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// Copyright (c) 1997 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/Circulator/include/CGAL/circulator_bases.h $
// $Id: circulator_bases.h 28567 2006-02-16 14:30:13Z lsaboret $
//
//
// Author(s) : Lutz Kettner <kettner@inf.ethz.ch>
#ifndef CGAL_CIRCULATOR_BASES_H
#define CGAL_CIRCULATOR_BASES_H 1
#ifndef CGAL_PROTECT_CSTDDEF
#include <cstddef>
#define CGAL_PROTECT_CSTDDEF
#endif
#ifndef CGAL_PROTECT_ITERATOR
#include <iterator>
#define CGAL_PROTECT_ITERATOR
#endif
CGAL_BEGIN_NAMESPACE
struct Circulator_tag {}; // any circulator.
struct Iterator_tag {}; // any iterator.
struct Forward_circulator_tag
: public std::forward_iterator_tag {};
struct Bidirectional_circulator_tag
: public std::bidirectional_iterator_tag {};
struct Random_access_circulator_tag
: public std::random_access_iterator_tag {};
template <class T, class Dist = std::ptrdiff_t, class Size = std::size_t>
struct Forward_circulator_base {
typedef T value_type;
typedef Dist difference_type;
typedef Size size_type;
typedef T* pointer;
typedef T& reference;
typedef Forward_circulator_tag iterator_category;
};
template <class T, class Dist = std::ptrdiff_t, class Size = std::size_t>
struct Bidirectional_circulator_base {
typedef T value_type;
typedef Dist difference_type;
typedef Size size_type;
typedef T* pointer;
typedef T& reference;
typedef Bidirectional_circulator_tag iterator_category;
};
template <class T, class Dist = std::ptrdiff_t, class Size = std::size_t>
struct Random_access_circulator_base {
typedef T value_type;
typedef Dist difference_type;
typedef Size size_type;
typedef T* pointer;
typedef T& reference;
typedef Random_access_circulator_tag iterator_category;
};
template < class Category,
class T,
class Distance = std::ptrdiff_t,
class Size = std::size_t,
class Pointer = T*,
class Reference = T&>
struct Circulator_base {
typedef Category iterator_category;
typedef T value_type;
typedef Distance difference_type;
typedef Size size_type;
typedef Pointer pointer;
typedef Reference reference;
};
// variant base classes
// ---------------------
template <class T, class Dist = std::ptrdiff_t, class Size = std::size_t>
class Forward_circulator_ptrbase // forward circulator.
{
protected:
void* _ptr;
public:
typedef Forward_circulator_tag iterator_category;
typedef T value_type;
typedef Dist difference_type;
typedef Size size_type;
typedef T* pointer;
typedef T& reference;
Forward_circulator_ptrbase() : _ptr(NULL) {}
Forward_circulator_ptrbase(void* p) : _ptr(p) {}
};
template <class T, class Dist = std::ptrdiff_t, class Size = std::size_t>
class Bidirectional_circulator_ptrbase // bidirectional circulator.
{
protected:
void* _ptr;
public:
typedef Bidirectional_circulator_tag iterator_category;
typedef T value_type;
typedef Dist difference_type;
typedef Size size_type;
typedef T* pointer;
typedef T& reference;
Bidirectional_circulator_ptrbase() : _ptr(NULL) {}
Bidirectional_circulator_ptrbase(void* p) : _ptr(p) {}
};
template <class T, class Dist = std::ptrdiff_t, class Size = std::size_t>
class Random_access_circulator_ptrbase // random access circulator.
{
protected:
void* _ptr;
public:
typedef Random_access_circulator_tag iterator_category;
typedef T value_type;
typedef Dist difference_type;
typedef Size size_type;
typedef T* pointer;
typedef T& reference;
Random_access_circulator_ptrbase() : _ptr(NULL) {}
Random_access_circulator_ptrbase(void* p) : _ptr(p) {}
};
CGAL_END_NAMESPACE
#endif // CGAL_CIRCULATOR_BASES_H //
// EOF //
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