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71 lines
1.9 KiB
71 lines
1.9 KiB
/*============================================================================= |
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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/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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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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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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