linux-kernel - Re: [RFC][PATCH] A generic boolean (version 4)

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Message-ID: <44C3DB28.2090003@garzik.org>
Date:	Sun, 23 Jul 2006 16:25:12 -0400
From:	Jeff Garzik <jeff@...zik.org>
To:	Jan Engelhardt <jengelh@...ux01.gwdg.de>
CC:	ricknu-0@...dent.ltu.se, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...l.org>,
	Alexey Dobriyan <adobriyan@...il.com>,
	Vadim Lobanov <vlobanov@...akeasy.net>,
	Shorty Porty <getshorty_@...mail.com>,
	Peter Williams <pwil3058@...pond.net.au>,
	Michael Buesch <mb@...sch.de>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Stefan Richter <stefanr@...6.in-berlin.de>, larsbj@...lik.net
Subject: Re: [RFC][PATCH] A generic boolean (version 4)

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


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