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  1. #include <mutex>
  2. #include <map>
  3.  
  4. template <class T>
  5. struct Proxy{
  6. 	Proxy(T &t, std::mutex &m) : value{t}, l{m}{}
  7. 	T &value;
  8. 	private:
  9. 	std::unique_lock<std::mutex> l;
  10. };
  11.  
  12. template <class T>
  13. struct Protected{
  14. 	Proxy<T> get(){
  15. 		return {t, m};
  16. 	}
  17. 	private:
  18. 	T t;
  19. 	std::mutex m;
  20. };
  21.  
  22. int main() {
  23. 	Protected<std::map<int, int>> pm;
  24. 	pm.get().value[42] = 5;
  25. }
Success #stdin #stdout 0s 16064KB
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https://ideone.com/6keHrJ
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
secret

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