1 /*******************************************************************************
2 * Copyright (c) 2010 Association for Decentralized Information Management in
4 * All rights reserved. This program and the accompanying materials
5 * are made available under the terms of the Eclipse Public License v1.0
6 * which accompanies this distribution, and is available at
7 * http://www.eclipse.org/legal/epl-v10.html
10 * VTT Technical Research Centre of Finland - initial API and implementation
11 *******************************************************************************/
12 package org.simantics.spreadsheet.graph.parser.ast;
14 import java.io.Serializable;
16 public class AstNothing implements AstValue {
18 private static final long serialVersionUID = 4968570232015650370L;
20 public static final AstNothing INSTANCE = new AstNothing();
21 public static final Serializable NOTHING = new Serializable() {
22 private static final long serialVersionUID = -3704142714710129215L;
26 public <T> T accept(AstValueVisitor<T> v) {