Re: lexical-binding rationale?

[Glenn Morris]

Dave Abrahams wrote:

> I'm sure this has been discussed to death, so please feel free to
> respond with a link, but... can anyone point me to a rationale for
> dynamically altering such a fundamental language behavior on the basis
> of a variable's value?

It's easy to use on a per-file basis, and in the majority of cases
allows the source to be transparently backwards compatible with
older/other versions of Emacs; so why not. Since it's a fait accompli,
discussing alternative ways it might have been done are only going to be
of academic interest.

I never did get an answer to my question about whether the setting HAS
to go in the first line of the file though. I still don't know.

http://debbugs.gnu.org/cgi/bugreport.cgi?bug=8610#8