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  1. #include <functional>
  2. #include <iostream>
  3. #include <memory>
  4.  
  5. class AAA {};
  6. class BBB {};
  7.  
  8. class Notifier
  9. {
  10. public:
  11.     Notifier(std::function<void(AAA&, BBB&)> on_notify)
  12.         :on_notify_(on_notify)
  13.     { }
  14.  
  15.     void notify()
  16.     {
  17.         if (on_notify_)
  18.         {
  19.             AAA a{};
  20.             BBB b{};
  21.             on_notify_(a, b);
  22.         }
  23.     }
  24.  
  25.     std::function<void(AAA&, BBB&)> on_notify_;
  26. };
  27.  
  28. struct Manager
  29. {
  30.     Manager()
  31.     {
  32.         n_ = std::make_unique<Notifier>(std::bind(&Manager::trigger, this));
  33.     }
  34.  
  35.     void trigger()
  36.     {
  37.         std::cout << "it's also notified!" << std::endl;
  38.     }
  39.  
  40.     std::unique_ptr<Notifier> n_;
  41. };
  42.  
  43. int main()
  44. {
  45.     Manager s;
  46.     s.n_->notify();
  47. }
Success #stdin #stdout 0s 3460KB
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Standard input is empty
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it's also notified!
https://ideone.com/2DVG6J
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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