docs: def p_iteration_statement_3(self, p):
          """
          iteration_statement \
              : FOR LPAREN expr_noin_opt SEMI expr_opt SEMI expr_opt RPAREN \
                    statement
              | FOR LPAREN VAR variable_declaration_list_noin SEMI expr_opt SEMI\
                    expr_opt RPAREN statement
          """
          if len(p) == 10:
              p[0] = ast.For(init=p[3], cond=p[5], count=p[7], statement=p[9])
          else:
              init = ast.VarStatement(p[4])
              p[0] = ast.For(init=init, cond=p[6], count=p[8], statement=p[10])