From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Steinar Bang Newsgroups: gmane.emacs.help Subject: Re: How do I pass a variable defined in a wrapping let, to a lambda? Date: Sat, 12 Mar 2022 09:51:59 +0100 Message-ID: References: <871qz85bwh.fsf@ericabrahamsen.net> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="4538"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.2 (windows-nt) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Sat Mar 12 09:52:40 2022 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 1nSxUO-000100-BG for geh-help-gnu-emacs@m.gmane-mx.org; Sat, 12 Mar 2022 09:52:40 +0100 Original-Received: from localhost ([::1]:44568 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nSxUM-0000AY-MH for geh-help-gnu-emacs@m.gmane-mx.org; Sat, 12 Mar 2022 03:52:38 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:48204) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nSxTp-0000A9-HQ for help-gnu-emacs@gnu.org; Sat, 12 Mar 2022 03:52:05 -0500 Original-Received: from cadalora.default.sbang.bv.iomart.io ([46.43.15.90]:59298) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nSxTn-0006Tc-Hg for help-gnu-emacs@gnu.org; Sat, 12 Mar 2022 03:52:05 -0500 Original-Received: from AAP-5CG8284ZXT (unknown [84.210.87.211]) by cadalora.default.sbang.bv.iomart.io (Postfix) with ESMTPSA id B66681053B2 for ; Sat, 12 Mar 2022 08:52:00 +0000 (GMT) In-Reply-To: <871qz85bwh.fsf@ericabrahamsen.net> (Eric Abrahamsen's message of "Fri, 11 Mar 2022 15:04:30 -0800") Received-SPF: none client-ip=46.43.15.90; envelope-from=sb@dod.no; helo=cadalora.default.sbang.bv.iomart.io X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_NONE=0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.29 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:136481 Archived-At: >>>>> Eric Abrahamsen : > Steinar Bang writes: [snip!] >> If I replace the filename variable with a text constant[6], then the >> function works. >> But as far as I can tell, the function in[4] uses variables defined in >> the wrapping (let) in the lambda...? >> So why is that working but my filename failing? > They've got a lexical-binding cookie at the top of the file, but you don't! :) Wait..? What...? Huh...? This thing: -*- lexical-binding: t; -*- ? Now *that* wasn't obscure at all...! :-) But then this may be fixable after all. I was going a bit crazy here trying to figure out what was the difference between my code and the code that worked. (And I see from this thread that I'm not alone in being confused) So thanks to all that contributed! Too many to respond to each individually! :-)