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Trans-state

Trans-statep

Recognizer for trans-state structures.

Signature
(trans-statep x) → *

Definitions and Theorems

Function: trans-statep

(defun trans-statep (x)
  (declare (xargs :guard t))
  (let ((__function__ 'trans-statep))
    (declare (ignorable __function__))
    (and (mbe :logic (and (alistp x)
                          (equal (strip-cars x) '(tops)))
              :exec (fty::alist-with-carsp x '(tops)))
         (b* ((tops (cdr (std::da-nth 0 x))))
           (toplevel-listp tops)))))

Theorem: consp-when-trans-statep

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