RE: [External] : Re: Macro expansion containing ‘interactive’

[Drew Adams <drew.adams@oracle.com>]

> >> In an attempt to create a compatibility wrapper for the new optional mode
> >> list parameter of ‘interactive’ I am facing difficulties. The definition
> >> looks like this:
> >
> > `interactive` is not a special form.  Just like docstrings, it's a part
> > of the syntax of `lambda`, so you need to define a `foo-lambda` if you
> > want it to work reliably.
> 
> Yup.  When doing code that needs to be backwards-compatible here, it's
> better to use a declare form instead:
> 
> (defun foo ()
>   (declare (modes dired-mode))
>   (interactive)
>   ...)

Are you sure that that modes `declare' form is
backward-compatible with, say, Emacs 20?  This
is the only definition of `declare' in Emacs 20,
and it's in `cl-macs.el' - i.e., a (primitive)
emulation of Common Lisp's `declare':

(defmacro declare (&rest specs)
  (if (cl-compiling-file)
      (while specs
	(if (listp cl-declare-stack)
          (cl-push (car specs)
        cl-declare-stack))
	(cl-do-proclaim (cl-pop specs) nil)))
  nil)