[−][src]Macro colmac::hashmap
Just like vec!
, but for std::collections::HashMap
.
This macro uses count_args!
to preallocate the exact amount of memory
needed, so it's more efficient than simply iteratively inserting.
#[macro_use] extern crate colmac; use std::collections::HashMap; // create an empty one let empty: HashMap<u64, u64> = hashmap![]; assert_eq!(0, empty.len()); // literal initialization let mut map_a = HashMap::new(); map_a.insert("a", 123); map_a.insert("b", 456); let map_b = hashmap!["a" => 123, "b" => 456]; assert_eq!(map_a, map_b);