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-Thread: 103376,2cb1f0b6d642e1dc
X-Google-NewGroupId: yes
X-Google-Attributes: gida07f3367d7,domainid0,public,usenet
X-Google-Language: ENGLISH,ASCII-7-bit
Path: 
 g2news2.google.com!news4.google.com!news1.google.com!newsfeed2.dallas1.level3.net!news.level3.com!bloom-beacon.mit.edu!newsswitch.lcs.mit.edu!nntp.TheWorld.com!not-for-mail
From: Robert A Duff <bobduff@shell01.TheWorld.com>
Newsgroups: comp.lang.ada
Subject: Re: Pascal Calling Convention
Date: Sun, 27 Mar 2011 12:18:20 -0400
Organization: The World Public Access UNIX, Brookline, MA
Message-ID: <wccipv4h703.fsf@shell01.TheWorld.com>
References: <9b04626e-567d-408c-aab3-39b964b3ffd6@l2g2000prg.googlegroups.com>
 <op.vstkpc1rule2fv@index.ici> <ime30d$rrk$1@munin.nbi.dk>
 <op.vstobjtxule2fv@index.ici>
 <F8mdnYCca6tRJBfQnZ2dnUVZ_s-dnZ2d@earthlink.com>
 <lnipv89vg7.fsf@nuthaus.mib.org> <87y641vabt.fsf@mid.deneb.enyo.de>
NNTP-Posting-Host: shell01.theworld.com
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
X-Trace: pcls6.std.com 1301242700 4630 192.74.137.71 (27 Mar 2011 16:18:20
 GMT)
X-Complaints-To: abuse@TheWorld.com
NNTP-Posting-Date: Sun, 27 Mar 2011 16:18:20 +0000 (UTC)
User-Agent: Gnus/5.1008 (Gnus v5.10.8) Emacs/21.3 (irix)
Cancel-Lock: sha1:1ujCuLwc9NvBrbdX1fS1Fba1KfU=
Xref: g2news2.google.com comp.lang.ada:19468
Date: 2011-03-27T12:18:20-04:00
List-Id: <comp.lang.ada>

Florian Weimer <fw@deneb.enyo.de> writes:

> But there is undefined behavior because the standard says so, and
> undefined behavior because it's not specified at all (perhaps
> accidentally).  "Erroneous execution" doesn't suffer from this
> problem.

I don't see the difference.  How do you know I didn't leave out
something important when I wrote some part of the Ada RM?
Of course, I tried not to, and I'm sure people writing the C
standard did, too.

Of course, there are always things outside the standard.  Neither C
nor Ada standard will tell you what happens if you run your program
under a debugger, and modify a constant while stopped at a breakpoint.
Or stop a program that is in the middle of doing "delay X;".
Or what happens if you unplug the computer while running a C or Ada
program.

- Bob