event-source.hpp

#ifndef EVENT_SOURCE_HPP
#define EVENT_SOURCE_HPP

#include <functional>
#include <vector>

template<class ...Args>
class EventSource {
public:  
  using Listener = std::function<void(Args...)>;
private:
  std::vector<Listener> listeners;
public:
  void on(Listener &&listener) {
    listeners.emplace_back(std::forward<Listener&&>(listener));
  }
  
  void emit(Args &&...args) const {
    for (auto &e : listeners) {
      e(args...);
    }
  }
};

#endif // EVENT_SOURCE_HPP