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Var-info

Var-infop

Recognizer for var-info structures.

Signature
(var-infop x) → *

Definitions and Theorems

Function: var-infop

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

Theorem: consp-when-var-infop

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