Scope For Mutalbe References

NOTE: this can probably be moved to a later part of the book.

This is the earlier example that doesn't work. If we move the println for bravo up it does work.

TODO: There is scope stuff that comes in to play but there's no explicit scope here so I'm guessing rust sees that bravo isn't going to be used anymore after charlie is set so it uses that for scope?

fn main() {

  let mut alfa = String::from("widget");

  let bravo = &mut alfa;
  println!("bravo {}", bravo);

  let charlie = &mut alfa;
  println!("charlie {}", charlie);

}

Look more and the example on this page.

https://doc.rust-lang.org/book/ch04-02-references-and-borrowing.html