From: Matthew Heaney <matthew_heaney@acm.org>
Subject: Re: Naming of Tagged Types and Associated Packages
Date: 1998/08/04
Date: 1998-08-04T00:00:00+00:00 [thread overview]
Message-ID: <m3iuk9k193.fsf@mheaney.ni.net> (raw)
In-Reply-To: 35C2E4C9.35441249@wanadoo.fr
Jean-Pierre Rosen <rosen.adalog@wanadoo.fr> writes:
> Of course, we are discussing style here, so it's a matter of taste.
> As I mentionned before, I agree with you (and generally use) a "closed"
> style, and I try to keep inheritance as hidden as possible. However the
> purpose of this thread was to discuss a notation for those who want pure
> OO programming, and pure OO means a lot of visibility! Quoting Booch
> (from memory):
> "There is a very real tension between encapsulation and inheritence. To
> a large degree, inheritance exposes the secrets of the inherited class,
> sometimes including their inside view".
A great quote that hints at the pitfalls of inheritance from a systems
point of view. Visibility implies coupling, and coupling is bad. Very,
very bad.
An even better source is your own ACM paper "What orientation should Ada
objects take?" It bravely challenges current dogma about inheritance as
a mechanism for the composition of abstractions. (Thank you - I was
cheering when I read it!)
Everyone should also read "The Architecture of Complexity," by Herb
Simon. It appears as a chapter in his book Sciences of the Artificial.
Yes, the question might be "What naming convention do I use to effect
pure OO programming in Ada 95?" But maybe we should be asking ourselves
instead, "What is the simplest way to construct software systems using
Ada 95?"
If the system is modifiable and extensible, with minimal coupling among
the parts, then should we really care whether a "pure OO" approach was
used? Who even knows what "pure OO" means?
next prev parent reply other threads:[~1998-08-04 0:00 UTC|newest]
Thread overview: 138+ messages / expand[flat|nested] mbox.gz Atom feed top
1998-07-16 0:00 Naming of Tagged Types and Associated Packages taashlo
1998-07-25 0:00 ` Matthew Heaney
1998-07-25 0:00 ` Jean-Pierre Rosen
1998-07-25 0:00 ` Brian Rogoff
1998-07-26 0:00 ` Matthew Heaney
1998-07-26 0:00 ` Matthew Heaney
1998-07-26 0:00 ` nabbasi
1998-07-26 0:00 ` Robert Dewar
1998-07-26 0:00 ` Matthew Heaney
1998-07-27 0:00 ` dennison
1998-07-27 0:00 ` Stephen Leake
1998-07-27 0:00 ` dennison
1998-07-27 0:00 ` Brian Rogoff
1998-07-28 0:00 ` dennison
1998-07-28 0:00 ` Brian Rogoff
1998-07-28 0:00 ` Brian Rogoff
1998-07-29 0:00 ` Matthew Heaney
1998-07-29 0:00 ` Brian Rogoff
1998-07-28 0:00 ` dennison
1998-07-29 0:00 ` Matthew Heaney
1998-07-29 0:00 ` Chris Brand
1998-07-30 0:00 ` Matthew Heaney
1998-07-30 0:00 ` dennison
1998-07-30 0:00 ` Matthew Heaney
1998-07-30 0:00 ` dennison
1998-08-01 0:00 ` Simon Wright
1998-08-02 0:00 ` Matthew Heaney
1998-08-03 0:00 ` dennison
1998-08-03 0:00 ` Matthew Heaney
1998-08-04 0:00 ` dennison
1998-08-04 0:00 ` Jean-Pierre Rosen
1998-08-04 0:00 ` Brian Rogoff
1998-08-05 0:00 ` Don Harrison
1998-08-05 0:00 ` Brian Rogoff
1998-08-07 0:00 ` doylep
1998-08-07 0:00 ` Brian Rogoff
1998-08-08 0:00 ` Matthew Heaney
1998-08-10 0:00 ` doylep
1998-08-10 0:00 ` Brian Rogoff
1998-08-10 0:00 ` John Volan
1998-08-10 0:00 ` John Volan
1998-08-11 0:00 ` doylep
1998-08-11 0:00 ` Brian Rogoff
1998-08-13 0:00 ` Robert A Duff
1998-08-13 0:00 ` Brian Rogoff
1998-09-01 0:00 ` Matthew Heaney
1998-09-01 0:00 ` Dale Stanbrough
1998-09-01 0:00 ` Matthew Heaney
1998-09-01 0:00 ` Bob Collins
1998-09-02 0:00 ` Matthew Heaney
1998-09-04 0:00 ` John G. Volan
1998-08-11 0:00 ` Don Harrison
1998-08-11 0:00 ` Pat Rogers
1998-08-11 0:00 ` Don Harrison
1998-09-01 0:00 ` Matthew Heaney
1998-08-13 0:00 ` Robert A Duff
1998-08-13 0:00 ` Brian Rogoff
1998-08-15 0:00 ` Don Harrison
1998-08-15 0:00 ` Jean-Pierre Rosen
1998-08-18 0:00 ` Don Harrison
1998-08-14 0:00 ` Don Harrison
1998-08-17 0:00 ` doylep
1998-08-19 0:00 ` Don Harrison
1998-08-12 0:00 ` Don Harrison
1998-08-08 0:00 ` Matthew Heaney
1998-08-08 0:00 ` John G. Volan
1998-08-09 0:00 ` Matthew Heaney
1998-08-10 0:00 ` John G. Volan
1998-08-11 0:00 ` John Volan
1998-08-11 0:00 ` Don Harrison
1998-08-11 0:00 ` geoff
1998-08-31 0:00 ` Matthew Heaney
1998-08-31 0:00 ` Tucker Taft
1998-09-06 0:00 ` John G. Volan
1998-09-06 0:00 ` Matthew Heaney
1998-09-04 0:00 ` John G. Volan
1998-09-05 0:00 ` Matthew Heaney
1998-09-05 0:00 ` John G. Volan
1998-09-04 0:00 ` John G. Volan
1998-09-05 0:00 ` John G. Volan
1998-09-06 0:00 ` Matthew Heaney
1998-09-06 0:00 ` Matthew Heaney
1998-09-04 0:00 ` John G. Volan
1998-09-06 0:00 ` Matthew Heaney
1998-09-06 0:00 ` John G. Volan
1998-09-06 0:00 ` John G. Volan
1998-09-06 0:00 ` Brian Rogoff
1998-09-06 0:00 ` John G. Volan
1998-09-07 0:00 ` Brian Rogoff
1998-09-07 0:00 ` John G. Volan
1998-09-16 0:00 ` Matthew Heaney
1998-09-05 0:00 ` John G. Volan
1998-09-05 0:00 ` John G. Volan
1998-08-11 0:00 ` doylep
1998-08-07 0:00 ` Don Harrison
1998-08-05 0:00 ` Matthew Heaney
1998-08-07 0:00 ` Don Harrison
1998-08-13 0:00 ` Robert A Duff
1998-08-14 0:00 ` Don Harrison
1998-08-14 0:00 ` adam
1998-08-05 0:00 ` Static Polymorphism (Was Re: Naming of Tagged Types...) Brian Rogoff
1998-08-06 0:00 ` Matthew Heaney
1998-08-06 0:00 ` Brian Rogoff
1998-07-28 0:00 ` Naming of Tagged Types and Associated Packages Norman H. Cohen
1998-07-28 0:00 ` Stephen Leake
1998-07-28 0:00 ` Matthew Heaney
1998-07-28 0:00 ` Matthew Heaney
1998-07-28 0:00 ` Jean-Pierre Rosen
1998-07-28 0:00 ` Matthew Heaney
1998-07-28 0:00 ` dennison
1998-07-29 0:00 ` Matthew Heaney
1998-07-30 0:00 ` Robert Dewar
1998-07-30 0:00 ` Matthew Heaney
1998-08-06 0:00 ` Robert A Duff
1998-08-06 0:00 ` Matthew Heaney
1998-08-06 0:00 ` Tucker Taft
1998-08-31 0:00 ` Matthew Heaney
1998-07-27 0:00 ` Jean-Pierre Rosen
1998-07-28 0:00 ` Matthew Heaney
1998-07-28 0:00 ` Jean-Pierre Rosen
1998-07-28 0:00 ` dennison
1998-07-29 0:00 ` Jean-Pierre Rosen
1998-07-29 0:00 ` dennison
1998-07-29 0:00 ` Jean-Pierre Rosen
1998-07-30 0:00 ` dennison
1998-07-30 0:00 ` Jean-Pierre Rosen
1998-07-29 0:00 ` Robert I. Eachus
1998-07-30 0:00 ` Jean-Pierre Rosen
1998-07-30 0:00 ` Robert I. Eachus
1998-07-31 0:00 ` Jean-Pierre Rosen
1998-07-31 0:00 ` Robert I. Eachus
1998-08-01 0:00 ` Jean-Pierre Rosen
1998-08-04 0:00 ` Matthew Heaney [this message]
1998-08-04 0:00 ` Jean-Pierre Rosen
1998-08-10 0:00 ` Robert I. Eachus
1998-07-30 0:00 ` Matthew Heaney
-- strict thread matches above, loose matches on Subject: below --
1998-07-26 0:00 tmoran
1998-07-27 0:00 ` dennison
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