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tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithOverloadedFunctionTypedArguments2.ts(28,20): error TS2345: Argument of type '<T>(x: T, y: T) => string' is not assignable to parameter of type '{ (x: {}): string; (x: {}, y?: {}): string; }'.
==== tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithOverloadedFunctionTypedArguments2.ts (1 errors) ====
// Function typed arguments with multiple signatures must be passed an implementation that matches all of them
// Inferences are made quadratic-pairwise to and from these overload sets
module NonGenericParameter {
var a: {
(x: boolean): boolean;
(x: string): string;
}
function foo4(cb: typeof a) {
return cb;
}
var r3 = foo4(<T, U>(x: T) => { var r: U; return r }); // ok
}
module GenericParameter {
function foo5<T>(cb: { (x: T): string; (x: number): T }) {
return cb;
}
var r6 = foo5(<T>(x: T) => x); // ok
function foo6<T>(cb: { (x: T): string; (x: T, y?: T): string }) {
return cb;
}
var r10 = foo6(<T>(x: T, y: T) => ''); // error
~~~~~~~~~~~~~~~~~~~~~
!!! error TS2345: Argument of type '<T>(x: T, y: T) => string' is not assignable to parameter of type '{ (x: {}): string; (x: {}, y?: {}): string; }'.
function foo7<T>(x:T, cb: { (x: T): string; (x: T, y?: T): string }) {
return cb;
}
var r13 = foo7(1, <T>(x: T) => x); // ok
var a: { <T>(x: T): number; <T>(x: number): T; }
var r14 = foo7(1, a); // ok
}
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