mirror of https://github.com/CGAL/cgal
80 lines
2.6 KiB
C++
80 lines
2.6 KiB
C++
// 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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//
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// =============================================================================
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// within this file FT ^= Fraction_traits<T>
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#include <cassert>
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#include <CGAL/to_rational.h>
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#include <CGAL/use.h>
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#ifndef CGAL_TEST_FRACTION_TRAITS_H
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#define CGAL_TEST_FRACTION_TRAITS_H
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namespace CGAL {
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template <class T>
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void test_fraction_traits(){
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typedef CGAL::Fraction_traits<T> FT;
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typedef typename FT::Type Type;
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typedef typename FT::Is_fraction Is_fraction;
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typedef typename FT::Numerator_type Num;
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typedef typename FT::Denominator_type Den;
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typedef typename FT::Common_factor Common_factor;
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typedef typename FT::Decompose Decompose;
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typedef typename FT::Compose Compose;
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CGAL_USE_TYPE(Is_fraction);
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CGAL_static_assertion( (::boost::is_same<Type,T>::value));
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CGAL_static_assertion( (::boost::is_same<Is_fraction,Tag_true>::value));
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CGAL_static_assertion(!(::boost::is_same<Common_factor,Null_functor>::value));
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CGAL_static_assertion(!(::boost::is_same<Decompose,Null_functor>::value));
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CGAL_static_assertion(!(::boost::is_same<Compose,Null_functor>::value));
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// Decompose
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Type frac = Type(7) / Type (5);
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Num num;
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Den den;
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Decompose()(frac,num,den);
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assert(num == Num(7));
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assert(den == Num(5));
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assert(frac == Compose()(num,den));
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// almost the same as gcd
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Common_factor common_factor;
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assert(common_factor(Den(0),Den(0)) == Den(0));
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assert(common_factor(Den(1),Den(0)) == Den(1));
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assert(common_factor(Den(-2),Den(0)) == Den(2));
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assert(common_factor(Den(0),Den(-2)) == Den(2));
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assert(common_factor(Den(12),Den(15)) == Den(3));
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assert(common_factor(Den(-12),Den(15)) == Den(3));
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assert(common_factor(Den(12),Den(-15)) == Den(3));
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assert(common_factor(Den(-12),Den(-15)) == Den(3));
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}
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} //namespace CGAL
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#endif // CGAL_TEST_FRACTION_TRAITS_H
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