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  1. #include <iostream>
  2. #include <memory>
  3.  
  4. using namespace std;
  5.  
  6. class Genre
  7. {
  8. 	public:
  9. 		Genre() = default;
  10. 	std::string name;	
  11. };
  12.  
  13. struct Provider
  14. {
  15. 	public:
  16. 		Provider() = default;
  17. 	std::string name;	
  18. 	std::string logo;
  19. };
  20.  
  21.  
  22. template <typename T, typename R>
  23. void foo(std::shared_ptr<T>* ptr, R T::* member) 
  24. {
  25. 	std::cout << ptr->get()->*member << std::endl;
  26. 	ptr->get()->*member = "...";
  27. }
  28.  
  29. template <typename T, typename R>
  30. void foo2(std::shared_ptr<T>* ptr, R T::* member) 
  31. {
  32. 	std::cout << (&*ptr)->*member << std::endl;
  33. 	(&*ptr)->*member = "...";
  34. }
  35.  
  36. int main() {
  37. 	auto genre = std::make_shared<Genre>();
  38. 	auto provider = std::make_shared<Provider>();
  39.  
  40. 	genre->name = "123";
  41. 	provider->logo = "http://";
  42.  
  43. 	foo<Genre, std::string>(&genre, &Genre::name);
  44. 	foo<Genre, std::string>(&genre, &Genre::name);
  45.  
  46. 	foo<Provider, std::string>(&provider, &Provider::logo);
  47. 	foo<Provider, std::string>(&provider, &Provider::logo);
  48.  
  49.  
  50. 	return 0;
  51. }
Success #stdin #stdout 0s 3232KB
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stdin
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Standard input is empty
stdout
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123
...
http://
...
https://ideone.com/qlBirp
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
secret

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