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tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithGenericSignatureArguments2.ts(10,51): error TS2345: Argument of type '(x: string) => string' is not assignable to parameter of type '(x: number) => number'.
Types of parameters 'x' and 'x' are incompatible.
Type 'number' is not assignable to type 'string'.
tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithGenericSignatureArguments2.ts(15,21): error TS2345: Argument of type 'Date' is not assignable to parameter of type 'T'.
'Date' is assignable to the constraint of type 'T', but 'T' could be instantiated with a different subtype of constraint 'Date'.
tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithGenericSignatureArguments2.ts(16,22): error TS2345: Argument of type 'number' is not assignable to parameter of type 'T'.
'T' could be instantiated with an arbitrary type which could be unrelated to 'number'.
tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithGenericSignatureArguments2.ts(25,23): error TS2345: Argument of type '(a: T) => T' is not assignable to parameter of type '(x: Date) => Date'.
Types of parameters 'a' and 'x' are incompatible.
Type 'Date' is not assignable to type 'T'.
'T' could be instantiated with an arbitrary type which could be unrelated to 'Date'.
tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithGenericSignatureArguments2.ts(37,43): error TS2322: Type 'F' is not assignable to type 'E'.
tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithGenericSignatureArguments2.ts(50,21): error TS2345: Argument of type 'Date' is not assignable to parameter of type 'T'.
'Date' is assignable to the constraint of type 'T', but 'T' could be instantiated with a different subtype of constraint 'Date'.
tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithGenericSignatureArguments2.ts(51,22): error TS2345: Argument of type 'number' is not assignable to parameter of type 'T'.
'T' could be instantiated with an arbitrary type which could be unrelated to 'number'.
tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithGenericSignatureArguments2.ts(60,23): error TS2345: Argument of type '(a: T) => T' is not assignable to parameter of type '(x: Date) => Date'.
Types of parameters 'a' and 'x' are incompatible.
Type 'Date' is not assignable to type 'T'.
'T' could be instantiated with an arbitrary type which could be unrelated to 'Date'.
tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithGenericSignatureArguments2.ts(67,51): error TS2304: Cannot find name 'U'.
tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithGenericSignatureArguments2.ts(67,57): error TS2304: Cannot find name 'U'.
==== tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithGenericSignatureArguments2.ts (10 errors) ====
// When a function expression is inferentially typed (section 4.9.3) and a type assigned to a parameter in that expression references type parameters for which inferences are being made,
// the corresponding inferred type arguments to become fixed and no further candidate inferences are made for them.
module onlyT {
function foo<T>(a: (x: T) => T, b: (x: T) => T) {
var r: (x: T) => T;
return r;
}
var r1: (x: {}) => {} = foo((x: number) => 1, (x: string) => '');
~~~~~~~~~~~~~~~~~
!!! error TS2345: Argument of type '(x: string) => string' is not assignable to parameter of type '(x: number) => number'.
!!! error TS2345: Types of parameters 'x' and 'x' are incompatible.
!!! error TS2345: Type 'number' is not assignable to type 'string'.
function other2<T extends Date>(x: T) {
var r7 = foo((a: T) => a, (b: T) => b); // T => T
// BUG 835518
var r9 = r7(new Date()); // should be ok
~~~~~~~~~~
!!! error TS2345: Argument of type 'Date' is not assignable to parameter of type 'T'.
!!! error TS2345: 'Date' is assignable to the constraint of type 'T', but 'T' could be instantiated with a different subtype of constraint 'Date'.
var r10 = r7(1); // error
~
!!! error TS2345: Argument of type 'number' is not assignable to parameter of type 'T'.
!!! error TS2345: 'T' could be instantiated with an arbitrary type which could be unrelated to 'number'.
}
function foo2<T extends Date>(a: (x: T) => T, b: (x: T) => T) {
var r: (x: T) => T;
return r;
}
function other3<T extends RegExp>(x: T) {
var r7 = foo2((a: T) => a, (b: T) => b); // error
~~~~~~~~~~~
!!! error TS2345: Argument of type '(a: T) => T' is not assignable to parameter of type '(x: Date) => Date'.
!!! error TS2345: Types of parameters 'a' and 'x' are incompatible.
!!! error TS2345: Type 'Date' is not assignable to type 'T'.
!!! error TS2345: 'T' could be instantiated with an arbitrary type which could be unrelated to 'Date'.
var r7b = foo2((a) => a, (b) => b); // valid, T is inferred to be Date
}
enum E { A }
enum F { A }
function foo3<T>(x: T, a: (x: T) => T, b: (x: T) => T) {
var r: (x: T) => T;
return r;
}
var r7 = foo3(E.A, (x) => E.A, (x) => F.A); // error
~~~
!!! error TS2322: Type 'F' is not assignable to type 'E'.
!!! related TS6502 tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithGenericSignatureArguments2.ts:32:47: The expected type comes from the return type of this signature.
}
module TU {
function foo<T, U>(a: (x: T) => T, b: (x: U) => U) {
var r: (x: T) => T;
return r;
}
var r1: (x: {}) => {} = foo((x: number) => 1, (x: string) => '');
function other2<T extends Date>(x: T) {
var r7 = foo((a: T) => a, (b: T) => b);
var r9 = r7(new Date());
~~~~~~~~~~
!!! error TS2345: Argument of type 'Date' is not assignable to parameter of type 'T'.
!!! error TS2345: 'Date' is assignable to the constraint of type 'T', but 'T' could be instantiated with a different subtype of constraint 'Date'.
var r10 = r7(1);
~
!!! error TS2345: Argument of type 'number' is not assignable to parameter of type 'T'.
!!! error TS2345: 'T' could be instantiated with an arbitrary type which could be unrelated to 'number'.
}
function foo2<T extends Date, U extends Date>(a: (x: T) => T, b: (x: U) => U) {
var r: (x: T) => T;
return r;
}
function other3<T extends RegExp>(x: T) {
var r7 = foo2((a: T) => a, (b: T) => b);
~~~~~~~~~~~
!!! error TS2345: Argument of type '(a: T) => T' is not assignable to parameter of type '(x: Date) => Date'.
!!! error TS2345: Types of parameters 'a' and 'x' are incompatible.
!!! error TS2345: Type 'Date' is not assignable to type 'T'.
!!! error TS2345: 'T' could be instantiated with an arbitrary type which could be unrelated to 'Date'.
var r7b = foo2((a) => a, (b) => b);
}
enum E { A }
enum F { A }
function foo3<T>(x: T, a: (x: T) => T, b: (x: U) => U) {
~
!!! error TS2304: Cannot find name 'U'.
~
!!! error TS2304: Cannot find name 'U'.
var r: (x: T) => T;
return r;
}
var r7 = foo3(E.A, (x) => E.A, (x) => F.A);
}
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