| /******************************************************************************* |
| * Copyright (c) 2005, 2011 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 |
| *******************************************************************************/ |
| package org.eclipse.jdt.internal.debug.eval.ast.instructions; |
| |
| import org.eclipse.core.runtime.CoreException; |
| |
| /** |
| * Duplicate the top element of the stack |
| * |
| * Element ... |
| * |
| * -> |
| * |
| * Element Element ... |
| * |
| */ |
| public class Dup extends SimpleInstruction { |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see |
| * org.eclipse.jdt.internal.debug.eval.ast.instructions.Instruction#execute |
| * () |
| */ |
| @Override |
| public void execute() throws CoreException { |
| Object element = pop(); |
| push(element); |
| push(element); |
| } |
| |
| @Override |
| public String toString() { |
| return "Dup"; //$NON-NLS-1$ |
| } |
| |
| } |