From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 22094 invoked by alias); 19 Dec 2004 19:43:33 -0000 Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm Precedence: bulk List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Received: (qmail 22053 invoked from network); 19 Dec 2004 19:43:25 -0000 Received: from unknown (HELO mail.prospeed.net) (12.46.111.140) by sourceware.org with SMTP; 19 Dec 2004 19:43:25 -0000 Received: from enterprise-e.cygwin.com (lhall.prospeed.net [12.46.110.44] (may be forged)) by mail.prospeed.net (8.13.0/8.13.0) with ESMTP id iBJJhOGF005606; Sun, 19 Dec 2004 14:43:24 -0500 Reply-To: Cygwin List Message-Id: <6.2.0.14.0.20041219143737.04a82e30@pop.prospeed.net> Date: Sun, 19 Dec 2004 19:43:00 -0000 To: Mikael =?iso-8859-1?Q?=C5sberg?= , From: Larry Hall Subject: Re: Where did the output go and question regarding return values of getopt_long() In-Reply-To: <006d01c4e5dd$7e4bda90$0200a8c0@mindcooler> References: <006d01c4e5dd$7e4bda90$0200a8c0@mindcooler> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-SW-Source: 2004-12/txt/msg00679.txt.bz2 At 10:14 AM 12/19/2004, you wrote: >Hello, consider this c++-function: > >void >handle_command_line(int argc, > char* const argv[], > bool& verbose, > vector& numbers) >{ > const int id_numbers = 4711; > const int id_verbose = 4712; > const int id_help = 4713; > > const option long_options[] = > { > {"numbers", 1, NULL, id_numbers}, > {"verbose", 0, NULL, id_verbose}, > {"help", 0, NULL, id_help}, > {NULL, 0, NULL, 0} > }; > > const char* const short_options = ""; > > int c = 0; > > while((c = getopt_long( > argc, > argv, > short_options, > long_options, > NULL)) != -1) > { > switch(c) > { > cout << "c = " << c << endl; /* Never shown on screen... */ > > case id_numbers: > { > cout << "Calling extract_numbers() with " << optarg << endl; > > extract_numbers(optarg, numbers); > > break; > } > case id_verbose: > { > cout << "Setting verbose = true" << endl; > > verbose = true; > > break; > } > case id_help: > { > cout << "TODO: Add short description regarding usage here." << endl; > > exit(EXIT_SUCCESS); > } > /* c seems to equal '?' for missing parameter as well... */ > case ':': > { > cerr << "Missing parameter." << endl; > > break; > } > /* Only triggers for unknown options beginning with -- */ > case '?': > { > cerr << "Ignoring unknown option." << endl; > > break; > } > default: > { > /* Throw exception? */ > cerr << "Should not be reached." << endl; > } > } > } >} > >My first question is about the >cout << "c = " << c << endl; >inside the switch. I never see this output, why? I tried writing the output to a file as well but that file was empty when the program finished. All other "output-statements" are displayed just fine in this function (and the rest of the program). Did you look at the warning you get from the line in question? warning: unreachable code at beginning of switch statement -- Larry Hall http://www.rfk.com RFK Partners, Inc. (508) 893-9779 - RFK Office 838 Washington Street (508) 893-9889 - FAX Holliston, MA 01746 -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/