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    Pinst->width

    Signature
    (pinst->width x) → width
    Arguments
    x — Guard (pinst-p x).
    Returns
    width — Type (posp width).

    Definitions and Theorems

    Function: pinst->width

    (defun pinst->width (x)
      (declare (xargs :guard (pinst-p x)))
      (let ((acl2::__function__ 'pinst->width))
        (declare (ignorable acl2::__function__))
        (pinst-case x
                    :flat (pflat->width x.guts)
                    :keyline (pflat->width x.guts)
                    :dot x.width
                    :quote x.width
                    :wide x.width
                    :keypair x.width
                    :indent x.width
                    :special-term x.width)))

    Theorem: posp-of-pinst->width

    (defthm posp-of-pinst->width
      (b* ((width (pinst->width x)))
        (posp width))
      :rule-classes :type-prescription)