ceph/src/boost/libs/fusion/test/sequence/define_tpl_struct_inline_empty.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/detail/lightweight_test.hpp>
   9 #include <boost/fusion/container.hpp>
  10 #include <boost/fusion/sequence.hpp>
  11 #include <boost/fusion/sequence/io/out.hpp>
  12 #include <boost/fusion/iterator/equal_to.hpp>
  13 #include <boost/fusion/adapted/struct/define_struct_inline.hpp>
  14 #include <boost/mpl/assert.hpp>
  15 #include <boost/mpl/is_sequence.hpp>
  16 #include <boost/static_assert.hpp>
  17 #include <iostream>
  18
  19 BOOST_FUSION_DEFINE_TPL_STRUCT_INLINE((M), empty_struct, )
  20
  21 int
  22 main()
  23 {
  24     using namespace boost;
  25     using namespace boost::fusion;
  26
  27     std::cout << tuple_open('[');
  28     std::cout << tuple_close(']');
  29     std::cout << tuple_delimiter(", ");
  30
  31     {
  32         BOOST_MPL_ASSERT_NOT((traits::is_view<empty_struct<void> >));
  33         empty_struct<void>  e;
  34
  35         std::cout << e << std::endl;
  36         BOOST_TEST(e == make_vector());
  37
  38         BOOST_STATIC_ASSERT(fusion::result_of::size<empty_struct<void> >::value == 0);
  39         BOOST_STATIC_ASSERT(fusion::result_of::empty<empty_struct<void> >::value);
  40     }
  41
  42     {
  43         vector<> v;
  44         empty_struct<void>  e;
  45         BOOST_TEST(v == e);
  46         BOOST_TEST_NOT(v != e);
  47         BOOST_TEST_NOT(v < e);
  48         BOOST_TEST(v <= e);
  49         BOOST_TEST_NOT(v > e);
  50         BOOST_TEST(v >= e);
  51     }
  52
  53     {
  54         empty_struct<void>  e;
  55
  56         // conversion from empty_struct to vector
  57         vector<> v(e);
  58         v = e;
  59
  60         // conversion from empty_struct to list
  61         //list<> l(e);
  62         //l = e;
  63     }
  64
  65     { // begin/end
  66         typedef fusion::result_of::begin<empty_struct<void> >::type b;
  67         typedef fusion::result_of::end<empty_struct<void> >::type e;
  68
  69         BOOST_MPL_ASSERT((fusion::result_of::equal_to<b, e>));
  70     }
  71
  72     BOOST_MPL_ASSERT((mpl::is_sequence<empty_struct<void> >));
  73
  74     return boost::report_errors();
  75 }