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47 lines
1.4 KiB
47 lines
1.4 KiB
3 years ago
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/*=============================================================================
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Copyright (c) 2001-2011 Joel de Guzman
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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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#if !defined(FUSION_BACK_09162005_0350)
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#define FUSION_BACK_09162005_0350
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#include <boost/fusion/support/config.hpp>
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#include <boost/fusion/sequence/intrinsic_fwd.hpp>
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#include <boost/fusion/sequence/intrinsic/end.hpp>
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#include <boost/fusion/iterator/prior.hpp>
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#include <boost/fusion/iterator/deref.hpp>
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#include <boost/mpl/bool.hpp>
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namespace boost { namespace fusion
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{
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struct fusion_sequence_tag;
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namespace result_of
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{
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template <typename Sequence>
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struct back
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: result_of::deref<typename result_of::prior<typename result_of::end<Sequence>::type>::type>
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{};
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}
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template <typename Sequence>
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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inline typename result_of::back<Sequence>::type
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back(Sequence& seq)
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{
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return *fusion::prior(fusion::end(seq));
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}
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template <typename Sequence>
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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inline typename result_of::back<Sequence const>::type
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back(Sequence const& seq)
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{
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return *fusion::prior(fusion::end(seq));
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}
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}}
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#endif
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