From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Juanma Barranquero Newsgroups: gmane.emacs.bugs Subject: bug#6878: bool-vectors of length 0 signal error when aref/aset the 0th element Date: Fri, 20 Aug 2010 04:23:52 +0200 Message-ID: References: <87r5hutw2q.fsf@stupidchicken.com> <87fwyauqwy.fsf@stupidchicken.com> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Trace: dough.gmane.org 1282271954 13760 80.91.229.12 (20 Aug 2010 02:39:14 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Fri, 20 Aug 2010 02:39:14 +0000 (UTC) Cc: Chong Yidong , Andreas Schwab , 6878@debbugs.gnu.org To: MON KEY Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Fri Aug 20 04:39:12 2010 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1OmHVe-0002kl-K2 for geb-bug-gnu-emacs@m.gmane.org; Fri, 20 Aug 2010 04:39:10 +0200 Original-Received: from localhost ([127.0.0.1]:50911 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1OmHVe-0004IQ-4R for geb-bug-gnu-emacs@m.gmane.org; Thu, 19 Aug 2010 22:39:10 -0400 Original-Received: from [140.186.70.92] (port=55691 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1OmHVX-0004IL-0p for bug-gnu-emacs@gnu.org; Thu, 19 Aug 2010 22:39:04 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1OmHVV-0008H9-JG for bug-gnu-emacs@gnu.org; Thu, 19 Aug 2010 22:39:02 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:43981) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1OmHVV-0008H5-He for bug-gnu-emacs@gnu.org; Thu, 19 Aug 2010 22:39:01 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.69) (envelope-from ) id 1OmHH0-0004kM-3m; Thu, 19 Aug 2010 22:24:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Juanma Barranquero Original-Sender: debbugs-submit-bounces@debbugs.gnu.org Resent-To: owner@debbugs.gnu.org Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Fri, 20 Aug 2010 02:24:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 6878 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 6878-submit@debbugs.gnu.org id=B6878.128227098918237 (code B ref 6878); Fri, 20 Aug 2010 02:24:02 +0000 Original-Received: (at 6878) by debbugs.gnu.org; 20 Aug 2010 02:23:09 +0000 Original-Received: from localhost ([127.0.0.1] helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1OmHG8-0004k6-P7 for submit@debbugs.gnu.org; Thu, 19 Aug 2010 22:23:08 -0400 Original-Received: from mail-iw0-f172.google.com ([209.85.214.172]) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1OmHG7-0004jo-CY for 6878@debbugs.gnu.org; Thu, 19 Aug 2010 22:23:08 -0400 Original-Received: by iwn3 with SMTP id 3so2300783iwn.3 for <6878@debbugs.gnu.org>; Thu, 19 Aug 2010 19:24:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:mime-version:received:in-reply-to :references:from:date:message-id:subject:to:cc:content-type :content-transfer-encoding; bh=2+d5MOCAw0iM2XfwYb7sDAT2Fkknq/YHQFofoefJVEc=; b=nfQtL0i87hBjZtCCUKaClxibEh3ll0Dn+nVxvvHOtvkTho4P06VbXQGtZePRotDeYZ ku8nG3PSDK/cQpus3ZBvXfrwZzcBJ88xbyV1umsI9AjsQVGSMBs4S6vMxdKItlr+umdm ntv69ba6ZcQ22jYF0vvJmwKn7gR8h5hJU3beM= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc:content-type:content-transfer-encoding; b=tJUy+qqgnBLABy0JiY4E0pr5OPrR1bW6EG+RymLt5XliT16nNnXH7sRHke2MBA9jC+ s+lF1kPKF36d3b+GLOv9D7yjOfbNieFErpORL+eyrnzS4+LTKdf18SHsNPqf0bwcDA1l xcWyn88fi0Koh+W4kGj4EaouVTEJO2vR55in4= Original-Received: by 10.231.39.195 with SMTP id h3mr820106ibe.88.1282271052268; Thu, 19 Aug 2010 19:24:12 -0700 (PDT) Original-Received: by 10.231.151.132 with HTTP; Thu, 19 Aug 2010 19:23:52 -0700 (PDT) In-Reply-To: X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.11 Precedence: list Resent-Date: Thu, 19 Aug 2010 22:24:02 -0400 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 3) 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: , Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:39655 Archived-At: On Fri, Aug 20, 2010 at 04:01, MON KEY wrote: > Emacs lisp doesn't and I can think of no good reasons to create 0 > length bool-vectors. > > Can any one else? Of course. Eliminating special cases, for example. (defun split-vec (v p) (list (substring v 0 p) (substring v p (length v)))) and you can do (apply 'vconcat (split-vec V N)) for N in -length(V)..length(V) and get back V =C2=A0 =C2=A0 Juanma