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

[Stefan Monnier]

> Now that I look at it again, I guess an "anamorphic" version would be
> probably more obvious:
>
>     (gv-modify (nth i l)
>        (append head it (cdr x)))

And I see it solves another downside of (gv-callf N EXP), which is that in

    (gv-callf 2 (append HEAD (nth INDEX LIST) TAIL))
    
the evaluation order will actually end up being

    INDEX; LIST; HEAD; TAIL
    
which is counter-intuitive.


        Stefan