#![allow(unused_variables)]
#![feature(string_into_chars)]
fn main() {
    let word = String::from("goodbye");
    let mut chars = word.into_chars();
    assert_eq!(Some('g'), chars.next());
    assert_eq!(Some('o'), chars.next());
    assert_eq!(Some('o'), chars.next());
    assert_eq!(Some('d'), chars.next());
    assert_eq!(Some('b'), chars.next());
    assert_eq!(Some('y'), chars.next());
    assert_eq!(Some('e'), chars.next());
    assert_eq!(None, chars.next());
}