From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Eric Abrahamsen Newsgroups: gmane.emacs.help Subject: Re: Quick pcase question Date: Wed, 02 Mar 2016 19:18:54 +0800 Message-ID: <87ziuh3z6p.fsf@ericabrahamsen.net> References: <87lh615gt8.fsf@ericabrahamsen.net> <87mvqhw3a4.fsf@web.de> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1456917592 10493 80.91.229.3 (2 Mar 2016 11:19:52 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 2 Mar 2016 11:19:52 +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 12:19:44 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 1ab4of-0004OG-1Z for geh-help-gnu-emacs@m.gmane.org; Wed, 02 Mar 2016 12:19:41 +0100 Original-Received: from localhost ([::1]:55679 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ab4oe-0003gd-AH for geh-help-gnu-emacs@m.gmane.org; Wed, 02 Mar 2016 06:19:40 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:38184) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ab4oR-0003fb-O8 for help-gnu-emacs@gnu.org; Wed, 02 Mar 2016 06:19:28 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ab4oN-0007PZ-FN for help-gnu-emacs@gnu.org; Wed, 02 Mar 2016 06:19:27 -0500 Original-Received: from plane.gmane.org ([80.91.229.3]:38076) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ab4oN-0007PT-8J for help-gnu-emacs@gnu.org; Wed, 02 Mar 2016 06:19:23 -0500 Original-Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1ab4oH-0004AF-Vd for help-gnu-emacs@gnu.org; Wed, 02 Mar 2016 12:19:20 +0100 Original-Received: from 123.123.22.37 ([123.123.22.37]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 02 Mar 2016 12:19:17 +0100 Original-Received: from eric by 123.123.22.37 with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 02 Mar 2016 12:19:17 +0100 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 25 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: 123.123.22.37 User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.1.50 (gnu/linux) Cancel-Lock: sha1:AQ+jyGES4IfsnlBjnTmjrfeLin4= 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:109395 Archived-At: Michael Heerdegen writes: > Eric Abrahamsen writes: > >> (pcase tst >> (`(symbolla . ,(and x (pred stringp))) >> (message "cdr is a string: %s" x))) >> >> Is the ",(and x (pred stringp))" part really the simplest way of doing >> that? > > Yes, I think so. > > How could it be much simpler (there is not much redundancy in that > expression)? It's not so much the simplicity, I guess, as the intuitiveness -- "(and x" looks like a test to me, not an assignment. My brain would prefer: (,x (pred stringp)) But there's no reason to listen to my brain :) Thanks, Eric