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=== tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithNumericIndexer2.ts ===
// Derived type indexer must be subtype of base type indexer
interface Base { foo: string; }
>foo : string
interface Derived extends Base { bar: string; }
>bar : string
interface Derived2 extends Derived { baz: string; }
>baz : string
interface A {
[x: number]: Base;
>x : number
}
var a: A;
>a : A
var b: { [x: number]: Derived; }
>b : { [x: number]: Derived; }
>x : number
a = b;
>a = b : { [x: number]: Derived; }
>a : A
>b : { [x: number]: Derived; }
b = a; // error
>b = a : A
>b : { [x: number]: Derived; }
>a : A
var b2: { [x: number]: Derived2; }
>b2 : { [x: number]: Derived2; }
>x : number
a = b2;
>a = b2 : { [x: number]: Derived2; }
>a : A
>b2 : { [x: number]: Derived2; }
b2 = a; // error
>b2 = a : A
>b2 : { [x: number]: Derived2; }
>a : A
module Generics {
>Generics : typeof Generics
interface A<T extends Base> {
[x: number]: T;
>x : number
}
interface B extends A<Base> {
[x: number]: Derived; // ok
>x : number
}
function foo<T extends Base>() {
>foo : <T extends Base>() => void
var a: A<T>;
>a : A<T>
var b: { [x: number]: Derived; }
>b : { [x: number]: Derived; }
>x : number
a = b; // error
>a = b : { [x: number]: Derived; }
>a : A<T>
>b : { [x: number]: Derived; }
b = a; // error
>b = a : A<T>
>b : { [x: number]: Derived; }
>a : A<T>
var b2: { [x: number]: Derived2; }
>b2 : { [x: number]: Derived2; }
>x : number
a = b2; // error
>a = b2 : { [x: number]: Derived2; }
>a : A<T>
>b2 : { [x: number]: Derived2; }
b2 = a; // error
>b2 = a : A<T>
>b2 : { [x: number]: Derived2; }
>a : A<T>
var b3: { [x: number]: T; }
>b3 : { [x: number]: T; }
>x : number
a = b3; // ok
>a = b3 : { [x: number]: T; }
>a : A<T>
>b3 : { [x: number]: T; }
b3 = a; // ok
>b3 = a : A<T>
>b3 : { [x: number]: T; }
>a : A<T>
}
}
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