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Unary-op

Unary-op-kind

Get the kind (tag) of a unary-op structure.

Signature
(unary-op-kind x) → kind
Arguments: x — Guard (unary-opp x).

Definitions and Theorems

Function: unary-op-kind$inline

(defun unary-op-kind$inline (x)
  (declare (xargs :guard (unary-opp x)))
  (let ((__function__ 'unary-op-kind))
    (declare (ignorable __function__))
    (mbe :logic (cond ((or (atom x) (eq (car x) :not)) :not)
                      (t :minus))
         :exec (car x))))

Theorem: unary-op-kind-possibilities

(defthm unary-op-kind-possibilities
  (or (equal (unary-op-kind x) :not)
      (equal (unary-op-kind x) :minus))
  :rule-classes
  ((:forward-chaining :trigger-terms ((unary-op-kind x)))))