From: Pierre Weis <pierre.weis@inria.fr>
To: alan.schmitt@polytechnique.org (Alan Schmitt)
Cc: caml-list@inria.fr
Subject: Re: [Caml-list] scanf and %2c
Date: Thu, 19 Jun 2003 10:57:14 +0200 (MET DST) [thread overview]
Message-ID: <200306190857.KAA12115@pauillac.inria.fr> (raw)
In-Reply-To: <20030613202820.GM9367@alan-schm1p> from Alan Schmitt at "Jun 13, 103 04:28:20 pm"
Bonjour Alan,
> As I needed to parse some string representing time (of the form hh:mm),
[...]
Welcome to the dates and time users' camp! Too bad that there is no
support for that kind of stuff in our favorite language :(
> So shouldn't there be a warning (or an error) when using a size field
> with chars ?
>
> Alan
We must be a bit more precise than that: we should check that the size
field is positive and lesser or equal than 1.
In effect:
- a 0 sized char scanf specification has a special useful meaning (see
Scanf.mli for details): it means ``pick'' the current character
without reading it (in order to test its value and decide what to do
next),
- a 1 sized char scanf specification seems to be harmless.
I will try to had a static check in the type-checker (the usual Caml
way), orelse a runtime failure in Scanf (the usual way of more
conventional programming languages).
Amicalement,
Pierre Weis
INRIA, Projet Cristal, Pierre.Weis@inria.fr, http://pauillac.inria.fr/~weis/
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next prev parent reply other threads:[~2003-06-19 8:57 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-06-13 20:28 Alan Schmitt
2003-06-19 8:57 ` Pierre Weis [this message]
2003-06-19 15:06 ` Nicolas George
2003-06-20 9:06 ` Pierre Weis
2003-06-20 10:45 ` Alan Schmitt
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