From: Jon Harrop <jon@ffconsultancy.com>
To: caml-list@yquem.inria.fr
Subject: Re: [Caml-list] C++/C# inheritance is bad?
Date: Sat, 17 Jan 2009 16:59:36 +0000 [thread overview]
Message-ID: <200901171659.36732.jon@ffconsultancy.com> (raw)
In-Reply-To: <D035AED0-188D-4EF5-BB9A-BE39537B1A70@osu.edu>
On Saturday 17 January 2009 14:35:22 Kuba Ober wrote:
> I wonder how such a hierarchy would be implemented in a natural way
> in OCaml?
Assuming you stick with accepted wisdom, you would mimic the same effects
using OCaml's object system, just as LablGTK does. However, you have picked
the only pedagogical OO example: GUI widgets.
In contrast, metaprogramming is the pedagogical example for algebraic
datatypes. There is almost no need for users to extend the abstract syntax
tree but there is huge value in being able to rewrite expressions using
pattern matching. There is an idiomatic OOP solution to this problem that
involves visitor patterns and so forth but it is comparatively verbose,
obfuscated and unmaintainable.
--
Dr Jon Harrop, Flying Frog Consultancy Ltd.
http://www.ffconsultancy.com/?e
next prev parent reply other threads:[~2009-01-17 16:55 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-16 15:18 Kuba Ober
2009-01-16 15:58 ` [Caml-list] " Richard Jones
2009-01-16 16:28 ` On the benefits of OO, Was: " Jan Kybic
2009-01-17 12:40 ` Oliver Bandel
2009-01-16 18:27 ` Raoul Duke
2009-01-16 21:42 ` Kuba Ober
2009-01-17 3:14 ` Sashan Govender
2009-01-17 14:07 ` Kuba Ober
2009-01-18 6:24 ` Stefano Zacchiroli
2009-01-17 13:27 ` Jon Harrop
2009-01-17 14:35 ` Kuba Ober
2009-01-17 16:59 ` Jon Harrop [this message]
2009-01-17 21:22 ` Kuba Ober
2009-01-17 22:17 ` Jon Harrop
2009-01-17 23:29 ` David Teller
2009-01-17 23:49 ` Jon Harrop
2009-01-19 16:22 ` Visitor in OCaml [was Re: [Caml-list] C++/C# inheritance is bad?] Yoann Padioleau
2009-01-19 16:41 ` blue storm
2009-01-19 17:49 ` Richard Jones
2009-01-19 17:52 ` Visitor in OCaml Christophe TROESTLER
2009-01-21 20:09 ` Yoann Padioleau
2009-01-22 4:03 ` [Caml-list] " Yaron Minsky
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