From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: "Stephen J. Turnbull" Newsgroups: gmane.emacs.devel Subject: Re: Raw string literals in Emacs lisp. Date: Sun, 03 Aug 2014 15:50:24 +0900 Message-ID: <8738dem5hr.fsf@uwakimon.sk.tsukuba.ac.jp> References: <878ungor1v.fsf@uwakimon.sk.tsukuba.ac.jp> <8761ijng08.fsf@uwakimon.sk.tsukuba.ac.jp> <871tt7lzro.fsf@fencepost.gnu.org> <53D567FD.4030708@porkrind.org> <87r412iobp.fsf@lifelogs.com> <53D9586F.6020705@porkrind.org> <87bns6in3g.fsf@lifelogs.com> <20140802084744.GA3541@acm.acm> <87vbqbqmn3.fsf@fencepost.gnu.org> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 X-Trace: ger.gmane.org 1407048669 7676 80.91.229.3 (3 Aug 2014 06:51:09 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sun, 3 Aug 2014 06:51:09 +0000 (UTC) Cc: emacs-devel@gnu.org To: David Kastrup Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Sun Aug 03 08:51:02 2014 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 1XDpdA-0006OM-PR for ged-emacs-devel@m.gmane.org; Sun, 03 Aug 2014 08:50:56 +0200 Original-Received: from localhost ([::1]:47045 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XDpdA-0004XI-BP for ged-emacs-devel@m.gmane.org; Sun, 03 Aug 2014 02:50:56 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:41146) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XDpd0-0004W5-8w for emacs-devel@gnu.org; Sun, 03 Aug 2014 02:50:53 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XDpcs-0001Ex-Pb for emacs-devel@gnu.org; Sun, 03 Aug 2014 02:50:46 -0400 Original-Received: from mgmt1.sk.tsukuba.ac.jp ([130.158.97.223]:56849) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XDpcs-00019y-Ap for emacs-devel@gnu.org; Sun, 03 Aug 2014 02:50:38 -0400 Original-Received: from uwakimon.sk.tsukuba.ac.jp (uwakimon.sk.tsukuba.ac.jp [130.158.99.156]) by mgmt1.sk.tsukuba.ac.jp (Postfix) with ESMTP id D6ED03FA0AEC; Sun, 3 Aug 2014 15:50:24 +0900 (JST) Original-Received: by uwakimon.sk.tsukuba.ac.jp (Postfix, from userid 1000) id C94E31A28DD; Sun, 3 Aug 2014 15:50:24 +0900 (JST) In-Reply-To: <87vbqbqmn3.fsf@fencepost.gnu.org> X-Mailer: VM undefined under 21.5 (beta34) "kale" acf1c26e3019 XEmacs Lucid (x86_64-unknown-linux) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x X-Received-From: 130.158.97.223 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:173398 Archived-At: David Kastrup writes: > r#"?\" is a complete string. How do you parse it backwards? By catching the parse error when parsing it as a (normal) string, then reparsing it as a raw string (ie, running backwards over the characters until you hit the second ?"), and check for a leading #r (two tokens of lookahead). Thanks for the example, David, XEmacs is buggy here (or maybe terminating a rawstring with \ will be declared illegal ;-).