From: "Magnus Naeslund\(f\)" <mag@fbab.net>
To: <raybry@timesn.com>, "Tim Walberg" <twalberg@mindspring.com>,
<linux-kernel@vger.kernel.org>
Subject: Re: macro conflict
Date: Thu, 23 Aug 2001 22:16:34 +0200 [thread overview]
Message-ID: <03fc01c12c10$8155b060$020a0a0a@totalmef> (raw)
In-Reply-To: <20010823143440.G20693@mindspring.com> <3B85615A.58920036@timesn.com>
From: <raybry@timesn.com>
> Without digging through the archives to see if this has already
> been suggested (if so, I apologize), why can't the following be done:
>
> min(x,y) = ({typeof((x)) __x=(x), __y=(y); (__x < __y) ? __x : __y})
>
> That gets you the correct "evaluate the args once" semantics and gives
> you control over typing (the comparison is done in the type of the
> first argument) and we don't have to change a zillion drivers.
>
> (typeof() is a gcc extension.)
>
But then again, how do you know it's the type of x we want, maybe we want
type of y, that is and signed char (not an int like x).
Talk about hidden buffer overflow stuff :)
Magnus
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Programmer/Networker [|] Magnus Naeslund
PGP Key: http://www.genline.nu/mag_pgp.txt
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next prev parent reply other threads:[~2001-08-23 20:14 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-08-23 19:03 macro conflict J. Imlay
2001-08-23 19:21 ` Alan Cox
2001-08-23 19:34 ` Tim Walberg
2001-08-23 20:01 ` Alan Cox
2001-08-23 20:02 ` raybry
2001-08-23 20:16 ` Magnus Naeslund(f) [this message]
2001-08-23 20:27 ` Alan Cox
2001-08-23 20:29 ` Magnus Naeslund(f)
2001-08-23 23:18 ` Andrew Cannon
2001-08-23 23:37 ` Magnus Naeslund(f)
2001-08-23 23:35 ` Roman Zippel
2001-08-24 1:42 ` Camiel Vanderhoeven
2001-08-24 13:03 ` David Woodhouse
2001-08-24 13:15 ` Keith Owens
2001-08-24 13:17 ` David Woodhouse
2001-08-24 14:20 ` Bill Pringlemeir
2001-08-24 21:17 ` Roman Zippel
2001-08-24 13:34 ` Richard B. Johnson
2001-08-24 18:20 ` David Wagner
2001-08-24 17:25 ` Alex Bligh - linux-kernel
2001-08-24 17:34 ` David Woodhouse
2001-08-24 18:12 ` Bill Pringlemeir
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