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tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypingWithNumericIndexer5.ts(11,7): error TS2420: Class 'B' incorrectly implements interface 'A'.
Index signatures are incompatible.
Type 'Base' is not assignable to type 'Derived'.
Property 'bar' is missing in type 'Base'.
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypingWithNumericIndexer5.ts(32,11): error TS2420: Class 'B3<T>' incorrectly implements interface 'A<T>'.
Index signatures are incompatible.
Type 'Base' is not assignable to type 'T'.
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypingWithNumericIndexer5.ts(36,11): error TS2420: Class 'B4<T>' incorrectly implements interface 'A<T>'.
Index signatures are incompatible.
Type 'Derived' is not assignable to type 'T'.
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypingWithNumericIndexer5.ts(40,11): error TS2420: Class 'B5<T>' incorrectly implements interface 'A<T>'.
Index signatures are incompatible.
Type 'Derived2' is not assignable to type 'T'.
==== tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypingWithNumericIndexer5.ts (4 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; }
interface A {
[x: number]: Derived;
}
class B implements A {
~
!!! error TS2420: Class 'B' incorrectly implements interface 'A'.
!!! error TS2420: Index signatures are incompatible.
!!! error TS2420: Type 'Base' is not assignable to type 'Derived'.
!!! error TS2420: Property 'bar' is missing in type 'Base'.
[x: string]: Base; // error
}
class B2 implements A {
[x: string]: Derived2; // ok
}
module Generics {
interface A<T extends Base> {
[x: number]: T;
}
class B implements A<Base> {
[x: string]: Derived; // ok
}
class B2 implements A<Derived> {
[x: string]: Derived2; // ok
}
class B3<T extends Derived> implements A<T> {
~~
!!! error TS2420: Class 'B3<T>' incorrectly implements interface 'A<T>'.
!!! error TS2420: Index signatures are incompatible.
!!! error TS2420: Type 'Base' is not assignable to type 'T'.
[x: string]: Base; // error
}
class B4<T extends Derived> implements A<T> {
~~
!!! error TS2420: Class 'B4<T>' incorrectly implements interface 'A<T>'.
!!! error TS2420: Index signatures are incompatible.
!!! error TS2420: Type 'Derived' is not assignable to type 'T'.
[x: string]: Derived; // error
}
class B5<T extends Derived2> implements A<T> {
~~
!!! error TS2420: Class 'B5<T>' incorrectly implements interface 'A<T>'.
!!! error TS2420: Index signatures are incompatible.
!!! error TS2420: Type 'Derived2' is not assignable to type 'T'.
[x: string]: Derived2; // error
}
}
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