_t = __t1777;
_t = __t1778;
	public final void compile_append(AST _t) throws RecognitionException {				AST compile_append_AST_in = (_t == ASTNULL) ? null : (AST)_t;				AST __t1777 = _t;		AST tmp2294_AST_in = (AST)_t;		match(_t,APPEND);		_t = _t.getFirstChild();		{		if (_t==null) _t=ASTNULL;		switch ( _t.getType()) {		case EQUAL:		{			AST __t1779 = _t;			AST tmp2295_AST_in = (AST)_t;			match(_t,EQUAL);			_t = _t.getFirstChild();			expression(_t);			_t = _retTree;			_t = __t1779;			_t = _t.getNextSibling();			break;		}		case 3:		{			break;		}		default:		{			throw new NoViableAltException(_t);		}		}		}		_t = __t1777;		_t = _t.getNextSibling();		_retTree = _t;	}