From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: progmodes/project.el and search paths Date: Sat, 15 Aug 2015 10:05:18 +0300 Message-ID: <83zj1tm3pt.fsf@gnu.org> References: <55BE209F.1000009@siege-engine.com> <55BE509B.2080307@yandex.ru> <55BEC1B5.6060204@gmail.com> <86twsgfiuc.fsf@stephe-leake.org> <87mvy2kjxa.fsf@esperi.org.uk> <86si7t11li.fsf@stephe-leake.org> <87lhdkzmdv.fsf@isaac.fritz.box> <86pp2wzcaa.fsf@stephe-leake.org> <877fp3z8i7.fsf@isaac.fritz.box> <86bnefyu0b.fsf@stephe-leake.org> <87k2t0yfz9.fsf@isaac.fritz.box> <86tws4wrar.fsf@stephe-leake.org> <87egj8y0wi.fsf@isaac.fritz.box> <87lhdf1k2a.fsf@esperi.org.uk> <55CC880C.4010008@yandex.ru> <55CDD66F.2080005@siege-engine.com> <55CE6C11.5070606@yandex.ru> Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org X-Trace: ger.gmane.org 1439622358 17141 80.91.229.3 (15 Aug 2015 07:05:58 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sat, 15 Aug 2015 07:05:58 +0000 (UTC) Cc: nix@esperi.org.uk, emacs-devel@gnu.org, stephen_leake@stephe-leake.org, deng@randomsample.de, eric@siege-engine.com To: Dmitry Gutov Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Sat Aug 15 09:05:49 2015 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1ZQVXI-0004XK-Qr for ged-emacs-devel@m.gmane.org; Sat, 15 Aug 2015 09:05:48 +0200 Original-Received: from localhost ([::1]:49246 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZQVXH-0005G4-NV for ged-emacs-devel@m.gmane.org; Sat, 15 Aug 2015 03:05:47 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:54711) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZQVWx-0005Ff-2v for emacs-devel@gnu.org; Sat, 15 Aug 2015 03:05:27 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZQVWt-0007yu-5z for emacs-devel@gnu.org; Sat, 15 Aug 2015 03:05:27 -0400 Original-Received: from mtaout26.012.net.il ([80.179.55.182]:60271) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZQVWs-0007yd-UG for emacs-devel@gnu.org; Sat, 15 Aug 2015 03:05:23 -0400 Original-Received: from conversion-daemon.mtaout26.012.net.il by mtaout26.012.net.il (HyperSendmail v2007.08) id <0NT4001003HQGT00@mtaout26.012.net.il> for emacs-devel@gnu.org; Sat, 15 Aug 2015 10:08:56 +0300 (IDT) Original-Received: from HOME-C4E4A596F7 ([87.69.4.28]) by mtaout26.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0NT400KWP3UWTQ50@mtaout26.012.net.il>; Sat, 15 Aug 2015 10:08:56 +0300 (IDT) In-reply-to: <55CE6C11.5070606@yandex.ru> X-012-Sender: halo1@inter.net.il X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x X-Received-From: 80.179.55.182 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.14 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-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:188805 Archived-At: > From: Dmitry Gutov > Date: Sat, 15 Aug 2015 01:30:41 +0300 > Cc: Stephen Leake , emacs-devel@gnu.org > > > 3) Iterative parsing, so each invocation of the parser only executes > > across a single tag. > > > > This means that if parsing fails, we just move forward one lexical token > > and try again. This lets the parser just wash over anything it doesn't > > get. > > AFAIK, parsers in general try to ignore errors, or else you wouldn't be > able to get any useful information, after compilation fails, about any > errors after the first one. Compiler parsers indeed do that, but AFAIK not at lexical token granularity. I think they throw away much larger portions of the parse tree before trying to resync. IME, when a compiler reports an error, it also frequently reports additional bogus errors about unrelated symbols.