36 lines
1.9 KiB
Plaintext
36 lines
1.9 KiB
Plaintext
==== tests/cases/compiler/lambdaParamTypes.ts (6 errors) ====
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interface MyArrayWrapper<T> {
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constructor(initialItems?: T[]);
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doSomething(predicate: (x: T, y: T) => string): void;
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}
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declare function create<T>(initialValues?: T[]): MyArrayWrapper<T>;
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var thing = create([{ name: "bob", id: 24 }, { name: "doug", id: 32 }]);
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// Below should all be OK
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thing.doSomething((x, y) => x.name.charAt(0)); // x.name should be string, so should be OK
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thing.doSomething((x, y) => x.id.toExponential(0)); // x.id should be string, so should be OK
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thing.doSomething((x, y) => y.name.charAt(0)); // x.name should be string, so should be OK
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thing.doSomething((x, y) => y.id.toExponential(0)); // x.id should be string, so should be OK
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// Below should all be in error
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thing.doSomething((x, y) => x.foo); // no such property on x
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~~~
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!!! Property 'foo' does not exist on type '{ name: string; id: number; }'.
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thing.doSomething((x, y) => y.foo); // no such property on y
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~~~
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!!! Property 'foo' does not exist on type '{ name: string; id: number; }'.
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thing.doSomething((x, y) => x.id.charAt(0)); // x.id should be number, no charAt member
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~~~~~~
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!!! Property 'charAt' does not exist on type 'number'.
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thing.doSomething((x, y) => x.name.toExponential(0)); // x.name should be string, no toExponential member
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~~~~~~~~~~~~~
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!!! Property 'toExponential' does not exist on type 'string'.
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thing.doSomething((x, y) => y.id.charAt(0));
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~~~~~~
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!!! Property 'charAt' does not exist on type 'number'.
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thing.doSomething((x, y) => y.name.toExponential(0));
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~~~~~~~~~~~~~
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!!! Property 'toExponential' does not exist on type 'string'.
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