From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: ludo@gnu.org (Ludovic =?iso-8859-1?Q?Court=E8s?=) Newsgroups: gmane.lisp.guile.devel Subject: Re: define-syntax Date: Wed, 16 Jun 2010 00:38:41 +0200 Message-ID: <874oh3j4zy.fsf@gnu.org> References: <87bpbcm381.fsf@gnu.org> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Trace: dough.gmane.org 1276643982 21720 80.91.229.12 (15 Jun 2010 23:19:42 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Tue, 15 Jun 2010 23:19:42 +0000 (UTC) To: guile-devel@gnu.org Original-X-From: guile-devel-bounces+guile-devel=m.gmane.org@gnu.org Wed Jun 16 01:19:40 2010 connect(): No such file or directory Return-path: Envelope-to: guile-devel@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1OOfPk-0007bg-QE for guile-devel@m.gmane.org; Wed, 16 Jun 2010 01:19:40 +0200 Original-Received: from localhost ([127.0.0.1]:49798 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1OOfPe-0005vq-4V for guile-devel@m.gmane.org; Tue, 15 Jun 2010 19:19:22 -0400 Original-Received: from [140.186.70.92] (port=33733 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1OOenh-0000PR-Dl for guile-devel@gnu.org; Tue, 15 Jun 2010 18:40:10 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1OOenf-0005re-Vo for guile-devel@gnu.org; Tue, 15 Jun 2010 18:40:09 -0400 Original-Received: from lo.gmane.org ([80.91.229.12]:50704) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1OOenf-0005rP-Oy for guile-devel@gnu.org; Tue, 15 Jun 2010 18:40:07 -0400 Original-Received: from list by lo.gmane.org with local (Exim 4.69) (envelope-from ) id 1OOenb-0008QY-C3 for guile-devel@gnu.org; Wed, 16 Jun 2010 00:40:03 +0200 Original-Received: from acces.bordeaux.inria.fr ([193.50.110.5]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 16 Jun 2010 00:40:03 +0200 Original-Received: from ludo by acces.bordeaux.inria.fr with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 16 Jun 2010 00:40:03 +0200 X-Injected-Via-Gmane: http://gmane.org/ connect(): No such file or directory Original-Lines: 17 Original-X-Complaints-To: usenet@dough.gmane.org X-Gmane-NNTP-Posting-Host: acces.bordeaux.inria.fr X-URL: http://www.fdn.fr/~lcourtes/ X-Revolutionary-Date: 28 Prairial an 218 de la =?iso-8859-1?Q?R=E9volution?= X-PGP-Key-ID: 0xEA52ECF4 X-PGP-Key: http://www.fdn.fr/~lcourtes/ludovic.asc X-PGP-Fingerprint: 83C4 F8E5 10A3 3B4C 5BEA D15D 77DD 95E2 EA52 ECF4 X-OS: x86_64-unknown-linux-gnu User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.2 (gnu/linux) Cancel-Lock: sha1:oNgtPU0qTm+ZhQ3onsgpvsW2/9w= X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 3) X-BeenThere: guile-devel@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Developers list for Guile, the GNU extensibility library" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: guile-devel-bounces+guile-devel=m.gmane.org@gnu.org Errors-To: guile-devel-bounces+guile-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.lisp.guile.devel:10498 Archived-At: Hey! Andy Wingo writes: > Indeed + does resolve to whatever + was bound to before the definition; > it's just that when you define the + macro it usually defines at > compile-time too! By compiling ahead of time and exiting we leave + in > its pristine state. See also the discussion of > eval-syntax-expanders-when in psyntax.scm or in > http://www.scheme.com/csug8/system.html#./system:s78. Ooh, interesting. Thanks for the explanation! (I eventually found out about the problem in my constant folding macro, where bits of ‘eval-when’ in the right place did the trick.) Ludo’.