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

[Heime <heimeborgia@protonmail.com>]

On Thursday, August 1st, 2024 at 9:02 AM, Drew Adams <drew.adams@oracle.com> wrote:

> > > (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.

Looked into the Elisp Ref Manual and could not find a description of \s_