bug#72344: [PATCH] Add a version of cl-once-only which handles lists of forms

[Drew Adams via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>]

> > What does this have to do with Common Lisp or its
> > emulation?
> 
> It is not about emulating Common Lisp, but it makes sense to keep this
> next to `cl-once-only' as it is a variation of it.
> 
> > We shouldn't have _any_ functions, vars, macros, ...
> > whose names use the prefix `cl-' (and not `cl--').
> > It's really unfortunate that we still do have some.
> 
> I assume you mean that the `cl-' prefix should only be for names which
> exist in Common Lisp, and while I am sympathetic towards that opinion
> `cl-once-only' and `cl-with-gensyms' are macros which are firmly(?)
> embedded in cl-lib.

Yes, my plaint is also for `cl-once-only' and the like.

Firmly?  Those were both just added by Someone(TM)
in Emacs 29 - after _decades_ of Elisp CL emulation.

The original direction/intent of that emulation is
running down the drain - first a drip drip, then a
trickle, soon a steady stream...  Might as well use
prefix `xl-' or `xxl-'.

> The only other place where they would make sense,
> as far as I am aware, is subr or subr-x, but I am not particularly
> interested in making and defending the argument that they should be
> moved there.

As I said, it would be fine to use `cl--' as the
prefix, indicating that it's in some sense "internal".
In this case, at least in the sense that it doesn't
emulate any CL construct.

As I said, just one opinion.  Those who don't care
whether users can tell what's intended to emulate
CL, and what's not, won't agree.

What's not CL emulation is (1) just "plumbing" for
some actual emulation or (2) unrelated stuff that
Someone(TM) thought was clever to add.  Too bad.