#ifndef BOOST_MPL_SET_AUX_ITEM_HPP_INCLUDED

#define BOOST_MPL_SET_AUX_ITEM_HPP_INCLUDED

// Copyright Aleksey Gurtovoy 2003-2004

// Copyright David Abrahams 2003-2004

//

// 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)

//

// See http://www.boost.org/libs/mpl for documentation.

// $Source: /cvsroot/boost/boost/boost/mpl/set/aux_/item.hpp,v $

// $Date: 2005/06/18 22:03:09 $

// $Revision: 1.7 $

#include <boost/mpl/long.hpp>

#include <boost/mpl/void.hpp>

#include <boost/mpl/next.hpp>

#include <boost/mpl/prior.hpp>

#include <boost/mpl/set/aux_/set0.hpp>

#include <boost/mpl/aux_/type_wrapper.hpp>

#include <boost/mpl/aux_/config/arrays.hpp>

namespace boost { namespace mpl {

template< typename T, typename Base >

struct s_item

    : Base

{

    typedef s_item<T,Base> item_;

    typedef void_       last_masked_;

    typedef Base        next_;

    typedef T           item_type_;

    typedef item_type_  type;

    typedef Base        base;

    typedef typename next< typename Base::size >::type  size;

    typedef typename next< typename Base::order >::type order;

#if defined(BOOST_MPL_CFG_NO_DEPENDENT_ARRAY_TYPES)

    typedef typename aux::weighted_tag<BOOST_MPL_AUX_MSVC_VALUE_WKND(order)::value>::type order_tag_;

#else

    typedef char (&order_tag_)[BOOST_MPL_AUX_MSVC_VALUE_WKND(order)::value];

#endif

    BOOST_MPL_AUX_SET_OVERLOAD( order_tag_, ORDER_BY_KEY, s_item, aux::type_wrapper<T>* );

    BOOST_MPL_AUX_SET_OVERLOAD( aux::no_tag, IS_MASKED, s_item, aux::type_wrapper<T>* );

};

template< typename T, typename Base >

struct s_mask

    : Base

{

    typedef s_mask<T,Base> item_;

    typedef T       last_masked_;

    typedef void_   item_type_;

    typedef Base    base;

    typedef typename prior< typename Base::size >::type  size;

    BOOST_MPL_AUX_SET_OVERLOAD( aux::yes_tag, IS_MASKED, s_mask, aux::type_wrapper<T>* );

};

template< typename T, typename Base >

struct s_unmask

    : Base

{

    typedef s_unmask<T,Base> item_;

    typedef void_   last_masked_;

    typedef T       item_type_;

    typedef Base    base;

    typedef typename next< typename Base::size >::type  size;

    BOOST_MPL_AUX_SET_OVERLOAD( aux::no_tag, IS_MASKED, s_unmask, aux::type_wrapper<T>* );

};

}}

#endif // BOOST_MPL_SET_AUX_ITEM_HPP_INCLUDED