bug#65017: 29.1; Byte compiler interaction with cl-lib function objects, removes symbol-function

[Alan Mackenzie]

Hello, Stefan.

On Thu, Aug 03, 2023 at 12:41:55 -0400, Stefan Monnier wrote:
> > cl--label-convert is defined as "Special macro-expander to rename
> > (function F) references in `cl-labels'.".  What does "rename (function
> > F) references" mean?  Is the term "name" in this context defined
> > anywhere?

> `cl--label-convert` is the macro expander for (function F) used inside
> `cl-labels` so that

>     (cl-labels ((my-foo () toto))
>       #'my-foo)

> gets turned into

>     (let ((bar (lambda () toto)))
>       bar)

> So it "renames" (function my-foo) to the corresponding variable `bar`.

> But for most (function BLA) the code should be left as-is, which a macro
> can't do directly, so `cl--labels-convert-cache` is a hack which lets us
> receive a handle to the overall (function BLA) form so we can return it
> as-is rather than having to rebuild a *new* (function BLA) which would
> just make the macro-expander call us right-back.

OK, thanks.

[ .... ]

>         Stefan

-- 
Alan Mackenzie (Nuremberg, Germany).