boost/fusion/container/set/detail/as_set.hpp
/*=============================================================================
Copyright (c) 2014-2015 Kohei Takahashi
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)
==============================================================================*/
#ifndef FUSION_AS_SET_11062014_2121
#define FUSION_AS_SET_11062014_2121
#include <boost/fusion/support/config.hpp>
#include <boost/fusion/container/set/set_fwd.hpp>
///////////////////////////////////////////////////////////////////////////////
// Without variadics, we will use the PP version
///////////////////////////////////////////////////////////////////////////////
#if !defined(BOOST_FUSION_HAS_VARIADIC_SET)
# include <boost/fusion/container/set/detail/cpp03/as_set.hpp>
#else
///////////////////////////////////////////////////////////////////////////////
// C++11 interface
///////////////////////////////////////////////////////////////////////////////
#include <boost/fusion/support/detail/index_sequence.hpp>
#include <boost/fusion/container/set/set.hpp>
#include <boost/fusion/iterator/value_of.hpp>
#include <boost/fusion/iterator/deref.hpp>
#include <boost/fusion/iterator/advance.hpp>
#include <cstddef>
namespace boost { namespace fusion { namespace detail
{
BOOST_FUSION_BARRIER_BEGIN
template <int size
, typename = typename detail::make_index_sequence<size>::type>
struct as_set;
template <int size, std::size_t ...Indices>
struct as_set<size, detail::index_sequence<Indices...> >
{
template <typename I>
struct apply
{
typedef set<
typename result_of::value_of<
typename result_of::advance_c<I, Indices>::type
>::type...
> type;
};
template <typename Iterator>
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
static typename apply<Iterator>::type
call(Iterator const& i)
{
typedef apply<Iterator> gen;
typedef typename gen::type result;
return result(*advance_c<Indices>(i)...);
}
};
BOOST_FUSION_BARRIER_END
}}}
#endif
#endif
