/* Copyright (c) 1997-2010
   Ewgenij Gawrilow, Michael Joswig (Technische Universitaet Darmstadt, Germany)
   http://www.polymake.de

   This program is free software; you can redistribute it and/or modify it
   under the terms of the GNU General Public License as published by the
   Free Software Foundation; either version 2, or (at your option) any
   later version: http://www.gnu.org/licenses/gpl.txt.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
--------------------------------------------------------------------------------
   $Project: polymake $$Id: tree_iterators.h 9991 2010-12-12 23:36:28Z gawrilow $
*/

#ifndef POLYMAKE_INTERNAL_TREE_ITERATORS_H
#define POLYMAKE_INTERNAL_TREE_ITERATORS_H

#include "polymake/internal/iterators.h"

namespace pm {
#ifdef __GNUC__

template <typename Tp>
struct iterator_cross_const_helper< std::_Rb_tree_iterator<Tp>, true> {
   typedef std::_Rb_tree_iterator<Tp> iterator;
   typedef std::_Rb_tree_const_iterator<Tp> const_iterator;
};

template <typename Tp>
struct iterator_cross_const_helper< std::_Rb_tree_const_iterator<Tp>, true> {
   typedef std::_Rb_tree_iterator<Tp> iterator;
   typedef std::_Rb_tree_const_iterator<Tp> const_iterator;
};

#endif
}
#endif // POLYMAKE_INTERNAL_TREE_ITERATORS_H

// Local Variables:
// mode:C++
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// indent-tabs-mode:nil
// End:
