Macro hash_map

macro_rules! hash_map {
    () => { ... };
    ($($key:expr => $val:expr),*) => { ... };
}

Creates a new HashMap instance.

This macro can be used in two forms:

• Without arguments, it creates an empty HashMap.
• With key-value pairs, it creates a HashMap and inserts the provided pairs into it.

Examples

Creating an empty HashMap:

let my_map = map!();
assert!(my_map.is_empty());

Creating a HashMap with key-value pairs:

use std_macro_extensions::*;
let my_map = hash_map!("a" => 1, "b" => 2);
assert_eq!(my_map["a"], 1);
assert_eq!(my_map["b"], 2);