From: Florian Weimer <fw@deneb.enyo.de>
Subject: Re: Does a null pointer always raise Constraint_Error?
Date: 13 Dec 2000 21:07:01 +0100
Date: 2000-12-13T21:07:01+01:00 [thread overview]
Message-ID: <87zoi0w0ey.fsf@deneb.enyo.de> (raw)
In-Reply-To: 9185a6$mut$1@nnrp1.deja.com
Robert Dewar <robert_dewar@my-deja.com> writes:
> > There a two language-defined checks involved prior
> > to the array comparison. However, 11.6(5) seems to
> > permit the omission of these checks, but I'm not
> > sure about that.
>
> Nobody is sure about 11.6 :-)
:-)
> I don't think it applies however. Why not? Because
> the program does indeed depend on the result of this
> comparison. If you did
>
> Junk := a.all = b.all;
>
> and never referenced junk, then you could use
> 11.6(5) to argue that the check should be omitted.
That's one of the simple cases everybody seems to be happy with.
I would argue that a.all and b.all are undefined, but because of their
type, their values can be compared with a well-defined result anyway.
next prev parent reply other threads:[~2000-12-13 20:07 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <Pine.LNX.4.10.10011301306120.793-100000@lexis.di.fct.unl.pt>
[not found] ` <tgzoihpon4.fsf@mercury.rus.uni-stuttgart.de>
[not found] ` <9074fi$93b$1@nnrp1.deja.com>
[not found] ` <3A3253B1.AD8F32CF@ebox.tninet.se>
[not found] ` <90u1vi$uah$1@nnrp1.deja.com>
[not found] ` <90ukfm$c4p$1@nnrp1.deja.com>
2000-12-12 16:23 ` Does a null pointer always raise Constraint_Error? Wayne Magor
2000-12-12 20:27 ` Keith Thompson
2000-12-13 0:46 ` Robert Dewar
2000-12-13 8:58 ` Lutz Donnerhacke
2000-12-13 13:56 ` Ken Garlington
2000-12-13 14:25 ` Lutz Donnerhacke
2000-12-13 14:58 ` Florian Weimer
2000-12-13 15:17 ` Lutz Donnerhacke
2000-12-13 15:40 ` Robert Dewar
2000-12-13 20:07 ` Florian Weimer [this message]
2000-12-14 13:08 ` Robert Dewar
2000-12-14 14:29 ` Ken Garlington
2000-12-15 1:45 ` Robert Dewar
2000-12-13 15:37 ` Robert Dewar
2000-12-12 20:31 ` Keith Thompson
2000-12-13 19:58 ` Florian Weimer
2000-12-13 0:43 ` Robert Dewar
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