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Iconst-base

Iconst-basep

Recognizer for iconst-base structures.

Signature
(iconst-basep x) → *

Definitions and Theorems

Function: iconst-basep

(defun iconst-basep (x)
  (declare (xargs :guard t))
  (let ((__function__ 'iconst-basep))
    (declare (ignorable __function__))
    (and (consp x)
         (cond ((or (atom x) (eq (car x) :dec))
                (and (true-listp (cdr x))
                     (eql (len (cdr x)) 0)
                     (b* nil t)))
               ((eq (car x) :oct)
                (and (true-listp (cdr x))
                     (eql (len (cdr x)) 0)
                     (b* nil t)))
               (t (and (eq (car x) :hex)
                       (and (true-listp (cdr x))
                            (eql (len (cdr x)) 0))
                       (b* nil t)))))))

Theorem: consp-when-iconst-basep

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