From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.bugs Subject: bug#16567: 24.3.50; pcase should signal an error if no case matches Date: Mon, 08 Sep 2014 20:41:01 -0400 Message-ID: References: NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1410223349 7927 80.91.229.3 (9 Sep 2014 00:42:29 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 9 Sep 2014 00:42:29 +0000 (UTC) Cc: 16567@debbugs.gnu.org To: Helmut Eller Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Tue Sep 09 02:42:22 2014 Return-path: Envelope-to: geb-bug-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 1XR9Vk-00063q-LR for geb-bug-gnu-emacs@m.gmane.org; Tue, 09 Sep 2014 02:42:20 +0200 Original-Received: from localhost ([::1]:46385 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XR9Vk-0005sS-A6 for geb-bug-gnu-emacs@m.gmane.org; Mon, 08 Sep 2014 20:42:20 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:44056) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XR9VZ-0005rW-Tq for bug-gnu-emacs@gnu.org; Mon, 08 Sep 2014 20:42:17 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XR9VS-0005vi-D2 for bug-gnu-emacs@gnu.org; Mon, 08 Sep 2014 20:42:09 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:42682) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XR9VS-0005vd-9f for bug-gnu-emacs@gnu.org; Mon, 08 Sep 2014 20:42:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1XR9VR-0006h7-Mu for bug-gnu-emacs@gnu.org; Mon, 08 Sep 2014 20:42:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Stefan Monnier Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Tue, 09 Sep 2014 00:42:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 16567 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 16567-submit@debbugs.gnu.org id=B16567.141022327025666 (code B ref 16567); Tue, 09 Sep 2014 00:42:01 +0000 Original-Received: (at 16567) by debbugs.gnu.org; 9 Sep 2014 00:41:10 +0000 Original-Received: from localhost ([127.0.0.1]:34244 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1XR9Ub-0006ft-Qa for submit@debbugs.gnu.org; Mon, 08 Sep 2014 20:41:10 -0400 Original-Received: from ironport2-out.teksavvy.com ([206.248.154.181]:7524) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1XR9UZ-0006ff-Eb for 16567@debbugs.gnu.org; Mon, 08 Sep 2014 20:41:08 -0400 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: ArYGAIDvNVNFpZEG/2dsb2JhbABZgwaDSr0vgw6BFxd0giUBAQEBAgFWIwULCzQSFBgNJIgECNIZF456B4Q4BKkZgWqDTCE X-IPAS-Result: ArYGAIDvNVNFpZEG/2dsb2JhbABZgwaDSr0vgw6BFxd0giUBAQEBAgFWIwULCzQSFBgNJIgECNIZF456B4Q4BKkZgWqDTCE X-IronPort-AV: E=Sophos;i="4.97,753,1389762000"; d="scan'208";a="89177361" Original-Received: from 69-165-145-6.dsl.teksavvy.com (HELO ceviche.home) ([69.165.145.6]) by ironport2-out.teksavvy.com with ESMTP/TLS/DHE-RSA-AES256-SHA; 08 Sep 2014 20:41:01 -0400 Original-Received: by ceviche.home (Postfix, from userid 20848) id B7ABF660C4; Mon, 8 Sep 2014 20:41:01 -0400 (EDT) In-Reply-To: (Helmut Eller's message of "Mon, 08 Sep 2014 22:58:05 +0200") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.4.50 (gnu/linux) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 140.186.70.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:93169 Archived-At: > What could happen if you would change it? Obviously: errors signaled instead of returning the expected nil. Returning nil by default is "the norm" in Elisp (think of missing `else' branches in `if', or missing default case in `cond' or even missing default case in `cl-case'), so it's to be expected that pcase users would rely on this default behavior as well, even if it strikes you as utter nonsense. > The "nil default" would make more sense in a pcase-if or pif macro. Changing the default of `pcase' is not an option at this point. Stefan