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// Copyright (c) 2003 Utrecht University (The Netherlands),
// ETH Zurich (Switzerland), Freie Universitaet Berlin (Germany),
// INRIA Sophia-Antipolis (France), Martin-Luther-University Halle-Wittenberg
// (Germany), Max-Planck-Institute Saarbruecken (Germany), RISC Linz (Austria),
// and Tel-Aviv University (Israel). 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; version 2.1 of the License.
// See the file LICENSE.LGPL distributed with CGAL.
//
// 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: svn+ssh://scm.gforge.inria.fr/svn/cgal/branches/CGAL-3.2-branch/Kernel_23/include/CGAL/Kernel/Cartesian_coordinate_iterator_2.h $
// $Id: Cartesian_coordinate_iterator_2.h 28567 2006-02-16 14:30:13Z lsaboret $
//
//
// Author(s) : Andreas Fabri
#ifndef CGAL_CARTESIAN_COORDINATE_ITERATOR_2_H
#define CGAL_CARTESIAN_COORDINATE_ITERATOR_2_H
#include <cstddef>
#include <iterator>
CGAL_BEGIN_NAMESPACE
template <class K>
class Cartesian_coordinate_iterator_2
{
protected:
typedef typename K::Point_2 P;
const P* point;
int index;
typedef Cartesian_coordinate_iterator_2<K> Self;
public:
typedef typename K::FT FT;
typedef P Point;
typedef std::random_access_iterator_tag iterator_category;
typedef FT value_type;
typedef std::ptrdiff_t difference_type;
typedef const value_type& reference;
typedef const value_type* pointer;
Cartesian_coordinate_iterator_2(const Point *const p = NULL,
int _index = 0)
: point(p), index(_index)
{}
const FT
operator*() const {
return point->cartesian(index);
}
Self& operator++() {
index++;
return *this;
}
Self&
operator--() {
index--;
return *this;
}
Self
operator++(int) {
Self tmp(*this);
++(*this);
return tmp;
}
Self
operator--(int) {
Self tmp(*this);
--(*this);
return tmp;
}
Self&
operator+=(difference_type i) {
index+=i;
return *this;
}
Self&
operator-=(difference_type i) {
index -= i;
return *this;
}
Self
operator+(difference_type i) const {
Self tmp=*this;
return tmp += i;
}
Self operator-(difference_type i) const {
Self tmp=*this;
return tmp -= i;
}
difference_type
operator-(const Self& x) const {
CGAL_kernel_assertion(point == x.point);
return index - x.index;
}
reference operator[](difference_type i) const {
return *(*this + i);
}
bool operator==(const Self& x) const {
return (point == x.point)&& (index == x.index) ;
}
bool operator!=(const Self& x) const {
return ! (*this==x);
}
bool operator<(const Self& x) const
{
return (x - *this) > 0; }
};
CGAL_END_NAMESPACE
#endif // CGAL_CARTESIAN_COORDINATE_ITERATOR_2_H
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