		Search-engine friendly clone of the ACL2 documentation.

Word-fix

Fixer for word.

Function: word-fix

(defun word-fix (x)
  (declare (xargs :guard (wordp x)))
  (mbe :logic (if (wordp x) x 0) :exec x))

Theorem: wordp-of-word-fix

(defthm wordp-of-word-fix
  (b* ((fixed-x (word-fix x)))
    (wordp fixed-x))
  :rule-classes :rewrite)

Theorem: word-fix-when-wordp

(defthm word-fix-when-wordp
  (implies (wordp x)
           (equal (word-fix x) x)))