not_into_option.rs

#![allow(unused_variables)]

// Easy for API author, easy to read documentation
fn foo(lorem: &str, ipsum: Option<i32>, dolor: Option<i32>, sit: Option<i32>) {
    println!("{}", lorem);
}

fn main() {
    foo("bar", None, None, None);               // That looks weird
    foo("bar", Some(42), None, None);           // Okay
    foo("bar", Some(42), Some(1337), Some(-1)); // Halp! Too… much… Some…!
}