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Op-pfx-fix

Signature
(op-pfx-fix x) → *
Arguments: x — Guard (op-pfx-p x).

Definitions and Theorems

Function: op-pfx-fix

(defun op-pfx-fix (x)
  (declare (xargs :guard (op-pfx-p x)))
  (let ((__function__ 'op-pfx-fix))
    (declare (ignorable __function__))
    (mbe :logic (if (op-pfx-p x) x 'nil)
         :exec x)))