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• Sbitsets

Sbitset-fix

(sbitset-fix x) is a basic fixing function for sparse bitsets.

Signature

(sbitset-fix x) → *

Arguments

x — Guard (sbitsetp x).

Definitions and Theorems

Function: sbitset-fix$inline

(defun acl2::sbitset-fix$inline (x)
  (declare (xargs :guard (sbitsetp x)))
  (let ((__function__ 'sbitset-fix))
    (declare (ignorable __function__))
    (mbe :logic (if (sbitsetp x) x nil)
         :exec x)))

Theorem: true-listp-of-sbitset-fix

(defthm true-listp-of-sbitset-fix
  (true-listp (sbitset-fix x))
  :rule-classes :type-prescription)

Theorem: sbitsetp-of-sbitset-fix

(defthm sbitsetp-of-sbitset-fix
  (sbitsetp (sbitset-fix x)))

Theorem: sbitset-fix-when-sbitsetp

(defthm sbitset-fix-when-sbitsetp
  (implies (sbitsetp x)
           (equal (sbitset-fix x) x)))