source: branches/f4grobner/ring-and-order.lisp@ 932

;;; -*-  Mode: Lisp; Package: Maxima; Syntax: Common-Lisp; Base: 10 -*- 
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;;;                                                                              
;;;  Copyright (C) 1999, 2002, 2009, 2015 Marek Rychlik <rychlik@u.arizona.edu>          
;;;                                                                              
;;;  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.                                         
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;;;  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.                                
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;;;  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.  
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(defpackage "RING-AND-ORDER"
  (:use :cl :ring :order)
  (:export "RING-AND-ORDER"
           "MAKE-RING-AND-ORDER"
           "RO-ORDER"
           "RO-RING"
           "RO-ORDER"))

(in-package :ring-and-order)

(defstruct (ring-and-order 
             (:conc-name ro-)
             (:constructor make-ring-and-order (&key 
                                                (ring  nil ring-supplied-p)
                                                (order nil order-supplied-p)
                                                (primary-elimination-order   nil primary-elimination-order-supplied-p)
                                                (secondary_elimination_order nil secondary_elimination_order-supplied-p)
                                                (elimination-order-factory
                                                 (cond 
                                                   ((and primary-elimination-order-supplied-p
                                                         secondary_elimination_order-supplied-p)
                                                    (make-elimination-order-maker primary-elimination-order
                                                                                  secondary_elimination_order)))))))
  (ring  *ring-of-integers* :type ring)
  (order #'lex> :type function)
  (elimination-order-factory nil :type function))