Symbol.h

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#ifndef         SYMBOL_H_
# define        SYMBOL_H_

#include <iostream>
#include <string>

namespace IRIS {

  using namespace std;

  namespace Fuzzy {

    class Symbol 
    {
      
      public :
    
    //  CONSTRUCTORS  /////////////////////////////////////////////////////
 
        Symbol( const string& name = "?" );
        Symbol( const Symbol& other ); 

    //  DESTRUCTORS  //////////////////////////////////////////////////////

        virtual ~Symbol(void) ;
    
    //  SET MEMBER FUNCTIONS (MUTATORS)  //////////////////////////////////

        void setName( const string& name ); 
        Symbol& operator=( const Symbol& other );

    //  GET MEMBER FUNCTIONS (ACCESSORS)  /////////////////////////////////

        string getName() const ;
        //        /// returns a copy/clone of this object
        //        virtual Symbol* clone() = 0;
        // two possible functions to call a private member
        // function
//        virtual double operator()( double a , double b ) = 0;
//        virtual double eval( double a , double b ) = 0;

    //  (OTHER) OVERLOADED OPERATORS  /////////////////////////////////////

        friend bool operator==( const Symbol& a , const Symbol& b );
        friend ostream& operator<<( ostream& outs , const Symbol& src );
    
      protected :
    
        string name ;     // name of the symbol

    //  UTILITIES  ////////////////////////////////////////////////////////

        void _copy( const Symbol& other );
        void _destroy( );
    
    }; // end of Symbol class

  } // end of Fuzzy namespace

} // end of IRIS namespace
    
#endif      /* !SYMBOL_H_ */

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