Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!uflorida!haven!adm!smoke!gwyn
From: gwyn@smoke.BRL.MIL (Doug Gwyn)
Newsgroups: comp.lang.c
Subject: Re: comma operator
Message-ID: <10641@smoke.BRL.MIL>
Date: 1 Aug 89 14:55:08 GMT
References: <10099@mpx2.mpx.com> <93@microsoft.UUCP> <10100@mpx2.mpx.com> <10562@smoke.BRL.MIL> <1989Jul24.194646.3012@nc386.uucp> <5630@pt.cs.cmu.edu> <1989Jul28.174033.12734@jarvis.csri.toronto.edu> <918@helios.toronto.edu>
Reply-To: gwyn@brl.arpa (Doug Gwyn)
Organization: Ballistic Research Lab (BRL), APG, MD.
Lines: 6

In article <918@helios.toronto.edu> dooley@helios.physics.utoronto.ca (Kevin Dooley) writes:
>Can anybody tell me if there is a usage where the comma is 'better'.

The comma operator's main legitimate use is in the definition of macros
that are expected to act like function calls but perform actions too
complex for a single (non-comma) expression.