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Char/container

Char/container-kind

Get the kind (tag) of a char/container structure.

Signature
(char/container-kind x) → kind
Arguments: x — Guard (char/container-p x).

Definitions and Theorems

Function: char/container-kind$inline

(defun char/container-kind$inline (x)
  (declare (xargs :guard (char/container-p x)))
  (let ((__function__ 'char/container-kind))
    (declare (ignorable __function__))
    (mbe :logic (cond ((or (atom x) (eq (car x) :char)) :char)
                      (t :container))
         :exec (car x))))

Theorem: char/container-kind-possibilities

(defthm char/container-kind-possibilities
  (or (equal (char/container-kind x) :char)
      (equal (char/container-kind x)
             :container))
  :rule-classes
  ((:forward-chaining :trigger-terms ((char/container-kind x)))))