| 1 | /*============================================================================= |
|---|---|
| 2 | Copyright (c) 2011 Eric Niebler |
| 3 | |
| 4 | Distributed under the Boost Software License, Version 1.0. (See accompanying |
| 5 | file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| 6 | ==============================================================================*/ |
| 7 | #if !defined(BOOST_FUSION_SEGMENTED_SEQUENCE_HPP_INCLUDED) |
| 8 | #define BOOST_FUSION_SEGMENTED_SEQUENCE_HPP_INCLUDED |
| 9 | |
| 10 | #include <boost/fusion/support/config.hpp> |
| 11 | #include <boost/mpl/bool.hpp> |
| 12 | #include <boost/type_traits/remove_reference.hpp> |
| 13 | #include <boost/fusion/support/tag_of.hpp> |
| 14 | #include <boost/fusion/sequence/intrinsic_fwd.hpp> |
| 15 | |
| 16 | namespace boost { namespace fusion { namespace detail |
| 17 | { |
| 18 | struct segment_sequence_tag {}; |
| 19 | |
| 20 | // Here, Sequence is a sequence of ranges (which may or may not be |
| 21 | // segmented). |
| 22 | template<typename Sequence> |
| 23 | struct segment_sequence |
| 24 | : sequence_base<segment_sequence<Sequence> > |
| 25 | { |
| 26 | typedef fusion_sequence_tag tag; |
| 27 | typedef segment_sequence_tag fusion_tag; |
| 28 | typedef typename Sequence::is_view is_view; |
| 29 | typedef typename Sequence::category category; |
| 30 | typedef Sequence sequence_type; |
| 31 | sequence_type sequence; |
| 32 | |
| 33 | BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED explicit segment_sequence(Sequence const & seq) |
| 34 | : sequence(seq) |
| 35 | {} |
| 36 | }; |
| 37 | } |
| 38 | |
| 39 | namespace extension |
| 40 | { |
| 41 | template<typename Tag> |
| 42 | struct is_segmented_impl; |
| 43 | |
| 44 | template<> |
| 45 | struct is_segmented_impl<detail::segment_sequence_tag> |
| 46 | { |
| 47 | template<typename Sequence> |
| 48 | struct apply |
| 49 | : mpl::true_ |
| 50 | {}; |
| 51 | }; |
| 52 | |
| 53 | template<typename Tag> |
| 54 | struct segments_impl; |
| 55 | |
| 56 | template<> |
| 57 | struct segments_impl<detail::segment_sequence_tag> |
| 58 | { |
| 59 | template<typename Sequence> |
| 60 | struct apply |
| 61 | { |
| 62 | typedef typename Sequence::sequence_type type; |
| 63 | |
| 64 | BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED |
| 65 | static type call(Sequence & seq) |
| 66 | { |
| 67 | return seq.sequence; |
| 68 | } |
| 69 | }; |
| 70 | }; |
| 71 | }}} |
| 72 | |
| 73 | #endif |
| 74 |