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: The poor state of documentation of pcase like things. Date: Sat, 26 Dec 2015 18:10:23 +0100 Message-ID: <877fk1nnk0.fsf@web.de> References: <20151216202605.GA3752@acm.fritz.box> <87io3m60bq.fsf@web.de> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1451149867 32418 80.91.229.3 (26 Dec 2015 17:11:07 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sat, 26 Dec 2015 17:11:07 +0000 (UTC) To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Sat Dec 26 18:10:53 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 1aCsMm-0005rF-DZ for ged-emacs-devel@m.gmane.org; Sat, 26 Dec 2015 18:10:52 +0100 Original-Received: from localhost ([::1]:39335 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aCsMl-0002un-Qr for ged-emacs-devel@m.gmane.org; Sat, 26 Dec 2015 12:10:51 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:53442) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aCsMY-0002uZ-DS for emacs-devel@gnu.org; Sat, 26 Dec 2015 12:10:39 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aCsMV-0004MB-6G for emacs-devel@gnu.org; Sat, 26 Dec 2015 12:10:38 -0500 Original-Received: from plane.gmane.org ([80.91.229.3]:59260) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aCsMU-0004M6-VN for emacs-devel@gnu.org; Sat, 26 Dec 2015 12:10:35 -0500 Original-Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1aCsMS-0005Ok-MG for emacs-devel@gnu.org; Sat, 26 Dec 2015 18:10:32 +0100 Original-Received: from ip-90-186-2-151.web.vodafone.de ([90.186.2.151]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sat, 26 Dec 2015 18:10:32 +0100 Original-Received: from michael_heerdegen by ip-90-186-2-151.web.vodafone.de with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sat, 26 Dec 2015 18:10:32 +0100 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 24 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: ip-90-186-2-151.web.vodafone.de User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.0.50 (gnu/linux) Cancel-Lock: sha1:Pl9NtSRyhEwYApgyzhxtW558dTU= 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:196897 Archived-At: Richard Stallman writes: > I am not convinced, but I won't argue about it. I'm open to improvement suggestions, as long as they keep the thing consistent. We could try to define a new pattern offering destructuring looking less "unusual" (though we already have `seq' provided by seq.el which has very simple semantics). OTOH I think ` is already quite optimal for the set of features it offers. For the _ pattern, I guess we could reinvent it's meaning in pcase in general. But I don't see how the resulting semantics could be made equally simple as it is currently. Just changing what _ does in pcase's ` to save a comma would IMHO be what we call in German "verschlimmbessern" (my dictionary says you can translate that into "disimprove"). Regards, Michael.