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: Sun, 25 Oct 2015 01:11:15 +0200 Message-ID: <87mvv79818.fsf@web.de> References: <871tcngdv2.fsf@gmail.com> <87k2qe1u09.fsf@web.de> <83r3kmrtat.fsf@gnu.org> <87r3kl22zk.fsf@web.de> <837fmdzpf2.fsf@gnu.org> <87oafp659p.fsf@web.de> <831tclzly9.fsf@gnu.org> <87fv115t20.fsf@web.de> <20151024090146.GA1849@acm.fritz.box> <4f8ca905-8222-48d5-b7a2-21c0ee40bfb5@default> <20151024172258.GA2731@acm.fritz.box> <87mvv8aval.fsf@gnu.org> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Trace: ger.gmane.org 1445728315 31941 80.91.229.3 (24 Oct 2015 23:11:55 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sat, 24 Oct 2015 23:11:55 +0000 (UTC) To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Sun Oct 25 01:11:46 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 1Zq7yT-0007nD-L5 for ged-emacs-devel@m.gmane.org; Sun, 25 Oct 2015 01:11:45 +0200 Original-Received: from localhost ([::1]:45937 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Zq7yS-0000z2-V3 for ged-emacs-devel@m.gmane.org; Sat, 24 Oct 2015 19:11:44 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:35379) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Zq7yG-0000yv-M0 for emacs-devel@gnu.org; Sat, 24 Oct 2015 19:11:33 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Zq7yD-00010E-EI for emacs-devel@gnu.org; Sat, 24 Oct 2015 19:11:32 -0400 Original-Received: from plane.gmane.org ([80.91.229.3]:56741) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Zq7yD-000108-6z for emacs-devel@gnu.org; Sat, 24 Oct 2015 19:11:29 -0400 Original-Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1Zq7yA-0007SK-2m for emacs-devel@gnu.org; Sun, 25 Oct 2015 01:11:26 +0200 Original-Received: from ip-90-186-1-67.web.vodafone.de ([90.186.1.67]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sun, 25 Oct 2015 01:11:26 +0200 Original-Received: from michael_heerdegen by ip-90-186-1-67.web.vodafone.de with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sun, 25 Oct 2015 01:11:26 +0200 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 26 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: ip-90-186-1-67.web.vodafone.de User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.0.50 (gnu/linux) Cancel-Lock: sha1:Z4qYF6F2VSyHhKuvOHy6wP2XjDQ= 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:192593 Archived-At: Johan Bockgård writes: > But a "form" is a Lisp _expression_ that you can evaluate. So (pred > ...) is not a form (it is special syntax that is only meaningful > inside pcase). FWIW the Lisp manual is not very clear whether this is (not) a form. Is the evaluation expected to produce a result (or is it allowed to raise an error)? I guess the only answer that makes sense is "no". Anyway, "form" has a second, different meaning. It is used for that second meaning all over Emacs documentation, e.g. (just a random example) ,---------------------------------------------------------------------- | defface is a Lisp macro in ‘custom.el’. | | SPEC should be a "face spec", i.e., an alist of the form | | ((DISPLAY . ATTS)...) `---------------------------------------------------------------------- Regards, Michael.