ssrt_ex_012.rs

fn main() {
  let x = String::from("Mysterious first letter!");
  let ref_x = first_letter(&x);
  take_ownership(x); // ERROR: ref_x still exists and is "borrowing" x
                     // We can't delete x safely!
  println!("{}ystery solved!", ref_x);
}

fn first_letter(input: &str) -> &str {
  &input[0..1]
}

fn take_ownership(of_this: String) -> () {
  println!("I will destroy you: \"{}\"", of_this);
}