
|
|
const expr = getExternalModuleName(node);
|
|
const baseName = expr.kind === SyntaxKind.StringLiteral ?
|
|
escapeIdentifier(makeIdentifierFromModuleName((<LiteralExpression>expr).text)) : "module";
|
|
return makeUniqueName(baseName);
|
|
}
|
|
|
|
function generateNameForExportDefault() {
|
|
return makeUniqueName("default");
|
|
}
|
|
|
|
function generateNameForClassExpression() {
|
|
return makeUniqueName("class");
|
|
}
|
|
|
|
/**
|
|
* Generates a unique name from a node.
|
|
*
|
|
* @param node A node.
|
|
*/
|
|
function generateNameForNode(node: Node): string {
|
|
switch (node.kind) {
|
|
case SyntaxKind.Identifier:
|
|
return makeUniqueName(getTextOfNode(node));
|
|
case SyntaxKind.ModuleDeclaration:
|
|
case SyntaxKind.EnumDeclaration:
|
|
return generateNameForModuleOrEnum(<ModuleDeclaration | EnumDeclaration>node);
|
|
case SyntaxKind.ImportDeclaration:
|
|
case SyntaxKind.ExportDeclaration:
|
|
return generateNameForImportOrExportDeclaration(<ImportDeclaration | ExportDeclaration>node);
|
|
case SyntaxKind.FunctionDeclaration:
|
|
case SyntaxKind.ClassDeclaration:
|
|
case SyntaxKind.ExportAssignment:
|
|
return generateNameForExportDefault();
|
|
case SyntaxKind.ClassExpression:
|
|
return generateNameForClassExpression();
|
|
default:
|
|
return makeTempVariableName(TempFlags.Auto);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Generates a unique identifier for a node.
|
|
*
|
|
* @param name A generated name.
|
|
*/
|
|
function generateName(name: Identifier) {
|
|
switch (name.autoGenerateKind) {
|
|
case GeneratedIdentifierKind.Auto:
|
|
return makeTempVariableName(TempFlags.Auto);
|
|
case GeneratedIdentifierKind.Loop:
|
|
return makeTempVariableName(TempFlags._i);
|
|
case GeneratedIdentifierKind.Unique:
|
|
return makeUniqueName(name.text);
|
|
}
|
|
|
|
Debug.fail("Unsupported GeneratedIdentifierKind.");
|
|
}
|
|
|
|
/**
|
|
* Gets the node from which a name should be generated.
|
|
*
|
|
* @param name A generated name wrapper.
|
|
*/
|
|
function getNodeForGeneratedName(name: Identifier) {
|
|
const autoGenerateId = name.autoGenerateId;
|
|
let node = name as Node;
|
|
let original = node.original;
|
|
while (original) {
|
|
node = original;
|
|
|
|
// if "node" is a different generated name (having a different
|
|
// "autoGenerateId"), use it and stop traversing.
|
|
if (isIdentifier(node)
|
|
&& node.autoGenerateKind === GeneratedIdentifierKind.Node
|
|
&& node.autoGenerateId !== autoGenerateId) {
|
|
break;
|
|
}
|
|
|
|
original = node.original;
|
|
}
|
|
|
|
// otherwise, return the original node for the source;
|
|
return node;
|
|
}
|
|
|
|
/**
|
|
* Gets the generated identifier text from a generated identifier.
|
|
*
|
|
* @param name The generated identifier.
|
|
*/
|
|
function getGeneratedIdentifier(name: Identifier) {
|
|
if (name.autoGenerateKind === GeneratedIdentifierKind.Node) {
|
|
// Generated names generate unique names based on their original node
|
|
// and are cached based on that node's id
|
|
const node = getNodeForGeneratedName(name);
|
|
const nodeId = getNodeId(node);
|
|
return nodeIdToGeneratedName[nodeId] || (nodeIdToGeneratedName[nodeId] = unescapeIdentifier(generateNameForNode(node)));
|
|
}
|
|
else {
|
|
// Auto, Loop, and Unique names are cached based on their unique
|
|
// autoGenerateId.
|
|
const autoGenerateId = name.autoGenerateId;
|
|
return autoGeneratedIdToGeneratedName[autoGenerateId] || (autoGeneratedIdToGeneratedName[autoGenerateId] = unescapeIdentifier(generateName(name)));
|
|
}
|
|
}
|
|
|
|
function createDelimiterMap() {
|
|
const delimiters: string[] = [];
|
|
delimiters[ListFormat.None] = "";
|
|
delimiters[ListFormat.CommaDelimited] = ",";
|
|
delimiters[ListFormat.BarDelimited] = " |";
|
|
delimiters[ListFormat.AmpersandDelimited] = " &";
|
|
return delimiters;
|
|
}
|
|
|
|
function getDelimiter(format: ListFormat) {
|
|
return delimiters[format & ListFormat.DelimitersMask];
|
|
}
|
|
|
|
function createBracketsMap() {
|
|
const brackets: string[][] = [];
|
|
brackets[ListFormat.Braces] = ["{", "}"];
|
|
brackets[ListFormat.Parenthesis] = ["(", ")"];
|
|
brackets[ListFormat.AngleBrackets] = ["<", ">"];
|
|
brackets[ListFormat.SquareBrackets] = ["[", "]"];
|
|
return brackets;
|
|
}
|
|
|
|
function getOpeningBracket(format: ListFormat) {
|
|
return brackets[format & ListFormat.BracketsMask][0];
|
|
}
|
|
|
|
function getClosingBracket(format: ListFormat) {
|
|
return brackets[format & ListFormat.BracketsMask][1];
|
|
}
|
|
}
|
|
|
|
const enum ListFormat {
|
|
None = 0,
|
|
|
|
// Line separators
|
|
SingleLine = 0, // Prints the list on a single line (default).
|
|
MultiLine = 1 << 0, // Prints the list on multiple lines.
|
|
PreserveLines = 1 << 1, // Prints the list using line preservation if possible.
|
|
LinesMask = SingleLine | MultiLine | PreserveLines,
|
|
|
|
// Delimiters
|
|
NotDelimited = 0, // There is no delimiter between list items (default).
|
|
BarDelimited = 1 << 2, // Each list item is space-and-bar (" |") delimited.
|
|
AmpersandDelimited = 1 << 3, // Each list item is space-and-ampersand (" &") delimited.
|
|
CommaDelimited = 1 << 4, // Each list item is comma (",") delimited.
|
|
DelimitersMask = BarDelimited | AmpersandDelimited | CommaDelimited,
|
|
|
|
AllowTrailingComma = 1 << 5, // Write a trailing comma (",") if present.
|
|
|
|
// Whitespace
|
|
Indented = 1 << 6, // The list should be indented.
|
|
SpaceBetweenBraces = 1 << 7, // Inserts a space after the opening brace and before the closing brace.
|
|
SpaceBetweenSiblings = 1 << 8, // Inserts a space between each sibling node.
|
|
|
|
// Brackets/Braces
|
|
Braces = 1 << 9, // The list is surrounded by "{" and "}".
|
|
Parenthesis = 1 << 10, // The list is surrounded by "(" and ")".
|
|
AngleBrackets = 1 << 11, // The list is surrounded by "<" and ">".
|
|
SquareBrackets = 1 << 12, // The list is surrounded by "[" and "]".
|
|
BracketsMask = Braces | Parenthesis | AngleBrackets | SquareBrackets,
|
|
|
|
OptionalIfUndefined = 1 << 13, // Do not emit brackets if the list is undefined.
|
|
OptionalIfEmpty = 1 << 14, // Do not emit brackets if the list is empty.
|
|
Optional = OptionalIfUndefined | OptionalIfEmpty,
|
|
|
|
// Other
|
|
PreferNewLine = 1 << 15, // Prefer adding a LineTerminator between synthesized nodes.
|
|
NoTrailingNewLine = 1 << 16, // Do not emit a trailing NewLine for a MultiLine list.
|
|
NoInterveningComments = 1 << 17, // Do not emit comments between each node
|
|
|
|
// Precomputed Formats
|
|
Modifiers = SingleLine | SpaceBetweenSiblings,
|
|
HeritageClauses = SingleLine | SpaceBetweenSiblings,
|
|
TypeLiteralMembers = MultiLine | Indented,
|
|
TupleTypeElements = CommaDelimited | SpaceBetweenSiblings | SingleLine | Indented,
|
|
UnionTypeConstituents = BarDelimited | SpaceBetweenSiblings | SingleLine,
|
|
IntersectionTypeConstituents = AmpersandDelimited | SpaceBetweenSiblings | SingleLine,
|
|
ObjectBindingPatternElements = SingleLine | AllowTrailingComma | SpaceBetweenBraces | CommaDelimited | SpaceBetweenSiblings,
|
|
ArrayBindingPatternElements = SingleLine | AllowTrailingComma | CommaDelimited | SpaceBetweenSiblings,
|
|
ObjectLiteralExpressionProperties = PreserveLines | CommaDelimited | SpaceBetweenSiblings | SpaceBetweenBraces | Indented | Braces,
|
|
ArrayLiteralExpressionElements = PreserveLines | CommaDelimited | SpaceBetweenSiblings | AllowTrailingComma | Indented | SquareBrackets,
|
|
CallExpressionArguments = CommaDelimited | SpaceBetweenSiblings | SingleLine | Parenthesis,
|
|
NewExpressionArguments = CommaDelimited | SpaceBetweenSiblings | SingleLine | Parenthesis | OptionalIfUndefined,
|
|
TemplateExpressionSpans = SingleLine | NoInterveningComments,
|
|
SingleLineBlockStatements = SpaceBetweenBraces | SpaceBetweenSiblings | SingleLine,
|
|
MultiLineBlockStatements = Indented | MultiLine,
|
|
VariableDeclarationList = CommaDelimited | SpaceBetweenSiblings | SingleLine,
|
|
SingleLineFunctionBodyStatements = SingleLine | SpaceBetweenSiblings | SpaceBetweenBraces,
|
|
MultiLineFunctionBodyStatements = MultiLine,
|
|
ClassHeritageClauses = SingleLine | SpaceBetweenSiblings,
|
|
ClassMembers = Indented | MultiLine,
|
|
InterfaceMembers = Indented | MultiLine,
|
|
EnumMembers = CommaDelimited | Indented | MultiLine,
|
|
CaseBlockClauses = Indented | MultiLine,
|
|
NamedImportsOrExportsElements = CommaDelimited | SpaceBetweenSiblings | AllowTrailingComma | SingleLine | SpaceBetweenBraces,
|
|
JsxElementChildren = SingleLine | NoInterveningComments,
|
|
JsxElementAttributes = SingleLine | SpaceBetweenSiblings | NoInterveningComments,
|
|
CaseOrDefaultClauseStatements = Indented | MultiLine | NoTrailingNewLine | OptionalIfEmpty,
|
|
HeritageClauseTypes = CommaDelimited | SpaceBetweenSiblings | SingleLine,
|
|
SourceFileStatements = MultiLine | NoTrailingNewLine,
|
|
Decorators = MultiLine | Optional,
|
|
TypeArguments = CommaDelimited | SpaceBetweenSiblings | SingleLine | Indented | AngleBrackets | Optional,
|
|
TypeParameters = CommaDelimited | SpaceBetweenSiblings | SingleLine | Indented | AngleBrackets | Optional,
|
|
Parameters = CommaDelimited | SpaceBetweenSiblings | SingleLine | Indented | Parenthesis,
|
|
IndexSignatureParameters = CommaDelimited | SpaceBetweenSiblings | SingleLine | Indented | SquareBrackets,
|
|
}
|
|
}
|