Sean, > There's also <const> as well. But you can't combine them: Sources say you needn't: https://github.com/lua/lua/blob/d9f40e3f6fb61650240c47d548bee69b24b07859/lparser.c#L1679 > var->ro = 1; /* to-be-closed variables are always read-only */ Supposedly for future extensions several such annotations would be placed inside the angle brackets, comma-separated or something... just guessing. Best regards, -- DoubleF