source: branches/2893_BNLR/HeuristicLab.ExtLibs/HeuristicLab.NRefactory/5.5.0/NRefactory.CSharp-5.5.0/Ast/IdentifierExpressionBackreference.cs

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using System;
using System.Linq;
using ICSharpCode.NRefactory.PatternMatching;

namespace ICSharpCode.NRefactory.CSharp
{
  /// <summary>
  /// Matches identifier expressions that have the same identifier as the referenced variable/type definition/method definition.
  /// </summary>
  public class IdentifierExpressionBackreference : Pattern
  {
    readonly string referencedGroupName;
    
    public string ReferencedGroupName {
      get { return referencedGroupName; }
    }
    
    public IdentifierExpressionBackreference(string referencedGroupName)
    {
      if (referencedGroupName == null)
        throw new ArgumentNullException("referencedGroupName");
      this.referencedGroupName = referencedGroupName;
    }
    
    public override bool DoMatch(INode other, Match match)
    {
      CSharp.IdentifierExpression ident = other as CSharp.IdentifierExpression;
      if (ident == null || ident.TypeArguments.Any())
        return false;
      CSharp.AstNode referenced = (CSharp.AstNode)match.Get(referencedGroupName).Last();
      if (referenced == null)
        return false;
      return ident.Identifier == referenced.GetChildByRole(CSharp.Roles.Identifier).Name;
    }
  }
}