libstdc++
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00001 // -*- C++ -*- forwarding header. 00002 00003 // Copyright (C) 1997-2019 Free Software Foundation, Inc. 00004 // 00005 // This file is part of the GNU ISO C++ Library. This library is free 00006 // software; you can redistribute it and/or modify it under the 00007 // terms of the GNU General Public License as published by the 00008 // Free Software Foundation; either version 3, or (at your option) 00009 // any later version. 00010 00011 // This library is distributed in the hope that it will be useful, 00012 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00014 // GNU General Public License for more details. 00015 00016 // Under Section 7 of GPL version 3, you are granted additional 00017 // permissions described in the GCC Runtime Library Exception, version 00018 // 3.1, as published by the Free Software Foundation. 00019 00020 // You should have received a copy of the GNU General Public License and 00021 // a copy of the GCC Runtime Library Exception along with this program; 00022 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 00023 // <http://www.gnu.org/licenses/>. 00024 00025 /** @file cstddef 00026 * This is a Standard C++ Library file. You should @c \#include this file 00027 * in your programs, rather than any of the @a *.h implementation files. 00028 * 00029 * This is the C++ version of the Standard C Library header @c stddef.h, 00030 * and its contents are (mostly) the same as that header, but are all 00031 * contained in the namespace @c std (except for names which are defined 00032 * as macros in C). 00033 */ 00034 00035 // 00036 // ISO C++ 14882: 18.1 Types 00037 // 00038 00039 #ifndef _GLIBCXX_CSTDDEF 00040 #define _GLIBCXX_CSTDDEF 1 00041 00042 #pragma GCC system_header 00043 00044 #undef __need_wchar_t 00045 #undef __need_ptrdiff_t 00046 #undef __need_size_t 00047 #undef __need_NULL 00048 #undef __need_wint_t 00049 #include <bits/c++config.h> 00050 #include <stddef.h> 00051 00052 extern "C++" 00053 { 00054 #if __cplusplus >= 201103L 00055 namespace std 00056 { 00057 // We handle size_t, ptrdiff_t, and nullptr_t in c++config.h. 00058 using ::max_align_t; 00059 } 00060 #endif // C++11 00061 00062 #if __cplusplus >= 201703L 00063 namespace std 00064 { 00065 _GLIBCXX_BEGIN_NAMESPACE_VERSION 00066 #define __cpp_lib_byte 201603 00067 00068 /// std::byte 00069 enum class byte : unsigned char {}; 00070 00071 template<typename _IntegerType> struct __byte_operand { }; 00072 template<> struct __byte_operand<bool> { using __type = byte; }; 00073 template<> struct __byte_operand<char> { using __type = byte; }; 00074 template<> struct __byte_operand<signed char> { using __type = byte; }; 00075 template<> struct __byte_operand<unsigned char> { using __type = byte; }; 00076 #ifdef _GLIBCXX_USE_WCHAR_T 00077 template<> struct __byte_operand<wchar_t> { using __type = byte; }; 00078 #endif 00079 #ifdef _GLIBCXX_USE_CHAR8_T 00080 template<> struct __byte_operand<char8_t> { using __type = byte; }; 00081 #endif 00082 template<> struct __byte_operand<char16_t> { using __type = byte; }; 00083 template<> struct __byte_operand<char32_t> { using __type = byte; }; 00084 template<> struct __byte_operand<short> { using __type = byte; }; 00085 template<> struct __byte_operand<unsigned short> { using __type = byte; }; 00086 template<> struct __byte_operand<int> { using __type = byte; }; 00087 template<> struct __byte_operand<unsigned int> { using __type = byte; }; 00088 template<> struct __byte_operand<long> { using __type = byte; }; 00089 template<> struct __byte_operand<unsigned long> { using __type = byte; }; 00090 template<> struct __byte_operand<long long> { using __type = byte; }; 00091 template<> struct __byte_operand<unsigned long long> { using __type = byte; }; 00092 #if defined(__GLIBCXX_TYPE_INT_N_0) 00093 template<> struct __byte_operand<__GLIBCXX_TYPE_INT_N_0> 00094 { using __type = byte; }; 00095 template<> struct __byte_operand<unsigned __GLIBCXX_TYPE_INT_N_0> 00096 { using __type = byte; }; 00097 #endif 00098 #if defined(__GLIBCXX_TYPE_INT_N_1) 00099 template<> struct __byte_operand<__GLIBCXX_TYPE_INT_N_1> 00100 { using __type = byte; }; 00101 template<> struct __byte_operand<unsigned __GLIBCXX_TYPE_INT_N_1> 00102 { using __type = byte; }; 00103 #endif 00104 #if defined(__GLIBCXX_TYPE_INT_N_2) 00105 template<> struct __byte_operand<__GLIBCXX_TYPE_INT_N_2> 00106 { using __type = byte; }; 00107 template<> struct __byte_operand<unsigned __GLIBCXX_TYPE_INT_N_2> 00108 { using __type = byte; }; 00109 #endif 00110 template<typename _IntegerType> 00111 struct __byte_operand<const _IntegerType> 00112 : __byte_operand<_IntegerType> { }; 00113 template<typename _IntegerType> 00114 struct __byte_operand<volatile _IntegerType> 00115 : __byte_operand<_IntegerType> { }; 00116 template<typename _IntegerType> 00117 struct __byte_operand<const volatile _IntegerType> 00118 : __byte_operand<_IntegerType> { }; 00119 00120 template<typename _IntegerType> 00121 using __byte_op_t = typename __byte_operand<_IntegerType>::__type; 00122 00123 template<typename _IntegerType> 00124 constexpr __byte_op_t<_IntegerType>& 00125 operator<<=(byte& __b, _IntegerType __shift) noexcept 00126 { return __b = byte(static_cast<unsigned char>(__b) << __shift); } 00127 00128 template<typename _IntegerType> 00129 constexpr __byte_op_t<_IntegerType> 00130 operator<<(byte __b, _IntegerType __shift) noexcept 00131 { return byte(static_cast<unsigned char>(__b) << __shift); } 00132 00133 template<typename _IntegerType> 00134 constexpr __byte_op_t<_IntegerType>& 00135 operator>>=(byte& __b, _IntegerType __shift) noexcept 00136 { return __b = byte(static_cast<unsigned char>(__b) >> __shift); } 00137 00138 template<typename _IntegerType> 00139 constexpr __byte_op_t<_IntegerType> 00140 operator>>(byte __b, _IntegerType __shift) noexcept 00141 { return byte(static_cast<unsigned char>(__b) >> __shift); } 00142 00143 constexpr byte& 00144 operator|=(byte& __l, byte __r) noexcept 00145 { 00146 return __l = 00147 byte(static_cast<unsigned char>(__l) | static_cast<unsigned char>(__r)); 00148 } 00149 00150 constexpr byte 00151 operator|(byte __l, byte __r) noexcept 00152 { 00153 return 00154 byte(static_cast<unsigned char>(__l) | static_cast<unsigned char>(__r)); 00155 } 00156 00157 constexpr byte& 00158 operator&=(byte& __l, byte __r) noexcept 00159 { 00160 return __l = 00161 byte(static_cast<unsigned char>(__l) & static_cast<unsigned char>(__r)); 00162 } 00163 00164 constexpr byte 00165 operator&(byte __l, byte __r) noexcept 00166 { 00167 return 00168 byte(static_cast<unsigned char>(__l) & static_cast<unsigned char>(__r)); 00169 } 00170 00171 constexpr byte& 00172 operator^=(byte& __l, byte __r) noexcept 00173 { 00174 return __l = 00175 byte(static_cast<unsigned char>(__l) ^ static_cast<unsigned char>(__r)); 00176 } 00177 00178 constexpr byte 00179 operator^(byte __l, byte __r) noexcept 00180 { 00181 return 00182 byte(static_cast<unsigned char>(__l) ^ static_cast<unsigned char>(__r)); 00183 } 00184 00185 constexpr byte 00186 operator~(byte __b) noexcept 00187 { return byte(~static_cast<unsigned char>(__b)); } 00188 00189 template<typename _IntegerType> 00190 constexpr _IntegerType 00191 to_integer(__byte_op_t<_IntegerType> __b) noexcept 00192 { return _IntegerType(__b); } 00193 00194 _GLIBCXX_END_NAMESPACE_VERSION 00195 } // namespace std 00196 #endif // C++17 00197 } // extern "C++" 00198 00199 #endif // _GLIBCXX_CSTDDEF