		Search-engine friendly clone of the ACL2 documentation.

Preprocessor-states

Ppstate->chars-length

Signature
(ppstate->chars-length ppstate) → length
Returns: length — Type (natp length).

Definitions and Theorems

Function: ppstate->chars-length

(defun ppstate->chars-length (ppstate)
  (declare (xargs :stobjs (ppstate)))
  (declare (xargs :guard t))
  (mbe :logic
       (if (ppstatep ppstate)
           (raw-ppstate->chars-length ppstate)
         1)
       :exec (raw-ppstate->chars-length ppstate)))

Theorem: natp-of-ppstate->chars-length

(defthm natp-of-ppstate->chars-length
  (b* ((length (ppstate->chars-length ppstate)))
    (natp length))
  :rule-classes :rewrite)

Theorem: ppstate->chars-length-of-ppstate-fix-ppstate

(defthm ppstate->chars-length-of-ppstate-fix-ppstate
  (equal (ppstate->chars-length (ppstate-fix ppstate))
         (ppstate->chars-length ppstate)))

Theorem: ppstate->chars-length-ppstate-equiv-congruence-on-ppstate

(defthm ppstate->chars-length-ppstate-equiv-congruence-on-ppstate
  (implies (ppstate-equiv ppstate ppstate-equiv)
           (equal (ppstate->chars-length ppstate)
                  (ppstate->chars-length ppstate-equiv)))
  :rule-classes :congruence)