Re: Why I leave Lua (Was: Re: [ANN] Lua 5.3.0 (work3) now available)

[Hao Wu <wuhao.wise@...>]

On Wednesday, July 9, 2014, Sean Conner <sean@conman.org> wrote:
> It was thus said that the Great Coroutines once stated:
>
> >
> > Another thing that seemed pretty arbitrary is that __index can be a
> > table.  That table can have a metatable.  But the __index of that
> > table that is the first __index cannot have a metatable.  I just
> > expect things like that to recurse, instead of being a
> > first-level-only trigger.  The same for __newindex.
>
>   Roberto & Co. probably did that to avoid this:
>
>         waiting  = {}
>         longtime = {}
>
>         setmetatable(waiting  , { __index = longtime} )
>         setmetatable(longtime , { __index = waiting } )
>
>         waiting['for'] = 'Godot'

 

It's technically unavoidable but it does have a check to avoid infinite loop in __index

 

>   -spc (But infinite loops are great for producing vast amounts of nothing
>         real quick ... )