30 lines
1.1 KiB
Plaintext
30 lines
1.1 KiB
Plaintext
==== tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameterWithConstraints3.ts (7 errors) ====
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// checking whether other types are subtypes of type parameters with constraints
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function f<T extends U, U, V>(t: T, u: U, v: V) {
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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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// ok
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var r = true ? t : u;
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~~~~~~~~~~~~
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!!! No best common type exists between 'T' and 'U'.
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var r = true ? u : t;
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~~~~~~~~~~~~
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!!! No best common type exists between 'U' and 'T'.
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// error
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var r2 = true ? t : v;
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~~~~~~~~~~~~
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!!! No best common type exists between 'T' and 'V'.
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var r2 = true ? v : t;
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~~~~~~~~~~~~
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!!! No best common type exists between 'V' and 'T'.
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// error
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var r3 = true ? v : u;
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~~~~~~~~~~~~
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!!! No best common type exists between 'V' and 'U'.
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var r3 = true ? u : v;
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~~~~~~~~~~~~
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!!! No best common type exists between 'U' and 'V'.
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} |