Re: [Boost-users] [program_options] patch - optional argument support (gnu getopt_long style)

From: Bryan Green (bgreen_at_[hidden])
Date: 2007-07-24 12:12:52

On Tue, Jul 24, 2007 at 09:02:02AM +0100, Steven Mackenzie wrote:
> Very useful to me, thanks!
> 
> I'm guessing that the implicit_value is distinct from the default_value, so that
> the default can be set seperately if the option is completely absent from the
> command line?

That is the idea.  I just tested it, and it appears to work as expected.

> My worry would be explaining the different command line syntax for applications
> with this type of option to my users, but I understand why it is necessary.
 
Hmm, perhaps you could look at the getopt_long manpage for inspiration.
I'm not sure how great my 'name()' method is for generating the usage
statement.  Ideas welcome.

-Bryan