Re: Lua 5.4.0 (work1), undef and metatable

["Soni \"They/Them\" L." <fakedme@...>]

On 2018-03-14 11:35 AM, Roberto Ierusalimschy wrote:
> > 2018-03-14 12:43 GMT+03:00 Daurnimator <quae@daurnimator.com>:
> > > On 14 March 2018 at 20:38, Sergey Zakharchenko <doublef.mobile@gmail.com> wrote:
> > > > No metamethod calls occur for the undef assignment and check. This
> > > > doesn't seem right.
> > > I think I saw a __undef introduced?
> > How would the supposed backwards compatibility be kept if existing
> > code doesn't define __undef/__isdef?
> You are right. We still do not get full backwards compatibility, because
> of metamethods. We will try to correct it.

For __newindex = check if select("#", ...) == 2 instead of == 3

For __index = check if select("#", __index()) == 0 instead of == 1?

That keeps backwards compatibility, kinda.

> -- Roberto

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