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Date: Sun, 23 Jul 2006 16:25:12 -0400
From: Jeff Garzik <jeff@garzik.org>
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To: Jan Engelhardt <jengelh@linux01.gwdg.de>
CC: ricknu-0@student.ltu.se, linux-kernel@vger.kernel.org,
       Andrew Morton <akpm@osdl.org>, Alexey Dobriyan <adobriyan@gmail.com>,
       Vadim Lobanov <vlobanov@speakeasy.net>,
       Shorty Porty <getshorty_@hotmail.com>,
       Peter Williams <pwil3058@bigpond.net.au>, Michael Buesch <mb@bu3sch.de>,
       Pekka Enberg <penberg@cs.helsinki.fi>,
       Stefan Richter <stefanr@s5r6.in-berlin.de>, larsbj@gullik.net
Subject: Re: [RFC][PATCH] A generic boolean (version 4)
References: <1153341500.44be983ca1407@portal.student.luth.se> <1153669750.44c39a7607a30@portal.student.luth.se> <Pine.LNX.4.61.0607231805210.26413@yvahk01.tjqt.qr>
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Jan Engelhardt wrote:
>> +#undef false
>> +#undef true
>> +
>> +enum {
>> +	false	= 0,
>> +	true	= 1
>> +};
>> +
>> +#define false false
>> +#define true true 
> 
> Can someone please tell me what advantage 'define true true' is going to
> bring, besides than being able to '#ifdef true'?

It

(a) makes type information available to the C compiler, where a plain 
#define does not.
(b) handles all '#ifndef true' statements properly

	Jeff