source: branches/2434_crossvalidation/HeuristicLab.ExtLibs/HeuristicLab.NRefactory/5.5.0/NRefactory.CSharp-5.5.0/Ast/TokenRole.cs

using System;
using System.Collections.Generic;

namespace ICSharpCode.NRefactory.CSharp
{
  /// <summary>
  /// A specific role only used for C# tokens
  /// </summary>
  public sealed class TokenRole : Role<CSharpTokenNode>
  {
    internal readonly static List<string> Tokens = new List<string> ();
    internal readonly static List<int>    TokenLengths = new List<int> ();
    internal readonly uint TokenIndex;

    static TokenRole ()
    {
      // null token
      Tokens.Add ("");
      TokenLengths.Add (0);
    }

    /// <summary>
    /// Gets the token as string. Note that the token Name and Token value may differ.
    /// </summary>
    public string Token {
      get;
      private set;
    }
    
    /// <summary>
    /// Gets the char length of the token.
    /// </summary>
    public int Length {
      get;
      private set;
    }


    public TokenRole(string token) : base (token, CSharpTokenNode.Null)
    {
      this.Token = token;
      this.Length = token.Length;

      bool found = false;
      for (int i = 0; i < Tokens.Count; i++) {
        var existingToken = Tokens [i];
        if (existingToken == token) {
          TokenIndex = (uint)i;
          found = true;
          break;
        }
      }
      if (!found) {
        TokenIndex = (uint)Tokens.Count;
        Tokens.Add (token);
        TokenLengths.Add (this.Length);
      }
    }
  }
}