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Date: Fri, 6 Jul 2001 18:38:04 +0100
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: David Woodhouse <dwmw2@infradead.org>,
        Daniel Phillips <phillips@bonn-fries.net>,
        Davide Libenzi <davidel@xmailserver.org>, linux-kernel@vger.kernel.org
Subject: Re: linux/macros.h(new) and linux/list.h(mod) ...
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From: Neil Booth <neil@daikokuya.demon.co.uk>
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Alan Cox wrote:-

> #define min(a,b) __magic_minfoo(a,b, __var##__LINE__, __var2##__LINE__)
> 
> #define __magic_minfoo(A,B,C,D) \
> 	{ typeof(A) C = (A)  .... }

No, that's buggy.  You need an extra level of indirection to expand
__LINE__.  Arguments to ## are inserted in-place without expansion.

Neil.
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