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Diffstat (limited to 'contrib/llvm-project/libcxx/include/cstddef')
| -rw-r--r-- | contrib/llvm-project/libcxx/include/cstddef | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/contrib/llvm-project/libcxx/include/cstddef b/contrib/llvm-project/libcxx/include/cstddef new file mode 100644 index 000000000000..1b54e7b2e0dc --- /dev/null +++ b/contrib/llvm-project/libcxx/include/cstddef @@ -0,0 +1,161 @@ +// -*- 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 }; }; +template <> struct __libcpp_is_integral<wchar_t> { enum { value = 1 }; }; +#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 // _LIBCPP_HAS_NO_UNICODE_CHARS +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 |