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Re: Arbitrary function: find the number(s) of expected arguments
From: |
Michael Heerdegen |
Subject: |
Re: Arbitrary function: find the number(s) of expected arguments |
Date: |
Sat, 19 Mar 2016 18:59:14 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/25.0.92 (gnu/linux) |
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?
>
> How is that relevant to the cited text?
I had concluded that it is not possible to implement `function-arity' so
that it will always give a meaningful return value. You disagreed
(that's the cited text), so I tried to give an example proving my
conclusion. What did I miss?
Michael.
- Re: Arbitrary function: find the number(s) of expected arguments, (continued)
- Re: Arbitrary function: find the number(s) of expected arguments, Eli Zaretskii, 2016/03/19
- Re: Arbitrary function: find the number(s) of expected arguments, Paul Pogonyshev, 2016/03/19
- Re: Arbitrary function: find the number(s) of expected arguments, Michael Heerdegen, 2016/03/19
- Re: Arbitrary function: find the number(s) of expected arguments, Eli Zaretskii, 2016/03/19
- Re: Arbitrary function: find the number(s) of expected arguments, Michael Heerdegen, 2016/03/19
- Re: Arbitrary function: find the number(s) of expected arguments, Eli Zaretskii, 2016/03/19
- Re: Arbitrary function: find the number(s) of expected arguments, Michael Heerdegen, 2016/03/19
- Re: Arbitrary function: find the number(s) of expected arguments, Eli Zaretskii, 2016/03/19
- Re: Arbitrary function: find the number(s) of expected arguments, Michael Heerdegen, 2016/03/19
- Re: Arbitrary function: find the number(s) of expected arguments, Eli Zaretskii, 2016/03/19
- Re: Arbitrary function: find the number(s) of expected arguments,
Michael Heerdegen <=
- Re: Arbitrary function: find the number(s) of expected arguments, Eli Zaretskii, 2016/03/19
- Re: Arbitrary function: find the number(s) of expected arguments, Philipp Stephani, 2016/03/19
- Re: Arbitrary function: find the number(s) of expected arguments, Michael Heerdegen, 2016/03/19
- Re: Arbitrary function: find the number(s) of expected arguments, Eli Zaretskii, 2016/03/19
- Re: Arbitrary function: find the number(s) of expected arguments, Philipp Stephani, 2016/03/19
- Re: Arbitrary function: find the number(s) of expected arguments, Eli Zaretskii, 2016/03/19
- Re: Arbitrary function: find the number(s) of expected arguments, Philipp Stephani, 2016/03/19
- Re: Arbitrary function: find the number(s) of expected arguments, Philipp Stephani, 2016/03/19
- Re: Arbitrary function: find the number(s) of expected arguments, Eli Zaretskii, 2016/03/19
- Re: Arbitrary function: find the number(s) of expected arguments, Philipp Stephani, 2016/03/19