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  1. #include <iostream>
  2. #include <memory>
  3. using namespace std;
  4.  
  5. template <typename T>
  6. struct Destroy {
  7. 	void operator()(T *t) const {
  8. 		t->destroy();
  9. 	}
  10. };
  11.  
  12. class IRuntime {
  13. public:
  14. 	virtual ~IRuntime() = default;
  15. 	virtual void destroy() = 0;
  16. };
  17.  
  18. class IRuntimeImpl : public IRuntime {
  19. public:
  20. 	IRuntimeImpl() {
  21. 		cout << "created " << this << endl;
  22. 	}
  23.  
  24. 	~IRuntimeImpl() override {
  25. 		cout << "destroyed " << this << endl;
  26. 	}
  27.  
  28. 	void destroy() override {
  29. 		delete this;
  30. 	}
  31. };
  32.  
  33. IRuntime* createIRuntime() {
  34. 	return new IRuntimeImpl;
  35. }
  36.  
  37. class Test {
  38.  
  39. 	std::unique_ptr<IRuntime, Destroy<IRuntime>> runtime;
  40.  
  41. public:
  42. 	Test() : runtime(createIRuntime()) {
  43. 	}
  44. };
  45.  
  46. int main() {
  47. 	std::unique_ptr<IRuntime, Destroy<IRuntime>> runtime(createIRuntime());
  48. 	Test{};
  49. 	return 0;
  50. }
Success #stdin #stdout 0s 5508KB
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stdin
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Standard input is empty
stdout
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created 0x55ea9da49e70
created 0x55ea9da4aea0
destroyed 0x55ea9da4aea0
destroyed 0x55ea9da49e70
https://ideone.com/t0GKWM
language:
C++ 4.3.2 (gcc-4.3.2)
created:
3 years ago
visibility:
public

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