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libcxx initial import

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git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@103490 91177308-0d34-0410-b5e6-96231b3b80d8
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Howard Hinnant
2010-05-11 19:42:16 +00:00
commit bc8d3f97eb
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include/cstddef Normal file
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// -*- C++ -*-
//===--------------------------- cstddef ----------------------------------===//
//
// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCPP_CSTDDEF
#define _LIBCPP_CSTDDEF
/*
cstddef synopsis
Macros:
offsetof(type,member-designator)
NULL
namespace std
{
Types:
ptrdiff_t
size_t
max_align_t
nullptr_t
} // std
*/
#include <__config>
#include <stddef.h>
#pragma GCC system_header
_LIBCPP_BEGIN_NAMESPACE_STD
using ::ptrdiff_t;
using ::size_t;
typedef long double max_align_t;
#ifdef _LIBCPP_HAS_NO_NULLPTR
struct nullptr_t
{
void* _;
struct __nat {int __for_bool_;};
_LIBCPP_ALWAYS_INLINE nullptr_t(int __nat::*) {}
_LIBCPP_ALWAYS_INLINE operator int __nat::*() const {return 0;}
template <class T>
_LIBCPP_ALWAYS_INLINE
operator T* () const {return 0;}
template <class T, class U>
_LIBCPP_ALWAYS_INLINE
operator T U::* () const {return 0;}
friend _LIBCPP_ALWAYS_INLINE bool operator==(nullptr_t, nullptr_t) {return true;}
friend _LIBCPP_ALWAYS_INLINE bool operator!=(nullptr_t, nullptr_t) {return false;}
friend _LIBCPP_ALWAYS_INLINE bool operator<(nullptr_t, nullptr_t) {return false;}
friend _LIBCPP_ALWAYS_INLINE bool operator<=(nullptr_t, nullptr_t) {return true;}
friend _LIBCPP_ALWAYS_INLINE bool operator>(nullptr_t, nullptr_t) {return false;}
friend _LIBCPP_ALWAYS_INLINE bool operator>=(nullptr_t, nullptr_t) {return true;}
};
inline _LIBCPP_ALWAYS_INLINE nullptr_t __get_nullptr_t() {return nullptr_t(0);}
#define nullptr _STD::__get_nullptr_t()
#else
typedef decltype(nullptr) nullptr_t;
#endif
_LIBCPP_END_NAMESPACE_STD
#endif // _LIBCPP_CSTDDEF