Re: [Boost-users] [program_options] positional options starting with a '-' sign

Subject: Re: [Boost-users] [program_options] positional options starting with a '-' sign
From: Vladimir Prus (vladimir_at_[hidden])
Date: 2009-07-23 01:44:07

Ian McCulloch wrote:

> 
> Hi,
> 
> I have an app using program_options, which has various optional arguments,
> followed by any number of floating point numbers, which are read as
> positional options.
> 
> A user just pointed out that it fails with an 'unknown option -0' error if
> any of those positional options are negative, because it tries to interpret
> a number like "-0.34" as an option.
> 
> Is there a way to treat unregistered options as positional arguments?
> allow_unregistered() doesn't quite do it - it doesn't give an error anymore
> but neither does it treat "-0.34" as a positional option (even if it is not
> the first positional argument).

This is not presently possible -- and would make for a bad error reporting.
It's possible to use -- to terminate the list of options. Everything thereafter
will be taken as positional option.

- Volodya