From: Robert A Duff <bobduff@shell01.TheWorld.com>
Subject: Re: Ripple effect
Date: 04 Sep 2006 14:06:29 -0400
Date: 2006-09-04T14:06:29-04:00 [thread overview]
Message-ID: <wccejurbj6i.fsf@shell01.TheWorld.com> (raw)
In-Reply-To: ZpXKg.125106$FQ1.9495@attbi_s71
"Jeffrey R. Carter" <spam.not.jrcarter@acm.not.spam.org> writes:
> Robert A Duff wrote:
> > The "Nada" thing was a joke. I would not call a language "Nada", and
> > certainly not "Duff". ;-)
>
> Nada sounds like a great name for a language :) "What's so great about
> this language?" "Oh, Nada."
Nah.
> You did indicate that you would probably name it after someone.
Who or whom? ;-)
> > I think you mean there is no equivalent of "use type".
>
> IIRC, there is no equivalent of "use" or "use type". Of course, I may
> have misunderstood.
Not sure about "use" but "use type" is a bad idea -- should be the
default.
> > No, I think you misunderstand the "Ripple Effect". As I understand it,
> > the Ripple Effect means that adding/removing a with_clause can cause
> > compilation units that do not depend DIRECTLY on the modified thing to
> > become illegal. For example, suppose C with's B and B with's A. Can a
> > with_clause on A affect the legality of C? If so, there's a Ripple
> > Effect.
>
> I've just rechecked the answer in the FAQ at adapower.com, and I think
> we're both mistaken:
Could be.
>...'In brief, the (undesirable) Ripple effect was
> related to whether the legality of a compilation unit could be affected
> by adding or removing an otherwise unneeded "with" clause on some
> compilation unit on which the unit depended, directly or indirectly.'
> (Tucker Taft)
Sorry, but I've lost the context here. What does "otherwise unneeded"
mean?
> So it's not a with on C, as I thought, and can be a with on B, which you
> exclude. It also refers only to unneeded withs. So, if B withs A
> unnecessarily, that could cause a Ripple effect.
Not sure what "unnecessarily" means. I mean, if you say "with A" and
refer to A.Mumble, that's "necessary", right?
> > Anyway, to answer Jeff's question: I think with_clauses should be
> > transitive in the first place, so that the Ripple Effect is not an
> > issue.
>
> So you mean, in the example you give above, that because C withs B and B
> withs A, that C withs A? Is that how your language works?
Yes. Do you think it should be otherwise?
- Bob
next prev parent reply other threads:[~2006-09-04 18:06 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-23 22:29 Ripple effect Jeffrey R. Carter
2006-08-24 9:21 ` Maciej Sobczak
2006-08-24 23:39 ` Jeffrey R. Carter
2006-08-25 7:03 ` Maciej Sobczak
2006-08-24 18:22 ` Adam Beneschan
2006-08-24 23:40 ` Jeffrey R. Carter
2006-09-04 13:52 ` Robert A Duff
2006-09-04 15:15 ` Jeffrey R. Carter
2006-09-04 18:06 ` Robert A Duff [this message]
2006-09-05 2:33 ` Jeffrey R. Carter
2006-09-05 7:23 ` Dmitry A. Kazakov
2006-09-05 16:28 ` Robert A Duff
2006-09-05 16:23 ` Robert A Duff
2006-09-05 21:36 ` Jeffrey R. Carter
2006-09-07 18:18 ` Robert A Duff
2006-09-08 22:02 ` Jeffrey R. Carter
2006-09-06 0:10 ` Randy Brukardt
2006-09-07 18:30 ` Robert A Duff
2006-09-07 21:21 ` Simon Wright
2006-09-08 2:08 ` Randy Brukardt
2006-09-09 14:55 ` adaworks
2006-09-05 23:52 ` Randy Brukardt
2006-09-07 19:09 ` Adam Beneschan
2006-09-07 19:21 ` Ed Falis
2006-09-07 19:46 ` Larry Kilgallen
2006-09-08 13:06 ` Ed Falis
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