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: How to exit out of a function ? what is try-catch-throw in terms of Program Counter Date: Tue, 23 Oct 2007 21:06:00 -0400 Message-ID: References: <1192913158.922454.108100@k35g2000prh.googlegroups.com> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: ger.gmane.org 1193190148 12304 80.91.229.12 (24 Oct 2007 01:42:28 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 24 Oct 2007 01:42:28 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Wed Oct 24 03:42:29 2007 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.50) id 1IkVGO-0002fL-O2 for geh-help-gnu-emacs@m.gmane.org; Wed, 24 Oct 2007 03:42:29 +0200 Original-Received: from localhost ([127.0.0.1] helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1IkVGG-00052A-BB for geh-help-gnu-emacs@m.gmane.org; Tue, 23 Oct 2007 21:42:20 -0400 Original-Path: shelby.stanford.edu!newsfeed.stanford.edu!postnews.google.com!news1.google.com!border1.nntp.dca.giganews.com!nntp.giganews.com!local01.nntp.dca.giganews.com!nntp.umontreal.ca!news.umontreal.ca.POSTED!not-for-mail Original-NNTP-Posting-Date: Tue, 23 Oct 2007 20:06:05 -0500 Original-Newsgroups: gnu.emacs.help,comp.lang.c,comp.lang.c++ User-Agent: Gnus/5.11 (Gnus v5.11) Emacs/23.0.50 (gnu/linux) Cancel-Lock: sha1:3OBJB4H9DD2paQRdhf7mPZ+xkQQ= Original-Lines: 15 X-Usenet-Provider: http://www.giganews.com Original-NNTP-Posting-Host: 132.204.27.213 Original-X-Trace: sv3-WmjYCalZVJ3kw0uMopOclu/CgP9VqrQ20EzFB4gldHvfnHzrEXZjdkdjLj46kJPL4aef1yPoUrBzp71!2E/BS0k/ID4Jm5VGEDPESioaqHr+GFw3x4f4xfMw5V4CZ5UVuORNeY4f5fVdy8yIUq9lHI92Y5an!WsJ2WdhV0Uo9UQXOVQ== Original-X-Complaints-To: abuse@umontreal.ca X-DMCA-Complaints-To: abuse@umontreal.ca X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint properly X-Postfilter: 1.3.35 Original-Xref: shelby.stanford.edu gnu.emacs.help:153259 comp.lang.c:828409 comp.lang.c++:954515 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:48747 Archived-At: >>> NOTE: I am really afraid of try-catch-throw. I have never been >>> able to understand it since it does not exist in C and I can't >>> really visualize the construct in terms of C. That is what my >> >> Actually, these constructs pretty much exist in C as well: `catch' is >> called `setjmp', and `throw' is called `longjmp'. > I believe a better way would be to imagine that 'try', not 'catch', > is called 'setjmp'. Sorry, I'm reading this on gnu.emacs.help where Elisp only provides `catch' and `throw' (no `try') and these map pretty closely to setjmp/longjmp. Stefan