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From: Simon Wright <simon.j.wright@mac.com>
Newsgroups: comp.lang.ada
Subject: Re: Exceptions
Date: Fri, 07 Dec 2007 18:59:41 +0000
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Date: 2007-12-07T18:59:41+00:00
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Adam Beneschan <adam@irvine.com> writes:

> On Dec 6, 7:00 am, shaunpatter...@gmail.com wrote:
>> Is there any way to force programmers to catch exception that
>> your function throws?
>
> Not in Ada.  If you're looking for, say, a pragma that you can put
> on a subprogram declaration to tell the compiler to reject any code
> that calls the subprogram in a place not governed by an exception
> handler for a specified exception---that's an interesting idea, and
> maybe if there's enough interest it could be added to a future
> revision of Ada, probably Annex H.  I don't see any problem with a
> particular compiler vendor implementing a pragma like that, though,
> although of course it would be non-portable; perhaps you could ask
> your vendor if they'd be willing to implement something like that.
> It would probably not be too difficult to implement.

I think this would be a very bad idea. I don't want to be forced to
deal with the exception 'here' when it would be better handled by my
caller.

I suppose we could have 'pragma Propagates' but it seems like a lot of
work for little gain (what _is_ the gain?)

--S