From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Jambunathan K Newsgroups: gmane.emacs.bugs Subject: bug#13126: 24.3.50; (WISH) Document pcase in Info manual Date: Tue, 11 Dec 2012 15:50:42 +0530 Message-ID: <87txrslwjp.fsf@gmail.com> References: <87fw3fpoa6.fsf@gmail.com> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1355221114 3331 80.91.229.3 (11 Dec 2012 10:18:34 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 11 Dec 2012 10:18:34 +0000 (UTC) Cc: 13126@debbugs.gnu.org To: Stefan Monnier Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Tue Dec 11 11:18:47 2012 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 1TiMvH-0002AD-H3 for geb-bug-gnu-emacs@m.gmane.org; Tue, 11 Dec 2012 11:18:47 +0100 Original-Received: from localhost ([::1]:41803 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TiMv4-0006Bh-SU for geb-bug-gnu-emacs@m.gmane.org; Tue, 11 Dec 2012 05:18:34 -0500 Original-Received: from eggs.gnu.org ([208.118.235.92]:51543) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TiMuw-0006BE-St for bug-gnu-emacs@gnu.org; Tue, 11 Dec 2012 05:18:32 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TiMus-0004lp-NH for bug-gnu-emacs@gnu.org; Tue, 11 Dec 2012 05:18:26 -0500 Original-Received: from debbugs.gnu.org ([140.186.70.43]:54423) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TiMus-0004l2-In for bug-gnu-emacs@gnu.org; Tue, 11 Dec 2012 05:18:22 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.72) (envelope-from ) id 1TiMvW-0001oB-FG for bug-gnu-emacs@gnu.org; Tue, 11 Dec 2012 05:19:02 -0500 X-Loop: help-debbugs@gnu.org In-Reply-To: <87fw3fpoa6.fsf@gmail.com> Resent-From: Jambunathan K Original-Sender: debbugs-submit-bounces@debbugs.gnu.org Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Tue, 11 Dec 2012 10:19:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 13126 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 13126-submit@debbugs.gnu.org id=B13126.13552211016901 (code B ref 13126); Tue, 11 Dec 2012 10:19:02 +0000 Original-Received: (at 13126) by debbugs.gnu.org; 11 Dec 2012 10:18:21 +0000 Original-Received: from localhost ([127.0.0.1]:36441 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.72) (envelope-from ) id 1TiMur-0001nG-8e for submit@debbugs.gnu.org; Tue, 11 Dec 2012 05:18:21 -0500 Original-Received: from mail-pa0-f44.google.com ([209.85.220.44]:57352) by debbugs.gnu.org with esmtp (Exim 4.72) (envelope-from ) id 1TiMun-0001n7-I5 for 13126@debbugs.gnu.org; Tue, 11 Dec 2012 05:18:19 -0500 Original-Received: by mail-pa0-f44.google.com with SMTP id hz11so2718422pad.3 for <13126@debbugs.gnu.org>; Tue, 11 Dec 2012 02:17:36 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:references:date:message-id:user-agent :mime-version:content-type; bh=t3UZKRUFDlN/iTikhjZ28R3KjFX3krzHuqLV1YiV2cw=; b=N08Ld+0ooBalgxAXEoU+a0xMxKXy2Ol2cveVz1U58sXDi8fjrHbJo5O2I6IJnG3IFy OZMvLqWREty29P6FHBlJCS3ReLduvN91jiUDH+qc5kCbgLv6LCmzAdTRti98ihEE0goP 6M+38ACqhDTEuCDoyLO3B/8wtNpSRZ0N4KsI4zFqxEnJa1gHyNwCpiVYdFfjKTb9QSmd 0C80pZMhM9NoW3YVNPMOBLXsfsaA04K4yZzZxEYH18mhj2rMwUiaJQVFaCbJPd+fpG49 hh2EXifM+ktYK3taODJeVREHVLBq03rG5W37d99OgWJq0Rf6+yag6QFkj/VFmimtpg8m 6r/g== Original-Received: by 10.68.241.232 with SMTP id wl8mr46738188pbc.144.1355221056605; Tue, 11 Dec 2012 02:17:36 -0800 (PST) Original-Received: from debian-6.05 ([101.62.98.148]) by mx.google.com with ESMTPS id l5sm13651406paz.14.2012.12.11.02.17.33 (version=TLSv1/SSLv3 cipher=OTHER); Tue, 11 Dec 2012 02:17:35 -0800 (PST) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (gnu/linux) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.13 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.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:68307 Archived-At: >> 24.3.50; Document pcase in Info manual > > I just installed a doc for it in the `emacs-24' branch. Please take > a look at it, Thanks. `pcase' seemed a good replacement for `case'. Quick feedback. 1. pcase-let, pcase-let*, pcase-dolist (maybe) 2. It took some effort to understand that there is a U-PATTERN and a UPATTERN. We don't read out `*-*', do we? ,---- | There are two kinds of patterns involved in `pcase', called | _U-patterns_ and _Q-patterns_. The UPATTERN mentioned above are | U-patterns and can take the following forms: `---- 3. Let's take the example of how ,---- | (defun evaluate (exp env) | (pcase exp | ,---- | | (`(add ,x ,y) (+ (evaluate x env) (evaluate y env))) | `---- | (`(call ,fun ,arg) (funcall (evaluate fun) (evaluate arg env))) | (`(fn ,arg ,body) (lambda (val) | (evaluate body (cons (cons arg val) env)))) | ((pred numberp) exp) | ((pred symbolp) (cdr (assq exp env))) | (_ (error "Unknown expression %S" exp)))) `---- `(add ,x ,y) ` QPATTERN