109 lines
2.5 KiB
C++
Executable File
109 lines
2.5 KiB
C++
Executable File
// Copyright (c) 2001-2006 INRIA Sophia-Antipolis (France).
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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) : Sylvain Pion
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#ifndef CGAL_NT_CONVERTER_H
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#define CGAL_NT_CONVERTER_H
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#include <functional>
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#include <CGAL/number_type_config.h>
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#include <CGAL/number_utils.h>
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template <bool> class Interval_nt;
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namespace CGAL {
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// A number type converter usable as default, using the conversion operator.
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template < class NT1, class NT2 >
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struct NT_converter
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: public CGAL::cpp98::unary_function< NT1, NT2 >
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{
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NT2
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operator()(const NT1 &a) const
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{
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return NT2(a);
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}
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};
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// Some specializations for :
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// - double to call to_double().
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// - Interval_nt<> to call to_interval().
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// - NT1 == NT2 to return a reference instead of copying.
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template < class NT1 >
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struct NT_converter < NT1, NT1 >
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: public CGAL::cpp98::unary_function< NT1, NT1 >
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{
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const NT1 &
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operator()(const NT1 &a) const
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{
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return a;
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}
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};
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template < class NT1 >
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struct NT_converter < NT1, double >
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: public CGAL::cpp98::unary_function< NT1, double >
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{
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double
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operator()(const NT1 &a) const
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{
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return CGAL_NTS to_double(a);
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}
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};
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template <>
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struct NT_converter < double, double >
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: public CGAL::cpp98::unary_function< double, double >
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{
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const double &
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operator()(const double &a) const
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{
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return a;
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}
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};
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template < class NT1, bool b >
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struct NT_converter < NT1, Interval_nt<b> >
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: public CGAL::cpp98::unary_function< NT1, Interval_nt<b> >
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{
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Interval_nt<b>
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operator()(const NT1 &a) const
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{
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return CGAL_NTS to_interval(a);
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}
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};
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template < bool b >
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struct NT_converter < Interval_nt<b>, Interval_nt<b> >
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: public CGAL::cpp98::unary_function< Interval_nt<b>, Interval_nt<b> >
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{
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const Interval_nt<b> &
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operator()(const Interval_nt<b> &a) const
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{
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return a;
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}
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};
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} //namespace CGAL
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#endif // CGAL_NT_CONVERTER_H
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