Hi, I'm having a problem with boost::program_options. I attached a stripped-down version of the code that demonstrates the problem. I have a number of positional arguments ( "ops" ), and one normal argument ( "input-file,i" ). Now, if i run the program ./op_test pos0 pos1 pos2 -i non_positional it interpretes the "non_positional" as further positional arg, and not as parameter belonging to -i. Any hints on how to solve this are greatly appreciated. My machine: Mac OS X 10.4 ppc ( G5 ) XCode 2.4.1 ( gcc 4.0.1 ) boost 1.34 Greetings, Jonas The code: // ------------------------ options.h ------------------- #ifndef __VMML__OPTIONS__H__ #define __VMML__OPTIONS__H__ #include #include<map> namespace vmml { namespace boost_po = ::boost::program_options; typedef ::boost::program_options::variables_map var_map; class options { public: options(); void setup( int argc, char* argv[] ); void get_operator_chain( std::vector< std::string >& op_chain ); protected: // generic options boost_po::options_description _generic_options; // op chain boost_po::options_description _all_options; std::map< std::string, boost_po::options_description* > _op_descs; // positional options boost_po::positional_options_description _positional_desc; boost_po::variables_map _options_map; std::vector< std::vector< std::string > > _op_cfgs_from_file; };//class options };//namespace vmml #endif // --------- options.cpp -------------------------------- #include "options.h" #include <iostream> #include <vector> #include <string> namespace vmml { options::options() : _generic_options( "Generic options" ) { _generic_options.add_options() ("input-file,i", "specify input file") ("ops,O", boost_po::value< std::vector< std::string > >()-

composing(), "specify operators " ) ; _positional_desc.add( "ops", -1 ); }

void options::setup( int argc, char* argv[] ) { _all_options.add( _generic_options ); boost_po::store( boost_po::command_line_parser( argc, argv ) .options( _all_options ) .positional( _positional_desc ) //.allow_unregistered() .run(), _options_map ); boost_po::notify( _options_map ); } void options::get_operator_chain( std::vector< std::string >& op_chain ) { if ( _options_map.count("ops") ) { const std::vector< std::string >& ops = _options_map["ops"].as< std::vector< std::string > >(); op_chain = ops; } } }//namespace vmml int main( int argc, char** argv ) { vmml::options opt; opt.setup( argc, argv ); std::vector< std::string > ops; opt.get_operator_chain( ops ); std::vector< std::string >::iterator it = ops.begin(); std::vector< std::string >::iterator itend = ops.end(); for( ; it != itend; ++it ) { std::cout << *it << std::endl; } }