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Stripping-functions

Vl-maybe-rhs-strip

Signature
(vl-maybe-rhs-strip x) → new-x
Arguments: x — Guard (vl-maybe-rhs-p x).
Returns: new-x — Type (vl-maybe-rhs-p new-x).

Definitions and Theorems

Function: vl-maybe-rhs-strip

(defun vl-maybe-rhs-strip (x)
 (declare (xargs :guard (vl-maybe-rhs-p x)))
 (let ((__function__ 'vl-maybe-rhs-strip))
   (declare (ignorable __function__))
   (vl-maybe-rhs-case x :none
                      (b* nil (change-vl-maybe-rhs-none x))
                      :some
                      (b* ((fty::val (vl-rhs-strip x.val)))
                        (change-vl-maybe-rhs-some x
                                                  :val fty::val)))))

Theorem: vl-maybe-rhs-p-of-vl-maybe-rhs-strip

(defthm vl-maybe-rhs-p-of-vl-maybe-rhs-strip
  (b* ((new-x (vl-maybe-rhs-strip x)))
    (vl-maybe-rhs-p new-x))
  :rule-classes :rewrite)

Theorem: vl-maybe-rhs-strip-of-vl-maybe-rhs-fix-x

(defthm vl-maybe-rhs-strip-of-vl-maybe-rhs-fix-x
  (equal (vl-maybe-rhs-strip (vl-maybe-rhs-fix x))
         (vl-maybe-rhs-strip x)))

Theorem: vl-maybe-rhs-strip-vl-maybe-rhs-equiv-congruence-on-x

(defthm vl-maybe-rhs-strip-vl-maybe-rhs-equiv-congruence-on-x
  (implies (vl-maybe-rhs-equiv x x-equiv)
           (equal (vl-maybe-rhs-strip x)
                  (vl-maybe-rhs-strip x-equiv)))
  :rule-classes :congruence)