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Re: Why is FUNC in cl-callf not allowed to be an expression?


From: Michael Heerdegen
Subject: Re: Why is FUNC in cl-callf not allowed to be an expression?
Date: Fri, 10 May 2019 13:32:53 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux)

Stefan Monnier <address@hidden> writes:

> > (defmacro gv-callf (call &optional n)
> >   (gv-letplace (_getter setter) (nth (or n 1) call)
> >     (funcall setter call)))
>
> It's cute, tho I'm not too fond of specifying the place via a number,
> personally,

[I should use GETTER btw for more efficient code:

(defmacro gv-callf (call &optional n)
  (unless n (setq n 1))
  (gv-letplace (getter setter) (nth n call)
    (setf (nth n call) getter)
    (funcall setter call)))
]

Yes, but still better than having it as part of the macro name as in
cl-callf2... I don't have any better idea currently.  We could still
extend cl-callf however.


Michael.



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