Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!utgpu!water!watmath!clyde!cbatt!cwruecmp!hal!ncoast!allbery
From: allbery@ncoast.UUCP
Newsgroups: news.software.b,comp.lang.c
Subject: Re: News for Xenix on PC AT ?
Message-ID: <2433@ncoast.UUCP>
Date: Tue, 28-Apr-87 22:14:13 EDT
Article-I.D.: ncoast.2433
Posted: Tue Apr 28 22:14:13 1987
Date-Received: Fri, 1-May-87 07:06:15 EDT
References: <18346@ucbvax.BERKELEY.EDU> <145@sds.UUCP> <17005@sun.uucp> <146@sds.UUCP> <5787@brl-smoke.ARPA>
Reply-To: allbery@ncoast.UUCP (Brandon Allbery)
Followup-To: news.software.b
Organization: Cleveland Public Access UN*X, Cleveland, Oh
Lines: 30
Xref: utgpu news.software.b:551 comp.lang.c:1913

As quoted from <5787@brl-smoke.ARPA> by gwyn@brl-smoke.ARPA (Doug Gwyn ):
+---------------
| I will agree that writing
| 	if ( !pointer )
| is bad style, but it is nonetheless technically correct.  If your compiler
| can't handle this, then it is broken; perhaps you should try to get it fixed.
+---------------

HAH!!!

The System V.2 pcc is the first version that gets this correct consistently;
in fact, it's the first version that gets "if (!x)" for any x which may not
necessarily be constrained to values in the set {0, 1} correct.  (You would
not believe the problems I've had bringing up phantasia under Xenix 2.3 and
3.0 for Tandy 6000 and under System III for Plexus, due to this.)  As a
result, whether it's ``technically correct'' or not I refuse to use that
feature in my own programs, in the interests of allowing people using old pcc's
to compile my programs.

I don't know what the heck pcc was doing before (or what it's doing now; I
wouldn't trust it as far as I could throw it) but we aren't the only ones
that use it.  I just pray daily for Plexus to release V.3 with the Green
Hills compiler.

++Brando
-- 
Brandon S. Allbery	{decvax,cbatt,cbosgd}!cwruecmp!ncoast!allbery
Tridelta Industries	{ames,mit-eddie,talcott}!necntc!ncoast!allbery
7350 Corporate Blvd.	necntc!ncoast!allbery@harvard.HARVARD.EDU
Mentor, OH 44060	+01 216 255 1080