(defmacro lambdamoo-chatter-interact
    (func-name to msg docstring fmtstr &rest vals)
  "Define a function for interacting with another player"
  (let ((proc (gensym))
        (str (gensym)))
    `(defun ,func-name (,proc ,str)
       ,docstring
       (let ((,to lambdamoo-chatter)
             (,msg (substring-no-properties (lambdamoo-command-text ,str))))
         (if ,to
             (funcall lambdamoo-send-line ,proc
                      (format ,fmtstr . ,vals))
           (message "No chatter specified"))))))