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// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// 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 <__assert> // all public C++ headers provide the assertion handler
#include <__config>
#include <__type_traits/enable_if.h>
#include <__type_traits/integral_constant.h>
#include <__type_traits/is_integral.h>
#include <stddef.h>
#include <version>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# pragma GCC system_header
#endif
_LIBCPP_BEGIN_NAMESPACE_STD
using ::nullptr_t;
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
_LIBCPP_END_NAMESPACE_STD
#if _LIBCPP_STD_VER > 14
namespace std // purposefully not versioned
{
enum class byte : unsigned char {};
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 _Tp>
using _EnableByteOverload = __enable_if_t<is_integral<_Tp>::value, byte>;
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); }
} // namespace std
#endif
#endif // _LIBCPP_CSTDDEF
|
