44 lines
1.3 KiB
Plaintext
44 lines
1.3 KiB
Plaintext
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/*=============================================================================
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Copyright (c) 2009 Christopher Schmidt
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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==============================================================================*/
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#ifndef BOOST_FUSION_VIEW_REVERSE_VIEW_DETAIL_AT_IMPL_HPP
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#define BOOST_FUSION_VIEW_REVERSE_VIEW_DETAIL_AT_IMPL_HPP
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#include <boost/fusion/support/config.hpp>
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#include <boost/fusion/sequence/intrinsic/at.hpp>
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#include <boost/mpl/minus.hpp>
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#include <boost/mpl/int.hpp>
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namespace boost { namespace fusion { namespace extension
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{
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template <typename>
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struct at_impl;
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template <>
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struct at_impl<reverse_view_tag>
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{
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template <typename Seq, typename N>
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struct apply
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{
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typedef mpl::minus<typename Seq::size, mpl::int_<1>, N> real_n;
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typedef typename
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result_of::at<typename Seq::seq_type, real_n>::type
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type;
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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static type
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call(Seq& seq)
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{
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return fusion::at<real_n>(seq.seq);
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}
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};
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};
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}}}
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#endif
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