text: /*=============================================================================
      Copyright (c) 2016,2018 Kohei Takahashi
  
      Distributed under 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)
  ==============================================================================*/
  #include <boost/detail/lightweight_test.hpp>
  #include <boost/fusion/adapted/struct/define_assoc_struct.hpp>
  #include <utility>
  
  struct key_type;
  struct wrapper
  {
      int value;
  
      wrapper() : value(42) {}
      wrapper(wrapper&& other) : value(other.value) { other.value = 0; }
      wrapper(wrapper const& other) : value(other.value) {}
  
      wrapper& operator=(wrapper&& other) { value = other.value; other.value = 0; return *this; }
      wrapper& operator=(wrapper const& other) { value = other.value; return *this; }
  };
  BOOST_FUSION_DEFINE_ASSOC_STRUCT((ns), value, (wrapper, w, key_type))
  
  int main()
  {
      using namespace boost::fusion;
  
      {
          ns::value x;
          ns::value y(x); // copy
  
          BOOST_TEST(x.w.value == 42);
          BOOST_TEST(y.w.value == 42);
  
          ++y.w.value;
  
          BOOST_TEST(x.w.value == 42);
          BOOST_TEST(y.w.value == 43);
  
          y = x; // copy assign
  
          BOOST_TEST(x.w.value == 42);
          BOOST_TEST(y.w.value == 42);
      }
  
      {
          ns::value x;
          ns::value y(std::move(x)); // move
  
          BOOST_TEST(x.w.value == 0);
          BOOST_TEST(y.w.value == 42);
  
          ++y.w.value;
  
          BOOST_TEST(x.w.value == 0);
          BOOST_TEST(y.w.value == 43);
  
          y = std::move(x); // move assign
  
          BOOST_TEST(x.w.value == 0);
          BOOST_TEST(y.w.value == 0);
      }
  
      return boost::report_errors();
  }
  
  