set/aux_/item.hpp

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#ifndef BOOST_MPL_SET_AUX_ITEM_HPP_INCLUDED
#define BOOST_MPL_SET_AUX_ITEM_HPP_INCLUDED
 
// Copyright Aleksey Gurtovoy 2003-2007
// 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.
 
// $Id: item.hpp 13472 2017-08-22 07:53:44Z richean $
// $Date: 2017-08-22 09:53:44 +0200 (Di, 22 Aug 2017) $
// $Revision: 13472 $
 
#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 T           item_type_;
    typedef typename Base::item_ base;
    typedef s_item type;
    
    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 typename Base::item_ base;
    typedef typename prior< typename Base::size >::type  size;
    typedef s_mask type;
 
    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 typename Base::item_ 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