32 lines
2 KiB
Plaintext
32 lines
2 KiB
Plaintext
==== tests/cases/conformance/types/typeRelationships/assignmentCompatibility/genericCallWithObjectTypeArgsAndInitializers.ts (11 errors) ====
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// Generic typed parameters with initializers
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function foo<T>(x: T = null) { return x; } // ok
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function foo2<T>(x: T = undefined) { return x; } // ok
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function foo3<T extends Number>(x: T = 1) { } // error
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~~~~~~~~
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!!! Type 'number' is not assignable to type 'T'.
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function foo4<T, U extends T>(x: T, y: U = x) { } // error
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~~~~~~~~~~~
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!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
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~~~~~~~~
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!!! Type 'T' is not assignable to type 'U'.
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function foo5<T, U extends T>(x: U, y: T = x) { } // ok
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~~~~~~~~~~~
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!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
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~~~~~~~~
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!!! Type 'U' is not assignable to type 'T'.
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function foo6<T, U extends T, V extends U>(x: T, y: U, z: V = y) { } // error
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~~~~~~~~~~~
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!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
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~~~~~~~~~~~
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!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
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~~~~~~~~
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!!! Type 'U' is not assignable to type 'V'.
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function foo7<T, U extends T, V extends U>(x: V, y: U = x) { } // should be ok
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~~~~~~~~~~~
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!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
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~~~~~~~~~~~
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!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
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~~~~~~~~
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!!! Type 'V' is not assignable to type 'U'. |