/src/Boo.Lang.Compiler/Ast/OmittedExpression.cs

#region license

// Copyright (c) 2004, Rodrigo B. de Oliveira (rbo@acm.org)

// All rights reserved.

// 

// Redistribution and use in source and binary forms, with or without modification,

// are permitted provided that the following conditions are met:

// 

//     * Redistributions of source code must retain the above copyright notice,

//     this list of conditions and the following disclaimer.

//     * Redistributions in binary form must reproduce the above copyright notice,

//     this list of conditions and the following disclaimer in the documentation

//     and/or other materials provided with the distribution.

//     * Neither the name of Rodrigo B. de Oliveira nor the names of its

//     contributors may be used to endorse or promote products derived from this

//     software without specific prior written permission.

// 

// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND

// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE

// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR

// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER

// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,

// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

// THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#endregion



using System;



namespace Boo.Lang.Compiler.Ast

{

	/// <summary>

	/// </summary>

	public sealed class OmittedExpression : Expression

	{

		public static readonly Expression Default = new OmittedExpression();



		public OmittedExpression()

		{

		}

		

		override public NodeType NodeType

		{

			get

			{

				return NodeType.OmittedExpression;

			}

		}

		

		override public object Clone()

		{

			return this;

		}



		override public void Accept(IAstVisitor visitor)

		{

			visitor.OnOmittedExpression(this);

		}

		

		override public bool Matches(Node node)

		{

			return node is OmittedExpression;

		}

	}	

}