20 lines
461 B
Plaintext
20 lines
461 B
Plaintext
==== tests/cases/compiler/constraints0.ts (1 errors) ====
|
|
interface A {
|
|
a: number;
|
|
}
|
|
|
|
interface B {
|
|
b: string;
|
|
}
|
|
|
|
interface C<T extends A> {
|
|
x: T;
|
|
}
|
|
|
|
var v1: C<A>; // should work
|
|
var v2: C<B>; // should not work
|
|
~~~~
|
|
!!! Type 'B' does not satisfy the constraint 'A':
|
|
!!! Property 'a' is missing in type 'B'.
|
|
|
|
var y = v1.x.a; // 'a' should be of type 'number' |