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104 lines
2.4 KiB
104 lines
2.4 KiB
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#ifndef BOOST_MPL_VECTOR_AUX_ITEM_HPP_INCLUDED
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#define BOOST_MPL_VECTOR_AUX_ITEM_HPP_INCLUDED
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// Copyright Aleksey Gurtovoy 2000-2004
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//
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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// See http://www.boost.org/libs/mpl for documentation.
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// $Id$
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// $Date$
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// $Revision$
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#include <boost/mpl/long.hpp>
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#include <boost/mpl/void.hpp>
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#include <boost/mpl/next_prior.hpp>
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#include <boost/mpl/aux_/type_wrapper.hpp>
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#include <boost/mpl/aux_/config/typeof.hpp>
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#include <boost/mpl/aux_/config/ctps.hpp>
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namespace boost { namespace mpl {
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#if defined(BOOST_MPL_CFG_TYPEOF_BASED_SEQUENCES)
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template<
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typename T
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, typename Base
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, int at_front = 0
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>
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struct v_item
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: Base
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{
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typedef typename Base::upper_bound_ index_;
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typedef typename next<index_>::type upper_bound_;
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typedef typename next<typename Base::size>::type size;
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typedef Base base;
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typedef v_item type;
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// agurt 10/sep/04: MWCW <= 9.3 workaround here and below; the compiler
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// breaks if using declaration comes _before_ the new overload
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static aux::type_wrapper<T> item_(index_);
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using Base::item_;
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};
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template<
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typename T
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, typename Base
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>
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struct v_item<T,Base,1>
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: Base
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{
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typedef typename prior<typename Base::lower_bound_>::type index_;
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typedef index_ lower_bound_;
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typedef typename next<typename Base::size>::type size;
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typedef Base base;
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typedef v_item type;
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static aux::type_wrapper<T> item_(index_);
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using Base::item_;
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};
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// "erasure" item
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template<
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typename Base
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, int at_front
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>
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struct v_mask
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: Base
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{
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typedef typename prior<typename Base::upper_bound_>::type index_;
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typedef index_ upper_bound_;
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typedef typename prior<typename Base::size>::type size;
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typedef Base base;
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typedef v_mask type;
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static aux::type_wrapper<void_> item_(index_);
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using Base::item_;
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};
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template<
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typename Base
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>
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struct v_mask<Base,1>
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: Base
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{
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typedef typename Base::lower_bound_ index_;
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typedef typename next<index_>::type lower_bound_;
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typedef typename prior<typename Base::size>::type size;
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typedef Base base;
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typedef v_mask type;
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static aux::type_wrapper<void_> item_(index_);
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using Base::item_;
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};
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#endif // BOOST_MPL_CFG_TYPEOF_BASED_SEQUENCES
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}}
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#endif // BOOST_MPL_VECTOR_AUX_ITEM_HPP_INCLUDED
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