10b57cec5SDimitry Andric// -*- C++ -*- 2349cc55cSDimitry Andric//===----------------------------------------------------------------------===// 30b57cec5SDimitry Andric// 40b57cec5SDimitry Andric// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 50b57cec5SDimitry Andric// See https://llvm.org/LICENSE.txt for license information. 60b57cec5SDimitry Andric// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 70b57cec5SDimitry Andric// 80b57cec5SDimitry Andric//===----------------------------------------------------------------------===// 90b57cec5SDimitry Andric 100b57cec5SDimitry Andric#ifndef _LIBCPP_CSTDDEF 110b57cec5SDimitry Andric#define _LIBCPP_CSTDDEF 120b57cec5SDimitry Andric 130b57cec5SDimitry Andric/* 140b57cec5SDimitry Andric cstddef synopsis 150b57cec5SDimitry Andric 160b57cec5SDimitry AndricMacros: 170b57cec5SDimitry Andric 180b57cec5SDimitry Andric offsetof(type,member-designator) 190b57cec5SDimitry Andric NULL 200b57cec5SDimitry Andric 210b57cec5SDimitry Andricnamespace std 220b57cec5SDimitry Andric{ 230b57cec5SDimitry Andric 240b57cec5SDimitry AndricTypes: 250b57cec5SDimitry Andric 260b57cec5SDimitry Andric ptrdiff_t 270b57cec5SDimitry Andric size_t 285ffd83dbSDimitry Andric max_align_t // C++11 290b57cec5SDimitry Andric nullptr_t 300b57cec5SDimitry Andric byte // C++17 310b57cec5SDimitry Andric 320b57cec5SDimitry Andric} // std 330b57cec5SDimitry Andric 340b57cec5SDimitry Andric*/ 350b57cec5SDimitry Andric 3681ad6265SDimitry Andric#include <__assert> // all public C++ headers provide the assertion handler 370b57cec5SDimitry Andric#include <__config> 3881ad6265SDimitry Andric#include <__type_traits/enable_if.h> 3981ad6265SDimitry Andric#include <__type_traits/integral_constant.h> 4081ad6265SDimitry Andric#include <__type_traits/is_integral.h> 410b57cec5SDimitry Andric#include <version> 420b57cec5SDimitry Andric 43bdd1243dSDimitry Andric#include <stddef.h> 44bdd1243dSDimitry Andric 45bdd1243dSDimitry Andric#ifndef _LIBCPP_STDDEF_H 46bdd1243dSDimitry Andric# error <cstddef> tried including <stddef.h> but didn't find libc++'s <stddef.h> header. \ 47bdd1243dSDimitry Andric This usually means that your header search paths are not configured properly. \ 48bdd1243dSDimitry Andric The header search paths should contain the C++ Standard Library headers before \ 49bdd1243dSDimitry Andric any C Standard Library, and you are probably using compiler flags that make that \ 50bdd1243dSDimitry Andric not be the case. 51bdd1243dSDimitry Andric#endif 52bdd1243dSDimitry Andric 530b57cec5SDimitry Andric#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 540b57cec5SDimitry Andric# pragma GCC system_header 550b57cec5SDimitry Andric#endif 560b57cec5SDimitry Andric 570b57cec5SDimitry Andric_LIBCPP_BEGIN_NAMESPACE_STD 580b57cec5SDimitry Andric 5981ad6265SDimitry Andricusing ::nullptr_t; 60fe6060f1SDimitry Andricusing ::ptrdiff_t _LIBCPP_USING_IF_EXISTS; 61fe6060f1SDimitry Andricusing ::size_t _LIBCPP_USING_IF_EXISTS; 620b57cec5SDimitry Andric 635ffd83dbSDimitry Andric#if !defined(_LIBCPP_CXX03_LANG) 64fe6060f1SDimitry Andricusing ::max_align_t _LIBCPP_USING_IF_EXISTS; 655ffd83dbSDimitry Andric#endif 665ffd83dbSDimitry Andric 670b57cec5SDimitry Andric_LIBCPP_END_NAMESPACE_STD 680b57cec5SDimitry Andric 69*06c3fb27SDimitry Andric#if _LIBCPP_STD_VER >= 17 700b57cec5SDimitry Andricnamespace std // purposefully not versioned 710b57cec5SDimitry Andric{ 720b57cec5SDimitry Andricenum class byte : unsigned char {}; 730b57cec5SDimitry Andric 74bdd1243dSDimitry Andric_LIBCPP_HIDE_FROM_ABI constexpr byte operator| (byte __lhs, byte __rhs) noexcept 750b57cec5SDimitry Andric{ 760b57cec5SDimitry Andric return static_cast<byte>( 770b57cec5SDimitry Andric static_cast<unsigned char>( 780b57cec5SDimitry Andric static_cast<unsigned int>(__lhs) | static_cast<unsigned int>(__rhs) 790b57cec5SDimitry Andric )); 800b57cec5SDimitry Andric} 810b57cec5SDimitry Andric 82bdd1243dSDimitry Andric_LIBCPP_HIDE_FROM_ABI constexpr byte& operator|=(byte& __lhs, byte __rhs) noexcept 830b57cec5SDimitry Andric{ return __lhs = __lhs | __rhs; } 840b57cec5SDimitry Andric 85bdd1243dSDimitry Andric_LIBCPP_HIDE_FROM_ABI constexpr byte operator& (byte __lhs, byte __rhs) noexcept 860b57cec5SDimitry Andric{ 870b57cec5SDimitry Andric return static_cast<byte>( 880b57cec5SDimitry Andric static_cast<unsigned char>( 890b57cec5SDimitry Andric static_cast<unsigned int>(__lhs) & static_cast<unsigned int>(__rhs) 900b57cec5SDimitry Andric )); 910b57cec5SDimitry Andric} 920b57cec5SDimitry Andric 93bdd1243dSDimitry Andric_LIBCPP_HIDE_FROM_ABI constexpr byte& operator&=(byte& __lhs, byte __rhs) noexcept 940b57cec5SDimitry Andric{ return __lhs = __lhs & __rhs; } 950b57cec5SDimitry Andric 96bdd1243dSDimitry Andric_LIBCPP_HIDE_FROM_ABI constexpr byte operator^ (byte __lhs, byte __rhs) noexcept 970b57cec5SDimitry Andric{ 980b57cec5SDimitry Andric return static_cast<byte>( 990b57cec5SDimitry Andric static_cast<unsigned char>( 1000b57cec5SDimitry Andric static_cast<unsigned int>(__lhs) ^ static_cast<unsigned int>(__rhs) 1010b57cec5SDimitry Andric )); 1020b57cec5SDimitry Andric} 1030b57cec5SDimitry Andric 104bdd1243dSDimitry Andric_LIBCPP_HIDE_FROM_ABI constexpr byte& operator^=(byte& __lhs, byte __rhs) noexcept 1050b57cec5SDimitry Andric{ return __lhs = __lhs ^ __rhs; } 1060b57cec5SDimitry Andric 107bdd1243dSDimitry Andric_LIBCPP_HIDE_FROM_ABI constexpr byte operator~ (byte __b) noexcept 1080b57cec5SDimitry Andric{ 1090b57cec5SDimitry Andric return static_cast<byte>( 1100b57cec5SDimitry Andric static_cast<unsigned char>( 1110b57cec5SDimitry Andric ~static_cast<unsigned int>(__b) 1120b57cec5SDimitry Andric )); 1130b57cec5SDimitry Andric} 11481ad6265SDimitry Andric 11581ad6265SDimitry Andrictemplate <class _Tp> 11681ad6265SDimitry Andricusing _EnableByteOverload = __enable_if_t<is_integral<_Tp>::value, byte>; 11781ad6265SDimitry Andric 1185ffd83dbSDimitry Andrictemplate <class _Integer> 119bdd1243dSDimitry Andric_LIBCPP_HIDE_FROM_ABI constexpr _EnableByteOverload<_Integer> & 1205ffd83dbSDimitry Andric operator<<=(byte& __lhs, _Integer __shift) noexcept 1215ffd83dbSDimitry Andric { return __lhs = __lhs << __shift; } 1220b57cec5SDimitry Andric 1235ffd83dbSDimitry Andrictemplate <class _Integer> 124bdd1243dSDimitry Andric_LIBCPP_HIDE_FROM_ABI constexpr _EnableByteOverload<_Integer> 1255ffd83dbSDimitry Andric operator<< (byte __lhs, _Integer __shift) noexcept 1265ffd83dbSDimitry Andric { return static_cast<byte>(static_cast<unsigned char>(static_cast<unsigned int>(__lhs) << __shift)); } 1275ffd83dbSDimitry Andric 1285ffd83dbSDimitry Andrictemplate <class _Integer> 129bdd1243dSDimitry Andric_LIBCPP_HIDE_FROM_ABI constexpr _EnableByteOverload<_Integer> & 1305ffd83dbSDimitry Andric operator>>=(byte& __lhs, _Integer __shift) noexcept 1315ffd83dbSDimitry Andric { return __lhs = __lhs >> __shift; } 1325ffd83dbSDimitry Andric 1335ffd83dbSDimitry Andrictemplate <class _Integer> 134bdd1243dSDimitry Andric_LIBCPP_HIDE_FROM_ABI constexpr _EnableByteOverload<_Integer> 1355ffd83dbSDimitry Andric operator>> (byte __lhs, _Integer __shift) noexcept 1365ffd83dbSDimitry Andric { return static_cast<byte>(static_cast<unsigned char>(static_cast<unsigned int>(__lhs) >> __shift)); } 1375ffd83dbSDimitry Andric 1385ffd83dbSDimitry Andrictemplate <class _Integer, class = _EnableByteOverload<_Integer> > 139bdd1243dSDimitry Andric_LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr _Integer 1405ffd83dbSDimitry Andric to_integer(byte __b) noexcept { return static_cast<_Integer>(__b); } 1411fd87a68SDimitry Andric 1421fd87a68SDimitry Andric} // namespace std 1430b57cec5SDimitry Andric 1440b57cec5SDimitry Andric#endif 1450b57cec5SDimitry Andric 1460b57cec5SDimitry Andric#endif // _LIBCPP_CSTDDEF 147