109 lines
3.6 KiB
Plaintext
109 lines
3.6 KiB
Plaintext
/*=============================================================================
|
|
Copyright (c) 2001-2011 Joel de Guzman
|
|
Copyright (c) 2006 Dan Marsden
|
|
|
|
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_END_IMPL_20060123_2208)
|
|
#define FUSION_END_IMPL_20060123_2208
|
|
|
|
#include <boost/fusion/support/config.hpp>
|
|
#include <boost/fusion/view/zip_view/zip_view_iterator_fwd.hpp>
|
|
#include <boost/fusion/sequence/intrinsic/end.hpp>
|
|
#include <boost/fusion/sequence/intrinsic/begin.hpp>
|
|
#include <boost/fusion/sequence/intrinsic/size.hpp>
|
|
#include <boost/fusion/sequence/intrinsic/front.hpp>
|
|
#include <boost/fusion/iterator/advance.hpp>
|
|
#include <boost/fusion/algorithm/transformation/transform.hpp>
|
|
#include <boost/type_traits/remove_reference.hpp>
|
|
#include <boost/type_traits/is_reference.hpp>
|
|
#include <boost/mpl/assert.hpp>
|
|
#include <boost/mpl/min.hpp>
|
|
|
|
#include <boost/mpl/eval_if.hpp>
|
|
#include <boost/mpl/identity.hpp>
|
|
#include <boost/type_traits/is_same.hpp>
|
|
|
|
namespace boost { namespace fusion {
|
|
|
|
struct zip_view_tag;
|
|
|
|
namespace detail
|
|
{
|
|
template<typename SeqRef, typename M>
|
|
struct get_endpoint
|
|
{
|
|
typedef typename remove_reference<SeqRef>::type Seq;
|
|
typedef typename result_of::begin<Seq>::type begin;
|
|
typedef typename result_of::advance<begin, M>::type type;
|
|
};
|
|
|
|
template<typename M>
|
|
struct endpoints
|
|
{
|
|
template<typename T>
|
|
struct result;
|
|
|
|
template<typename M1, typename SeqRef>
|
|
struct result<endpoints<M1>(SeqRef)>
|
|
: mpl::eval_if<is_same<SeqRef, unused_type const&>,
|
|
mpl::identity<unused_type>,
|
|
get_endpoint<SeqRef, M> >
|
|
{
|
|
BOOST_MPL_ASSERT((is_reference<SeqRef>));
|
|
};
|
|
|
|
template<typename Seq>
|
|
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
|
|
typename result<endpoints(Seq&)>::type
|
|
operator()(Seq& seq) const
|
|
{
|
|
return fusion::advance<M>(fusion::begin(seq));
|
|
}
|
|
|
|
template<typename Seq>
|
|
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
|
|
typename result<endpoints(Seq const&)>::type
|
|
operator()(Seq const& seq) const
|
|
{
|
|
return fusion::advance<M>(fusion::begin(seq));
|
|
}
|
|
|
|
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
|
|
unused_type operator()(unused_type const&) const
|
|
{
|
|
return unused_type();
|
|
}
|
|
};
|
|
}
|
|
|
|
namespace extension
|
|
{
|
|
template<typename Tag>
|
|
struct end_impl;
|
|
|
|
template<>
|
|
struct end_impl<zip_view_tag>
|
|
{
|
|
template<typename Sequence>
|
|
struct apply
|
|
{
|
|
typedef zip_view_iterator<
|
|
typename result_of::transform<typename Sequence::sequences, detail::endpoints<typename Sequence::size> >::type,
|
|
typename Sequence::category> type;
|
|
|
|
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
|
|
static type
|
|
call(Sequence& sequence)
|
|
{
|
|
return type(
|
|
fusion::transform(sequence.sequences_, detail::endpoints<typename Sequence::size>()));
|
|
}
|
|
};
|
|
};
|
|
}
|
|
}}
|
|
|
|
#endif
|