#ifndef BOOST_MPL_VECTOR_AUX_ITEM_HPP_INCLUDED #define BOOST_MPL_VECTOR_AUX_ITEM_HPP_INCLUDED // Copyright Aleksey Gurtovoy 2000-2004 // // 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 49267 2008-10-11 06:19:02Z agurtovoy $ // $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $ // $Revision: 49267 $ #include <boost/mpl/long.hpp> #include <boost/mpl/void.hpp> #include <boost/mpl/next_prior.hpp> #include <boost/mpl/aux_/type_wrapper.hpp> #include <boost/mpl/aux_/config/typeof.hpp> #include <boost/mpl/aux_/config/ctps.hpp> namespace boost { namespace mpl { #if defined(BOOST_MPL_CFG_TYPEOF_BASED_SEQUENCES) template< typename T , typename Base , int at_front = 0 > struct v_item : Base { typedef typename Base::upper_bound_ index_; typedef typename next<index_>::type upper_bound_; typedef typename next<typename Base::size>::type size; typedef Base base; typedef v_item type; // agurt 10/sep/04: MWCW <= 9.3 workaround here and below; the compiler // breaks if using declaration comes _before_ the new overload static aux::type_wrapper<T> item_(index_); using Base::item_; }; template< typename T , typename Base > struct v_item<T,Base,1> : Base { typedef typename prior<typename Base::lower_bound_>::type index_; typedef index_ lower_bound_; typedef typename next<typename Base::size>::type size; typedef Base base; typedef v_item type; static aux::type_wrapper<T> item_(index_); using Base::item_; }; // "erasure" item template< typename Base , int at_front > struct v_mask : Base { typedef typename prior<typename Base::upper_bound_>::type index_; typedef index_ upper_bound_; typedef typename prior<typename Base::size>::type size; typedef Base base; typedef v_mask type; static aux::type_wrapper<void_> item_(index_); using Base::item_; }; template< typename Base > struct v_mask<Base,1> : Base { typedef typename Base::lower_bound_ index_; typedef typename next<index_>::type lower_bound_; typedef typename prior<typename Base::size>::type size; typedef Base base; typedef v_mask type; static aux::type_wrapper<void_> item_(index_); using Base::item_; }; #endif // BOOST_MPL_CFG_TYPEOF_BASED_SEQUENCES }} #endif // BOOST_MPL_VECTOR_AUX_ITEM_HPP_INCLUDED