Function: dired-check-switches
dired-check-switches is a byte-compiled function defined in
dired.el.gz.
Signature
(dired-check-switches SWITCHES SHORT &optional LONG)
Documentation
Return non-nil if the string SWITCHES matches LONG or SHORT format.
Source Code
;; Defined in /usr/src/emacs/lisp/dired.el.gz
(defun dired-check-switches (switches short &optional long)
"Return non-nil if the string SWITCHES matches LONG or SHORT format."
(let (case-fold-search)
(and (stringp switches)
(string-match-p (concat "\\(\\`\\| \\)-[[:alnum:]]*" short
(if long (concat "\\|--" long "\\>") ""))
switches))))