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Outcome

Outcome-kind

Get the kind (tag) of a outcome structure.

Signature
(outcome-kind x) → kind
Arguments: x — Guard (outcomep x).

Definitions and Theorems

Function: outcome-kind$inline

(defun outcome-kind$inline (x)
  (declare (xargs :guard (outcomep x)))
  (let ((__function__ 'outcome-kind))
    (declare (ignorable __function__))
    (mbe :logic (cond ((or (atom x) (eq (car x) :terminated))
                       :terminated)
                      (t :nonterminating))
         :exec (car x))))

Theorem: outcome-kind-possibilities

(defthm outcome-kind-possibilities
  (or (equal (outcome-kind x) :terminated)
      (equal (outcome-kind x)
             :nonterminating))
  :rule-classes
  ((:forward-chaining :trigger-terms ((outcome-kind x)))))