mdw@git.distorted.org.uk Git - lisp/blob - infix-ext.lisp

   1 ;;; -*-lisp-*-
   2 ;;;
   3 ;;; Extensions for more infix operators
   4 ;;;
   5 ;;; (c) 2006 Mark Wooding
   6 ;;;
   7
   8 ;;;----- Licensing notice ---------------------------------------------------
   9 ;;;
  10 ;;; This program is free software; you can redistribute it and/or modify
  11 ;;; it under the terms of the GNU General Public License as published by
  12 ;;; the Free Software Foundation; either version 2 of the License, or
  13 ;;; (at your option) any later version.
  14 ;;;
  15 ;;; This program is distributed in the hope that it will be useful,
  16 ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 ;;; GNU General Public License for more details.
  19 ;;;
  20 ;;; You should have received a copy of the GNU General Public License
  21 ;;; along with this program; if not, write to the Free Software Foundation,
  22 ;;; Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  23
  24 (defpackage #:infix-ext
  25   (:use #:common-lisp #:mdw.base #:mdw.factorial #:infix-keywords #:infix))
  26 (in-package #:infix-ext)
  27
  28 (defun assignop-apply (op)
  29   (let ((y (popval))
  30         (x (popval)))
  31     (pushval (list 'update-place op x y))))
  32
  33 (definfix *= (120 . 5) (assignop-apply '*))
  34 (definfix %= (120 . 5) (assignop-apply 'mod))
  35 (definfix //= (120 . 5) (assignop-apply 'floor))
  36 (definfix &= (120 . 5) (assignop-apply 'logand))
  37 (definfix \|= (120 . 5) (assignop-apply 'logior))
  38 (definfix <<= (120 . 5) (assignop-apply 'ash))
  39 (definfix >>= (120 . 5) (unop-apply-toggle '-) (assignop-apply '*))
  40
  41 (defpostfix ++ 120 (unop-apply 'incf-after))
  42 (defpostfix -- 120 (unop-apply 'decf-after))
  43
  44 (defpostfix ! 120 (unop-apply 'factorial))
  45
  46 ;;;----- That's all, folks --------------------------------------------------