62 lines
1.1 KiB
TypeScript
62 lines
1.1 KiB
TypeScript
interface Base {
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foo: string;
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}
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interface Derived extends Base {
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bar: string;
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}
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// N and M have the same name, same accessibility, same optionality, and N is a subtype of M
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// foo properties are valid, bar properties cause errors in the derived class declarations
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module NotOptional {
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interface A {
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foo: Base;
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}
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class B implements A {
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fooo: Derived; // error
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}
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interface A2 {
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1: Base;
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}
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class B2 implements A2 {
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2: Derived; // error
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}
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interface A3 {
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'1': Base;
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}
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class B3 implements A3 {
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'1.0': Derived; // error
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}
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}
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// same cases as above but with optional
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module Optional {
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interface A {
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foo?: Base;
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}
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class B implements A {
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fooo: Derived; // weak type error
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}
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interface A2 {
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1?: Base;
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}
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class B2 implements A2 {
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2: Derived; // weak type error
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}
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interface A3 {
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'1'?: Base;
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}
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class B3 implements A3 {
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'1.0': Derived; // weak type error
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}
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}
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