14 lines
373 B
TypeScript
14 lines
373 B
TypeScript
// #22362
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interface MyPromise<T, U> {
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then(cb: (t: T) => void): void;
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thenUnion(cb: (t: T | U) => void): this;
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}
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interface DoNothingAlias<T, U> extends MyPromise<T, U> { }
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declare function shouldBeIdentity<T, U>(p: DoNothingAlias<T, U>): MyPromise<T, U>;
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declare const p1: MyPromise<boolean, any>;
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var p2 = shouldBeIdentity(p1);
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var p2: MyPromise<boolean, any>;
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