test/std/input.output/filesystems/fs.enum/enum.perm_options.pass.cpp

//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

// UNSUPPORTED: c++03, c++11, c++14

// <filesystem>

// enum class perm_options;

#include <filesystem>
#include <type_traits>
#include <cassert>

#include "test_macros.h"
#include "check_bitmask_types.h"
namespace fs = std::filesystem;

constexpr fs::perm_options ME(int val) {
  return static_cast<fs::perm_options>(val);
}

int main(int, char**) {
  typedef fs::perm_options E;
  static_assert(std::is_enum<E>::value, "");

  // Check that E is a scoped enum by checking for conversions.
  typedef std::underlying_type<E>::type UT;
  static_assert(!std::is_convertible<E, UT>::value, "");

  LIBCPP_STATIC_ASSERT(std::is_same<UT, unsigned char >::value, ""); // Implementation detail

  typedef check_bitmask_type<E, E::replace, E::nofollow> BitmaskTester;
  assert(BitmaskTester::check());

  static_assert(
        E::replace  == ME(1) &&
        E::add      == ME(2) &&
        E::remove   == ME(4) &&
        E::nofollow == ME(8),
        "Expected enumeration values do not match");

  return 0;
}