Re: [Boost-users] Boost::program_optiions - Defining The Config File As A Cmdline Parameter

From: Vladimir Prus (ghost_at_[hidden])
Date: 2006-04-25 06:45:13

Adam Hartshorne wrote:

> Hi All,
> 
> I want to be able to do the following using the Boost::program_options
> library.
> 
> 1) Parse a set of command line options in a standard way (I know how to
> achieve this).
> 
> 2) Have an command line option which is "get other command line options
> from a config file defined as the argument to this option.
> 
> The example multiple_sources is very close to the sort of thing I want,
> however in that example the config file is hard coded. I want the user
> to interactively set the config file at runtime.
> 
> If I try simply putting the following lines in the set of if statements
> my program crashes (I know this is still hard coding the cfg file, but
> it was a first attempt before I made it more general),
> 
> if ((vm.count("input-file")) {
>          ifstream ifs("multiple_sources.cfg");
>          store(parse_config_file(ifs, config_file_options), vm);
>          notify(vm);
> }

This should work. What is the crash, specifically. Are you sure you're not
calling 'notify' twice? Do you have a a try/catch block to catch any
possible errors?

- Volodya