Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!uupsi!cmcl2!adm!smoke!gwyn
From: gwyn@smoke.brl.mil (Doug Gwyn)
Newsgroups: comp.lang.c
Subject: Re: The nonexistent operator (along = v. == lines)
Message-ID: <15704@smoke.brl.mil>
Date: 4 Apr 91 17:52:41 GMT
References: <156@revcan.UUCP> <157@revcan.UUCP> <1991Apr3.203748.3226@neon.Stanford.EDU>
Organization: U.S. Army Ballistic Research Laboratory, APG, MD.
Lines: 7

In article <1991Apr3.203748.3226@neon.Stanford.EDU> dkeisen@Gang-of-Four.Stanford.EDU (Dave Eisen) writes:
>#define XOR(a,b)	(!!(a) ^ !!(b))

or even
#define XOR(a,b) (!(a)^!(b))
which is, I think, the shortest fully correct solution to this
rather peculiar "requirement".