18 #ifndef CNormalBase_H__
19 #define CNormalBase_H__
30 virtual std::string
toString()
const = 0;
35 virtual void refresh()
const;
37 mutable std::string mInfix;
virtual std::string toString() const =0
virtual bool areEqual(const CNormalBase &rhs) const
virtual bool simplify()=0
virtual CNormalBase * copy() const =0