#![allow(dead_code, deprecated, unused_variables, unused_mut)]
#![feature(iter_next_chunk)]
fn main() {
    let quote = "not all those who wander are lost";
    let [first, second, third] = quote.split_whitespace().next_chunk().unwrap();
    assert_eq!(first, "not");
    assert_eq!(second, "all");
    assert_eq!(third, "those");
}