From:	Jack Klein <jackklein AT spamcop DOT net>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Names allowed in macros
Message-ID:	<3dvsktck2fpqdk4i4n83t187tit829bl1m@4ax.com>
References:	<9ilcop$pdt$2 AT info DOT cyf-kr DOT edu DOT pl>
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Date:	Fri, 13 Jul 2001 04:51:12 GMT
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On Fri, 13 Jul 2001 00:32:07 +0200, "Rafal Maj (Raf256)"
<raf256 AT go2 DOT pl> wrote in comp.os.msdos.djgpp:

> Hi,
> please don't be angry that I'm sending so meany post, but I'm serious
> working on UPT...
> 
> I't looks like DJGPP don't allow to use @ character in macros... is it a bug
> ?
> 
> --- file @beta.h ---
> #ifndef include_ AT beta_H
> #define include_ AT beta_H included
> 
> --- report ---
> @beta.h(2) Warning:  garbage at end of `#ifndef' argument
> @beta.h(3) Warning:  missing white space after `#define include_'

Both the C and C++ language standards have identical specifications
for all symbol names, whether they are macros or not.  The ASCII '@'
character is not in the required character set so a compiler is not
required to accept it in a symbol name.

There are a few compilers that do, but the vast majority of compilers
do not, so if you do this on a compiler that accepts it you are asking
for problems if you ever need to port the code.

-- 
Jack Klein
Home: http://JK-Technology.Com
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