// Copyright (c) 2003 Daniel Wallin and Arvid Norberg

// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:

// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
// ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
// TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
// PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
// SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
// ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
// ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE
// OR OTHER DEALINGS IN THE SOFTWARE.


#ifndef LUABIND_CONVERT_TO_LUA_HPP_INCLUDED
#define LUABIND_CONVERT_TO_LUA_HPP_INCLUDED

#include <luabind/config.hpp>
#include <luabind/detail/policy.hpp>

#include <boost/mpl/apply_wrap.hpp>
#include <boost/ref.hpp>

namespace luabind { namespace detail
{
    template<bool IsReferenceWrapper = false>
    struct unwrap_ref
    {
        template<class T>
        static const T& get(const T& r) { return r; }

        template<class T>
        struct apply
        {
            typedef T type;
        };
    };

    template<>
    struct unwrap_ref<true>
    {
        template<class T>
        static T& get(const boost::reference_wrapper<T>& r) { return r.get(); }

        template<class T>
        struct apply
        {
            typedef typename T::type& type;
        };
    };

    namespace mpl = boost::mpl;

    template<class T>
    void convert_to_lua(lua_State* L, const T& v)
    {
        typedef typename mpl::apply_wrap1<
            unwrap_ref<boost::is_reference_wrapper<T>::value>
          , T
        >::type value_type;

        typename mpl::apply_wrap2<default_policy,value_type,cpp_to_lua>::type converter;

        converter.apply(L, unwrap_ref<boost::is_reference_wrapper<T>::value>::get(v));
    }

    template<int Index, class T, class Policies>
    void convert_to_lua_p(lua_State* L, const T& v, const Policies&)
    {
        typedef typename mpl::apply_wrap1<
            unwrap_ref<boost::is_reference_wrapper<T>::value>
          , T
        >::type value_type;

        typedef typename find_conversion_policy<Index, Policies>::type converter_policy;
        typename mpl::apply_wrap2<converter_policy,value_type,cpp_to_lua>::type converter;

        converter.apply(L, unwrap_ref<boost::is_reference_wrapper<T>::value>::get(v));
    }
}}

#endif
