text: /*=============================================================================
      Copyright (c) 2001-2011 Joel de Guzman
  
      Distributed under the Boost Software License, Version 1.0. (See accompanying
      file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
  ==============================================================================*/
  #if !defined(FUSION_ITERATOR_ADAPTER_08112011_0942)
  #define FUSION_ITERATOR_ADAPTER_08112011_0942
  
  #include <boost/fusion/support/config.hpp>
  #include <boost/fusion/support/category_of.hpp>
  #include <boost/fusion/iterator/advance.hpp>
  #include <boost/fusion/iterator/deref.hpp>
  #include <boost/fusion/iterator/distance.hpp>
  #include <boost/fusion/iterator/equal_to.hpp>
  #include <boost/fusion/iterator/iterator_facade.hpp>
  #include <boost/fusion/iterator/next.hpp>
  #include <boost/fusion/iterator/prior.hpp>
  #include <boost/fusion/iterator/value_of.hpp>
  #include <boost/type_traits/remove_const.hpp>
  
  namespace boost { namespace fusion
  {
      template <typename Derived_, typename Iterator_,
          typename Category = typename traits::category_of<Iterator_>::type>
      struct iterator_adapter
          : iterator_facade<Derived_, Category>
      {
          typedef typename
              remove_const<Iterator_>::type
          iterator_base_type;
          iterator_base_type iterator_base;
  
          BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
          iterator_adapter(iterator_base_type const& iterator_base_)
              : iterator_base(iterator_base_) {}
  
          // default implementation
          template <typename I1, typename I2>
          struct equal_to
              : result_of::equal_to<
                  typename I1::iterator_base_type
                , typename I2::iterator_base_type
              >
          {};
  
          // default implementation
          template <typename Iterator, typename N>
          struct advance
          {
              typedef typename Derived_::template make<
                  typename result_of::advance<
                      typename Iterator::iterator_base_type, N
                  >::type>::type
              type;
  
              BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
              static type
              call(Iterator const& it)
              {
                  return type(fusion::advance<N>(it.iterator_base));
              }
          };
  
          // default implementation
          template <typename First, typename Last>
          struct distance
              : result_of::distance<
                  typename First::iterator_base_type
                , typename Last::iterator_base_type
              >
          {};
  
          // default implementation
          template <typename Iterator>
          struct value_of
              : result_of::value_of<
                  typename Iterator::iterator_base_type
              >
          {};
  
          // default implementation
          template <typename Iterator>
          struct deref
          {
              typedef typename
                  result_of::deref<
                      typename Iterator::iterator_base_type
                  >::type
              type;
  
              BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
              static type
              call(Iterator const& it)
              {
                  return fusion::deref(it.iterator_base);
              }
          };
  
          // default implementation
          template <typename Iterator>
          struct next
          {
              typedef typename Derived_::template make<
                  typename result_of::next<
                      typename Iterator::iterator_base_type
                  >::type>::type
              type;
  
              BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
              static type
              call(Iterator const& i)
              {
                  return type(fusion::next(i.iterator_base));
              }
          };
  
          // default implementation
          template <typename Iterator>
          struct prior
          {
              typedef typename Derived_::template make<
                  typename result_of::prior<
                      typename Iterator::iterator_base_type
                  >::type>::type
              type;
  
              BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
              static type
              call(Iterator const& i)
              {
                  return type(fusion::prior(i.iterator_base));
              }
          };
      };
  }}
  
  #ifdef BOOST_FUSION_WORKAROUND_FOR_LWG_2408
  namespace std
  {
      template <typename Derived, typename Iterator, typename Category>
      struct iterator_traits< ::boost::fusion::iterator_adapter<Derived, Iterator, Category> >
      { };
  }
  #endif
  
  #endif
  