AST tmp2010_AST_in = (AST)_t;
AST tmp2009_AST_in = (AST)_t;
	public final void referencepoint(AST _t) throws RecognitionException {				AST referencepoint_AST_in = (_t == ASTNULL) ? null : (AST)_t;				field(_t);		_t = _retTree;		{		if (_t==null) _t=ASTNULL;		switch ( _t.getType()) {		case MINUS:		case PLUS:		{			{			if (_t==null) _t=ASTNULL;			switch ( _t.getType()) {			case PLUS:			{				AST tmp2010_AST_in = (AST)_t;				match(_t,PLUS);				_t = _t.getNextSibling();				break;			}			case MINUS:			{				AST tmp2011_AST_in = (AST)_t;				match(_t,MINUS);				_t = _t.getNextSibling();				break;			}			default:			{				throw new NoViableAltException(_t);			}			}			}			expression(_t);			_t = _retTree;			break;		}		case 3:		{			break;		}		default:		{			throw new NoViableAltException(_t);		}		}		}		_retTree = _t;	}