1 files changed, 32 insertions, 0 deletions
diff --git a/core/object_id.h b/core/object_id.h
new file mode 100644
index 0000000000..f0ff2a24f5
--- /dev/null
+++ b/core/object_id.h
@@ -0,0 +1,32 @@
+#ifndef OBJECT_ID_H
+#define OBJECT_ID_H
+
+#include "core/typedefs.h"
+
+// Class to store an object ID (int64)
+// needs to be compatile with int64 because this is what Variant uses
+// Also, need to be explicitly only castable to 64 bits integer types
+// to avoid bugs due to loss of precision
+
+class ObjectID {
+	uint64_t id = 0;
+
+public:
+	_ALWAYS_INLINE_ bool is_valid() const { return id != 0; }
+	_ALWAYS_INLINE_ bool is_null() const { return id == 0; }
+	_ALWAYS_INLINE_ operator uint64_t() const { return id; }
+	_ALWAYS_INLINE_ operator int64_t() const { return id; }
+
+	_ALWAYS_INLINE_ bool operator==(const ObjectID &p_id) const { return id == p_id.id; }
+	_ALWAYS_INLINE_ bool operator!=(const ObjectID &p_id) const { return id != p_id.id; }
+	_ALWAYS_INLINE_ bool operator<(const ObjectID &p_id) const { return id < p_id.id; }
+
+	_ALWAYS_INLINE_ void operator=(int64_t p_int64) { id = p_int64; }
+	_ALWAYS_INLINE_ void operator=(uint64_t p_uint64) { id = p_uint64; }
+
+	_ALWAYS_INLINE_ ObjectID() {}
+	_ALWAYS_INLINE_ explicit ObjectID(const uint64_t p_id) { id = p_id; }
+	_ALWAYS_INLINE_ explicit ObjectID(const int64_t p_id) { id = p_id; }
+};
+
+#endif // OBJECT_ID_H