| /***** BEGIN LICENSE BLOCK ***** |
| * Version: CPL 1.0/GPL 2.0/LGPL 2.1 |
| * |
| * The contents of this file are subject to the Common Public |
| * License Version 1.0 (the "License"); you may not use this file |
| * except in compliance with the License. You may obtain a copy of |
| * the License at http://www.eclipse.org/legal/cpl-v10.html |
| * |
| * Software distributed under the License is distributed on an "AS |
| * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or |
| * implied. See the License for the specific language governing |
| * rights and limitations under the License. |
| * |
| * Copyright (C) 2002 Anders Bengtsson <ndrsbngtssn@yahoo.se> |
| * Copyright (C) 2002 Jan Arne Petersen <jpetersen@uni-bonn.de> |
| * Copyright (C) 2002 Benoit Cerrina <b.cerrina@wanadoo.fr> |
| * Copyright (C) 2004-2005 Thomas E Enebo <enebo@acm.org> |
| * Copyright (C) 2004 Stefan Matthias Aust <sma@3plus4.de> |
| * |
| * Alternatively, the contents of this file may be used under the terms of |
| * either of the GNU General Public License Version 2 or later (the "GPL"), |
| * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), |
| * in which case the provisions of the GPL or the LGPL are applicable instead |
| * of those above. If you wish to allow use of your version of this file only |
| * under the terms of either the GPL or the LGPL, and not to allow others to |
| * use your version of this file under the terms of the CPL, indicate your |
| * decision by deleting the provisions above and replace them with the notice |
| * and other provisions required by the GPL or the LGPL. If you do not delete |
| * the provisions above, a recipient may use your version of this file under |
| * the terms of any one of the CPL, the GPL or the LGPL. |
| ***** END LICENSE BLOCK *****/ |
| package org.jruby.ast; |
| |
| import java.util.List; |
| |
| import org.jruby.ast.types.IArityNode; |
| import org.jruby.ast.visitor.NodeVisitor; |
| import org.jruby.evaluator.Instruction; |
| import org.jruby.lexer.yacc.ISourcePosition; |
| import org.jruby.runtime.Arity; |
| |
| /** Represents a zero arg in a block. |
| * this is never visited and is used only in an instanceof check |
| * <pre> |
| * do || |
| * end |
| * </pre> |
| * |
| * @author jpetersen |
| */ |
| public class ZeroArgNode extends Node implements IArityNode { |
| static final long serialVersionUID = 6596791950608957025L; |
| |
| public ZeroArgNode(ISourcePosition position) { |
| super(position, NodeTypes.ZEROARGNODE); |
| } |
| |
| /** |
| * @see Node#accept(NodeVisitor) |
| */ |
| public Instruction accept(NodeVisitor visitor) { |
| return null; // never visited, should be ok |
| } |
| |
| /** |
| * Zero arguments... |
| */ |
| public Arity getArity() { |
| return Arity.noArguments(); |
| } |
| |
| public List childNodes() { |
| return EMPTY_LIST; |
| } |
| } |