From mboxrd@z Thu Jan  1 00:00:00 1970
Path: news.gmane.org!not-for-mail
From: Thien-Thi Nguyen <ttn@glug.org>
Newsgroups: gmane.emacs.help
Subject: Re: Lisp code to expand /~ and // but not env vars?
Date: Mon, 03 Oct 2005 22:40:48 +0200
Organization: sometimes
Message-ID: <7ehdbyqqpb.fsf@ada2.unipv.it>
References: <mailman.9471.1128294372.20277.help-gnu-emacs@gnu.org>
NNTP-Posting-Host: main.gmane.org
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
X-Trace: sea.gmane.org 1128372202 29293 80.91.229.2 (3 Oct 2005 20:43:22 GMT)
X-Complaints-To: usenet@sea.gmane.org
NNTP-Posting-Date: Mon, 3 Oct 2005 20:43:22 +0000 (UTC)
Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Mon Oct 03 22:43:13 2005
Return-path: <help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org>
Original-Received: from lists.gnu.org ([199.232.76.165])
	by ciao.gmane.org with esmtp (Exim 4.43)
	id 1EMX8L-0000oR-V0
	for geh-help-gnu-emacs@m.gmane.org; Mon, 03 Oct 2005 22:42:02 +0200
Original-Received: from localhost ([127.0.0.1] helo=lists.gnu.org)
	by lists.gnu.org with esmtp (Exim 4.43)
	id 1EMX8L-0001Kh-Fp
	for geh-help-gnu-emacs@m.gmane.org; Mon, 03 Oct 2005 16:42:01 -0400
Original-Path: shelby.stanford.edu!newsfeed.stanford.edu!cyclone.bc.net!newspump.monmouth.com!newspeer.monmouth.com!newsfeed.icl.net!newsfeed.fjserv.net!newsfeed.freenet.de!news.tiscali.de!uio.no!quimby.gnus.org!not-for-mail
Original-Newsgroups: gnu.emacs.help
Original-Lines: 17
Original-NNTP-Posting-Host: ada2.unipv.it
Original-X-Trace: quimby.gnus.org 1128371908 17528 193.204.44.145 (3 Oct 2005 20:38:28
	GMT)
Original-X-Complaints-To: usenet@quimby.gnus.org
Original-NNTP-Posting-Date: Mon, 3 Oct 2005 20:38:28 +0000 (UTC)
User-Agent: Gnus/5.11 (Gnus v5.11) Emacs/22.0.50 (gnu/linux)
Cancel-Lock: sha1:Nzt47e/wUw8kaS3VtgUoeI72qKY=
Original-Xref: shelby.stanford.edu gnu.emacs.help:134317
Original-To: help-gnu-emacs@gnu.org
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 <help-gnu-emacs.gnu.org>
List-Unsubscribe: <http://lists.gnu.org/mailman/listinfo/help-gnu-emacs>,
	<mailto:help-gnu-emacs-request@gnu.org?subject=unsubscribe>
List-Archive: <http://lists.gnu.org/pipermail/help-gnu-emacs>
List-Post: <mailto:help-gnu-emacs@gnu.org>
List-Help: <mailto:help-gnu-emacs-request@gnu.org?subject=help>
List-Subscribe: <http://lists.gnu.org/mailman/listinfo/help-gnu-emacs>,
	<mailto:help-gnu-emacs-request@gnu.org?subject=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:29890
Archived-At: <http://permalink.gmane.org/gmane.emacs.help/29890>

"Drew Adams" <drew.adams@oracle.com> writes:

> Can anyone suggest a way to do this /~ and // conversion in Lisp?

double the dollar signs in the arg to `substitute-in-file-name'.
something like:

given-input => "def/~/abc/$HOME"

(double-dollar-signs given-input) => "def/~/abc/$$HOME"

(substitute-in-file-name 
  (double-dollar-signs given-input)) => "~/abc/$HOME"

you can write `double-dollar-signs' in various ways...

thi