45 lines
1.7 KiB
Plaintext
45 lines
1.7 KiB
Plaintext
==== tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypingWithNumericIndexer4.ts (4 errors) ====
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// Derived type indexer must be subtype of base type indexer
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interface Base { foo: string; }
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interface Derived extends Base { bar: string; }
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interface Derived2 extends Derived { baz: string; }
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class A {
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[x: number]: Derived;
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}
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class B extends A {
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~
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!!! error TS2416: Class 'B' incorrectly extends base class 'A':
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!!! error TS2416: Index signatures are incompatible:
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!!! error TS2416: Type 'string' is not assignable to type 'Derived':
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!!! error TS2416: Property 'bar' is missing in type 'String'.
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[x: number]: string; // error
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}
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module Generics {
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class A<T extends Derived> {
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[x: number]: T;
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}
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class B extends A<Base> {
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~
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!!! error TS2416: Class 'B' incorrectly extends base class 'A<Base>':
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!!! error TS2416: Index signatures are incompatible:
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!!! error TS2416: Type 'string' is not assignable to type 'Base':
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!!! error TS2416: Property 'foo' is missing in type 'String'.
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~~~~~~~
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!!! error TS2343: Type 'Base' does not satisfy the constraint 'Derived':
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!!! error TS2343: Property 'bar' is missing in type 'Base'.
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[x: number]: string; // error
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}
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class B3<T extends Derived> extends A<T> {
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~~
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!!! error TS2416: Class 'B3<T>' incorrectly extends base class 'A<T>':
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!!! error TS2416: Index signatures are incompatible:
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!!! error TS2416: Type 'string' is not assignable to type 'T'.
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[x: number]: string; // error
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}
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} |