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Element

Element-kind

Get the kind (tag) of a element structure.

Signature
(element-kind x) → kind
Arguments: x — Guard (elementp x).

Definitions and Theorems

Function: element-kind$inline

(defun element-kind$inline (x)
  (declare (xargs :guard (elementp x)))
  (let ((__function__ 'element-kind))
    (declare (ignorable __function__))
    (mbe :logic (cond ((or (atom x) (eq (car x) :rulename))
                       :rulename)
                      ((eq (car x) :group) :group)
                      ((eq (car x) :option) :option)
                      ((eq (car x) :char-val) :char-val)
                      ((eq (car x) :num-val) :num-val)
                      (t :prose-val))
         :exec (car x))))

Theorem: element-kind-possibilities

(defthm element-kind-possibilities
  (or (equal (element-kind x) :rulename)
      (equal (element-kind x) :group)
      (equal (element-kind x) :option)
      (equal (element-kind x) :char-val)
      (equal (element-kind x) :num-val)
      (equal (element-kind x) :prose-val))
  :rule-classes
  ((:forward-chaining :trigger-terms ((element-kind x)))))