repetitive_view/detail/begin_impl.hpp

0001 /*=============================================================================
0002     Copyright (c) 2007 Tobias Schwinger
0003
0004     Distributed under the Boost Software License, Version 1.0. (See accompanying
0005     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
0006 ==============================================================================*/
0007
0008 #if !defined(BOOST_FUSION_REPETITIVE_VIEW_BEGIN_IMPL_HPP_INCLUDED)
0009 #define BOOST_FUSION_REPETITIVE_VIEW_BEGIN_IMPL_HPP_INCLUDED
0010
0011 #include <boost/fusion/support/config.hpp>
0012 #include <boost/fusion/sequence/intrinsic/begin.hpp>
0013 #include <boost/fusion/view/repetitive_view/repetitive_view_fwd.hpp>
0014
0015 namespace boost { namespace fusion
0016 {
0017     struct repetitive_view_tag;
0018
0019     template <typename Sequence, typename Pos>
0020     struct repetitive_view_iterator;
0021
0022     namespace extension
0023     {
0024         template<typename Tag>
0025         struct begin_impl;
0026
0027         template<>
0028         struct begin_impl<repetitive_view_tag>
0029         {
0030             template<typename View>
0031             struct apply
0032             {
0033                 typedef typename View::sequence_type sequence_type;
0034
0035                 typedef repetitive_view_iterator<sequence_type,
0036                     typename result_of::begin<sequence_type>::type > type;
0037
0038                 BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
0039                 static type call(View const& v)
0040                 {
0041                     return type(v.seq);
0042                 }
0043             };
0044         };
0045
0046     }
0047
0048 }}
0049
0050 #endif
0051