Get the kind (tag) of a nat-option-result structure.
(nat-option-result-kind x) → kind
Function:
(defun nat-option-result-kind$inline (x) (declare (xargs :guard (nat-option-resultp x))) (let ((__function__ 'nat-option-result-kind)) (declare (ignorable __function__)) (cond ((nat-optionp x) :ok) (t :err))))
Theorem:
(defthm nat-option-result-kind-possibilities (or (equal (nat-option-result-kind x) :ok) (equal (nat-option-result-kind x) :err)) :rule-classes ((:forward-chaining :trigger-terms ((nat-option-result-kind x)))))