preval.lisp

(defmacro preval (&rest stuff) `(print ,stuff))

;;;; This Common Lisp macro is useful for debugging.

;;;; Rather than turning a statement like
;;;; (+ 2 3 (* 2 5))
;;;; into
;;;; (+ 2 3 (print (* 2 5)))
;;;; and back again for debugging, you can do this
;;;; (+ 2 3 (preval * 2 5))
;;;; which is much easier, since you only have to change one place in the code
;;;; (the front of the sexp) rather than two places (the front and back).

;;;; Do whatever you want with this.