16 lines
684 B
Plaintext
16 lines
684 B
Plaintext
==== tests/cases/compiler/typeParameterArgumentEquivalence2.ts (2 errors) ====
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function foo<T,U>() {
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var x: (item: U) => boolean;
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var y: (item: T) => boolean;
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x = y; // Should be an error
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~
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!!! Type '(item: T) => boolean' is not assignable to type '(item: U) => boolean':
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!!! Types of parameters 'item' and 'item' are incompatible:
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!!! Type 'T' is not assignable to type 'U'.
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y = x; // Shound be an error
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~
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!!! Type '(item: U) => boolean' is not assignable to type '(item: T) => boolean':
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!!! Types of parameters 'item' and 'item' are incompatible:
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!!! Type 'U' is not assignable to type 'T'.
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}
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