1// -*- C++ -*- forwarding header.
2
3// Copyright (C) 1997-2018 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