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Origexprs

Vl-nonatom->original-operator

Get the original operator from a non-atomic expression.

Signature
(vl-nonatom->original-operator x) → op
Arguments: x — Guard (vl-expr-p x).
Returns: op — Type (vl-op-p op).

Definitions and Theorems

Function: vl-nonatom->original-operator

(defun vl-nonatom->original-operator (x)
  (declare (xargs :guard (vl-expr-p x)))
  (declare (xargs :guard (not (vl-atom-p x))))
  (let ((__function__ 'vl-nonatom->original-operator))
    (declare (ignorable __function__))
    (b* ((atts (vl-nonatom->atts x))
         (orig (cdr (hons-assoc-equal "VL_ORIG_EXPR" atts)))
         ((when (and orig (not (vl-fast-atom-p orig))))
          (vl-nonatom->op orig)))
      (vl-nonatom->op x))))

Theorem: vl-op-p-of-vl-nonatom->original-operator

(defthm vl-op-p-of-vl-nonatom->original-operator
  (b* ((op (vl-nonatom->original-operator x)))
    (vl-op-p op))
  :rule-classes :rewrite)

Theorem: vl-nonatom->original-operator-of-vl-expr-fix-x

(defthm vl-nonatom->original-operator-of-vl-expr-fix-x
  (equal (vl-nonatom->original-operator (vl-expr-fix x))
         (vl-nonatom->original-operator x)))

Theorem: vl-nonatom->original-operator-vl-expr-equiv-congruence-on-x

(defthm vl-nonatom->original-operator-vl-expr-equiv-congruence-on-x
  (implies (vl-expr-equiv x x-equiv)
           (equal (vl-nonatom->original-operator x)
                  (vl-nonatom->original-operator x-equiv)))
  :rule-classes :congruence)