Chris@16: /*=============================================================================
Chris@16:     Copyright (c) 2009 Hartmut Kaiser
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: 
Chris@16: #if !defined(BOOST_FUSION_NVIEW_AT_IMPL_SEP_24_2009_0225PM)
Chris@16: #define BOOST_FUSION_NVIEW_AT_IMPL_SEP_24_2009_0225PM
Chris@16: 
Chris@101: #include <boost/fusion/support/config.hpp>
Chris@16: #include <boost/fusion/sequence/intrinsic/at.hpp>
Chris@16: 
Chris@101: namespace boost { namespace fusion
Chris@16: {
Chris@16:     struct nview_tag;
Chris@16: 
Chris@16:     namespace extension
Chris@16:     {
Chris@16:         template<typename Tag>
Chris@16:         struct at_impl;
Chris@16: 
Chris@16:         template<>
Chris@16:         struct at_impl<nview_tag>
Chris@16:         {
Chris@16:             template<typename Sequence, typename N>
Chris@16:             struct apply
Chris@16:             {
Chris@16:                 typedef typename Sequence::sequence_type sequence_type;
Chris@16:                 typedef typename Sequence::index_type index_type;
Chris@16: 
Chris@16:                 typedef typename result_of::at<index_type, N>::type index;
Chris@16:                 typedef typename result_of::at<sequence_type, index>::type type;
Chris@16: 
Chris@101:                 BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
Chris@101:                 static type
Chris@16:                 call(Sequence& seq)
Chris@16:                 {
Chris@16:                     return fusion::at<index>(seq.seq);
Chris@16:                 }
Chris@16:             };
Chris@16:         };
Chris@16:     }
Chris@16: 
Chris@16: }}
Chris@16: 
Chris@16: #endif