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- /*=============================================================================
- Copyright (c) 2001-2011 Joel de Guzman
- Copyright (c) 2005-2006 Dan Marsden
- 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_DISTANCE_IMPL_14122005_2104)
- #define FUSION_DISTANCE_IMPL_14122005_2104
- #include <boost/fusion/support/config.hpp>
- #include <boost/fusion/iterator/distance.hpp>
- namespace boost { namespace fusion {
- struct reverse_view_iterator_tag;
- template <typename Iterator>
- struct reverse_view_iterator;
- namespace extension
- {
- template<typename Tag>
- struct distance_impl;
- template<>
- struct distance_impl<reverse_view_iterator_tag>
- {
- template<typename First, typename Last>
- struct apply
- {
- typedef typename First::first_type first_type;
- typedef typename Last::first_type last_type;
- typedef typename result_of::distance<last_type, first_type>::type type;
- BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
- static type
- call(First const& first, Last const& last)
- {
- return boost::fusion::distance(last.first, first.first);
- }
- };
- };
- }
- }}
- #endif
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