From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Thorsten Jolitz Newsgroups: gmane.emacs.help Subject: How to exit function from inside its `interactive' call? Date: Wed, 06 Aug 2014 21:38:31 +0200 Message-ID: <878un1s91k.fsf@gmail.com> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1407353961 8882 80.91.229.3 (6 Aug 2014 19:39:21 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 6 Aug 2014 19:39:21 +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 Aug 06 21:39:14 2014 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 1XF73I-0004ix-9n for geh-help-gnu-emacs@m.gmane.org; Wed, 06 Aug 2014 21:39:12 +0200 Original-Received: from localhost ([::1]:40698 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XF73H-0002B7-RI for geh-help-gnu-emacs@m.gmane.org; Wed, 06 Aug 2014 15:39:11 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:50420) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XF72z-0002A6-AJ for help-gnu-emacs@gnu.org; Wed, 06 Aug 2014 15:39:00 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XF72r-0008QD-NB for help-gnu-emacs@gnu.org; Wed, 06 Aug 2014 15:38:53 -0400 Original-Received: from plane.gmane.org ([80.91.229.3]:43114) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XF72r-0008ON-Fm for help-gnu-emacs@gnu.org; Wed, 06 Aug 2014 15:38:45 -0400 Original-Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1XF72p-00042A-GT for help-gnu-emacs@gnu.org; Wed, 06 Aug 2014 21:38:43 +0200 Original-Received: from e178063155.adsl.alicedsl.de ([85.178.63.155]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 06 Aug 2014 21:38:43 +0200 Original-Received: from tjolitz by e178063155.adsl.alicedsl.de with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 06 Aug 2014 21:38:43 +0200 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 42 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: e178063155.adsl.alicedsl.de User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) Cancel-Lock: sha1:56i+OvoTkvLA5Aom0pWCqeCoDoI= 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:99102 Archived-At: Hi List, how can I use catch/throw (or whatever) to exit function foo from inside its 'interactive call? All combinations I tried so far only exit 'interactive and still execute the function body. #+begin_src emacs-lisp (defun foo (&optional arg) (catch 'exit (interactive (let ((bar (if current-prefix-arg (prefix-numeric-value) (throw 'exit nil)))) (list (+ 2 bar))))) (message "Arg: %s" arg)) #+end_src #+results: : Arg: nil #+begin_src emacs-lisp (foo) #+end_src #+results: : Arg: nil #+begin_src emacs-lisp (foo '(4)) #+end_src #+results: : Arg: (4) Thanks for any hint. -- cheers, Thorsten