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