text: //  (C) Copyright Frederic Bron 2009-2011.
  //  Use, modification and distribution are subject to the
  //  Boost Software License, Version 1.0. (See accompanying file
  //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
  
  #ifndef TT_HAS_BINARY_OPERATORS_HPP
  #define TT_HAS_BINARY_OPERATORS_HPP
  
  #if defined(__GNUC__) && (__GNUC__*10000 + __GNUC_MINOR__*100 + __GNUC_PATCHLEVEL__ > 40900)
  #pragma GCC diagnostic push
  #pragma GCC diagnostic ignored "-Wunused-function"
  #endif
  
  
  // test with one template parameter
  #define TEST_T(TYPE,RESULT) BOOST_CHECK_INTEGRAL_CONSTANT((::boost::BOOST_TT_TRAIT_NAME<TYPE>::value), RESULT)
  // test with one template parameter plus return value
  #define TEST_TR(TYPE,RET,RESULT) BOOST_CHECK_INTEGRAL_CONSTANT((::boost::BOOST_TT_TRAIT_NAME<TYPE,TYPE,RET>::value), RESULT)
  // test with two template parameters
  #define TEST_TT(TYPE1,TYPE2,RESULT) BOOST_CHECK_INTEGRAL_CONSTANT((::boost::BOOST_TT_TRAIT_NAME<TYPE1,TYPE2>::value), RESULT)
  // test with two template parameters plus return value
  #define TEST_TTR(TYPE1,TYPE2,RET,RESULT) BOOST_CHECK_INTEGRAL_CONSTANT((::boost::BOOST_TT_TRAIT_NAME<TYPE1,TYPE2,RET>::value), RESULT)
  
  namespace {
  
  struct without { };
  
  struct ret { };
  
  struct internal { ret operator BOOST_TT_TRAIT_OP (const internal&) const; };
  
  struct external { };
  inline ret operator BOOST_TT_TRAIT_OP (const external&, const external&) {  return ret();  }
  
  struct comma1_ret { };
  struct ret_with_comma1 { comma1_ret operator,(int); };
  
  struct internal_comma1 { ret_with_comma1 operator BOOST_TT_TRAIT_OP (const internal_comma1&) const; };
  
  struct external_comma1 { };
  ret_with_comma1 operator BOOST_TT_TRAIT_OP (const external_comma1&, const external_comma1&) { return ret_with_comma1(); }
  
  struct ret_with_comma2 { void operator,(int); };
  
  struct internal_comma2 { ret_with_comma2 operator BOOST_TT_TRAIT_OP (const internal_comma2&) const; };
  
  struct external_comma2 { };
  ret_with_comma2 operator BOOST_TT_TRAIT_OP (const external_comma2&, const external_comma2&){ return ret_with_comma2(); }
  
  struct returns_int { int operator BOOST_TT_TRAIT_OP (const returns_int&); };
  
  struct returns_void { void operator BOOST_TT_TRAIT_OP (const returns_void&); };
  
  struct returns_void_star { void *operator BOOST_TT_TRAIT_OP (const returns_void_star&); };
  
  struct returns_double { double operator BOOST_TT_TRAIT_OP (const returns_double&); };
  
  struct ret1 { };
  struct convertible_to_ret1 { operator ret1 () const; };
  struct returns_convertible_to_ret1 { convertible_to_ret1 operator BOOST_TT_TRAIT_OP (const returns_convertible_to_ret1&); };
  
  struct convertible_to_ret2 { };
  struct ret2 { ret2(const convertible_to_ret2); };
  struct returns_convertible_to_ret2 { convertible_to_ret2 operator BOOST_TT_TRAIT_OP (const returns_convertible_to_ret2&); };
  
  class Base1 { };
  class Derived1 : public Base1 { };
  
  bool operator BOOST_TT_TRAIT_OP (const Base1&, const Base1&) { return true; }
  
  class Base2 { };
  struct Derived2 : public Base2 {
     Derived2(int); // to check if it works with a class that is not default constructible
  };
  
  bool operator BOOST_TT_TRAIT_OP (const Derived2&, const Derived2&) { return true; }
  
  struct tag { };
  
  struct A { };
  struct B : public A { };
  
  struct C { };
  struct D { };
  inline bool operator BOOST_TT_TRAIT_OP (const C&, void*) { return true; }
  inline bool operator BOOST_TT_TRAIT_OP (void*, const D&) { return true; }
  inline bool operator BOOST_TT_TRAIT_OP (const C&, const D&) { return true; }
  
  struct private_op { private: void operator BOOST_TT_TRAIT_OP (const private_op&) {} };
  
  struct ambiguous_A 
  { 
  };
  inline bool operator BOOST_TT_TRAIT_OP (const ambiguous_A&, const ambiguous_A&) { return true; }
  struct ambiguous_B { operator ambiguous_A()const { return ambiguous_A(); } };
  
  //class internal_private { ret operator BOOST_TT_TRAIT_OP (const internal_private&) const; };
  
  void common() {
     TEST_T(void, false);
     TEST_TT(void, void, false);
     TEST_TTR(void, void, void, false);
     TEST_TTR(void, void, int, false);
  
     TEST_T(without, false);
     TEST_T(internal, true);
     TEST_T(external, true);
     TEST_T(internal_comma1, true);
     TEST_T(external_comma1, true);
     TEST_T(internal_comma2, true);
     TEST_T(external_comma2, true);
     TEST_T(returns_int, true);
     TEST_T(returns_void, true);
     TEST_T(returns_void_star, true);
     TEST_T(returns_double, true);
     TEST_T(returns_convertible_to_ret1, true);
     TEST_T(returns_convertible_to_ret2, true);
     TEST_T(Base1, true);
     TEST_T(Derived1, true);
     TEST_T(Base2, false);
     TEST_T(Derived2, true);
  
     TEST_TR(without, void, false);
     TEST_TR(without, bool, false);
     TEST_TR(internal, void, false);
     TEST_TR(internal, bool, false);
     TEST_TR(internal, ret, true);
     TEST_TR(internal_comma1, void, false);
     TEST_TR(internal_comma1, bool, false);
     TEST_TR(internal_comma1, ret_with_comma1, true);
     TEST_TR(internal_comma2, void, false);
     TEST_TR(internal_comma2, bool, false);
     TEST_TR(internal_comma2, ret_with_comma2, true);
     TEST_TR(external, void, false);
     TEST_TR(external, bool, false);
     TEST_TR(external, ret, true);
     TEST_TR(returns_int, void, false);
     TEST_TR(returns_int, bool, true);
     TEST_TR(returns_int, int, true);
     TEST_TR(returns_void, void, true);
     TEST_TR(returns_void, bool, false);
     TEST_TR(returns_void_star, bool, true);
     TEST_TR(returns_double, void, false);
     TEST_TR(returns_double, bool, true);
     TEST_TR(returns_double, double, true);
     TEST_TR(returns_convertible_to_ret1, void, false);
     TEST_TR(returns_convertible_to_ret1, ret1, true);
     TEST_TR(returns_convertible_to_ret2, ret2, true);
     TEST_TR(Base1, bool, true);
     TEST_TR(Derived1, bool, true);
     TEST_TR(Base2, bool, false);
     TEST_TR(Derived2, bool, true);
  // compile time error
  // TEST_T(internal_private, false);
  #if defined(BOOST_TT_HAS_ACCURATE_BINARY_OPERATOR_DETECTION)
  // There are some things that pass that wouldn't otherwise do so:
  #if !BOOST_WORKAROUND(BOOST_MSVC, < 1910)
     TEST_TR(private_op, bool, false);
     TEST_T(private_op, false);
  #endif
     TEST_TR(ambiguous_A, bool, true);
     TEST_T(ambiguous_A, true);
     TEST_TR(ambiguous_B, bool, true);
     TEST_T(ambiguous_B, true);
  #endif
  }
  
  }
  
  #if defined(__GNUC__) && (__GNUC__*10000 + __GNUC_MINOR__*100 + __GNUC_PATCHLEVEL__ > 40900)
  #pragma GCC diagnostic pop
  #endif
  
  #endif
  
  