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• Token

Tokenp

Recognizer for token structures.

Signature

(tokenp x) → *

Definitions and Theorems

Function: tokenp

(defun tokenp (x)
  (declare (xargs :guard t))
  (and (consp x)
       (cond ((or (atom x) (eq (car x) :keyword))
              (and (b* ((unwrap (cdr x)))
                     (stringp unwrap))))
             ((eq (car x) :ident)
              (and (b* ((unwrap (cdr x)))
                     (identp unwrap))))
             ((eq (car x) :const)
              (and (b* ((unwrap (cdr x)))
                     (constp unwrap))))
             ((eq (car x) :string)
              (and (b* ((unwrap (cdr x)))
                     (stringlitp unwrap))))
             (t (and (eq (car x) :punctuator)
                     (and)
                     (b* ((unwrap (cdr x)))
                       (stringp unwrap)))))))

Theorem: consp-when-tokenp

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