| // PR c++/48451 | |
| // { dg-do compile { target c++11 } } | |
| namespace std { | |
| template <class T> T&& declval(); | |
| } | |
| template<class T, class... Args, | |
| class = decltype(T(std::declval<Args>()...)) | |
| > | |
| char f(int); | |
| struct From2Ints { From2Ints(int, int); }; | |
| static_assert(sizeof(f<From2Ints, int, int>(0)) == 1, "Error"); // b |