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