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Package

Packagep

Recognizer for package structures.

Signature
(packagep x) → *

Definitions and Theorems

Function: packagep

(defun packagep (x)
  (declare (xargs :guard t))
  (let ((__function__ 'packagep))
    (declare (ignorable __function__))
    (and (consp x)
         (eq (car x) :package)
         (mbe :logic (and (alistp (cdr x))
                          (equal (strip-cars (cdr x)) '(file)))
              :exec (fty::alist-with-carsp (cdr x) '(file)))
         (b* ((file (cdr (std::da-nth 0 (cdr x)))))
           (filep file)))))

Theorem: consp-when-packagep

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