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Atc-var-info

Atc-var-infop

Recognizer for atc-var-info structures.

Signature
(atc-var-infop x) → *

Definitions and Theorems

Function: atc-var-infop

(defun atc-var-infop (x)
  (declare (xargs :guard t))
  (let ((__function__ 'atc-var-infop))
    (declare (ignorable __function__))
    (and (mbe :logic (and (alistp x)
                          (equal (strip-cars x)
                                 '(type thm externalp)))
              :exec (fty::alist-with-carsp x '(type thm externalp)))
         (b* ((type (cdr (std::da-nth 0 x)))
              (thm (cdr (std::da-nth 1 x)))
              (externalp (cdr (std::da-nth 2 x))))
           (and (typep type)
                (symbolp thm)
                (booleanp externalp))))))

Theorem: consp-when-atc-var-infop

(defthm consp-when-atc-var-infop
  (implies (atc-var-infop x) (consp x))
  :rule-classes :compound-recognizer)