54 lines
1.9 KiB
Plaintext
54 lines
1.9 KiB
Plaintext
==== tests/cases/compiler/genericSpecializations3.ts (3 errors) ====
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interface IFoo<T> {
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foo(x: T): T;
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}
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var iFoo: IFoo<number>;
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iFoo.foo(1);
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class IntFooBad implements IFoo<number> { // error
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~~~~~~~~~
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!!! Class 'IntFooBad' incorrectly implements interface 'IFoo<number>':
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!!! Types of property 'foo' are incompatible:
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!!! Type '(x: string) => string' is not assignable to type '(x: number) => number':
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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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foo(x: string): string { return null; }
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}
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var intFooBad: IntFooBad;
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class IntFoo implements IFoo<number> {
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foo(x: number): number { return null; }
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}
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var intFoo: IntFoo;
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class StringFoo2 implements IFoo<string> {
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foo(x: string): string { return null; }
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}
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var stringFoo2: StringFoo2;
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stringFoo2.foo("hm");
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intFoo = stringFoo2; // error
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~~~~~~
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!!! Type 'StringFoo2' is not assignable to type 'IntFoo':
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!!! Types of property 'foo' are incompatible:
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!!! Type '(x: string) => string' is not assignable to type '(x: number) => number':
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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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stringFoo2 = intFoo; // error
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~~~~~~~~~~
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!!! Type 'IntFoo' is not assignable to type 'StringFoo2':
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!!! Types of property 'foo' are incompatible:
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!!! Type '(x: number) => number' is not assignable to type '(x: string) => string':
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!!! Types of parameters 'x' and 'x' are incompatible:
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!!! Type 'number' is not assignable to type 'string'.
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class StringFoo3 implements IFoo<string> { // error
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foo<T>(x: T): T { return null; }
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}
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var stringFoo3: StringFoo3; |