From: Stefan Monnier <monnier@iro.umontreal.ca>
To: Glenn Morris <rgm@gnu.org>
Cc: emacs-devel@gnu.org
Subject: Re: [Emacs-diffs] /srv/bzr/emacs/emacs-24 r110798: Small doc updates for generalized variables
Date: Wed, 07 Nov 2012 08:58:36 -0500 [thread overview]
Message-ID: <jwv4nl1plj0.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <E1TVy11-0001nh-HQ@vcs.savannah.gnu.org> (Glenn Morris's message of "Tue, 06 Nov 2012 20:37:07 -0800")
> -instead the assignment is turned into (prog1 VAL (SETTER ARGS... VAL))
> +instead the assignment is turned into something equivalent to
> + \(let ((temp VAL))
> + (SETTER ARGS... temp)
> + temp)
Neither of the two forms is precisely correct (because both forms
evaluate VAL before ARGS).
The intent is not to be precise but to explain the kind of behavior
sought. So the `prog1' form works just as well.
Stefan
parent reply other threads:[~2012-11-07 13:58 UTC|newest]
Thread overview: expand[flat|nested] mbox.gz Atom feed
[parent not found: <E1TVy11-0001nh-HQ@vcs.savannah.gnu.org>]
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