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#![feature(unsized_tuple_coercion)]
use std::collections::HashSet;
fn main() {
let x : &(i32, i32, [i32]) = &(0, 1, [2, 3]);
let y : &(i32, i32, [i32]) = &(0, 1, [2, 3, 4]);
let mut a = [y, x];
a.sort();
assert_eq!(a, [x, y]);
assert_eq!(&format!("{:?}", a), "[(0, 1, [2, 3]), (0, 1, [2, 3, 4])]");
let mut h = HashSet::new();
h.insert(x);
h.insert(y);
assert!(h.contains(x));
assert!(h.contains(y));
}
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