From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Subject: Re: Seeking for papers about tagged types vs access to subprograms
Date: Wed, 8 May 2013 20:17:30 +0200
Date: 2013-05-08T20:17:30+02:00 [thread overview]
Message-ID: <4zjhjzc43b3k.1m0hacf27u3jt$.dlg@40tude.net> (raw)
In-Reply-To: op.wwrwooo8ule2fv@cardamome
On Wed, 08 May 2013 18:13:26 +0200, Yannick Duch�ne (Hibou57) wrote:
> Le Wed, 08 May 2013 17:29:33 +0200, Dmitry A. Kazakov
> <mailbox@dmitry-kazakov.de> a �crit:
>> Each time you do something with a type you get another one.
>
> Yes
>
>> Otherwise it
>> becomes untyped. So if you wanted to disallow operations that would make
>> another interface.
>
> That's what a subtype is to me (I don't know if it's the proper term; at
> least it seems to match with Ada's own wording).
No. Ada subtype cannot not disallow an operation. It can at best override
one with "raise Message_Not_Understood;". In order to disallow an operation
you need a new Ada type. Disallowing is not a constraint.
>> To put it differently, there shall be no preconditions
>> on types and their operations which aren't trivially true.
>
> I don't understand that point.
Whatever differences are, they are rendered as differences in the
interfaces rather that in the preconditions. Preconditions of arguments are
always true, or else the language becomes weakly typed.
--
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de
next prev parent reply other threads:[~2013-05-08 18:17 UTC|newest]
Thread overview: 202+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-28 5:14 Seeking for papers about tagged types vs access to subprograms Yannick Duchêne (Hibou57)
2013-04-30 0:31 ` Yannick Duchêne (Hibou57)
2013-04-30 0:41 ` Shark8
2013-04-30 1:00 ` Yannick Duchêne (Hibou57)
2013-05-02 1:18 ` Randy Brukardt
2013-05-02 2:29 ` Jeffrey Carter
2013-05-06 10:00 ` Yannick Duchêne (Hibou57)
2013-05-06 10:18 ` Dmitry A. Kazakov
2013-05-06 10:55 ` Yannick Duchêne (Hibou57)
2013-05-06 12:11 ` Dmitry A. Kazakov
2013-05-06 13:16 ` Yannick Duchêne (Hibou57)
2013-05-06 14:16 ` Dmitry A. Kazakov
2013-05-06 15:15 ` Yannick Duchêne (Hibou57)
2013-05-06 18:55 ` Dmitry A. Kazakov
2013-05-06 20:05 ` Adam Beneschan
2013-05-07 7:30 ` Dmitry A. Kazakov
2013-05-10 4:33 ` Yannick Duchêne (Hibou57)
2013-05-07 20:35 ` Jacob Sparre Andersen news
2013-05-07 20:44 ` Yannick Duchêne (Hibou57)
2013-05-07 22:32 ` Dennis Lee Bieber
2013-05-07 23:10 ` Adam Beneschan
2013-05-08 0:18 ` Shark8
2013-05-10 4:34 ` Yannick Duchêne (Hibou57)
2013-05-10 8:27 ` Simon Wright
2013-05-10 18:08 ` Niklas Holsti
2013-05-08 7:38 ` Dmitry A. Kazakov
2013-05-08 7:59 ` Yannick Duchêne (Hibou57)
2013-05-08 8:23 ` Dmitry A. Kazakov
2013-05-08 9:39 ` Yannick Duchêne (Hibou57)
2013-05-08 9:51 ` Yannick Duchêne (Hibou57)
2013-05-08 10:23 ` Dmitry A. Kazakov
2013-05-08 11:08 ` Yannick Duchêne (Hibou57)
2013-05-08 15:29 ` Dmitry A. Kazakov
2013-05-08 16:13 ` Yannick Duchêne (Hibou57)
2013-05-08 18:17 ` Dmitry A. Kazakov [this message]
2013-05-10 4:35 ` Yannick Duchêne (Hibou57)
2013-05-08 20:27 ` Randy Brukardt
2013-05-09 7:33 ` Dmitry A. Kazakov
2013-05-09 22:19 ` Randy Brukardt
2013-05-10 3:29 ` Yannick Duchêne (Hibou57)
2013-05-10 4:16 ` Yannick Duchêne (Hibou57)
2013-05-10 8:42 ` Dmitry A. Kazakov
2013-05-10 11:18 ` Yannick Duchêne (Hibou57)
2013-05-10 12:15 ` Dmitry A. Kazakov
2013-05-10 12:40 ` Yannick Duchêne (Hibou57)
2013-05-10 12:59 ` Yannick Duchêne (Hibou57)
2013-05-10 13:54 ` Dmitry A. Kazakov
2013-05-10 14:01 ` Yannick Duchêne (Hibou57)
2013-05-10 14:27 ` Dmitry A. Kazakov
2013-05-10 15:20 ` Yannick Duchêne (Hibou57)
2013-05-11 7:22 ` Georg Bauhaus
2013-05-10 18:04 ` Niklas Holsti
2013-05-10 19:33 ` Yannick Duchêne (Hibou57)
2013-05-11 0:18 ` Randy Brukardt
2013-05-11 7:14 ` Yannick Duchêne (Hibou57)
2013-05-11 21:06 ` Niklas Holsti
2013-05-11 23:19 ` Shark8
2013-05-12 6:09 ` Niklas Holsti
2013-05-14 2:02 ` Randy Brukardt
2013-05-12 6:44 ` Yannick Duchêne (Hibou57)
2013-05-12 8:10 ` Niklas Holsti
2013-05-12 8:49 ` Yannick Duchêne (Hibou57)
2013-05-12 18:56 ` Jeffrey Carter
2013-05-12 22:15 ` Robert A Duff
2013-05-13 0:26 ` Jeffrey Carter
2013-05-13 7:03 ` Yannick Duchêne (Hibou57)
2013-05-13 13:15 ` Robert A Duff
2013-05-13 17:30 ` Jeffrey Carter
2013-05-13 18:01 ` J-P. Rosen
2013-05-13 18:39 ` Bill Findlay
2013-05-13 18:57 ` Jeffrey Carter
2013-05-13 19:13 ` Robert A Duff
2013-05-13 20:38 ` J-P. Rosen
2013-05-14 7:26 ` Dmitry A. Kazakov
2013-05-14 20:00 ` Robert A Duff
2013-05-15 10:10 ` Dmitry A. Kazakov
2013-05-14 19:56 ` Robert A Duff
2013-05-15 4:24 ` Yannick Duchêne (Hibou57)
2013-05-15 9:28 ` Dmitry A. Kazakov
2013-05-15 11:31 ` Peter C. Chapin
2013-05-15 12:32 ` Yannick Duchêne (Hibou57)
2013-05-15 19:59 ` Peter C. Chapin
2013-05-15 20:56 ` Dmitry A. Kazakov
2013-05-15 12:46 ` Dmitry A. Kazakov
2013-05-15 18:15 ` Jeffrey Carter
2013-05-15 19:18 ` Eryndlia Mavourneen
2013-05-15 19:57 ` Dmitry A. Kazakov
2013-05-15 20:37 ` Yannick Duchêne (Hibou57)
2013-05-15 20:48 ` Dmitry A. Kazakov
2013-05-16 12:45 ` Eryndlia Mavourneen
2013-05-16 17:16 ` Jeffrey Carter
2013-05-16 9:41 ` G.B.
2013-05-16 12:35 ` J-P. Rosen
2013-05-15 14:21 ` J-P. Rosen
2013-05-14 2:14 ` Randy Brukardt
2013-05-14 19:35 ` Robert A Duff
2013-05-15 4:11 ` Yannick Duchêne (Hibou57)
2013-05-16 23:36 ` Randy Brukardt
2013-05-13 5:21 ` Niklas Holsti
2013-05-13 7:22 ` Dmitry A. Kazakov
2013-05-13 8:23 ` Yannick Duchêne (Hibou57)
2013-05-13 19:20 ` Niklas Holsti
2013-05-14 8:14 ` Dmitry A. Kazakov
2013-05-10 3:47 ` Yannick Duchêne (Hibou57)
2013-05-11 0:22 ` Randy Brukardt
2013-05-11 7:22 ` Yannick Duchêne (Hibou57)
2013-05-10 3:59 ` Yannick Duchêne (Hibou57)
2013-05-10 4:03 ` Yannick Duchêne (Hibou57)
2013-05-10 7:48 ` Dmitry A. Kazakov
2013-05-10 8:12 ` Yannick Duchêne (Hibou57)
2013-05-10 15:11 ` Yannick Duchêne (Hibou57)
2013-05-11 0:42 ` Randy Brukardt
2013-05-11 6:37 ` Dmitry A. Kazakov
2013-05-11 7:06 ` Georg Bauhaus
2013-05-11 7:42 ` Dmitry A. Kazakov
2013-05-11 8:14 ` Yannick Duchêne (Hibou57)
2013-05-14 2:29 ` Randy Brukardt
2013-05-14 7:44 ` Dmitry A. Kazakov
2013-05-14 11:34 ` Yannick Duchêne (Hibou57)
2013-05-14 12:16 ` Dmitry A. Kazakov
2013-05-14 13:13 ` Yannick Duchêne (Hibou57)
2013-05-14 18:41 ` Randy Brukardt
2013-05-15 11:20 ` Peter C. Chapin
2013-05-15 13:00 ` Dmitry A. Kazakov
2013-05-15 21:12 ` Peter C. Chapin
2013-05-15 22:08 ` Dmitry A. Kazakov
2013-05-16 11:31 ` Peter C. Chapin
2013-05-16 11:56 ` Yannick Duchêne (Hibou57)
2013-05-16 12:20 ` Dmitry A. Kazakov
2013-05-16 13:10 ` Peter C. Chapin
2013-05-16 13:54 ` Dmitry A. Kazakov
2013-05-16 17:15 ` G.B.
2013-05-16 18:09 ` Peter C. Chapin
2013-05-16 19:16 ` Dmitry A. Kazakov
2013-05-16 21:59 ` Georg Bauhaus
2013-05-17 19:57 ` Dmitry A. Kazakov
2013-05-16 21:20 ` Niklas Holsti
2013-05-16 23:20 ` Peter C. Chapin
2013-05-17 5:25 ` Niklas Holsti
2013-05-17 7:53 ` Georg Bauhaus
2013-05-16 13:09 ` Eryndlia Mavourneen
2013-05-11 7:58 ` Yannick Duchêne (Hibou57)
2013-05-11 9:08 ` Dmitry A. Kazakov
2013-05-11 18:14 ` Niklas Holsti
2013-05-11 8:03 ` Yannick Duchêne (Hibou57)
2013-05-11 9:16 ` Dmitry A. Kazakov
2013-05-11 11:49 ` Georg Bauhaus
2013-05-11 12:25 ` Dmitry A. Kazakov
2013-05-11 22:51 ` Robert A Duff
2013-05-12 6:02 ` Dmitry A. Kazakov
2013-05-12 6:25 ` Yannick Duchêne (Hibou57)
2013-05-12 7:14 ` Dmitry A. Kazakov
2013-05-12 7:37 ` Simon Wright
2013-05-12 7:59 ` Dmitry A. Kazakov
2013-05-12 8:21 ` Yannick Duchêne (Hibou57)
2013-05-12 9:25 ` Dmitry A. Kazakov
2013-05-12 9:32 ` Yannick Duchêne (Hibou57)
2013-05-12 10:07 ` Dmitry A. Kazakov
2013-05-11 7:32 ` Yannick Duchêne (Hibou57)
2013-05-11 7:46 ` Yannick Duchêne (Hibou57)
2013-05-14 12:46 ` Weaker typing as a part of the way to stronger typing? (Was: Seeking for papers about tagged types vs access to subprograms) Jacob Sparre Andersen
2013-05-14 19:08 ` Randy Brukardt
2013-05-10 16:02 ` Seeking for papers about tagged types vs access to subprograms Yannick Duchêne (Hibou57)
2013-05-08 20:12 ` Randy Brukardt
2013-05-09 7:50 ` Dmitry A. Kazakov
2013-05-09 21:43 ` Randy Brukardt
2013-05-10 4:39 ` Yannick Duchêne (Hibou57)
2013-05-10 7:49 ` Dmitry A. Kazakov
2013-05-11 0:09 ` Randy Brukardt
2013-05-11 6:40 ` Dmitry A. Kazakov
2013-05-14 3:01 ` Randy Brukardt
2013-05-14 8:32 ` Dmitry A. Kazakov
2013-05-14 19:02 ` Randy Brukardt
2013-05-15 4:43 ` Yannick Duchêne (Hibou57)
2013-05-16 23:27 ` Randy Brukardt
2013-05-15 9:14 ` G.B.
2013-05-15 12:08 ` Dmitry A. Kazakov
2013-05-15 14:43 ` G.B.
2013-05-15 15:02 ` Dmitry A. Kazakov
2013-05-14 19:21 ` Robert A Duff
2013-05-10 4:29 ` Yannick Duchêne (Hibou57)
2013-05-07 1:14 ` Randy Brukardt
2013-05-07 2:42 ` Yannick Duchêne (Hibou57)
2013-05-07 1:09 ` Randy Brukardt
2013-05-07 7:41 ` Dmitry A. Kazakov
2013-05-07 20:27 ` Jacob Sparre Andersen news
2013-05-07 20:40 ` Yannick Duchêne (Hibou57)
2013-05-08 7:57 ` Dmitry A. Kazakov
2013-05-08 20:37 ` Randy Brukardt
2013-05-09 8:04 ` Dmitry A. Kazakov
2013-05-09 21:33 ` Randy Brukardt
2013-05-10 7:15 ` Dmitry A. Kazakov
2013-05-11 1:00 ` Randy Brukardt
2013-05-11 7:08 ` Yannick Duchêne (Hibou57)
2013-05-11 7:12 ` Dmitry A. Kazakov
2013-05-14 2:52 ` Randy Brukardt
2013-05-11 5:31 ` Simon Wright
2013-05-11 7:22 ` Dmitry A. Kazakov
2013-05-02 1:09 ` Randy Brukardt
2013-05-02 6:56 ` Dmitry A. Kazakov
2013-05-02 21:49 ` Randy Brukardt
2013-05-03 6:49 ` Dmitry A. Kazakov
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