Function jg::input::match_input

pub fn match_input<'a>(
    config: &Config, 
    on_line: &dyn Fn(String) -> Result<String, String>, 
    on_result: &dyn Fn((Option<usize>, Option<usize>, Result<String, String>)) -> (Option<usize>, Option<usize>)
) -> Result<Option<usize>, Option<String>>