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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. //GraphDevice.h
  5. struct Application;
  6. struct GraphDevice
  7. {
  8. 	friend struct Application;
  9. 	struct Impl;
  10. 	GraphDevice();
  11. private:
  12. 	void initialize();
  13. 	Impl *impl;
  14. };
  15. //GraphDevice.cpp
  16.  
  17. struct GraphDevice::Impl
  18. {
  19. 	void initialize()
  20. 	{
  21. 		cout << "initialize!" << endl;
  22. 	}
  23. };
  24.  
  25. GraphDevice::GraphDevice()
  26. {
  27. 	impl = new Impl;
  28. }
  29.  
  30. void GraphDevice::initialize()
  31. {
  32. 	impl->initialize();
  33. }
  34.  
  35. //Application.h
  36. struct Application
  37. {
  38. 	struct Impl;
  39. 	Application();
  40. 	void initialize();
  41. private:
  42. 	Impl *impl;	
  43. };
  44.  
  45. //Application.cpp
  46. struct Application::Impl
  47. {
  48. 	GraphDevice *gd;
  49. 	void initialize()
  50. 	{
  51. 		gd = new GraphDevice;
  52. 		gd->initialize();
  53. 	}
  54. };
  55.  
  56. Application::Application()
  57. {
  58. 	impl = new Impl;
  59. }
  60.  
  61. void Application::initialize()
  62. {
  63. 	impl->initialize();
  64. }
  65.  
  66. //main.cpp
  67. int main() {
  68. 	Application app;
  69. 	app.initialize();
  70. 	return 0;
  71. }
Success #stdin #stdout 0s 3272KB
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Standard input is empty
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initialize!
https://ideone.com/gt82OY
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
secret

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