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Fgl-rule

Fgl-rule-kind

Get the kind (tag) of a fgl-rule structure.

Signature
(fgl-rule-kind x) → kind
Arguments: x — Guard (fgl-rule-p x).

Definitions and Theorems

Function: fgl-rule-kind$inline

(defun fgl-rule-kind$inline (x)
  (declare (xargs :guard (fgl-rule-p x)))
  (let ((__function__ 'fgl-rule-kind))
    (declare (ignorable __function__))
    (mbe :logic (cond ((or (atom x) (eq (car x) :rewrite))
                       :rewrite)
                      ((eq (car x) :primitive) :primitive)
                      (t :meta))
         :exec (car x))))

Theorem: fgl-rule-kind-possibilities

(defthm fgl-rule-kind-possibilities
  (or (equal (fgl-rule-kind x) :rewrite)
      (equal (fgl-rule-kind x) :primitive)
      (equal (fgl-rule-kind x) :meta))
  :rule-classes
  ((:forward-chaining :trigger-terms ((fgl-rule-kind x)))))