13 lines
295 B
TypeScript
13 lines
295 B
TypeScript
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// Repro from #13346
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interface Chainable<T> {
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value(): T;
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mapValues<U>(func: (v: T[keyof T]) => U): Chainable<{[k in keyof T]: U}>;
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}
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declare function chain<T>(t: T): Chainable<T>;
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const square = (x: number) => x * x;
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const v = chain({a: 1, b: 2}).mapValues(square).value();
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