router_actor.cpp

template<BehaviorType T>
class RoundRobinRouter
  : public Actor
  , public T
{
    const std::vector<actor_ref<T>> m_children;
    std::vector<actor_ref<T>>::iterator m_it;
    
  public:
    RoundRobinRouter(std::vector<actor_ref<T>> const& actors)
      : m_children(actors), m_it(children.begin()) {}
      
    template<BehaviorReceives<T> Msg>
    void receive(Msg const& msg) {
      (*m_it).send(msg);
      if (++m_it == m_children.end()) {
        m_it = m_children.begin();
      }
    }
}