Re: [Boost-users] [program options] count problem

Subject: Re: [Boost-users] [program options] count problem
From: Olivier Tournaire (olitour_at_[hidden])
Date: 2013-02-02 08:14:42

Oups. Made à mistake ... However the issue is still there:

    if (vm.count("hierarchy"))
    {
        path input_path(hierarchy);
        // DO STUFF
    }
    else if (vm.count("file"))
    {
        for(unsigned int i=0;i<files.size();++i)
        {
            path input_path(files[i]);
            // DO STUFF
        }
    }
    else if (vm.count("directory"))
    {
        for(unsigned int i=0;i<directories.size();++i)
        {
            path input_path(directories[i]);
            // DO STUFF
        }
    }
    else
    {
        cout << "You must choose an option between --hierarchy --file
--directory!" << endl;
        cout << desc << endl;
        return 1;
    }

Le samedi 2 février 2013, Olivier Tournaire a écrit :

> Hi all,
>
> I am having troubles with program options. I try to test if at least some
> of the available options are passed on the command line, but fail for some
> reason using count("option_name"). Here is my code:
>
> int main(int argc, char** argv)
> {
>     string hierarchy;
>     vector<string> files, directories;
>     double vertical_shift;
>     bool show_progress, single_file, single_dir;
>     int target_EPSG, nb_threads;
>
>     po::options_description desc("Allowed options");
>     desc.add_options()
>         ("help
> ,h"
> , "Produce help message")
>         ("hierarchy        ",
> po::value<string>(&hierarchy)
> , "process a hierarchy)
>         ("file             ", po::value<vector<string>
> >(&files)                                            , "process the
> specified files")
>         ("directory        ", po::value<vector<string>
> >(&directories)                                      , "process the
> specified directories");
>
>     po::variables_map vm;
>     try
>     {
>         po::store(po::parse_command_line(argc, argv, desc), vm);
>
>         if (vm.count("help"))
>         {
>             cout << desc << "\n";
>             return 1;
>         }
>
>         po::notify(vm);
>     }
>     catch (const po::error &e)
>     {
>         cerr << "Exception caught ! --> " << e.what() << endl;
>         cout << desc << endl;
>         return 1;
>     }
>
>     if (vm.count("hierarchy"))
>     {
>         path input_path(hierarchy);
>         // DO STUFF
>     }
>     else if (vm.count("files"))
>     {
>         for(unsigned int i=0;i<files.size();++i)
>         {
>             path input_path(files[i]);
>             // DO STUFF
>         }
>     }
>     else if (vm.count("directories"))
>     {
>         for(unsigned int i=0;i<directories.size();++i)
>         {
>             path input_path(directories[i]);
>             // DO STUFF
>         }
>     }
>     else
>     {
>         cout << "You must choose an option between --hierarchy --files
> --directories!" << endl;
>         cout << desc << endl;
>         return 1;
>     }
>
>
> I always fall in the "else". What am I doing wrong?
>
> For instance with this command line : ./acute_coordinates_transform
> --hierarchy ~/work/data/
>
> À other question: is there à way to specify that 1 of the 3 options is
> required (and only 1)?
>
> Hope you cloud help.
>
> Regards,
>
> Olivier
>