source: branches/2389-EpsLexicase/HeuristicLab.ExtLibs/HeuristicLab.NRefactory/5.5.0/NRefactory.CSharp-5.5.0/Ast/Expressions/NullReferenceExpression.cs

// 
// NullReferenceExpression.cs
//
// Author:
//       Mike Krüger <mkrueger@novell.com>
// 
// Copyright (c) 2009 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.NRefactory.CSharp
{
  /// <summary>
  /// null
  /// </summary>
  public class NullReferenceExpression : Expression
  {
    TextLocation location;
    public override TextLocation StartLocation {
      get {
        return location;
      }
    }
    
    internal void SetStartLocation(TextLocation value)
    {
      ThrowIfFrozen();
      this.location = value;
    }
    
    public override TextLocation EndLocation {
      get {
        return new TextLocation (location.Line, location.Column + "null".Length);
      }
    }
    
    public NullReferenceExpression ()
    {
    }
    
    public NullReferenceExpression (TextLocation location)
    {
      this.location = location;
    }
    
    public override void AcceptVisitor (IAstVisitor visitor)
    {
      visitor.VisitNullReferenceExpression (this);
    }
    
    public override T AcceptVisitor<T> (IAstVisitor<T> visitor)
    {
      return visitor.VisitNullReferenceExpression (this);
    }
    
    public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
    {
      return visitor.VisitNullReferenceExpression (this, data);
    }
    
    protected internal override bool DoMatch(AstNode other, PatternMatching.Match match)
    {
      NullReferenceExpression o = other as NullReferenceExpression;
      return o != null;
    }
  }
}