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Vl-timeunit

Vl-timeunit-p

Symbol representation of time units.

This is an ordinary defenum.

Function: vl-timeunit-p

(defun vl-timeunit-p (x)
  (declare (xargs :guard t))
  (or (eq x ':vl-s)
      (eq x ':vl-ms)
      (eq x ':vl-us)
      (eq x ':vl-ns)
      (eq x ':vl-ps)
      (eq x ':vl-fs)))

Theorem: type-when-vl-timeunit-p

(defthm type-when-vl-timeunit-p
  (implies (vl-timeunit-p x)
           (if (symbolp x)
               (if (not (equal x 't))
                   (not (equal x 'nil))
                 'nil)
             'nil))
  :rule-classes :compound-recognizer)