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  1. #include <memory>
  2. #include <iostream>
  3.  
  4. int main()
  5. {
  6. 	std::default_delete<int> d;
  7. 	std::unique_ptr<int> u1;
  8. 	std::cout << "u1: " << (u1 ? "not null" : "null") << '\n';
  9.  
  10. 	std::unique_ptr<int> u2(nullptr);
  11. 	std::cout << "u2: " << (u2 ? "not null" : "null") << '\n';
  12.  
  13. 	std::unique_ptr<int> u3(new int);
  14. 	std::cout << "u3: " << (u3 ? "not null" : "null") << '\n';
  15.  
  16. 	std::unique_ptr<int> u4(new int, d);
  17. 	std::cout << "u4: " << (u4 ? "not null" : "null") << '\n';
  18.  
  19. 	std::unique_ptr<int> u5(new int, std::default_delete<int>());
  20. 	std::cout << "u5: " << (u5 ? "not null" : "null") << '\n';
  21.  
  22. 	std::unique_ptr<int> u6(std::move(u5));
  23. 	std::cout << "u6: " << (u6 ? "not null" : "null") << '\n';
  24.  
  25. 	std::unique_ptr<int> u7(std::move(u6));
  26. 	std::cout << "u7: " << (u7 ? "not null" : "null") << '\n';
  27. }
Success #stdin #stdout 0s 4568KB
comments (?)
stdin
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Standard input is empty
stdout
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u1: null
u2: null
u3: not null
u4: not null
u5: not null
u6: not null
u7: not null
https://ideone.com/yCjXxK
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
public

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