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=== tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithNumericIndexer3.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
class A {
>A : A
[x: number]: Derived;
>x : number
}
var a: A;
>a : A
var b: { [x: number]: Base; };
>b : { [x: number]: Base; }
>x : number
a = b; // error
>a = b : { [x: number]: Base; }
>a : A
>b : { [x: number]: Base; }
b = a; // ok
>b = a : A
>b : { [x: number]: Base; }
>a : A
class B2 extends A {
>B2 : B2
>A : A
[x: number]: Derived2; // ok
>x : number
}
var b2: { [x: number]: Derived2; };
>b2 : { [x: number]: Derived2; }
>x : number
a = b2; // ok
>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
class A<T extends Derived> {
>A : A<T>
[x: number]: T;
>x : number
}
function foo<T extends Derived>() {
>foo : <T extends Derived>() => 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; // ok
>b = a : A<T>
>b : { [x: number]: Derived; }
>a : A<T>
var b2: { [x: number]: T; };
>b2 : { [x: number]: T; }
>x : number
a = b2; // ok
>a = b2 : { [x: number]: T; }
>a : A<T>
>b2 : { [x: number]: T; }
b2 = a; // ok
>b2 = a : A<T>
>b2 : { [x: number]: T; }
>a : A<T>
}
}
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