#![allow(dead_code, deprecated, unused_variables, unused_mut)]
#![feature(iter_next_chunk)]
fn main() {
    let mut iter = "lorem".chars();
    assert_eq!(iter.next_chunk().unwrap(), ['l', 'o']);
    assert_eq!(iter.next_chunk().unwrap(), ['r', 'e', 'm']);
    assert_eq!(iter.next_chunk::< 4 > ().unwrap_err().as_slice(), & []);
}