From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Eric Abrahamsen Newsgroups: gmane.emacs.devel Subject: Re: Make peg.el a built-in library? Date: Mon, 27 Sep 2021 20:52:38 -0700 Message-ID: <87sfxp4ard.fsf@ericabrahamsen.net> References: <875yvtbbn3.fsf@ericabrahamsen.net> <87bl5k87hq.fsf@alphapapa.net> <87fsuvpod4.fsf@ericabrahamsen.net> <874ka7wqko.fsf@gmail.com> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="32010"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) Cc: eller.helmut@gmail.com, Augusto Stoffel , emacs-devel@gnu.org To: Richard Stallman Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Tue Sep 28 05:53:42 2021 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 1mV4BZ-00086W-Vb for ged-emacs-devel@m.gmane-mx.org; Tue, 28 Sep 2021 05:53:42 +0200 Original-Received: from localhost ([::1]:58172 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mV4BY-0008P7-Pj for ged-emacs-devel@m.gmane-mx.org; Mon, 27 Sep 2021 23:53:40 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:43104) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mV4Ak-0007jG-Pc for emacs-devel@gnu.org; Mon, 27 Sep 2021 23:52:50 -0400 Original-Received: from mail.ericabrahamsen.net ([52.70.2.18]:49036) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mV4Ai-00069Z-Ux; Mon, 27 Sep 2021 23:52:50 -0400 Original-Received: from localhost (c-71-197-232-156.hsd1.wa.comcast.net [71.197.232.156]) (Authenticated sender: eric@ericabrahamsen.net) by mail.ericabrahamsen.net (Postfix) with ESMTPSA id 3CD59FA024; Tue, 28 Sep 2021 03:52:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ericabrahamsen.net; s=mail; t=1632801160; bh=HGPCc1UwmsBUAMeaqyfwcAcKmURVGXXWW5Jkbh4hlTA=; h=From:To:Cc:Subject:References:Date:In-Reply-To:From; b=rem7kby8ZtQIHLhdE4XNNMipuppx9U+kJeDyE9xIyqyL2XdrU1jN7TsZqjtnFjlN9 doDNp8LW2SDLbJ5/QZl5u6k469bugtuIwuv32S4srf0v0d1P1gubr6TTtaauenPI7q 2ipuBtVf0JHRjRMU5ln+AnuqitOLUiIeME6Wad8o= In-Reply-To: (Richard Stallman's message of "Mon, 27 Sep 2021 18:34:29 -0400") Received-SPF: pass client-ip=52.70.2.18; envelope-from=eric@ericabrahamsen.net; helo=mail.ericabrahamsen.net X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=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: 2.1.23 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" Xref: news.gmane.io gmane.emacs.devel:275645 Archived-At: On 09/27/21 18:34 PM, Richard Stallman wrote: > [[[ To any NSA and FBI agents reading my email: please consider ]]] > [[[ whether defending the US Constitution against all enemies, ]]] > [[[ foreign or domestic, requires you to follow Snowden's example. ]]] > > What is a PEG? A Parsing Expression Grammar: https://en.wikipedia.org/wiki/Parsing_expression_grammar Basically a way of composing a parser out of smaller regexp-like expressions. They can be very useful in a wide variety of situations.