8a0b8822b2
* Fix multiple issues with contextually typed parameters * Accept new baselines * Fix lint error * Add tests * Address CR feedback * Add fourslash tests
87 lines
2.6 KiB
TypeScript
87 lines
2.6 KiB
TypeScript
// @strict: true
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// @declaration: true
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declare function id1<T>(input: T): T;
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declare function id2<T extends (x: any) => any>(input: T): T;
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declare function id3<T extends (x: { foo: any }) => any>(input: T): T;
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declare function id4<T extends (x: { foo?: number }) => any>(input: T): T;
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declare function id5<T extends (x?: number) => any>(input: T): T;
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const f10 = function ({ foo = 42 }) { return foo };
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const f11 = id1(function ({ foo = 42 }) { return foo });
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const f12 = id2(function ({ foo = 42 }) { return foo });
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const f13 = id3(function ({ foo = 42 }) { return foo });
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const f14 = id4(function ({ foo = 42 }) { return foo });
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const f20 = function (foo = 42) { return foo };
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const f21 = id1(function (foo = 42) { return foo });
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const f22 = id2(function (foo = 42) { return foo });
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const f25 = id5(function (foo = 42) { return foo });
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const f1 = (x = 1) => 0; // number
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const f2: any = (x = 1) => 0; // number
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const f3: unknown = (x = 1) => 0; // number
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const f4: Function = (x = 1) => 0; // number
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const f5: (...args: any[]) => any = (x = 1) => 0; // any
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const f6: () => any = (x = 1) => 0; // number
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const f7: () => any = (x?) => 0; // Implicit any error
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const f8: () => any = (...x) => 0; // []
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declare function g1<T>(x: T): T;
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declare function g2<T extends any>(x: T): T;
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declare function g3<T extends unknown>(x: T): T;
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declare function g4<T extends Function>(x: T): T;
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declare function g5<T extends (...args: any[]) => any>(x: T): T;
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declare function g6<T extends () => any>(x: T): T;
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g1((x = 1) => 0); // number
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g2((x = 1) => 0); // number
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g3((x = 1) => 0); // number
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g4((x = 1) => 0); // number
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g5((x = 1) => 0); // any
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g6((x = 1) => 0); // number
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g6((x?) => 0); // Implicit any error
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g6((...x) => 0); // []
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// Repro from #28816
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function id<T>(input: T): T { return input }
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function getFoo ({ foo = 42 }) {
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return foo;
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}
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const newGetFoo = id(getFoo);
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const newGetFoo2 = id(function getFoo ({ foo = 42 }) {
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return foo;
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});
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// Repro from comment in #30840
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declare function memoize<F extends Function>(func: F): F;
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function add(x: number, y = 0): number {
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return x + y;
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}
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const memoizedAdd = memoize(add);
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const add2 = (x: number, y = 0): number => x + y;
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const memoizedAdd2 = memoize(add2);
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const memoizedAdd3 = memoize((x: number, y = 0): number => x + y);
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// Repro from #36052
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declare function execute(script: string | Function): Promise<string>;
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export function executeSomething() {
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return execute((root: HTMLElement, debug = true) => {
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if (debug) {
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root.innerHTML = '';
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}
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});
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}
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const fz1 = (debug = true) => false;
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const fz2: Function = (debug = true) => false;
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