gcc/testsuite/g++.dg/cpp0x/sfinae59.C

   1 // PR c++/81359
   2 // { dg-do compile { target c++11 } }
   3
   4 template<typename _Tp, typename = decltype(_Tp())>
   5 static int test(int);
   6
   7 template<typename>
   8 static void test(...);
   9
  10 template <class T, class = decltype(test<T>(0))>
  11 struct A { };
  12
  13 struct B
  14 {
  15   struct C {
  16     int i = 0;
  17   };
  18   A<C> a;
  19 };