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tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithFunctionTypedArguments.ts(26,18): error TS2345: Argument of type '(a: number) => string' is not assignable to parameter of type '(a: number) => 1'.
Type 'string' is not assignable to type '1'.
tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithFunctionTypedArguments.ts(30,23): error TS2345: Argument of type '(x: T) => string' is not assignable to parameter of type '(a: 1) => string'.
Types of parameters 'x' and 'a' are incompatible.
Type 'number' is not assignable to type 'T'.
'T' could be instantiated with an arbitrary type which could be unrelated to 'number'.
tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithFunctionTypedArguments.ts(33,23): error TS2345: Argument of type '(x: T) => string' is not assignable to parameter of type '(a: 1) => string'.
Types of parameters 'x' and 'a' are incompatible.
Type 'number' is not assignable to type 'T'.
'T' could be instantiated with an arbitrary type which could be unrelated to 'number'.
tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithFunctionTypedArguments.ts(34,24): error TS2345: Argument of type '(x: T) => string' is not assignable to parameter of type '(a: 1) => string'.
Types of parameters 'x' and 'a' are incompatible.
Type 'number' is not assignable to type 'T'.
'T' could be instantiated with an arbitrary type which could be unrelated to 'number'.
tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithFunctionTypedArguments.ts(35,23): error TS2345: Argument of type '(a: number) => string' is not assignable to parameter of type '(a: number) => 1'.
Type 'string' is not assignable to type '1'.
==== tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithFunctionTypedArguments.ts (5 errors) ====
// Generic functions used as arguments for function typed parameters are not used to make inferences from
// Using function arguments, no errors expected
function foo<T>(x: (a: T) => T) {
return x(null);
}
var r = foo(<U>(x: U) => ''); // {}
var r2 = foo<string>(<U>(x: U) => ''); // string
var r3 = foo(x => ''); // {}
function foo2<T, U>(x: T, cb: (a: T) => U) {
return cb(x);
}
var r4 = foo2(1, function <Z>(a: Z) { return '' }); // string, contextual signature instantiation is applied to generic functions
var r5 = foo2(1, (a) => ''); // string
var r6 = foo2<string, number>('', <Z>(a: Z) => 1);
function foo3<T, U>(x: T, cb: (a: T) => U, y: U) {
return cb(x);
}
var r7 = foo3(1, <Z>(a: Z) => '', ''); // string
var r8 = foo3(1, function (a) { return '' }, 1); // error
~~~~~~~~
!!! error TS2345: Argument of type '(a: number) => string' is not assignable to parameter of type '(a: number) => 1'.
!!! error TS2345: Type 'string' is not assignable to type '1'.
var r9 = foo3<number, string>(1, (a) => '', ''); // string
function other<T, U>(t: T, u: U) {
var r10 = foo2(1, (x: T) => ''); // error
~~~~~~~~~~~~
!!! error TS2345: Argument of type '(x: T) => string' is not assignable to parameter of type '(a: 1) => string'.
!!! error TS2345: Types of parameters 'x' and 'a' are incompatible.
!!! error TS2345: Type 'number' is not assignable to type 'T'.
!!! error TS2345: 'T' could be instantiated with an arbitrary type which could be unrelated to 'number'.
var r10 = foo2(1, (x) => ''); // string
var r11 = foo3(1, (x: T) => '', ''); // error
~~~~~~~~~~~~
!!! error TS2345: Argument of type '(x: T) => string' is not assignable to parameter of type '(a: 1) => string'.
!!! error TS2345: Types of parameters 'x' and 'a' are incompatible.
!!! error TS2345: Type 'number' is not assignable to type 'T'.
!!! error TS2345: 'T' could be instantiated with an arbitrary type which could be unrelated to 'number'.
var r11b = foo3(1, (x: T) => '', 1); // error
~~~~~~~~~~~~
!!! error TS2345: Argument of type '(x: T) => string' is not assignable to parameter of type '(a: 1) => string'.
!!! error TS2345: Types of parameters 'x' and 'a' are incompatible.
!!! error TS2345: Type 'number' is not assignable to type 'T'.
!!! error TS2345: 'T' could be instantiated with an arbitrary type which could be unrelated to 'number'.
var r12 = foo3(1, function (a) { return '' }, 1); // error
~~~~~~~~
!!! error TS2345: Argument of type '(a: number) => string' is not assignable to parameter of type '(a: number) => 1'.
!!! error TS2345: Type 'string' is not assignable to type '1'.
}
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