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  1. #include <iostream>
  2. #include <unordered_map>
  3. #include <string>
  4.  
  5. class Component
  6. {
  7. public:
  8. 	virtual Component* Clone() const = 0;
  9. 	virtual std::string ComponentType() const = 0;
  10. };
  11.  
  12. class Player : public Component
  13. {
  14. public:
  15. 	Component* Clone() const
  16. 	{
  17. 		return new Player(*this);
  18. 	}
  19.  
  20.  	std::string ComponentType() const
  21. 	{
  22. 		return "PlayerComponent";
  23. 	}
  24. };
  25.  
  26. class GameObject : public Component
  27. {
  28. public:
  29. 	Component* Clone() const
  30. 	{
  31. 		return new GameObject(*this);
  32. 	}
  33.  
  34. 	std::string ComponentType() const
  35. 	{
  36. 		return "GameObjectComponent";
  37. 	}
  38. };
  39.  
  40. class SomeContainer
  41. {
  42. private:
  43. 	std::unordered_map<std::string, Component*> m_components;
  44.  
  45. public:	
  46. 	void AddComponent(Component* theComponent)
  47. 	{
  48. 		if (m_components.find(theComponent->ComponentType()) == m_components.end())
  49. 		{
  50. 			m_components.insert(std::make_pair(theComponent->ComponentType(), theComponent));
  51. 		}
  52. 		else
  53. 		{
  54. 			std::cout << "I didn't add this " << theComponent->ComponentType();
  55. 			std::cout << " as I already have one" << std::endl;
  56. 		}
  57. 	}
  58. };
  59.  
  60. int main() 
  61. {
  62. 	auto someContainer = SomeContainer();
  63. 	auto aPlayer = new Player();
  64.  
  65. 	someContainer.AddComponent(aPlayer);
  66. 	someContainer.AddComponent(new GameObject());
  67. 	someContainer.AddComponent(aPlayer->Clone());
  68.  
  69. 	return 0;
  70. }
Success #stdin #stdout 0s 3460KB
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Standard input is empty
stdout
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I didn't add this PlayerComponent as I already have one
https://ideone.com/YZpJvW
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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