da79d6e177
The module std does not provide c-types in the global namespace. This means all these types need to be fully qualified. This is a first step to convert them by using sed. Since this is an automated conversion other types like uint64_t are kept as is. Note that tests in the directory libcxx/test/std/depr/depr.c.headers should not be converted automatically. This requires manual attention, there some test require testing uint32_t in the global namespace. These test should fail when using the std module, and pass when using the std.compat module. A similar issue occurs with atomic, atomic_uint32_t is specified as using atomic_uint32_t = atomic<uint32_t>; // freestanding So here too we need to keep the name in the global namespace in the tests. Reviewed By: ldionne, #libc Differential Revision: https://reviews.llvm.org/D145520
51 lines
1.5 KiB
C++
51 lines
1.5 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++03, c++11, c++14, c++17
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// enum class endian;
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// <bit>
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#include <bit>
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#include <cassert>
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#include <cstdint>
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#include <cstring>
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#include <type_traits>
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#include "test_macros.h"
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int main(int, char**) {
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static_assert(std::is_enum<std::endian>::value, "");
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// Check that E is a scoped enum by checking for conversions.
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typedef std::underlying_type<std::endian>::type UT;
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static_assert(!std::is_convertible<std::endian, UT>::value, "");
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// test that the enumeration values exist
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static_assert( std::endian::little == std::endian::little );
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static_assert( std::endian::big == std::endian::big );
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static_assert( std::endian::native == std::endian::native );
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static_assert( std::endian::little != std::endian::big );
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// Technically not required, but true on all existing machines
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static_assert( std::endian::native == std::endian::little ||
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std::endian::native == std::endian::big );
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// Try to check at runtime
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{
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std::uint32_t i = 0x01020304;
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char c[4];
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static_assert(sizeof(i) == sizeof(c));
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std::memcpy(c, &i, sizeof(c));
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assert ((c[0] == 1) == (std::endian::native == std::endian::big));
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}
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return 0;
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}
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