_EXTENDING C++ FOR DISTRIBUTED APPLICATIONS_
by Patrick Suel

Example 1

(a)

class Flight
{
    public:
        ILB_ENTRY int Passengers;   // data member subject to notification
};


(b)

class Flight
{
    public:                          // these are generated functions
        int    Passengers();         // an accessor function (to get value)
        void   Passengers(int);      // a mutator function (to set value)
    private:
        int    _Passengers;          //  the real data member is private

};


Example 2:  

class Airline
{
    public:
        ILB_USES   Airport  *Departure;       // Departing airport
        ILB_USES   Airport  *Arrival;         // Arriving airport
        ILB_HAS    Flight   *Flight {0, ...}; // Flight with     
                                              // cardinality unlimited
};


Example 3: 

ILB_SMART(Airport)    Departure ();
ILB_SMART(Airport)    Departure ( ILB_SMART(Airport) target);



Example 4:

(a)

class Airline
{
    public:
        // ...other data members...
        ILB_DERIVED    int    Passengers;        // passenger count
                       int    countPassengers(); // evaluation function
};


(b)

int ILB_EVALUATE(Airline, Passengers) ()
{
    return    owner().countPassengers();
}


Example 5: 

void  Line::Transfer(char* new_co_name)
{
    Airline *new_co = Airline::get(new_co_name);    // Get the company

    if(new_co)
    {
        cut();                        // cut the Airline.
        new_co->Lines().cons(this);   // paste Line into the new Airline.
    }
}