From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Kevin Rodgers Newsgroups: gmane.emacs.help Subject: Re: Easy regexp issue Date: Fri, 19 Jan 2007 23:09:42 -0700 Message-ID: References: <1169145159.761299.289970@38g2000cwa.googlegroups.com> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Trace: sea.gmane.org 1169273424 20698 80.91.229.12 (20 Jan 2007 06:10:24 GMT) X-Complaints-To: usenet@sea.gmane.org NNTP-Posting-Date: Sat, 20 Jan 2007 06:10:24 +0000 (UTC) Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Sat Jan 20 07:10:22 2007 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.50) id 1H89Qj-0007l5-De for geh-help-gnu-emacs@m.gmane.org; Sat, 20 Jan 2007 07:10:21 +0100 Original-Received: from localhost ([127.0.0.1] helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1H89Qj-0006OD-D4 for geh-help-gnu-emacs@m.gmane.org; Sat, 20 Jan 2007 01:10:21 -0500 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1H89QN-0006L9-Rf for help-gnu-emacs@gnu.org; Sat, 20 Jan 2007 01:09:59 -0500 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1H89QL-0006K2-Sv for help-gnu-emacs@gnu.org; Sat, 20 Jan 2007 01:09:59 -0500 Original-Received: from [199.232.76.173] (helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1H89QL-0006Jz-JT for help-gnu-emacs@gnu.org; Sat, 20 Jan 2007 01:09:57 -0500 Original-Received: from [80.91.229.2] (helo=ciao.gmane.org) by monty-python.gnu.org with esmtps (TLS-1.0:RSA_AES_256_CBC_SHA:32) (Exim 4.52) id 1H89QL-0001Th-5i for help-gnu-emacs@gnu.org; Sat, 20 Jan 2007 01:09:57 -0500 Original-Received: from list by ciao.gmane.org with local (Exim 4.43) id 1H89Q8-0000o7-9R for help-gnu-emacs@gnu.org; Sat, 20 Jan 2007 07:09:45 +0100 Original-Received: from c-24-9-156-178.hsd1.co.comcast.net ([24.9.156.178]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sat, 20 Jan 2007 07:09:44 +0100 Original-Received: from kevin.d.rodgers by c-24-9-156-178.hsd1.co.comcast.net with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sat, 20 Jan 2007 07:09:44 +0100 X-Injected-Via-Gmane: http://gmane.org/ Original-To: help-gnu-emacs@gnu.org Original-Lines: 26 Original-X-Complaints-To: usenet@sea.gmane.org X-Gmane-NNTP-Posting-Host: c-24-9-156-178.hsd1.co.comcast.net User-Agent: Thunderbird 1.5.0.9 (Macintosh/20061207) In-Reply-To: X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:40475 Archived-At: Barry Margolin wrote: > In article , > Kevin Rodgers wrote: >> See the LITERAL argument in the doc string for replace-regexp-in-string: >> >> (replace-regexp-in-string "/" "\\" "c:/emacs/lisp/" nil t) > > Or > > (replace-regexp-in-string "/" "\\\\" "c:/emacs/lisp/") > > This is necessary because backslash is an escape character at two > levels: Lisp strings and regexp replacement strings (e.g. the sequence > \1 in the replacement represents a group matched in the regexp). So the > replacement string needs to be \\, and you need to escape each \ in the > string. That was my point: If you don't need the backslash to be interpreted in the replacement string as a submatch reference, specify a non-nil LITERAL argument -- which should execute faster to boot. Of course, there's no way around the need to escape the backslash in the Lisp string. -- Kevin Rodgers Denver, Colorado, USA