jlaskey@3: /*
jlaskey@7:  * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
jlaskey@3:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
jlaskey@3:  *
jlaskey@3:  * This code is free software; you can redistribute it and/or modify it
jlaskey@3:  * under the terms of the GNU General Public License version 2 only, as
jlaskey@3:  * published by the Free Software Foundation.  Oracle designates this
jlaskey@3:  * particular file as subject to the "Classpath" exception as provided
jlaskey@3:  * by Oracle in the LICENSE file that accompanied this code.
jlaskey@3:  *
jlaskey@3:  * This code is distributed in the hope that it will be useful, but WITHOUT
jlaskey@3:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
jlaskey@3:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
jlaskey@3:  * version 2 for more details (a copy is included in the LICENSE file that
jlaskey@3:  * accompanied this code).
jlaskey@3:  *
jlaskey@3:  * You should have received a copy of the GNU General Public License version
jlaskey@3:  * 2 along with this work; if not, write to the Free Software Foundation,
jlaskey@3:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
jlaskey@3:  *
jlaskey@3:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
jlaskey@3:  * or visit www.oracle.com if you need additional information or have any
jlaskey@3:  * questions.
jlaskey@3:  */
jlaskey@3: 
jlaskey@3: package jdk.nashorn.internal.ir;
jlaskey@3: 
lagergren@16: import jdk.nashorn.internal.ir.annotations.Ignore;
jlaskey@3: import jdk.nashorn.internal.ir.visitor.NodeVisitor;
jlaskey@3: import jdk.nashorn.internal.runtime.Source;
jlaskey@3: 
jlaskey@3: /**
jlaskey@3:  * IR representation for a labeled statement.
jlaskey@3:  *
jlaskey@3:  */
jlaskey@3: 
jlaskey@3: public class LabelNode extends Node {
jlaskey@3:     /** Label ident. */
jlaskey@3:     private IdentNode label;
jlaskey@3: 
jlaskey@3:     /** Statements. */
jlaskey@3:     private Block body;
jlaskey@3: 
jlaskey@3:     /** Node to break from. */
lagergren@16:     @Ignore
jlaskey@3:     private Node breakNode;
jlaskey@3: 
jlaskey@3:     /** Node to continue. */
lagergren@16:     @Ignore
jlaskey@3:     private Node continueNode;
jlaskey@3: 
jlaskey@3:     /**
jlaskey@3:      * Constructor
jlaskey@3:      *
jlaskey@3:      * @param source the source
jlaskey@3:      * @param token  token
jlaskey@3:      * @param finish finish
jlaskey@3:      * @param label  label identifier
jlaskey@3:      * @param body   body of label node
jlaskey@3:      */
jlaskey@3:     public LabelNode(final Source source, final long token, final int finish, final IdentNode label, final Block body) {
jlaskey@3:         super(source, token, finish);
jlaskey@3: 
jlaskey@3:         this.label = label;
jlaskey@3:         this.body  = body;
jlaskey@3:     }
jlaskey@3: 
jlaskey@3:     private LabelNode(final LabelNode labelNode, final CopyState cs) {
jlaskey@3:         super(labelNode);
jlaskey@3: 
jlaskey@3:         label        = (IdentNode)cs.existingOrCopy(labelNode.label);
jlaskey@3:         body         = (Block)cs.existingOrCopy(labelNode.body);
jlaskey@3:         breakNode    = cs.existingOrSame(labelNode.breakNode);
jlaskey@3:         continueNode = cs.existingOrSame(labelNode.continueNode);
jlaskey@3:     }
jlaskey@3: 
jlaskey@3:     @Override
jlaskey@3:     protected Node copy(final CopyState cs) {
jlaskey@3:         return new LabelNode(this, cs);
jlaskey@3:     }
jlaskey@3: 
jlaskey@3:     @Override
jlaskey@3:     public Node accept(final NodeVisitor visitor) {
jlaskey@3:         if (visitor.enter(this) != null) {
jlaskey@3:             label = (IdentNode)label.accept(visitor);
jlaskey@3:             body  = (Block)body.accept(visitor);
jlaskey@3:             return visitor.leave(this);
jlaskey@3:         }
jlaskey@3: 
jlaskey@3:         return this;
jlaskey@3:     }
jlaskey@3: 
jlaskey@3:     @Override
jlaskey@3:     public void toString(final StringBuilder sb) {
jlaskey@3:         label.toString(sb);
jlaskey@3:         sb.append(':');
jlaskey@3:     }
jlaskey@3: 
jlaskey@3:     /**
jlaskey@3:      * Get the body of the node
jlaskey@3:      * @return the body
jlaskey@3:      */
jlaskey@3:     public Block getBody() {
jlaskey@3:         return body;
jlaskey@3:     }
jlaskey@3: 
jlaskey@3:     /**
jlaskey@3:      * Reset the body of the node
jlaskey@3:      * @param body new body
jlaskey@3:      */
jlaskey@3:     public void setBody(final Block body) {
jlaskey@3:         this.body = body;
jlaskey@3:     }
jlaskey@3: 
jlaskey@3:     /**
jlaskey@3:      * Get the break node for this node
jlaskey@3:      * @return the break node
jlaskey@3:      */
jlaskey@3:     public Node getBreakNode() {
jlaskey@3:         return breakNode;
jlaskey@3:     }
jlaskey@3: 
jlaskey@3:     /**
jlaskey@3:      * Reset the break node for this node
jlaskey@3:      * @param breakNode the break node
jlaskey@3:      */
jlaskey@3:     public void setBreakNode(final Node breakNode) {
hannesw@93:         assert breakNode instanceof BreakableNode || breakNode instanceof Block : "Invalid break node: " + breakNode;
jlaskey@3:         this.breakNode = breakNode;
jlaskey@3:     }
jlaskey@3: 
jlaskey@3:     /**
jlaskey@3:      * Get the continue node for this node
jlaskey@3:      * @return the continue node
jlaskey@3:      */
jlaskey@3:     public Node getContinueNode() {
jlaskey@3:         return continueNode;
jlaskey@3:     }
jlaskey@3: 
jlaskey@3:     /**
jlaskey@3:      * Reset the continue node for this node
jlaskey@3:      * @param continueNode the continue node
jlaskey@3:      */
jlaskey@3:     public void setContinueNode(final Node continueNode) {
hannesw@93:         assert continueNode instanceof WhileNode : "invalid continue node: " + continueNode;
jlaskey@3:         this.continueNode = continueNode;
jlaskey@3:     }
jlaskey@3: 
jlaskey@3:     /**
jlaskey@3:      * Get the identifier representing the label name
jlaskey@3:      * @return the label
jlaskey@3:      */
jlaskey@3:     public IdentNode getLabel() {
jlaskey@3:         return label;
jlaskey@3:     }
jlaskey@3: 
jlaskey@3: }