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Matchstate

Matchstate-p

Recognizer for matchstate structures.

Signature
(matchstate-p x) → *

Definitions and Theorems

Function: matchstate-p

(defun matchstate-p (x)
  (declare (xargs :guard t))
  (let ((__function__ 'matchstate-p))
    (declare (ignorable __function__))
    (and (std::prod-consp x)
         (b* ((index (std::prod-car x))
              (backrefs (std::prod-cdr x)))
           (and (natp index)
                (backref-alist-p backrefs))))))

Theorem: consp-when-matchstate-p

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