When using boost::program_options, how does one set the name of the argument?

Question

When using boost::program_options, how do I set the name of an argument for boost::program_options::value<>()?

#include 

        

Answer 1

In recent versions of Boost (only tested for >= 1.61) this is fully supported. Below a slight modification of the first example in the tutorial, where "LEVEL" is printed instead of "arg":

po::options_description desc("Allowed options");
desc.add_options()
    ("help", "produce help message")
    ("compression", po::value()->value_name("LEVEL"), "set compression level")
;

Live Example