_t = __t188;
_t = __t193;
	public final void buffercopystate(AST _t) throws RecognitionException {				AST buffercopystate_AST_in = (_t == ASTNULL) ? null : (AST)_t;				AST __t183 = _t;		AST tmp751_AST_in = (AST)_t;		match(_t,BUFFERCOPY);		_t = _t.getFirstChild();		tbl(_t,CQ.REF);		_t = _retTree;		{		if (_t==null) _t=ASTNULL;		switch ( _t.getType()) {		case EXCEPT:		{			AST __t185 = _t;			AST tmp752_AST_in = (AST)_t;			match(_t,EXCEPT);			_t = _t.getFirstChild();			{			_loop187:			do {				if (_t==null) _t=ASTNULL;				if ((_t.getType()==Field_ref)) {					fld1(_t,CQ.SYMBOL);					_t = _retTree;				}				else {					break _loop187;				}							} while (true);			}			_t = __t185;			_t = _t.getNextSibling();			break;		}		case USING:		{			AST __t188 = _t;			AST tmp753_AST_in = (AST)_t;			match(_t,USING);			_t = _t.getFirstChild();			{			int _cnt190=0;			_loop190:			do {				if (_t==null) _t=ASTNULL;				if ((_t.getType()==Field_ref)) {					fld1(_t,CQ.REF);					_t = _retTree;				}				else {					if ( _cnt190>=1 ) { break _loop190; } else {throw new NoViableAltException(_t);}				}								_cnt190++;			} while (true);			}			_t = __t188;			_t = _t.getNextSibling();			break;		}		case TO:		{			break;		}		default:		{			throw new NoViableAltException(_t);		}		}		}		AST tmp754_AST_in = (AST)_t;		match(_t,TO);		_t = _t.getNextSibling();		tbl(_t,CQ.UPDATING);		_t = _retTree;		{		if (_t==null) _t=ASTNULL;		switch ( _t.getType()) {		case ASSIGN:		{			AST __t192 = _t;			AST tmp755_AST_in = (AST)_t;			match(_t,ASSIGN);			_t = _t.getFirstChild();			assignment_list(_t);			_t = _retTree;			_t = __t192;			_t = _t.getNextSibling();			break;		}		case EOF:		case PERIOD:		case NOERROR_KW:		case NOLOBS:		{			break;		}		default:		{			throw new NoViableAltException(_t);		}		}		}		{		if (_t==null) _t=ASTNULL;		switch ( _t.getType()) {		case NOLOBS:		{			AST tmp756_AST_in = (AST)_t;			match(_t,NOLOBS);			_t = _t.getNextSibling();			break;		}		case EOF:		case PERIOD:		case NOERROR_KW:		{			break;		}		default:		{			throw new NoViableAltException(_t);		}		}		}		{		if (_t==null) _t=ASTNULL;		switch ( _t.getType()) {		case NOERROR_KW:		{			AST tmp757_AST_in = (AST)_t;			match(_t,NOERROR_KW);			_t = _t.getNextSibling();			break;		}		case EOF:		case PERIOD:		{			break;		}		default:		{			throw new NoViableAltException(_t);		}		}		}		state_end(_t);		_t = _retTree;		_t = __t183;		_t = _t.getNextSibling();		_retTree = _t;	}