basic_parsed_options<charT>
parse_config_file(std::basic_istream<charT>& is,
const options_description& desc)
{
set<string> allowed_options;
set<string> pm = desc.primary_keys();
for (set<string>::iterator i = pm.begin(); i != pm.end(); ++i) {
const option_description& d = desc.find(*i);
if (d.long_name().empty())
throw error("long name required for config file");
allowed_options.insert(d.long_name());
}
// Parser return char strings
parsed_options result(&desc);
copy(detail::basic_config_file_iterator<charT>(is, allowed_options),
detail::basic_config_file_iterator<charT>(),
back_inserter(result.options));
// Convert char strings into desired type.
return basic_parsed_options<charT>(result);
}
