Move IEventHandler out of Event to allow for forward declaration

openVulkanoCpp/Base/Event.hpp

@@ -8,18 +8,19 @@
 
 namespace openVulkanoCpp
 {
+	class IEventHandler
+	{
+	public:
+		virtual ~IEventHandler() = default;
+		virtual void SetInvalid() = 0;
+	};
+
 	template<typename... Arguments>
 	class Event final
 	{
 	public:
 		typedef std::function<void(Arguments...)> Function;
 
-		class IEventHandler
-		{
-		public:
-			virtual ~IEventHandler() = default;
-			virtual void SetInvalid() = 0;
-		};
 
 	private:
 		enum class EventHandlerType { STATIC, INSTANCED, INSTANCED_SHARED_PTR, INSTANCED_WEAK_PTR, FUNCTIONAL };