20 lines
701 B
TypeScript
20 lines
701 B
TypeScript
// @strict: true
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// @declaration: true
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declare function f1<T>(f1: (x: T) => void, f2: (x: T) => void): (x: T) => void;
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declare function f2<T>(obj: T, f1: (x: T) => void, f2: (x: T) => void): T;
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declare function f3<T>(obj: T, f1: (x: T) => void, f2: (f: (x: T) => void) => void): T;
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interface Func<T> { (x: T): void }
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declare function f4<T>(f1: Func<T>, f2: Func<T>): Func<T>;
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declare function fo(x: Object): void;
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declare function fs(x: string): void;
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declare function fx(f: (x: "def") => void): void;
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const x1 = f1(fo, fs); // (x: string) => void
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const x2 = f2("abc", fo, fs); // "abc"
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const x3 = f3("abc", fo, fx); // "abc" | "def"
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const x4 = f4(fo, fs); // Func<string>
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