Simple lisp-style cond blocks for chaining if-statements in rust without the boilerplate of writing if else if else if

cond.rs

macro_rules! cond {
    ($($e:expr => $body:expr),+, _ => $default:expr) => (
        $(if $e { $body } else)+ { $default }
    );
    
    ($e:expr => $body:expr) => ( if $e { $body })
}

fn main() {
    let age = 25;
    cond! {
        age <= 12 => println!("you're quite young"),
        age > 12 && age <= 19 => println!("pff, teenagers"),
        age > 19 && age <= 30 => println!("respectable age, I'd say!"),
        _ => println!("you're getting old!")
    };
    
    cond!{ age == 25 => println!("... I don't even know where to start with you") };
}

Link to the playground [here]