		Search-engine friendly clone of the ACL2 documentation.

States

Error

Set the error flag in the state.

Signature
(error stat feat) → new-stat
Arguments: stat — Guard (statp stat).; feat — Guard (featp feat).
Returns: new-stat — Type (statp new-stat).

Definitions and Theorems

Function: error

(defun error (stat feat)
  (declare (xargs :guard (and (statp stat) (featp feat))))
  (declare (ignore feat))
  (declare (xargs :guard (stat-validp stat feat)))
  (let ((__function__ 'error))
    (declare (ignorable __function__))
    (change-stat stat :error t)))

Theorem: statp-of-error

(defthm statp-of-error
  (b* ((new-stat (error stat feat)))
    (statp new-stat))
  :rule-classes :rewrite)

Theorem: stat-validp-of-error

(defthm stat-validp-of-error
  (implies (stat-validp stat feat)
           (b* ((?new-stat (error stat feat)))
             (stat-validp new-stat feat))))

Theorem: error-of-stat-fix-stat

(defthm error-of-stat-fix-stat
  (equal (error (stat-fix stat) feat)
         (error stat feat)))

Theorem: error-stat-equiv-congruence-on-stat

(defthm error-stat-equiv-congruence-on-stat
  (implies (stat-equiv stat stat-equiv)
           (equal (error stat feat)
                  (error stat-equiv feat)))
  :rule-classes :congruence)

Theorem: error-of-feat-fix-feat

(defthm error-of-feat-fix-feat
  (equal (error stat (feat-fix feat))
         (error stat feat)))

Theorem: error-feat-equiv-congruence-on-feat

(defthm error-feat-equiv-congruence-on-feat
  (implies (feat-equiv feat feat-equiv)
           (equal (error stat feat)
                  (error stat feat-equiv)))
  :rule-classes :congruence)