Re: [OT] Best way to isolate a GUI?

[tmoran@acm.org]

>Short of possibly efficiency concerns or representation issues, I just don't
>see much excuse for variant records when we've got tagged types.
  Whoa there!  If you have default discriminants, you can have
Transport : Vehicle(Kind=>Car, Horsepower=>100);
and later
  Transport := (Kind=>Truck, Axle_Count=>3, Capacity => Tons'(0.5));
and the compiler will even warn you if you forget and try:
  Transport := (Kind=>Truck, Capacity => Tons'(0.5));
That's a lot simpler than futzing with
  Transport : Vehicle_Ptr := new Car'(Horsepower=>100);
etc