Macro ari::btree_map

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

creates a BTreeMap containing the specified entries.

examples.

let map = btree_map![
    "key_1" => "value_1",
    "key_2" => "value_2",
];

assert_eq!(map["key_1"], "value_1");
assert_eq!(map["key_2"], "value_2");