51 lines
1.5 KiB
C++
51 lines
1.5 KiB
C++
|
/*=============================================================================
|
||
|
|
Copyright (c) 2009 Hartmut Kaiser
|
||
|
|
|
||
|
|
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(BOOST_FUSION_NVIEW_DEREF_IMPL_SEP_24_2009_0818AM)
|
||
|
|
#define BOOST_FUSION_NVIEW_DEREF_IMPL_SEP_24_2009_0818AM
|
||
|
|
|
||
|
|
#include <boost/fusion/support/config.hpp>
|
||
|
|
#include <boost/fusion/iterator/value_of.hpp>
|
||
|
|
#include <boost/fusion/sequence/intrinsic/at.hpp>
|
||
|
|
|
||
|
|
namespace boost { namespace fusion
|
||
|
|
{
|
||
|
|
struct nview_iterator_tag;
|
||
|
|
|
||
|
|
namespace extension
|
||
|
|
{
|
||
|
|
template<typename Tag>
|
||
|
|
struct deref_impl;
|
||
|
|
|
||
|
|
template<>
|
||
|
|
struct deref_impl<nview_iterator_tag>
|
||
|
|
{
|
||
|
|
template<typename Iterator>
|
||
|
|
struct apply
|
||
|
|
{
|
||
|
|
typedef typename Iterator::first_type first_type;
|
||
|
|
typedef typename Iterator::sequence_type sequence_type;
|
||
|
|
|
||
|
|
typedef typename result_of::value_of<first_type>::type index;
|
||
|
|
typedef typename result_of::at<
|
||
|
|
typename sequence_type::sequence_type, index>::type type;
|
||
|
|
|
||
|
|
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
|
||
|
|
static type call(Iterator const& i)
|
||
|
|
{
|
||
|
|
return at<index>(i.seq.seq);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
};
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
}}
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|