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• Port-expressions

Vl-maybe-portexpr-p

Recognizes all expressions that can validly occur in a (possibly blank) port.

Signature

(vl-maybe-portexpr-p x) → okp

Arguments

x — Guard (vl-maybe-expr-p x).

Returns

okp — Type (booleanp okp).

Definitions and Theorems

Function: vl-maybe-portexpr-p

(defun vl-maybe-portexpr-p (x)
  (declare (xargs :guard (vl-maybe-expr-p x)))
  (let ((__function__ 'vl-maybe-portexpr-p))
    (declare (ignorable __function__))
    (b* ((x (vl-maybe-expr-fix x)))
      (or (not x) (vl-portexpr-p x)))))

Theorem: booleanp-of-vl-maybe-portexpr-p

(defthm booleanp-of-vl-maybe-portexpr-p
  (b* ((okp (vl-maybe-portexpr-p x)))
    (booleanp okp))
  :rule-classes :type-prescription)

Theorem: vl-maybe-portexpr-p-when-nonnil

(defthm vl-maybe-portexpr-p-when-nonnil
  (implies x
           (equal (vl-maybe-portexpr-p x)
                  (vl-portexpr-p x))))

Theorem: vl-maybe-portexpr-p-of-vl-maybe-expr-fix-x

(defthm vl-maybe-portexpr-p-of-vl-maybe-expr-fix-x
  (equal (vl-maybe-portexpr-p (vl-maybe-expr-fix x))
         (vl-maybe-portexpr-p x)))

Theorem: vl-maybe-portexpr-p-vl-maybe-expr-equiv-congruence-on-x

(defthm vl-maybe-portexpr-p-vl-maybe-expr-equiv-congruence-on-x
  (implies (vl-maybe-expr-equiv x x-equiv)
           (equal (vl-maybe-portexpr-p x)
                  (vl-maybe-portexpr-p x-equiv)))
  :rule-classes :congruence)