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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [gcc/] [testsuite/] [g++.dg/] [template/] [sfinae21.C] - Rev 801

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// PR c++/44908

struct A { };

struct B
: public virtual A { };

template<bool, typename T = void> struct enable_if { typedef T type; };
template<typename T> struct enable_if<false, T> { };

template<typename From, typename To>
  class mini_is_convertible
  {
    typedef char one;
    typedef struct { char arr[2]; } two;

    template<typename To1>
      static void test_aux(To1);

    template<typename To1, typename From1>
      static typename
      enable_if<(sizeof(test_aux<To1>(From1()), 1) > 0), one>::type
      test(int);

    template<typename, typename>
      static two test(...);

    public:
      static const bool value = sizeof(test<To, From>(0)) == 1;
  }; 

template<typename From, typename To>
  const bool mini_is_convertible<From, To>::value;

int Test1[mini_is_convertible<int (B::*) (int),
          int (A::*) (int)>::value ? -1 : 1];
int Test2[mini_is_convertible<int (B::*), int (A::*)>::value ? -1 : 1];
int Test3[mini_is_convertible<int (A::*) (int),
          int (B::*) (int)>::value ? -1 : 1];
int Test4[mini_is_convertible<int (A::*), int (B::*)>::value ? -1 : 1];

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