package lrs;

public class ToString implements IAlgo
{
   public static final ToString Singleton = new ToString ();

   private ToString ()
   {
   }
   
	/**
	 * @param host empty
	 * @param input  not used
	 * @return 
	 */
	public Object forEmpty(LRStruct host, Object input)
	{
		return "()";
	}

	/**
	 * @param host not empty
	 * @param input not used.
	 * @return 
	 */
	public Object forNonEmpty(LRStruct host, Object input)
	{
      return "(" + host.getFirst() + host.getRest().execute(ToStringHelp.Singleton, null);
	}
}