option/
option.rs

1extern crate kaf;
2extern crate log;
3
4fn main() {
5    kaf::init();
6
7    let some: Option<&str> = Some("ok");
8    let none: Option<&str> = None;
9
10    log::trace!("{:?}", some);
11    log::debug!("{:?}", some);
12    log::info!("{:?}", some);
13    log::warn!("{:?}", some);
14    log::error!("{:?}", none);
15}