01: /*
02: * UnboundVariable.java
03: *
04: * Copyright (C) 2002-2003 Peter Graves
05: * $Id: UnboundVariable.java,v 1.6 2003/11/15 11:03:32 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 UnboundVariable extends CellError {
25: // obj is either the unbound variable itself or an initArgs list.
26: public UnboundVariable(LispObject obj) throws ConditionThrowable {
27: super (obj instanceof Cons ? obj : list2(Keyword.NAME, obj));
28: }
29:
30: public String getMessage() {
31: return "the variable " + getCellName() + " has no value";
32: }
33:
34: public LispObject typeOf() {
35: return Symbol.UNBOUND_VARIABLE;
36: }
37:
38: public LispClass classOf() {
39: return BuiltInClass.UNBOUND_VARIABLE;
40: }
41:
42: public LispObject typep(LispObject type) throws ConditionThrowable {
43: if (type == Symbol.UNBOUND_VARIABLE)
44: return T;
45: if (type == BuiltInClass.UNBOUND_VARIABLE)
46: return T;
47: return super.typep(type);
48: }
49: }
|