80 lines
2.4 KiB
JavaScript
80 lines
2.4 KiB
JavaScript
//// [bestCommonTypeOfConditionalExpressions.ts]
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// conditional expressions return the best common type of the branches plus contextual type (using the first candidate if multiple BCTs exist)
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// no errors expected here
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var a: { x: number; y?: number };
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var b: { x: number; z?: number };
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class Base { foo: string; }
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class Derived extends Base { bar: string; }
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class Derived2 extends Base { baz: string; }
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var base: Base;
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var derived: Derived;
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var derived2: Derived2;
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var r = true ? 1 : 2;
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var r3 = true ? 1 : {};
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var r4 = true ? a : b; // typeof a
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var r5 = true ? b : a; // typeof b
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var r6 = true ? (x: number) => { } : (x: Object) => { }; // returns number => void
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var r7: (x: Object) => void = true ? (x: number) => { } : (x: Object) => { };
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var r8 = true ? (x: Object) => { } : (x: number) => { }; // returns Object => void
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var r10: Base = true ? derived : derived2; // no error since we use the contextual type in BCT
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var r11 = true ? base : derived2;
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function foo5<T, U>(t: T, u: U): Object {
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return true ? t : u; // BCT is Object
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}
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//// [bestCommonTypeOfConditionalExpressions.js]
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var __extends = 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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__.prototype = b.prototype;
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d.prototype = new __();
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};
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// conditional expressions return the best common type of the branches plus contextual type (using the first candidate if multiple BCTs exist)
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// no errors expected here
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var a;
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var b;
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var Base = (function () {
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function Base() {
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}
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return Base;
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})();
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var Derived = (function (_super) {
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__extends(Derived, _super);
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function Derived() {
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_super.apply(this, arguments);
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}
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return Derived;
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})(Base);
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var Derived2 = (function (_super) {
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__extends(Derived2, _super);
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function Derived2() {
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_super.apply(this, arguments);
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}
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return Derived2;
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})(Base);
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var base;
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var derived;
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var derived2;
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var r = true ? 1 : 2;
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var r3 = true ? 1 : {};
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var r4 = true ? a : b; // typeof a
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var r5 = true ? b : a; // typeof b
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var r6 = true ? function (x) {
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} : function (x) {
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}; // returns number => void
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var r7 = true ? function (x) {
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} : function (x) {
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};
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var r8 = true ? function (x) {
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} : function (x) {
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}; // returns Object => void
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var r10 = true ? derived : derived2; // no error since we use the contextual type in BCT
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var r11 = true ? base : derived2;
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function foo5(t, u) {
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return true ? t : u;
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}
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