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Vl-zipinfo

Vl-zipinfo-p

Recognizer for vl-zipinfo structures.

Signature
(vl-zipinfo-p x) → *

Definitions and Theorems

Function: vl-zipinfo-p

(defun vl-zipinfo-p (x)
 (declare (xargs :guard t))
 (let ((__function__ 'vl-zipinfo-p))
  (declare (ignorable __function__))
  (and
    (consp x)
    (eq (car x) :vl-zipinfo)
    (mbe :logic (and (alistp (cdr x))
                     (equal (strip-cars (cdr x))
                            '(filename name syntax date ltime)))
         :exec
         (fty::alist-with-carsp (cdr x)
                                '(filename name syntax date ltime)))
    (b* ((filename (cdr (std::da-nth 0 (cdr x))))
         (name (cdr (std::da-nth 1 (cdr x))))
         (syntax (cdr (std::da-nth 2 (cdr x))))
         (date (cdr (std::da-nth 3 (cdr x))))
         (ltime (cdr (std::da-nth 4 (cdr x)))))
      (and (stringp filename)
           (stringp name)
           (stringp syntax)
           (stringp date)
           (natp ltime))))))

Theorem: consp-when-vl-zipinfo-p

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