Re: JGNAT and Null references

["Marc A. Criley" <mcqnet@earthlink.net>]

Stephen Leake wrote:
> 
> "Marc A. Criley" <mcqnet@earthlink.net> writes:
>  
> >   What
> > do I provide as a "null argument" in JGNAT?  I was hoping to find some
> > sort of predefined "null_reference" constant, analogous to
> > System.Null_Address, but no such luck.
> 
> You can't pass "null", in any form. Defining it as a constant won't
> work; the compiler is smarter than that!
> 

Uh...it did work.  Cleared up the problem just fine.  That it works
doesn't totally sit well with me, since my purist mental picture of a
"constant" involves only a value, and not storage.  Nonetheless, 

   Null_Icon : constant Javax.swing.TabbedPanel.ref := null;

was accepted by the AddTab procedure call.

Marc