From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham
	autolearn_force=no version=3.4.4
X-Google-Language: ENGLISH,ASCII-7-bit
X-Google-Thread: 103376,38fc011071df5a27
X-Google-Attributes: gid103376,public
X-Google-ArrivalTime: 2003-06-07 17:48:52 PST
Path: 
 archiver1.google.com!news1.google.com!newsfeed.stanford.edu!headwall.stanford.edu!newshub.sdsu.edu!elnk-nf2-pas!newsfeed.earthlink.net!wn14feed!wn13feed!wn12feed!worldnet.att.net!204.127.198.203!attbi_feed3!attbi.com!rwcrnsc53.POSTED!not-for-mail
From: tmoran@acm.org
Newsgroups: comp.lang.ada
Subject: Re: Ideas for Ada 200X
References: <LbuEa.1168921$S_4.1191777@rwcrnsc53>
X-Newsreader: Tom's custom newsreader
Message-ID: <rJvEa.1169864$S_4.1193196@rwcrnsc53>
NNTP-Posting-Host: 12.234.13.56
X-Complaints-To: abuse@attbi.com
X-Trace: rwcrnsc53 1055033303 12.234.13.56 (Sun, 08 Jun 2003 00:48:23 GMT)
NNTP-Posting-Date: Sun, 08 Jun 2003 00:48:23 GMT
Organization: AT&T Broadband
Date: Sun, 08 Jun 2003 00:48:23 GMT
Xref: archiver1.google.com comp.lang.ada:38796
Date: 2003-06-08T00:48:23+00:00
List-Id: <comp.lang.ada>

Let's make a small change: A and B are rotations, represented
as matrices.  Then
  A := A+B;
sets A to the result of rotation A followed by rotation B.  If "A+=B"
was a legitimate alternative syntax for "Add(A,Increment=>B)",
then it would in fact be implemented as a matrix multiplication,
complete with intermediate temporary storage.  Interpreting it
as an element-by-element floating point addition would be quite wrong.