/*******************************************************************************
* 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 a postfix expression
*
* <pre>
* e.g.
*
* <pre>
* $a++, foo()--
*/
public class PostfixExpression extends Expression {
// '++'
public static final int OP_INC = 0;
// '--'
public static final int OP_DEC = 1;
private final Expression variable;
private final int operator;
public PostfixExpression(int start, int end, Expression variable, int operator) {
super(start, end);
assert variable != null;
this.variable = variable;
this.operator = operator;
}
public void traverse(ASTVisitor visitor) throws Exception {
final boolean visit = visitor.visit(this);
if (visit) {
variable.traverse(visitor);
}
visitor.endvisit(this);
}
public String getOperator() {
switch (getOperatorType()) {
case OP_DEC:
return "--"; //$NON-NLS-1$
case OP_INC:
return "++"; //$NON-NLS-1$
default:
throw new IllegalArgumentException();
}
}
public int getKind() {
return ASTNodeKinds.POSTFIX_EXPRESSION;
}
public int getOperatorType() {
return operator;
}
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);
}
}