1 /* 2 * unbound_slot_instance.java 3 * 4 * Copyright (C) 2004 Peter Graves 5 * $Id$ 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License 9 * as published by the Free Software Foundation; either version 2 10 * of the License, or (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 20 * 21 * As a special exception, the copyright holders of this library give you 22 * permission to link this library with independent modules to produce an 23 * executable, regardless of the license terms of these independent 24 * modules, and to copy and distribute the resulting executable under 25 * terms of your choice, provided that you also meet, for each linked 26 * independent module, the terms and conditions of the license of that 27 * module. An independent module is a module which is not derived from 28 * or based on this library. If you modify this library, you may extend 29 * this exception to your version of the library, but you are not 30 * obligated to do so. If you do not wish to do so, delete this 31 * exception statement from your version. 32 */ 33 34 package org.armedbear.lisp; 35 36 import static org.armedbear.lisp.Lisp.*; 37 38 // ### unbound-slot-instance 39 public final class unbound_slot_instance extends Primitive 40 { unbound_slot_instance()41 private unbound_slot_instance() 42 { 43 super("unbound-slot-instance"); 44 } 45 46 @Override execute(LispObject arg)47 public LispObject execute(LispObject arg) 48 { 49 if (arg instanceof UnboundSlot) 50 return ((UnboundSlot)arg).getInstance(); 51 return type_error(arg, Symbol.UNBOUND_SLOT); 52 } 53 54 private static final unbound_slot_instance CELL_ERROR_NAME = 55 new unbound_slot_instance(); 56 } 57