AST tmp1990_AST_in = (AST)_t;
AST tmp1989_AST_in = (AST)_t;
	public final void assign_opt(AST _t) throws RecognitionException {				AST assign_opt_AST_in = (_t == ASTNULL) ? null : (AST)_t;				AST __t402 = _t;		AST tmp1989_AST_in = (AST)_t;		match(_t,ASSIGN);		_t = _t.getFirstChild();		{		int _cnt405=0;		_loop405:		do {			if (_t==null) _t=ASTNULL;			if ((_t.getType()==EQUAL)) {				AST __t404 = _t;				AST tmp1990_AST_in = (AST)_t;				match(_t,EQUAL);				_t = _t.getFirstChild();				AST tmp1991_AST_in = (AST)_t;				if ( _t==null ) throw new MismatchedTokenException();				_t = _t.getNextSibling();				expression(_t);				_t = _retTree;				_t = __t404;				_t = _t.getNextSibling();			}			else {				if ( _cnt405>=1 ) { break _loop405; } else {throw new NoViableAltException(_t);}			}						_cnt405++;		} while (true);		}		_t = __t402;		_t = _t.getNextSibling();		_retTree = _t;	}