williamr@4: 
williamr@4: #ifndef BOOST_MPL_SET_AUX_ITEM_HPP_INCLUDED
williamr@4: #define BOOST_MPL_SET_AUX_ITEM_HPP_INCLUDED
williamr@4: 
williamr@4: // Copyright Aleksey Gurtovoy 2003-2004
williamr@4: // Copyright David Abrahams 2003-2004
williamr@4: //
williamr@4: // Distributed under the Boost Software License, Version 1.0. 
williamr@4: // (See accompanying file LICENSE_1_0.txt or copy at 
williamr@4: // http://www.boost.org/LICENSE_1_0.txt)
williamr@4: //
williamr@4: // See http://www.boost.org/libs/mpl for documentation.
williamr@4: 
williamr@4: // $Source: /cvsroot/boost/boost/boost/mpl/set/aux_/item.hpp,v $
williamr@4: // $Date: 2005/06/18 22:03:09 $
williamr@4: // $Revision: 1.7 $
williamr@4: 
williamr@4: #include <boost/mpl/long.hpp>
williamr@4: #include <boost/mpl/void.hpp>
williamr@4: #include <boost/mpl/next.hpp>
williamr@4: #include <boost/mpl/prior.hpp>
williamr@4: #include <boost/mpl/set/aux_/set0.hpp>
williamr@4: #include <boost/mpl/aux_/type_wrapper.hpp>
williamr@4: #include <boost/mpl/aux_/config/arrays.hpp>
williamr@4: 
williamr@4: namespace boost { namespace mpl {
williamr@4: 
williamr@4: template< typename T, typename Base >
williamr@4: struct s_item
williamr@4:     : Base
williamr@4: {
williamr@4:     typedef s_item<T,Base> item_;
williamr@4:     typedef void_       last_masked_;
williamr@4:     typedef Base        next_;
williamr@4:     typedef T           item_type_;
williamr@4:     typedef item_type_  type;
williamr@4:     typedef Base        base;
williamr@4:     
williamr@4:     typedef typename next< typename Base::size >::type  size;
williamr@4:     typedef typename next< typename Base::order >::type order;
williamr@4: 
williamr@4: #if defined(BOOST_MPL_CFG_NO_DEPENDENT_ARRAY_TYPES)
williamr@4:     typedef typename aux::weighted_tag<BOOST_MPL_AUX_MSVC_VALUE_WKND(order)::value>::type order_tag_;
williamr@4: #else
williamr@4:     typedef char (&order_tag_)[BOOST_MPL_AUX_MSVC_VALUE_WKND(order)::value];
williamr@4: #endif
williamr@4: 
williamr@4:     BOOST_MPL_AUX_SET_OVERLOAD( order_tag_, ORDER_BY_KEY, s_item, aux::type_wrapper<T>* );
williamr@4:     BOOST_MPL_AUX_SET_OVERLOAD( aux::no_tag, IS_MASKED, s_item, aux::type_wrapper<T>* );
williamr@4: };
williamr@4: 
williamr@4: 
williamr@4: template< typename T, typename Base >
williamr@4: struct s_mask
williamr@4:     : Base
williamr@4: {
williamr@4:     typedef s_mask<T,Base> item_;
williamr@4:     typedef T       last_masked_;
williamr@4:     typedef void_   item_type_;
williamr@4:     typedef Base    base;
williamr@4:     typedef typename prior< typename Base::size >::type  size;
williamr@4: 
williamr@4:     BOOST_MPL_AUX_SET_OVERLOAD( aux::yes_tag, IS_MASKED, s_mask, aux::type_wrapper<T>* );
williamr@4: };
williamr@4: 
williamr@4: 
williamr@4: template< typename T, typename Base >
williamr@4: struct s_unmask
williamr@4:     : Base
williamr@4: {
williamr@4:     typedef s_unmask<T,Base> item_;
williamr@4:     typedef void_   last_masked_;
williamr@4:     typedef T       item_type_;
williamr@4:     typedef Base    base;
williamr@4:     typedef typename next< typename Base::size >::type  size;
williamr@4: 
williamr@4:     BOOST_MPL_AUX_SET_OVERLOAD( aux::no_tag, IS_MASKED, s_unmask, aux::type_wrapper<T>* );
williamr@4: };
williamr@4: 
williamr@4: }}
williamr@4: 
williamr@4: #endif // BOOST_MPL_SET_AUX_ITEM_HPP_INCLUDED