ILSpy/ICSharpCode.Decompiler/CSharp/Syntax/Expressions/DirectionExpression.cs

// 
// DirectionExpression.cs
//  
// Author:
//       Mike Krüger <mkrueger@novell.com>
// 
// Copyright (c) 2010 Novell, Inc (http://www.novell.com)
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.


namespace ICSharpCode.Decompiler.CSharp.Syntax
{
	public enum FieldDirection
	{
		None,
		Out,
		Ref,
		In
	}

	/// <summary>
	/// ref Expression
	/// </summary>
	public class DirectionExpression : Expression
	{
		public readonly static TokenRole RefKeywordRole = new TokenRole("ref");
		public readonly static TokenRole OutKeywordRole = new TokenRole("out");
		public readonly static TokenRole InKeywordRole = new TokenRole("in");

		public FieldDirection FieldDirection {
			get;
			set;
		}

		public CSharpTokenNode FieldDirectionToken {
			get {
				switch (FieldDirection)
				{
					case FieldDirection.Ref:
						return GetChildByRole(RefKeywordRole);
					case FieldDirection.In:
						return GetChildByRole(InKeywordRole);
					default:
						return GetChildByRole(OutKeywordRole);
				}
			}
		}

		public Expression Expression {
			get { return GetChildByRole(Roles.Expression); }
			set { SetChildByRole(Roles.Expression, value); }
		}

		public DirectionExpression()
		{
		}

		public DirectionExpression(FieldDirection direction, Expression expression)
		{
			this.FieldDirection = direction;
			AddChild(expression, Roles.Expression);
		}

		public override void AcceptVisitor(IAstVisitor visitor)
		{
			visitor.VisitDirectionExpression(this);
		}

		public override T AcceptVisitor<T>(IAstVisitor<T> visitor)
		{
			return visitor.VisitDirectionExpression(this);
		}

		public override S AcceptVisitor<T, S>(IAstVisitor<T, S> visitor, T data)
		{
			return visitor.VisitDirectionExpression(this, data);
		}

		protected internal override bool DoMatch(AstNode other, PatternMatching.Match match)
		{
			DirectionExpression o = other as DirectionExpression;
			return o != null && this.FieldDirection == o.FieldDirection && this.Expression.DoMatch(o.Expression, match);
		}
	}
}