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    • Output-execution

    Eval-output-item

    Evaluate an output item.

    Signature
    (eval-output-item outitem curve) → val
    Arguments
    outitem — Guard (output-itemp outitem).
    curve — Guard (curvep curve).
    Returns
    val — Type (value-resultp val).

    Definitions and Theorems

    Function: eval-output-item

    (defun eval-output-item (outitem curve)
      (declare (xargs :guard (and (output-itemp outitem)
                                  (curvep curve))))
      (let ((__function__ 'eval-output-item))
        (declare (ignorable __function__))
        (eval-output-expression (output-item->get outitem)
                                curve)))

    Theorem: value-resultp-of-eval-output-item

    (defthm value-resultp-of-eval-output-item
      (b* ((val (eval-output-item outitem curve)))
        (value-resultp val))
      :rule-classes :rewrite)

    Theorem: eval-output-item-of-output-item-fix-outitem

    (defthm eval-output-item-of-output-item-fix-outitem
      (equal (eval-output-item (output-item-fix outitem)
                               curve)
             (eval-output-item outitem curve)))

    Theorem: eval-output-item-output-item-equiv-congruence-on-outitem

    (defthm eval-output-item-output-item-equiv-congruence-on-outitem
      (implies (output-item-equiv outitem outitem-equiv)
               (equal (eval-output-item outitem curve)
                      (eval-output-item outitem-equiv curve)))
      :rule-classes :congruence)

    Theorem: eval-output-item-of-curve-fix-curve

    (defthm eval-output-item-of-curve-fix-curve
      (equal (eval-output-item outitem (curve-fix curve))
             (eval-output-item outitem curve)))

    Theorem: eval-output-item-curve-equiv-congruence-on-curve

    (defthm eval-output-item-curve-equiv-congruence-on-curve
      (implies (curve-equiv curve curve-equiv)
               (equal (eval-output-item outitem curve)
                      (eval-output-item outitem curve-equiv)))
      :rule-classes :congruence)