clojure.lang.PersistentVector.TransientVector.pop C# (CSharp) Метод

            public ITransientVector pop()
            {
                EnsureEditable();
                if (_cnt == 0)
                    throw new InvalidOperationException("Can't pop empty vector");
                if (_cnt == 1)
                {
                    _cnt = 0;
                    return this;
                }
                int i = _cnt - 1;
                // pop in tail?
                if ((i & 0x01f) > 0)
                {
                    --_cnt;
                    return this;
                }
                object[] newtail = EditableArrayFor(_cnt - 2);

                Node newroot = PopTail(_shift, _root);
                int newshift = _shift;
                if (newroot == null)
                {
                    newroot = new Node(_root.Edit);
                }
                if (_shift > 5 && newroot.Array[1] == null)
                {
                    newroot = EnsureEditable((Node)newroot.Array[0]);
                    newshift -= 5;
                }
                _root = newroot;
                _shift = newshift;
                --_cnt;
                _tail = newtail;
                return this;
            }