32 lines
No EOL
655 B
TypeScript
32 lines
No EOL
655 B
TypeScript
class Base {
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x: string;
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}
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class Derived extends Base {
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y: string;
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}
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class Derived2 extends Base {
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z: string;
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}
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// returns {}[]
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function f<T extends Base, U extends Base>(a: { x: T; y: U }) {
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return [a.x, a.y];
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}
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var r = f({ x: new Derived(), y: new Derived2() }); // {}[]
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var r2 = f({ x: new Base(), y: new Derived2() }); // {}[]
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function f2<T extends Base, U extends Base>(a: { x: T; y: U }) {
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return (x: T) => a.y;
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}
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var r3 = f2({ x: new Derived(), y: new Derived2() }); // Derived => Derived2
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interface I<T, U> {
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x: T;
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y: U;
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}
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var i: I<Base, Derived>;
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var r4 = f2(i); // Base => Derived
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