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115 lines
2.4 KiB
C++
115 lines
2.4 KiB
C++
// -*- C++ -*-
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//===--------------------------- cstddef ----------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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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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