libstdc++
cstddef
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1 // -*- C++ -*- forwarding header.
2 
3 // Copyright (C) 1997-2021 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 extern "C++"
53 {
54 #if __cplusplus >= 201103L
55 namespace 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
63 namespace 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 (byte)(unsigned char)((unsigned)__b << __shift); }
127 
128  template<typename _IntegerType>
129  constexpr __byte_op_t<_IntegerType>
130  operator>>(byte __b, _IntegerType __shift) noexcept
131  { return (byte)(unsigned char)((unsigned)__b >> __shift); }
132 
133  constexpr byte
134  operator|(byte __l, byte __r) noexcept
135  { return (byte)(unsigned char)((unsigned)__l | (unsigned)__r); }
136 
137  constexpr byte
138  operator&(byte __l, byte __r) noexcept
139  { return (byte)(unsigned char)((unsigned)__l & (unsigned)__r); }
140 
141  constexpr byte
142  operator^(byte __l, byte __r) noexcept
143  { return (byte)(unsigned char)((unsigned)__l ^ (unsigned)__r); }
144 
145  constexpr byte
146  operator~(byte __b) noexcept
147  { return (byte)(unsigned char)~(unsigned)__b; }
148 
149  template<typename _IntegerType>
150  constexpr __byte_op_t<_IntegerType>&
151  operator<<=(byte& __b, _IntegerType __shift) noexcept
152  { return __b = __b << __shift; }
153 
154  template<typename _IntegerType>
155  constexpr __byte_op_t<_IntegerType>&
156  operator>>=(byte& __b, _IntegerType __shift) noexcept
157  { return __b = __b >> __shift; }
158 
159  constexpr byte&
160  operator|=(byte& __l, byte __r) noexcept
161  { return __l = __l | __r; }
162 
163  constexpr byte&
164  operator&=(byte& __l, byte __r) noexcept
165  { return __l = __l & __r; }
166 
167  constexpr byte&
168  operator^=(byte& __l, byte __r) noexcept
169  { return __l = __l ^ __r; }
170 
171  template<typename _IntegerType>
172  [[nodiscard]]
173  constexpr _IntegerType
174  to_integer(__byte_op_t<_IntegerType> __b) noexcept
175  { return _IntegerType(__b); }
176 
177 _GLIBCXX_END_NAMESPACE_VERSION
178 } // namespace std
179 #endif // C++17
180 } // extern "C++"
181 
182 #endif // _GLIBCXX_CSTDDEF
ISO C++ entities toplevel namespace is std.
std::basic_istream< _CharT, _Traits > & operator>>(std::basic_istream< _CharT, _Traits > &__is, bitset< _Nb > &__x)
Global I/O operators for bitsets.
Definition: bitset:1472
bitset< _Nb > operator^(const bitset< _Nb > &__x, const bitset< _Nb > &__y) noexcept
Global bitwise operations on bitsets.
Definition: bitset:1453
std::basic_ostream< _CharT, _Traits > & operator<<(std::basic_ostream< _CharT, _Traits > &__os, const bitset< _Nb > &__x)
Global I/O operators for bitsets.
Definition: bitset:1540
bitset< _Nb > operator|(const bitset< _Nb > &__x, const bitset< _Nb > &__y) noexcept
Global bitwise operations on bitsets.
Definition: bitset:1444
bitset< _Nb > operator&(const bitset< _Nb > &__x, const bitset< _Nb > &__y) noexcept
Global bitwise operations on bitsets.
Definition: bitset:1435
byte
std::byte
Definition: cstddef:69