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Minor cleanup and some related tests
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@rbuckton
rbuckton committed Feb 5, 2018
1 parent c4d7e48 commit 0bf0bf6
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10 changes: 3 additions & 7 deletions src/lib/es5.d.ts
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Expand Up @@ -1273,17 +1273,13 @@ declare type PropertyDecorator = (target: Object, propertyKey: string | symbol)
declare type MethodDecorator = <T>(target: Object, propertyKey: string | symbol, descriptor: TypedPropertyDescriptor<T>) => TypedPropertyDescriptor<T> | void;
declare type ParameterDecorator = (target: Object, propertyKey: string | symbol, parameterIndex: number) => void;

/** An object type that can be definitely be awaited. Do not inherit from this type. */
/** An object type that can definitely be awaited. Do not inherit from this type. */
declare type Awaitable<T> = { then(onfulfilled: (value: T) => any): any; };

/** An object type that may not be awaitable. Do not inherit from this type. */
declare type NonAwaitable = { then(...args: any[]): any; };

/** Gets the type resulting from awaiting `T`. This does **not** recursively unwrap nested promises. */
/** Gets the resulting type from awaiting `T`. This does **not** recursively unwrap nested promises. */
declare type Awaited<T> =
T extends Awaitable<Awaitable<infer U>> ? U :
T extends Awaitable<infer U> ? U :
T extends NonAwaitable ? never :
T extends { then(...args: any[]): any; } ? never :
T;

declare type PromiseConstructorLike = new <T>(executor: (resolve: (value?: T | Awaitable<T>) => void, reject: (reason?: any) => void) => void) => PromiseLike<T>;
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44 changes: 44 additions & 0 deletions tests/baselines/reference/awaitedOfT.js
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//// [awaitedOfT.ts]
type T1 = Awaited<number>; // number (same as 'await')
type T2 = Awaited<Promise<number>>; // number (same as 'await')
type T3 = Awaited<Promise<Promise<number>>>; // number (same as 'await')
type T4 = Awaited<Promise<Promise<Promise<number>>>>; // number (same as 'await')
type T5 = Awaited<PromiseLike<number>>; // number (same as 'await')
type T6 = Awaited<PromiseLike<PromiseLike<number>>>; // number (same as 'await')
type T7 = Awaited<PromiseLike<PromiseLike<PromiseLike<number>>>>; // number (same as 'await')
type T8 = Awaited<Promise<PromiseLike<number>>>; // number (same as 'await')
type T9 = Awaited<PromiseLike<Promise<number>>>; // number (same as 'await')
type T10 = Awaited<{ then: any; }>; // never (no way to know what this might resolve to, differs from 'await')
type T11 = Awaited<{ then: number; }>; // { then: number; } (same as 'await')
type T12 = Awaited<{ then(): void; }>; // never (no way to know what this might resolve to, error for 'await')
type T13 = Awaited<{ then(x: any): void; }>; // never (no way to know what this might resolve to, error for 'await')
type T14 = Awaited<{ then(x: number): void; }>; // never (cannot be resolved correctly, error for 'await')
type T15 = Awaited<{ then(x: () => void): void; }>; // never (no way to know what this might resolve to)
type T16 = Awaited<{ then(x: (y: any) => void): void; }>; // any (same as 'await')
type T17 = Awaited<{ then(x: (y: number) => void): void; }>; // number (same as 'await')
type T18 = Awaited<{ then(x: (y: { then: any; }) => void): void; }>; // { then: any; } (no recursive unwrap, differs from 'await')
type T19 = Awaited<{ then(x: (y: { then: number; }) => void): void; }>; // { then: number; } (no recursive unwrap, differs from 'await')
type T20 = Awaited<{ then(x: (y: { then(): void; }) => void): void; }>; // { then(): void; } (no recursive unwrap, differs from 'await')
type T21 = Awaited<{ then(x: (y: { then(x: any): void; }) => void): void; }>; // { then(x: any): void; } (no recursive unwrap, differs from 'await')
type T22 = Awaited<{ then(x: (y: { then(x: number): void; }) => void): void; }>; // { then(x: number): void; } (no recursive unwrap, differs from 'await')
type T23 = Awaited<{ then(x: (y: { then(x: () => void): void; }) => void): void; }>; // { then(x: () => void): void; } (no recursive unwrap, differs from 'await')
type T24 = Awaited<{ then(x: (y: { then(x: (y: any) => void): void; }) => void): void; }>; // { then(x: (y: any) => void): void; } (no recursive unwrap, differs from 'await')
type T25 = Awaited<{ then(x: (y: { then(x: (y: number) => void): void; }) => void): void; }>; // { then(x: (y: number) => void): void; } (no recursive unwrap, differs from 'await')

// self recursive bad promise
type T26 = Awaited<BadPromise>; // BadPromise (no recursive unwrap, differs from 'await')
interface BadPromise { then(cb: (value: BadPromise) => void): any; }

// mutually recursive bad promises
type T27 = Awaited<BadPromiseA>; // BadPromiseB (no recursive unwrap, differs from 'await')
interface BadPromiseA { then(cb: (value: BadPromiseB) => void): any; }
interface BadPromiseB { then(cb: (value: BadPromiseA) => void): any; }

type T28 = Awaited<never>; // never (same as 'await')
type T29 = Awaited<number | Promise<string>>; // string | number (same as 'await')
type T30 = Awaited<number | Promise<never>>; // number (same as 'await')
type T31 = Awaited<PromiseLike<number> | Promise<string>>; // string | number (same as 'await')
type T32 = Awaited<Awaited<number>>; // number (same as 'await')
type T33 = Awaited<Promise<Awaited<Promise<number>>>>; // number (same as 'await')

//// [awaitedOfT.js]
236 changes: 236 additions & 0 deletions tests/baselines/reference/awaitedOfT.symbols
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=== tests/cases/compiler/awaitedOfT.ts ===
type T1 = Awaited<number>; // number (same as 'await')
>T1 : Symbol(T1, Decl(awaitedOfT.ts, 0, 0))
>Awaited : Symbol(Awaited, Decl(lib.es5.d.ts, --, --))

type T2 = Awaited<Promise<number>>; // number (same as 'await')
>T2 : Symbol(T2, Decl(awaitedOfT.ts, 0, 26))
>Awaited : Symbol(Awaited, Decl(lib.es5.d.ts, --, --))
>Promise : Symbol(Promise, Decl(lib.es5.d.ts, --, --), Decl(lib.es2015.symbol.wellknown.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --), Decl(lib.es2015.promise.d.ts, --, --))

type T3 = Awaited<Promise<Promise<number>>>; // number (same as 'await')
>T3 : Symbol(T3, Decl(awaitedOfT.ts, 1, 35))
>Awaited : Symbol(Awaited, Decl(lib.es5.d.ts, --, --))
>Promise : Symbol(Promise, Decl(lib.es5.d.ts, --, --), Decl(lib.es2015.symbol.wellknown.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --), Decl(lib.es2015.promise.d.ts, --, --))
>Promise : Symbol(Promise, Decl(lib.es5.d.ts, --, --), Decl(lib.es2015.symbol.wellknown.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --), Decl(lib.es2015.promise.d.ts, --, --))

type T4 = Awaited<Promise<Promise<Promise<number>>>>; // number (same as 'await')
>T4 : Symbol(T4, Decl(awaitedOfT.ts, 2, 44))
>Awaited : Symbol(Awaited, Decl(lib.es5.d.ts, --, --))
>Promise : Symbol(Promise, Decl(lib.es5.d.ts, --, --), Decl(lib.es2015.symbol.wellknown.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --), Decl(lib.es2015.promise.d.ts, --, --))
>Promise : Symbol(Promise, Decl(lib.es5.d.ts, --, --), Decl(lib.es2015.symbol.wellknown.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --), Decl(lib.es2015.promise.d.ts, --, --))
>Promise : Symbol(Promise, Decl(lib.es5.d.ts, --, --), Decl(lib.es2015.symbol.wellknown.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --), Decl(lib.es2015.promise.d.ts, --, --))

type T5 = Awaited<PromiseLike<number>>; // number (same as 'await')
>T5 : Symbol(T5, Decl(awaitedOfT.ts, 3, 53))
>Awaited : Symbol(Awaited, Decl(lib.es5.d.ts, --, --))
>PromiseLike : Symbol(PromiseLike, Decl(lib.es5.d.ts, --, --))

type T6 = Awaited<PromiseLike<PromiseLike<number>>>; // number (same as 'await')
>T6 : Symbol(T6, Decl(awaitedOfT.ts, 4, 39))
>Awaited : Symbol(Awaited, Decl(lib.es5.d.ts, --, --))
>PromiseLike : Symbol(PromiseLike, Decl(lib.es5.d.ts, --, --))
>PromiseLike : Symbol(PromiseLike, Decl(lib.es5.d.ts, --, --))

type T7 = Awaited<PromiseLike<PromiseLike<PromiseLike<number>>>>; // number (same as 'await')
>T7 : Symbol(T7, Decl(awaitedOfT.ts, 5, 52))
>Awaited : Symbol(Awaited, Decl(lib.es5.d.ts, --, --))
>PromiseLike : Symbol(PromiseLike, Decl(lib.es5.d.ts, --, --))
>PromiseLike : Symbol(PromiseLike, Decl(lib.es5.d.ts, --, --))
>PromiseLike : Symbol(PromiseLike, Decl(lib.es5.d.ts, --, --))

type T8 = Awaited<Promise<PromiseLike<number>>>; // number (same as 'await')
>T8 : Symbol(T8, Decl(awaitedOfT.ts, 6, 65))
>Awaited : Symbol(Awaited, Decl(lib.es5.d.ts, --, --))
>Promise : Symbol(Promise, Decl(lib.es5.d.ts, --, --), Decl(lib.es2015.symbol.wellknown.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --), Decl(lib.es2015.promise.d.ts, --, --))
>PromiseLike : Symbol(PromiseLike, Decl(lib.es5.d.ts, --, --))

type T9 = Awaited<PromiseLike<Promise<number>>>; // number (same as 'await')
>T9 : Symbol(T9, Decl(awaitedOfT.ts, 7, 48))
>Awaited : Symbol(Awaited, Decl(lib.es5.d.ts, --, --))
>PromiseLike : Symbol(PromiseLike, Decl(lib.es5.d.ts, --, --))
>Promise : Symbol(Promise, Decl(lib.es5.d.ts, --, --), Decl(lib.es2015.symbol.wellknown.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --), Decl(lib.es2015.promise.d.ts, --, --))

type T10 = Awaited<{ then: any; }>; // never (no way to know what this might resolve to, differs from 'await')
>T10 : Symbol(T10, Decl(awaitedOfT.ts, 8, 48))
>Awaited : Symbol(Awaited, Decl(lib.es5.d.ts, --, --))
>then : Symbol(then, Decl(awaitedOfT.ts, 9, 20))

type T11 = Awaited<{ then: number; }>; // { then: number; } (same as 'await')
>T11 : Symbol(T11, Decl(awaitedOfT.ts, 9, 35))
>Awaited : Symbol(Awaited, Decl(lib.es5.d.ts, --, --))
>then : Symbol(then, Decl(awaitedOfT.ts, 10, 20))

type T12 = Awaited<{ then(): void; }>; // never (no way to know what this might resolve to, error for 'await')
>T12 : Symbol(T12, Decl(awaitedOfT.ts, 10, 38))
>Awaited : Symbol(Awaited, Decl(lib.es5.d.ts, --, --))
>then : Symbol(then, Decl(awaitedOfT.ts, 11, 20))

type T13 = Awaited<{ then(x: any): void; }>; // never (no way to know what this might resolve to, error for 'await')
>T13 : Symbol(T13, Decl(awaitedOfT.ts, 11, 38))
>Awaited : Symbol(Awaited, Decl(lib.es5.d.ts, --, --))
>then : Symbol(then, Decl(awaitedOfT.ts, 12, 20))
>x : Symbol(x, Decl(awaitedOfT.ts, 12, 26))

type T14 = Awaited<{ then(x: number): void; }>; // never (cannot be resolved correctly, error for 'await')
>T14 : Symbol(T14, Decl(awaitedOfT.ts, 12, 44))
>Awaited : Symbol(Awaited, Decl(lib.es5.d.ts, --, --))
>then : Symbol(then, Decl(awaitedOfT.ts, 13, 20))
>x : Symbol(x, Decl(awaitedOfT.ts, 13, 26))

type T15 = Awaited<{ then(x: () => void): void; }>; // never (no way to know what this might resolve to)
>T15 : Symbol(T15, Decl(awaitedOfT.ts, 13, 47))
>Awaited : Symbol(Awaited, Decl(lib.es5.d.ts, --, --))
>then : Symbol(then, Decl(awaitedOfT.ts, 14, 20))
>x : Symbol(x, Decl(awaitedOfT.ts, 14, 26))

type T16 = Awaited<{ then(x: (y: any) => void): void; }>; // any (same as 'await')
>T16 : Symbol(T16, Decl(awaitedOfT.ts, 14, 51))
>Awaited : Symbol(Awaited, Decl(lib.es5.d.ts, --, --))
>then : Symbol(then, Decl(awaitedOfT.ts, 15, 20))
>x : Symbol(x, Decl(awaitedOfT.ts, 15, 26))
>y : Symbol(y, Decl(awaitedOfT.ts, 15, 30))

type T17 = Awaited<{ then(x: (y: number) => void): void; }>; // number (same as 'await')
>T17 : Symbol(T17, Decl(awaitedOfT.ts, 15, 57))
>Awaited : Symbol(Awaited, Decl(lib.es5.d.ts, --, --))
>then : Symbol(then, Decl(awaitedOfT.ts, 16, 20))
>x : Symbol(x, Decl(awaitedOfT.ts, 16, 26))
>y : Symbol(y, Decl(awaitedOfT.ts, 16, 30))

type T18 = Awaited<{ then(x: (y: { then: any; }) => void): void; }>; // { then: any; } (no recursive unwrap, differs from 'await')
>T18 : Symbol(T18, Decl(awaitedOfT.ts, 16, 60))
>Awaited : Symbol(Awaited, Decl(lib.es5.d.ts, --, --))
>then : Symbol(then, Decl(awaitedOfT.ts, 17, 20))
>x : Symbol(x, Decl(awaitedOfT.ts, 17, 26))
>y : Symbol(y, Decl(awaitedOfT.ts, 17, 30))
>then : Symbol(then, Decl(awaitedOfT.ts, 17, 34))

type T19 = Awaited<{ then(x: (y: { then: number; }) => void): void; }>; // { then: number; } (no recursive unwrap, differs from 'await')
>T19 : Symbol(T19, Decl(awaitedOfT.ts, 17, 68))
>Awaited : Symbol(Awaited, Decl(lib.es5.d.ts, --, --))
>then : Symbol(then, Decl(awaitedOfT.ts, 18, 20))
>x : Symbol(x, Decl(awaitedOfT.ts, 18, 26))
>y : Symbol(y, Decl(awaitedOfT.ts, 18, 30))
>then : Symbol(then, Decl(awaitedOfT.ts, 18, 34))

type T20 = Awaited<{ then(x: (y: { then(): void; }) => void): void; }>; // { then(): void; } (no recursive unwrap, differs from 'await')
>T20 : Symbol(T20, Decl(awaitedOfT.ts, 18, 71))
>Awaited : Symbol(Awaited, Decl(lib.es5.d.ts, --, --))
>then : Symbol(then, Decl(awaitedOfT.ts, 19, 20))
>x : Symbol(x, Decl(awaitedOfT.ts, 19, 26))
>y : Symbol(y, Decl(awaitedOfT.ts, 19, 30))
>then : Symbol(then, Decl(awaitedOfT.ts, 19, 34))

type T21 = Awaited<{ then(x: (y: { then(x: any): void; }) => void): void; }>; // { then(x: any): void; } (no recursive unwrap, differs from 'await')
>T21 : Symbol(T21, Decl(awaitedOfT.ts, 19, 71))
>Awaited : Symbol(Awaited, Decl(lib.es5.d.ts, --, --))
>then : Symbol(then, Decl(awaitedOfT.ts, 20, 20))
>x : Symbol(x, Decl(awaitedOfT.ts, 20, 26))
>y : Symbol(y, Decl(awaitedOfT.ts, 20, 30))
>then : Symbol(then, Decl(awaitedOfT.ts, 20, 34))
>x : Symbol(x, Decl(awaitedOfT.ts, 20, 40))

type T22 = Awaited<{ then(x: (y: { then(x: number): void; }) => void): void; }>; // { then(x: number): void; } (no recursive unwrap, differs from 'await')
>T22 : Symbol(T22, Decl(awaitedOfT.ts, 20, 77))
>Awaited : Symbol(Awaited, Decl(lib.es5.d.ts, --, --))
>then : Symbol(then, Decl(awaitedOfT.ts, 21, 20))
>x : Symbol(x, Decl(awaitedOfT.ts, 21, 26))
>y : Symbol(y, Decl(awaitedOfT.ts, 21, 30))
>then : Symbol(then, Decl(awaitedOfT.ts, 21, 34))
>x : Symbol(x, Decl(awaitedOfT.ts, 21, 40))

type T23 = Awaited<{ then(x: (y: { then(x: () => void): void; }) => void): void; }>; // { then(x: () => void): void; } (no recursive unwrap, differs from 'await')
>T23 : Symbol(T23, Decl(awaitedOfT.ts, 21, 80))
>Awaited : Symbol(Awaited, Decl(lib.es5.d.ts, --, --))
>then : Symbol(then, Decl(awaitedOfT.ts, 22, 20))
>x : Symbol(x, Decl(awaitedOfT.ts, 22, 26))
>y : Symbol(y, Decl(awaitedOfT.ts, 22, 30))
>then : Symbol(then, Decl(awaitedOfT.ts, 22, 34))
>x : Symbol(x, Decl(awaitedOfT.ts, 22, 40))

type T24 = Awaited<{ then(x: (y: { then(x: (y: any) => void): void; }) => void): void; }>; // { then(x: (y: any) => void): void; } (no recursive unwrap, differs from 'await')
>T24 : Symbol(T24, Decl(awaitedOfT.ts, 22, 84))
>Awaited : Symbol(Awaited, Decl(lib.es5.d.ts, --, --))
>then : Symbol(then, Decl(awaitedOfT.ts, 23, 20))
>x : Symbol(x, Decl(awaitedOfT.ts, 23, 26))
>y : Symbol(y, Decl(awaitedOfT.ts, 23, 30))
>then : Symbol(then, Decl(awaitedOfT.ts, 23, 34))
>x : Symbol(x, Decl(awaitedOfT.ts, 23, 40))
>y : Symbol(y, Decl(awaitedOfT.ts, 23, 44))

type T25 = Awaited<{ then(x: (y: { then(x: (y: number) => void): void; }) => void): void; }>; // { then(x: (y: number) => void): void; } (no recursive unwrap, differs from 'await')
>T25 : Symbol(T25, Decl(awaitedOfT.ts, 23, 90))
>Awaited : Symbol(Awaited, Decl(lib.es5.d.ts, --, --))
>then : Symbol(then, Decl(awaitedOfT.ts, 24, 20))
>x : Symbol(x, Decl(awaitedOfT.ts, 24, 26))
>y : Symbol(y, Decl(awaitedOfT.ts, 24, 30))
>then : Symbol(then, Decl(awaitedOfT.ts, 24, 34))
>x : Symbol(x, Decl(awaitedOfT.ts, 24, 40))
>y : Symbol(y, Decl(awaitedOfT.ts, 24, 44))

// self recursive bad promise
type T26 = Awaited<BadPromise>; // BadPromise (no recursive unwrap, differs from 'await')
>T26 : Symbol(T26, Decl(awaitedOfT.ts, 24, 93))
>Awaited : Symbol(Awaited, Decl(lib.es5.d.ts, --, --))
>BadPromise : Symbol(BadPromise, Decl(awaitedOfT.ts, 27, 31))

interface BadPromise { then(cb: (value: BadPromise) => void): any; }
>BadPromise : Symbol(BadPromise, Decl(awaitedOfT.ts, 27, 31))
>then : Symbol(BadPromise.then, Decl(awaitedOfT.ts, 28, 22))
>cb : Symbol(cb, Decl(awaitedOfT.ts, 28, 28))
>value : Symbol(value, Decl(awaitedOfT.ts, 28, 33))
>BadPromise : Symbol(BadPromise, Decl(awaitedOfT.ts, 27, 31))

// mutually recursive bad promises
type T27 = Awaited<BadPromiseA>; // BadPromiseB (no recursive unwrap, differs from 'await')
>T27 : Symbol(T27, Decl(awaitedOfT.ts, 28, 68))
>Awaited : Symbol(Awaited, Decl(lib.es5.d.ts, --, --))
>BadPromiseA : Symbol(BadPromiseA, Decl(awaitedOfT.ts, 31, 32))

interface BadPromiseA { then(cb: (value: BadPromiseB) => void): any; }
>BadPromiseA : Symbol(BadPromiseA, Decl(awaitedOfT.ts, 31, 32))
>then : Symbol(BadPromiseA.then, Decl(awaitedOfT.ts, 32, 23))
>cb : Symbol(cb, Decl(awaitedOfT.ts, 32, 29))
>value : Symbol(value, Decl(awaitedOfT.ts, 32, 34))
>BadPromiseB : Symbol(BadPromiseB, Decl(awaitedOfT.ts, 32, 70))

interface BadPromiseB { then(cb: (value: BadPromiseA) => void): any; }
>BadPromiseB : Symbol(BadPromiseB, Decl(awaitedOfT.ts, 32, 70))
>then : Symbol(BadPromiseB.then, Decl(awaitedOfT.ts, 33, 23))
>cb : Symbol(cb, Decl(awaitedOfT.ts, 33, 29))
>value : Symbol(value, Decl(awaitedOfT.ts, 33, 34))
>BadPromiseA : Symbol(BadPromiseA, Decl(awaitedOfT.ts, 31, 32))

type T28 = Awaited<never>; // never (same as 'await')
>T28 : Symbol(T28, Decl(awaitedOfT.ts, 33, 70))
>Awaited : Symbol(Awaited, Decl(lib.es5.d.ts, --, --))

type T29 = Awaited<number | Promise<string>>; // string | number (same as 'await')
>T29 : Symbol(T29, Decl(awaitedOfT.ts, 35, 26))
>Awaited : Symbol(Awaited, Decl(lib.es5.d.ts, --, --))
>Promise : Symbol(Promise, Decl(lib.es5.d.ts, --, --), Decl(lib.es2015.symbol.wellknown.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --), Decl(lib.es2015.promise.d.ts, --, --))

type T30 = Awaited<number | Promise<never>>; // number (same as 'await')
>T30 : Symbol(T30, Decl(awaitedOfT.ts, 36, 45))
>Awaited : Symbol(Awaited, Decl(lib.es5.d.ts, --, --))
>Promise : Symbol(Promise, Decl(lib.es5.d.ts, --, --), Decl(lib.es2015.symbol.wellknown.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --), Decl(lib.es2015.promise.d.ts, --, --))

type T31 = Awaited<PromiseLike<number> | Promise<string>>; // string | number (same as 'await')
>T31 : Symbol(T31, Decl(awaitedOfT.ts, 37, 44))
>Awaited : Symbol(Awaited, Decl(lib.es5.d.ts, --, --))
>PromiseLike : Symbol(PromiseLike, Decl(lib.es5.d.ts, --, --))
>Promise : Symbol(Promise, Decl(lib.es5.d.ts, --, --), Decl(lib.es2015.symbol.wellknown.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --), Decl(lib.es2015.promise.d.ts, --, --))

type T32 = Awaited<Awaited<number>>; // number (same as 'await')
>T32 : Symbol(T32, Decl(awaitedOfT.ts, 38, 58))
>Awaited : Symbol(Awaited, Decl(lib.es5.d.ts, --, --))
>Awaited : Symbol(Awaited, Decl(lib.es5.d.ts, --, --))

type T33 = Awaited<Promise<Awaited<Promise<number>>>>; // number (same as 'await')
>T33 : Symbol(T33, Decl(awaitedOfT.ts, 39, 36))
>Awaited : Symbol(Awaited, Decl(lib.es5.d.ts, --, --))
>Promise : Symbol(Promise, Decl(lib.es5.d.ts, --, --), Decl(lib.es2015.symbol.wellknown.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --), Decl(lib.es2015.promise.d.ts, --, --))
>Awaited : Symbol(Awaited, Decl(lib.es5.d.ts, --, --))
>Promise : Symbol(Promise, Decl(lib.es5.d.ts, --, --), Decl(lib.es2015.symbol.wellknown.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --), Decl(lib.es2015.promise.d.ts, --, --))

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