1// -*- C++ -*- forwarding header.
2
3// Copyright (C) 1997-2017 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
52#if __cplusplus >= 201103L
53namespace std
54{
55 // We handle size_t, ptrdiff_t, and nullptr_t in c++config.h.
56 using ::max_align_t;
57}
58#endif
59
60#if __cplusplus >= 201703L
61namespace std
62{
63#define __cpp_lib_byte 201603
64
65 /// std::byte
66 enum class byte : unsigned char {};
67
68 template<typename _IntegerType> struct __byte_operand;
69 template<> struct __byte_operand<bool> { using __type = byte; };
70 template<> struct __byte_operand<char> { using __type = byte; };
71 template<> struct __byte_operand<signed char> { using __type = byte; };
72 template<> struct __byte_operand<unsigned char> { using __type = byte; };
73#ifdef _GLIBCXX_USE_WCHAR_T
74 template<> struct __byte_operand<wchar_t> { using __type = byte; };
75#endif
76 template<> struct __byte_operand<char16_t> { using __type = byte; };
77 template<> struct __byte_operand<char32_t> { using __type = byte; };
78 template<> struct __byte_operand<short> { using __type = byte; };
79 template<> struct __byte_operand<unsigned short> { using __type = byte; };
80 template<> struct __byte_operand<int> { using __type = byte; };
81 template<> struct __byte_operand<unsigned int> { using __type = byte; };
82 template<> struct __byte_operand<long> { using __type = byte; };
83 template<> struct __byte_operand<unsigned long> { using __type = byte; };
84 template<> struct __byte_operand<long long> { using __type = byte; };
85 template<> struct __byte_operand<unsigned long long> { using __type = byte; };
86#if defined(__GLIBCXX_TYPE_INT_N_0)
87 template<> struct __byte_operand<__GLIBCXX_TYPE_INT_N_0>
88 { using __type = byte; };
89 template<> struct __byte_operand<unsigned __GLIBCXX_TYPE_INT_N_0>
90 { using __type = byte; };
91#endif
92#if defined(__GLIBCXX_TYPE_INT_N_1)
93 template<> struct __byte_operand<__GLIBCXX_TYPE_INT_N_1>
94 { using __type = byte; };
95 template<> struct __byte_operand<unsigned __GLIBCXX_TYPE_INT_N_1>
96 { using __type = byte; };
97#endif
98#if defined(__GLIBCXX_TYPE_INT_N_2)
99 template<> struct __byte_operand<__GLIBCXX_TYPE_INT_N_2>
100 { using __type = byte; };
101 template<> struct __byte_operand<unsigned __GLIBCXX_TYPE_INT_N_2>
102 { using __type = byte; };
103#endif
104 template<typename _IntegerType>
105 struct __byte_operand<const _IntegerType>
106 : __byte_operand<_IntegerType> { };
107 template<typename _IntegerType>
108 struct __byte_operand<volatile _IntegerType>
109 : __byte_operand<_IntegerType> { };
110 template<typename _IntegerType>
111 struct __byte_operand<const volatile _IntegerType>
112 : __byte_operand<_IntegerType> { };
113
114 template<typename _IntegerType>
115 using __byte_op_t = typename __byte_operand<_IntegerType>::__type;
116
117 template<typename _IntegerType>
118 constexpr __byte_op_t<_IntegerType>&
119 operator<<=(byte& __b, _IntegerType __shift) noexcept
120 { return __b = byte(static_cast<unsigned char>(__b) << __shift); }
121
122 template<typename _IntegerType>
123 constexpr __byte_op_t<_IntegerType>
124 operator<<(byte __b, _IntegerType __shift) noexcept
125 { return byte(static_cast<unsigned char>(__b) << __shift); }
126
127 template<typename _IntegerType>
128 constexpr __byte_op_t<_IntegerType>&
129 operator>>=(byte& __b, _IntegerType __shift) noexcept
130 { return __b = byte(static_cast<unsigned char>(__b) >> __shift); }
131
132 template<typename _IntegerType>
133 constexpr __byte_op_t<_IntegerType>
134 operator>>(byte __b, _IntegerType __shift) noexcept
135 { return byte(static_cast<unsigned char>(__b) >> __shift); }
136
137 constexpr byte&
138 operator|=(byte& __l, byte __r) noexcept
139 {
140 return __l =
141 byte(static_cast<unsigned char>(__l) | static_cast<unsigned char>(__r));
142 }
143
144 constexpr byte
145 operator|(byte __l, byte __r) noexcept
146 {
147 return
148 byte(static_cast<unsigned char>(__l) | static_cast<unsigned char>(__r));
149 }
150
151 constexpr byte&
152 operator&=(byte& __l, byte __r) noexcept
153 {
154 return __l =
155 byte(static_cast<unsigned char>(__l) & static_cast<unsigned char>(__r));
156 }
157
158 constexpr byte
159 operator&(byte __l, byte __r) noexcept
160 {
161 return
162 byte(static_cast<unsigned char>(__l) & static_cast<unsigned char>(__r));
163 }
164
165 constexpr byte&
166 operator^=(byte& __l, byte __r) noexcept
167 {
168 return __l =
169 byte(static_cast<unsigned char>(__l) ^ static_cast<unsigned char>(__r));
170 }
171
172 constexpr byte
173 operator^(byte __l, byte __r) noexcept
174 {
175 return
176 byte(static_cast<unsigned char>(__l) ^ static_cast<unsigned char>(__r));
177 }
178
179 constexpr byte
180 operator~(byte __b) noexcept
181 { return byte(~static_cast<unsigned char>(__b)); }
182
183 template<typename _IntegerType>
184 constexpr _IntegerType
185 to_integer(__byte_op_t<_IntegerType> __b) noexcept
186 { return _IntegerType(__b); }
187
188} // namespace std
189#endif
190
191#endif // _GLIBCXX_CSTDDEF
192