Re: Most of Elisp lacks lexical-binding: t

[Phillip Lord]

Stefan Monnier <address@hidden> writes:

>> My feeling is that most files could just be changed without problems,
>> but there will be enough exceptions that it needs to be done carefully.
>
> FWIW, my local Emacs build is hacked so that it always compiles with
> lexical-binding enabled.  In practice, it seems that most packages work
> just fine with it, but there are indeed very definite exceptions, and
> even for those packages that appear to work, the change may introduce
> subtle regressions.
>
> So, yes, it has to be done "by hand" and takes time.  Help is
> most welcome.  The best is to do it with the packages that you use, so
> you can more easily test the result.


The question is, though, at what point does it become the default?

One answer would be, support a "dynamic-binding" cookie line for
Emacs-27 (which does nothing by default), incorporate your
lexical-binding hack as an option. Then, go to lexical by default for
Emacs-28.

Phil