mirror of https://github.com/CGAL/cgal
92 lines
2.4 KiB
C++
92 lines
2.4 KiB
C++
// Copyright (c) 2009 GeometryFactory
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// All rights reserved.
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//
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// This file is part of CGAL (www.cgal.org); you may redistribute it under
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// the terms of the Q Public License version 1.0.
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// See the file LICENSE.QPL distributed with CGAL.
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//
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// Licensees holding a valid commercial license may use this file in
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// accordance with the commercial license agreement provided with the software.
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//
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// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
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// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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//
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// $URL$
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// $Id$
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//
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//
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// Author(s) : Andreas Fabri
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#ifndef CGAL_PROPERTY_MAP_H
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#define CGAL_PROPERTY_MAP_H
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#include <boost/property_map.hpp>
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#include <boost/tuple/tuple.hpp>
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namespace CGAL {
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template <typename T>
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struct identity_property_map
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: public boost::put_get_helper<T,
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identity_property_map<T> >
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{
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typedef T key_type;
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typedef T value_type;
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typedef T reference;
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typedef boost::readable_property_map_tag category;
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inline value_type operator[](const key_type& v) const { return v; }
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};
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template <typename Pair>
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struct first_of_pair_property_map
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: public boost::put_get_helper<typename Pair::first_type,
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first_of_pair_property_map<Pair> >
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{
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typedef Pair key_type;
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typedef typename Pair::first_type value_type;
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typedef typename Pair::first_type& reference;
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typedef boost::read_write_property_map_tag category;
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inline value_type operator[](const key_type& v) const { return v.first; }
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inline reference operator[](const key_type& v) { return v.first; }
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};
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template <typename Tuple, int N>
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struct nth_of_tuple_property_map
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: public boost::put_get_helper<typename boost::tuples::element<N,Tuple>::type,
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nth_of_tuple_property_map<Tuple,N> >
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{
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typedef Tuple key_type;
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typedef typename boost::tuples::element<N,Tuple>::type value_type;
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typedef value_type& reference;
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typedef boost::read_write_property_map_tag category;
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};
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};
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namespace boost
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{
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template <typename Tuple, int N>
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typename boost::tuples::element<N,Tuple>::type
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get(CGAL::nth_of_tuple_property_map<Tuple,N> pm, const Tuple& k)
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{
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return get<N>(k);
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}
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template <typename Tuple, int N>
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void
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put(CGAL::nth_of_tuple_property_map<Tuple,N> pm, Tuple& k, const typename boost::tuples::element<N,Tuple>::type& v)
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{
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get<N>(k) = v;
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}
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}
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#endif // CGAL_PROPERTY_MAP_H
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