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.user Subject: Re: Dynamic variable binding Date: Thu, 13 Nov 2008 19:50:45 +0100 Message-ID: <87skpvxxx6.fsf@gnu.org> References: <8wro202o.fsf@vps203.linuxvps.org> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: ger.gmane.org 1226602315 4821 80.91.229.12 (13 Nov 2008 18:51:55 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 13 Nov 2008 18:51:55 +0000 (UTC) To: guile-user@gnu.org Original-X-From: guile-user-bounces+guile-user=m.gmane.org@gnu.org Thu Nov 13 19:52:56 2008 Return-path: Envelope-to: guile-user@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.50) id 1L0hJD-0004wo-5I for guile-user@m.gmane.org; Thu, 13 Nov 2008 19:52:51 +0100 Original-Received: from localhost ([127.0.0.1]:34703 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1L0hI5-0003xp-7b for guile-user@m.gmane.org; Thu, 13 Nov 2008 13:51:41 -0500 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1L0hHO-0003Vf-Ew for guile-user@gnu.org; Thu, 13 Nov 2008 13:50:58 -0500 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1L0hHM-0003TE-Cz for guile-user@gnu.org; Thu, 13 Nov 2008 13:50:57 -0500 Original-Received: from [199.232.76.173] (port=33672 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1L0hHL-0003Sz-V2 for guile-user@gnu.org; Thu, 13 Nov 2008 13:50:56 -0500 Original-Received: from main.gmane.org ([80.91.229.2]:56687 helo=ciao.gmane.org) by monty-python.gnu.org with esmtps (TLS-1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1L0hHL-0007uM-IV for guile-user@gnu.org; Thu, 13 Nov 2008 13:50:55 -0500 Original-Received: from list by ciao.gmane.org with local (Exim 4.43) id 1L0hHI-0002D4-TW for guile-user@gnu.org; Thu, 13 Nov 2008 18:50:52 +0000 Original-Received: from reverse-83.fdn.fr ([80.67.176.83]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 13 Nov 2008 18:50:52 +0000 Original-Received: from ludo by reverse-83.fdn.fr with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 13 Nov 2008 18:50:52 +0000 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 25 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: reverse-83.fdn.fr X-URL: http://www.fdn.fr/~lcourtes/ X-Revolutionary-Date: 23 Brumaire an 217 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: 821D 815D 902A 7EAB 5CEE D120 7FBA 3D4F EB1F 5364 X-OS: i686-pc-linux-gnu User-Agent: Gnus/5.11 (Gnus v5.11) Emacs/22.3 (gnu/linux) Cancel-Lock: sha1:jzwz3llslc8dkfTMD8GDyDo2afI= X-detected-operating-system: by monty-python.gnu.org: GNU/Linux 2.6, seldom 2.4 (older, 4) X-BeenThere: guile-user@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: General Guile related discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: guile-user-bounces+guile-user=m.gmane.org@gnu.org Errors-To: guile-user-bounces+guile-user=m.gmane.org@gnu.org Xref: news.gmane.org gmane.lisp.guile.user:6899 Archived-At: Hello, Sebastian Tennant writes: > The macro definition I was searching for is simply this: > > (define-macro (definer var val) ;var must be a symbol > `(module-define! (current-module) ,var ,val)) > > Wrapped within a 'for-each' this macro allows me to bind as many > variables as a like in a single stroke. > > Why not use the module namespace as a top-level hash table Dale? Isn't > that essentially what a module namespace is, or at least what it's for? > > Is there a really good reason to avoid doing this? Dynamic binding definition is compilation-unfriendly. Kjetil's proposed `define-lotsof' macro is more appropriate, as it can be fully evaluated at compile-time (should a compiler be used, that is), whereas the `module-define!' trick requires that compilation and execution be the one and same phase. Thanks, Ludo'.