macro_rules! ordermap { (@single $($x:tt)*) => { ... }; (@count $($rest:expr),*) => { ... }; ($($key:expr => $value:expr,)+) => { ... }; ($($key:expr => $value:expr),*) => { ... }; }
Expand description
Create an OrderMap
from a list of key-value pairs
Example
#[macro_use] extern crate ordermap;
let map = ordermap!{
"a" => 1,
"b" => 2,
};
assert_eq!(map["a"], 1);
assert_eq!(map["b"], 2);
assert_eq!(map.get("c"), None);
// "a" is the first key
assert_eq!(map.keys().next(), Some(&"a"));