Macro ari::btree_set

macro_rules! btree_set {
    ($($key: expr),* $(,)*) => { ... };
}

creates a BTreeSet containing the specified values.

examples.

let map = btree_set![1, 2, 3, 4];

assert_eq!(map.contains(&1), true);
assert_eq!(map.contains(&2), true);
assert_eq!(map.contains(&3), true);
assert_eq!(map.contains(&4), true);
assert_eq!(map.contains(&5), false);