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/*=============================================================================
Copyright (c) 2001-2011 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/config.hpp>
#include <boost/fusion/view/joint_view/joint_view_fwd.hpp>
#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>
#include <boost/mpl/eval_if.hpp>
#include <boost/mpl/inherit.hpp>
#include <boost/mpl/identity.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 typename
mpl::eval_if<
mpl::and_<
traits::is_associative<Sequence1>
, traits::is_associative<Sequence2>
>
, mpl::inherit2<forward_traversal_tag,associative_tag>
, mpl::identity<forward_traversal_tag>
>::type
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::int_<
result_of::size<Sequence1>::value + result_of::size<Sequence2>::value>
size;
BOOST_FUSION_GPU_ENABLED
joint_view(Sequence1& in_seq1, Sequence2& in_seq2)
: seq1(in_seq1)
, seq2(in_seq2)
{}
BOOST_FUSION_GPU_ENABLED
first_type first() const { return fusion::begin(seq1); }
BOOST_FUSION_GPU_ENABLED
concat_type concat() const { return fusion::begin(seq2); }
BOOST_FUSION_GPU_ENABLED
concat_last_type concat_last() const { return fusion::end(seq2); }
private:
// silence MSVC warning C4512: assignment operator could not be generated
joint_view& operator= (joint_view const&);
typename mpl::if_<traits::is_view<Sequence1>, Sequence1, Sequence1&>::type seq1;
typename mpl::if_<traits::is_view<Sequence2>, Sequence2, Sequence2&>::type seq2;
};
}}
#endif
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Swift