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/* SPDX-License-Identifier: GPL-2.0-or-later */
#pragma once
/** \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 definitions
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 */
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