| // PR c++/51047 | |
| // { dg-do compile { target c++11 } } | |
| template<typename T> T &&declval(); | |
| template<class T> decltype(declval<T>().x) f(T *); | |
| template<class T> char f(T); | |
| struct B1{ int x; }; | |
| struct B2{ int x; }; | |
| struct D : public B1, B2{}; | |
| struct S { int x; }; | |
| int main() | |
| { | |
| S *p = nullptr; | |
| static_assert(sizeof(f(p)) == sizeof(int), ""); | |
| D *q = nullptr; | |
| static_assert(sizeof(f(q)) == 1u, ""); | |
| } |