I use boost.program_options library. Consider this simplified case.
po::options_description desc("Usage");
desc.add_options()
("uninstall,u", "uninstall program")
("custom,c", po::wvalue<std::wstring>(), "specify custom action");
po::variables_map vm;
po::store(po::parse_command_line(argc, argv, desc), vm);
po::notify(vm);
I want to produce error on such command-line:
testprog.exe -u c- action1
Note, user made a typo "c-" instead of "-c". But the parser understands this as a single -u option. How do I handle such cases?
I want to produce error on such command-line:
testprog.exe -u c- action1
Note, user made a typo "c-" instead of "-c". But the parser understands this as a single -u option. How do I handle such cases?
Instruct the program_options
library to accept no positional arguments and you get the desired behavior
code & compile:
macmini:stackoverflow samm$ cat po.cc
#include <boost/program_options.hpp>
#include <boost/version.hpp>
#include <iostream>
int
main(int argc, char* argv[])
{
namespace po = boost::program_options;
po::options_description desc("Usage");
desc.add_options()
("uninstall,u", "uninstall program")
("custom,c", po::wvalue<std::wstring>(), "specify custom action")
;
po::variables_map vm;
po::command_line_parser cmd_line( argc, argv );
cmd_line.options( desc );
cmd_line.positional( po::positional_options_description() );
try {
po::store( cmd_line.run(), vm );
po::notify(vm);
} catch ( const std::exception& e ) {
std::cerr << e.what() << std::endl;
return -1;
}
return 0;
}
macmini:stackoverflow samm$ g++ po.cc -I /opt/local/include -L/opt/local/lib -lboost_program_options -Wl,-rpath,/opt/local/lib
run:
macmini:stackoverflow samm$ ./a.out -u c- action1
too many positional options
macmini:stackoverflow samm$ ./a.out -u -c action1
macmini:stackoverflow samm$