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using Ilog.Language.Util;

namespace Ilog.Language.Parsing
{
  /**
   * This class is a representation of a grammar symbol at parse time,
   * whether terminal or nonterminal.
   *
   * @see	Terminal
   * @see	NonTerminal
   *
   * @version	Last modified on Wed May 25 15:49:36 2005 by hak
   * @author	<a href="mailto:hak@ilog.fr">Hassan A&iuml;t-Kaci</a>
   * @copyright	&copy; 2000 <a href="http://www.ilog.fr/">ILOG, S.A.</a>
   */
  public class Symbol : ArrayIndexed, Named
    {
      /**
       * Constructs a parser symbol with the specified name indexed
       * in the specified array.
       */
      internal Symbol (string name, Symbol[] symbols)
	: base(symbols)
        {
	  this.name = string.Intern(name);
	}

      /**
       * Constructs a parser symbol with the specified name indexed
       * in the specified array at the specified index.
       */
      internal Symbol (string name, Symbol[] symbols, int index)
	: base(symbols,index)
        {
	  this.name = string.Intern(name);
	}

      /**
       * The name of the parser symbol.
       */
      protected string name;
      public string Name
        {
	  get { return name; }
	}

      /**
       * Returns a string representation for this parser symbol.
       */
      public override string ToString ()
        {
	  return name;
	}
    }
}