Re: Default lexical-binding to t

[Stefan Kangas <stefankangas@gmail.com>]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Stefan Kangas <stefankangas@gmail.com>
>> Date: Fri, 8 Nov 2024 00:38:08 +0000
>> Cc: Joost Kremers <joostkremers@fastmail.fm>, emacs-devel@gnu.org
>>
>> Christopher Howard <christopher@librehacker.com> writes:
>>
>> > Hi, I just wanted to mention one little thing (feature request?): I
>> > noticed that, if I include this
>> >
>> > ``` ;;; ...  -*- lexical-binding: nil -*- ```
>> >
>> > in order to purposefully set the lexical-binding to dynamic — I'm a
>> > rebel, I guess — then the mode-line still gives the "/d" a warning
>> > face. In my theme, that shows up as bright red. But if I set it to "t"
>> > instead, then I get a "/l" without a warning color. I don't see why,
>> > if I purposely chose dynamic binding, that Emacs should treat it as a
>> > bad thing which I need to be warned about.
>>
>> Yes, that is on purpose.  See (info "(elisp) Coding Conventions"):
>>
>>    • We recommend enabling ‘lexical-binding’ in new code, and converting
>>      existing Emacs Lisp code to enable ‘lexical-binding’ if it doesn't
>>      already.  *Note Selecting Lisp Dialect::.
>
> I don't think this justifies nagging a user who explicitly wants some
> file(s) to be treated as using dynamic binding.  The above is just a
> recommendation, not a hard requirement.

I don't consider this as much more than a gentle nudge and reminder.
The mode line indicator has been with us for a few releases already, and
I personally don't see compelling reasons to change that decision now.