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//// [subtypingWithNumericIndexer2.ts]
// 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;
}
interface B extends A {
[x: number]: Base; // error
}
interface B2 extends A {
[x: number]: Derived2; // ok
}
module Generics {
interface A<T extends Derived> {
[x: number]: T;
}
interface B extends A<Base> {
[x: number]: Derived; // error
}
interface B2 extends A<Derived> {
[x: number]: Derived2; // ok
}
interface B3<T extends Derived> extends A<T> {
[x: number]: Base; // error
}
interface B4<T extends Derived> extends A<T> {
[x: number]: Derived; // error
}
interface B5<T extends Derived2> extends A<T> {
[x: number]: Derived2; // error
}
}
//// [subtypingWithNumericIndexer2.js]
// Derived type indexer must be subtype of base type indexer
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