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Minor cleanup and some related tests

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This commit is contained in:
Ron Buckton
2018-02-04 18:49:28 -08:00
parent c4d7e4806a
commit 0bf0bf6f53
5 changed files with 561 additions and 7 deletions
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src/lib/es5.d.ts
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+3 -7
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@@ -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>;