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//// [subtypingWithObjectMembersOptionality2.ts]
// Derived member is optional but base member is not, should be an error
interface Base { foo: string; }
interface Derived extends Base { bar: string; }
interface T {
Foo: Base;
}
interface S extends T {
Foo?: Derived // error
}
interface T2 {
1: Base;
}
interface S2 extends T2 {
1?: Derived; // error
}
interface T3 {
'1': Base;
}
interface S3 extends T3 {
'1'?: Derived; // error
}
// object literal case
var a: { Foo: Base; }
var b: { Foo?: Derived; }
var r = true ? a : b; // ok
//// [subtypingWithObjectMembersOptionality2.js]
// Derived member is optional but base member is not, should be an error
// object literal case
var a;
var b;
var r = true ? a : b; // ok
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