From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.help Subject: Re: Any disadvantages of using put/get instead of defvar? Date: Thu, 20 Feb 2014 20:40:08 -0500 Message-ID: References: <87ob218lsu.fsf@thinkpad-t61.fritz.box> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1392946842 662 80.91.229.3 (21 Feb 2014 01:40:42 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 21 Feb 2014 01:40:42 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Fri Feb 21 02:40:50 2014 Return-path: Envelope-to: geh-help-gnu-emacs@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 1WGf6e-0005Bu-GA for geh-help-gnu-emacs@m.gmane.org; Fri, 21 Feb 2014 02:40:48 +0100 Original-Received: from localhost ([::1]:41585 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WGf6e-0001Ci-5U for geh-help-gnu-emacs@m.gmane.org; Thu, 20 Feb 2014 20:40:48 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:32864) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WGf6L-00017A-5E for help-gnu-emacs@gnu.org; Thu, 20 Feb 2014 20:40:36 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1WGf6C-0003oG-WF for help-gnu-emacs@gnu.org; Thu, 20 Feb 2014 20:40:29 -0500 Original-Received: from plane.gmane.org ([80.91.229.3]:43612) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WGf6C-0003nr-Pf for help-gnu-emacs@gnu.org; Thu, 20 Feb 2014 20:40:20 -0500 Original-Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1WGf6A-0004VW-VF for help-gnu-emacs@gnu.org; Fri, 21 Feb 2014 02:40:18 +0100 Original-Received: from 75-119-250-56.dsl.teksavvy.com ([75.119.250.56]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Fri, 21 Feb 2014 02:40:18 +0100 Original-Received: from monnier by 75-119-250-56.dsl.teksavvy.com with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Fri, 21 Feb 2014 02:40:18 +0100 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 19 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: 75-119-250-56.dsl.teksavvy.com User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (gnu/linux) Cancel-Lock: sha1:L1aDvoiQ8gvvq5GOoqcaxNnbovQ= X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 80.91.229.3 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:96146 Archived-At: > You could also define the variable inside the function, i.e., that's a > buffer-local counter: > (defun counter () > (defvar counter-var 1) > (setq-local counter-var (1+ counter-var))) I'd recommend against it. Its semantics is pretty much the same as (defun counter () (defvar counter-var 1) (setq-local counter-var (1+ counter-var))) except that `counter-var' will only be defined after the first call to `counter'. And no, it's not buffer-local. Stefan