Function: mh-folder-name-p
mh-folder-name-p is an autoloaded and byte-compiled function defined
in mh-utils.el.gz.
Signature
(mh-folder-name-p NAME)
Documentation
Return non-nil if NAME is the name of a folder.
A name (a string or symbol) can be a folder name if it begins with "+".
Source Code
;; Defined in /usr/src/emacs/lisp/mh-e/mh-utils.el.gz
;;; Folder Utilities
;;;###mh-autoload
(defun mh-folder-name-p (name)
"Return non-nil if NAME is the name of a folder.
A name (a string or symbol) can be a folder name if it begins
with \"+\"."
(if (symbolp name)
(eq (aref (symbol-name name) 0) ?+)
(and (> (length name) 0)
(eq (aref name 0) ?+))))