Path: utzoo!dciem!nrcaer!sce!cognos!jimp
From: jimp@cognos.UUCP (Jim Patterson)
Newsgroups: comp.std.c
Subject: Re: ANSI assert
Keywords: assert, NDEBUG
Message-ID: <8795@cognos.UUCP>
Date: 13 Sep 90 18:58:19 GMT
References: <1428@proto.COM> <1990Sep8.164857.2930@jarvis.csri.toronto.edu>
Reply-To: jimp@cognos.UUCP (Jim Patterson)
Organization: Cognos Inc., Ottawa, Canada
Lines: 23

In article <1990Sep8.164857.2930@jarvis.csri.toronto.edu> norvell@csri.toronto.edu (Theo Norvell) writes:
>As has been pointed out, you may write your own assert macro.  May I
>suggest
>
>#define assert_and_do(x) ((x) || assert(0))

There's a slight problem with this. While it will work, it will print
a rather misleading message with many ANSI implementations of assert (which
print out the failing condition). For example, you might see:

		Failed assertion (0) at line 117 of myfile.c

when what you want to see is:

		Failed assertion (x_init - x*x < EPS) at line 117 of myfile.c

It would be better, though more work and potentially less portable, to copy 
and modify the definition of assert().
-- 
Jim Patterson                              Cognos Incorporated
UUCP:uunet!mitel!sce!cognos!jimp           P.O. BOX 9707    
PHONE:(613)738-1440                        3755 Riverside Drive
                                           Ottawa, Ont  K1G 3Z4