2 //===----------------------------------------------------------------------===//
4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5 // See https://llvm.org/LICENSE.txt for license information.
6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
8 //===----------------------------------------------------------------------===//
10 #ifndef _LIBCPP_CSTDDEF
11 #define _LIBCPP_CSTDDEF
18 offsetof(type,member-designator)
36 #include <__cxx03/__config>
37 #include <__cxx03/__type_traits/enable_if.h>
38 #include <__cxx03/__type_traits/integral_constant.h>
39 #include <__cxx03/__type_traits/is_integral.h>
40 #include <__cxx03/version>
42 #include <__cxx03/stddef.h>
44 #ifndef _LIBCPP_STDDEF_H
45 # error <cstddef> tried including <stddef.h> but didn't find libc++'s <stddef.h> header. \
46 This usually means that your header search paths are not configured properly. \
47 The header search paths should contain the C++ Standard Library headers before \
48 any C Standard Library, and you are probably using compiler flags that make that \
52 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
53 # pragma GCC system_header
56 _LIBCPP_BEGIN_NAMESPACE_STD
59 using ::ptrdiff_t _LIBCPP_USING_IF_EXISTS;
60 using ::size_t _LIBCPP_USING_IF_EXISTS;
62 #if !defined(_LIBCPP_CXX03_LANG)
63 using ::max_align_t _LIBCPP_USING_IF_EXISTS;
66 _LIBCPP_END_NAMESPACE_STD
68 #if _LIBCPP_STD_VER >= 17
69 namespace std // purposefully not versioned
71 enum class byte : unsigned char {};
73 _LIBCPP_HIDE_FROM_ABI inline constexpr byte operator|(byte __lhs, byte __rhs) noexcept {
74 return static_cast<byte>(
75 static_cast<unsigned char>(static_cast<unsigned int>(__lhs) | static_cast<unsigned int>(__rhs)));
78 _LIBCPP_HIDE_FROM_ABI inline constexpr byte& operator|=(byte& __lhs, byte __rhs) noexcept {
79 return __lhs = __lhs | __rhs;
82 _LIBCPP_HIDE_FROM_ABI inline constexpr byte operator&(byte __lhs, byte __rhs) noexcept {
83 return static_cast<byte>(
84 static_cast<unsigned char>(static_cast<unsigned int>(__lhs) & static_cast<unsigned int>(__rhs)));
87 _LIBCPP_HIDE_FROM_ABI inline constexpr byte& operator&=(byte& __lhs, byte __rhs) noexcept {
88 return __lhs = __lhs & __rhs;
91 _LIBCPP_HIDE_FROM_ABI inline constexpr byte operator^(byte __lhs, byte __rhs) noexcept {
92 return static_cast<byte>(
93 static_cast<unsigned char>(static_cast<unsigned int>(__lhs) ^ static_cast<unsigned int>(__rhs)));
96 _LIBCPP_HIDE_FROM_ABI inline constexpr byte& operator^=(byte& __lhs, byte __rhs) noexcept {
97 return __lhs = __lhs ^ __rhs;
100 _LIBCPP_HIDE_FROM_ABI inline constexpr byte operator~(byte __b) noexcept {
101 return static_cast<byte>(static_cast<unsigned char>(~static_cast<unsigned int>(__b)));
104 template <class _Integer, __enable_if_t<is_integral<_Integer>::value, int> = 0>
105 _LIBCPP_HIDE_FROM_ABI constexpr byte& operator<<=(byte& __lhs, _Integer __shift) noexcept {
106 return __lhs = __lhs << __shift;
109 template <class _Integer, __enable_if_t<is_integral<_Integer>::value, int> = 0>
110 _LIBCPP_HIDE_FROM_ABI constexpr byte operator<<(byte __lhs, _Integer __shift) noexcept {
111 return static_cast<byte>(static_cast<unsigned char>(static_cast<unsigned int>(__lhs) << __shift));
114 template <class _Integer, __enable_if_t<is_integral<_Integer>::value, int> = 0>
115 _LIBCPP_HIDE_FROM_ABI constexpr byte& operator>>=(byte& __lhs, _Integer __shift) noexcept {
116 return __lhs = __lhs >> __shift;
119 template <class _Integer, __enable_if_t<is_integral<_Integer>::value, int> = 0>
120 _LIBCPP_HIDE_FROM_ABI constexpr byte operator>>(byte __lhs, _Integer __shift) noexcept {
121 return static_cast<byte>(static_cast<unsigned char>(static_cast<unsigned int>(__lhs) >> __shift));
124 template <class _Integer, __enable_if_t<is_integral<_Integer>::value, int> = 0>
125 [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr _Integer to_integer(byte __b) noexcept {
126 return static_cast<_Integer>(__b);
133 #endif // _LIBCPP_CSTDDEF