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Stat

Statp

Recognizer for stat structures.

Signature
(statp x) → *

Definitions and Theorems

Function: statp

(defun statp (x)
 (declare (xargs :guard t))
 (let ((__function__ 'statp))
  (declare (ignorable __function__))
  (and
      (mbe :logic (and (alistp x)
                       (equal (strip-cars x)
                              '(xregs pc memory error)))
           :exec (fty::alist-with-carsp x '(xregs pc memory error)))
      (b* ((?xregs (cdr (std::da-nth 0 x)))
           (acl2::?pc (cdr (std::da-nth 1 x)))
           (memory (cdr (std::da-nth 2 x)))
           (error (cdr (std::da-nth 3 x))))
        (and (ubyte8-listp memory)
             (booleanp error))))))

Theorem: consp-when-statp

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