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Screen

Screen->messages

Get the messages field from a screen.

Signature
(screen->messages x) → messages
Arguments: x — Guard (screenp x).
Returns: messages — Type (screen-message-listp messages).

This is an ordinary field accessor created by fty::defprod.

Definitions and Theorems

Function: screen->messages$inline

(defun screen->messages$inline (x)
  (declare (xargs :guard (screenp x)))
  (declare (xargs :guard t))
  (let ((__function__ 'screen->messages))
    (declare (ignorable __function__))
    (mbe :logic
         (b* ((x (and t x)))
           (screen-message-list-fix (cdr (std::da-nth 0 (cdr x)))))
         :exec (cdr (std::da-nth 0 (cdr x))))))

Theorem: screen-message-listp-of-screen->messages

(defthm screen-message-listp-of-screen->messages
  (b* ((messages (screen->messages$inline x)))
    (screen-message-listp messages))
  :rule-classes :rewrite)

Theorem: screen->messages$inline-of-screen-fix-x

(defthm screen->messages$inline-of-screen-fix-x
  (equal (screen->messages$inline (screen-fix x))
         (screen->messages$inline x)))

Theorem: screen->messages$inline-screen-equiv-congruence-on-x

(defthm screen->messages$inline-screen-equiv-congruence-on-x
  (implies (screen-equiv x x-equiv)
           (equal (screen->messages$inline x)
                  (screen->messages$inline x-equiv)))
  :rule-classes :congruence)