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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_DEREF_IMPL_05042005_1037)
#define FUSION_DEREF_IMPL_05042005_1037
#include <boost/fusion/support/config.hpp>
#include <boost/mpl/at.hpp>
#include <boost/fusion/support/detail/access.hpp>
#include <boost/type_traits/is_const.hpp>
#include <boost/mpl/if.hpp>
namespace boost { namespace fusion
{
struct vector_iterator_tag;
namespace extension
{
template <typename Tag>
struct deref_impl;
template <>
struct deref_impl<vector_iterator_tag>
{
template <typename Iterator>
struct apply
{
typedef typename Iterator::vector vector;
typedef typename Iterator::index index;
typedef typename mpl::at<
typename vector::types, index>::type
element;
typedef typename
mpl::if_<
is_const<vector>
, typename fusion::detail::cref_result<element>::type
, typename fusion::detail::ref_result<element>::type
>::type
type;
BOOST_FUSION_GPU_ENABLED
static type
call(Iterator const& i)
{
return i.vec.at_impl(index());
}
};
};
}
}}
#endif
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