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tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithFunctionTypedArguments5.ts(10,16): error TS2322: Type '<T>(x: T, y: T) => string' is not assignable to type '(t: {}) => string'.
tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithFunctionTypedArguments5.ts(11,16): error TS2322: Type '(x: string, y: number) => string' is not assignable to type '(t: string) => string'.
==== tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithFunctionTypedArguments5.ts (2 errors) ====
// Generic call with parameter of object type with member of function type of n args passed object whose associated member is call signature with n+1 args
function foo<T, U>(arg: { cb: (t: T) => U }) {
return arg.cb(null);
}
var arg = { cb: <T>(x: T) => '' };
var r = foo(arg); // {}
// more args not allowed
var r2 = foo({ cb: <T>(x: T, y: T) => '' }); // error
~~
!!! error TS2322: Type '<T>(x: T, y: T) => string' is not assignable to type '(t: {}) => string'.
!!! related TS6500 tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithFunctionTypedArguments5.ts:3:27: The expected type comes from property 'cb' which is declared here on type '{ cb: (t: {}) => string; }'
var r3 = foo({ cb: (x: string, y: number) => '' }); // error
~~
!!! error TS2322: Type '(x: string, y: number) => string' is not assignable to type '(t: string) => string'.
!!! related TS6500 tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithFunctionTypedArguments5.ts:3:27: The expected type comes from property 'cb' which is declared here on type '{ cb: (t: string) => string; }'
function foo2<T, U>(arg: { cb: (t: T, t2: T) => U }) {
return arg.cb(null, null);
}
// fewer args ok
var r4 = foo(arg); // {}
var r5 = foo({ cb: <T>(x: T) => '' }); // {}
var r6 = foo({ cb: (x: string) => '' }); // string
var r7 = foo({ cb: () => '' }); // string
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