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Character-result

Character-result-kind

Get the kind (tag) of a character-result structure.

Signature
(character-result-kind x) → kind
Arguments: x — Guard (character-resultp x).

Definitions and Theorems

Function: character-result-kind$inline

(defun character-result-kind$inline (x)
  (declare (xargs :guard (character-resultp x)))
  (let ((__function__ 'character-result-kind))
    (declare (ignorable __function__))
    (cond ((characterp x) :ok) (t :err))))

Theorem: character-result-kind-possibilities

(defthm character-result-kind-possibilities
  (or (equal (character-result-kind x) :ok)
      (equal (character-result-kind x) :err))
  :rule-classes
  ((:forward-chaining :trigger-terms ((character-result-kind x)))))