Expression prev=null; //Will tell the prvious expression added;
BinaryExpression addTo=null; //Will tell where to add
BinarySymbol op=null;
expression =new BinaryExpression(null,-1,null);
addTo=expression;
try {
// C:\\Users\\line47\\workspace\\ObjCFYPA\\src\\com\\icona\\antlr\\main\\ObjectiveC.g:1126:2: (exp1= multiplicative_expression ( ( '+' | '-' ) expx= multiplicative_expression )* )