61 lines
1.9 KiB
Plaintext
61 lines
1.9 KiB
Plaintext
==== 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 {
|
|
~
|
|
!!! 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'.
|
|
[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> {
|
|
~~
|
|
!!! Class 'B3<T>' incorrectly implements interface 'A<T>':
|
|
!!! Index signatures are incompatible:
|
|
!!! Type 'Base' is not assignable to type 'T'.
|
|
[x: string]: Base; // error
|
|
}
|
|
|
|
class B4<T extends Derived> implements A<T> {
|
|
~~
|
|
!!! Class 'B4<T>' incorrectly implements interface 'A<T>':
|
|
!!! Index signatures are incompatible:
|
|
!!! Type 'Derived' is not assignable to type 'T'.
|
|
[x: string]: Derived; // error
|
|
}
|
|
|
|
class B5<T extends Derived2> implements A<T> {
|
|
~~
|
|
!!! Class 'B5<T>' incorrectly implements interface 'A<T>':
|
|
!!! Index signatures are incompatible:
|
|
!!! Type 'Derived2' is not assignable to type 'T'.
|
|
[x: string]: Derived2; // error
|
|
}
|
|
} |