mirror of
https://github.com/topjohnwu/libcxx.git
synced 2024-11-26 21:20:30 +00:00
147 lines
4.1 KiB
C++
147 lines
4.1 KiB
C++
// -*- 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 <version>
|
|
|
|
#include <stddef.h>
|
|
|
|
#ifndef _LIBCPP_STDDEF_H
|
|
# error <cstddef> tried including <stddef.h> but didn't find libc++'s <stddef.h> header. \
|
|
This usually means that your header search paths are not configured properly. \
|
|
The header search paths should contain the C++ Standard Library headers before \
|
|
any C Standard Library, and you are probably using compiler flags that make that \
|
|
not be the case.
|
|
#endif
|
|
|
|
#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 {};
|
|
|
|
_LIBCPP_HIDE_FROM_ABI 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)
|
|
));
|
|
}
|
|
|
|
_LIBCPP_HIDE_FROM_ABI constexpr byte& operator|=(byte& __lhs, byte __rhs) noexcept
|
|
{ return __lhs = __lhs | __rhs; }
|
|
|
|
_LIBCPP_HIDE_FROM_ABI 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)
|
|
));
|
|
}
|
|
|
|
_LIBCPP_HIDE_FROM_ABI constexpr byte& operator&=(byte& __lhs, byte __rhs) noexcept
|
|
{ return __lhs = __lhs & __rhs; }
|
|
|
|
_LIBCPP_HIDE_FROM_ABI 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)
|
|
));
|
|
}
|
|
|
|
_LIBCPP_HIDE_FROM_ABI constexpr byte& operator^=(byte& __lhs, byte __rhs) noexcept
|
|
{ return __lhs = __lhs ^ __rhs; }
|
|
|
|
_LIBCPP_HIDE_FROM_ABI 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>
|
|
_LIBCPP_HIDE_FROM_ABI constexpr _EnableByteOverload<_Integer> &
|
|
operator<<=(byte& __lhs, _Integer __shift) noexcept
|
|
{ return __lhs = __lhs << __shift; }
|
|
|
|
template <class _Integer>
|
|
_LIBCPP_HIDE_FROM_ABI 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>
|
|
_LIBCPP_HIDE_FROM_ABI constexpr _EnableByteOverload<_Integer> &
|
|
operator>>=(byte& __lhs, _Integer __shift) noexcept
|
|
{ return __lhs = __lhs >> __shift; }
|
|
|
|
template <class _Integer>
|
|
_LIBCPP_HIDE_FROM_ABI 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 _LIBCPP_HIDE_FROM_ABI constexpr _Integer
|
|
to_integer(byte __b) noexcept { return static_cast<_Integer>(__b); }
|
|
|
|
} // namespace std
|
|
|
|
#endif
|
|
|
|
#endif // _LIBCPP_CSTDDEF
|