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.codegen.Label; 29 import jdk.nashorn.internal.ir.annotations.Immutable; 30 import jdk.nashorn.internal.ir.visitor.NodeVisitor; 31 32 /** 33 * IR representation for {@code break} statements. 34 */ 35 @Immutable 36 public final class BreakNode 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 break or null if none 46 */ 47 public BreakNode(final int lineNumber, final long token, final int finish, final String labelName) { 48 super(lineNumber, token, finish, labelName); 49 } 50 51 private BreakNode(final BreakNode breakNode, final LocalVariableConversion conversion) { 52 super(breakNode, conversion); 53 } 54 55 @Override 56 public Node accept(final NodeVisitor<? extends LexicalContext> visitor) { 57 if (visitor.enterBreakNode(this)) { 58 return visitor.leaveBreakNode(this); 59 } 60 61 return this; 62 } 63 64 @Override 65 JumpStatement createNewJumpStatement(final LocalVariableConversion conversion) { 66 return new BreakNode(this, conversion); 67 } 68 69 @Override 70 String getStatementName() { 71 return "break"; 72 } 73 74 @Override 75 public BreakableNode getTarget(final LexicalContext lc) { 76 return lc.getBreakable(getLabelName()); 77 } 78 79 @Override 80 Label getTargetLabel(final BreakableNode target) { 81 return target.getBreakLabel(); 82 } 83 }