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// Copyright (c) 1997 Utrecht University (The Netherlands),
// ETH Zurich (Switzerland), Freie Universitaet Berlin (Germany),
// INRIA Sophia-Antipolis (France), Martin-Luther-University Halle-Wittenberg
// (Germany), Max-Planck-Institute Saarbruecken (Germany), RISC Linz (Austria),
// and Tel-Aviv University (Israel). All rights reserved.
//
// This file is part of CGAL (www.cgal.org); you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation; version 2.1 of the License.
// See the file LICENSE.LGPL distributed with CGAL.
//
// Licensees holding a valid commercial license may use this file in
// accordance with the commercial license agreement provided with the software.
//
// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
//
// $URL: svn+ssh://scm.gforge.inria.fr/svn/cgal/branches/CGAL-3.2-branch/Modifier/include/CGAL/Modifier_base.h $
// $Id: Modifier_base.h 28567 2006-02-16 14:30:13Z lsaboret $
//
//
// Author(s) : Lutz Kettner <kettner@inf.ethz.ch>
#ifndef CGAL_MODIFIER_BASE_H
#define CGAL_MODIFIER_BASE_H 1
CGAL_BEGIN_NAMESPACE
template <class R>
class Modifier_base {
// Abstract Base Class for protected internal access.
// It defines the common interface for all modifiers.
public:
typedef R Representation;
virtual void operator()( R& rep) = 0;
// Postcondition: `rep' is a valid representation.
virtual ~Modifier_base() {}
};
CGAL_END_NAMESPACE
#endif // CGAL_MODIFIER_BASE_H //
// EOF //
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