libcxx/test/std/input.output/iostreams.base/ios/iostate.flags/not.pass.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-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 // <ios>
  10
  11 // template <class charT, class traits> class basic_ios
  12
  13 // bool operator!() const;
  14
  15 #include <ios>
  16 #include <cassert>
  17
  18 #include "test_macros.h"
  19
  20 int 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 }