Re: The problem with or and false
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- Subject: Re: The problem with or and false
- From: "Alexander Gladysh" <agladysh@...>
- Date: 2006年3月29日 23:15:33 +0400
> > 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.