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Pretty-printing-implementation

Keyword-fix

Signature
(keyword-fix x) → x-fix
Arguments: x — Guard (keywordp x).
Returns: x-fix — Type (keywordp x-fix).

Definitions and Theorems

Function: keyword-fix

(defun keyword-fix (x)
  (declare (xargs :guard (keywordp x)))
  (let ((acl2::__function__ 'keyword-fix))
    (declare (ignorable acl2::__function__))
    (mbe :logic (if (keywordp x) x :default)
         :exec x)))

Theorem: keywordp-of-keyword-fix

(defthm keywordp-of-keyword-fix
  (b* ((x-fix (keyword-fix x)))
    (keywordp x-fix))
  :rule-classes :rewrite)

Theorem: keyword-fix-when-keywordp

(defthm keyword-fix-when-keywordp
  (implies (keywordp x)
           (equal (keyword-fix x) x)))