From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel Subject: Re: Why tree-sitter instead of Semantic? (was Re: CC Mode with font-lock-maximum-decoration 2) Date: Tue, 16 Aug 2022 13:19:50 -0400 Message-ID: References: <83o7wuva9o.fsf@gnu.org> <83mtceupbx.fsf@gnu.org> <83lerxvfnu.fsf@gnu.org> <838rnxvdcq.fsf@gnu.org> <83r11ptksn.fsf@gnu.org> <83a68dti6w.fsf@gnu.org> <87a687sjnv.fsf@yahoo.com> <83zgg4fm9p.fsf@gnu.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="6971"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) Cc: Eli Zaretskii , luangruo@yahoo.com, jostein@secure.kjonigsen.net, jostein@kjonigsen.net, acm@muc.de, emacs-devel@gnu.org, casouri@gmail.com To: Lynn Winebarger Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Tue Aug 16 19:21:28 2022 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 1oO0Fr-0001Yo-1y for ged-emacs-devel@m.gmane-mx.org; Tue, 16 Aug 2022 19:21:27 +0200 Original-Received: from localhost ([::1]:42564 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oO0Fp-0004pI-Jw for ged-emacs-devel@m.gmane-mx.org; Tue, 16 Aug 2022 13:21:25 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:33242) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oO0EQ-00048J-8N for emacs-devel@gnu.org; Tue, 16 Aug 2022 13:19:58 -0400 Original-Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:43283) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oO0EN-0008Ia-U6; Tue, 16 Aug 2022 13:19:57 -0400 Original-Received: from pmg2.iro.umontreal.ca (localhost.localdomain [127.0.0.1]) by pmg2.iro.umontreal.ca (Proxmox) with ESMTP id 91846804AB; Tue, 16 Aug 2022 13:19:54 -0400 (EDT) Original-Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg2.iro.umontreal.ca (Proxmox) with ESMTP id A024380070; Tue, 16 Aug 2022 13:19:52 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1660670392; bh=7ouHcdZ2GwPmqjaMZ4Ch6YHQeEom+r+Zt5L3r4GgeMM=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=lV2RTYvGvLZBH6ytgz6spUCsN7WTmw/qDe7GRQbGy5QpBy0LcD0Aqen1G8EqV7xMn h8wxMzaH9kolXaFbb7CdJMR5pLU0QTmq3oj90WZ2xizOFqi5pRJIgu4dIG53SmgpdS +kwts7hP5FIUS3ip6ZP/m4pvAzJ6CTGnLZ6ikkkNJg4RSUbBJifJ4fxVsdAqqskVoX Yy4mbs2zkDLsNCVxsZnFr9sRECqrjL7RME92T0Snh2AbO00jcBAnMYaQRjYT+HVqhZ +aL+Ol3kKHZkpFPq4FGiejYbp/nSfquq4FJq+Afz2AIsXtqN4HmCejsWbSzyNvHPg3 p+MiSnGhfqWgA== Original-Received: from pastel (unknown [45.72.195.111]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id 45E891202C1; Tue, 16 Aug 2022 13:19:52 -0400 (EDT) In-Reply-To: (Lynn Winebarger's message of "Tue, 16 Aug 2022 12:33:57 -0400") Received-SPF: pass client-ip=132.204.25.50; envelope-from=monnier@iro.umontreal.ca; helo=mailscanner.iro.umontreal.ca X-Spam_score_int: -42 X-Spam_score: -4.3 X-Spam_bar: ---- X-Spam_report: (-4.3 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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" Xref: news.gmane.io gmane.emacs.devel:293510 Archived-At: > I'm only saying there's a disconnect between Jostein's report and Po's > response. It's probably a UI issue. There's a checkbox in a dropdown > menu that says "Source Code Parsers (Semantic)". FWIW, I've used (semantic-mode 1) to enable CEDET in Emacs's C source files and that was all that was needed to get TAB completion of struct field's names working. I haven't used it for much more than that, admittedly. > * "${" and "{" could both open a block closed by "}" Why do you think it's a problem? > * if/fi, case/esac, etc, or possibly all keyword blocks are closed by "end" These aren't handled by syntax tables. > * "variadic" structures like try/catch+/finally? Same. > It's not clear from the doc just how much this reliance on the syntax > table based block identification is baked into the lexer/parser > generation. IIRC the syntax-tables are used for speed so as to skip whole blocks without fully parsing their contents. Stefan