macro_with_hash.rs

use std::collections::HashMap;

macro_rules! map {
    ($( $key:expr => $value:expr ),*) => {{
        let mut hm = HashMap::new();
        $(hm.insert($key, $value); )*;
        hm
    }};
}

fn main() {
    let user = map!(
        "name" => "Draven",
        "gender" => "Male"
    );

    println!("Userr {:?}", user);
}