ContinueNode.java revision 1173:82ae555768c7 
1/*
2 * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26package jdk.nashorn.internal.ir;
27
28import jdk.nashorn.internal.codegen.Label;
29import jdk.nashorn.internal.ir.annotations.Immutable;
30import jdk.nashorn.internal.ir.visitor.NodeVisitor;
31
32/**
33 * IR representation for CONTINUE statements.
34 */
35@Immutable
36public class ContinueNode extends JumpStatement {
37    private static final long serialVersionUID = 1L;
38
39    /**
40     * Constructor
41     *
42     * @param lineNumber line number
43     * @param token      token
44     * @param finish     finish
45     * @param labelName  label name for continue or null if none
46     */
47    public ContinueNode(final int lineNumber, final long token, final int finish, final String labelName) {
48        super(lineNumber, token, finish, labelName);
49    }
50
51    private ContinueNode(final ContinueNode continueNode, final LocalVariableConversion conversion) {
52        super(continueNode, conversion);
53    }
54
55    @Override
56    public Node accept(final NodeVisitor<? extends LexicalContext> visitor) {
57        if (visitor.enterContinueNode(this)) {
58            return visitor.leaveContinueNode(this);
59        }
60
61        return this;
62    }
63
64    @Override
65    JumpStatement createNewJumpStatement(final LocalVariableConversion conversion) {
66        return new ContinueNode(this, conversion);
67    }
68
69    @Override
70    String getStatementName() {
71        return "continue";
72    }
73
74
75    @Override
76    public BreakableNode getTarget(final LexicalContext lc) {
77        return lc.getContinueTo(getLabelName());
78    }
79
80    @Override
81    Label getTargetLabel(final BreakableNode target) {
82        return ((LoopNode)target).getContinueLabel();
83    }
84}
85