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000016_icon-group-sender_Thu Feb 13 12:48:39 2003.msg
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Received: (from root@localhost)
by baskerville.CS.Arizona.EDU (8.11.1/8.11.1) id h1DJk4k07502
for icon-group-addresses; Thu, 13 Feb 2003 12:46:04 -0700 (MST)
Message-Id: <200302131946.h1DJk4k07502@baskerville.CS.Arizona.EDU>
From: ernobe <ernobe@yahoo.com>
X-Newsgroups: comp.lang.icon
Subject: Re: data values
Date: Thu, 13 Feb 2003 09:54:48 -0600
User-Agent: Noworyta News Reader/2.9
To: icon-group@cs.arizona.edu
Errors-To: icon-group-errors@cs.arizona.edu
Status: RO
> The whole section immediately following, entitled "Data Backtracking"
> might as well be paraphrased as "There is such a thing as data
> backtracking". Would it be right to conclude from it that the success
> of expressions in a logical conjunction does not depend on the success
> of the final expression, while the success of the conjunction as a whole
> does?
>From p.30, "Arguments are not dereferenced until all of them have been
evaluated." Does that mean that if an argument fails no dereferencing in
any of the arguments succeeds? In that case the section entitled "Data
Backtracking" could benefit with a line like "If an argument in a
logical conjunction fails, no operations requiring dereferencing
succeed."