How to use boost program_options to consume/remove an option in ARGV after usage

Question

Currently, our codebase is using boost program_options as command-line parser in our testing framework. I want to implement a "consume-after-use" kind of rule in our command-line parsing.

What I mean by "consume-after-use" is, for example. After --option1 is used, I can then remove this --option1 in ARGC, ARGV. The main reason for this is I want to pass ARGC, and ARGV in another parser after I use the options I'm only concerned with.

Is this possible in boost program_option?

Answer 1

As you can read here the boost::program_options::variables_map inherites from std::map, so you can call std::map:erase on it:

namespace po = boost::program_options;

po::variables_map vm;
po::store(po::parse_command_line(ac, av, desc), vm);
po::notify(vm);

if (vm.count("option1")) {
    // handle option1
    ...
    // erase option1
    vm.erase("option1");
    if (vm.count("option1")) {
      // never gonna happen
    }
}