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From: Simon Wright <simon@pushface.org>
Subject: Re: The future of Spark . Spark 2014 : a wreckage
Date: Tue, 09 Jul 2013 12:29:03 +0100
Date: 2013-07-09T12:29:03+01:00	[thread overview]
Message-ID: <lyip0kx98g.fsf@pushface.org> (raw)
In-Reply-To: 1vc73wjwkqmnl$.gx86xaqy60u4$.dlg@40tude.net

"Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> writes:

> On Mon, 8 Jul 2013 16:32:21 -0500, Randy Brukardt wrote:

>> that they use whatever information is available, and most of all,
>> that they only depend on the specifications of packages (never, ever,
>> on the contents of a body).
>
> There are obviously goals which cannot be proven without the
> bodies. Proofs about specifications are important but far not
> all. Consider LSP as an example. You cannot prove substitutability
> from interfaces. It simply does not work. Same with almost everything
> else, because proving something in general is much more harder, even
> impossible, than proving things about a concrete instance, e.g. body.

I think what Randy meant (and may even have said) was that in

   with A;
   package B is ...

it shouldn't be necessary to look at the body of A to prove the body of
B. Of course the body of A will have to be proved ... but not right now.


  reply	other threads:[~2013-07-09 11:29 UTC|newest]

Thread overview: 68+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-07-08 17:56 The future of Spark . Spark 2014 : a wreckage vincent.diemunsch
2013-07-08 19:24 ` Simon Wright
2013-07-08 20:59 ` Florian Weimer
2013-07-09  7:40   ` Dmitry A. Kazakov
2013-07-09  8:30     ` Georg Bauhaus
2013-07-09  8:58       ` Dmitry A. Kazakov
2013-07-09 10:27         ` G.B.
2013-07-09 11:13         ` G.B.
2013-07-09 15:14     ` Adam Beneschan
2013-07-09 22:51     ` Robert A Duff
2013-07-10  7:49       ` Dmitry A. Kazakov
2013-07-10  8:21         ` Georg Bauhaus
2013-07-08 21:32 ` Randy Brukardt
2013-07-09  7:28   ` Dmitry A. Kazakov
2013-07-09 11:29     ` Simon Wright [this message]
2013-07-09 12:22       ` Dmitry A. Kazakov
2013-07-09 20:37     ` Randy Brukardt
2013-07-10 10:03       ` Dmitry A. Kazakov
2013-07-10 23:21         ` Randy Brukardt
2013-07-11  7:44           ` Dmitry A. Kazakov
2013-07-11 22:28             ` Randy Brukardt
2013-07-12  8:02               ` Dmitry A. Kazakov
2013-07-12 21:16                 ` Randy Brukardt
2013-07-14 10:19                   ` Dmitry A. Kazakov
2013-07-14 15:57                     ` Georg Bauhaus
2013-07-16  0:16                       ` Randy Brukardt
2013-07-17  1:30                         ` Shark8
2013-07-17 23:08                           ` Randy Brukardt
2013-07-18  7:19                             ` Dmitry A. Kazakov
2013-07-19  4:36                               ` Randy Brukardt
2013-07-16  0:13                     ` Randy Brukardt
2013-07-16  8:37                       ` Dmitry A. Kazakov
2013-07-16 22:13                         ` Randy Brukardt
2013-07-17  7:59                           ` Dmitry A. Kazakov
2013-07-17 23:26                             ` Randy Brukardt
2013-07-18  7:37                               ` Dmitry A. Kazakov
2013-07-19  4:32                                 ` Randy Brukardt
2013-07-19  7:16                                   ` Dmitry A. Kazakov
2013-07-20  5:32                                     ` Randy Brukardt
2013-07-20  9:06                                       ` Dmitry A. Kazakov
2013-07-12  1:01           ` Slow? Ada?? Bill Findlay
2013-07-09  7:57   ` The future of Spark . Spark 2014 : a wreckage Stefan.Lucks
2013-07-09 20:46     ` Randy Brukardt
2013-07-10  8:03       ` Stefan.Lucks
2013-07-10 12:46         ` Simon Wright
2013-07-10 23:10         ` Randy Brukardt
2013-07-11 19:23           ` Stefan.Lucks
2013-07-12  0:21             ` Randy Brukardt
2013-07-12  9:12               ` Stefan.Lucks
2013-07-12 20:47                 ` Randy Brukardt
2013-08-05  5:43                 ` Paul Rubin
2013-07-10 12:19   ` vincent.diemunsch
2013-07-10 16:02     ` Simon Wright
2013-07-11  0:36     ` Randy Brukardt
2013-07-11  6:19       ` Simon Wright
2013-07-11 23:11         ` Randy Brukardt
2013-07-11 10:10       ` vincent.diemunsch
2013-07-11 14:23         ` Dmitry A. Kazakov
2013-07-12  0:07           ` Randy Brukardt
2013-07-12  0:00         ` Randy Brukardt
2013-07-12  7:25           ` Simon Wright
2013-07-12 20:07             ` Randy Brukardt
2013-07-12 14:23           ` Robert A Duff
2013-07-12 20:14             ` Randy Brukardt
2013-07-11 23:50       ` Shark8
2013-07-08 23:18 ` Peter C. Chapin
2013-07-09  7:34   ` Stefan.Lucks
2013-07-09 15:21     ` Adam Beneschan
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