/*******************************************************************************
* Copyright (c) 2009 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
* Zend Technologies
*******************************************************************************/
package org.eclipse.php.core.compiler.ast.nodes;
import org.eclipse.dltk.ast.ASTVisitor;
import org.eclipse.dltk.ast.expressions.Expression;
import org.eclipse.dltk.utils.CorePrinter;
import org.eclipse.php.internal.core.compiler.ast.visitor.ASTPrintVisitor;
/**
* Represents an reference to a variable to be used inside function call.
*
* <pre>
* e.g.
*
* <pre>
* &$a, &$a[0], &$$a, &$a{'key'}
*/
public class ReferenceExpression extends Expression {
private final Expression variable;
public ReferenceExpression(int start, int end, Expression variable) {
super(start, end);
assert variable != null;
this.variable = variable;
}
public void traverse(ASTVisitor visitor) throws Exception {
final boolean visit = visitor.visit(this);
if (visit) {
variable.traverse(visitor);
}
visitor.endvisit(this);
}
public int getKind() {
return ASTNodeKinds.REFERENCE;
}
public Expression getVariable() {
return variable;
}
/**
* We don't print anything - we use {@link ASTPrintVisitor} instead
*/
public final void printNode(CorePrinter output) {
}
public String toString() {
return ASTPrintVisitor.toXMLString(this);
}
}