23 lines
561 B
JavaScript
23 lines
561 B
JavaScript
class C {
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constructor() { }
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}
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class D {
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constructor():number { }
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}
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// the return type of a constructor overrides the type of the class
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declare class Bar<T> {}
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declare class Foo<T> {
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constructor<U>(iterable: U): Bar<U>;
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}
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(new Foo('x'): Bar<string>); // ok
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(new Foo(123): Bar<string>); // error, number !~> string
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// also overrides when it returns a different specialization of the same class
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declare class Baz<T> {
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constructor<U>(iterable: U): Baz<U>;
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}
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(new Baz('x'): Baz<string>); // ok
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(new Baz(123): Baz<string>); // error, number !~> string
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