From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Michael Heerdegen Newsgroups: gmane.emacs.help Subject: Re: Quick pcase question Date: Wed, 02 Mar 2016 13:27:20 +0100 Message-ID: <87bn6xvzdj.fsf@web.de> References: <87lh615gt8.fsf@ericabrahamsen.net> <87mvqhw3a4.fsf@web.de> <87ziuh3z6p.fsf@ericabrahamsen.net> <87h9gpw1mx.fsf@web.de> <87vb553xfp.fsf@ericabrahamsen.net> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1456921679 13372 80.91.229.3 (2 Mar 2016 12:27:59 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 2 Mar 2016 12:27:59 +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 Mar 02 13:27:51 2016 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 1ab5sb-0000Bo-0H for geh-help-gnu-emacs@m.gmane.org; Wed, 02 Mar 2016 13:27:49 +0100 Original-Received: from localhost ([::1]:55996 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ab5sX-0005RO-9q for geh-help-gnu-emacs@m.gmane.org; Wed, 02 Mar 2016 07:27:45 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:55137) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ab5sL-0005RE-Qb for help-gnu-emacs@gnu.org; Wed, 02 Mar 2016 07:27:34 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ab5sG-00016f-MN for help-gnu-emacs@gnu.org; Wed, 02 Mar 2016 07:27:33 -0500 Original-Received: from plane.gmane.org ([80.91.229.3]:41930) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ab5sG-00016H-FB for help-gnu-emacs@gnu.org; Wed, 02 Mar 2016 07:27:28 -0500 Original-Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1ab5sE-0008TX-5R for help-gnu-emacs@gnu.org; Wed, 02 Mar 2016 13:27:26 +0100 Original-Received: from dslb-094-218-223-112.094.218.pools.vodafone-ip.de ([94.218.223.112]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 02 Mar 2016 13:27:26 +0100 Original-Received: from michael_heerdegen by dslb-094-218-223-112.094.218.pools.vodafone-ip.de with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 02 Mar 2016 13:27:26 +0100 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 27 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: dslb-094-218-223-112.094.218.pools.vodafone-ip.de User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.0.91 (gnu/linux) Cancel-Lock: sha1:rad0zmnVwGDFTBDlPENaM2btLmw= 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:109398 Archived-At: Eric Abrahamsen writes: > But the fact is that pcase is (very complex and very useful) syntax > sugar. I just wrote a pcase clause that looks like: > > `((,(and f-string (pred stringp)) . ,(and class (pred symbolp))) > . ,(and regexp (pred stringp))) > > And that's kind of awful. The whole point of pcase should be concision, > but that looks pretty terrible. :-P Maybe separate the testing and the binding operations, like: #+begin_src emacs-lisp (and `((,(pred stringp) . ,(pred symbolp)) . ,(pred stringp)) `((,f-string . ,class ) . ,regexp)) #+end_src Regards, Michael.