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Preprocessor-states

Ppstate->chars-unread

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

Definitions and Theorems

Function: ppstate->chars-unread

(defun ppstate->chars-unread (ppstate)
  (declare (xargs :stobjs (ppstate)))
  (declare (xargs :guard t))
  (mbe :logic
       (if (ppstatep ppstate)
           (raw-ppstate->chars-unread ppstate)
         0)
       :exec (raw-ppstate->chars-unread ppstate)))

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

(defthm natp-of-ppstate->chars-unread
  (b* ((chars-unread (ppstate->chars-unread ppstate)))
    (natp chars-unread))
  :rule-classes (:rewrite :type-prescription))

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

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

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

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