29 lines · cpp
1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9// <ios>10 11// template <class charT, class traits> class basic_ios12 13// bool operator!() const;14 15#include <ios>16#include <cassert>17 18#include "test_macros.h"19 20int main(int, char**)21{22 std::ios ios(0);23 assert(!ios == ios.fail());24 ios.setstate(std::ios::failbit);25 assert(!ios == ios.fail());26 27 return 0;28}29