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Char-literal

Char-literal-kind

Get the kind (tag) of a char-literal structure.

Signature
(char-literal-kind x) → kind
Arguments: x — Guard (char-literalp x).

Definitions and Theorems

Function: char-literal-kind$inline

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

Theorem: char-literal-kind-possibilities

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