TypeScript/tests/cases/compiler/tupleTypeInference.ts
2015-08-04 11:43:13 -07:00

22 lines
684 B
TypeScript

declare var $q: IQService;
interface IQService {
all<T1, T2, T3>(x: [IPromise<T1>, IPromise<T2>, IPromise<T3>]): IPromise<[T1, T2, T3]>;
all<T1, T2>(x: [IPromise<T1>, IPromise<T2>]): IPromise<[T1, T2]>;
all<T1>(x: [IPromise<T1>]): IPromise<[T1]>;
when<T>(t?: T): IPromise<T>;
}
interface IPromise<T> {
then<TResult>(callback: (t: T) => TResult): IPromise<TResult>;
}
// Implicit different types
var a = $q.all([$q.when<string>(), $q.when<number>()]);
// Explicit different types
var b = $q.all<string, number>([$q.when<string>(), $q.when<number>()]);
// Implicit identical types
var c = $q.all([$q.when<string>(), $q.when<string>()]);