CompositePredecrementNode.h

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

#ifndef _MADARA_NO_KARL_

#include "madara/expression/CompositeUnaryNode.h"
#include "madara/knowledge/KnowledgeRecord.h"
#include "madara/expression/CompositeArrayReference.h"
#include "madara/expression/VariableNode.h"

namespace madara
{
  namespace expression
  {
    class ComponentNode;
    class Visitor;

    class CompositePredecrementNode : public CompositeUnaryNode
    {
    public:
      CompositePredecrementNode (logger::Logger & logger,
        ComponentNode *right);

      virtual ~CompositePredecrementNode (void);

      virtual madara::knowledge::KnowledgeRecord item (void) const;

      virtual madara::knowledge::KnowledgeRecord prune (bool & can_change);

      virtual madara::knowledge::KnowledgeRecord evaluate (
        const madara::knowledge::KnowledgeUpdateSettings & settings);

      virtual void accept (Visitor &visitor) const;

    private:

      VariableNode * var_;

      CompositeArrayReference * array_;
    };
  }
}

#endif // _MADARA_NO_KARL_

#endif /* _MADARA_COMPOSITE_PREDECREMENT_NODE_H_ */