| /*============================================================================= |
| 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_ADVANCE_IMPL_14122005_2015) |
| #define FUSION_ADVANCE_IMPL_14122005_2015 |
| |
| #include <boost/fusion/iterator/advance.hpp> |
| #include <boost/mpl/negate.hpp> |
| |
| namespace boost { namespace fusion { |
| |
| struct reverse_view_iterator_tag; |
| |
| template <typename Iterator> |
| struct reverse_view_iterator; |
| |
| namespace extension |
| { |
| template<typename Tag> |
| struct advance_impl; |
| |
| template<> |
| struct advance_impl<reverse_view_iterator_tag> |
| { |
| template<typename Iterator, typename Dist> |
| struct apply |
| { |
| typedef typename Iterator::first_type first_type; |
| typedef typename mpl::negate<Dist>::type negative_dist; |
| typedef typename result_of::advance<first_type, negative_dist>::type advanced_type; |
| typedef reverse_view_iterator<advanced_type> type; |
| |
| static type |
| call(Iterator const& i) |
| { |
| return type(boost::fusion::advance<negative_dist>(i.first)); |
| } |
| }; |
| }; |
| } |
| }} |
| |
| #endif |