Chris@16: /*=============================================================================
Chris@16:     Copyright (c) 2001-2011 Joel de Guzman
Chris@16: 
Chris@16:     Distributed under the Boost Software License, Version 1.0. (See accompanying 
Chris@16:     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
Chris@16: ==============================================================================*/
Chris@16: #if !defined(FUSION_BACK_09162005_0350)
Chris@16: #define FUSION_BACK_09162005_0350
Chris@16: 
Chris@101: #include <boost/fusion/support/config.hpp>
Chris@16: #include <boost/fusion/sequence/intrinsic_fwd.hpp>
Chris@16: #include <boost/fusion/sequence/intrinsic/end.hpp>
Chris@16: #include <boost/fusion/iterator/prior.hpp>
Chris@16: #include <boost/fusion/iterator/deref.hpp>
Chris@16: #include <boost/mpl/bool.hpp>
Chris@16: 
Chris@16: namespace boost { namespace fusion
Chris@16: {
Chris@16:     struct fusion_sequence_tag;
Chris@16: 
Chris@16:     namespace result_of
Chris@16:     {
Chris@16:         template <typename Sequence>
Chris@16:         struct back
Chris@16:             : result_of::deref<typename result_of::prior<typename result_of::end<Sequence>::type>::type>
Chris@16:         {};
Chris@16:     }
Chris@16:     
Chris@16:     template <typename Sequence>
Chris@101:     BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
Chris@16:     inline typename result_of::back<Sequence>::type
Chris@16:     back(Sequence& seq)
Chris@16:     {
Chris@16:         return *fusion::prior(fusion::end(seq));
Chris@16:     }
Chris@16: 
Chris@16:     template <typename Sequence>
Chris@101:     BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
Chris@16:     inline typename result_of::back<Sequence const>::type
Chris@16:     back(Sequence const& seq)
Chris@16:     {
Chris@16:         return *fusion::prior(fusion::end(seq));
Chris@16:     }
Chris@16: }}
Chris@16: 
Chris@16: #endif