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Screen-message

Screen-messagep

Recognizer for screen-message structures.

Signature
(screen-messagep x) → *

Definitions and Theorems

Function: screen-messagep

(defun screen-messagep (x)
  (declare (xargs :guard t))
  (let ((__function__ 'screen-messagep))
    (declare (ignorable __function__))
    (and (consp x)
         (cond ((or (atom x) (eq (car x) :error))
                (and (true-listp (cdr x))
                     (eql (len (cdr x)) 2)
                     (b* ((string (std::da-nth 0 (cdr x)))
                          (values (std::da-nth 1 (cdr x))))
                       (and (char-listp string)
                            (value-listp values)))))
               (t (and (eq (car x) :log)
                       (and (true-listp (cdr x))
                            (eql (len (cdr x)) 2))
                       (b* ((string (std::da-nth 0 (cdr x)))
                            (values (std::da-nth 1 (cdr x))))
                         (and (char-listp string)
                              (value-listp values)))))))))

Theorem: consp-when-screen-messagep

(defthm consp-when-screen-messagep
  (implies (screen-messagep x) (consp x))
  :rule-classes :compound-recognizer)