From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Artur Malabarba Newsgroups: gmane.emacs.devel Subject: Re: [Emacs-diffs] master 1758951: lisp/let-alist.el (let-alist): Evaluate `alist' only once. Date: Fri, 19 Dec 2014 10:59:11 -0200 Message-ID: References: <20141218203409.5403.91769@vcs.savannah.gnu.org> Reply-To: bruce.connor.am@gmail.com NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-Trace: ger.gmane.org 1418993965 8905 80.91.229.3 (19 Dec 2014 12:59:25 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 19 Dec 2014 12:59:25 +0000 (UTC) Cc: emacs-devel To: Stefan Monnier Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Fri Dec 19 13:59:18 2014 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 1Y1x9J-0008PU-T1 for ged-emacs-devel@m.gmane.org; Fri, 19 Dec 2014 13:59:18 +0100 Original-Received: from localhost ([::1]:58198 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Y1x9J-0007hT-B6 for ged-emacs-devel@m.gmane.org; Fri, 19 Dec 2014 07:59:17 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:47588) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Y1x9F-0007gd-MI for emacs-devel@gnu.org; Fri, 19 Dec 2014 07:59:14 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Y1x9E-0000Ej-O4 for emacs-devel@gnu.org; Fri, 19 Dec 2014 07:59:13 -0500 Original-Received: from mail-ob0-x234.google.com ([2607:f8b0:4003:c01::234]:39692) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Y1x9E-0000EY-Id for emacs-devel@gnu.org; Fri, 19 Dec 2014 07:59:12 -0500 Original-Received: by mail-ob0-f180.google.com with SMTP id wp4so12274802obc.11 for ; Fri, 19 Dec 2014 04:59:12 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:reply-to:sender:in-reply-to:references:date:message-id :subject:from:to:cc:content-type; bh=oTOom23O/wQt54Ey3zL8Z1G3CpxgxVj1WAfuh6Gp690=; b=XglYGD+aRQ3x3NIWymRjgvw0ApNfdQ3jJSfb+oCDNb9lNUrNxbS2DcjV0lQ0jkdTuc wlilwAoMs6QnKT9hLYQQl4bPnNY2U7MogK/8gg4A8yeAu2j2g4vX0/c9JC5SfAbZcnPc GdQmXyiItijrDRD3OjJFSrlgoUEEODBdgKhxF8rUKLbnzjL1+z/cfZ8kqSbQ+P0/89bH 6kxasqiDAQtz5v2lO2h3UDVEBF5nqWwv6n0r1x9wmsVZPWQpOTKclumJRnYYeuxsKo7p X/ata7jR/E4vCmvmUUNnW6ykFB+y+NNVdoioVzr1QS9lgKJ9yS4Q1Qz4PQXytruQXNDZ TQXg== X-Received: by 10.182.210.232 with SMTP id mx8mr4740691obc.46.1418993951970; Fri, 19 Dec 2014 04:59:11 -0800 (PST) Original-Received: by 10.76.26.162 with HTTP; Fri, 19 Dec 2014 04:59:11 -0800 (PST) In-Reply-To: X-Google-Sender-Auth: ve-erLM9e0IpZZYWY5zxDC2dqV0 X-detected-operating-system: by eggs.gnu.org: Error: Malformed IPv6 address (bad octet value). X-Received-From: 2607:f8b0:4003:c01::234 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:180328 Archived-At: Thanks, I didn't about that. Unfortunately, it seems to not be available on 24.2 or earlier. (at least, I couldn't find it) I want to develop this version in parallel with the Elpa version for now, while there are still a couple of features I'm planning to add. But I'll add it in later (before release). 2014-12-19 2:33 GMT-02:00 Stefan Monnier : >> + (let ((var (gensym "let-alist"))) >> + `(let ((,var ,alist) > > You can use `macroexp-let2' for that (with the extra benefit that it > will skip the `let' if `alist' is already a trivial expression such as > a simple variable). > > > Stefan