resource class vs struct definition

src/entt/resource/fwd.hpp

@@ -4,7 +4,7 @@
 namespace entt {
 
 template<typename>
-struct resource_cache;
+class resource_cache;
 
 template<typename>
 class resource_handle;

src/entt/resource/loader.hpp

@@ -42,7 +42,7 @@ template<typename Loader, typename Resource>
 class resource_loader {
     /*! @brief Resource loaders are friends of their caches. */
     template<typename Other>
-    friend struct resource_cache;
+    friend class resource_cache;
 
     /**
      * @brief Loads the resource and returns it.