1/// Simple macro for initialization of hashmap 2#[macro_export] 3macro_rules! map { 4 ($($key:expr => $val:expr),* $(,)?) => { 5 { 6 use std::collections::HashMap; 7 8 let mut map = HashMap::new(); 9 10 $( 11 map.insert($key, $val); 12 )* 13 14 map 15 } 16 }; 17}