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/*=============================================================================
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_PRIOR_IMPL_SEP_24_2009_0142PM)
#define BOOST_FUSION_NVIEW_PRIOR_IMPL_SEP_24_2009_0142PM
#include <boost/fusion/support/config.hpp>
#include <boost/mpl/prior.hpp>
namespace boost { namespace fusion
{
struct nview_iterator_tag;
template <typename Sequence, typename Pos>
struct nview_iterator;
namespace extension
{
template <typename Tag>
struct prior_impl;
template <>
struct prior_impl<nview_iterator_tag>
{
template <typename Iterator>
struct apply
{
typedef typename Iterator::first_type::iterator_type first_type;
typedef typename Iterator::sequence_type sequence_type;
typedef nview_iterator<sequence_type,
typename mpl::prior<first_type>::type> type;
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
static type
call(Iterator const& i)
{
return type(i.seq);
}
};
};
}
}}
#endif
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