Re: Advicing the `interactive' form of a command

On Sun, May 03 2026, Stefan Monnier via Users list for the GNU Emacs text editor wrote:
> So if you want to apply the let binding to the interactive spec, you
> can do:
>
>     (advice-add 'switch-to-buffer :before
>       (lambda (&rest _)
>         (interactive
>           (lambda (ispec)
>             (let ((confirm-nonexistent-file-or-buffer t))
>               (advice-eval-interactive-spec ispec))))
>         nil))

Thank you, this answers my questions!  Reading the brief discussion of
advice-eval-interactive-spec (that I had missed previously), I would
not have guessed that the above two nested lambdas can modify the interactive
spec of a command.  Maybe one such example can be added to the elisp manual.