safely.lisp: SAFE-COPY shouldn't make two copies under CLisp.

[lisp] / infix-ext.lisp

;;; -*-lisp-*-
;;;
;;; Extensions for more infix operators
;;;
;;; (c) 2006 Mark Wooding
;;;

;;;----- Licensing notice ---------------------------------------------------
;;;
;;; This program is free software; you can redistribute it and/or modify
;;; it under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 2 of the License, or
;;; (at your option) any later version.
;;;
;;; This program is distributed in the hope that it will be useful,
;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with this program; if not, write to the Free Software Foundation,
;;; Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

(defpackage #:infix-ext
  (:use #:common-lisp #:mdw.base #:mdw.factorial #:infix-keywords #:infix))
(in-package #:infix-ext)

(defun assignop-apply (op)
  (let ((y (popval))
	(x (popval)))
    (pushval (list 'update-place op x y))))

(definfix *= (120 . 5) (assignop-apply '*))
(definfix %= (120 . 5) (assignop-apply 'mod))
(definfix //= (120 . 5) (assignop-apply 'floor))
(definfix &= (120 . 5) (assignop-apply 'logand))
(definfix \|= (120 . 5) (assignop-apply 'logior))
(definfix <<= (120 . 5) (assignop-apply 'ash))
(definfix >>= (120 . 5) (unop-apply-toggle '-) (assignop-apply '*))

(defpostfix ++ 120 (unop-apply 'incf-after))
(defpostfix -- 120 (unop-apply 'decf-after))

(defpostfix ! 120 (unop-apply 'factorial))

;;;----- That's all, folks --------------------------------------------------