Re: emacs-25 2460cfa: * doc/lispref/lists.texi (Association Lists): Document 'alist-get'.

[Michael Heerdegen <michael_heerdegen@web.de>]

John Wiegley <jwiegley@gmail.com> writes:

> >> > (defmacro alist-put (key value place &optional default remove)
> >> >   (gv-letplace (_ setter) `(alist-get ,key ,place ,default ,remove)
> >> >     (funcall setter value)))

> I hear you.  For that code above, the comment would be:
>
>     Given an expression -- in this case, `alist-get' applied to the
>     arguments passed to this macro -- find the `setter' that can
>     "modify in place" the object returned by that expression, and
>     immediately use it to replace that object with the value passed by
>     the caller.

Not quite, or at least imprecise: SETTER is a function that is called
with an expression, and returns the code that does what you describe.

Note that there is no backquote used in the above definition of
`alist-put'.

So, strictly speaking, the name "setter" is not 100% correct.


Michael.