ceph/src/boost/libs/fusion/test/sequence/define_tpl_struct_inline_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_inline.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
  27 namespace ns
  28 {
  29     BOOST_FUSION_DEFINE_TPL_STRUCT_INLINE((W), value, (W, w))
  30 }
  31
  32 int main()
  33 {
  34     using namespace boost::fusion;
  35
  36     {
  37         ns::value<wrapper> x;
  38         ns::value<wrapper> y(x); // copy
  39
  40         BOOST_TEST(x.w.value == 42);
  41         BOOST_TEST(y.w.value == 42);
  42
  43         ++y.w.value;
  44
  45         BOOST_TEST(x.w.value == 42);
  46         BOOST_TEST(y.w.value == 43);
  47
  48         y = x; // copy assign
  49
  50         BOOST_TEST(x.w.value == 42);
  51         BOOST_TEST(y.w.value == 42);
  52     }
  53
  54     // Older MSVCs don't generate move ctor by default.
  55 #if !(defined(RUNNING_ON_APPVEYOR) && BOOST_WORKAROUND(BOOST_MSVC, < 1900))
  56     {
  57         ns::value<wrapper> x;
  58         ns::value<wrapper> y(std::move(x)); // move
  59
  60         BOOST_TEST(x.w.value == 0);
  61         BOOST_TEST(y.w.value == 42);
  62
  63         ++y.w.value;
  64
  65         BOOST_TEST(x.w.value == 0);
  66         BOOST_TEST(y.w.value == 43);
  67
  68         y = std::move(x); // move assign
  69
  70         BOOST_TEST(x.w.value == 0);
  71         BOOST_TEST(y.w.value == 0);
  72     }
  73 #endif // !(appveyor && msvc < 14.0)
  74
  75     return boost::report_errors();
  76 }
  77
  78 #else
  79
  80 int main()
  81 {
  82 }
  83
  84 #endif