From: Gabriel Dos Reis <gdr@integrable-solutions.net>
To: Martin Wodok <m.wodok@osb-ag.de>
Cc: 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 21:54:00 -0000 [thread overview]
Message-ID: <m3mzo944me.fsf@uniton.integrable-solutions.net> (raw)
In-Reply-To: <200507261115.45744.m.wodok@osb-ag.de>
Martin Wodok <m.wodok@osb-ag.de> writes:
| 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,
The argument was that it makes sense to issue a warning when the the
code is dubious -- not just an error. However, in this case, modulo
arithmetic for unsigned int is a characteristic propery.
Consequently, it does not make much sense to warn about it.
-- Gaby
next prev parent reply other threads:[~2005-07-26 21:54 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
2005-07-26 14:28 ` Eljay Love-Jensen
2005-07-26 21:54 ` Gabriel Dos Reis [this message]
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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