bug#63513: [PATCH] Make persist-defvar work with records and hash tables

[Ihor Radchenko]

Joseph Turner <joseph@breatheoutbreathe.in> writes:

>> Then, wouldn't it be better to contribute this function to compat.el and
>> use it from there?
>
> The new behavior of copy-tree has already been added to compat.el:
>
> https://github.com/emacs-compat/compat/pull/25
>
> However, that change currently only exists in compat's emacs-30 branch.

I see.

> I did not know if it was acceptable for persist.el to require compat
> when I wrote these patches. If we agree that it is acceptable, then I'm
> happy to submit a patch to replace (persist-copy-tree ...) with
> (compat-call copy-tree ...), but we'll have to wait to apply the patch
> until after the compat.el emacs-30 branch is merged into master.

AFAIU, the recommended way to implement compat function definitions that
are not yet added to compat.el is using `compat-defun' + `compat-call'.
Then, one can simply drop `compat-defun' after the function is finally
release with compat.el without touching the rest of the code.

CCing Daniel.

-- 
Ihor Radchenko // yantar92,
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