Binding Example

// A function `age` which returns a `u32`.
fn age() -> u32 {
    15
}

fn main() {
    println!("Tell me what type of person you are");

    match age() {
        0 => println!("I haven't celebrated my first birthday yet"),
        // Could `match` 1 ..= 12 directly but then what age
        // would the child be? Instead, bind to `n` for the
        // sequence of 1 ..= 12. Now the age can be reported.
        n @ 1..=12 => println!("I'm a child of age {:?}", n),
        n @ 13..=19 => println!("I'm a teen of age {:?}", n),
        // Nothing bound. Return the result.
        n => println!("I'm an old person of age {:?}", n),
    }
}