Add NewGRFClass helper method for whether class ID is valid (for iteration)

2023-01-03 03:51:40 +00:00
parent 417416d19b
commit 6a7cad1b47
7 changed files with 19 additions and 8 deletions
--- a/src/newgrf_class.h
+++ b/src/newgrf_class.h
@@ -59,6 +59,7 @@ public:
 	static uint GetUIClassCount();
 	static bool HasUIClass();
 	static Tid GetUIClass(uint index);
+	static bool IsClassIDValid(Tid cls_id);
 	static NewGRFClass *Get(Tid cls_id);

 	static const Tspec *GetByGrf(uint32 grfid, byte local_id, int *index);