[Boost-users] [Options Description] positional_options_description throw exception

Subject: [Boost-users] [Options Description] positional_options_description throw exception
From: Sakharuk, Vladimir (vladimir.sakharuk_at_[hidden])
Date: 2010-03-24 11:54:14

Trying to access positional arguments with sample program bellow:

If I run: "a.out one"
Error: unknown option positional
Same error I got on "a.out -h one" and "a.out one -h"

If I run: "a.out one two"
Error: too many positional options

But "a.out -h works"
Thanks \/.

    namespace po=boost::program_options;
    po::options_description cmds("Options");
    cmds.add_options()
      ("help,h", "output help message");

    po::positional_options_description positional;
    positional.add("positional", 1);

    po::variables_map vm;
    po::parsed_options parsed = po::command_line_parser(argc,
argv).options(cmds).positional(positional).run();
    po::store( parsed, vm);
    po::notify(vm);

    if (vm.count("help")) {
      cout << cmds << endl;
      return 0;
    }
    if(vm.count("positional") ) {
      cout << "positional";
    }
  }
  catch(const std::exception& ex) {
    cout << "Error: " << ex.what() << endl;
  }

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