Hi,
I want to implement the --switch / --no-switch behavior.
I defined a bool option "switch" and then I parse the command line with
an extra parser that sets "switch" to "false" if it finds a --no-switch.
myopts.add_options()
("switch", po::value<bool>()->implicit_value(true), "Use switch.")
;
po::store (po::command_line_parser(argc,
argv).options(all).extra_parser(parse_no_options).run(), vm);
The extra parser is:
std::pair parse_no_options
(const std::string& s, const std::string name) {
if (s.find("--switch") != s.npos) {
if (s.substr (2, 3) == "no-")
return std::make_pair (s.substr (5), std::string("false"));
else
return std::make_pair (s.substr (2), std::string("true"));
}
return std::make_pair (std::string(), std::string());
}
This works fine for the command line.
I also need to implement this for the config file, but I do not know how
to pass the extra parser to the parse_config_file. Is there a way?
Thanks,
Marti
