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• Vl-echarpack-p

Vl-echarpack->col

Signature

(vl-echarpack->col x) → col

Arguments

x — Guard (vl-echarpack-p x).

Returns

col — Type (natp col), given the guard.

Definitions and Theorems

Function: vl-echarpack->col$inline

(defun vl-echarpack->col$inline (x)
  (declare (xargs :guard (vl-echarpack-p x)))
  (let ((__function__ 'vl-echarpack->col))
    (declare (ignorable __function__))
    (if (consp x)
        (the (integer 0 *) (cdar x))
      (the (unsigned-byte 60)
           (logand (the (unsigned-byte 22)
                        (1- (expt 2 22)))
                   (the (unsigned-byte 52)
                        (ash (the (unsigned-byte 60) x)
                             -8)))))))

Theorem: natp-of-vl-echarpack->col

(defthm natp-of-vl-echarpack->col
  (implies (and (force (vl-echarpack-p x)))
           (b* ((col (vl-echarpack->col$inline x)))
             (natp col)))
  :rule-classes :type-prescription)

Theorem: vl-echarpack->col-of-vl-echarpack

(defthm vl-echarpack->col-of-vl-echarpack
  (implies (and (force (unsigned-byte-p 8 code))
                (force (natp line))
                (force (natp col)))
           (equal (vl-echarpack->col (vl-echarpack code line col))
                  col)))