Function: mh-valid-view-change-operation-p

mh-valid-view-change-operation-p is an autoloaded and byte-compiled function defined in mh-seq.el.gz.

Signature

(mh-valid-view-change-operation-p OP)

Documentation

Check if the view change operation can be performed.

OP is one of widen and unthread.

Source Code

;; Defined in /usr/src/emacs/lisp/mh-e/mh-seq.el.gz
;;;###mh-autoload
(defun mh-valid-view-change-operation-p (op)
  "Check if the view change operation can be performed.
OP is one of `widen' and `unthread'."
  (cond ((eq (car mh-view-ops) op)
         (pop mh-view-ops))
        (t nil)))