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    • Api

    Api-fix

    Fixing function for api structures.

    Signature
    (api-fix x) → new-x
    Arguments
    x — Guard (apip x).
    Returns
    new-x — Type (apip new-x).

    Definitions and Theorems

    Function: api-fix$inline

    (defun api-fix$inline (x)
     (declare (xargs :guard (apip x)))
     (let ((__function__ 'api-fix))
      (declare (ignorable __function__))
      (mbe
         :logic
         (b* ((inputs (funparam-list-fix (cdr (std::da-nth 0 (cdr x)))))
              (output (type-fix (cdr (std::da-nth 1 (cdr x))))))
           (cons :api (list (cons 'inputs inputs)
                            (cons 'output output))))
         :exec x)))

    Theorem: apip-of-api-fix

    (defthm apip-of-api-fix
      (b* ((new-x (api-fix$inline x)))
        (apip new-x))
      :rule-classes :rewrite)

    Theorem: api-fix-when-apip

    (defthm api-fix-when-apip
      (implies (apip x)
               (equal (api-fix x) x)))

    Function: api-equiv$inline

    (defun api-equiv$inline (acl2::x acl2::y)
      (declare (xargs :guard (and (apip acl2::x) (apip acl2::y))))
      (equal (api-fix acl2::x)
             (api-fix acl2::y)))

    Theorem: api-equiv-is-an-equivalence

    (defthm api-equiv-is-an-equivalence
      (and (booleanp (api-equiv x y))
           (api-equiv x x)
           (implies (api-equiv x y)
                    (api-equiv y x))
           (implies (and (api-equiv x y) (api-equiv y z))
                    (api-equiv x z)))
      :rule-classes (:equivalence))

    Theorem: api-equiv-implies-equal-api-fix-1

    (defthm api-equiv-implies-equal-api-fix-1
      (implies (api-equiv acl2::x x-equiv)
               (equal (api-fix acl2::x)
                      (api-fix x-equiv)))
      :rule-classes (:congruence))

    Theorem: api-fix-under-api-equiv

    (defthm api-fix-under-api-equiv
      (api-equiv (api-fix acl2::x) acl2::x)
      :rule-classes (:rewrite :rewrite-quoted-constant))

    Theorem: equal-of-api-fix-1-forward-to-api-equiv

    (defthm equal-of-api-fix-1-forward-to-api-equiv
      (implies (equal (api-fix acl2::x) acl2::y)
               (api-equiv acl2::x acl2::y))
      :rule-classes :forward-chaining)

    Theorem: equal-of-api-fix-2-forward-to-api-equiv

    (defthm equal-of-api-fix-2-forward-to-api-equiv
      (implies (equal acl2::x (api-fix acl2::y))
               (api-equiv acl2::x acl2::y))
      :rule-classes :forward-chaining)

    Theorem: api-equiv-of-api-fix-1-forward

    (defthm api-equiv-of-api-fix-1-forward
      (implies (api-equiv (api-fix acl2::x) acl2::y)
               (api-equiv acl2::x acl2::y))
      :rule-classes :forward-chaining)

    Theorem: api-equiv-of-api-fix-2-forward

    (defthm api-equiv-of-api-fix-2-forward
      (implies (api-equiv acl2::x (api-fix acl2::y))
               (api-equiv acl2::x acl2::y))
      :rule-classes :forward-chaining)