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On Oct 8, 2019, at 6:04 AM, Roberto Ierusalimschy <> wrote:

>>> Any function where you have to distinguish between nil and false in the
>>> return value seems a very bad idea. The standard library always avoided
>>> that, and will continue to do so.
>>> -- Roberto
>> next({[false]=true})?
> You are right. This function is in Lua since version 1.0. It probably
> would have a different API today. (It also spoiled the generic for.)
> -- Roberto

What api would you prefer for next? And how did its current api spoil generic for? Thanks.