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Header-name

Header-namep

Recognizer for header-name structures.

Signature
(header-namep x) → *

Definitions and Theorems

Function: header-namep

(defun header-namep (x)
  (declare (xargs :guard t))
  (and (consp x)
       (cond ((or (atom x) (eq (car x) :angles))
              (and (b* ((chars (cdr x)))
                     (h-char-listp chars))))
             (t (and (eq (car x) :quotes)
                     (and)
                     (b* ((chars (cdr x)))
                       (q-char-listp chars)))))))

Theorem: consp-when-header-namep

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