(Component) Added clone virtual method

Replaced Component<C>::GetId by GetComponentId<C>()


Former-commit-id: 4fae3f73c7fad0a5c36dae16e49b6f12c8bf6ae2

SDK/include/NDK/Component.inl

@@ -2,11 +2,13 @@
 // This file is part of the "Nazara Development Kit"
 // For conditions of distribution and use, see copyright notice in Prerequesites.hpp
 
+#include <type_traits>
+
 namespace Ndk
 {
 	template<typename ComponentType>
 	Component<ComponentType>::Component() :
-	BaseComponent(GetId())
+	BaseComponent(GetComponentId<ComponentType>())
 	{
 	}
 
@@ -14,7 +16,15 @@ namespace Ndk
 	Component<ComponentType>::~Component() = default;
 
 	template<typename ComponentType>
-	nzUInt32 Component<ComponentType>::GetId()
+	virtual BaseComponent* Component<ComponentType>::Clone() const
+	{
+		static_assert<std::is_trivially_copy_constructible<ComponentType>::value, "ComponentType should be copy-constructible">
+
+		return new ComponentType(static_cast<ComponentType&>(*this));
+	}
+
+	template<typename ComponentType>
+	constexpr nzUInt32 GetComponentId()
 	{
 		return ComponentType::ComponentId;
 	}