90 lines
1.9 KiB
Plaintext
90 lines
1.9 KiB
Plaintext
=== tests/cases/compiler/promiseIdentity.ts ===
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interface IPromise<T> {
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>IPromise : IPromise<T>
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>T : T
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then<U>(callback: (x: T) => IPromise<U>): IPromise<U>;
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>then : <U>(callback: (x: T) => IPromise<U>) => IPromise<U>
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>U : U
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>callback : (x: T) => IPromise<U>
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>x : T
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>T : T
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>IPromise : IPromise<T>
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>U : U
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>IPromise : IPromise<T>
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>U : U
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}
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interface Promise<T> {
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>Promise : Promise<T>
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>T : T
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then<U>(callback: (x: T) => Promise<U>): Promise<U>;
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>then : <U>(callback: (x: T) => Promise<U>) => Promise<U>
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>U : U
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>callback : (x: T) => Promise<U>
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>x : T
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>T : T
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>Promise : Promise<T>
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>U : U
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>Promise : Promise<T>
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>U : U
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}
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var x: IPromise<string>;
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>x : IPromise<string>
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>IPromise : IPromise<T>
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var x: Promise<string>;
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>x : IPromise<string>
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>Promise : Promise<T>
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interface IPromise2<T, V> {
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>IPromise2 : IPromise2<T, V>
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>T : T
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>V : V
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then<U, W>(callback: (x: T) => IPromise2<U, W>): IPromise2<W, U>;
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>then : <U, W>(callback: (x: T) => IPromise2<U, W>) => IPromise2<W, U>
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>U : U
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>W : W
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>callback : (x: T) => IPromise2<U, W>
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>x : T
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>T : T
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>IPromise2 : IPromise2<T, V>
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>U : U
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>W : W
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>IPromise2 : IPromise2<T, V>
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>W : W
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>U : U
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}
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interface Promise2<T, V> {
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>Promise2 : Promise2<T, V>
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>T : T
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>V : V
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then<U, W>(callback: (x: V) => Promise2<U, T>): Promise2<T, W>; // Uses V instead of T in callback's parameter
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>then : <U, W>(callback: (x: V) => Promise2<U, T>) => Promise2<T, W>
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>U : U
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>W : W
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>callback : (x: V) => Promise2<U, T>
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>x : V
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>V : V
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>Promise2 : Promise2<T, V>
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>U : U
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>T : T
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>Promise2 : Promise2<T, V>
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>T : T
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>W : W
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}
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// Ok because T in this particular Promise2 is any, as are all the U and W references.
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// Also, the V of Promise2 happens to coincide with the T of IPromise2 (they are both string).
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var y: IPromise2<string, number>;
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>y : IPromise2<string, number>
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>IPromise2 : IPromise2<T, V>
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var y: Promise2<any, string>;
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>y : IPromise2<string, number>
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>Promise2 : Promise2<T, V>
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