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44 lines
781 B
TypeScript
44 lines
781 B
TypeScript
// @strict: *
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// @checkJS: true
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// @allowJS: true
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// @noEmit: true
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// @filename: defs.d.ts
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declare function f1(p: void): void;
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declare function f2(p: undefined): void;
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declare function f3(p: unknown): void;
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declare function f4(p: any): void;
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interface I<T> { m(p: T): void; }
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declare const o1: I<void>;
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declare const o2: I<undefined>;
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declare const o3: I<unknown>;
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declare const o4: I<any>;
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// @filename: jsfile.js
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// current behavior: treat trailing `void` as optional
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f1();
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o1.m();
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// new behavior: treat 'undefined', 'unknown', and 'any' as optional in non-strict mode
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f2();
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f3();
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f4();
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o2.m();
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o3.m();
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o4.m();
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// @filename: tsfile.ts
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// current behavior: treat trailing `void` as optional
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f1();
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o1.m();
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// no change in behavior
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f2();
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f3();
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f4();
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o2.m();
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o3.m();
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o4.m();
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