Iterator.h

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/* -*- C++ -*- */
#ifndef _MADARA_TREE_ITERATOR_H_
#define _MADARA_TREE_ITERATOR_H_

#include <string>

#include "madara/utility/Refcounter.h"
#include "madara/expression/IteratorImpl.h"

namespace madara
{
  namespace expression
  {

    // Forward declarations.
    class ExpressionTreeCommandFactory;
    class ComponentNode;

    class ExpressionTreeIterator
    {
    public:
      ExpressionTreeIterator (const ExpressionTreeIterator &ts);
      
      ExpressionTreeIterator (ExpressionTreeIteratorImpl *impl);

      // @@ ExpressionTree operator* (void);
      ExpressionTree operator* (void);

      // @@ ExpressionTree operator* (void);
      const ExpressionTree operator* (void) const;

      ExpressionTreeIterator &operator++ (void);

      ExpressionTreeIterator operator++ (int);

      bool operator== (const ExpressionTreeIterator &rhs);

      bool operator!= (const ExpressionTreeIterator &rhs);

      // = Necessary traits
      typedef std::forward_iterator_tag iterator_category;
      typedef long value_type;
      typedef int *pointer;
      typedef int &reference;
      typedef int difference_type;

    private:
      madara::utility::Refcounter<ExpressionTreeIteratorImpl> impl_;
    };

    class ExpressionTreeConstIterator
    {
    public:
      ExpressionTreeConstIterator (const ExpressionTreeConstIterator &ts);
      
      ExpressionTreeConstIterator (ExpressionTreeIteratorImpl *impl);
      
      const ExpressionTree operator* (void) const;

      ExpressionTreeConstIterator &operator++ (void);

      ExpressionTreeConstIterator operator++ (int);

      bool operator== (const ExpressionTreeConstIterator &rhs);

      bool operator!= (const ExpressionTreeConstIterator &rhs);

      // = Necessary traits
      typedef std::forward_iterator_tag iterator_category;
      typedef long value_type;
      typedef int *pointer;
      typedef int &reference;
      typedef int difference_type;

    private:
      madara::utility::Refcounter <ExpressionTreeIteratorImpl> impl_;
    };
}
}
#endif /* _MADARA_TREE_ITERATOR_H_ */