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<string>& 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
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