public override void VisitLeave(AndPredicate expression)
		{
			IsMatchPredicate exp = _matchStack.Pop();
			_matchStack.Push(
				delegate(IInputIterator iterator)
				{
					_disableCapturingGroup.Push(true);

					_xmlDisableBackReferencePop.Push(true);
					Boolean result = true;
					Int32 savePosition = iterator.Index;
					if (exp(iterator))
					{
						iterator.Index = savePosition;
						result &= true;
					}
					else
					{
						iterator.Index = savePosition;
						result &= false;
					}

					_xmlDisableBackReferencePop.Pop();

					_disableCapturingGroup.Pop();

					return result;
				}
			);
		}
		public override void VisitEnter(AndPredicate expression)
		{
		}
		public override void VisitExecute(AndPredicate expression)
		{
		}
		public override void VisitLeave(AndPredicate expression)
		{
			terminal.Peek().Append(") ");
		}
		public override void VisitEnter(AndPredicate expression)
		{
			terminal.Peek().Append("&(");
		}
 public abstract void VisitExecute(AndPredicate expression);
 public abstract void VisitEnter(AndPredicate expression);
 public abstract void VisitLeave(AndPredicate expression);