/*============================================================================= | |
Copyright (c) 2009 Christopher Schmidt | |
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) | |
==============================================================================*/ | |
#ifndef BOOST_FUSION_VIEW_REVERSE_VIEW_DETAIL_AT_IMPL_HPP | |
#define BOOST_FUSION_VIEW_REVERSE_VIEW_DETAIL_AT_IMPL_HPP | |
#include <boost/fusion/sequence/intrinsic/at.hpp> | |
#include <boost/mpl/minus.hpp> | |
#include <boost/mpl/int.hpp> | |
namespace boost { namespace fusion { namespace extension | |
{ | |
template <typename> | |
struct at_impl; | |
template <> | |
struct at_impl<reverse_view_tag> | |
{ | |
template <typename Seq, typename N> | |
struct apply | |
{ | |
typedef mpl::minus<typename Seq::size, mpl::int_<1>, N> real_n; | |
typedef typename | |
result_of::at<typename Seq::seq_type, real_n>::type | |
type; | |
static type | |
call(Seq& seq) | |
{ | |
return fusion::at<real_n>(seq.seq); | |
} | |
}; | |
}; | |
}}} | |
#endif |