Path: utzoo!mnetor!uunet!husc6!hao!boulder!tramp!swarbric
From: swarbric@tramp.Colorado.EDU (SWARBRICK FRANCIS JOHN)
Newsgroups: comp.lang.c
Subject: Re: comma operator
Message-ID: <3887@sigi.Colorado.EDU>
Date: 19 Jan 88 00:04:33 GMT
References: <3819@sigi.Colorado.EDU> <5080013@hpfcdc.HP.COM> <7120@brl-smoke.ARPA>
Sender: news@sigi.Colorado.EDU
Reply-To: swarbric@tramp.Colorado.EDU (SWARBRICK FRANCIS JOHN)
Organization: University of Colorado, Boulder
Lines: 15

In article <7120@brl-smoke.ARPA> gwyn@brl.arpa (Doug Gwyn (VLD/VMB) <gwyn>) writes:
>By the way, I don't think there IS a good way to write a generic swap
>macro.  Didn't we go over this about a year ago?

#define swap(a,b) ((a) = ((b) = ((a) = (a) ^ (b)) ^ (b)) ^ (a))

Try that, and tell me what you think.  A super-genius friend of mine figured
it out.  He says it will work for anything (int, char *, etc.).  But it
sure boggles my mind...

------------------------------------------------------------------
Frank Swarbrick                   |  "Ignorance and prejudice --
swarbric@tramp.UUCP               |   And fear walk and in hand."
swarbric@tramp.Colorado.EDU       |                         --RUSH
...!{hao|nbires}!boulder!tramp!swarbric