take_mut_scope_example.rs

extern crate take_mut;

let mut a = 5i32;
let mut b = 6i32;

take_mut::scope(|scope| {
    let (a_val, a_hole) = scope.take(&mut a);
    let (b_val, b_hole) = scope.take(&mut b);
    b_hole.fill(a_val);
    a_hole.fill(b_val);
});