/*============================================================================= | |
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> | |
#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::plus<result_of::size<Sequence1>, result_of::size<Sequence2> >::type size; | |
joint_view(Sequence1& in_seq1, Sequence2& in_seq2) | |
: seq1(in_seq1) | |
, seq2(in_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: | |
// 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 | |