EmptyNode.java revision 953:221a84ef44c0 
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.ir.annotations.Immutable;
29import jdk.nashorn.internal.ir.visitor.NodeVisitor;
30
31/**
32 * IR representation for an empty statement.
33 */
34@Immutable
35public final class EmptyNode extends Statement {
36
37    /**
38     * Constructor
39     *
40     * @param node node to wrap
41     */
42    public EmptyNode(final Statement node) {
43        super(node);
44    }
45
46    /**
47     * Constructor
48     *
49     * @param lineNumber line number
50     * @param token      token
51     * @param finish     finish
52     */
53    public EmptyNode(final int lineNumber, final long token, final int finish) {
54        super(lineNumber, token, finish);
55    }
56
57
58    @Override
59    public Node accept(final NodeVisitor<? extends LexicalContext> visitor) {
60        if (visitor.enterEmptyNode(this)) {
61            return visitor.leaveEmptyNode(this);
62        }
63        return this;
64    }
65
66    @Override
67    public void toString(final StringBuilder sb, final boolean printTypes) {
68        sb.append(';');
69    }
70
71}
72