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Java > Open Source Codes > org > armedbear > lisp > Throw


1 /*
2  * Throw.java
3  *
4  * Copyright (C) 2002-2004 Peter Graves
5  * $Id: Throw.java,v 1.12 2004/06/04 00:34:03 piso Exp $
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
22 package org.armedbear.lisp;
23
24 public final class Throw extends ConditionThrowable
25 {
26     public final LispObject tag;
27     private final LispObject result;
28     private final LispObject[] values;
29
30     public Throw(LispObject tag, LispObject result, LispThread thread)
31         throws ConditionThrowable
32     {
33         this.tag = tag;
34         this.result = result;
35         values = thread._values;
36     }
37
38     public LispObject getResult(LispThread thread) throws ConditionThrowable
39     {
40         thread._values = values;
41         return result;
42     }
43
44     public LispObject getCondition()
45     {
46         return new ControlError("Attempt to throw to the nonexistent tag " +
47                                 tag + ".");
48     }
49 }
50
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