Chris@16: /*=============================================================================
Chris@16:     Copyright (c) 2001-2011 Joel de Guzman
Chris@16:     Copyright (c) 2005-2006 Dan Marsden
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(BOOST_FUSION_BEGIN_IMPL_31122005_1209)
Chris@16: #define BOOST_FUSION_BEGIN_IMPL_31122005_1209
Chris@16: 
Chris@101: #include <boost/fusion/support/config.hpp>
Chris@16: #include <boost/fusion/adapted/mpl/mpl_iterator.hpp>
Chris@16: #include <boost/mpl/begin.hpp>
Chris@16: #include <boost/type_traits/remove_const.hpp>
Chris@16: 
Chris@16: namespace boost { namespace fusion {
Chris@16:     
Chris@16:     struct mpl_sequence_tag;
Chris@16: 
Chris@16:     namespace extension
Chris@16:     {
Chris@16:         template <typename Tag>
Chris@16:         struct begin_impl;
Chris@16: 
Chris@16:         template <>
Chris@16:         struct begin_impl<mpl_sequence_tag>
Chris@16:         {
Chris@16:             template <typename Sequence>
Chris@16:             struct apply 
Chris@16:             {
Chris@16:                 typedef typename mpl::begin<
Chris@16:                     typename remove_const<Sequence>::type
Chris@16:                 >::type iterator;
Chris@16:                 typedef mpl_iterator<iterator> type;
Chris@16:                 
Chris@101:                 BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
Chris@16:                 static type
Chris@16:                 call(Sequence)
Chris@16:                 {
Chris@16:                     return type();
Chris@16:                 }
Chris@16:             };
Chris@16:         };
Chris@16:     }
Chris@16: }}
Chris@16: 
Chris@16: #endif