gcc/testsuite/g++.dg/cpp0x/sfinae67.C

   1 // PR c++/84689
   2 // { dg-do compile { target c++11 } }
   3
   4 struct base {
   5   void operator()();
   6 };
   7
   8 struct a : base { };
   9 struct b : base { };
  10
  11 struct f : a, b {
  12   using a::operator();
  13   using b::operator();
  14 };
  15
  16 template <class T> auto g(int) -> decltype(T()());
  17 template <class T> auto g(...) -> int;
  18
  19 using type = decltype(g<f>(0));
  20 using type = int;