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74 lines
2.1 KiB
74 lines
2.1 KiB
3 years ago
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/*=============================================================================
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Copyright (c) 2011 Eric Niebler
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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==============================================================================*/
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#if !defined(BOOST_FUSION_SEGMENTED_SEQUENCE_HPP_INCLUDED)
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#define BOOST_FUSION_SEGMENTED_SEQUENCE_HPP_INCLUDED
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#include <boost/fusion/support/config.hpp>
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#include <boost/mpl/bool.hpp>
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#include <boost/type_traits/remove_reference.hpp>
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#include <boost/fusion/support/tag_of.hpp>
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#include <boost/fusion/sequence/intrinsic_fwd.hpp>
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namespace boost { namespace fusion { namespace detail
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{
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struct segment_sequence_tag {};
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// Here, Sequence is a sequence of ranges (which may or may not be
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// segmented).
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template<typename Sequence>
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struct segment_sequence
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: sequence_base<segment_sequence<Sequence> >
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{
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typedef fusion_sequence_tag tag;
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typedef segment_sequence_tag fusion_tag;
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typedef typename Sequence::is_view is_view;
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typedef typename Sequence::category category;
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typedef Sequence sequence_type;
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sequence_type sequence;
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED explicit segment_sequence(Sequence const & seq)
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: sequence(seq)
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{}
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};
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}
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namespace extension
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{
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template<typename Tag>
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struct is_segmented_impl;
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template<>
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struct is_segmented_impl<detail::segment_sequence_tag>
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{
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template<typename Sequence>
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struct apply
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: mpl::true_
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{};
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};
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template<typename Tag>
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struct segments_impl;
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template<>
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struct segments_impl<detail::segment_sequence_tag>
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{
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template<typename Sequence>
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struct apply
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{
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typedef typename Sequence::sequence_type type;
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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static type call(Sequence & seq)
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{
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return seq.sequence;
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}
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};
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};
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}}}
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#endif
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