main.cpp

struct network
{
};

struct handshake
{
    handshake(network& net)
      : net(net)
    {
    }

    network& net;
};

struct foo
{
    foo()
      : hs(net)
    {
    }

    network net;
    handshake hs;
};


int main()
{
    return 0;
}