#![allow(dead_code, deprecated, unused_variables, unused_mut)]
#![feature(iter_partition_in_place)]
fn main() {
    let mut a = [1, 2, 3, 4, 5, 6, 7];
    let i = a.iter_mut().partition_in_place(|n| n % 2 == 0);
    assert_eq!(i, 3);
    assert!(a[..i].iter().all(| n | n % 2 == 0));
    assert!(a[i..].iter().all(| n | n % 2 == 1));
}