move_by.rs

fn main() {
    let mut vec = vec!("1", "1");
    let first = vec.pop();
    let second = vec.pop();
    match (first, second) {
        (Some(a), Some(b)) if a == b => print!("yes"),
        (Some(_), Some(_)) => print!("hi"),
        _ => print!("no")
    }
}
// yes

fn main() {
    let mut vec = vec!("1".to_string(), "1".to_string());
    let first = vec.pop();
    let second = vec.pop();
    match (first, second) {
        (Some(a), Some(b)) if a == b => print!("yes"),
        (Some(_), Some(_)) => print!("hi"),
        _ => print!("no")
    }
}

/*
error[E0008]: cannot bind by-move into a pattern guard
 --> src/main.rs:6:15
  |
6 |         (Some(a), Some(b)) if a == b => print!("yes"),
  |               ^ moves value into pattern guard

error[E0008]: cannot bind by-move into a pattern guard
 --> src/main.rs:6:24
  |
6 |         (Some(a), Some(b)) if a == b => print!("yes"),
  |                        ^ moves value into pattern guard
  */