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// Copyright (c) 1999 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/Number_types/include/CGAL/Number_type_traits.h $
// $Id: Number_type_traits.h 28567 2006-02-16 14:30:13Z lsaboret $
//
//
// Author(s) : Susan Hert, Michael Hoffmann
#ifndef CGAL_NUMBER_TYPE_TRAITS_H
#define CGAL_NUMBER_TYPE_TRAITS_H
CGAL_BEGIN_NAMESPACE
template < class NT >
struct Number_type_traits {
typedef typename NT::Has_exact_ring_operations Has_exact_ring_operations;
typedef typename NT::Has_exact_division Has_exact_division;
typedef typename NT::Has_exact_sqrt Has_exact_sqrt;
typedef typename NT::Has_gcd Has_gcd;
typedef typename NT::Has_division Has_division;
typedef typename NT::Has_sqrt Has_sqrt;
};
template < class Rational >
struct Rational_traits {
typedef Rational RT;
const RT& numerator (const Rational& r) const { return r; }
RT denominator (const Rational&) const { return RT(1); }
Rational make_rational(const RT & n, const RT & d) const
{ return n / d; }
};
// number type tags
struct Ring_tag {};
struct Euclidean_ring_tag {};
struct Field_tag {};
struct Sqrt_field_tag {};
CGAL_END_NAMESPACE
#endif // CGAL_NUMBER_TYPE_TRAITS_H
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