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Tree-utilities

Pass

Fixtype consisting of a single `pass' indicator.

This is used in pass-result to indicate that no error occurred but no other information was produced, other than all the checks passed.

Definitions and Theorems

Function: pass-equiv$inline

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

Theorem: pass-equiv-is-an-equivalence

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

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

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

Theorem: pass-fix-under-pass-equiv

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

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

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

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

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

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

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

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

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

Subtopics

Passp: Recognizer for pass.
Pass-fix: Fixer for pass.