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Add regression test

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This commit is contained in:
Anders Hejlsberg
2018-04-02 09:23:00 -07:00
parent d093d6a1f8
commit ec02ccd575
1 changed files with 15 additions and 0 deletions
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15
tests/cases/conformance/types/conditional/conditionalTypes2.ts
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@@ -121,3 +121,18 @@ function foo<T>(value: T) {
toString2(value);
}
}
// Repro from #23052
type A<T, V, E> =
T extends object
? { [Q in { [P in keyof T]: T[P] extends V ? P : P; }[keyof T]]: A<T[Q], V, E>; }
: T extends V ? T : never;
type B<T, V> =
T extends object
? { [Q in { [P in keyof T]: T[P] extends V ? P : P; }[keyof T]]: B<T[Q], V>; }
: T extends V ? T : never;
type C<T, V, E> =
{ [Q in { [P in keyof T]: T[P] extends V ? P : P; }[keyof T]]: C<T[Q], V, E>; };