Re: The problem with or and false

["Alexander Gladysh" <agladysh@...>]

> > Say, I have three tables, A, B and C. I want user to transparently
> > read from them as from single table, first looking to A, then to B,
> > and then to C, and raising error if there is no requested key.
>
> > Do anyone know more elegant solution?
>
> How about this:
>
>   A= { a=10 }
>   B= { b=20 }
>   C= { c=30 }
>
>   setmetatable(A, { __index=B} )
>   setmetatable(B, { __index=C} )
>   setmetatable(C, { __index=error} )
>
>   print(A.a)
>   print(A.b)
>   print(A.c)
>   print(A.z)

Well, I should apologise, as I forgot to mention that I do not want to
modify metatables of original tables. :(

Thank you,
Alexander.