| // DR 2369 |
| // { dg-do compile { target c++20 } } |
| |
| template <class T> struct Z { |
| typedef typename T::x xx; |
| }; |
| template <class T> concept C = requires { typename T::A; }; |
| template <C T> typename Z<T>::xx f(void *, T); // #1 |
| template <class T> void f(int, T); // #2 |
| struct A {} a; |
| struct ZZ { |
| template <class T, class = typename Z<T>::xx> operator T *(); |
| operator int(); |
| }; |
| int main() { |
| ZZ zz; |
| f(1, a); // OK, deduction fails for #1 because there is no conversion from int to void* |
| f(zz, 42); // OK, deduction fails for #1 because C<int> is not satisfied |
| } |
