		Search-engine friendly clone of the ACL2 documentation.

Acre-internals

Repeatmod-p

This is an ordinary defenum.

Function: repeatmod-p

(defun repeatmod-p (x)
  (declare (xargs :guard t))
  (or (eq x ':?) (eq x ':+) (eq x 'nil)))

Theorem: type-when-repeatmod-p

(defthm type-when-repeatmod-p
  (implies (repeatmod-p x)
           (if (if (symbolp x)
                   (if (not (equal x 't))
                       (not (equal x 'nil))
                     'nil)
                 'nil)
               't
             (equal x 'nil)))
  :rule-classes :compound-recognizer)