/*============================================================================= | |
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 |