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tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypingWithStringIndexer.ts(32,11): error TS2415: Class 'B3<T>' incorrectly extends base class 'A<T>'.
Index signatures are incompatible.
Type 'Derived' is not assignable to type 'T'.
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypingWithStringIndexer.ts(36,11): error TS2415: Class 'B4<T>' incorrectly extends base class 'A<T>'.
Index signatures are incompatible.
Type 'Derived2' is not assignable to type 'T'.
==== 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> {
~~
!!! error TS2415: Class 'B3<T>' incorrectly extends base class 'A<T>'.
!!! error TS2415: Index signatures are incompatible.
!!! error TS2415: Type 'Derived' is not assignable to type 'T'.
[x: string]: Derived; // error
}
class B4<T extends Base> extends A<T> {
~~
!!! error TS2415: Class 'B4<T>' incorrectly extends base class 'A<T>'.
!!! error TS2415: Index signatures are incompatible.
!!! error TS2415: Type 'Derived2' is not assignable to type 'T'.
[x: string]: Derived2; // error
}
}
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