ExpressionOperator.hpp

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/******************************************************************************/
/* REXX Kernel                                       ExpressionOperator.hpp   */
/*                                                                            */
/* Primitive Expression Operator Class Definitions                            */
/*                                                                            */
/******************************************************************************/
#ifndef Included_RexxExpressionOperator
#define Included_RexxExpressionOperator
 
class RexxExpressionOperator : public RexxInternalObject {
 public:
  inline RexxExpressionOperator() { ; }
 
  RexxExpressionOperator(int, RexxObject *, RexxObject *);
  inline RexxExpressionOperator(RESTORETYPE restoreType) { ; };
  void   live(size_t);
  void   liveGeneral(int reason);
  void   flatten(RexxEnvelope *);
 
  inline const char *operatorName() { return operatorNames[oper - 1]; }
 
protected:
    // table of operator names
    static const char *operatorNames[];
 
    int  oper;                           /* operator to perform               */
    RexxObject *right_term;              /* right term of the operator        */
    RexxObject *left_term;               /* left term of the operator         */
};
 
class RexxBinaryOperator : public RexxExpressionOperator {
 public:
  void  *operator new(size_t);
  inline void  *operator new(size_t size, void *ptr) {return ptr;};
  inline void  operator delete(void *) { ; }
  inline void  operator delete(void *, void *) { ; }
 
  inline RexxBinaryOperator(int op, RexxObject *left, RexxObject *right)
      : RexxExpressionOperator(op, left, right) { ; }
  inline RexxBinaryOperator(RESTORETYPE restoreType) { ; };
  RexxObject *evaluate(RexxActivation *, RexxExpressionStack *);
};
 
 
class RexxUnaryOperator : public RexxExpressionOperator {
 public:
  void  *operator new(size_t);
  inline void  *operator new(size_t size, void *ptr) {return ptr;};
  inline void  operator delete(void *) { ; }
  inline void  operator delete(void *, void *) { ; }
 
  inline RexxUnaryOperator(int op, RexxObject *left)
      : RexxExpressionOperator(op, left, OREF_NULL) { ; }
  inline RexxUnaryOperator(RESTORETYPE restoreType) { ; };
  RexxObject *evaluate(RexxActivation *, RexxExpressionStack *);
};
#endif