/usr/include/CGAL/Algebraic_extension_traits.h is in libcgal-dev 4.2-5ubuntu1.
This file is owned by root:root, with mode 0o644.
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// 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; either version 3 of the License,
// or (at your option) any later version.
//
// 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.
//
// $URL$
// $Id$
//
//
// Author(s) : Michael Hemmer <hemmer@mpi-inf.mpg.de>
//
// =============================================================================
/*! \file CGAL/Algebraic_extension_traits.h
* \brief Defines traits class CGAL::Algebraic_extension_traits.
*/
#ifndef CGAL_ALGEBRAIC_NUMBER_TRAITS_H
#define CGAL_ALGEBRAIC_NUMBER_TRAITS_H 1
#include <numeric> // for std::accumulate
#include <functional> // for std::unary_function
#include <CGAL/tags.h>
#include <CGAL/Algebraic_structure_traits.h>
namespace CGAL {
template< class T >
class Algebraic_extension_traits {
public:
//! \name Typedefs
//! the number type for which this instance has been instantiated
typedef T Type;
//! standard number types are not extended
typedef CGAL::Tag_false Is_extended;
//! computes the factor which normalizes a number to be integral after
// multiplication
class Normalization_factor
: public std::unary_function<Type,Type> {
private:
static Type
normalization_factor(const Type&,Integral_domain_without_division_tag){
return Type(1);
}
static Type
normalization_factor(const Type& a, Field_tag){
return Type(1)/a;
}
public:
//! determine normalization factor
Type operator () (const Type& a) {
CGAL_precondition(a != Type(0));
typedef typename Algebraic_structure_traits<Type>::Algebraic_category
Tag;
return normalization_factor(a, Tag());
}
};
class Denominator_for_algebraic_integers
: public std::unary_function<Type,Type> {
public:
//! determine normalization factor
Type operator () (const Type&) {
return Type(1);
}
template <class InputIterator>
Type operator () (InputIterator, InputIterator) {
return Type(1);
}
};
};
} //namespace CGAL
#endif // NiX_ALGEBRAIC_NUMBER_TRAITS_H
// EOF
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