SystemCallNode.h

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/* -*- C++ -*- */
#ifndef _MADARA_SYSTEM_CALL_H_
#define _MADARA_SYSTEM_CALL_H_
 
#ifndef _MADARA_NO_KARL_
 
#include <string>
#include <stdexcept>
#include "madara/knowledge/KnowledgeRecord.h"
#include "madara/utility/StdInt.h"
#include "madara/expression/CompositeTernaryNode.h"
 
namespace madara
{
namespace expression
{
// Forward declaration.
class Visitor;
 
class SystemCallNode : public CompositeTernaryNode
{
public:
  SystemCallNode(madara::knowledge::ThreadSafeContext& context);
 
  SystemCallNode(madara::knowledge::ThreadSafeContext& context,
      const ComponentNodes& nodes);
 
  virtual ~SystemCallNode(void);
 
  virtual madara::knowledge::KnowledgeRecord item(void) const;
 
  virtual madara::knowledge::KnowledgeRecord prune(bool& can_change) = 0;
 
  virtual madara::knowledge::KnowledgeRecord evaluate(
      const madara::knowledge::KnowledgeUpdateSettings& settings) = 0;
 
  virtual void accept(Visitor& visitor) const;
 
protected:
  madara::knowledge::ThreadSafeContext& context_;
};
}
}
 
#endif  // _MADARA_NO_KARL_
 
#endif /* _MADARA_SYSTEM_CALL_H_ */