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57b08b0944
to reflect the new license. These used slightly different spellings that defeated my regular expressions. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351648
114 lines
2.5 KiB
C++
114 lines
2.5 KiB
C++
// -*- C++ -*-
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//===--------------------------- cstddef ----------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP_CSTDDEF
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#define _LIBCPP_CSTDDEF
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/*
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cstddef synopsis
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Macros:
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offsetof(type,member-designator)
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NULL
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namespace std
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{
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Types:
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ptrdiff_t
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size_t
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max_align_t
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nullptr_t
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byte // C++17
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} // std
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*/
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#include <__config>
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#include <version>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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#pragma GCC system_header
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#endif
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// Don't include our own <stddef.h>; we don't want to declare ::nullptr_t.
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#include_next <stddef.h>
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#include <__nullptr>
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_LIBCPP_BEGIN_NAMESPACE_STD
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using ::ptrdiff_t;
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using ::size_t;
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#if defined(__CLANG_MAX_ALIGN_T_DEFINED) || defined(_GCC_MAX_ALIGN_T) || \
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defined(__DEFINED_max_align_t) || defined(__NetBSD__)
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// Re-use the compiler's <stddef.h> max_align_t where possible.
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using ::max_align_t;
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#else
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typedef long double max_align_t;
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#endif
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_LIBCPP_END_NAMESPACE_STD
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#if _LIBCPP_STD_VER > 14
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namespace std // purposefully not versioned
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{
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enum class byte : unsigned char {};
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constexpr byte operator| (byte __lhs, byte __rhs) noexcept
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{
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return static_cast<byte>(
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static_cast<unsigned char>(
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static_cast<unsigned int>(__lhs) | static_cast<unsigned int>(__rhs)
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));
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}
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constexpr byte& operator|=(byte& __lhs, byte __rhs) noexcept
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{ return __lhs = __lhs | __rhs; }
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constexpr byte operator& (byte __lhs, byte __rhs) noexcept
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{
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return static_cast<byte>(
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static_cast<unsigned char>(
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static_cast<unsigned int>(__lhs) & static_cast<unsigned int>(__rhs)
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));
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}
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constexpr byte& operator&=(byte& __lhs, byte __rhs) noexcept
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{ return __lhs = __lhs & __rhs; }
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constexpr byte operator^ (byte __lhs, byte __rhs) noexcept
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{
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return static_cast<byte>(
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static_cast<unsigned char>(
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static_cast<unsigned int>(__lhs) ^ static_cast<unsigned int>(__rhs)
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));
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}
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constexpr byte& operator^=(byte& __lhs, byte __rhs) noexcept
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{ return __lhs = __lhs ^ __rhs; }
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constexpr byte operator~ (byte __b) noexcept
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{
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return static_cast<byte>(
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static_cast<unsigned char>(
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~static_cast<unsigned int>(__b)
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));
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}
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}
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#include <type_traits> // rest of byte
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#endif
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#endif // _LIBCPP_CSTDDEF
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