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=== tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypingWithObjectMembers2.ts ===
interface Base {
foo: string;
>foo : string
}
interface Derived extends Base {
bar: string;
>bar : string
}
// N and M have the same name, same accessibility, same optionality, and N is a subtype of M
// foo properties are valid, bar properties cause errors in the derived class declarations
module NotOptional {
interface A {
foo: Base;
>foo : Base
bar: Base;
>bar : Base
}
interface B extends A {
foo: Derived; // ok
>foo : Derived
bar: string; // error
>bar : string
}
interface A2 {
1: Base;
>1 : Base
2.0: Base;
>2.0 : Base
}
interface B2 extends A2 {
1: Derived; // ok
>1 : Derived
2: string; // error
>2 : string
}
interface A3 {
'1': Base;
>'1' : Base
'2.0': Base;
>'2.0' : Base
}
interface B3 extends A3 {
'1': Derived; // ok
>'1' : Derived
'2.0': string; // error
>'2.0' : string
}
}
// same cases as above but with optional
module Optional {
interface A {
foo?: Base;
>foo : Base
bar?: Base;
>bar : Base
}
interface B extends A {
foo?: Derived; // ok
>foo : Derived
bar?: string; // error
>bar : string
}
interface A2 {
1?: Base;
>1 : Base
2.0?: Base;
>2.0 : Base
}
interface B2 extends A2 {
1?: Derived; // ok
>1 : Derived
2?: string; // error
>2 : string
}
interface A3 {
'1'?: Base;
>'1' : Base
'2.0'?: Base;
>'2.0' : Base
}
interface B3 extends A3 {
'1'?: Derived; // ok
>'1' : Derived
'2.0'?: string; // error
>'2.0' : string
}
}
|
