| // PR c++/42623 | |
| // We should choose f(B) because f(A<undef>) involves applying sizeof to | |
| // an incomplete class, so it is removed by SFINAE. | |
| // { dg-do link } | |
| struct undef; | |
| template <typename U, int N = sizeof(U)> struct A { A(int); }; | |
| template <typename U> void f(A<U>); | |
| template <typename U> struct B { B(int) { } }; | |
| template <typename U> void f(B<U>) { } | |
| int main() | |
| { | |
| f<undef>(0); | |
| } |