From: Robert Fischer <robert@fischerventure.com>
To: skaller <skaller@users.sourceforge.net>
Cc: Arnaud Spiwack <aspiwack@lix.polytechnique.fr>, caml-list@yquem.inria.fr
Subject: Re: [Caml-list] Smells like duck-typing
Date: Thu, 18 Oct 2007 14:55:25 -0500 [thread overview]
Message-ID: <4717BA2D.6000800@fischerventure.com> (raw)
In-Reply-To: <1192729631.5999.103.camel@rosella.wigram>
> But that never happens with mutators because you cannot
> HAVE any additional invariants. The derived type has
> to have exactly the same set of values as the base,
> in which case you cannot have any new interesting
> methods -- any method you have can always be defined
> in terms of the characteristic methods already in
> the base (assuming the whole public state is accessible
> of course).
>
This is why you 1) define a base class which has a very loose set of
invariants or 2) obscure state from inheriting classes.
~~ Robert.
next prev parent reply other threads:[~2007-10-18 19:55 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-17 13:35 Dario Teixeira
2007-10-17 14:13 ` [Caml-list] " Arnaud Spiwack
2007-10-17 14:47 ` Dario Teixeira
2007-10-17 14:25 ` Daniel Bünzli
2007-10-17 15:03 ` skaller
2007-10-17 15:13 ` Dario Teixeira
2007-10-17 15:25 ` Arnaud Spiwack
2007-10-17 15:32 ` Daniel Bünzli
2007-10-17 16:21 ` Chris King
2007-10-18 7:28 ` Stefano Zacchiroli
2007-10-18 8:33 ` [ANN] pa_oo and pa_polymap for 3.10 (Re: [Caml-list] Smells like duck-typing) Jacques Garrigue
2007-10-17 16:57 ` [Caml-list] Smells like duck-typing skaller
2007-10-17 16:52 ` skaller
2007-10-17 16:59 ` Robert Fischer
2007-10-17 14:33 ` Chris King
2007-10-17 14:59 ` Dario Teixeira
2007-10-17 15:24 ` Vincent Aravantinos
2007-10-17 15:26 ` Zheng Li
2007-10-18 16:13 ` Zheng Li
2007-10-18 16:37 ` [Caml-list] " William D. Neumann
2007-10-19 0:58 ` Jacques Garrigue
2007-10-17 19:59 ` [Caml-list] " Richard Jones
2007-10-17 20:24 ` Dario Teixeira
2007-10-18 7:37 ` Stefano Zacchiroli
2007-10-18 10:31 ` Dario Teixeira
2007-10-18 10:37 ` Stefano Zacchiroli
2007-10-18 13:28 ` Robert Fischer
2007-10-18 14:10 ` Dario Teixeira
2007-10-18 14:18 ` Brian Hurt
2007-10-18 14:29 ` Arnaud Spiwack
2007-10-18 14:45 ` Brian Hurt
2007-10-18 15:02 ` Arnaud Spiwack
2007-10-18 15:07 ` Robert Fischer
2007-10-18 15:14 ` Arnaud Spiwack
2007-10-18 16:39 ` skaller
2007-10-18 16:49 ` Arnaud Spiwack
2007-10-18 17:47 ` skaller
2007-10-18 19:55 ` Robert Fischer [this message]
2007-10-18 16:22 ` skaller
2007-10-18 16:30 ` Dario Teixeira
2007-10-18 14:58 ` Robert Fischer
2007-10-18 15:11 ` William D. Neumann
2007-10-18 15:47 ` Loup Vaillant
2007-10-18 16:08 ` William D. Neumann
2007-10-19 13:08 ` Ed Keith
2007-10-18 16:24 ` Dario Teixeira
2007-10-18 16:35 ` Vincent Aravantinos
2007-10-18 16:43 ` Brian Hurt
2007-10-18 17:04 ` William D. Neumann
2007-10-18 17:05 ` Dario Teixeira
2007-10-18 17:22 ` Brian Hurt
2007-10-18 17:58 ` Dario Teixeira
2007-10-18 15:42 ` Vincent Aravantinos
[not found] <47161E3B.3060704@tsc.uc3m.es>
2007-10-17 15:01 ` Dario Teixeira
2007-10-17 20:20 ` Alain Frisch
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4717BA2D.6000800@fischerventure.com \
--to=robert@fischerventure.com \
--cc=aspiwack@lix.polytechnique.fr \
--cc=caml-list@yquem.inria.fr \
--cc=skaller@users.sourceforge.net \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).