Chris@16: /*=============================================================================
Chris@16:     Copyright (c) 2001-2011 Joel de Guzman
Chris@16: 
Chris@16:     Distributed under the Boost Software License, Version 1.0. (See accompanying 
Chris@16:     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
Chris@16: ==============================================================================*/
Chris@16: #if !defined(FUSION_NEXT_05042005_1101)
Chris@16: #define FUSION_NEXT_05042005_1101
Chris@16: 
Chris@101: #include <boost/fusion/support/config.hpp>
Chris@16: #include <boost/fusion/support/tag_of.hpp>
Chris@16: 
Chris@16: namespace boost { namespace fusion
Chris@16: {
Chris@16:     // Special tags:
Chris@16:     struct iterator_facade_tag; // iterator facade tag
Chris@16:     struct boost_array_iterator_tag; // boost::array iterator tag
Chris@16:     struct mpl_iterator_tag; // mpl sequence iterator tag
Chris@16:     struct std_pair_iterator_tag; // std::pair iterator tag
Chris@16: 
Chris@16:     namespace extension
Chris@16:     {
Chris@16:         template <typename Tag>
Chris@16:         struct next_impl
Chris@16:         {
Chris@16:             template <typename Iterator>
Chris@16:             struct apply {};
Chris@16:         };
Chris@16: 
Chris@16:         template <>
Chris@16:         struct next_impl<iterator_facade_tag>
Chris@16:         {
Chris@16:             template <typename Iterator>
Chris@16:             struct apply : Iterator::template next<Iterator> {};
Chris@16:         };
Chris@16: 
Chris@16:         template <>
Chris@16:         struct next_impl<boost_array_iterator_tag>;
Chris@16: 
Chris@16:         template <>
Chris@16:         struct next_impl<mpl_iterator_tag>;
Chris@16: 
Chris@16:         template <>
Chris@16:         struct next_impl<std_pair_iterator_tag>;
Chris@16:     }
Chris@16: 
Chris@16:     namespace result_of
Chris@16:     {
Chris@16:         template <typename Iterator>
Chris@16:         struct next
Chris@16:             : extension::next_impl<typename detail::tag_of<Iterator>::type>::
Chris@16:                 template apply<Iterator>
Chris@16:         {};
Chris@16:     }
Chris@16: 
Chris@16:     template <typename Iterator>
Chris@101:     BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
Chris@101:     inline typename result_of::next<Iterator>::type const
Chris@16:     next(Iterator const& i)
Chris@16:     {
Chris@16:         return result_of::next<Iterator>::call(i);
Chris@16:     }
Chris@16: }}
Chris@16: 
Chris@16: #endif