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bug#49163: 28.0.50; Dynbind add-function and lambdas as file vars


From: Stefan Monnier
Subject: bug#49163: 28.0.50; Dynbind add-function and lambdas as file vars
Date: Sun, 27 Jun 2021 18:18:14 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux)

>> -     (save-excursion (eval val)))
>> +     (save-excursion (eval val t)))
> I would certainly welcome that.

Pushed.  I understand it doesn't directly satisfies your original
request, but that seems harder to do.

This said, technically you *can* get exactly what you asked for with
something like:

    Local Variables:
    my-do-with-test-process-fun: #[257 
"\300\301\^B\302\303\^B\"\302\304\^C\"B\262\^A\305\306$\207" 
[advice--add-function :before make-closure #[0 "\301\300!\207" [V0 
process-sentinel] 2] #[257 "\301\300\^B\"\207" [V0 set-process-sentinel] 4 
"\n\n(fn GV--VAL)"] #[128 "\300\301!\207" [message "Test"] 3 "\n\n(fn &rest 
_)"] nil] 8 "\n\n(fn P)"]
    End:

which you can generate with:

    M-: (let ((lexical-binding t) (print-escape-newlines t)) (insert (format 
"%S" (byte-compile '(lambda (p) (add-function :before (process-sentinel p) 
(lambda (&rest _) (message "Test"))))))))

I wouldn't encourage you to do that, tho.


        Stefan






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