40 lines
1.4 KiB
Plaintext
40 lines
1.4 KiB
Plaintext
==== tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithOverloadedFunctionTypedArguments2.ts (1 errors) ====
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// Function typed arguments with multiple signatures must be passed an implementation that matches all of them
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// Inferences are made quadratic-pairwise to and from these overload sets
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module NonGenericParameter {
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var a: {
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(x: boolean): boolean;
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(x: string): string;
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}
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function foo4(cb: typeof a) {
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return cb;
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}
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var r3 = foo4(<T, U>(x: T) => { var r: U; return r }); // ok
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}
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module GenericParameter {
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function foo5<T>(cb: { (x: T): string; (x: number): T }) {
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return cb;
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}
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var r6 = foo5(<T>(x: T) => x); // ok
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function foo6<T>(cb: { (x: T): string; (x: T, y?: T): string }) {
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return cb;
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}
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var r10 = foo6(<T>(x: T, y: T) => ''); // error
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~~~~~~~~~~~~~~~~~~~~~
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!!! Argument of type '<T>(x: T, y: T) => string' is not assignable to parameter of type '{ (x: any): string; (x: any, y?: any): string; }'.
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function foo7<T>(x:T, cb: { (x: T): string; (x: T, y?: T): string }) {
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return cb;
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}
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var r13 = foo7(1, <T>(x: T) => x); // ok
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var a: { <T>(x: T): number; <T>(x: number): T; }
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var r14 = foo7(1, a); // ok
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} |