1 files changed, 7 insertions, 0 deletions
diff --git a/src/crepe/types.h b/src/crepe/types.h
index 0d459e8..86730cc 100644
--- a/src/crepe/types.h
+++ b/src/crepe/types.h
@@ -1,9 +1,16 @@
 #pragma once
 
 #include <cstdint>
+#include <vector>
+#include <functional>
 
 namespace crepe {
 
+//! GameObject ID
 typedef uint32_t game_object_id_t;
 
+//! vector of reference_wrapper
+template <typename T>
+using RefVector = std::vector<std::reference_wrapper<T>>;
+
 }