Kinds of forward type declarations.
This is an ordinary defenum.
Function:
(defun vl-fwdtypedefkind-p (x) (declare (xargs :guard t)) (or (eq x ':vl-enum) (eq x ':vl-struct) (eq x ':vl-union) (eq x ':vl-class) (eq x ':vl-interfaceclass)))
Theorem: type-when-vl-fwdtypedefkind-p
(defthm type-when-vl-fwdtypedefkind-p (implies (vl-fwdtypedefkind-p x) (if (symbolp x) (if (not (equal x 't)) (not (equal x 'nil)) 'nil) 'nil)) :rule-classes :compound-recognizer)