From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Emanuel Berg Newsgroups: gmane.emacs.help Subject: Re: Effect of lexical binding upon function paramaters Date: Sun, 06 Nov 2022 21:44:36 +0100 Message-ID: <87edufbyob.fsf@dataswamp.org> References: <87k04ci43r.fsf@dataswamp.org> <87o7tlfmcm.fsf@dataswamp.org> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="10673"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) To: help-gnu-emacs@gnu.org Cancel-Lock: sha1:YGjBnwOTfVOm1wJmaJbCAnKlHoA= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Mon Nov 07 13:44:47 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 1os1Ud-0002UY-BB for geh-help-gnu-emacs@m.gmane-mx.org; Mon, 07 Nov 2022 13:44:47 +0100 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1os1UQ-0002ly-6B; Mon, 07 Nov 2022 07:44:34 -0500 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 1ormVf-0003r5-Sk for help-gnu-emacs@gnu.org; Sun, 06 Nov 2022 15:44:51 -0500 Original-Received: from ciao.gmane.io ([116.202.254.214]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ormVe-0003eD-0o for help-gnu-emacs@gnu.org; Sun, 06 Nov 2022 15:44:51 -0500 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1ormVc-0009EU-N9 for help-gnu-emacs@gnu.org; Sun, 06 Nov 2022 21:44:48 +0100 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-Mailman-Approved-At: Mon, 07 Nov 2022 07:44:30 -0500 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-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.help:140776 Archived-At: > So is it all about what let/let* defaults to? [...] So for completeness we need: slet - always static let salet - static-adaptive let, defaults to static but don't change dynamic global binidngs with the same name, but binds new value for its reach alet - adaptive let, defaults to static if `lexical-binding' (which itself defautls to t), else defautls to dynamic. Also don't change existing globals from either binding styles into the other. (alet/alet* are also aliased from `let'/`let*'.) dalet - dynamic-adaptive let, defaults to dynamic, don't change static dlet - always dynamic For clarity and practical day-to-day use we need: Alias 'locals' to slet (locals as in local variables). A wrapper function or macro called 'opts' (as in "with options as") which will first check if such an option has been defined as a dynamic/special variable (i.e. with `defvar' or already existing in Emacs as an option, possibly defined in C even), and if all do exit it will just be like `dlet' and new values will be assieged for its reach and duration. So then the code would look like this (locals ((x 5) (y 8) ) ;; ... (opts ((fill-column 10)) (fill-paragraph) ) ;; ... ) and slet, salet, alet, dalet and dlet would seldom be used, at least not directly, but they would be there for anyone who'd want them. -- underground experts united https://dataswamp.org/~incal