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• Vl-printedlist

Vl-printed-p

Recognize a printed object (string or character).

Signature

(vl-printed-p x) → *

Definitions and Theorems

Function: vl-printed-p

(defun vl-printed-p (x)
  (declare (xargs :guard t))
  (let ((__function__ 'vl-printed-p))
    (declare (ignorable __function__))
    (or (characterp x) (stringp x))))

Theorem: vl-printed-p-cr

(defthm vl-printed-p-cr
  (equal (vl-printed-p x)
         (or (characterp x) (stringp x)))
  :rule-classes :compound-recognizer)

Theorem: vl-printed-p-by-backchaining

(defthm vl-printed-p-by-backchaining
  (implies (or (characterp x) (stringp x))
           (vl-printed-p x)))

Subtopics

Vl-printed-fix

Fixing function for vl-printed-p objects.