Re: preprocessor/2219

[Neil Booth <neil@daikokuya.demon.co.uk>]

The following reply was made to PR preprocessor/2219; it has been noted by GNATS.

From: Neil Booth <neil@daikokuya.demon.co.uk>
To: Jeremy Elson <jelson@circlemud.org>
Cc: gcc-gnats@gcc.gnu.org, nobody@gcc.gnu.org
Subject: Re: preprocessor/2219
Date: Thu, 8 Mar 2001 18:49:26 +0000

 Jeremy Elson wrote:-
 
 > Sure - here it is.  Compiles fine under 2.95 and gives a warning under
 > 2.97:
 > 
 > 
 >  #define RDEBUG(message_level, args...) do { \
 >    if (debug_level >= message_level) rdebug_real(##args); \
 > } while(0)
 > 
 > int debug_level;
 > 
 > static void rdebug_real(char *fmt, ...)
 > {
 >   /* in the real code, this prints a debug message */
 > }
 > 
 > int main()
 > {
 >   RDEBUG(0, "my debug message: %s", "my argument");
 > }
 
 Like I said, the ## serves no purpose (apart from maybe preventing macro
 expansion - this use of it here is no longer supported).  Just remove it.
 
 Neil.