From: "Ben Brosgol" <brosgol@world.std.com>
Subject: Re: Dispatching and generics - language lawyer question
Date: Thu, 25 Jul 2002 15:46:45 GMT
Date: 2002-07-25T15:46:45+00:00 [thread overview]
Message-ID: <GztAq4.7F6@world.std.com> (raw)
In-Reply-To: wccadogviqx.fsf@shell01.TheWorld.com
> > For untagged types, _redefined_ equality does not correctly compose and
> > _predefined_ equality reemerges in generics if not properly transferred
by a
> > formal parameter:
>
> But what about "+" and "mod" and so forth? Package Text_IO.Integer_IO
> probably uses the predefined "mod" to format the number as a string.
> But the *spec* of that package doesn't say that -- it just says the
> string is formatted according to some rules. If the predefined "mod"
> did *not* reemerge, then a user-defined "mod" operator would break
> Text_IO.Integer_IO. You may say, "tough luck; that's the programmer's
> fault". But how should the semantics of Integer_IO be defined in the
> RM? Surely the use of "mod" there is an implementation detail.
As another interesting case, suppose that you declare an integer type T with
"mod" specified as abstract. If "mod" on the formal type is invoked from
the generic body, then either the instantiation Ada.Text_IO.Integer_IO(T)
would need to be rejected (a rather flagrant violation of the "contract
model") or else the predefined "mod" would need to reemerge.
next prev parent reply other threads:[~2002-07-25 15:46 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-07-24 5:33 Dispatching and generics - language lawyer question Grein, Christoph
2002-07-24 22:55 ` Robert A Duff
2002-07-25 15:46 ` Ben Brosgol [this message]
2002-07-29 20:38 ` Robert A Duff
2002-07-31 22:52 ` Dmitry A.Kazakov
2002-07-31 20:18 ` Robert A Duff
2002-08-02 1:15 ` Dmitry A.Kazakov
2002-08-01 16:30 ` Hyman Rosen
2002-08-02 23:42 ` Dmitry A.Kazakov
2002-08-02 15:49 ` Hyman Rosen
2002-08-02 17:48 ` Stephen Leake
2002-08-10 3:03 ` Warren W. Gay VE3WWG
2002-08-05 11:15 ` Dmitry A. Kazakov
2002-08-12 12:44 ` Robert Dewar
2002-08-13 2:00 ` Information Systems Annex was " Robert C. Leif
2002-08-13 8:17 ` Robert Dewar
2002-08-13 23:53 ` Information Systems Annex Robert C. Leif
2002-08-13 17:37 ` Information Systems Annex was RE: Dispatching and generics - language lawyer question Keith Thompson
2002-08-13 23:53 ` Robert C. Leif
2002-08-14 8:52 ` Keith Thompson
2002-08-14 21:53 ` Robert C. Leif
2002-08-15 9:31 ` Robert Dewar
2002-08-15 21:54 ` Decimal Floating point was " Robert C. Leif
2002-08-16 6:26 ` Keith Thompson
2002-08-16 16:26 ` Robert C. Leif
2002-08-16 18:17 ` Keith Thompson
2002-08-16 15:26 ` Robert Dewar
2002-08-16 15:29 ` Robert Dewar
2002-08-15 9:26 ` Robert Dewar
2002-08-15 16:17 ` Darren New
2002-08-15 17:25 ` David C. Hoos
2002-08-15 17:31 ` Darren New
2002-08-15 19:59 ` Frank J. Lhota
2002-08-15 17:39 ` tmoran
2002-08-15 19:18 ` Information Systems Annex was RE: Dispatching and generics - Larry Kilgallen
2002-08-15 18:41 ` Hyman Rosen
2002-08-16 15:49 ` Robert Dewar
2002-08-17 6:31 ` Simon Wright
2002-08-17 14:17 ` Robert Dewar
2002-08-15 21:54 ` Decimal Floating types was RE: Information Systems Annex was RE: Dispatching and generics - language lawyer question Robert C. Leif
2002-08-16 15:21 ` Robert Dewar
2002-08-16 16:15 ` Decimal Floating types Warren W. Gay VE3WWG
2002-08-17 10:52 ` Robert Dewar
2002-08-17 14:30 ` Warren W. Gay VE3WWG
2002-08-20 0:26 ` Robert Dewar
2002-08-20 2:35 ` SteveD
2002-08-22 18:15 ` Richard Riehle
2002-08-23 3:23 ` Robert Dewar
2002-08-16 15:47 ` Information Systems Annex (usefulness of Decimal Floats) Warren W. Gay VE3WWG
2002-08-17 10:54 ` Robert Dewar
2002-08-17 14:06 ` Warren W. Gay VE3WWG
2002-08-17 10:56 ` Robert Dewar
2002-08-17 14:12 ` Warren W. Gay VE3WWG
2002-08-17 19:04 ` Robert C. Leif
2002-08-20 0:25 ` Robert Dewar
2002-08-16 15:38 ` Information Systems Annex was RE: Dispatching and generics - language lawyer question Robert Dewar
2002-08-13 22:50 ` Randy Brukardt
2002-08-14 0:02 ` Robert A Duff
2002-07-25 0:40 ` Robert Dewar
-- strict thread matches above, loose matches on Subject: below --
2002-07-22 23:13 Adam Beneschan
2002-07-23 15:42 ` Stephen Leake
2002-07-24 15:37 ` Stephen Leake
replies disabled
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox