#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <iterator>

#include <boost/program_options.hpp>

namespace po = boost::program_options;

int main( int argc, char *argv[] )
{
        po::options_description desc( "Allowed options" );
        desc.add_options()
                ( "multitoken,m",
                  po::value< std::vector< std::string > >()->multitoken(),
                  "values"
                )
                ( "file",
                  po::value< std::string >(),
                  "the file to process"
                )
        ;

        po::positional_options_description p;
        p.add( "file", 1 );

        po::variables_map vm;
        po::store( po::command_line_parser( argc, argv ).options( desc ).positional( p ).run(), vm );
        po::notify( vm );

        std::string file;
        if ( vm.count( "file" ) )
                file = vm[ "file" ].as< std::string >();
        std::vector< std::string > multi;
        if ( vm.count( "multitoken" ) )
                multi = vm[ "multitoken" ].as< std::vector< std::string > >();

        std::cout << "File: " << file
                  << "\nMultitoken: ";
        std::copy( multi.begin(), multi.end(), std::ostream_iterator< std::string >( std::cout, " " ) );
        std::cout << std::endl;
}