Re: limited/non-limited in Ada95

[Geert Bosch <geert@gonzo.sun3.iaf.nl>]

Jon S Anthony <jsa@synquiry.com> wrote:
   It largely is a matter of _opinion_.  Wrapping non structured
   information _just to solve a mechanism problem_ in a structure is IMO
   a misleading and inappropriate use of that sort of abstraction and the
   supporting construct.  It's a _hack_ as it has _nothing_ to do with
   what you are trying to represent.  Period.  

You can also include a component of a volatile type to the structure
you want to pass by reference. This way you avoid an extra layer of
wrapping. The extra component could be declared as
   type Volatile_Type is null record;
   pragma Volatile (Volatile_Type);

   type My_Ref_Passed_Type is record
      Force_By_Reference : Volatile_Type;
      ...
   end record;

I really do not understand how you can find this to be an ugly hack
to force by-reference semantics that limits the possibilities of 
implementing a garbage collector. 

Regards,
   Geert