From: Martin Wodok <m.wodok@osb-ag.de>
To: gcc-help@gcc.gnu.org
Subject: Re: C++: No Warning for passing value > 255 as parameter to a function requiring "unsigned char"
Date: Tue, 26 Jul 2005 09:36:00 -0000 [thread overview]
Message-ID: <200507261115.45744.m.wodok@osb-ag.de> (raw)
In-Reply-To: <m3ll3yzynz.fsf@uniton.integrable-solutions.net>
Hi Gaby
hi Eljay,
thanks for your answer!
> Martin Wodok <m.wodok@osb-ag.de> writes:
> | Assigning 1000 is of course out of bounds for "unsigned char", thus the
>
> No, it is not. Unsigned integer types are modulo types; it is no overflow.
Yes, they're modulo types, that's why this is NOT an error, but I still think
that should be a WARNING. There're compilers like Tasking that throw a
warning out on that one, so I'm really searching for a way to enable a
warning for that one (maybe something like the warning -Wconversion), and not
some extra code (Eljay, thanks anyway!!), because it should work on existing
code and I don't want to get code-explosion (we're working embedded) just
because some range-check that could be done by the compiler...
So it seems there's really no way for GCC to warn here?
Thanks again Gaby and Eljay,
/\/\artin
--
Dipl.-Inf. Martin Wodok
OSB AG Ingenieur- und IT-Dienstleistungen
Klenzestraße 38
80469 München
Telefon: +49 (0)89/23 88 57-48
Telefax: +49 (0)89/23 88 57-40
next prev parent reply other threads:[~2005-07-26 9:36 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-07-22 13:51 Martin Wodok
2005-07-22 14:47 ` Gabriel Dos Reis
2005-07-26 9:36 ` Martin Wodok [this message]
2005-07-26 14:28 ` Eljay Love-Jensen
2005-07-26 21:54 ` Gabriel Dos Reis
2005-07-27 0:44 ` Sisyphus
2005-07-22 15:22 ` Eljay Love-Jensen
2005-07-22 15:24 ` Eljay Love-Jensen
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