From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Alan Mackenzie Newsgroups: gmane.emacs.devel Subject: Unhelpful text in C-h v search-default-mode Date: Tue, 24 Oct 2023 09:45:59 +0000 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="1824"; mail-complaints-to="usenet@ciao.gmane.io" To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Tue Oct 24 11:46:54 2023 Return-path: Envelope-to: ged-emacs-devel@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 1qvDzx-0000N6-QV for ged-emacs-devel@m.gmane-mx.org; Tue, 24 Oct 2023 11:46:53 +0200 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qvDzN-0003PX-C9; Tue, 24 Oct 2023 05:46:18 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qvDzJ-0003Nz-31 for emacs-devel@gnu.org; Tue, 24 Oct 2023 05:46:13 -0400 Original-Received: from mail.muc.de ([193.149.48.3]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qvDzA-0001oq-I6 for emacs-devel@gnu.org; Tue, 24 Oct 2023 05:46:12 -0400 Original-Received: (qmail 44361 invoked by uid 3782); 24 Oct 2023 11:46:01 +0200 Original-Received: from acm.muc.de (pd953a266.dip0.t-ipconnect.de [217.83.162.102]) (using STARTTLS) by colin.muc.de (tmda-ofmipd) with ESMTP; Tue, 24 Oct 2023 11:46:00 +0200 Original-Received: (qmail 3986 invoked by uid 1000); 24 Oct 2023 09:45:59 -0000 Content-Disposition: inline X-Submission-Agent: TMDA/1.3.x (Ph3nix) X-Primary-Address: acm@muc.de Received-SPF: pass client-ip=193.149.48.3; envelope-from=acm@muc.de; helo=mail.muc.de 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_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.29 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-mx.org@gnu.org Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.devel:311765 Archived-At: Hello, Emacs. In a recent master branch Emacs, (not with -Q), from an info buffer, I did C-h v search-default-mode. The text printed in *Help* included this: Its value is # Original value was nil Local in buffer *info*<3>; global value is nil .. This is quite frankly entirely unhelpful; it gives no way to find out what the lambda is, in particular, no way to get to its source code. It isn't even possible to disassemble the function. After a good deal of searching, I think I found the pertinent source code, but am not sure, namely in isearch.el L4685, right near the end: (setq-local isearch-fold-quotes-mode--state (buffer-local-set-state search-default-mode (lambda (string &optional _lax) (thread-last (regexp-quote string) (replace-regexp-in-string "`" "[`‘]") (replace-regexp-in-string "'" "['’]") (replace-regexp-in-string "\"" "[\"""]"))))) .. Here, this customisable variable search-default-mode gets set to a lambda function. The problem could have been avoided if the extra effort to come up with a symbol for this function had been expended, and the function written separately as a defun with a name. I am asking people to be careful not to use lambda forms like this, instead always prefering defun and a name. -- Alan Mackenzie (Nuremberg, Germany).