From: Pierre Weis <Pierre.Weis@inria.fr>
To: Markus Mottl <mottl@miss.wu-wien.ac.at>
Cc: caml-list@inria.fr
Subject: Re: cyclic value construction ("let rec")
Date: Thu, 6 Apr 2000 15:18:19 +0200 [thread overview]
Message-ID: <20000406151819.42281@pauillac.inria.fr> (raw)
In-Reply-To: <200004031257.OAA29741@miss.wu-wien.ac.at>; from Markus Mottl on Mon, Apr 03, 2000 at 02:57:19PM +0200
> Type "'a node" is immutable from the outside. However, exploiting the
> undocumented (good reason for this ;-) type casting features of OCaml,
> one can cheat and define an identical type within a local module -
> which is mutable!
This certainly suggests to allow the export of an immutable view of a
record type with mutable fields. This way you could do the
initialization in a safe way (no magic) using side effects, and still
export a safe immutable type to the external world.
--
Pierre Weis
INRIA, Projet Cristal, http://pauillac.inria.fr/~weis
next prev parent reply other threads:[~2000-04-06 13:55 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-03-30 20:12 Benoit Deboursetty
2000-04-03 12:57 ` Markus Mottl
2000-04-06 13:18 ` Pierre Weis [this message]
2000-04-06 13:34 ` Markus Mottl
2000-04-06 14:25 ` Xavier Leroy
2000-04-06 15:12 ` Markus Mottl
2000-04-10 0:03 ` Pierre Weis
2000-04-10 1:41 ` Markus Mottl
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