Re: The or operator and the preprocessor?

Path	csiph.com!x330-a1.tempe.blueboxinc.net!usenet.pasdenom.info!weretis.net!feeder4.news.weretis.net!news.musoftware.de!wum.musoftware.de!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail
From	Ian Collins <ian-news@hotmail.com>
Newsgroups	comp.lang.c++
Subject	Re: The or operator and the preprocessor?
Date	Mon, 13 Feb 2012 15:59:15 +1300
Lines	21
Message-ID	<9prck4F2i6U1@mid.individual.net> (permalink)
References	<jh9ra0$2h3$1@speranza.aioe.org>
Mime-Version	1.0
Content-Type	text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding	7bit
X-Trace	individual.net Inzuu6vNFHyefUNnmYOkuQokyPJ9Ugy20A+tzL8N8Hy6DizuXR
Cancel-Lock	sha1:bk2zGiiB2djxQQ9Luux10rlNUgg=
User-Agent	Mozilla/5.0 (X11; SunOS i86pc; rv:6.0.2) Gecko/20111003 Thunderbird/6.0.2
In-Reply-To	<jh9ra0$2h3$1@speranza.aioe.org>
Xref	x330-a1.tempe.blueboxinc.net comp.lang.c++:13958

Show key headers only | View raw

On 02/13/12 03:08 PM, glen herrmannsfeldt wrote:
> error: "or" cannot be used as a macro name as it is an operator in C++
>
> In C, the preprocessor does what its name says, and occurs before
> the compiler sees tokens and reserved words.
>
> Is that not true in C++?
>
> extern "C" {
> #include<stdio.h>
> #define or "hi there!\n"
>     int main() {
>        printf( or );
>     }
> }

The error is valid, "or" is the alternative token for "||" in C++. 
Redefining it is a bad idea.

-- 
Ian Collins

Thread

The or operator and the preprocessor? glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2012-02-13 02:08 +0000
  Re: The or operator and the preprocessor? Ian Collins <ian-news@hotmail.com> - 2012-02-13 15:59 +1300
    Re: The or operator and the preprocessor? glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2012-02-13 05:32 +0000
      Re: The or operator and the preprocessor? Ian Collins <ian-news@hotmail.com> - 2012-02-13 20:27 +1300

csiph-web