"Bj�rn Persson" <spam-away@nowhere.nil> wrote in message
news:JoO0c.84716$dP1.234457@newsc.telia.net...
> Thank you, Steve and Robert! I'm afraid I still don't understand why
> Parameter_Wrapper would be necessary, since Steve's solution seems to
> work equally well - at least in Gnat 3.3.2. On the other hand I don't
> understand why a default value for the discriminant would make such a
> difference - but it does.

It's not necessary in Ada 95 unless the components are aliased. I think
Robert uses too many aliased things, and thus has their restrictions on the
brain. :-)

(There is some hope that this restriction will be lifted in Ada 200Y,
because it doesn't really fix anything, and we're likely to adopt a
different solution to the problem that it was supposed to fix. But that's
TBD.)

                           Randy.