我正在使用 boost::program_options 来处理程序的命令行参数。在下面的程序中,我希望将算法、交换和 admin_port 组合在一起,以便它们都应该提供,否则会引发异常(即,除非它们在一起,否则没有意义)。
我还想以一种可以明显看出它们是一组的方式将它们打印出来。
如何最好地实现这一目标?
#include <boost/program_options.hpp>
#include <cassert>
#include <iostream>
#include <string>
namespace prog_opts = boost::program_options;
int main(int argc, char *argv[])
{
int rc = 0;
prog_opts::options_description desc("Usage");
desc.add_options()
("algo", prog_opts::value<std::string>(), "Name of the algo to run")
("exchanges", prog_opts::value< std::vector<std::string> >(), "Name(s) of the exchanges which will be available for use")
("admin_port", prog_opts::value<unsigned>(), "Admin port on which admin requests will be listened for")
("version", "Show version information")
("help", "Show help information");
prog_opts::variables_map args;
try
{
prog_opts::store(prog_opts::parse_command_line(argc, argv, desc), args);
prog_opts::notify(args);
if(args.count("algo") && args.count("exchanges") && args.count("admin_port"))
{
//TODO:
}
else if(args.count("version"))
{
//TODO:
}
else if(args.count("help"))
{
std::cout << desc << std::endl;
}
else
{
std::cerr << desc << std::endl;
rc = 1;
}
}
catch(const prog_opts::error& e)
{
std::cerr << "Failed start with given command line arguments: " << e.what() << std::endl;
rc = 1;
}
return rc;
}