#include <iostream>

class StateBase {
public:
  virtual void handleThis() {
    std::cout << "handleThis: StateBase" << std::endl;
  }
  virtual void handleThat() {
    std::cout << "handleThat: StateBase" << std::endl;
  }
};

class StateInactivated : public virtual StateBase {};

class StateMixinQueueableMessages : virtual StateBase {
private:
  virtual bool stateCanExecuteMessages() = 0;

public:
  void handleThis() override {
    std::cout << "handleThis: StateMixinQueueableMessages: "
              << (stateCanExecuteMessages() ? "Executing message" : "Queueing message")
              << std::endl;
  }
};

class StateActivated : public virtual StateMixinQueueableMessages, public virtual StateBase {
  bool stateCanExecuteMessages() override { return true; }
};

class StateReconfiguring : public virtual StateMixinQueueableMessages, public virtual StateBase {
  bool stateCanExecuteMessages() override { return false; }
};

int main() {
  StateInactivated inactivated;
  StateActivated activated;
  StateReconfiguring reconfiguring;

  inactivated.handleThis();
  activated.handleThis();
  reconfiguring.handleThis();

  std::cout << std::endl;

  inactivated.handleThat();
  activated.handleThat();
  reconfiguring.handleThat();
}