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