From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Emanuel Berg via Users list for the GNU Emacs text editor Newsgroups: gmane.emacs.help Subject: Re: wrong type error in local variables Date: Fri, 03 Jul 2020 04:00:52 +0200 Message-ID: <87zh8hnyqz.fsf@ebih.ebihd> References: <8270ebe2-8e9d-2bf9-fa1c-b6e968aabe5a@gmail.com> <878sg1ri0f.fsf@ebih.ebihd> <877dvlpf83.fsf@ebih.ebihd> <7fa40d4a-f713-9771-a7ed-8cb83e24bf59@gmail.com> Reply-To: Emanuel Berg Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="4006"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1 (gnu/linux) To: help-gnu-emacs@gnu.org Cancel-Lock: sha1:dj3wTp+Z7ijkmgE7N6xZt6ly1wk= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Fri Jul 03 04:01:23 2020 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1jrB10-0000yg-RX for geh-help-gnu-emacs@m.gmane-mx.org; Fri, 03 Jul 2020 04:01:22 +0200 Original-Received: from localhost ([::1]:60900 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jrB0z-0004z2-TH for geh-help-gnu-emacs@m.gmane-mx.org; Thu, 02 Jul 2020 22:01:21 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:56834) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jrB0h-0004yi-JE for help-gnu-emacs@gnu.org; Thu, 02 Jul 2020 22:01:03 -0400 Original-Received: from static.214.254.202.116.clients.your-server.de ([116.202.254.214]:60800 helo=ciao.gmane.io) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jrB0e-00061U-T9 for help-gnu-emacs@gnu.org; Thu, 02 Jul 2020 22:01:03 -0400 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1jrB0c-0000Wf-1e for help-gnu-emacs@gnu.org; Fri, 03 Jul 2020 04:00:58 +0200 X-Injected-Via-Gmane: http://gmane.org/ Mail-Followup-To: help-gnu-emacs@gnu.org Mail-Copies-To: never Received-SPF: pass client-ip=116.202.254.214; envelope-from=geh-help-gnu-emacs@m.gmane-mx.org; helo=ciao.gmane.io X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/02 21:19:46 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -8 X-Spam_score: -0.9 X-Spam_bar: / X-Spam_report: (-0.9 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.23 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-mx.org@gnu.org Original-Sender: "help-gnu-emacs" Xref: news.gmane.io gmane.emacs.help:123482 Archived-At: Douglas Lewan wrote: >> Okay, but what exactly is the problem with it, >> from Lisp? > > The problem is that it changes the buffer. > > If a (find-file) fails and you were depending on > the change of the current buffer all kinds of other > things might go wrong. > > If you use (find-file-noselect), then the current > buffer doesn't change and any attempt to use that > buffer would fail. In particular, you should be > verifying that the (find-file-noselect) succeeded. Gotcha, but then why not just have a single such function that does the checking itself and aborts further execution immediately after the initial, failed attempt to find the file? Then 1 (onee) function would be used, and with no need to explicitely check if it succeeded? -- underground experts united http://user.it.uu.se/~embe8573 https://dataswamp.org/~incal