From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Juanma Barranquero Newsgroups: gmane.emacs.devel Subject: Re: Lexical binding Date: Sun, 3 Apr 2011 14:26:33 +0200 Message-ID: References: <4D98629F.9070506@gnu.org> 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 1301833686 6604 80.91.229.12 (3 Apr 2011 12:28:06 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Sun, 3 Apr 2011 12:28:06 +0000 (UTC) Cc: Stefan Monnier , emacs-devel@gnu.org To: Christian Ohler Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Sun Apr 03 14:27:58 2011 Return-path: Envelope-to: ged-emacs-devel@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 1Q6MPE-0001w8-CZ for ged-emacs-devel@m.gmane.org; Sun, 03 Apr 2011 14:27:57 +0200 Original-Received: from localhost ([127.0.0.1]:59463 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1Q6MP3-0008SV-9q for ged-emacs-devel@m.gmane.org; Sun, 03 Apr 2011 08:27:37 -0400 Original-Received: from [140.186.70.92] (port=36328 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1Q6MOr-0008KX-12 for emacs-devel@gnu.org; Sun, 03 Apr 2011 08:27:32 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Q6MOl-0000Ze-2c for emacs-devel@gnu.org; Sun, 03 Apr 2011 08:27:23 -0400 Original-Received: from mail-gy0-f169.google.com ([209.85.160.169]:55053) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Q6MOf-0000Yo-T4; Sun, 03 Apr 2011 08:27:13 -0400 Original-Received: by gyd8 with SMTP id 8so2348317gyd.0 for ; Sun, 03 Apr 2011 05:27:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc:content-type:content-transfer-encoding; bh=Iuc5xnYkv3NmpARIK6IZ5acdxi6zFX4U/zTytgmcs9U=; b=n7Qh/IUaYzRBjz3y1GerO/HXxDf5BdsaH14+8AkXIewxnpZ9gp93/YcL5R4sBJ1GlY Tr5HB8YKFOxjXp67npdeffcct9jEJuU8Jr2UTpxoocqnIjELq67uvu8GRQ0lCA4WqMeX PU0YCk+xiri/DRBdgyP1H4LtMP/p7Eb1VBRH0= 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=VOzbDrllKe3+BTPcOqG43SKULF6Ay/5LnQJWUUTJJzfNNkHaE5j8M3SUul2QVvMIzi qvBaViyX1fheIgLoWN0n2RmfGYH5K32H+Bb8WKPfi1L1TcMfMMWZMfhLTQfTuQMQ4UoU lif0pjMGK1cZVkIJyu7s54Ux0xtJ568/iCBpM= Original-Received: by 10.236.28.129 with SMTP id g1mr312670yha.84.1301833633073; Sun, 03 Apr 2011 05:27:13 -0700 (PDT) Original-Received: by 10.147.182.17 with HTTP; Sun, 3 Apr 2011 05:26:33 -0700 (PDT) In-Reply-To: <4D98629F.9070506@gnu.org> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 2) X-Received-From: 209.85.160.169 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:138086 Archived-At: On Sun, Apr 3, 2011 at 14:05, Christian Ohler wrote: > In loop destructuring, you can use nil for fields that you want to ignore= : > > =C2=A0 =C2=A0 (loop for (nil width . nil) in bs-attributes-list > =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 if (numberp width) sum width) Yes, but it is less informative. > If you want to keep the ignored fields named, you could do something like > > =C2=A0 =C2=A0 (loop for (name width . rest) in bs-attributes-list > =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 do (progn name rest) ; ignore > =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 if (numberp width) sum width) And this is just ugly. Anyway, the point is that (elisp)11.9.5.1 "Converting a package to use lexical scoping" says: To silence byte-compiler warnings about unused variables, just use a variable name that start with an underscore, which the byte-compiler interpret as an indication that this is a variable known not to be used. but this exception is quite less useful if assignments produce the "variable `_x' not left unused" warning. Thanks, =C2=A0 =C2=A0 Juanma