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  1. #include <memory>
  2. #include <vector>
  3. #include <iostream>
  4. #include <string>
  5. using namespace std;
  6.  
  7. /// The baseclass providing the method you want to call in derived classes.
  8. class Base {
  9. public:
  10. 	explicit Base(const string& name)
  11. 		: m_name(name)
  12. 	{
  13. 	}
  14.  
  15. private:
  16. 	void private_method(const string& msg) // <= This is the method you want to call
  17. 	{
  18. 		cout << "Private method of " << m_name 
  19. 			 << " called with message: " << msg << endl;
  20. 	}
  21. protected:
  22. 	static void call_private_method(Base& base_obj, const string& msg)
  23. 	{
  24. 		base_obj.private_method(msg);
  25. 	}
  26.  
  27. private:
  28. 	const string m_name;
  29. };
  30.  
  31. /// A subclass providing some name.
  32. class Foo : public Base {
  33. public:	
  34. 	explicit Foo()
  35. 		: Base("Foo")
  36. 	{
  37. 	}
  38. };
  39.  
  40. /// Another subclass with another name.
  41. class Bar : public Base {
  42. public:	
  43. 	explicit Bar()
  44. 		: Base("Bar")
  45. 	{
  46. 	}
  47. };
  48.  
  49. /// Subclass that needs to call `private_method' on other subclasses of `Base`
  50. class Accessor : public Base {
  51. public:	
  52. 	explicit Accessor()
  53. 		: Base("Accessor")
  54. 		, m_objs()
  55. 	{
  56. 		m_objs.emplace_back(make_unique<Foo>());
  57. 		m_objs.emplace_back(make_unique<Bar>());
  58. 	}
  59.  
  60. 	void call_em_out()
  61. 	{
  62. 		for(const auto& it : m_objs){
  63. 			call_private_method(*it, "success!");
  64. 		}
  65. 	}
  66.  
  67. private:
  68. 	vector<unique_ptr<Base>> m_objs;
  69. };
  70.  
  71. int main() {
  72. 	Accessor accessor;
  73. 	accessor.call_em_out();
  74. 	return 0;
  75. }
Success #stdin #stdout 0s 3472KB
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Standard input is empty
stdout
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Private method of Foo called with message: success!
Private method of Bar called with message: success!
https://ideone.com/gnFwdW
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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