ceph/src/boost/libs/fusion/test/sequence/define_struct_move.cpp

   1 /*=============================================================================
   2     Copyright (c) 2016 Kohei Takahashi
   3
   4     Distributed under the Boost Software License, Version 1.0. (See accompanying
   5     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   6 ==============================================================================*/
   7
   8 #include <boost/config.hpp>
   9 #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
  10
  11 #include <boost/detail/lightweight_test.hpp>
  12 #include <boost/fusion/adapted/struct/define_struct.hpp>
  13 #include <utility>
  14
  15 struct wrapper
  16 {
  17     int value;
  18
  19     wrapper() : value(42) {}
  20     wrapper(wrapper&& other) : value(other.value) { other.value = 0; }
  21     wrapper(wrapper const& other) : value(other.value) {}
  22
  23     wrapper& operator=(wrapper&& other) { value = other.value; other.value = 0; return *this; }
  24     wrapper& operator=(wrapper const& other) { value = other.value; return *this; }
  25 };
  26 BOOST_FUSION_DEFINE_STRUCT((ns), value, (wrapper, w))
  27
  28 int main()
  29 {
  30     using namespace boost::fusion;
  31
  32     {
  33         ns::value x;
  34         ns::value y(x); // copy
  35
  36         BOOST_TEST(x.w.value == 42);
  37         BOOST_TEST(y.w.value == 42);
  38
  39         ++y.w.value;
  40
  41         BOOST_TEST(x.w.value == 42);
  42         BOOST_TEST(y.w.value == 43);
  43
  44         y = x; // copy assign
  45
  46         BOOST_TEST(x.w.value == 42);
  47         BOOST_TEST(y.w.value == 42);
  48     }
  49
  50     {
  51         ns::value x;
  52         ns::value y(std::move(x)); // move
  53
  54         BOOST_TEST(x.w.value == 0);
  55         BOOST_TEST(y.w.value == 42);
  56
  57         ++y.w.value;
  58
  59         BOOST_TEST(x.w.value == 0);
  60         BOOST_TEST(y.w.value == 43);
  61
  62         y = std::move(x); // move assign
  63
  64         BOOST_TEST(x.w.value == 0);
  65         BOOST_TEST(y.w.value == 0);
  66     }
  67
  68     return boost::report_errors();
  69 }
  70
  71 #else
  72
  73 int main()
  74 {
  75 }
  76
  77 #endif