cxx/include/cstddef
Howard Hinnant 08e17472e4 Windows support by Ruben Van Boxem.
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@142235 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-17 20:05:10 +00:00

103 lines
2.2 KiB
C++

// -*- C++ -*-
//===--------------------------- cstddef ----------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. 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>
#ifdef __GLIBC__
#define __need_NULL
#define __need_ptrdiff_t
#define __need_size_t
#endif // __GLIBC__
#include <stddef.h>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
#pragma GCC system_header
#endif
_LIBCPP_BEGIN_NAMESPACE_STD
using ::ptrdiff_t;
using ::size_t;
typedef long double max_align_t;
#ifdef _LIBCPP_HAS_NO_NULLPTR
struct _LIBCPP_VISIBLE 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 _Tp>
_LIBCPP_ALWAYS_INLINE
operator _Tp* () const {return 0;}
template <class _Tp, class _Up>
_LIBCPP_ALWAYS_INLINE
operator _Tp _Up::* () 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 _VSTD::__get_nullptr_t()
#endif // _LIBCPP_HAS_NO_NULLPTR
_LIBCPP_END_NAMESPACE_STD
#ifndef _LIBCPP_HAS_NO_NULLPTR
namespace std
{
typedef decltype(nullptr) nullptr_t;
}
#endif // _LIBCPP_HAS_NO_NULLPTR
#endif // _LIBCPP_CSTDDEF