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Date: Mon, 30 Dec 2002 20:54:00 -0000
From: Neil Booth <neil@daikokuya.co.uk>
To: Stephen Lindholm <lindholm@CS.Stanford.EDU>
Cc: gcc@gcc.gnu.org
Subject: Re: Change in preprocessor behavior
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Stephen Lindholm wrote:-

> thrush:~% cpp test2
> # 1 "test2"
> 
>       
> struct command commands[] =
> {
>   { #quit, quit ## _command },
>   { #help, help ## _command },
> };

Contrary to your claim, I suspect you're using cpp -traditional, no?

Traditional preprocessors did not support # and ##, and 3.1 is more
"correct" in this respect.  FWIW 3.3 has another new implementation of
traditional preprocessing which is the most faithful of GCC's
implementations to true traditional preprocessing.

Neil.