You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
88 lines
2.7 KiB
88 lines
2.7 KiB
3 years ago
|
/*=============================================================================
|
||
|
|
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_NEXT_IMPL_20060124_2006)
|
||
|
|
#define FUSION_NEXT_IMPL_20060124_2006
|
||
|
|
|
||
|
|
#include <boost/fusion/support/config.hpp>
|
||
|
|
#include <boost/fusion/view/zip_view/zip_view_iterator_fwd.hpp>
|
||
|
|
#include <boost/fusion/iterator/next.hpp>
|
||
|
|
#include <boost/fusion/algorithm/transformation/transform.hpp>
|
||
|
|
#include <boost/fusion/support/unused.hpp>
|
||
|
|
#include <boost/mpl/eval_if.hpp>
|
||
|
|
#include <boost/mpl/identity.hpp>
|
||
|
|
#include <boost/type_traits/is_same.hpp>
|
||
|
|
#include <boost/type_traits/remove_reference.hpp>
|
||
|
|
#include <boost/type_traits/remove_const.hpp>
|
||
|
|
|
||
|
|
namespace boost { namespace fusion {
|
||
|
|
|
||
|
|
struct zip_view_iterator_tag;
|
||
|
|
|
||
|
|
namespace detail
|
||
|
|
{
|
||
|
|
struct poly_next
|
||
|
|
{
|
||
|
|
template<typename Sig>
|
||
|
|
struct result;
|
||
|
|
|
||
|
|
template<typename It>
|
||
|
|
struct result<poly_next(It)>
|
||
|
|
{
|
||
|
|
typedef typename remove_const<
|
||
|
|
typename remove_reference<It>::type>::type it;
|
||
|
|
|
||
|
|
typedef typename mpl::eval_if<is_same<it, unused_type>,
|
||
|
|
mpl::identity<unused_type>,
|
||
|
|
result_of::next<it> >::type type;
|
||
|
|
};
|
||
|
|
|
||
|
|
template<typename It>
|
||
|
|
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
|
||
|
|
typename result<poly_next(It)>::type
|
||
|
|
operator()(const It& it) const
|
||
|
|
{
|
||
|
|
return fusion::next(it);
|
||
|
|
}
|
||
|
|
|
||
|
|
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
|
||
|
|
unused_type operator()(unused_type const&) const
|
||
|
|
{
|
||
|
|
return unused_type();
|
||
|
|
}
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
namespace extension
|
||
|
|
{
|
||
|
|
template<typename Tag>
|
||
|
|
struct next_impl;
|
||
|
|
|
||
|
|
template<>
|
||
|
|
struct next_impl<zip_view_iterator_tag>
|
||
|
|
{
|
||
|
|
template<typename Iterator>
|
||
|
|
struct apply
|
||
|
|
{
|
||
|
|
typedef fusion::zip_view_iterator<
|
||
|
|
typename result_of::transform<typename Iterator::iterators, detail::poly_next>::type,
|
||
|
|
typename Iterator::category> type;
|
||
|
|
|
||
|
|
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
|
||
|
|
static type
|
||
|
|
call(Iterator const& it)
|
||
|
|
{
|
||
|
|
return type(
|
||
|
|
fusion::transform(it.iterators_, detail::poly_next()));
|
||
|
|
}
|
||
|
|
};
|
||
|
|
};
|
||
|
|
}
|
||
|
|
}}
|
||
|
|
|
||
|
|
#endif
|