| /*============================================================================= |
| Copyright (c) 2001-2006 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/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; |
| |
| static type |
| call(First const& first, Last const& last) |
| { |
| return boost::fusion::distance(last.first, first.first); |
| } |
| }; |
| }; |
| } |
| }} |
| |
| #endif |