object_const_list : object_const_list COMMA IDENT
                             | IDENT

def p_object_const_list(self, p):
        '''object_const_list : object_const_list COMMA IDENT
                             | IDENT'''
        if len(p) == 4:
            p[1].append(p[3])
            p[0] = p[1]
        elif len(p) == 2:
            p[0] = [p[1]]