From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel 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 Message-ID: References: NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1352296726 3691 80.91.229.3 (7 Nov 2012 13:58:46 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 7 Nov 2012 13:58:46 +0000 (UTC) Cc: emacs-devel@gnu.org To: Glenn Morris Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Wed Nov 07 14:58:55 2012 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1TW69d-0006oc-LC for ged-emacs-devel@m.gmane.org; Wed, 07 Nov 2012 14:58:53 +0100 Original-Received: from localhost ([::1]:32983 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TW69U-0002U2-Mq for ged-emacs-devel@m.gmane.org; Wed, 07 Nov 2012 08:58:44 -0500 Original-Received: from eggs.gnu.org ([208.118.235.92]:56738) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TW69S-0002Tf-8p for emacs-devel@gnu.org; Wed, 07 Nov 2012 08:58:43 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TW69O-0001M5-9i for emacs-devel@gnu.org; Wed, 07 Nov 2012 08:58:42 -0500 Original-Received: from ironport2-out.teksavvy.com ([206.248.154.182]:64937) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TW69O-0001Lz-2T; Wed, 07 Nov 2012 08:58:38 -0500 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: Av0EAG6Zu0/O+LEi/2dsb2JhbABEtBGBCIIWAQVWIxALDiYSFBgNJIghugmQRAOIQppxgViDBw X-IronPort-AV: E=Sophos;i="4.75,637,1330923600"; d="scan'208";a="206657661" Original-Received: from 206-248-177-34.dsl.teksavvy.com (HELO pastel.home) ([206.248.177.34]) by ironport2-out.teksavvy.com with ESMTP/TLS/ADH-AES256-SHA; 07 Nov 2012 08:58:36 -0500 Original-Received: by pastel.home (Postfix, from userid 20848) id 299C05977F; Wed, 7 Nov 2012 08:58:36 -0500 (EST) In-Reply-To: (Glenn Morris's message of "Tue, 06 Nov 2012 20:37:07 -0800") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (gnu/linux) X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 206.248.154.182 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:154712 Archived-At: > -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