Function parse_environment

boost::program_options::parse_environment

Synopsis

// In header: <boost/program_options/parsers.hpp>


BOOST_PROGRAM_OPTIONS_DECL parsed_options 
parse_environment(const options_description &, 
                  const function1< std::string, std::string > & name_mapper);

Description

Parse environment.

For each environment variable, the 'name_mapper' function is called to obtain the option name. If it returns empty string, the variable is ignored.

This is done since naming of environment variables is typically different from the naming of command line options.