2.7 Simpler implementation of Drop?

[shanmahe]

I wasn't familiar with the concept of tail recursion so didn't understand Section 2.7 fully, but this is what I came up with for implementing the Drop trait:

impl Drop for List {
    fn drop(&mut self) {
        while let Link::More(node) = mem::replace(&mut self.head, Link::Empty) {
            self.head = node.next;
        }
    }
}

Q: Is it logically equivalent to the code in the book? If so, this is more elegant imo.