#![allow(dead_code, deprecated, unused_variables, unused_mut)]
#![feature(option_reduce)]
fn main() {
    let s12 = Some(12);
    let s17 = Some(17);
    let n = None;
    let f = |a, b| a + b;
    assert_eq!(s12.reduce(s17, f), Some(29));
    assert_eq!(s12.reduce(n, f), Some(12));
    assert_eq!(n.reduce(s17, f), Some(17));
    assert_eq!(n.reduce(n, f), None);
}