From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Michael Heerdegen Newsgroups: gmane.emacs.devel Subject: Re: Question on pcase Date: Fri, 23 Oct 2015 14:23:24 +0200 Message-ID: <87lhat22pv.fsf@web.de> References: <871tcngdv2.fsf@gmail.com> <87k2qe1u09.fsf@web.de> <83r3kmrtat.fsf@gnu.org> <87k2qdeqym.fsf@gmail.com> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1445603086 19038 80.91.229.3 (23 Oct 2015 12:24:46 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 23 Oct 2015 12:24:46 +0000 (UTC) To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Fri Oct 23 14:24:37 2015 Return-path: Envelope-to: ged-emacs-devel@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 1ZpbOb-00030h-AO for ged-emacs-devel@m.gmane.org; Fri, 23 Oct 2015 14:24:33 +0200 Original-Received: from localhost ([::1]:38104 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZpbOa-0006AS-LP for ged-emacs-devel@m.gmane.org; Fri, 23 Oct 2015 08:24:32 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:54669) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZpbNw-0005YM-2A for emacs-devel@gnu.org; Fri, 23 Oct 2015 08:23:52 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZpbNr-0002G1-Q4 for emacs-devel@gnu.org; Fri, 23 Oct 2015 08:23:52 -0400 Original-Received: from plane.gmane.org ([80.91.229.3]:55144) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZpbNr-0002Fm-Jx for emacs-devel@gnu.org; Fri, 23 Oct 2015 08:23:47 -0400 Original-Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1ZpbNk-0002BM-Lw for emacs-devel@gnu.org; Fri, 23 Oct 2015 14:23:40 +0200 Original-Received: from ip-90-186-0-245.web.vodafone.de ([90.186.0.245]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Fri, 23 Oct 2015 14:23:40 +0200 Original-Received: from michael_heerdegen by ip-90-186-0-245.web.vodafone.de with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Fri, 23 Oct 2015 14:23:40 +0200 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 32 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: ip-90-186-0-245.web.vodafone.de User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.0.50 (gnu/linux) Cancel-Lock: sha1:+7PTC/atspXqcr7s6sob+XIh14o= X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 80.91.229.3 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.14 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-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:192480 Archived-At: Hi Oleh, I guess you might like something like this: --8<---------------cut here---------------start------------->8--- (defun pcase-demystify-pattern (pattern) (pcase--u `((,(pcase--match '-tested-expression- (pcase--macroexpand pattern)) ,(lambda (vars) `(progn ,@(mapcar (lambda (b) `(-bind- ,(car b) ,(cdr b))) vars))))))) --8<---------------cut here---------------end--------------->8--- You need to quote the pattern because this is a function. (pcase-demystify-pattern '`(,_ . ,(and (pred functionp) f))) ==> (if (consp -tested-expression-) (let* ((#1=#:x (cdr -tested-expression-))) (if (functionp #1#) (progn (-bind- f #1#)) nil)) nil) Michael.