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Literal

Literal-kind

Get the kind (tag) of a literal structure.

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

Definitions and Theorems

Function: literal-kind$inline

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

Theorem: literal-kind-possibilities

(defthm literal-kind-possibilities
  (or (equal (literal-kind x) :integer)
      (equal (literal-kind x) :fpoint)
      (equal (literal-kind x) :char)
      (equal (literal-kind x) :string)
      (equal (literal-kind x) :boolean)
      (equal (literal-kind x) :null))
  :rule-classes
  ((:forward-chaining :trigger-terms ((literal-kind x)))))