60 lines
1.5 KiB
Plaintext
60 lines
1.5 KiB
Plaintext
=== tests/cases/compiler/promiseChaining.ts ===
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class Chain<T> {
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>Chain : Chain<T>
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>T : T
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constructor(public value: T) { }
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>value : T
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>T : T
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then<S>(cb: (x: T) => S): Chain<S> {
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>then : <S>(cb: (x: T) => S) => Chain<S>
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>S : S
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>cb : (x: T) => S
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>x : T
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>T : T
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>S : S
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>Chain : Chain<T>
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>S : S
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var result = cb(this.value);
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>result : S
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>cb(this.value) : S
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>cb : (x: T) => S
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>this.value : T
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>this : Chain<T>
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>value : T
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// should get a fresh type parameter which each then call
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var z = this.then(x => result)/*S*/.then(x => "abc")/*string*/.then(x => x.length)/*number*/; // No error
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>z : Chain<number>
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>this.then(x => result)/*S*/.then(x => "abc")/*string*/.then(x => x.length) : Chain<number>
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>this.then(x => result)/*S*/.then(x => "abc")/*string*/.then : <S>(cb: (x: string) => S) => Chain<S>
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>this.then(x => result)/*S*/.then(x => "abc") : Chain<string>
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>this.then(x => result)/*S*/.then : <S>(cb: (x: S) => S) => Chain<S>
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>this.then(x => result) : Chain<S>
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>this.then : <S>(cb: (x: T) => S) => Chain<S>
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>this : Chain<T>
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>then : <S>(cb: (x: T) => S) => Chain<S>
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>x => result : (x: T) => S
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>x : T
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>result : S
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>then : <S>(cb: (x: S) => S) => Chain<S>
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>x => "abc" : (x: S) => string
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>x : S
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>then : <S>(cb: (x: string) => S) => Chain<S>
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>x => x.length : (x: string) => number
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>x : string
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>x.length : number
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>x : string
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>length : number
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return new Chain(result);
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>new Chain(result) : Chain<S>
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>Chain : typeof Chain
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>result : S
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}
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}
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