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1 | 13 | up20180614 | // -*- C++ -*- |
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2 | //===--------------------------- cstddef ----------------------------------===// |
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3 | // |
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4 | // The LLVM Compiler Infrastructure |
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5 | // |
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6 | // This file is dual licensed under the MIT and the University of Illinois Open |
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7 | // Source Licenses. See LICENSE.TXT for details. |
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8 | // |
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9 | //===----------------------------------------------------------------------===// |
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10 | |||
11 | #ifndef _LIBCPP_CSTDDEF |
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12 | #define _LIBCPP_CSTDDEF |
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13 | |||
14 | /* |
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15 | cstddef synopsis |
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16 | |||
17 | Macros: |
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18 | |||
19 | offsetof(type,member-designator) |
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20 | NULL |
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21 | |||
22 | namespace std |
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23 | { |
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24 | |||
25 | Types: |
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26 | |||
27 | ptrdiff_t |
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28 | size_t |
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29 | max_align_t |
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30 | nullptr_t |
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31 | |||
32 | } // std |
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33 | |||
34 | */ |
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35 | |||
36 | #include <__config> |
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37 | |||
38 | #include <stddef.h> |
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39 | |||
40 | #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
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41 | #pragma GCC system_header |
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42 | #endif |
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43 | |||
44 | _LIBCPP_BEGIN_NAMESPACE_STD |
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45 | |||
46 | using ::ptrdiff_t; |
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47 | using ::size_t; |
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48 | |||
49 | #if defined(__CLANG_MAX_ALIGN_T_DEFINED) || defined(_GCC_MAX_ALIGN_T) |
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50 | // Re-use the compiler's <stddef.h> max_align_t where possible. |
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51 | using ::max_align_t; |
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52 | #else |
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53 | typedef long double max_align_t; |
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54 | #endif |
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55 | |||
56 | #ifdef _LIBCPP_HAS_NO_NULLPTR |
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57 | |||
58 | struct _LIBCPP_TYPE_VIS_ONLY nullptr_t |
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59 | { |
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60 | void* __lx; |
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61 | |||
62 | struct __nat {int __for_bool_;}; |
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63 | |||
64 | _LIBCPP_ALWAYS_INLINE _LIBCPP_CONSTEXPR nullptr_t() : __lx(0) {} |
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65 | _LIBCPP_ALWAYS_INLINE _LIBCPP_CONSTEXPR nullptr_t(int __nat::*) : __lx(0) {} |
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66 | |||
67 | _LIBCPP_ALWAYS_INLINE _LIBCPP_CONSTEXPR operator int __nat::*() const {return 0;} |
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68 | |||
69 | template <class _Tp> |
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70 | _LIBCPP_ALWAYS_INLINE _LIBCPP_CONSTEXPR |
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71 | operator _Tp* () const {return 0;} |
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72 | |||
73 | template <class _Tp, class _Up> |
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74 | _LIBCPP_ALWAYS_INLINE |
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75 | operator _Tp _Up::* () const {return 0;} |
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76 | |||
77 | friend _LIBCPP_ALWAYS_INLINE _LIBCPP_CONSTEXPR bool operator==(nullptr_t, nullptr_t) {return true;} |
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78 | friend _LIBCPP_ALWAYS_INLINE _LIBCPP_CONSTEXPR bool operator!=(nullptr_t, nullptr_t) {return false;} |
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79 | friend _LIBCPP_ALWAYS_INLINE _LIBCPP_CONSTEXPR bool operator<(nullptr_t, nullptr_t) {return false;} |
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80 | friend _LIBCPP_ALWAYS_INLINE _LIBCPP_CONSTEXPR bool operator<=(nullptr_t, nullptr_t) {return true;} |
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81 | friend _LIBCPP_ALWAYS_INLINE _LIBCPP_CONSTEXPR bool operator>(nullptr_t, nullptr_t) {return false;} |
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82 | friend _LIBCPP_ALWAYS_INLINE _LIBCPP_CONSTEXPR bool operator>=(nullptr_t, nullptr_t) {return true;} |
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83 | }; |
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84 | |||
85 | inline _LIBCPP_ALWAYS_INLINE _LIBCPP_CONSTEXPR nullptr_t __get_nullptr_t() {return nullptr_t(0);} |
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86 | |||
87 | #define nullptr _VSTD::__get_nullptr_t() |
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88 | |||
89 | #endif // _LIBCPP_HAS_NO_NULLPTR |
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90 | |||
91 | _LIBCPP_END_NAMESPACE_STD |
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92 | |||
93 | #ifndef _LIBCPP_HAS_NO_NULLPTR |
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94 | |||
95 | namespace std |
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96 | { |
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97 | typedef decltype(nullptr) nullptr_t; |
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98 | } |
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99 | |||
100 | #endif // _LIBCPP_HAS_NO_NULLPTR |
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101 | |||
102 | #endif // _LIBCPP_CSTDDEF |