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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 (true-listp x)
         (eql (len x) 2)
         (b* ((name (std::da-nth 0 x))
              (imports (std::da-nth 1 x)))
           (and (stringp name)
                (symbol-value-listp imports))))))

Theorem: consp-when-packagep

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