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    • Vars+modes

    Vars+modes-fix

    Fixing function for vars+modes structures.

    Signature
    (vars+modes-fix x) → new-x
    Arguments
    x — Guard (vars+modes-p x).
    Returns
    new-x — Type (vars+modes-p new-x).

    Definitions and Theorems

    Function: vars+modes-fix$inline

    (defun vars+modes-fix$inline (x)
     (declare (xargs :guard (vars+modes-p x)))
     (let ((__function__ 'vars+modes-fix))
      (declare (ignorable __function__))
      (mbe
          :logic
          (b* ((vars (identifier-set-fix (cdr (std::da-nth 0 (cdr x)))))
               (modes (mode-set-fix (cdr (std::da-nth 1 (cdr x))))))
            (cons :vars+modes (list (cons 'vars vars)
                                    (cons 'modes modes))))
          :exec x)))

    Theorem: vars+modes-p-of-vars+modes-fix

    (defthm vars+modes-p-of-vars+modes-fix
      (b* ((new-x (vars+modes-fix$inline x)))
        (vars+modes-p new-x))
      :rule-classes :rewrite)

    Theorem: vars+modes-fix-when-vars+modes-p

    (defthm vars+modes-fix-when-vars+modes-p
      (implies (vars+modes-p x)
               (equal (vars+modes-fix x) x)))

    Function: vars+modes-equiv$inline

    (defun vars+modes-equiv$inline (acl2::x acl2::y)
      (declare (xargs :guard (and (vars+modes-p acl2::x)
                                  (vars+modes-p acl2::y))))
      (equal (vars+modes-fix acl2::x)
             (vars+modes-fix acl2::y)))

    Theorem: vars+modes-equiv-is-an-equivalence

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

    Theorem: vars+modes-equiv-implies-equal-vars+modes-fix-1

    (defthm vars+modes-equiv-implies-equal-vars+modes-fix-1
      (implies (vars+modes-equiv acl2::x x-equiv)
               (equal (vars+modes-fix acl2::x)
                      (vars+modes-fix x-equiv)))
      :rule-classes (:congruence))

    Theorem: vars+modes-fix-under-vars+modes-equiv

    (defthm vars+modes-fix-under-vars+modes-equiv
      (vars+modes-equiv (vars+modes-fix acl2::x)
                        acl2::x)
      :rule-classes (:rewrite :rewrite-quoted-constant))

    Theorem: equal-of-vars+modes-fix-1-forward-to-vars+modes-equiv

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

    Theorem: equal-of-vars+modes-fix-2-forward-to-vars+modes-equiv

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

    Theorem: vars+modes-equiv-of-vars+modes-fix-1-forward

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

    Theorem: vars+modes-equiv-of-vars+modes-fix-2-forward

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