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170 lines
3.5 KiB
170 lines
3.5 KiB
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#ifndef BOOST_MPL_MAP_AUX_ITERATOR_HPP_INCLUDED
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#define BOOST_MPL_MAP_AUX_ITERATOR_HPP_INCLUDED
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// Copyright Aleksey Gurtovoy 2003-2004
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// Copyright David Abrahams 2003-2004
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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/map/aux_/map0.hpp>
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#include <boost/mpl/map/aux_/at_impl.hpp>
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#include <boost/mpl/map/aux_/tag.hpp>
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#include <boost/mpl/iterator_tags.hpp>
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#include <boost/mpl/if.hpp>
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#include <boost/mpl/next.hpp>
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#include <boost/mpl/deref.hpp>
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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/aux_/nttp_decl.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_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
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template<
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typename Map
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, long order
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, long max_order
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>
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struct next_order
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: if_<
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is_void_< typename item_by_order<Map,order>::type >
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, next_order<Map,(order+1),max_order>
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, long_<order>
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>::type
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{
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};
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template<
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typename Map
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, long max_order
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>
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struct next_order<Map,max_order,max_order>
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: long_<max_order>
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{
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};
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template< typename Map, long order, long max_order >
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struct m_iter
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{
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typedef forward_iterator_tag category;
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typedef typename item_by_order<Map,order>::type type;
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};
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template< typename Map, long max_order >
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struct m_iter<Map,max_order,max_order>
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{
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typedef forward_iterator_tag category;
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};
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template< typename Map, long order, long max_order >
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struct next< m_iter<Map,order,max_order> >
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{
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typedef m_iter<
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Map
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, next_order<Map,order+1,max_order>::value
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, max_order
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> type;
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};
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template< typename Map, long max_order >
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struct next< m_iter<Map,max_order,max_order> >
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{
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};
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#else
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template<
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typename Map
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, BOOST_MPL_AUX_NTTP_DECL(long, order)
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, BOOST_MPL_AUX_NTTP_DECL(long, max_order)
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>
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struct next_order;
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template<
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typename Map
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, BOOST_MPL_AUX_NTTP_DECL(long, order)
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, BOOST_MPL_AUX_NTTP_DECL(long, max_order)
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>
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struct next_order_impl
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: if_<
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is_void_< typename item_by_order<Map,order>::type >
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, next_order<Map,(order+1),max_order>
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, long_<order>
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>::type
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{
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};
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template<
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typename Map
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, BOOST_MPL_AUX_NTTP_DECL(long, order)
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, BOOST_MPL_AUX_NTTP_DECL(long, max_order)
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>
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struct next_order
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: if_c<
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(order != max_order)
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, next_order_impl<Map,order,max_order>
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, long_<order>
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>::type
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{
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};
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template<
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typename Map
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, BOOST_MPL_AUX_NTTP_DECL(long, order)
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, BOOST_MPL_AUX_NTTP_DECL(long, max_order)
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>
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struct m_iter;
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struct m_iter_empty_base {};
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template<
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typename Map
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, BOOST_MPL_AUX_NTTP_DECL(long, order)
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, BOOST_MPL_AUX_NTTP_DECL(long, max_order)
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>
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struct m_iter_base
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{
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typedef typename item_by_order<Map,order>::type type;
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typedef m_iter<
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Map
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, next_order<Map,order+1,max_order>::value
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, max_order
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> next;
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};
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template<
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typename Map
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, BOOST_MPL_AUX_NTTP_DECL(long, order)
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, BOOST_MPL_AUX_NTTP_DECL(long, max_order)
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>
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struct m_iter
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: if_c<
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(order == max_order)
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, m_iter_empty_base
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, m_iter_base<Map,order,max_order>
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>::type
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{
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typedef forward_iterator_tag category;
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};
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#endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
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}}
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#endif // BOOST_MPL_MAP_AUX_ITERATOR_HPP_INCLUDED
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