Re: Arbitrary function: find the number(s) of expected arguments

[Michael Heerdegen]

Eli Zaretskii <address@hidden> writes:

> I disagree with this conclusion.  The fact is that the Emacs Lisp
> interpreter does know how to produce a clear answer.

Imagine `f' accepts, say, three arguments.  Now, let's

(advice-add 'f :around
            (defun my-f-around-advice (orig-f &rest args)
              (let ((some-value (g args)))
                (if (function-p (car-safe some-value))
                    (apply (car some-value) (cdr some-value))
                  (if (h args)
                      (k args)
                    (apply orig-f some-value))))))

What should (function-arity #'f) return?


Michael.