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[SVN r40234]
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Joel de Guzman
2007-10-21 00:47:59 +00:00
parent fc57a566cb
commit 7a6e82b7cf
476 changed files with 0 additions and 25709 deletions
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61
include/boost/fusion/view/joint_view/joint_view.hpp
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/*=============================================================================
Copyright (c) 2001-2006 Joel de Guzman
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(FUSION_JOINT_VIEW_07162005_0140)
#define FUSION_JOINT_VIEW_07162005_0140
#include <boost/fusion/support/detail/access.hpp>
#include <boost/fusion/support/is_view.hpp>
#include <boost/fusion/sequence/intrinsic/begin.hpp>
#include <boost/fusion/sequence/intrinsic/end.hpp>
#include <boost/fusion/sequence/intrinsic/size.hpp>
#include <boost/fusion/view/joint_view/joint_view_iterator.hpp>
#include <boost/fusion/view/joint_view/detail/begin_impl.hpp>
#include <boost/fusion/view/joint_view/detail/end_impl.hpp>
#include <boost/fusion/support/sequence_base.hpp>
#include <boost/mpl/if.hpp>
#include <boost/mpl/plus.hpp>
#include <boost/mpl/bool.hpp>
namespace boost { namespace fusion
{
struct joint_view_tag;
struct forward_traversal_tag;
struct fusion_sequence_tag;
template <typename Sequence1, typename Sequence2>
struct joint_view : sequence_base<joint_view<Sequence1, Sequence2> >
{
typedef joint_view_tag fusion_tag;
typedef fusion_sequence_tag tag; // this gets picked up by MPL
typedef forward_traversal_tag category;
typedef mpl::true_ is_view;
typedef typename result_of::begin<Sequence1>::type first_type;
typedef typename result_of::end<Sequence1>::type last_type;
typedef typename result_of::begin<Sequence2>::type concat_type;
typedef typename result_of::end<Sequence2>::type concat_last_type;
typedef typename mpl::plus<result_of::size<Sequence1>, result_of::size<Sequence2> >::type size;
joint_view(Sequence1& seq1, Sequence2& seq2)
: seq1(seq1)
, seq2(seq2)
{}
first_type first() const { return fusion::begin(seq1); }
concat_type concat() const { return fusion::begin(seq2); }
concat_last_type concat_last() const { return fusion::end(seq2); }
private:
typename mpl::if_<traits::is_view<Sequence1>, Sequence1, Sequence1&>::type seq1;
typename mpl::if_<traits::is_view<Sequence2>, Sequence2, Sequence2&>::type seq2;
};
}}
#endif