Method swap_remove

cranelift/entity/src/list.rs:586–595

Removes the element at `index` in constant time by switching it with the last element of the list.

(&mut self, index: usize, pool: &mut ListPool<T>)

    /// Removes the element at `index` in constant time by switching it with the last element of
    /// the list.
    pub fn swap_remove(&mut self, index: usize, pool: &mut ListPool<T>) {
        let seq = self.as_mut_slice(pool);
        let len = seq.len();
        debug_assert!(index < len);
        if index != len - 1 {
            seq.swap(index, len - 1);
        }

        self.remove_last(len, pool);
    }

    /// Shortens the list down to `len` elements.
    ///