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#ifndef EVALUATOR_H_
#define EVALUATOR_H_
#include <string>
#include "value.h"
class evaluator {
public:
evaluator(const char * display_name);
virtual value * evaluate(
value * l,
value * r);
virtual std::string to_string();
private:
const char * m_display_name;
};
class add_evaluator : public evaluator{
public:
add_evaluator();
value * evaluate(
float_value * l,
float_value * r);
};
#endif //EVALUATOR_H_
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