AST __t1575 = _t;
AST __t1560 = _t;
	public final void expression(AST _t) throws RecognitionException {				AST expression_AST_in = (_t == ASTNULL) ? null : (AST)_t;				if (_t==null) _t=ASTNULL;		switch ( _t.getType()) {		case OR:		{			AST __t1568 = _t;			AST tmp24_AST_in = (AST)_t;			match(_t,OR);			_t = _t.getFirstChild();			expression(_t);			_t = _retTree;			expression(_t);			_t = _retTree;			_t = __t1568;			_t = _t.getNextSibling();			break;		}		case AND:		{			AST __t1569 = _t;			AST tmp25_AST_in = (AST)_t;			match(_t,AND);			_t = _t.getFirstChild();			expression(_t);			_t = _retTree;			expression(_t);			_t = _retTree;			_t = __t1569;			_t = _t.getNextSibling();			break;		}		case NOT:		{			AST __t1570 = _t;			AST tmp26_AST_in = (AST)_t;			match(_t,NOT);			_t = _t.getFirstChild();			expression(_t);			_t = _retTree;			_t = __t1570;			_t = _t.getNextSibling();			break;		}		case MATCHES:		{			AST __t1571 = _t;			AST tmp27_AST_in = (AST)_t;			match(_t,MATCHES);			_t = _t.getFirstChild();			expression(_t);			_t = _retTree;			expression(_t);			_t = _retTree;			_t = __t1571;			_t = _t.getNextSibling();			break;		}		case BEGINS:		{			AST __t1572 = _t;			AST tmp28_AST_in = (AST)_t;			match(_t,BEGINS);			_t = _t.getFirstChild();			expression(_t);			_t = _retTree;			expression(_t);			_t = _retTree;			_t = __t1572;			_t = _t.getNextSibling();			break;		}		case CONTAINS:		{			AST __t1573 = _t;			AST tmp29_AST_in = (AST)_t;			match(_t,CONTAINS);			_t = _t.getFirstChild();			expression(_t);			_t = _retTree;			expression(_t);			_t = _retTree;			_t = __t1573;			_t = _t.getNextSibling();			break;		}		case EQ:		{			AST __t1574 = _t;			AST tmp30_AST_in = (AST)_t;			match(_t,EQ);			_t = _t.getFirstChild();			expression(_t);			_t = _retTree;			expression(_t);			_t = _retTree;			_t = __t1574;			_t = _t.getNextSibling();			break;		}		case NE:		{			AST __t1575 = _t;			AST tmp31_AST_in = (AST)_t;			match(_t,NE);			_t = _t.getFirstChild();			expression(_t);			_t = _retTree;			expression(_t);			_t = _retTree;			_t = __t1575;			_t = _t.getNextSibling();			break;		}		case GTHAN:		{			AST __t1576 = _t;			AST tmp32_AST_in = (AST)_t;			match(_t,GTHAN);			_t = _t.getFirstChild();			expression(_t);			_t = _retTree;			expression(_t);			_t = _retTree;			_t = __t1576;			_t = _t.getNextSibling();			break;		}		case GE:		{			AST __t1577 = _t;			AST tmp33_AST_in = (AST)_t;			match(_t,GE);			_t = _t.getFirstChild();			expression(_t);			_t = _retTree;			expression(_t);			_t = _retTree;			_t = __t1577;			_t = _t.getNextSibling();			break;		}		case LTHAN:		{			AST __t1578 = _t;			AST tmp34_AST_in = (AST)_t;			match(_t,LTHAN);			_t = _t.getFirstChild();			expression(_t);			_t = _retTree;			expression(_t);			_t = _retTree;			_t = __t1578;			_t = _t.getNextSibling();			break;		}		case LE:		{			AST __t1579 = _t;			AST tmp35_AST_in = (AST)_t;			match(_t,LE);			_t = _t.getFirstChild();			expression(_t);			_t = _retTree;			expression(_t);			_t = _retTree;			_t = __t1579;			_t = _t.getNextSibling();			break;		}		case PLUS:		{			AST __t1580 = _t;			AST tmp36_AST_in = (AST)_t;			match(_t,PLUS);			_t = _t.getFirstChild();			expression(_t);			_t = _retTree;			expression(_t);			_t = _retTree;			_t = __t1580;			_t = _t.getNextSibling();			break;		}		case MINUS:		{			AST __t1581 = _t;			AST tmp37_AST_in = (AST)_t;			match(_t,MINUS);			_t = _t.getFirstChild();			expression(_t);			_t = _retTree;			expression(_t);			_t = _retTree;			_t = __t1581;			_t = _t.getNextSibling();			break;		}		case MULTIPLY:		{			AST __t1582 = _t;			AST tmp38_AST_in = (AST)_t;			match(_t,MULTIPLY);			_t = _t.getFirstChild();			expression(_t);			_t = _retTree;			expression(_t);			_t = _retTree;			_t = __t1582;			_t = _t.getNextSibling();			break;		}		case DIVIDE:		{			AST __t1583 = _t;			AST tmp39_AST_in = (AST)_t;			match(_t,DIVIDE);			_t = _t.getFirstChild();			expression(_t);			_t = _retTree;			expression(_t);			_t = _retTree;			_t = __t1583;			_t = _t.getNextSibling();			break;		}		case MODULO:		{			AST __t1584 = _t;			AST tmp40_AST_in = (AST)_t;			match(_t,MODULO);			_t = _t.getFirstChild();			expression(_t);			_t = _retTree;			expression(_t);			_t = _retTree;			_t = __t1584;			_t = _t.getNextSibling();			break;		}		case UNARY_MINUS:		{			AST __t1585 = _t;			AST tmp41_AST_in = (AST)_t;			match(_t,UNARY_MINUS);			_t = _t.getFirstChild();			exprt(_t);			_t = _retTree;			_t = __t1585;			_t = _t.getNextSibling();			break;		}		case UNARY_PLUS:		{			AST __t1586 = _t;			AST tmp42_AST_in = (AST)_t;			match(_t,UNARY_PLUS);			_t = _t.getFirstChild();			exprt(_t);			_t = _retTree;			_t = __t1586;			_t = _t.getNextSibling();			break;		}		default:			if (_t==null) _t=ASTNULL;			if ((_tokenSet_1.member(_t.getType()))) {				exprt(_t);				_t = _retTree;			}		else {			throw new NoViableAltException(_t);		}		}		_retTree = _t;	}