/*=============================================================================
    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_CONVERT_MAIN_09232005_1340)
#define FUSION_CONVERT_MAIN_09232005_1340

#include <boost/fusion/support/config.hpp>
#include <boost/fusion/container/map/map.hpp>

namespace boost {
namespace fusion {
namespace detail {
template <typename It, bool is_assoc>
struct pair_from
{
    typedef typename result_of::value_of<It>::type type;

    BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
    static inline type
    call(It const& it)
    {
        return *it;
    }
};

template <typename It>
struct pair_from<It, true>
{
    typedef typename result_of::key_of<It>::type key_type;
    typedef typename result_of::value_of_data<It>::type data_type;
    typedef typename fusion::pair<key_type, data_type> type;

    BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
    static inline type
    call(It const& it)
    {
        return type(deref_data(it));
    }
};
}
}
}

///////////////////////////////////////////////////////////////////////////////
// Without variadics, we will use the PP version
///////////////////////////////////////////////////////////////////////////////
#if !defined(BOOST_FUSION_HAS_VARIADIC_MAP)
# include <boost/fusion/container/map/detail/cpp03/convert.hpp>

#else
///////////////////////////////////////////////////////////////////////////////
// C++11 variadic implementation
///////////////////////////////////////////////////////////////////////////////
#include <boost/fusion/container/map/detail/build_map.hpp>

namespace boost {
namespace fusion {
namespace result_of {
template <typename Sequence>
struct as_map :
    detail::build_map<
    typename result_of::begin<Sequence>::type
    , typename result_of::end<Sequence>::type
    , is_base_of<
    associative_tag
    , typename traits::category_of<Sequence>::type>::value
    >
{
};
}

template <typename Sequence>
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
inline typename result_of::as_map<Sequence>::type
as_map(Sequence& seq)
{
    typedef result_of::as_map<Sequence> gen;
    return gen::call(fusion::begin(seq), fusion::end(seq));
}

template <typename Sequence>
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
inline typename result_of::as_map<Sequence const>::type
as_map(Sequence const& seq)
{
    typedef result_of::as_map<Sequence const> gen;
    return gen::call(fusion::begin(seq), fusion::end(seq));
}

namespace extension {
template <typename T>
struct convert_impl;

template <>
struct convert_impl<map_tag>
{
    template <typename Sequence>
    struct apply
    {
        typedef typename
        result_of::as_map<Sequence>::type
        type;

        BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
        static type
        call(Sequence& seq)
        {
            typedef result_of::as_map<Sequence> gen;
            return gen::call(fusion::begin(seq), fusion::end(seq));
        }
    };
};
}
}
}

#endif
#endif
