49 lines
1.4 KiB
Plaintext
49 lines
1.4 KiB
Plaintext
|
==== tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypingWithStringIndexer.ts (2 errors) ====
|
||
|
// Derived type indexer must be subtype of base type indexer
|
||
|
|
||
|
interface Base { foo: string; }
|
||
|
interface Derived extends Base { bar: string; }
|
||
|
interface Derived2 extends Derived { baz: string; }
|
||
|
|
||
|
class A {
|
||
|
[x: string]: Base;
|
||
|
}
|
||
|
|
||
|
class B extends A {
|
||
|
[x: string]: Derived; // ok
|
||
|
}
|
||
|
|
||
|
class B2 extends A {
|
||
|
[x: string]: Derived2; // ok
|
||
|
}
|
||
|
|
||
|
module Generics {
|
||
|
class A<T extends Base> {
|
||
|
[x: string]: T;
|
||
|
}
|
||
|
|
||
|
class B extends A<Base> {
|
||
|
[x: string]: Derived; // ok
|
||
|
}
|
||
|
|
||
|
class B2 extends A<Base> {
|
||
|
[x: string]: Derived2; // ok
|
||
|
}
|
||
|
|
||
|
class B3<T extends Base> extends A<T> {
|
||
|
~~
|
||
|
!!! Class 'B3<T>' incorrectly extends base class 'A<T>':
|
||
|
!!! Index signatures are incompatible:
|
||
|
!!! Type 'Derived' is not assignable to type 'T'.
|
||
|
[x: string]: Derived; // error
|
||
|
}
|
||
|
|
||
|
class B4<T extends Base> extends A<T> {
|
||
|
~~
|
||
|
!!! Class 'B4<T>' incorrectly extends base class 'A<T>':
|
||
|
!!! Index signatures are incompatible:
|
||
|
!!! Type 'Derived2' is not assignable to type 'T'.
|
||
|
[x: string]: Derived2; // error
|
||
|
}
|
||
|
}
|
||
|
|