#![allow(dead_code, deprecated, unused_variables, unused_mut)]
fn main() {
    assert!([1, 2, 2, 9].iter().is_sorted());
    assert!(! [1, 3, 2, 4].iter().is_sorted());
    assert!([0].iter().is_sorted());
    assert!(std::iter::empty::< i32 > ().is_sorted());
    assert!(! [0.0, 1.0, f32::NAN].iter().is_sorted());
}