ceph/src/boost/libs/fusion/include/boost/fusion/view/reverse_view/reverse_view_iterator.hpp

   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 #if !defined(FUSION_REVERSE_VIEW_ITERATOR_07202005_0835)
   8 #define FUSION_REVERSE_VIEW_ITERATOR_07202005_0835
   9
  10 #include <boost/fusion/support/config.hpp>
  11 #include <boost/fusion/support/iterator_base.hpp>
  12 #include <boost/fusion/support/category_of.hpp>
  13 #include <boost/fusion/iterator/mpl/convert_iterator.hpp>
  14 #include <boost/fusion/adapted/mpl/mpl_iterator.hpp>
  15 #include <boost/fusion/view/reverse_view/detail/deref_impl.hpp>
  16 #include <boost/fusion/view/reverse_view/detail/next_impl.hpp>
  17 #include <boost/fusion/view/reverse_view/detail/prior_impl.hpp>
  18 #include <boost/fusion/view/reverse_view/detail/advance_impl.hpp>
  19 #include <boost/fusion/view/reverse_view/detail/distance_impl.hpp>
  20 #include <boost/fusion/view/reverse_view/detail/value_of_impl.hpp>
  21 #include <boost/fusion/view/reverse_view/detail/deref_data_impl.hpp>
  22 #include <boost/fusion/view/reverse_view/detail/value_of_data_impl.hpp>
  23 #include <boost/fusion/view/reverse_view/detail/key_of_impl.hpp>
  24 #include <boost/type_traits/is_base_of.hpp>
  25 #include <boost/static_assert.hpp>
  26
  27 namespace boost { namespace fusion
  28 {
  29     struct reverse_view_iterator_tag;
  30
  31     template <typename First>
  32     struct reverse_view_iterator
  33         : iterator_base<reverse_view_iterator<First> >
  34     {
  35         typedef convert_iterator<First> converter;
  36         typedef typename converter::type first_type;
  37         typedef reverse_view_iterator_tag fusion_tag;
  38         typedef typename traits::category_of<first_type>::type category;
  39
  40         BOOST_STATIC_ASSERT((
  41             is_base_of<
  42                 bidirectional_traversal_tag
  43               , category>::value));
  44
  45         BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
  46         reverse_view_iterator(First const& in_first)
  47             : first(converter::call(in_first)) {}
  48
  49         first_type first;
  50
  51     private:
  52         // silence MSVC warning C4512: assignment operator could not be generated
  53         reverse_view_iterator& operator= (reverse_view_iterator const&);
  54     };
  55 }}
  56
  57 #ifdef BOOST_FUSION_WORKAROUND_FOR_LWG_2408
  58 namespace std
  59 {
  60     template <typename First>
  61     struct iterator_traits< ::boost::fusion::reverse_view_iterator<First> >
  62     { };
  63 }
  64 #endif
  65
  66 #endif
  67