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Utilities

String-fix

(string-fix x) is the identity function for strings.

Signature
(string-fix x) → *
Arguments: x — Guard (stringp x).

Note that we leave this function enabled.

Definitions and Theorems

Function: string-fix$inline

(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: stringp-of-string-fix

(defthm stringp-of-string-fix
        (stringp (string-fix x))
        :rule-classes :type-prescription)