		Search-engine friendly clone of the ACL2 documentation.

Iconst

Iconstp

Recognizer for iconst structures.

Signature
(iconstp x) → *

Definitions and Theorems

Function: iconstp

(defun iconstp (x)
 (declare (xargs :guard t))
 (let ((__function__ 'iconstp))
  (declare (ignorable __function__))
  (and
   (consp x)
   (eq (car x) :iconst)
   (mbe
       :logic (and (alistp (cdr x))
                   (equal (strip-cars (cdr x))
                          '(value base unsignedp length)))
       :exec (fty::alist-with-carsp (cdr x)
                                    '(value base unsignedp length)))
   (b* ((value (cdr (std::da-nth 0 (cdr x))))
        (base (cdr (std::da-nth 1 (cdr x))))
        (unsignedp (cdr (std::da-nth 2 (cdr x))))
        (length (cdr (std::da-nth 3 (cdr x)))))
     (and (natp value)
          (iconst-basep base)
          (booleanp unsignedp)
          (iconst-lengthp length))))))

Theorem: consp-when-iconstp

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