Macro moveit::stackbox

macro_rules! stackbox {
    ($(let $(mut)? $name:ident $(: $ty:ty)? = $expr:expr);*) => { ... };
}

Constructs a StackBox.

Because StackBoxes need to own data on the stack, but that data cannot move with the StackBox, it must be constructed using this macro. For example:

stackbox!(let x = 5);
stackbox! {
  let y: StackBox<i32> = StackBox::into_inner(x);
  let mut z = *y as u64;
}

This macro is a shortcut for calling slot! followed by Slot::put().