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/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef __FREESTYLE_BASE_ITERATOR_H__
#define __FREESTYLE_BASE_ITERATOR_H__
/** \file \ingroup freestyle
* \brief Classes defining the basic "Iterator" design pattern
*/
#include <iterator>
#ifdef WITH_CXX_GUARDEDALLOC
#include "MEM_guardedalloc.h"
#endif
namespace Freestyle {
// use for iterators defintions
template <class Element>
class Nonconst_traits;
template <class Element>
class Const_traits
{
public:
typedef Element value_type;
typedef const Element& reference;
typedef const Element *pointer;
typedef ptrdiff_t difference_type;
typedef Nonconst_traits<Element> Non_const_traits;
#ifdef WITH_CXX_GUARDEDALLOC
MEM_CXX_CLASS_ALLOC_FUNCS("Freestyle:Const_traits")
#endif
};
template <class Element>
class Nonconst_traits
{
public:
typedef Element value_type;
typedef Element& reference;
typedef Element *pointer;
typedef ptrdiff_t difference_type;
typedef Nonconst_traits<Element> Non_const_traits;
#ifdef WITH_CXX_GUARDEDALLOC
MEM_CXX_CLASS_ALLOC_FUNCS("Freestyle:Nonconst_traits")
#endif
};
class InputIteratorTag_Traits
{
public:
typedef std::input_iterator_tag iterator_category;
#ifdef WITH_CXX_GUARDEDALLOC
MEM_CXX_CLASS_ALLOC_FUNCS("Freestyle:InputIteratorTag_Traits")
#endif
};
class BidirectionalIteratorTag_Traits
{
public:
typedef std::bidirectional_iterator_tag iterator_category;
#ifdef WITH_CXX_GUARDEDALLOC
MEM_CXX_CLASS_ALLOC_FUNCS("Freestyle:BidirectionalIteratorTag_Traits")
#endif
};
template<class Traits, class IteratorTagTraits>
class IteratorBase
{
public:
virtual ~IteratorBase() {}
virtual bool begin() const = 0;
virtual bool end() const = 0;
typedef typename IteratorTagTraits::iterator_category iterator_category;
typedef typename Traits::value_type value_type;
typedef typename Traits::difference_type difference_type;
typedef typename Traits::pointer pointer;
typedef typename Traits::reference reference;
protected:
IteratorBase() {}
#ifdef WITH_CXX_GUARDEDALLOC
MEM_CXX_CLASS_ALLOC_FUNCS("Freestyle:IteratorBase")
#endif
};
} /* namespace Freestyle */
#endif // BASEITERATOR_H
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