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

The approach given by Codebender is the only one you can use. This is actually intentional -- using "NUM" for name of argument appears to be micro-optimization that is not worth doing. A good description of the option should also say what kind of argument is expected.