35 lines
802 B
TypeScript
35 lines
802 B
TypeScript
interface Computed<T> {
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read(): T;
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write(value: T);
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}
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function foo<T>(x: Computed<T>) { }
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var s: string;
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// Calls below should infer string for T and then assign that type to the value parameter
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foo({
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read: () => s,
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write: value => s = value
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});
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foo({
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write: value => s = value,
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read: () => s
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});
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enum E1 { X }
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enum E2 { X }
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// Check that we infer from both a.r and b before fixing T in a.w
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declare function f1<T, U>(a: { w: (x: T) => U; r: () => T; }, b: T): U;
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var v1: number;
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var v1 = f1({ w: x => x, r: () => 0 }, 0);
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var v1 = f1({ w: x => x, r: () => 0 }, E1.X);
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var v1 = f1({ w: x => x, r: () => E1.X }, 0);
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var v2: E1;
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var v2 = f1({ w: x => x, r: () => E1.X }, E1.X);
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var v3 = f1({ w: x => x, r: () => E1.X }, E2.X); // Error
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