From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Andreas Schwab Newsgroups: gmane.emacs.devel Subject: Re: Strange behavior of macro Date: Tue, 30 May 2006 12:35:08 +0200 Message-ID: References: NNTP-Posting-Host: main.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable X-Trace: sea.gmane.org 1148985339 13455 80.91.229.2 (30 May 2006 10:35:39 GMT) X-Complaints-To: usenet@sea.gmane.org NNTP-Posting-Date: Tue, 30 May 2006 10:35:39 +0000 (UTC) Cc: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Tue May 30 12:35:36 2006 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by ciao.gmane.org with esmtp (Exim 4.43) id 1Fl1ZN-0004Tj-9F for ged-emacs-devel@m.gmane.org; Tue, 30 May 2006 12:35:25 +0200 Original-Received: from localhost ([127.0.0.1] helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1Fl1ZM-000295-LQ for ged-emacs-devel@m.gmane.org; Tue, 30 May 2006 06:35:24 -0400 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1Fl1ZA-00028q-6t for emacs-devel@gnu.org; Tue, 30 May 2006 06:35:12 -0400 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1Fl1Z9-00028c-Oa for emacs-devel@gnu.org; Tue, 30 May 2006 06:35:11 -0400 Original-Received: from [199.232.76.173] (helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1Fl1Z9-00028Z-Mm for emacs-devel@gnu.org; Tue, 30 May 2006 06:35:11 -0400 Original-Received: from [195.135.220.2] (helo=mx1.suse.de) by monty-python.gnu.org with esmtps (TLS-1.0:DHE_RSA_AES_256_CBC_SHA:32) (Exim 4.52) id 1Fl1ev-0006dc-Cd for emacs-devel@gnu.org; Tue, 30 May 2006 06:41:09 -0400 Original-Received: from Relay1.suse.de (mail2.suse.de [195.135.221.8]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.suse.de (Postfix) with ESMTP id 0452AEF6E; Tue, 30 May 2006 12:35:10 +0200 (CEST) Original-To: "Herbert Euler" X-Yow: What's the MATTER Sid?.. Is your BEVERAGE unsatisfactory? In-Reply-To: (Herbert Euler's message of "Tue, 30 May 2006 18:31:47 +0800") User-Agent: Gnus/5.110006 (No Gnus v0.6) Emacs/22.0.50 (gnu/linux) X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:55473 Archived-At: "Herbert Euler" writes: >>From: Andreas Schwab >>To: "Herbert Euler" >>CC: emacs-devel@gnu.org >>Subject: Re: Strange behavior of macro >>Date: Tue, 30 May 2006 12:23:49 +0200 >> >>"Herbert Euler" writes: >> >> > Is the following in Emacs a expected behavior of macro? >> > >> > (defmacro m1 (v) >> > (let ((len (length (eval v)))) >> > `(quote ,len))) >> > =3D> m1 >>[...] >> > (m1 v) >> > =3D> error: (wrong-type-argument sequencep v) >> >>See (elisp)Eval During Expansion. > > OK, so it's an accepted behavior. Btw, in the test of GNU clisp, > it's safe to write such a macro: Emacs Lisp is using dynamic binding, not lexical binding. Andreas. --=20 Andreas Schwab, SuSE Labs, schwab@suse.de SuSE Linux Products GmbH, Maxfeldstra=DFe 5, 90409 N=FCrnberg, Germany PGP key fingerprint =3D 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED= 5 "And now for something completely different."