01: /*
02: * UnboundSlot.java
03: *
04: * Copyright (C) 2002-2003 Peter Graves
05: * $Id: UnboundSlot.java,v 1.6 2003/11/15 11:03:31 beedlem Exp $
06: *
07: * This program is free software; you can redistribute it and/or
08: * modify it under the terms of the GNU General Public License
09: * 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:
22: package org.armedbear.lisp;
23:
24: public final class UnboundSlot extends CellError {
25: public UnboundSlot(LispObject initArgs) throws ConditionThrowable {
26: super (initArgs);
27: }
28:
29: public String getMessage() {
30: return "the variable " + getCellName() + " has no value";
31: }
32:
33: public LispObject typeOf() {
34: return Symbol.UNBOUND_SLOT;
35: }
36:
37: public LispClass classOf() {
38: return BuiltInClass.UNBOUND_SLOT;
39: }
40:
41: public LispObject typep(LispObject type) throws ConditionThrowable {
42: if (type == Symbol.UNBOUND_SLOT)
43: return T;
44: if (type == BuiltInClass.UNBOUND_SLOT)
45: return T;
46: return super.typep(type);
47: }
48: }
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