(string-fix x) is the identity function for strings.
(string-fix x) → *
Note that we leave this function enabled.
Function:
(defun string-fix$inline (x) (declare (xargs :guard (stringp x))) (let ((__function__ 'string-fix)) (declare (ignorable __function__)) (mbe :logic (str-fix x) :exec x)))
Theorem:
(defthm stringp-of-string-fix (stringp (string-fix x)) :rule-classes :type-prescription)