Re: [Boost-users] default value of program options

Subject: Re: [Boost-users] default value of program options
From: Diederick C. Niehorster (dcnieho_at_[hidden])
Date: 2009-12-02 08:00:46

After you run store, you also need to call notify(); think that should
do the trick.

Best,
Dee

On Wed, Dec 2, 2009 at 6:48 PM, Axel <axel.boost_at_[hidden]> wrote:
> Â Hi
>
> I m using program options classes to handles command line arguments (Boost
> version 1.35, Debian lenny packages). I don't manage to get this code work :
>
> boost::program_options::options_description cmd_line_options_("Command line
> options") ;
> boost::program_options::variables_map current_options_ ;
> int port_ = 0 ;
>
> cmd_line_options_.add_options() ("port,p",
> boost::program_options::value<int>(&port_), "specify the destination port to
> use") ;
>
> try
> {
> Â boost::program_options::store(boost::program_options::command_line_parser(argc,
> argv).options(cmd_line_options_).run(), current_options_) ;
> }
> catch(po::error &e)
> {
> Â cout << "Error when parsing command line arguments: " << e.what() << "\n" ;
> }
>
> cout << port_ << ":" << current_options_["port"].as<int>() << endl ;
>
>
> When executing : ./foo --port=12345, the output is :
> 0:12345
>
> The port_ variable value remains to be 0 when the current_options_ variable
> hold the right value (12345).
>
> Could someone tell me what am I doing wrong ?
> Thanks
>
>
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