Macro velcro::btree_map

btree_map!() { /* proc-macro */ }

An initializer for BTreeMap, allowing for entries to be specified individually or for the same value to be given to multiple keys using the .. operator.

Usage

use velcro::btree_map;

let mut map1 = BTreeMap::new();
map1.insert('a', 0);
map1.insert('b', 1);
map1.insert('c', 1);
map1.insert('d', 1);
map1.insert('e', 1);
map1.insert('f', 2);

let map2 = btree_map! {
    'a': 0,
    ..('b'..='e'): 1,
    'f': 2
};

assert_eq!(map1, map2);