Expand description
Tag methods (metamethods) — ported from ltm.c / ltm.h.
Every metamethod name (__index, __add, …) is interned on GlobalState
during init(). Lookup helpers (get_tm, get_tm_by_obj) return
LuaValue::Nil when no metamethod is present; callers check with
value.is_nil() (the notm macro in C).