1 //===---------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===---------------------------------------------------------------------===//
8
9 #ifndef _LIBCPP___CSTDDEF_BYTE_H
10 #define _LIBCPP___CSTDDEF_BYTE_H
11
12 #include <__config>
13 #include <__fwd/byte.h>
14 #include <__type_traits/enable_if.h>
15 #include <__type_traits/is_integral.h>
16
17 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
18 # pragma GCC system_header
19 #endif
20
21 #if _LIBCPP_STD_VER >= 17
22 namespace std { // purposefully not versioned
23
24 enum class byte : unsigned char {};
25
26 _LIBCPP_HIDE_FROM_ABI inline constexpr byte operator|(byte __lhs, byte __rhs) noexcept {
27 return static_cast<byte>(
28 static_cast<unsigned char>(static_cast<unsigned int>(__lhs) | static_cast<unsigned int>(__rhs)));
29 }
30
31 _LIBCPP_HIDE_FROM_ABI inline constexpr byte& operator|=(byte& __lhs, byte __rhs) noexcept {
32 return __lhs = __lhs | __rhs;
33 }
34
35 _LIBCPP_HIDE_FROM_ABI inline constexpr byte operator&(byte __lhs, byte __rhs) noexcept {
36 return static_cast<byte>(
37 static_cast<unsigned char>(static_cast<unsigned int>(__lhs) & static_cast<unsigned int>(__rhs)));
38 }
39
40 _LIBCPP_HIDE_FROM_ABI inline constexpr byte& operator&=(byte& __lhs, byte __rhs) noexcept {
41 return __lhs = __lhs & __rhs;
42 }
43
44 _LIBCPP_HIDE_FROM_ABI inline constexpr byte operator^(byte __lhs, byte __rhs) noexcept {
45 return static_cast<byte>(
46 static_cast<unsigned char>(static_cast<unsigned int>(__lhs) ^ static_cast<unsigned int>(__rhs)));
47 }
48
49 _LIBCPP_HIDE_FROM_ABI inline constexpr byte& operator^=(byte& __lhs, byte __rhs) noexcept {
50 return __lhs = __lhs ^ __rhs;
51 }
52
53 _LIBCPP_HIDE_FROM_ABI inline constexpr byte operator~(byte __b) noexcept {
54 return static_cast<byte>(static_cast<unsigned char>(~static_cast<unsigned int>(__b)));
55 }
56
57 template <class _Integer, __enable_if_t<is_integral<_Integer>::value, int> = 0>
58 _LIBCPP_HIDE_FROM_ABI constexpr byte& operator<<=(byte& __lhs, _Integer __shift) noexcept {
59 return __lhs = __lhs << __shift;
60 }
61
62 template <class _Integer, __enable_if_t<is_integral<_Integer>::value, int> = 0>
63 _LIBCPP_HIDE_FROM_ABI constexpr byte operator<<(byte __lhs, _Integer __shift) noexcept {
64 return static_cast<byte>(static_cast<unsigned char>(static_cast<unsigned int>(__lhs) << __shift));
65 }
66
67 template <class _Integer, __enable_if_t<is_integral<_Integer>::value, int> = 0>
68 _LIBCPP_HIDE_FROM_ABI constexpr byte& operator>>=(byte& __lhs, _Integer __shift) noexcept {
69 return __lhs = __lhs >> __shift;
70 }
71
72 template <class _Integer, __enable_if_t<is_integral<_Integer>::value, int> = 0>
73 _LIBCPP_HIDE_FROM_ABI constexpr byte operator>>(byte __lhs, _Integer __shift) noexcept {
74 return static_cast<byte>(static_cast<unsigned char>(static_cast<unsigned int>(__lhs) >> __shift));
75 }
76
77 template <class _Integer, __enable_if_t<is_integral<_Integer>::value, int> = 0>
to_integer(byte __b)78 [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr _Integer to_integer(byte __b) noexcept {
79 return static_cast<_Integer>(__b);
80 }
81
82 } // namespace std
83 #endif // _LIBCPP_STD_VER >= 17
84
85 #endif // _LIBCPP___CSTDDEF_BYTE_H
86