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Name

Namep

Recognizer for name structures.

Signature
(namep x) → *

Definitions and Theorems

Function: namep

(defun namep (x)
  (declare (xargs :guard t))
  (let ((__function__ 'namep))
    (declare (ignorable __function__))
    (and (consp x)
         (cond ((or (atom x) (eq (car x) :simple))
                (and (true-listp (cdr x))
                     (eql (len (cdr x)) 1)
                     (b* ((string (std::da-nth 0 (cdr x))))
                       (stringp string))))
               (t (and (eq (car x) :indexed)
                       (and (true-listp (cdr x))
                            (eql (len (cdr x)) 2))
                       (b* ((string (std::da-nth 0 (cdr x)))
                            (index (std::da-nth 1 (cdr x))))
                         (and (stringp string)
                              (natp index)))))))))

Theorem: consp-when-namep

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