(defun concat-symbols (sym1 sym2)
  (intern (concatenate 'string (string sym1) (string sym2)))
)

(defmacro defun.fexpr (funname varlist &rest expr)
  (let ((ffunname (concat-symbols funname '.fexpr)))
    `(progn
      (defun ,ffunname ,varlist ,@expr)
      (defmacro ,funname (&body args)
        (list ',ffunname (list 'quote args)))
    )
  )
)

(defun fexprlist (el)
  (if (null el) nil
    (cons (concat-symbols (car el) '.fexpr)
          (fexprlist (cdr el)))
  )
)

;; use trace.fexpr(untrace.fexpr) instead of trace(untrace) 
;; for functions defined with defun.fexpr

(defmacro trace.fexpr (&body funname)
  (cons 'trace (fexprlist funname))
)

(defmacro untrace.fexpr (&body funname)
  (cons 'untrace (fexprlist funname))
)