From mboxrd@z Thu Jan  1 00:00:00 1970
Received: (from majordomo@localhost) by pauillac.inria.fr (8.7.6/8.7.3) id MAA19650; Fri, 4 Oct 2002 12:03:03 +0200 (MET DST)
X-Authentication-Warning: pauillac.inria.fr: majordomo set sender to owner-caml-list@pauillac.inria.fr using -f
Received: from concorde.inria.fr (concorde.inria.fr [192.93.2.39]) by pauillac.inria.fr (8.7.6/8.7.3) with ESMTP id MAA19634 for <caml-list@pauillac.inria.fr>; Fri, 4 Oct 2002 12:03:02 +0200 (MET DST)
Received: from pauillac.inria.fr (pauillac.inria.fr [128.93.11.35])
	by concorde.inria.fr (8.11.1/8.11.1) with ESMTP id g94A31504932;
	Fri, 4 Oct 2002 12:03:01 +0200 (MET DST)
Received: (from weis@localhost) by pauillac.inria.fr (8.7.6/8.7.3) id MAA19581; Fri, 4 Oct 2002 12:03:00 +0200 (MET DST)
From: Pierre Weis <pierre.weis@inria.fr>
Message-Id: <200210041003.MAA19581@pauillac.inria.fr>
Subject: Re: [Caml-list] Pattern matching and strings (and a mini-bug in Scanf)
In-Reply-To: <3D9D6008.9010206@baretta.com> from Alessandro Baretta at "Oct 4, 102 11:31:52 am"
To: alex@baretta.com (Alessandro Baretta)
Date: Fri, 4 Oct 2002 12:03:00 +0200 (MET DST)
Cc: pierre.weis@inria.fr, caml-list@inria.fr
X-Mailer: ELM [version 2.4ME+ PL28 (25)]
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Sender: owner-caml-list@pauillac.inria.fr
Precedence: bulk

[...]
> I probably did not consider the problem thoroughly enough. I 
> was expecting "%[]]" to match a range of ']' and "%[]" to 
> match the empty range of characters (which is a rather 
> useless construct anyway, as you point out). Now I realize 
> this would render almost impossible the interpretation of a 
> such a format as "%[]abcdefg...": you simply never know if 
> it is the prefix of a range conversion specifier or a empty 
> range conversion specifier followed by a string constant 
> specifier.
> 
> While the empty range conversion is admittedly useless, a 
> full range conversion is a whole different story. Coding it 
> as "%[\000-\255]" is possible, but maybe it would useful to 
> add a "%z" specifier to mean "read till the end of input".
> 
> What do you think?
> 
> Alex

I should say that I am reluctant to had a special typing rule for the
new specifier you proposed, when "%[\000-\255]" does perfectly the job
and does not require any addition to the type-checker nor to the
implementation of Scanf.

Pierre Weis

INRIA, Projet Cristal, Pierre.Weis@inria.fr, http://pauillac.inria.fr/~weis/


-------------------
To unsubscribe, mail caml-list-request@inria.fr Archives: http://caml.inria.fr
Bug reports: http://caml.inria.fr/bin/caml-bugs FAQ: http://caml.inria.fr/FAQ/
Beginner's list: http://groups.yahoo.com/group/ocaml_beginners