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