Joe Gottman wrote:
I recently used the program_options library for the first time and found it very useful. However, there's one easily implemented feature that's missing: the ability to set the name of a parameter that's associated with a particular option. In the first example in the tutorial we have the code
po::options_description desc("Allowed options"); desc.add_options() ("help", "produce help message") ("compression", po::value<int>(), "set compression level") ;
When desc is then sent to cout, the output then looks like
Allowed options: --help : produce help message --compression arg : set compression level
But suppose we wanted the name of the parameter associated with the --compression option to be something other than arg.
I intentionally did not add that bit of flexibility, as I though that configurable 'arg' is not adding all that much to legibility. Do you have some concrete examples?
If this function were included, then the code above could be rewritten as
po::options_description desc("Allowed options"); desc.add_options() ("help", "produce help message") ("compression", po::value<int>()->argument_name("level-number"), "set compression level") ;
and then the output would be
Allowed options: --help : produce help message --compression level-number : set compression level
Well, here, I don't like the duplication between 'level' and 'level-number' Maybe it would be cleaner to have just: --compression arg : set compression level (0-9) or some such? - Volodya