Chris@16: /*=============================================================================
Chris@16:     Copyright (c) 2011 Eric Niebler
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_SEGMENTED_SEQUENCE_HPP_INCLUDED)
Chris@16: #define BOOST_FUSION_SEGMENTED_SEQUENCE_HPP_INCLUDED
Chris@16: 
Chris@101: #include <boost/fusion/support/config.hpp>
Chris@16: #include <boost/mpl/bool.hpp>
Chris@16: #include <boost/type_traits/remove_reference.hpp>
Chris@16: #include <boost/fusion/support/tag_of.hpp>
Chris@16: #include <boost/fusion/sequence/intrinsic_fwd.hpp>
Chris@16: 
Chris@16: namespace boost { namespace fusion { namespace detail
Chris@16: {
Chris@16:     struct segment_sequence_tag {};
Chris@16: 
Chris@16:     // Here, Sequence is a sequence of ranges (which may or may not be
Chris@16:     // segmented).
Chris@16:     template<typename Sequence>
Chris@16:     struct segment_sequence
Chris@16:         : sequence_base<segment_sequence<Sequence> >
Chris@16:     {
Chris@16:         typedef fusion_sequence_tag tag;
Chris@16:         typedef segment_sequence_tag fusion_tag;
Chris@16:         typedef typename Sequence::is_view is_view;
Chris@16:         typedef typename Sequence::category category;
Chris@16:         typedef Sequence sequence_type;
Chris@16:         sequence_type sequence;
Chris@16: 
Chris@101:         BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED explicit segment_sequence(Sequence const & seq)
Chris@16:             : sequence(seq)
Chris@16:         {}
Chris@16:     };
Chris@16: }
Chris@16: 
Chris@16: namespace extension
Chris@16: {
Chris@16:     template<typename Tag>
Chris@16:     struct is_segmented_impl;
Chris@16: 
Chris@16:     template<>
Chris@16:     struct is_segmented_impl<detail::segment_sequence_tag>
Chris@16:     {
Chris@16:         template<typename Sequence>
Chris@16:         struct apply
Chris@16:             : mpl::true_
Chris@16:         {};
Chris@16:     };
Chris@16: 
Chris@16:     template<typename Tag>
Chris@16:     struct segments_impl;
Chris@16: 
Chris@16:     template<>
Chris@16:     struct segments_impl<detail::segment_sequence_tag>
Chris@16:     {
Chris@16:         template<typename Sequence>
Chris@16:         struct apply
Chris@16:         {
Chris@16:             typedef typename Sequence::sequence_type type;
Chris@16: 
Chris@101:             BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
Chris@16:             static type call(Sequence & seq)
Chris@16:             {
Chris@16:                 return seq.sequence;
Chris@16:             }
Chris@16:         };
Chris@16:     };
Chris@16: }}}
Chris@16: 
Chris@16: #endif