From: maa@liacc.up.pt (Mário Amado Alves)
Subject: Re: MI in Ada 200X (was: Suggestion for Ada 200x - Interface inheritance)
Date: 29 May 2003 05:06:38 -0700
Date: 2003-05-29T12:06:38+00:00 [thread overview]
Message-ID: <4a4de33a.0305290406.567b7451@posting.google.com> (raw)
In-Reply-To: 3ED56CA9.6050301@attbi.com
""Everybody wants class MI. The reasons it was left out of Ada 95 and
83, the cons, are weaker than the pros.""
"Convince me :-) Seriously what are the pros and cons of MI." (Preben)
The cons include the (aledged) "implementation burden" (Tucker Taft).
"I must not be everybody. Ada currently supports the mix-in model of
multiple inheritance." (Robert)
Sure. I was talking about *class* MI. (Tucker calls it "linguistic".)
The pros include "naturalness" of expression, occuring both at
creation
type Child is new Mother, Father;
and at selection
Do (A_Child.Mother_Feature)
Do (A_Child.Father_Feature)
And sure it's not "everybody" who wants it. But many folks do and
recurrently voice it. It's an unsettled issue. Kind of as exceptions
as tagged types (AE'2001). I guess it's Ada class wide programming
felt as its most natural OO idiom.
I wouldn't mind having it as an extension defined in a specialized
annex. There is already a number of 'standard' Ada subsets (DSA,
SPARK, Kernel Ada). Why not a superset?
pragma Multiple_Inheritance (Child); -- :-)
next prev parent reply other threads:[~2003-05-29 12:06 UTC|newest]
Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-05-23 23:05 Suggestion for Ada 200x - Interface inheritance Steve
2003-05-24 1:02 ` Robert A Duff
2003-05-29 16:47 ` Brian Gaffney
2003-06-01 10:29 ` Craig Carey
2003-05-24 12:35 ` Wojtek Narczynski
2003-05-24 17:53 ` Georg Bauhaus
2003-05-25 13:11 ` Wojtek Narczynski
2003-05-24 22:07 ` Robert A Duff
2003-05-25 14:12 ` Wojtek Narczynski
2003-05-25 17:53 ` Jeffrey Carter
2003-05-25 18:47 ` Wesley Groleau
2003-05-25 19:42 ` Hyman Rosen
2003-05-26 7:53 ` Wojtek Narczynski
2003-05-26 15:50 ` Hyman Rosen
2003-05-27 18:41 ` Wojtek Narczynski
2003-05-27 18:55 ` Wesley Groleau
2003-05-27 19:13 ` Hyman Rosen
2003-05-28 13:07 ` Wojtek Narczynski
2003-05-28 13:28 ` Jean-Pierre Rosen
2003-05-29 0:58 ` Hyman Rosen
2003-05-28 22:13 ` Robert A Duff
2003-05-28 23:50 ` Hyman Rosen
2003-05-29 9:17 ` Dmitry A. Kazakov
2003-05-29 13:31 ` Wojtek Narczynski
2003-05-26 7:51 ` Wojtek Narczynski
2003-05-25 1:33 ` Steve
2003-05-25 10:37 ` Simon Wright
2003-05-26 7:54 ` Jean-Pierre Rosen
2003-05-26 10:07 ` Preben Randhol
2003-05-26 16:32 ` Pascal Obry
2003-05-26 16:59 ` Preben Randhol
2003-06-01 10:53 ` Craig Carey
2003-06-01 12:17 ` Preben Randhol
2003-05-26 7:49 ` Jean-Pierre Rosen
2003-06-02 9:01 ` Wojtek Narczynski
2003-05-28 13:57 ` MI in Ada 200X (was: Suggestion for Ada 200x - Interface inheritance) Mário Amado Alves
2003-05-28 15:05 ` Preben Randhol
2003-05-29 0:54 ` MI in Ada 200X Hyman Rosen
2003-05-29 17:38 ` Stephen Leake
2003-05-30 7:20 ` Preben Randhol
2003-05-29 9:17 ` MI in Ada 200X (was: Suggestion for Ada 200x - Interface inheritance) Dmitry A. Kazakov
2003-05-29 22:56 ` MI in Ada 200X Hyman Rosen
2003-05-30 7:39 ` Dmitry A. Kazakov
2003-05-30 13:11 ` Hyman Rosen
2003-05-30 14:29 ` Robert A Duff
2003-05-30 14:51 ` Hyman Rosen
2003-05-30 15:11 ` Mark A. Biggar
2003-05-30 15:51 ` Hyman Rosen
2003-05-30 22:38 ` John Griffiths
2003-05-30 2:50 ` Wesley Groleau
2003-05-30 7:38 ` Dmitry A. Kazakov
2003-05-30 12:20 ` Karel Miklav
2003-05-30 12:59 ` Hyman Rosen
2003-05-30 14:02 ` Georg Bauhaus
2003-05-30 14:04 ` Lutz Donnerhacke
2003-05-30 18:45 ` Georg Bauhaus
2003-05-30 15:02 ` Hyman Rosen
2003-05-30 19:14 ` Georg Bauhaus
2003-05-30 19:40 ` Hyman Rosen
2003-05-30 19:31 ` Wojtek Narczynski
2003-05-30 22:42 ` John Griffiths
2003-05-31 9:27 ` Dmitry A. Kazakov
2003-05-31 13:53 ` Martin Krischik
2003-06-01 9:18 ` Dmitry A. Kazakov
2003-05-30 8:28 ` Mário Amado Alves
2003-05-30 8:46 ` MI in Ada 200X (was: Suggestion for Ada 200x - Interface inheritance) Preben Randhol
2003-05-31 10:17 ` Dmitry A. Kazakov
2003-05-31 13:48 ` Preben Randhol
2003-05-31 17:21 ` Dmitry A. Kazakov
2003-05-29 0:54 ` MI in Ada 200X Hyman Rosen
2003-05-29 2:13 ` MI in Ada 200X (was: Suggestion for Ada 200x - Interface inheritance) Robert I. Eachus
2003-05-29 12:06 ` Mário Amado Alves [this message]
2003-05-31 19:58 ` Chad R. Meiners
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