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  1. #include <iostream>
  2. #include <string>
  3. #include <vector>
  4. using namespace std;
  5.  
  6. class YObject {
  7. 	const string m_name;
  8. public:
  9. 	YObject(const string& name) : m_name(name) {}
  10. 	virtual const string& getName() { return m_name; }
  11. };
  12.  
  13. class UIButton : public YObject {
  14. public:
  15. 	UIButton(const string& name) : YObject(name) {}
  16. };
  17.  
  18. class ObjectType : public YObject {
  19. public:
  20. 	ObjectType(const string& name) : YObject(name) {}
  21. };
  22.  
  23. vector<YObject*> foo;
  24.  
  25. template <typename T>
  26. T* object_of() {
  27. 	T* result = nullptr;
  28.  
  29. 	for (auto& i : foo) {
  30. 		T* bar = dynamic_cast<T*>(i);
  31.  
  32. 		if (bar != nullptr) {
  33. 			result = bar;
  34. 		}
  35. 	}
  36. 	return result;
  37. }
  38.  
  39. int main() {
  40. 	foo.push_back(new UIButton("1"));
  41. 	foo.push_back(new ObjectType("2"));
  42. 	foo.push_back(new UIButton("3"));
  43.  
  44. 	cout << object_of<UIButton>()->getName() << endl;
  45. 	cout << object_of<ObjectType>()->getName() << endl;
  46.  
  47. 	return 0;
  48. }
Success #stdin #stdout 0s 3464KB
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https://ideone.com/J4oA1j
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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