cstddef
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// -*- 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;
using ::size_t;
#if !defined(_LIBCPP_CXX03_LANG)
using ::max_align_t;
#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_NO_HAS_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> >
constexpr _Integer
to_integer(byte __b) noexcept { return static_cast<_Integer>(__b); }
}
#endif
#endif // _LIBCPP_CSTDDEF