From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.help Subject: Re: Faking local dynamic function bindings Date: Tue, 28 Jan 2014 22:50:50 -0500 Message-ID: References: NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1390967484 31551 80.91.229.3 (29 Jan 2014 03:51:24 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 29 Jan 2014 03:51:24 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Wed Jan 29 04:51:31 2014 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1W8MBV-0006ri-5M for geh-help-gnu-emacs@m.gmane.org; Wed, 29 Jan 2014 04:51:29 +0100 Original-Received: from localhost ([::1]:40358 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1W8MBU-0002nG-Oq for geh-help-gnu-emacs@m.gmane.org; Tue, 28 Jan 2014 22:51:28 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:35116) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1W8MBE-0002mx-Qb for help-gnu-emacs@gnu.org; Tue, 28 Jan 2014 22:51:20 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1W8MB7-0004cV-Gn for help-gnu-emacs@gnu.org; Tue, 28 Jan 2014 22:51:12 -0500 Original-Received: from plane.gmane.org ([80.91.229.3]:47672) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1W8MB7-0004cR-9V for help-gnu-emacs@gnu.org; Tue, 28 Jan 2014 22:51:05 -0500 Original-Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1W8MB6-0006jn-8w for help-gnu-emacs@gnu.org; Wed, 29 Jan 2014 04:51:04 +0100 Original-Received: from 69-165-152-57.dsl.teksavvy.com ([69.165.152.57]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 29 Jan 2014 04:51:04 +0100 Original-Received: from monnier by 69-165-152-57.dsl.teksavvy.com with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 29 Jan 2014 04:51:04 +0100 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 41 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: 69-165-152-57.dsl.teksavvy.com User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (gnu/linux) Cancel-Lock: sha1:wbYO+IgqwArWFEoeJ68eK4WJLis= X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 80.91.229.3 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:95745 Archived-At: > (defun foo (sexpr) > (eval > `(cl-macrolet ((contains (regexp) > `(string-match ,regexp string))) > (sort (delq nil (mapcar #'(lambda (item) > (let ((string (assq item strings-alist))) > (when ,sexpr) > string)) > items-alist)) > 'string<)))) IIUC, sexpr is only known very late (like much later than when you byte-compile this file). If that's the case, there's no avoiding `eval'. But you can move the eval closer to sexpr: (defun foo (sexpr) (sort (delq nil (mapcar #'(lambda (item) (let ((string (assq item strings-alist))) (when (eval `(cl-macrolet ((contains (regexp) `(string-match ,regexp ,string))) ,sexpr)) string)) items-alist)) #'string<))) And of course, you don't need `contains' to be a macro: (defun foo (sexpr) (sort (delq nil (mapcar #'(lambda (item) (let ((string (assq item strings-alist))) (when (eval `(cl-flet ((contains (regexp) (string-match regexp ,string))) ,sexpr)) string)) items-alist)) #'string<))) -- Stefan