File: sfinae28.C

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gcc-arm-none-eabi 15%3A12.2.rel1-1
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// PR c++/50324
// { dg-do compile { target c++11 } }

struct complete { };
struct incomplete;

template<class T> auto f(T *) -> decltype(T{}) *;
template<class T> char f(T);

int main()
{
  complete *p = 0;
  static_assert(sizeof(f(p)) == sizeof(void*), "");
  incomplete *q = 0;
  static_assert(sizeof(f(q)) == 1u, "");
}