| // -*- C++ -*- |
| //===--------------------------- cstddef ----------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef _LIBCPP_CSTDDEF |
| #define _LIBCPP_CSTDDEF |
| |
| /* |
| cstddef synopsis |
| |
| Macros: |
| |
| offsetof(type,member-designator) |
| NULL |
| |
| namespace std |
| { |
| |
| Types: |
| |
| ptrdiff_t |
| size_t |
| max_align_t // C++11 |
| nullptr_t |
| byte // C++17 |
| |
| } // std |
| |
| */ |
| |
| #include <__config> |
| #include <version> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| #pragma GCC system_header |
| #endif |
| |
| // Don't include our own <stddef.h>; we don't want to declare ::nullptr_t. |
| #include_next <stddef.h> |
| #include <__nullptr> |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| using ::ptrdiff_t _LIBCPP_USING_IF_EXISTS; |
| using ::size_t _LIBCPP_USING_IF_EXISTS; |
| |
| #if !defined(_LIBCPP_CXX03_LANG) |
| using ::max_align_t _LIBCPP_USING_IF_EXISTS; |
| #endif |
| |
| template <class _Tp> struct __libcpp_is_integral { enum { value = 0 }; }; |
| template <> struct __libcpp_is_integral<bool> { enum { value = 1 }; }; |
| template <> struct __libcpp_is_integral<char> { enum { value = 1 }; }; |
| template <> struct __libcpp_is_integral<signed char> { enum { value = 1 }; }; |
| template <> struct __libcpp_is_integral<unsigned char> { enum { value = 1 }; }; |
| #ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS |
| template <> struct __libcpp_is_integral<wchar_t> { enum { value = 1 }; }; |
| #endif |
| #ifndef _LIBCPP_HAS_NO_CHAR8_T |
| template <> struct __libcpp_is_integral<char8_t> { enum { value = 1 }; }; |
| #endif |
| #ifndef _LIBCPP_HAS_NO_UNICODE_CHARS |
| template <> struct __libcpp_is_integral<char16_t> { enum { value = 1 }; }; |
| template <> struct __libcpp_is_integral<char32_t> { enum { value = 1 }; }; |
| #endif |
| template <> struct __libcpp_is_integral<short> { enum { value = 1 }; }; |
| template <> struct __libcpp_is_integral<unsigned short> { enum { value = 1 }; }; |
| template <> struct __libcpp_is_integral<int> { enum { value = 1 }; }; |
| template <> struct __libcpp_is_integral<unsigned int> { enum { value = 1 }; }; |
| template <> struct __libcpp_is_integral<long> { enum { value = 1 }; }; |
| template <> struct __libcpp_is_integral<unsigned long> { enum { value = 1 }; }; |
| template <> struct __libcpp_is_integral<long long> { enum { value = 1 }; }; |
| template <> struct __libcpp_is_integral<unsigned long long> { enum { value = 1 }; }; |
| #ifndef _LIBCPP_HAS_NO_INT128 |
| template <> struct __libcpp_is_integral<__int128_t> { enum { value = 1 }; }; |
| template <> struct __libcpp_is_integral<__uint128_t> { enum { value = 1 }; }; |
| #endif |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #if _LIBCPP_STD_VER > 14 |
| namespace std // purposefully not versioned |
| { |
| enum class byte : unsigned char {}; |
| |
| |
| template <bool> struct __enable_if_integral_imp {}; |
| template <> struct __enable_if_integral_imp<true> { using type = byte; }; |
| template <class _Tp> using _EnableByteOverload = typename __enable_if_integral_imp<__libcpp_is_integral<_Tp>::value>::type; |
| |
| constexpr byte operator| (byte __lhs, byte __rhs) noexcept |
| { |
| return static_cast<byte>( |
| static_cast<unsigned char>( |
| static_cast<unsigned int>(__lhs) | static_cast<unsigned int>(__rhs) |
| )); |
| } |
| |
| constexpr byte& operator|=(byte& __lhs, byte __rhs) noexcept |
| { return __lhs = __lhs | __rhs; } |
| |
| constexpr byte operator& (byte __lhs, byte __rhs) noexcept |
| { |
| return static_cast<byte>( |
| static_cast<unsigned char>( |
| static_cast<unsigned int>(__lhs) & static_cast<unsigned int>(__rhs) |
| )); |
| } |
| |
| constexpr byte& operator&=(byte& __lhs, byte __rhs) noexcept |
| { return __lhs = __lhs & __rhs; } |
| |
| constexpr byte operator^ (byte __lhs, byte __rhs) noexcept |
| { |
| return static_cast<byte>( |
| static_cast<unsigned char>( |
| static_cast<unsigned int>(__lhs) ^ static_cast<unsigned int>(__rhs) |
| )); |
| } |
| |
| constexpr byte& operator^=(byte& __lhs, byte __rhs) noexcept |
| { return __lhs = __lhs ^ __rhs; } |
| |
| constexpr byte operator~ (byte __b) noexcept |
| { |
| return static_cast<byte>( |
| static_cast<unsigned char>( |
| ~static_cast<unsigned int>(__b) |
| )); |
| } |
| template <class _Integer> |
| constexpr _EnableByteOverload<_Integer> & |
| operator<<=(byte& __lhs, _Integer __shift) noexcept |
| { return __lhs = __lhs << __shift; } |
| |
| template <class _Integer> |
| constexpr _EnableByteOverload<_Integer> |
| operator<< (byte __lhs, _Integer __shift) noexcept |
| { return static_cast<byte>(static_cast<unsigned char>(static_cast<unsigned int>(__lhs) << __shift)); } |
| |
| template <class _Integer> |
| constexpr _EnableByteOverload<_Integer> & |
| operator>>=(byte& __lhs, _Integer __shift) noexcept |
| { return __lhs = __lhs >> __shift; } |
| |
| template <class _Integer> |
| constexpr _EnableByteOverload<_Integer> |
| operator>> (byte __lhs, _Integer __shift) noexcept |
| { return static_cast<byte>(static_cast<unsigned char>(static_cast<unsigned int>(__lhs) >> __shift)); } |
| |
| template <class _Integer, class = _EnableByteOverload<_Integer> > |
| _LIBCPP_NODISCARD_EXT constexpr _Integer |
| to_integer(byte __b) noexcept { return static_cast<_Integer>(__b); } |
| } |
| |
| #endif |
| |
| #endif // _LIBCPP_CSTDDEF |