BaseIterator.h

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/* SPDX-FileCopyrightText: 2023 Blender Authors
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */
 
#pragma once

 
#include <iterator>
 
#include "MEM_guardedalloc.h"
 
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;
 
  MEM_CXX_CLASS_ALLOC_FUNCS("Freestyle:Const_traits")
};
 
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;
 
  MEM_CXX_CLASS_ALLOC_FUNCS("Freestyle:Nonconst_traits")
};
 
class InputIteratorTag_Traits {
 public:
  typedef std::input_iterator_tag iterator_category;
 
  MEM_CXX_CLASS_ALLOC_FUNCS("Freestyle:InputIteratorTag_Traits")
};
 
class BidirectionalIteratorTag_Traits {
 public:
  typedef std::bidirectional_iterator_tag iterator_category;
 
  MEM_CXX_CLASS_ALLOC_FUNCS("Freestyle:BidirectionalIteratorTag_Traits")
};
 
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() {}
 
  MEM_CXX_CLASS_ALLOC_FUNCS("Freestyle:IteratorBase")
};
 
} /* namespace Freestyle */