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Lift-info

Lift-infop

Recognizer for lift-info structures.

Signature
(lift-infop x) → *

Definitions and Theorems

Function: lift-infop

(defun lift-infop (x)
  (declare (xargs :guard t))
  (let ((__function__ 'lift-infop))
    (declare (ignorable __function__))
    (and (mbe :logic (and (alistp x)
                          (equal (strip-cars x) '(pred def hyps)))
              :exec (fty::alist-with-carsp x '(pred def hyps)))
         (b* ((pred (cdr (std::da-nth 0 x)))
              (def (cdr (std::da-nth 1 x)))
              (hyps (cdr (std::da-nth 2 x))))
           (and (symbolp pred)
                (definitionp def)
                (true-listp hyps))))))

Theorem: consp-when-lift-infop

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