25 lines
1 KiB
Plaintext
25 lines
1 KiB
Plaintext
==== tests/cases/compiler/genericTypeAssertions2.ts (3 errors) ====
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class A<T> { foo(x: T) { } }
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class B<T> extends A<T> {
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bar(): T {
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return null;
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}
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}
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var foo = new A<number>();
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var r: A<string> = <B<string>>new B();
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var r2: A<number> = <B<string>>new B(); // error
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~~
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!!! Type 'B<string>' is not assignable to type 'A<number>':
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!!! Types of property 'foo' are incompatible:
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!!! Type '(x: string) => void' is not assignable to type '(x: number) => void':
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!!! Types of parameters 'x' and 'x' are incompatible:
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!!! Type 'string' is not assignable to type 'number'.
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var r3: B<number> = <A<number>>new B(); // error
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~~
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!!! Type 'A<number>' is not assignable to type 'B<number>':
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!!! Property 'bar' is missing in type 'A<number>'.
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var r4: A<number> = <A<number>>new A();
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var r5: A<number> = <A<number>>[]; // error
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~~~~~~~~~~~~~
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!!! Neither type 'A<number>' nor type 'any[]' is assignable to the other. |