From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Sebastian Tennant Newsgroups: gmane.lisp.guile.user Subject: Re: Dynamic variable binding Date: Thu, 13 Nov 2008 11:33:29 +0000 Message-ID: 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 1226577898 2740 80.91.229.12 (13 Nov 2008 12:04:58 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 13 Nov 2008 12:04:58 +0000 (UTC) To: guile-user@gnu.org Original-X-From: guile-user-bounces+guile-user=m.gmane.org@gnu.org Thu Nov 13 13:05:59 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 1L0awm-0003qK-Ab for guile-user@m.gmane.org; Thu, 13 Nov 2008 13:05:42 +0100 Original-Received: from localhost ([127.0.0.1]:59797 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1L0avb-0004sj-Rt for guile-user@m.gmane.org; Thu, 13 Nov 2008 07:04:03 -0500 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1L0avV-0004q1-N5 for guile-user@gnu.org; Thu, 13 Nov 2008 07:03:57 -0500 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1L0avT-0004my-1l for guile-user@gnu.org; Thu, 13 Nov 2008 07:03:56 -0500 Original-Received: from [199.232.76.173] (port=59505 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1L0avS-0004me-Hc for guile-user@gnu.org; Thu, 13 Nov 2008 07:03:54 -0500 Original-Received: from main.gmane.org ([80.91.229.2]:57061 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 1L0aSF-0007Jg-Tx for guile-user@gnu.org; Thu, 13 Nov 2008 06:33:44 -0500 Original-Received: from list by ciao.gmane.org with local (Exim 4.43) id 1L0aSA-0001uL-Ev for guile-user@gnu.org; Thu, 13 Nov 2008 11:33:38 +0000 Original-Received: from vps203.linuxvps.org ([91.186.7.203]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 13 Nov 2008 11:33:38 +0000 Original-Received: from sebyte by vps203.linuxvps.org with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 13 Nov 2008 11:33:38 +0000 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 27 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: vps203.linuxvps.org User-Agent: Gnus/5.110011 (No Gnus v0.11) Emacs/22.2 (gnu/linux) Cancel-Lock: sha1:X7NXj0fBoh24lls9p1IiDaKnE7Y= 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:6897 Archived-At: Quoth Sebastian Tennant : Hi all, Many thanks to all responders, especially to Ludo' for answering my question directly. 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? Apart from non-portablility, what difference does it make whether a variable is bound using 'define' or my 'definer' macro? Thanks once again. Sebastian