RE: [External] : Regexp for matching (defun lines

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

> > (concat
> >  "^\\s-("
> >  (regexp-opt...)
> >  t)
> >  "\\s-+\\(\\(\\sw\\|\\s_\\)+\\)")
> 
> I see that you use "\\sw".  What is the advantage verses "[[:alnum:]-_]"

No special advantage. You can include any other
chars you want, so you can pick up, e.g.,

(defun foo!@$%^&*+={}/:42<>? ()
  (message "Hello"))

Perfectly legitimate, and none of those chars
even require escaping.

A function name can include ANY chars, including
whitespace and chars that normally have special
meaning for Lisp, but some need to be escaped
in the defun.  If you want to handle such cases,
go for it.

My point was really to point out that there are
many ways to define a function, other than just
`defun'.

> Why do you use the OR "\\|" with "\\s_" ?

Word-syntax chars plus symbol-syntax chars.
But use whatever you like.