#ifndef INVOKER_HPP
#define INVOKER_HPP

#include "steppable.hpp"
#include <memory>
class Invoker {
public:
  virtual ~Invoker() = default;
  std::weak_ptr<Steppable> target;

  void set_target(std::shared_ptr<Steppable> t) { target = t; }
  void request() {
    if (auto sp = target.lock()) {
      sp->step();
    }
  }
};

#endif