1// -*- C++ -*- forwarding header. 2 3// Copyright (C) 1997-2019 Free Software Foundation, Inc. 4// 5// This file is part of the GNU ISO C++ Library. This library is free 6// software; you can redistribute it and/or modify it under the 7// terms of the GNU General Public License as published by the 8// Free Software Foundation; either version 3, or (at your option) 9// any later version. 10 11// This library is distributed in the hope that it will be useful, 12// but WITHOUT ANY WARRANTY; without even the implied warranty of 13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14// GNU General Public License for more details. 15 16// Under Section 7 of GPL version 3, you are granted additional 17// permissions described in the GCC Runtime Library Exception, version 18// 3.1, as published by the Free Software Foundation. 19 20// You should have received a copy of the GNU General Public License and 21// a copy of the GCC Runtime Library Exception along with this program; 22// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 23// <http://www.gnu.org/licenses/>. 24 25/** @file cstddef 26 * This is a Standard C++ Library file. You should @c \#include this file 27 * in your programs, rather than any of the @a *.h implementation files. 28 * 29 * This is the C++ version of the Standard C Library header @c stddef.h, 30 * and its contents are (mostly) the same as that header, but are all 31 * contained in the namespace @c std (except for names which are defined 32 * as macros in C). 33 */ 34 35// 36// ISO C++ 14882: 18.1 Types 37// 38 39#ifndef _GLIBCXX_CSTDDEF 40#define _GLIBCXX_CSTDDEF 1 41 42#pragma GCC system_header 43 44#undef __need_wchar_t 45#undef __need_ptrdiff_t 46#undef __need_size_t 47#undef __need_NULL 48#undef __need_wint_t 49#include <bits/c++config.h> 50#include <stddef.h> 51 52extern "C++" 53{ 54#if __cplusplus >= 201103L 55namespace std 56{ 57 // We handle size_t, ptrdiff_t, and nullptr_t in c++config.h. 58 using ::max_align_t; 59} 60#endif // C++11 61 62#if __cplusplus >= 201703L 63namespace std 64{ 65_GLIBCXX_BEGIN_NAMESPACE_VERSION 66#define __cpp_lib_byte 201603 67 68 /// std::byte 69 enum class byte : unsigned char {}; 70 71 template<typename _IntegerType> struct __byte_operand { }; 72 template<> struct __byte_operand<bool> { using __type = byte; }; 73 template<> struct __byte_operand<char> { using __type = byte; }; 74 template<> struct __byte_operand<signed char> { using __type = byte; }; 75 template<> struct __byte_operand<unsigned char> { using __type = byte; }; 76#ifdef _GLIBCXX_USE_WCHAR_T 77 template<> struct __byte_operand<wchar_t> { using __type = byte; }; 78#endif 79#ifdef _GLIBCXX_USE_CHAR8_T 80 template<> struct __byte_operand<char8_t> { using __type = byte; }; 81#endif 82 template<> struct __byte_operand<char16_t> { using __type = byte; }; 83 template<> struct __byte_operand<char32_t> { using __type = byte; }; 84 template<> struct __byte_operand<short> { using __type = byte; }; 85 template<> struct __byte_operand<unsigned short> { using __type = byte; }; 86 template<> struct __byte_operand<int> { using __type = byte; }; 87 template<> struct __byte_operand<unsigned int> { using __type = byte; }; 88 template<> struct __byte_operand<long> { using __type = byte; }; 89 template<> struct __byte_operand<unsigned long> { using __type = byte; }; 90 template<> struct __byte_operand<long long> { using __type = byte; }; 91 template<> struct __byte_operand<unsigned long long> { using __type = byte; }; 92#if defined(__GLIBCXX_TYPE_INT_N_0) 93 template<> struct __byte_operand<__GLIBCXX_TYPE_INT_N_0> 94 { using __type = byte; }; 95 template<> struct __byte_operand<unsigned __GLIBCXX_TYPE_INT_N_0> 96 { using __type = byte; }; 97#endif 98#if defined(__GLIBCXX_TYPE_INT_N_1) 99 template<> struct __byte_operand<__GLIBCXX_TYPE_INT_N_1> 100 { using __type = byte; }; 101 template<> struct __byte_operand<unsigned __GLIBCXX_TYPE_INT_N_1> 102 { using __type = byte; }; 103#endif 104#if defined(__GLIBCXX_TYPE_INT_N_2) 105 template<> struct __byte_operand<__GLIBCXX_TYPE_INT_N_2> 106 { using __type = byte; }; 107 template<> struct __byte_operand<unsigned __GLIBCXX_TYPE_INT_N_2> 108 { using __type = byte; }; 109#endif 110 template<typename _IntegerType> 111 struct __byte_operand<const _IntegerType> 112 : __byte_operand<_IntegerType> { }; 113 template<typename _IntegerType> 114 struct __byte_operand<volatile _IntegerType> 115 : __byte_operand<_IntegerType> { }; 116 template<typename _IntegerType> 117 struct __byte_operand<const volatile _IntegerType> 118 : __byte_operand<_IntegerType> { }; 119 120 template<typename _IntegerType> 121 using __byte_op_t = typename __byte_operand<_IntegerType>::__type; 122 123 template<typename _IntegerType> 124 constexpr __byte_op_t<_IntegerType>& 125 operator<<=(byte& __b, _IntegerType __shift) noexcept 126 { return __b = byte(static_cast<unsigned char>(__b) << __shift); } 127 128 template<typename _IntegerType> 129 constexpr __byte_op_t<_IntegerType> 130 operator<<(byte __b, _IntegerType __shift) noexcept 131 { return byte(static_cast<unsigned char>(__b) << __shift); } 132 133 template<typename _IntegerType> 134 constexpr __byte_op_t<_IntegerType>& 135 operator>>=(byte& __b, _IntegerType __shift) noexcept 136 { return __b = byte(static_cast<unsigned char>(__b) >> __shift); } 137 138 template<typename _IntegerType> 139 constexpr __byte_op_t<_IntegerType> 140 operator>>(byte __b, _IntegerType __shift) noexcept 141 { return byte(static_cast<unsigned char>(__b) >> __shift); } 142 143 constexpr byte& 144 operator|=(byte& __l, byte __r) noexcept 145 { 146 return __l = 147 byte(static_cast<unsigned char>(__l) | static_cast<unsigned char>(__r)); 148 } 149 150 constexpr byte 151 operator|(byte __l, byte __r) noexcept 152 { 153 return 154 byte(static_cast<unsigned char>(__l) | static_cast<unsigned char>(__r)); 155 } 156 157 constexpr byte& 158 operator&=(byte& __l, byte __r) noexcept 159 { 160 return __l = 161 byte(static_cast<unsigned char>(__l) & static_cast<unsigned char>(__r)); 162 } 163 164 constexpr byte 165 operator&(byte __l, byte __r) noexcept 166 { 167 return 168 byte(static_cast<unsigned char>(__l) & static_cast<unsigned char>(__r)); 169 } 170 171 constexpr byte& 172 operator^=(byte& __l, byte __r) noexcept 173 { 174 return __l = 175 byte(static_cast<unsigned char>(__l) ^ static_cast<unsigned char>(__r)); 176 } 177 178 constexpr byte 179 operator^(byte __l, byte __r) noexcept 180 { 181 return 182 byte(static_cast<unsigned char>(__l) ^ static_cast<unsigned char>(__r)); 183 } 184 185 constexpr byte 186 operator~(byte __b) noexcept 187 { return byte(~static_cast<unsigned char>(__b)); } 188 189 template<typename _IntegerType> 190 constexpr _IntegerType 191 to_integer(__byte_op_t<_IntegerType> __b) noexcept 192 { return _IntegerType(__b); } 193 194_GLIBCXX_END_NAMESPACE_VERSION 195} // namespace std 196#endif // C++17 197} // extern "C++" 198 199#endif // _GLIBCXX_CSTDDEF 200