Re: new revision ada (limited with, excpetion handling)

["Nick Roberts" <nick.roberts@acm.org>]

"Brian May" <bam@snoopy.apana.org.au> wrote in message
news:sa4r7s9hkp6.fsf_-_@snoopy.apana.org.au...

>     Nick> In fact, this restriction is likely be lifted (in a very
>     Nick> restricted way ;-) in the new revision of the Ada
>     Nick> language. It has proved to be too inconvenient.
>
> Are the details of this new revision of Ada published anywhere?

   http://www.ada-auth.org/cgi-bin/cvsweb.cgi/AIs/AI-50217.TXT?rev=1.13

> Personally I have very happy with Ada95 the way it is, the only
> exception being exception handling which tends to look restrictive
> now compared with, say Java exceptions (as functions declare
> what exceptions they can raise, and can pass more information in
> the exception instead of just a string).

I'm not sure that it would be appropriate to add such facilities to the Ada
standard. Remember, a key area of Ada usage is embedded systems, for which
(the necessity to support) such facilities would be likely to be unwelcome
shiralee.

It may be appropriate for a secondary or informal standard to agreed upon by
those Ada compiler companies for whom it is appropriate, possibly to add a
procedure allowing a value in the class of a given abstract root tagged type
to be associated with an exception instance, and a function to retrieve this
value. It seems to me that a mechanism of this kind is required to (neatly)
support the current CORBA Ada binding.

-- 
Nick Roberts