From: Shark8 <onewingedshark@gmail.com>
Subject: Re: Preventing type extensions
Date: Thu, 16 Sep 2010 17:16:52 -0700 (PDT)
Date: 2010-09-16T17:16:52-07:00 [thread overview]
Message-ID: <1c27b555-0832-413a-b585-e5c6b22e8ac4@t7g2000vbj.googlegroups.com> (raw)
In-Reply-To: 134q4k2ly2pf4$.17nlv1q6q5ivo.dlg@40tude.net
> Final classes make no sense. I am glad that at least this was not borrowed
> by Ada ... yet.
I agree; final classes are a bad idea -- Unless the object's behavior
is perfect and there can [in no way] be a changed requirement... which
almost never happens. There have been times where I've had to 'extend'
a final Java class by embedding it into another class and writing all
the methods as passthroughs except for the ones I needed to introduce
some [usually slightly] different behavior.
On the original poster's topic; is there anything from doing something
like:
Package Some_Object_Package is
Type Object-Type is private;
-- Elementery functions.
private
Type Object-Type is tagged null record;
end package Some_Object_Package;
Sure, a child-package could be introduced to extend the object, but
its specification cannot rely on anything not publicly visible in its
parent's specification... meaning that the public portion of the
object cannot expose that it is a tagged record. Right?
next prev parent reply other threads:[~2010-09-17 0:16 UTC|newest]
Thread overview: 107+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-12 10:18 Preventing type extensions Florian Weimer
2010-09-12 11:59 ` Ludovic Brenta
2010-09-12 12:53 ` Florian Weimer
2010-09-12 21:23 ` Maciej Sobczak
2010-09-13 5:32 ` Florian Weimer
2010-09-13 7:13 ` Dmitry A. Kazakov
2010-09-13 9:19 ` Georg Bauhaus
2010-09-13 9:42 ` Dmitry A. Kazakov
2010-09-13 10:23 ` Niklas Holsti
2010-09-13 12:55 ` Cyrille
2010-09-13 13:55 ` Dmitry A. Kazakov
2010-09-13 21:13 ` J-P. Rosen
2010-09-21 13:57 ` Cyrille
2010-09-21 14:19 ` Dmitry A. Kazakov
2010-09-21 14:44 ` Cyrille
2010-09-21 16:25 ` Dmitry A. Kazakov
2010-09-21 17:11 ` Georg Bauhaus
2010-09-21 18:11 ` Dmitry A. Kazakov
2010-09-23 20:00 ` Simon Wright
2010-09-23 20:49 ` Dmitry A. Kazakov
2010-09-24 9:10 ` Georg Bauhaus
2010-09-24 10:24 ` Dmitry A. Kazakov
2010-09-24 13:30 ` Niklas Holsti
2010-09-24 16:27 ` Dmitry A. Kazakov
2010-09-24 17:47 ` Niklas Holsti
2010-09-24 19:42 ` Dmitry A. Kazakov
2010-09-21 14:32 ` J-P. Rosen
2010-09-21 15:02 ` Cyrille
2010-09-21 15:26 ` J-P. Rosen
2010-09-21 16:18 ` Cyrille
2010-09-22 8:01 ` J-P. Rosen
2010-09-22 17:28 ` Cyrille
2010-09-22 19:30 ` Ludovic Brenta
2010-09-22 19:51 ` Florian Weimer
2010-09-22 20:14 ` Dmitry A. Kazakov
2010-09-22 20:25 ` Florian Weimer
2010-09-22 20:38 ` Dmitry A. Kazakov
2010-09-22 21:25 ` Vinzent Hoefler
2010-09-22 21:20 ` Georg Bauhaus
2010-09-22 20:16 ` Ludovic Brenta
2010-09-22 20:34 ` Florian Weimer
2010-09-22 22:45 ` Britt Snodgrass
2010-09-23 8:02 ` Ludovic Brenta
2010-09-23 16:51 ` Pascal Obry
2010-09-23 18:37 ` Florian Weimer
2010-09-23 18:55 ` Pascal Obry
2010-09-23 20:28 ` Ludovic Brenta
2010-09-24 9:20 ` Ludovic Brenta
2010-09-24 14:49 ` Simon Wright
2010-09-24 15:09 ` Ludovic Brenta
2010-09-24 16:21 ` Robert A Duff
2010-09-25 7:10 ` Pascal Obry
2010-09-25 12:03 ` Brian Drummond
2010-09-24 8:16 ` J-P. Rosen
2010-09-24 8:39 ` Cyrille
2010-09-24 9:27 ` Cyrille
2010-09-29 16:47 ` J-P. Rosen
2010-09-30 10:08 ` Cyrille
2010-10-05 17:02 ` J-P. Rosen
2010-10-08 7:50 ` Cyrille
2010-10-08 13:58 ` Cyrille
2010-10-08 20:12 ` Dmitry A. Kazakov
2010-10-11 7:57 ` Cyrille
2010-10-11 8:24 ` Dmitry A. Kazakov
2010-10-12 5:23 ` Shark8
2010-10-13 9:06 ` J-P. Rosen
2010-10-13 17:37 ` Cyrille
2010-10-13 18:50 ` Dmitry A. Kazakov
2010-09-21 14:50 ` (see below)
2010-09-21 17:37 ` Cyrille
2010-09-21 19:07 ` (see below)
2010-09-13 13:05 ` Dmitry A. Kazakov
2010-09-13 20:21 ` Niklas Holsti
2010-09-13 21:00 ` Dmitry A. Kazakov
2010-09-13 21:10 ` J-P. Rosen
2010-09-14 12:16 ` Niklas Holsti
2010-09-14 16:46 ` Dmitry A. Kazakov
2010-09-14 18:08 ` Niklas Holsti
2010-09-14 18:32 ` Niklas Holsti
2010-09-15 8:18 ` Dmitry A. Kazakov
2010-09-14 17:04 ` J-P. Rosen
2010-09-13 15:12 ` Securing type extensions (was: Preventing type extensions) Georg Bauhaus
2010-09-13 15:29 ` Securing type extensions Dmitry A. Kazakov
2010-09-13 17:23 ` Simon Wright
2010-09-13 20:22 ` Georg Bauhaus
2010-09-13 20:41 ` Dmitry A. Kazakov
2010-09-14 10:02 ` Georg Bauhaus
2010-09-14 12:22 ` Dmitry A. Kazakov
2010-09-14 21:18 ` Georg Bauhaus
2010-09-15 8:15 ` Dmitry A. Kazakov
2010-09-15 20:47 ` Georg Bauhaus
2010-09-16 7:47 ` Dmitry A. Kazakov
2010-09-16 11:52 ` Georg Bauhaus
2010-09-16 12:45 ` Dmitry A. Kazakov
2010-09-16 20:53 ` Georg Bauhaus
2010-09-16 21:37 ` Dmitry A. Kazakov
2010-09-17 8:45 ` Georg Bauhaus
2010-09-17 9:39 ` Dmitry A. Kazakov
2010-10-05 5:59 ` Randy Brukardt
2010-09-13 18:32 ` Preventing " Florian Weimer
2010-09-13 20:30 ` Dmitry A. Kazakov
2010-09-22 19:41 ` Florian Weimer
2010-09-22 20:34 ` Dmitry A. Kazakov
2010-09-22 21:10 ` Georg Bauhaus
2010-09-17 0:16 ` Shark8 [this message]
2010-09-17 7:04 ` AdaMagica
2010-09-17 21:05 ` Shark8
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