libstdc++-v3/testsuite/19_diagnostics/error_code/operators/not_equal.cc

// { dg-do run { target c++11 } }
// { dg-additional-options "-static-libstdc++" { target *-*-mingw* } }
// 2007-08-22 Benjamin Kosnik  <bkoz@redhat.com>

// Copyright (C) 2007-2020 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.

// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3.  If not see
// <http://www.gnu.org/licenses/>.

#include <system_error>
#include <testsuite_error.h>

int main()
{
  std::error_code e1;
  std::error_code e2(std::make_error_code(std::errc::operation_not_supported));

  VERIFY( !(e1 != e1) );
  VERIFY( e1 != e2 );

  const __gnu_test::test_category cat;
  std::error_code e3(e2.value(), cat);
  VERIFY( e2 != e3 );

  std::error_code e4(std::make_error_code(std::errc::invalid_argument));
  VERIFY( e4 != e2 );
}