Pattern matching with guards on a number

---

Rust does not take in account the guard conditions when checking if the arms cover all the possible values. In other words Rust cannot see that our first 3 conditions are exhaustive and that the last condition will never be reached. Thus Rust requires the catch-all _ to be present in order to compile the code

examples/other/match-numbers/src/main.rs

fn main() {
    let age = 65;
    match age {
        x if x < 18 => println!("You are a minor"),
        x if x >= 18 && x <= 65 => println!("You are an adult"),
        x if x>65 => println!("You are a senior citizen"),
        _ => println!("Invalid age")
    }
}