macro_rules! btmap { () => { ... }; ( $($key: expr => $value: expr),+ $(,)? ) => { ... }; }
Create a BTreeMap from a list of key-value pairs.
BTreeMap
use sugars::btmap; let map = btmap! { "a" => 1, "b" => 2, }; assert_eq!(map["a"], 1); assert_eq!(map["b"], 2); assert_eq!(map.get("c"), None);