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From: "Randy Brukardt" <randy@rrsoftware.com>
Newsgroups: comp.lang.ada
Subject: Re: Exceptions
Date: Thu, 13 Dec 2007 13:20:35 -0600
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Date: 2007-12-13T13:20:35-06:00
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"Robert A Duff" <bobduff@shell01.TheWorld.com> wrote in message
news:wcctzmonfmn.fsf@shell01.TheWorld.com...
> "Randy Brukardt" <randy@rrsoftware.com> writes:
>
> > "Niklas Holsti" <niklas.holsti@tidorum.invalid> wrote in message
> > news:475e8bde$0$27850$4f793bc4@news.tdc.fi...
> > ...
> >> And perhaps also
> >>
> >>    5. Exceptions as formal generic parameters.
> >
> > Ada has this (although it isn't obvious): just pass an
> > Ada.Exceptions.Exception_Id to the generic. That is, given a generic
spec
> > something like:
> >
> >     generic
> >          My_Exception : Ada.Exceptions.Exception_Id :=
> > Constraint_Error'Identity;
> >     package Gen is ...
>
> Yeah, you can do that.
>
> But IMHO this area of the language is a mess.
>
> Making exceptions be first-class objects would make the language
> simpler, easier to implement, and more powerful.

Right, but in that case we *still* wouldn't need formal exceptions, because
formal objects would serve just as well. Which really was my point - no
sense in adding more cruft for that.

                     Randy.