IteratorImpl.h

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#pragma once
#include "SyntaxTree.h"
 
class IteratorImpl {
 
public:
  explicit IteratorImpl(SyntaxTree const &tree);
 
  virtual ~IteratorImpl();
 
  virtual SyntaxTree operator*() = 0;
 
  virtual SyntaxTree *operator->() = 0;
 
  virtual void operator++() = 0;
 
  virtual bool operator==(const IteratorImpl &rhs) const = 0;
 
  virtual bool operator!=(const IteratorImpl &rhs) const = 0;
 
  virtual IteratorImpl *clone() = 0;
 
  SyntaxTree const &get_tree() const;
 
protected:
  SyntaxTree const &tree;
};