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

   1 /*=============================================================================
   2     Copyright (c) 2001-2011 Joel de Guzman
   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 #include <boost/detail/lightweight_test.hpp>
   8 #include <boost/fusion/container/map.hpp>
   9 #include <boost/fusion/container/vector/vector.hpp>
  10 #include <boost/fusion/container/generation/make_vector.hpp>
  11 #include <boost/fusion/view/iterator_range/iterator_range.hpp>
  12 #include <boost/fusion/sequence/comparison/equal_to.hpp>
  13 #include <boost/fusion/sequence/io/out.hpp>
  14 #include <boost/fusion/sequence/intrinsic/size.hpp>
  15 #include <boost/fusion/sequence/intrinsic/begin.hpp>
  16 #include <boost/fusion/sequence/intrinsic/has_key.hpp>
  17 #include <boost/fusion/iterator/advance.hpp>
  18 #include <boost/fusion/iterator/key_of.hpp>
  19 #include <boost/fusion/iterator/value_of_data.hpp>
  20 #include <boost/fusion/iterator/deref_data.hpp>
  21 #include <boost/mpl/vector_c.hpp>
  22 #include <boost/mpl/begin.hpp>
  23 #include <boost/mpl/next.hpp>
  24 #include <boost/mpl/assert.hpp>
  25 #include <boost/static_assert.hpp>
  26
  27 int
  28 main()
  29 {
  30     using namespace boost::fusion;
  31     namespace fusion = boost::fusion;
  32
  33     std::cout << tuple_open('[');
  34     std::cout << tuple_close(']');
  35     std::cout << tuple_delimiter(", ");
  36
  37     {
  38         char const* s = "Ruby";
  39         typedef vector<int, char, double, char const*> vector_type;
  40         vector_type vec(1, 'x', 3.3, s);
  41
  42         {
  43             typedef vector_iterator<vector_type, 1> i1t;
  44             typedef vector_iterator<vector_type, 3> i3t;
  45
  46             i1t i1(vec);
  47             i3t i3(vec);
  48
  49             typedef iterator_range<i1t, i3t> slice_t;
  50             slice_t slice(i1, i3);
  51             std::cout << slice << std::endl;
  52             BOOST_TEST((slice == make_vector('x', 3.3)));
  53             BOOST_STATIC_ASSERT(boost::fusion::result_of::size<slice_t>::value == 2);
  54         }
  55
  56         {
  57             typedef vector_iterator<vector_type, 0> i1t;
  58             typedef vector_iterator<vector_type, 0> i3t;
  59
  60             i1t i1(vec);
  61             i3t i3(vec);
  62
  63             typedef iterator_range<i1t, i3t> slice_t;
  64             slice_t slice(i1, i3);
  65             std::cout << slice << std::endl;
  66             BOOST_TEST(slice == make_vector());
  67             BOOST_STATIC_ASSERT(boost::fusion::result_of::size<slice_t>::value == 0);
  68         }
  69     }
  70
  71     {
  72         typedef boost::mpl::vector_c<int, 2, 3, 4, 5, 6> mpl_vec;
  73         typedef boost::mpl::begin<mpl_vec>::type it0;
  74         typedef boost::mpl::next<it0>::type it1;
  75         typedef boost::mpl::next<it1>::type it2;
  76         typedef boost::mpl::next<it2>::type it3;
  77
  78         it1 f;
  79         it3 l;
  80
  81         typedef iterator_range<it1, it3> slice_t;
  82         slice_t slice(f, l);
  83         std::cout << slice << std::endl;
  84         BOOST_TEST((slice == make_vector(3, 4)));
  85         BOOST_STATIC_ASSERT(boost::fusion::result_of::size<slice_t>::value == 2);
  86     }
  87
  88     {
  89         typedef map<pair<void,std::string>, pair<double,char>,pair<void*, int> > map_type;
  90         map_type m(make_pair<void>("foo"), make_pair<double>('x'), make_pair<void*>(2));
  91
  92         typedef iterator_range<
  93             boost::fusion::result_of::begin<map_type>::type
  94           , boost::fusion::result_of::advance_c<boost::fusion::result_of::begin<map_type>::type,2>::type
  95         > range_type;
  96         range_type r(begin(m), advance_c<2>(begin(m)));
  97
  98         BOOST_MPL_ASSERT((boost::fusion::result_of::has_key<range_type, void>::type));
  99         BOOST_MPL_ASSERT((boost::fusion::result_of::has_key<range_type, double>::type));
 100
 101         BOOST_MPL_ASSERT((boost::is_same<boost::fusion::result_of::key_of<boost::fusion::result_of::begin<range_type>::type>::type, void>));
 102         BOOST_MPL_ASSERT((boost::is_same<boost::fusion::result_of::key_of<boost::fusion::result_of::next<boost::fusion::result_of::begin<range_type>::type>::type>::type, double>));
 103
 104         BOOST_MPL_ASSERT((boost::is_same<boost::fusion::result_of::value_of_data<boost::fusion::result_of::begin<range_type>::type>::type, std::string>));
 105         BOOST_MPL_ASSERT((boost::is_same<boost::fusion::result_of::value_of_data<boost::fusion::result_of::next<boost::fusion::result_of::begin<range_type>::type>::type>::type, char>));
 106
 107         std::cout << deref_data(begin(r)) << std::endl;
 108         std::cout << deref_data(fusion::next(begin(r))) << std::endl;
 109         BOOST_TEST((deref_data(begin(r)) == "foo"));
 110         BOOST_TEST((deref_data(fusion::next(begin(r))) == 'x'));
 111     }
 112
 113     return boost::report_errors();
 114 }
 115