From: Alain Frisch <Alain.Frisch@inria.fr>
To: Christophe TROESTLER <debian00@tiscali.be>
Cc: "O'Caml Mailing List" <caml-list@inria.fr>
Subject: Re: [Caml-list] Type abstraction and (polymorphic) equality
Date: Thu, 30 Jun 2005 14:19:46 +0200 [thread overview]
Message-ID: <42C3E362.6070606@inria.fr> (raw)
In-Reply-To: <20050629.023111.15476874.debian00@tiscali.be>
Christophe TROESTLER wrote:
> I'll be glad to hear similar experiences and comments about the above
> ideas.
In my opinion, it is a good idea to always define one's own comparison
(and hash) function. You know better than the compiler and the runtime
system how your data is to be compared, which details should be ignored,
how to deal with cycles, and so on. In addition, your custom functions
will be more efficient than the generic ones. There are several tools to
generate automatically comparison functions from type declarations.
I often redefine the comparison operators (=), (<=), ... with dummy
types at the beginning of modules to avoid using them by inadvertence
(this does not catch uses of List.mem-like functions, though).
-- Alain
next prev parent reply other threads:[~2005-06-30 12:19 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-06-29 0:31 Christophe TROESTLER
2005-06-29 9:12 ` [Caml-list] " Jon Harrop
2005-06-29 10:06 ` Andreas Rossberg
2005-06-29 13:32 ` Christophe TROESTLER
2005-06-29 23:39 ` brogoff
2005-06-30 7:46 ` Christophe Raffalli
2005-06-29 20:27 ` Christophe TROESTLER
2005-06-29 20:37 ` John Skaller
2005-06-30 9:53 ` Andreas Rossberg
2005-06-30 17:08 ` brogoff
2005-06-30 17:22 ` Andreas Rossberg
2005-06-30 19:56 ` John Skaller
2005-07-01 12:49 ` Andreas Rossberg
2005-06-29 9:45 ` Jean-Christophe Filliatre
2005-06-29 17:33 ` William Lovas
2005-06-29 18:08 ` sejourne_kevin
2005-06-30 9:51 ` Andreas Rossberg
2005-06-30 19:54 ` John Skaller
2005-06-30 22:24 ` Alain Frisch
2005-06-30 12:19 ` Alain Frisch [this message]
2005-06-30 12:32 ` padiolea
2005-06-30 12:57 ` Alain Frisch
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