116 lines
4.2 KiB
C
116 lines
4.2 KiB
C
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// Copyright (c) 2006-2008 Max-Planck-Institute Saarbruecken (Germany).
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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 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; either version 3 of the License,
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// or (at your option) any later version.
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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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// SPDX-License-Identifier: LGPL-3.0+
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//
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//
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// Author(s) : Michael Hemmer <hemmer@mpi-inf.mpg.de>
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/*! \file NiX/LEDA/Coercion_traits.h
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* \brief Provides specializations of Coercion_traits for the LEDA number types.
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*/
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#ifndef CGAL_LEDA_COERCION_TRAITS_H
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#define CGAL_LEDA_COERCION_TRAITS_H
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#include <CGAL/number_type_basic.h>
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#ifdef CGAL_USE_LEDA
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#include <CGAL/LEDA_basic.h>
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#include <LEDA/numbers/integer.h>
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#include <LEDA/numbers/bigfloat.h>
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#include <LEDA/numbers/rational.h>
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#include <LEDA/numbers/real.h>
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namespace CGAL {
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//LEDA internal coercions:
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CGAL_DEFINE_COERCION_TRAITS_FROM_TO(::leda::integer,::leda::bigfloat)
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CGAL_DEFINE_COERCION_TRAITS_FROM_TO(::leda::integer,::leda::rational)
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CGAL_DEFINE_COERCION_TRAITS_FROM_TO(::leda::integer,::leda::real)
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// CGAL_DEFINE_COERCION_TRAITS_FROM_TO(::leda::bigfloat,::leda::rational); see below
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CGAL_DEFINE_COERCION_TRAITS_FROM_TO(::leda::bigfloat,::leda::real)
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CGAL_DEFINE_COERCION_TRAITS_FROM_TO(::leda::rational,::leda::real)
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// The following definitions reflect the interaction of the LEDA number types
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// with the built in types,
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// leda integer:
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CGAL_DEFINE_COERCION_TRAITS_FROM_TO(short ,::leda::integer)
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CGAL_DEFINE_COERCION_TRAITS_FROM_TO(int ,::leda::integer)
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CGAL_DEFINE_COERCION_TRAITS_FROM_TO(long ,::leda::integer)
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// leda rational:
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CGAL_DEFINE_COERCION_TRAITS_FROM_TO(short ,::leda::rational)
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CGAL_DEFINE_COERCION_TRAITS_FROM_TO(int ,::leda::rational)
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CGAL_DEFINE_COERCION_TRAITS_FROM_TO(long ,::leda::rational)
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CGAL_DEFINE_COERCION_TRAITS_FROM_TO(float ,::leda::rational)
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CGAL_DEFINE_COERCION_TRAITS_FROM_TO(double ,::leda::rational)
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CGAL_DEFINE_COERCION_TRAITS_FROM_TO(long double,::leda::rational)
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// leda bigfloat: :
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CGAL_DEFINE_COERCION_TRAITS_FROM_TO(short ,::leda::bigfloat)
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CGAL_DEFINE_COERCION_TRAITS_FROM_TO(int ,::leda::bigfloat)
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CGAL_DEFINE_COERCION_TRAITS_FROM_TO(long ,::leda::bigfloat)
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CGAL_DEFINE_COERCION_TRAITS_FROM_TO(float ,::leda::bigfloat)
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CGAL_DEFINE_COERCION_TRAITS_FROM_TO(double ,::leda::bigfloat)
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// leda real:
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CGAL_DEFINE_COERCION_TRAITS_FROM_TO(short ,::leda::real)
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CGAL_DEFINE_COERCION_TRAITS_FROM_TO(int ,::leda::real)
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CGAL_DEFINE_COERCION_TRAITS_FROM_TO(float ,::leda::real)
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CGAL_DEFINE_COERCION_TRAITS_FROM_TO(double ,::leda::real)
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//not provided by LEDA
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//Note that this is not symmetric to CORE
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//CGAL_DEFINE_COERCION_TRAITS_FROM_TO(long long,::leda::integer);
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//CGAL_DEFINE_COERCION_TRAITS_FROM_TO(long long,::leda::rational);
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//CGAL_DEFINE_COERCION_TRAITS_FROM_TO(long long ,::leda::bigfloat);
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//CGAL_DEFINE_COERCION_TRAITS_FROM_TO(long double,::leda::bigfloat);
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//CGAL_DEFINE_COERCION_TRAITS_FROM_TO(long ,::leda::real);
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//CGAL_DEFINE_COERCION_TRAITS_FROM_TO(long long ,::leda::real);
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//CGAL_DEFINE_COERCION_TRAITS_FROM_TO(long double,::leda::real);
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template <>
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struct Coercion_traits< ::leda::bigfloat ,::leda::rational >{
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typedef Tag_true Are_explicit_interoperable;
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typedef Tag_false Are_implicit_interoperable;
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typedef ::leda::rational Type;
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struct Cast{
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typedef Type result_type;
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Type operator()(const ::leda::rational& x) const { return x;}
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Type operator()(const ::leda::bigfloat& x) const {
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return x.to_rational();
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}
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};
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};
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template <> struct Coercion_traits< ::leda::rational, ::leda::bigfloat >
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:public Coercion_traits< ::leda::bigfloat , ::leda::rational >{};
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} //namespace CGAL
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#endif // CGAL_USE_LEDA
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#endif //CGAL_LEDA_COERCION_TRAITS_H
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//EOF
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