17 lines
960 B
Plaintext
17 lines
960 B
Plaintext
tests/cases/compiler/promiseIdentity2.ts(11,5): error TS2403: Subsequent variable declarations must have the same type. Variable 'x' must be of type 'IPromise<string, number>', but here has type 'Promise<any, string>'.
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==== tests/cases/compiler/promiseIdentity2.ts (1 errors) ====
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interface IPromise<T, V> {
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then<U, W>(callback: (x: T) => IPromise<U, W>): IPromise<U, W>;
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}
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interface Promise<T, V> {
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then<U, W>(callback: (x: T) => Promise<T, U>): Promise<T, W>;
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}
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// error because T is string in the first declaration, and T is boolean in the second
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// Return type and callback return type are ok because T is any in this particular Promise
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var x: IPromise<string, number>;
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var x: Promise<any, string>;
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~
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!!! error TS2403: Subsequent variable declarations must have the same type. Variable 'x' must be of type 'IPromise<string, number>', but here has type 'Promise<any, string>'. |