35 lines
772 B
JavaScript
35 lines
772 B
JavaScript
// You should be able to use an object as a function
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function a(x: { (z: number): string }): (z: number) => string {
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return x;
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}
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// ...and it should notice when the return type is wrong
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function b(x: { (z: number): string }): (z: number) => number {
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return x;
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}
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// ...or if the param type is wrong
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function c(x: { (z: number): string }): (z: string) => string {
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return x;
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}
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// ...or if the arity is wrong
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function d(x: { (z: number): string }): () => string {
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return x;
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}
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// ...or if it doesn't have a call property
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function e(x: {}): () => string {
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return x;
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}
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// AnyFunT should also be allowed
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function f(x: { (z: number): string }): Function {
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return x;
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}
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// ... but only if the object is callable
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function g(x: {}): Function {
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return x; // error
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}
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