Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!cs.utexas.edu!uunet!mcvax!ukc!axion!skilbane
From: skilbane@zaphod.axion.bt.co.uk (Steven Kilbane)
Newsgroups: comp.lang.c
Subject: Re: comma operator
Message-ID: <2117@zaphod.axion.bt.co.uk>
Date: 2 Aug 89 07:33:40 GMT
References: <918@helios.toronto.edu>
Sender: news@axion.bt.co.uk
Reply-To: skilbane@zaphod.axion.bt.co.uk
Lines: 31

From article <918@helios.toronto.edu>, by dooley@helios.toronto.edu (Kevin Dooley):
> Can anybody tell me if there is a usage where the comma is 'better'.
> By this I mean are there any places where using a comma makes the 
> code more readable, efficient, produce cleaner/faster assembler (I
> know this is compiler dependant).  It's just that I've never seen a
> program with the comma operator where I didn't scream and edit it out.
> Am I being hopelessly pedestrian here?

Well, in addition to the points about macro use, my own _personal_ feeling is
that it can highlight associations:

1	x=5;
	for (c='k';...;..) {

2	for (x=5,c='k';...;..) {

Now, to me, the first form indicates that c will be used in the loop, and that
x might be. The second strongly hints that both c and x will be used in the
loop.

I dunno - maybe I'm just sick.
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Stephen Kilbane                      |Email: skilbane@uk.co.bt.axion
British Telecom Research Laboratories|or smk-a@uk.ac.york.minster (or, if that
Martlesham Heath                     |doesn't work, root@uk.ac.york.softeng - 
Ipswich IP5 7RE (0473 646638)        |not me, but it may be passed on....
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