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/*
* RuleSymbol.h
*
* Created on: 21 Feb 2014
* Author: hieu
*/
#ifndef RULESYMBOL_H_
#define RULESYMBOL_H_
#include <iostream>
#include <string>
// base class - terminal or non-term
class RuleSymbol
{
public:
RuleSymbol();
virtual ~RuleSymbol();
virtual bool IsNonTerm() const = 0;
virtual std::string Debug() const = 0;
virtual void Output(std::ostream &out) const = 0;
virtual std::string GetString() const = 0;
int Compare(const RuleSymbol &other) const;
};
#endif /* RULESYMBOL_H_ */
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