delegating_constructors

Node::Node()
{
    do_something();
}

/* What is the proper syntax here to call the above constructor, and have initialization lists. */
Node::Node(const unsigned int idx, std::shared_ptr<ioctl_node_t> io) : Node(), index(idx), node(io)
{
    do_more_stuff();
}

/* The above results in the following error.
node.cc:26:106: error: mem-initializer for ‘Node::index’ follows constructor delegation
 Node::Node(const unsigned int idx, std::shared_ptr<ioctl_node_t> n) : Node(), index(idx), node(n)
*/