Continue implementation of Entity::AddComponent()

include/entity.h

@@ -6,7 +6,7 @@
 class Entity {
 public:
   template <typename CompT, typename... Args>
-  CompT *AddComponent(Args &&...args);
+  Component *AddComponent(Args &&...args);
 
   void Init();
   void Draw();

src/entity_i.cpp

@@ -1,3 +1,9 @@
+#pragma once
 #ifndef VOID_ENTITY_H
 #include "../include/entity.h"
 #endif
+
+template <typename CompT, typename... Args>
+Component *Entity::AddComponent(Args &&...args) {
+  return components.emplace_back(std::forward<Args>(args)...);
+}