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: Closures in Emacs and their usage scenarios. Date: Wed, 29 Sep 2021 08:43:05 +0200 Message-ID: <87k0izq3uu.fsf@zoho.eu> References: <87bl4do1ln.fsf@zoho.eu> Reply-To: Emanuel Berg 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="34174"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) To: help-gnu-emacs@gnu.org Cancel-Lock: sha1:FNJ7HuIWAgclMMRKCMhP0ii8QP8= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Wed Sep 29 08:44:07 2021 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 1mVTK3-0008e6-Dn for geh-help-gnu-emacs@m.gmane-mx.org; Wed, 29 Sep 2021 08:44:07 +0200 Original-Received: from localhost ([::1]:56000 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mVTK1-0002Dj-DT for geh-help-gnu-emacs@m.gmane-mx.org; Wed, 29 Sep 2021 02:44:05 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:37726) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mVTJE-00025f-Ly for help-gnu-emacs@gnu.org; Wed, 29 Sep 2021 02:43:16 -0400 Original-Received: from ciao.gmane.io ([116.202.254.214]:33482) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mVTJC-0000pI-RV for help-gnu-emacs@gnu.org; Wed, 29 Sep 2021 02:43:16 -0400 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1mVTJB-0007ey-As for help-gnu-emacs@gnu.org; Wed, 29 Sep 2021 08:43:13 +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-Spam_score_int: -16 X-Spam_score: -1.7 X-Spam_bar: - X-Spam_report: (-1.7 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.249, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no 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:133379 Archived-At: > Here is one example - note that the byte-compiler will warn > that "the function ‘align-from-left’ is not known to be > defined." Well, OK. I think you can shut the byte-compiler up by using `declare-function', see the source. Is this the rare case of a mutable variable BTW? Interesting if so, since it is the only use case I can think of, maybe except for several functions sharing the same data (OK, let's say that data won't change). ;;; -*- lexical-binding: t -*- ;;; ;;; this file: ;;; https://dataswamp.org/~incal/emacs-init/align-from-left.el (require 'cl-lib) (let ((alf-regexp)) (defun align-from-left (&optional set-regexp) (interactive "p") (let ((default-regexp "^\\|[[:punct:]]\\|[[:space:]][[:alnum:]]")) (unless (stringp set-regexp) (cl-case set-regexp ( 4 (setq alf-regexp (read-regexp "regexp: "))) (16 (setq alf-regexp default-regexp)) ( t (unless alf-regexp (setq alf-regexp default-regexp) ))))) (let ((beg (point)) (re (or (and (stringp set-regexp) set-regexp) alf-regexp) )) (when (re-search-backward re (line-beginning-position) t) (while (looking-at "[[:space:]]") (forward-char 1) ) (insert (make-string (- beg (point)) ?\s)) )))) (declare-function align-from-left nil) (defalias 'alf #'align-from-left) (provide 'align-from-left) -- underground experts united https://dataswamp.org/~incal