		Search-engine friendly clone of the ACL2 documentation.

Double-value

Double-valuep

Recognizer for double-value structures.

Signature
(double-valuep x) → *

Definitions and Theorems

Function: double-valuep

(defun double-valuep (x)
  (declare (xargs :guard t))
  (let ((__function__ 'double-valuep))
    (declare (ignorable __function__))
    (and (consp x)
         (eq (car x) :double)
         (true-listp (cdr x))
         (eql (len (cdr x)) 1)
         (b* ((double (std::da-nth 0 (cdr x))))
           (double-value-abs-p double)))))

Theorem: consp-when-double-valuep

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