From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: A possible way for CC Mode to resolve its sluggishness Date: Fri, 26 Apr 2019 22:53:09 +0300 Message-ID: <83k1fgwnkq.fsf@gnu.org> References: <20190426193056.GC4720@ACM> Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="82249"; mail-complaints-to="usenet@blaine.gmane.org" Cc: bug-cc-mode@gnu.org, emacs-devel@gnu.org To: Alan Mackenzie Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Fri Apr 26 21:54:15 2019 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:256) (Exim 4.89) (envelope-from ) id 1hK6vG-000LJR-Ur for ged-emacs-devel@m.gmane.org; Fri, 26 Apr 2019 21:54:15 +0200 Original-Received: from localhost ([127.0.0.1]:51335 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hK6vF-00064V-P3 for ged-emacs-devel@m.gmane.org; Fri, 26 Apr 2019 15:54:13 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:46604) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hK6ub-00064O-Rd for emacs-devel@gnu.org; Fri, 26 Apr 2019 15:53:34 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:60294) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hK6uZ-0001Ae-CC; Fri, 26 Apr 2019 15:53:32 -0400 Original-Received: from [176.228.60.248] (port=2066 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1hK6uV-0007mo-1V; Fri, 26 Apr 2019 15:53:31 -0400 In-reply-to: <20190426193056.GC4720@ACM> (message from Alan Mackenzie on Fri, 26 Apr 2019 19:30:56 +0000) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 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.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:235967 Archived-At: > Date: Fri, 26 Apr 2019 19:30:56 +0000 > From: Alan Mackenzie > > (i) A CC Mode buffer will be partitioned into @dfn{syntactic cells}. > These will be things like a section of code, a comment, a string, a raw > string, a CPP construct .... Possibly even comment delimiters would > have their own cells. > > (ii) Syntactic cells will be implemented by a text property, c-syntax, > whose value will indicate the type of the cell, and possibly an > identifier for it. Neighbouring cells will always have distinct > c-syntax values. Can a syntactic cell have other syntactic cells embedded in it? Because if it can, you cannot use text properties for that, since text properties cannot overlap. > Thoughts? Why do you think this proposal will make CC Mode faster? Wouldn't computing and updating the cells in itself be expensive?