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Symbol

Symbol-kind

Get the kind (tag) of a symbol structure.

Signature
(symbol-kind x) → kind
Arguments: x — Guard (symbolp x).

Definitions and Theorems

Function: symbol-kind$inline

(defun symbol-kind$inline (x)
  (declare (xargs :guard (symbolp x)))
  (let ((__function__ 'symbol-kind))
    (declare (ignorable __function__))
    (cond ((natp x) :terminal)
          (t :nonterminal))))

Theorem: symbol-kind-possibilities

(defthm symbol-kind-possibilities
  (or (equal (symbol-kind x) :terminal)
      (equal (symbol-kind x) :nonterminal))
  :rule-classes
  ((:forward-chaining :trigger-terms ((symbol-kind x)))))