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 26 package jdk.nashorn.internal.ir; 27 28 import jdk.nashorn.internal.ir.annotations.Immutable; 29 import jdk.nashorn.internal.ir.visitor.NodeVisitor; 30 31 /** 32 * IR representation for an empty statement. 33 */ 34 @Immutable 35 public final class EmptyNode extends Statement { 36 private static final long serialVersionUID = 1L; 37 38 /** 39 * Constructor 40 * 41 * @param node node to wrap 42 */ 43 public EmptyNode(final Statement node) { 44 super(node); 45 } 46 47 /** 48 * Constructor 49 * 50 * @param lineNumber line number 51 * @param token token 52 * @param finish finish 53 */ 54 public EmptyNode(final int lineNumber, final long token, final int finish) { 55 super(lineNumber, token, finish); 56 } 57 58 59 @Override 60 public Node accept(final NodeVisitor<? extends LexicalContext> visitor) { 61 if (visitor.enterEmptyNode(this)) { 62 return visitor.leaveEmptyNode(this); 63 } 64 return this; 65 } 66 67 @Override 68 public void toString(final StringBuilder sb, final boolean printTypes) { 69 sb.append(';'); 70 } 71 72 }