RE: bug#4004: filename completion

[Drew Adams]

> > Yes, I mean that. My version avoids compiler warnings for unknown
> > symbol completion-styles, when Tramp runs outside GNU Emacs 23.
> 
> The byte-compiler is smart enough to recognize this situation 
> and avoid warning about it.

I think Michael was speaking about byte-compiling using other that GNU Emacs 23.

Here's what GNU Emacs 20 says, for instance:

(defun foo ()
  (and (boundp 'completion-styles)
       (member 'partial-completion completion-styles)))
(byte-compile 'foo)

** reference to free variable completion-styles