Re: Some help for a C++ guy

[defaultuserbr@yahoo.com]

tmo...@acm.org wrote:
> >  Handlers : Array (0..1) of Message_Handler.Handler;
> > ...
> >     Callbacks := Handlers(0).Num_Message_Callbacks;
>   In Ada 95 you would say
>       Callbacks := Num_Message_Callbacks(Handler(0));
> ie, you pass the (tagged) parameter as a parameter, not as a prefix.

Which I gather requires a change in the function's signature. That's
not a big deal for that one, but the callback is another matter.

> (The prefix form will apparently be allowed by the upcoming
revision.)
>   With the generic version you clearly did not have inheritance, so
do
> want to add it now?  You must be planning some significant
architectural
> changes.  Why is a Handler a tagged record rather than an untagged
one?

Yes, that's true. I was thinking about inheritance because I may want
different message handlers for different message types. But it's not
essential. I'm not too optimistic about this even working, due to the
problem (I think) with the callback signature.



Brian