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//===----------------------------------------------------------------------===//
//
// 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, c++17
// enum class endian;
// <bit>
#include <bit>
#include <cassert>
#include <cstdint>
#include <cstring>
#include <type_traits>
#include "test_macros.h"
int main(int, char**) {
static_assert(std::is_enum<std::endian>::value, "");
// Check that E is a scoped enum by checking for conversions.
typedef std::underlying_type<std::endian>::type UT;
static_assert(!std::is_convertible<std::endian, UT>::value, "");
// test that the enumeration values exist
static_assert( std::endian::little == std::endian::little );
static_assert( std::endian::big == std::endian::big );
static_assert( std::endian::native == std::endian::native );
static_assert( std::endian::little != std::endian::big );
// Technically not required, but true on all existing machines
static_assert( std::endian::native == std::endian::little ||
std::endian::native == std::endian::big );
// Try to check at runtime
{
std::uint32_t i = 0x01020304;
char c[4];
static_assert(sizeof(i) == sizeof(c));
std::memcpy(c, &i, sizeof(c));
assert ((c[0] == 1) == (std::endian::native == std::endian::big));
}
return 0;
}
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