2 //===--------------------------- cstddef ----------------------------------===//
4 // The LLVM Compiler Infrastructure
6 // This file is dual licensed under the MIT and the University of Illinois Open
7 // Source Licenses. See LICENSE.TXT for details.
9 //===----------------------------------------------------------------------===//
11 #ifndef _LIBCPP_CSTDDEF
12 #define _LIBCPP_CSTDDEF
19 offsetof(type,member-designator)
40 #define __need_ptrdiff_t
46 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
47 #pragma GCC system_header
50 _LIBCPP_BEGIN_NAMESPACE_STD
55 typedef long double max_align_t;
57 #ifdef _LIBCPP_HAS_NO_NULLPTR
59 struct _LIBCPP_TYPE_VIS nullptr_t
63 struct __nat {int __for_bool_;};
65 _LIBCPP_ALWAYS_INLINE _LIBCPP_CONSTEXPR nullptr_t() : __lx(0) {}
66 _LIBCPP_ALWAYS_INLINE _LIBCPP_CONSTEXPR nullptr_t(int __nat::*) : __lx(0) {}
68 _LIBCPP_ALWAYS_INLINE _LIBCPP_CONSTEXPR operator int __nat::*() const {return 0;}
71 _LIBCPP_ALWAYS_INLINE _LIBCPP_CONSTEXPR
72 operator _Tp* () const {return 0;}
74 template <class _Tp, class _Up>
76 operator _Tp _Up::* () const {return 0;}
78 friend _LIBCPP_ALWAYS_INLINE _LIBCPP_CONSTEXPR bool operator==(nullptr_t, nullptr_t) {return true;}
79 friend _LIBCPP_ALWAYS_INLINE _LIBCPP_CONSTEXPR bool operator!=(nullptr_t, nullptr_t) {return false;}
80 friend _LIBCPP_ALWAYS_INLINE _LIBCPP_CONSTEXPR bool operator<(nullptr_t, nullptr_t) {return false;}
81 friend _LIBCPP_ALWAYS_INLINE _LIBCPP_CONSTEXPR bool operator<=(nullptr_t, nullptr_t) {return true;}
82 friend _LIBCPP_ALWAYS_INLINE _LIBCPP_CONSTEXPR bool operator>(nullptr_t, nullptr_t) {return false;}
83 friend _LIBCPP_ALWAYS_INLINE _LIBCPP_CONSTEXPR bool operator>=(nullptr_t, nullptr_t) {return true;}
86 inline _LIBCPP_ALWAYS_INLINE _LIBCPP_CONSTEXPR nullptr_t __get_nullptr_t() {return nullptr_t(0);}
88 #define nullptr _VSTD::__get_nullptr_t()
90 #endif // _LIBCPP_HAS_NO_NULLPTR
92 _LIBCPP_END_NAMESPACE_STD
94 #ifndef _LIBCPP_HAS_NO_NULLPTR
98 typedef decltype(nullptr) nullptr_t;
101 #endif // _LIBCPP_HAS_NO_NULLPTR
103 #endif // _LIBCPP_CSTDDEF