mirror of https://github.com/CGAL/cgal
83 lines
2.1 KiB
C++
83 lines
2.1 KiB
C++
// Copyright (c) 1999 Utrecht University (The Netherlands),
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// ETH Zurich (Switzerland), Freie Universitaet Berlin (Germany),
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// INRIA Sophia-Antipolis (France), Martin-Luther-University Halle-Wittenberg
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// (Germany), Max-Planck-Institute Saarbruecken (Germany), RISC Linz (Austria),
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// and Tel-Aviv University (Israel). All rights reserved.
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//
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// This file is part of CGAL (www.cgal.org); you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public License as
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// published by the Free Software Foundation; version 2.1 of the License.
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// See the file LICENSE.LGPL 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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// Stefan Schirra
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#ifndef CGAL_FUNCTIONS_ON_ENUMS_H
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#define CGAL_FUNCTIONS_ON_ENUMS_H
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#include <CGAL/enum.h>
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#include <CGAL/Kernel/Same_uncertainty.h>
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CGAL_BEGIN_NAMESPACE
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template <class T>
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inline
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T
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opposite(const T& t)
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{ return -t; }
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inline
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Sign
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operator-(Sign o)
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{ return static_cast<Sign>( - static_cast<int>(o)); }
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inline
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Bounded_side
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opposite(Bounded_side bs)
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{ return static_cast<Bounded_side>( - static_cast<int>(bs)); }
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inline
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Angle
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opposite(Angle a)
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{ return static_cast<Angle>( - static_cast<int>(a)); }
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inline Sign operator* (Sign s1, Sign s2)
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{
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return static_cast<Sign> (static_cast<int> (s1) * static_cast<int> (s2));
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}
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#ifdef CGAL_CFG_MATCHING_BUG_5
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template < typename T, typename U >
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inline
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T enum_cast_bug(const U& u, const T*)
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{ return static_cast<T>(u); }
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template < typename T, typename U >
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inline
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typename Same_uncertainty<T,U>::type enum_cast(const U& u)
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{ return enum_cast_bug(u, (const T*)0); }
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#else
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template < typename T, typename U >
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inline
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T enum_cast(const U& u)
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{ return static_cast<T>(u); }
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#endif
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CGAL_END_NAMESPACE
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#endif // CGAL_FUNCTIONS_ON_ENUMS_H
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