ttisuserdata      275 lib/lua/lapi.c   return (ttisuserdata(o) || ttislightuserdata(o));
ttisuserdata      344 lib/lua/lgc.c      (ttisuserdata(o) && (!iskey && isfinalized(uvalue(o))));
ttisuserdata       96 lib/lua/lobject.h #define rawuvalue(o)	check_exp(ttisuserdata(o), &(o)->value.gc->u)