From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Michael Heerdegen Newsgroups: gmane.emacs.devel Subject: Re: Why is FUNC in cl-callf not allowed to be an expression? Date: Thu, 23 May 2019 03:50:38 +0200 Message-ID: <874l5m2b2p.fsf@web.de> References: <874l631ek1.fsf@web.de> <87pnoqtuhm.fsf@web.de> <87r2961gox.fsf@web.de> <87mujohasa.fsf@web.de> <87a7fn3c6c.fsf@web.de> <875zqabh3t.fsf@web.de> <87zhnma11c.fsf@web.de> <871s0y3weo.fsf@web.de> <87tvdshew9.fsf@web.de> <87ftp7palg.fsf@web.de> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="=-=-=" Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="147352"; mail-complaints-to="usenet@blaine.gmane.org" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) Cc: emacs-devel@gnu.org To: Stefan Monnier Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Thu May 23 04:05:26 2019 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:256) (Exim 4.89) (envelope-from ) id 1hTd6j-000c77-H5 for ged-emacs-devel@m.gmane.org; Thu, 23 May 2019 04:05:25 +0200 Original-Received: from localhost ([127.0.0.1]:56147 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hTd6d-0006QQ-DT for ged-emacs-devel@m.gmane.org; Wed, 22 May 2019 22:05:19 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:38290) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hTd5f-00068F-B4 for emacs-devel@gnu.org; Wed, 22 May 2019 22:04:20 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hTcsc-0001OJ-Le for emacs-devel@gnu.org; Wed, 22 May 2019 21:50:51 -0400 Original-Received: from mout.web.de ([212.227.15.3]:43229) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1hTcsc-0001N9-9A for emacs-devel@gnu.org; Wed, 22 May 2019 21:50:50 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=web.de; s=dbaedf251592; t=1558576240; bh=hOKDW1Bp8XGbyVPq7mKBd4b5kU9ga1ezRSrUgafZGaE=; h=X-UI-Sender-Class:From:To:Cc:Subject:References:Date:In-Reply-To; b=gQtvOwhh8xEjhKytc2N3zEUDdpR/V6PsPrU6hJhx2Ubc7ovK2r7IljbysKBgsa2S3 P1YNivq5AhWI18AkfFxfqR44rV0rw1R88WKPv3zCK7958e/6onN48N7sfUK7YMzSx8 IPAJnhgVOgbEUFLOmO4SQ7h7A30CM0WsNKOPV+YI= X-UI-Sender-Class: c548c8c5-30a9-4db5-a2e7-cb6cb037b8f9 Original-Received: from drachen.dragon ([188.110.143.34]) by smtp.web.de (mrweb003 [213.165.67.108]) with ESMTPSA (Nemesis) id 0M4ZVE-1gi5pU1w8C-00yjXR; Thu, 23 May 2019 03:50:40 +0200 In-Reply-To: <87ftp7palg.fsf@web.de> (Michael Heerdegen's message of "Wed, 22 May 2019 03:00:11 +0200") X-Provags-ID: V03:K1:CfKfZoYvTq97KR5v/OrG1Avn0nN1cByMScZJ1h0U/sBvtXYN41b kx0l5WM3ewBzAqZUvpzgq2SF2c3lsW2O/B4LrlsPP7fOydzYu6QtWv3KaxpVjpDmRL9B9dp jdWFrmLG931sWls6Ai4UlG0BahRoIFwe+DkN33GSR4K/GAFXYEJ/z5A7jZTQD8d73Xqbqoy piaitkGPHYjM6Q6pPB2dA== X-UI-Out-Filterresults: notjunk:1;V03:K0:qVkZqLLaEoA=:SvNEmhFQWr4EsvW0J4/lfx HrbKOqOV0c0nnHr87tfD2/IrlUTPrOoSrwrymEZeaWiG3UqYRj5BVXJv+B0muXVrp2aGG/LbI M8oPxmrrM6tohINW345PTyUmIlS17ezKAKE7bvdBDzniwIjeBQGHr4AbdMG5LI/ZBmxKEG82c An+U6umvdRD4WGM6YfcNWhPEEyBQqTcK335mZ6xT0e5vbFtN3IDm/c+kfObsO0K/AlVOfklH+ uTJfxYqs+lgfIChYZuAzh14Z1ghbE1PQM6hlRXsIWXDhjhOF6XzcCIBEzaZBnh6gYO0TE3Gaz dZwKcLjSg1NNb6ISCjTkzaeaGLfwHdctXFrjk/RBYNe0oTlK8U4OzBSqHMmHwplV8PMopkqAg RG6ayHNa7+JkMSZwObXsUjVi9YplnRFHaG7HeRwibY0jfoH71aYaHtsOwz85niqNHPuX4ff4c y1PffQYXu8T11KiE6UqDHz6ZwuBagbs00caRgkiU1vafUfInJuC3vwMGhV9AUeW9s2/uo9EWq GMuAxxyCFCFS54sLb/vJV91Ajrb1juUc9arYdlofhNDClhotV3UWUstGvJBapyZW5E568Oxpb 29oL9l8pRlrTazdKKpKcs2CtDe69Mc8VCNIvod1/Vn2qjRTvfeogmzei1L8b870kSL0yybWAa Z/dZJRsa+mHIJjCE9imO/fObUmB1X6gyWUr1R4kkLJyMJsCkp122V+VhHN17asq7ankCVF8zi P9oq73QnuHZRDfTcWuzRuUHXU/DdoP2zhC00MOv8t0k6imeOzgzxhd5PykxJbvgQ0kfp7HFg X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 212.227.15.3 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:236919 Archived-At: --=-=-= Content-Type: text/plain Michael Heerdegen writes: > With our current implementation of local macros, only the expansion > (compile) time matters, so this not so simple to do: > > (let ((l '(0 1 2 3)) > (i '(0 1 2 3)) > (flag nil)) > (cl-macrolet ((yyy () (if flag '(nth 2 l) '(nth 3 i)))) > (cl-symbol-macrolet ((xxx (yyy))) > (setf xxx 0) > (list l i)))) > |- void-variable: flag Most Common Lisps seem to barf in this case (macro definition referencing local variables). I only found it explicitly described here: http://www.lispworks.com/documentation/HyperSpec/Body/s_flet_.htm#macrolet Anyway, I would like to speak out that one should not do that, how about this? --=-=-= Content-Type: text/x-diff Content-Disposition: inline; filename=0001-doc-misc-cl.texi-Macro-Bindings-State-expansion-time.patch Content-Transfer-Encoding: quoted-printable =46rom ae8e42cf23e4883aed0177aad30d56f0e3e5086b Mon Sep 17 00:00:00 2001 From: Michael Heerdegen Date: Thu, 23 May 2019 03:33:04 +0200 Subject: [PATCH] * doc/misc/cl.texi (Macro Bindings): State expansion time =2D-- doc/misc/cl.texi | 2 ++ 1 file changed, 2 insertions(+) diff --git a/doc/misc/cl.texi b/doc/misc/cl.texi index eb06791ba9..c96b9b6c3e 100644 =2D-- a/doc/misc/cl.texi +++ b/doc/misc/cl.texi @@ -1360,6 +1360,8 @@ Macro Bindings affect only calls that appear physically within the body @var{forms}, possibly after expansion of other macros in the body. + +Like global macros local macros are expanded at compile-time. @end defmac @defmac cl-symbol-macrolet (bindings@dots{}) forms@dots{} =2D- 2.20.1 --=-=-= Content-Type: text/plain Michael. --=-=-=--