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  1. #include <iostream>
  2. #include <memory>
  3.  
  4.  
  5. namespace myns
  6. {
  7.  
  8. class Base
  9. {
  10. public:
  11.  
  12.     Base() = default;
  13.     virtual ~Base() = default;
  14.  
  15.     virtual void Create()
  16.     {
  17.         std::cout  << "Created in Base" << std::endl;
  18.     }
  19.  
  20.     virtual void Destroy()
  21.     {
  22.         std::cout  << "Destroyed in Base - " << std::endl;
  23.     }
  24. };// class Base
  25.  
  26. class ADerivded : public Base
  27. {
  28. public:
  29.  
  30.     void Create() override
  31.     {
  32.         std::cout  << "Created in ADerivded" << std::endl;
  33.     }
  34.  
  35.     void Destroy() override
  36.     {
  37.         std::cout  << "Destroyed in ADerivded" << std::endl;
  38.     }
  39.  
  40. };// class ADerivded
  41.  
  42. template<typename T>
  43. void unmake(T* ptr)
  44. {
  45.     ptr->Destroy();
  46.     delete ptr;
  47. }
  48.  
  49. template<typename T, typename... Arguments>
  50. std::shared_ptr<T> make(Arguments&&... args)
  51. {
  52.     std::shared_ptr<T> ptr = std::shared_ptr<T>(new T(), myns::unmake<T>);
  53.     ptr->Create(std::forward<Arguments>(args)...);
  54.     return ptr;
  55. }
  56.  
  57. }//namespace myns
  58.  
  59. using namespace std;
  60.  
  61. int main()
  62. {
  63.     shared_ptr<myns::ADerivded> a = myns::make<myns::ADerivded>();
  64.  
  65.     return 0;
  66. }
  67.  
Success #stdin #stdout 0s 15240KB
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stdin
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Standard input is empty
stdout
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Created in ADerivded
Destroyed in ADerivded
https://ideone.com/2STDMv
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
public

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