Re: [Boost-users] boost.program_options no throw

From: Niko Vuokko (niko.vuokko_at_[hidden])
Date: 2008-07-16 13:00:10

Michiel Helvensteijn wrote:
> Aljaz wrote:
> 
>> I've been wondering if there is no-throw version of
>> boost::program_options::store , command_line_parser and basic_line_parser
> 
> I don't believe store() throws any exception. I don't think the
> basic_line_parser symbol exists in boost.program_options.
> 
> As for boost::program_options::basic_command_line_parser<T>.. The run()
> function of that class must throw an exception in case of parse errors that
> you need to know about.
> 
> If you would like no stack unrolling to take place on error, you just need
> to surround the call with a try/catch block. If you really don't care about
> what sort of error it is, you can catch boost::program_options::error.
> 
> try {
>     // the function call
> } catch (boost::program_options::error& e) {
>     // handle error... or don't
> }
> 

Or you can always also allow unknown options to get through to you, then 
it won't throw for those, but still for all kinds of other stuff. See 
basic_command_line_parser::allow_unregistered() in the docs.