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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_ADVANCE_IMPL_14122005_2015)
#define FUSION_ADVANCE_IMPL_14122005_2015
#include <boost/fusion/support/config.hpp>
#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;
BOOST_FUSION_GPU_ENABLED
static type
call(Iterator const& i)
{
return type(boost::fusion::advance<negative_dist>(i.first));
}
};
};
}
}}
#endif
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