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• Vl-echarpack-p

Vl-echarpack->line

Signature

(vl-echarpack->line x) → line

Arguments

x — Guard (vl-echarpack-p x).

Returns

line — Type (posp line), given the guard.

Definitions and Theorems

Function: vl-echarpack->line$inline

(defun vl-echarpack->line$inline (x)
  (declare (xargs :guard (vl-echarpack-p x)))
  (let ((__function__ 'vl-echarpack->line))
    (declare (ignorable __function__))
    (if (consp x)
        (the (integer 0 *) (caar x))
      (the (unsigned-byte 30)
           (ash (the (unsigned-byte 60) x) -30)))))

Theorem: posp-of-vl-echarpack->line

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

Theorem: vl-echarpack->line-of-vl-echarpack

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