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  1. #include <memory>
  2.  
  3. struct A 
  4. {
  5. protected:
  6.     A() {}
  7.     friend struct B;
  8.     friend std::unique_ptr<A> std::make_unique<A>();
  9. };
  10.  
  11. struct B 
  12. {
  13.     std::unique_ptr <A> a;
  14.     B() : a( std::make_unique<A>() ) {}
  15. };
  16.  
  17. int main()
  18. {
  19.     B b;
  20. }
Success #stdin #stdout 0s 3456KB
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https://ideone.com/uesddg
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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