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131 lines
2.9 KiB
131 lines
2.9 KiB
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#ifndef BOOST_MPL_AUX_VECTOR_ITERATOR_HPP_INCLUDED
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#define BOOST_MPL_AUX_VECTOR_ITERATOR_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/vector/aux_/at.hpp>
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#include <boost/mpl/iterator_tags.hpp>
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#include <boost/mpl/plus.hpp>
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#include <boost/mpl/minus.hpp>
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#include <boost/mpl/advance_fwd.hpp>
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#include <boost/mpl/distance_fwd.hpp>
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#include <boost/mpl/next.hpp>
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#include <boost/mpl/prior.hpp>
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#include <boost/mpl/aux_/nttp_decl.hpp>
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#include <boost/mpl/aux_/value_wknd.hpp>
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#include <boost/mpl/aux_/config/ctps.hpp>
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#include <boost/mpl/aux_/config/workaround.hpp>
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namespace boost { namespace mpl {
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template<
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typename Vector
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, BOOST_MPL_AUX_NTTP_DECL(long, n_)
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>
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struct v_iter
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{
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typedef aux::v_iter_tag tag;
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typedef random_access_iterator_tag category;
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typedef typename v_at<Vector,n_>::type type;
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typedef Vector vector_;
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typedef mpl::long_<n_> pos;
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#if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
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enum {
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next_ = n_ + 1
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, prior_ = n_ - 1
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, pos_ = n_
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};
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typedef v_iter<Vector,next_> next;
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typedef v_iter<Vector,prior_> prior;
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#endif
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};
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#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
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template<
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typename Vector
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, BOOST_MPL_AUX_NTTP_DECL(long, n_)
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>
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struct next< v_iter<Vector,n_> >
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{
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typedef v_iter<Vector,(n_ + 1)> type;
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};
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template<
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typename Vector
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, BOOST_MPL_AUX_NTTP_DECL(long, n_)
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>
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struct prior< v_iter<Vector,n_> >
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{
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typedef v_iter<Vector,(n_ - 1)> type;
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};
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template<
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typename Vector
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, BOOST_MPL_AUX_NTTP_DECL(long, n_)
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, typename Distance
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>
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struct advance< v_iter<Vector,n_>,Distance>
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{
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typedef v_iter<
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Vector
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, (n_ + BOOST_MPL_AUX_NESTED_VALUE_WKND(long, Distance))
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> type;
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};
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template<
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typename Vector
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, BOOST_MPL_AUX_NTTP_DECL(long, n_)
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, BOOST_MPL_AUX_NTTP_DECL(long, m_)
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>
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struct distance< v_iter<Vector,n_>, v_iter<Vector,m_> >
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: mpl::long_<(m_ - n_)>
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{
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};
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#else // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
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template<> struct advance_impl<aux::v_iter_tag>
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{
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template< typename Iterator, typename N > struct apply
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{
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enum { pos_ = Iterator::pos_, n_ = N::value };
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typedef v_iter<
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typename Iterator::vector_
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, (pos_ + n_)
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> type;
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};
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};
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template<> struct distance_impl<aux::v_iter_tag>
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{
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template< typename Iter1, typename Iter2 > struct apply
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{
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enum { pos1_ = Iter1::pos_, pos2_ = Iter2::pos_ };
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typedef long_<( pos2_ - pos1_ )> type;
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BOOST_STATIC_CONSTANT(long, value = ( pos2_ - pos1_ ));
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};
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};
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#endif
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}}
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#endif // BOOST_MPL_AUX_VECTOR_ITERATOR_HPP_INCLUDED
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