Re: [Boost-users] boost.program_options - reloading configuration file

Subject: Re: [Boost-users] boost.program_options - reloading configuration file
From: Aljaz (aljaz.fajmut_at_[hidden])
Date: 2008-10-16 08:13:52

I tried clearing m_variables map by doing m_variables.clear() (which is a 
member of configuration class) - but after that some variables from the 
configuration file wont be read.

If I constrct new variables map each time I want to reload configuration 
file it works just fine.

Is there any other way around this problem?
I would like to be able to use one variables map so that I could use 
functions read_command_line() and read_config_file() which are both members 
of configuration class.

Many thanks!

"Aljaz" <aljaz.fajmut_at_[hidden]> wrote in message 
news:gd5nsq$7fb$1_at_ger.gmane.org...
> Hello
>
> I want to implement function in my application which would allow me to 
> reload the configuration file.
>
> At the moment I have all neccessary program_options objects inside a 
> configuration class, and when I do:
>
> bool configuration::reload_config_file(std::string filename) {
> try {
>    std::ifstream ifs(filename.c_str());
>    if (!ifs.is_open()) return false;
>
> 
> boost::program_options::store(boost::program_options::parse_config_file(ifs, 
> m_config), m_variables);
>    boost::program_options::notify(m_variables);
>
>    ifs.close();
> }
> catch (std::exception &e) {
>    return false;
> }
>   return true;
> }
>
> The options will stay the same although the configuration file is 
> different.
> Should I somehow clear the m_variables object?
>
> Many thanks in advance!