17 lines
763 B
Plaintext
17 lines
763 B
Plaintext
==== tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithConstraintsTypeArgumentInference2.ts (2 errors) ====
|
|
// Generic call with parameters of T and U, U extends T, no parameter of type U
|
|
|
|
function foo<T, U extends T>(t: T) {
|
|
~~~~~~~~~~~
|
|
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
|
|
var u: U;
|
|
return u;
|
|
}
|
|
|
|
var r = foo(1); // ok
|
|
var r2 = foo(null); // {}
|
|
var r3 = foo(new Object()); // {}
|
|
var r4 = foo<Date, Date>(1); // error
|
|
~
|
|
!!! Argument of type 'number' is not assignable to parameter of type 'Date'.
|
|
var r5 = foo<Date, Date>(new Date()); // no error |