mirror of https://github.com/CGAL/cgal
86 lines
2.0 KiB
C++
86 lines
2.0 KiB
C++
// TODO: Add licence
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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) : Michael Hemmer <mhemmer@uni-mainz.de>
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//
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// ============================================================================
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// This file is for backward compatibility
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// Rational_traits will be replaced by Fraction_traits
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#ifndef CGAL_RATIONAL_TRAITS_H
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#define CGAL_RATIONAL_TRAITS_H
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#include <CGAL/number_type_basic.h>
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#include <CGAL/Fraction_traits.h>
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CGAL_BEGIN_NAMESPACE
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namespace CGALi{
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template <class Rational, bool >
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struct Rational_traits_base
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{
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typedef Rational RT;
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const RT& numerator (const Rational& r) const { return r; }
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RT denominator (const Rational&) const { return RT(1); }
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Rational make_rational(const RT & n, const RT & d) const
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{ return n / d; }
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};
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template <class Rational>
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struct Rational_traits_base<Rational, true>
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{
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private:
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typedef Fraction_traits<Rational> FT;
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typedef typename FT::Decompose Decomose;
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typedef typename FT::Compose Compose;
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public:
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typedef typename FT::Numerator_type RT;
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RT numerator (const Rational& r) const {
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RT num,den;
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Decomose()(r,num,den);
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return num;
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}
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RT denominator (const Rational& r) const {
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RT num,den;
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Decomose()(r,num,den);
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return den;
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}
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Rational make_rational(const RT & n, const RT & d) const
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{ return Compose()(n,d); }
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Rational make_rational(const Rational & n, const Rational & d) const
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{ return n/d; }
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};
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}// namespace CGALi
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// use Fraction_traits if Is_fraction && Num and Den are the same
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template <class T>
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class Rational_traits
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: public CGALi::Rational_traits_base<T,
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::boost::is_same<typename Fraction_traits<T>::Is_fraction,Tag_true>::value
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&&
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::boost::is_same<
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typename Fraction_traits<T>::Numerator_type,
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typename Fraction_traits<T>::Denominator_type
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>::value >
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{};
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CGAL_END_NAMESPACE
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#endif // CGAL_RATIONAL_TRAITS_H
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// EOF
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