fn main() {
  let x1 = retorna_string();
  let x2 = x1;
  println!("x1: {}, x2: {}", x1, x2);
}

fn retorna_string() -> String {
  return String::from("olá");
}
/*
 --> main.rs:4:30
  |
3 |   let x2 = x1;
  |       -- value moved here
4 |   println!("x1: {}, x2: {}", x1, x2);
  |                              ^^ value used here after move
  |
  = note: move occurs because `x1` has type `std::string::String`, which does not implement the `Copy` trait

error: aborting due to previous error
*/