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Event-macros

Restore-output?

Conditionally wrap an event form to have it produce screen output according to previously saved screen output settings.

Signature
(restore-output? yes/no event) → new-event
Arguments: yes/no — Guard (booleanp yes/no).; event — Guard (pseudo-event-formp event).
Returns: new-event — Type (pseudo-event-formp new-event), given (pseudo-event-formp event).

This leaves the form unchanged if the boolean is nil, otherwise it calls restore-output on it.

Definitions and Theorems

Function: restore-output?

(defun restore-output? (yes/no event)
  (declare (xargs :guard (and (booleanp yes/no)
                              (pseudo-event-formp event))))
  (let ((__function__ 'restore-output?))
    (declare (ignorable __function__))
    (if yes/no (restore-output event)
      event)))

Theorem: pseudo-event-formp-of-restore-output?

(defthm pseudo-event-formp-of-restore-output?
  (implies (pseudo-event-formp event)
           (b* ((new-event (restore-output? yes/no event)))
             (pseudo-event-formp new-event)))
  :rule-classes :rewrite)