//  Copyright (c) 2001-2010 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_SPIRIT_ADAPT_CLASS_ATTRIBUTES_JAN_27_2010_1219PM)
#define BOOST_SPIRIT_ADAPT_CLASS_ATTRIBUTES_JAN_27_2010_1219PM

#if defined(_MSC_VER)
#pragma once
#endif

#include <boost/spirit/home/support/attributes.hpp>
#include <boost/spirit/home/support/container.hpp>
#include <boost/fusion/include/adapt_class.hpp>
#include <boost/utility/enable_if.hpp>

///////////////////////////////////////////////////////////////////////////////
// forward declaration only
namespace boost { namespace fusion { namespace extension 
{ 
    template <typename T, int N> struct class_member_proxy;
}}}

///////////////////////////////////////////////////////////////////////////////
// customization points allowing to use adapted classes with spirit
namespace boost { namespace spirit { namespace traits
{
    ///////////////////////////////////////////////////////////////////////////
    template <typename T, int N>
    struct is_container<fusion::extension::class_member_proxy<T, N> >
      : is_container<typename fusion::extension::class_member_proxy<T, N>::type>
    {};

    template <typename T, int N>
    struct container_value<fusion::extension::class_member_proxy<T, N> >
      : container_value<typename fusion::extension::class_member_proxy<T, N>::type>
    {};

    template <typename T, int N, typename Val>
    struct push_back_container<fusion::extension::class_member_proxy<T, N>, Val
      , typename enable_if<
            is_reference<typename fusion::extension::class_member_proxy<T, N>::type> 
        >::type>
    {
        static bool call(fusion::extension::class_member_proxy<T, N>& p, Val const& val)
        {
            typedef typename fusion::extension::class_member_proxy<T, N>::type type;
            return push_back((type)p, val);
        }
    };

    template <typename T, int N>
    struct container_iterator<fusion::extension::class_member_proxy<T, N> >
      : container_iterator<typename fusion::extension::class_member_proxy<T, N>::type>
    {};

    ///////////////////////////////////////////////////////////////////////////
    template <typename T, int N, typename Val>
    struct assign_to_attribute_from_value<
        fusion::extension::class_member_proxy<T, N>, Val>
    {
        static void 
        call(Val const& val, fusion::extension::class_member_proxy<T, N>& attr)
        {
            attr = val;
        }
    };

    ///////////////////////////////////////////////////////////////////////////
    template <typename T, int N>
    struct attribute_type<fusion::extension::class_member_proxy<T, N> > 
      : fusion::extension::class_member_proxy<T, N> 
    {};

    ///////////////////////////////////////////////////////////////////////////
    template <typename T, int N, typename Attribute>
    struct transform_attribute<
        fusion::extension::class_member_proxy<T, N>, Attribute
      , typename disable_if<
            is_reference<typename fusion::extension::class_member_proxy<T, N>::lvalue> 
        >::type>
    {
        typedef Attribute type;

        static Attribute 
        pre(fusion::extension::class_member_proxy<T, N>& val) 
        { 
            return val; 
        }
        static void 
        post(fusion::extension::class_member_proxy<T, N>& val
          , Attribute const& attr) 
        {
            val = attr;
        }
        static void 
        fail(fusion::extension::class_member_proxy<T, N>&) 
        {
        }
    };

    template <typename T, int N, typename Attribute>
    struct transform_attribute<
        fusion::extension::class_member_proxy<T, N>, Attribute
      , typename enable_if<
            is_reference<typename fusion::extension::class_member_proxy<T, N>::lvalue> 
        >::type>
    {
        typedef Attribute& type;

        static Attribute& 
        pre(fusion::extension::class_member_proxy<T, N>& val) 
        { 
            return val; 
        }
        static void 
        post(fusion::extension::class_member_proxy<T, N>&, Attribute const&) 
        {
        }
        static void 
        fail(fusion::extension::class_member_proxy<T, N>&) 
        {
        }
    };
}}}

#endif