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_DEREF_IMPL_SEP_24_2009_0818AM)
Chris@16: #define BOOST_FUSION_NVIEW_DEREF_IMPL_SEP_24_2009_0818AM
Chris@16: 
Chris@101: #include <boost/fusion/support/config.hpp>
Chris@16: #include <boost/fusion/iterator/deref.hpp>
Chris@16: #include <boost/fusion/container/vector.hpp>
Chris@16: 
Chris@16: namespace boost { namespace fusion
Chris@16: {
Chris@16:     struct nview_iterator_tag;
Chris@16: 
Chris@16:     namespace extension
Chris@16:     {
Chris@16:         template<typename Tag>
Chris@16:         struct deref_impl;
Chris@16: 
Chris@16:         template<>
Chris@16:         struct deref_impl<nview_iterator_tag>
Chris@16:         {
Chris@16:             template<typename Iterator>
Chris@16:             struct apply
Chris@16:             {
Chris@16:                 typedef typename Iterator::first_type first_type;
Chris@16:                 typedef typename Iterator::sequence_type sequence_type;
Chris@16: 
Chris@16:                 typedef typename result_of::deref<first_type>::type index;
Chris@16:                 typedef typename result_of::at<
Chris@16:                     typename sequence_type::sequence_type, index>::type type;
Chris@16: 
Chris@101:                 BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
Chris@16:                 static type call(Iterator const& i)
Chris@16:                 {
Chris@16:                     return at<index>(i.seq.seq);
Chris@16:                 }
Chris@16:             };
Chris@16:         };
Chris@16: 
Chris@16:     }
Chris@16: 
Chris@16: }}
Chris@16: 
Chris@16: #endif
Chris@16: