Re: [Boost-users] [program_options] strange assertions

9 Aug 2006

      Just found out:

if default value is removed from the line:

    options_description config("Configuration");
    config.add_options()
		("worker-threads,w", po::value<int>(), , "Each worker thread starts parsing of one
file.\ndefault: 20")
;

No assertions are produced.

There should be some problems with bounds, maybe...

Thanks,
Ovanes

On Wed, August 9, 2006 18:35, Ovanes Markarian wrote:
...
Hi!
I use MS VC8.0 (2005) Express Edition.
This code sample causes the following assertion:
int main(int argc, char* argv[])
{
    options_description generic("Generic options");
    generic.add_options()
        ("version,v", "print version string")
        ("help,h", "produce help message")
        ;
// Declare a group of options that will be
    // allowed both on command line and in
    // config file
    options_description config("Configuration");
    config.add_options()
      ("worker-threads,w", po::value<int>()->default_value(20), "Each worker thread starts parsing of
one file.\ndefault: 20")
      ;
options_description cmdline_opt, cfgf_opt;
  cmdline_opt.add(generic).add(config);
  cfgf_opt.add(config);
variables_map vm;
  store(command_line_parser(argc, argv).options(cmdline_opt).run(), vm);
ifstream ifs("scanning_options.cfg");
  store(parse_config_file(ifs, cfgf_opt), vm);
  notify(vm);
if(vm.count("help"))
      cout << config << endl;
//... some other code
return 0;
}
In this line:
  cout << config << endl;