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  1. #include <iostream>
  2. #include <memory>
  3. #include <vector>
  4. #include <functional>
  5. using namespace std;
  6.  
  7. class Strategy; 
  8. struct ScheduledEvent {
  9. 	function<void(Strategy*)> tocall; 
  10. 	void perform(Strategy*u) { tocall(u); }
  11. 	ScheduledEvent(function<void(Strategy*)> func) : tocall(func) { }
  12. };
  13.  
  14. class Strategy {
  15. 	vector<unique_ptr<ScheduledEvent>> heap_eventlist;
  16. public: 
  17. 	void schedule_function(function<void(Strategy*)> func) {
  18.     	// Puts the scheduled event built with the strategy function onto a list
  19.     	heap_eventlist.emplace_back(std::make_unique<ScheduledEvent>(func));
  20. 	}
  21. 	void do_it() {
  22. 		for (auto &x:heap_eventlist) 
  23. 			x->perform(this);
  24. 	}
  25.     virtual void f() { cout <<"Strategy"<<endl; }
  26. };
  27.  
  28. struct BasicAlgo : Strategy {
  29. 	string b="BasicAlgo";
  30.     void ff() { cout << b<<endl; }
  31. };
  32.  
  33.  
  34. int main() {
  35. 	BasicAlgo g;
  36. 	g.schedule_function (&BasicAlgo::f);
  37. 	g.schedule_function ([](Strategy *x)->void { BasicAlgo*b=dynamic_cast<BasicAlgo*>(x); if (b) b->ff(); });
  38.     g.do_it(); 
  39.  
  40. 	return 0;
  41. }
Success #stdin #stdout 0s 15240KB
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Strategy
BasicAlgo
https://ideone.com/7dwNdV
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
public

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