Allow ? in (short) option name

[tom42]

Hello,

I was trying to mimick a parser built with glibc's argp. argp's built in help option can be invoked with either the -? or the --help option.

When I write the following, I get an exception ("Invalid option format '?,help'")

options.add_options("")("?,help", "Print this help")

Would it be possible to allow the ? character, at least for short option names?

Regards Thomas

[jarro2783]

That should be pretty straight forward. I can't see why that can't be a valid character.