From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.help Subject: Re: About `catch' and `throw' Date: Sat, 22 Dec 2012 12:50:12 -0500 Message-ID: References: <20121221200001.891d30e881f25580089bbc5b@gmail.com> <6EB1418B063C4F8CAFA179007459A7A5@us.oracle.com> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1356198911 22537 80.91.229.3 (22 Dec 2012 17:55:11 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sat, 22 Dec 2012 17:55:11 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Sat Dec 22 18:55:26 2012 Return-path: Envelope-to: geh-help-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 1TmTID-0006jf-7x for geh-help-gnu-emacs@m.gmane.org; Sat, 22 Dec 2012 18:55:25 +0100 Original-Received: from localhost ([::1]:54936 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TmTHz-0005mg-FI for geh-help-gnu-emacs@m.gmane.org; Sat, 22 Dec 2012 12:55:11 -0500 Original-Received: from eggs.gnu.org ([208.118.235.92]:33116) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TmTHm-0005ef-Rh for help-gnu-emacs@gnu.org; Sat, 22 Dec 2012 12:55:04 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TmTHg-0008DT-Fm for help-gnu-emacs@gnu.org; Sat, 22 Dec 2012 12:54:58 -0500 Original-Received: from plane.gmane.org ([80.91.229.3]:41593) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TmTHg-0008Bs-9X for help-gnu-emacs@gnu.org; Sat, 22 Dec 2012 12:54:52 -0500 Original-Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1TmTHs-0006Pb-6F for help-gnu-emacs@gnu.org; Sat, 22 Dec 2012 18:55:04 +0100 Original-Received: from 69-196-176-227.dsl.teksavvy.com ([69.196.176.227]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sat, 22 Dec 2012 18:55:04 +0100 Original-Received: from monnier by 69-196-176-227.dsl.teksavvy.com with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sat, 22 Dec 2012 18:55:04 +0100 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 22 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: 69-196-176-227.dsl.teksavvy.com User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (gnu/linux) Cancel-Lock: sha1:iKXzFbpdSGDjY8QVz2pVfK9Hgvk= X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 80.91.229.3 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:88292 Archived-At: > During the evaluation of code that is lexically inside the `catch', > a `throw' that is evaluated throws back to that `catch'. Usually, but not always. > And if there is more than one `catch' with the same label then it > throws to the one that is lexically nearest (i.e., innermost, outside > the `throw'), which is also the most recent. Usually, but not always: (catch 'foo (let ((f (lambda () (throw 'foo)))) ... (catch 'foo (funcall f)) ...)) will throw to the inner catch, not the outer one. Stefan