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| 1 | +// -*- C++ -*- |
| 2 | +//===----------------------------------------------------------------------===// |
| 3 | +// |
| 4 | +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 5 | +// See https://llvm.org/LICENSE.txt for license information. |
| 6 | +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 7 | +// |
| 8 | +//===----------------------------------------------------------------------===// |
| 9 | + |
| 10 | +// For information see https://libcxx.llvm.org/DesignDocs/TimeZone.html |
| 11 | + |
| 12 | +#ifndef _LIBCPP___CHRONO_LEAP_SECOND_H |
| 13 | +#define _LIBCPP___CHRONO_LEAP_SECOND_H |
| 14 | + |
| 15 | +#include <version> |
| 16 | +// Enable the contents of the header only when libc++ was built with experimental features enabled. |
| 17 | +#if !defined(_LIBCPP_HAS_NO_INCOMPLETE_TZDB) |
| 18 | + |
| 19 | +# include <__chrono/duration.h> |
| 20 | +# include <__chrono/system_clock.h> |
| 21 | +# include <__chrono/time_point.h> |
| 22 | +# include <__compare/ordering.h> |
| 23 | +# include <__compare/three_way_comparable.h> |
| 24 | +# include <__config> |
| 25 | + |
| 26 | +# if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| 27 | +# pragma GCC system_header |
| 28 | +# endif |
| 29 | + |
| 30 | +_LIBCPP_BEGIN_NAMESPACE_STD |
| 31 | + |
| 32 | +# if _LIBCPP_STD_VER >= 20 |
| 33 | + |
| 34 | +namespace chrono { |
| 35 | + |
| 36 | +class leap_second { |
| 37 | +public: |
| 38 | + struct __constructor_tag; |
| 39 | + [[nodiscard]] |
| 40 | + _LIBCPP_HIDE_FROM_ABI explicit constexpr leap_second(__constructor_tag&&, sys_seconds __date, seconds __value) |
| 41 | + : __date_(__date), __value_(__value) {} |
| 42 | + |
| 43 | + _LIBCPP_HIDE_FROM_ABI leap_second(const leap_second&) = default; |
| 44 | + _LIBCPP_HIDE_FROM_ABI leap_second& operator=(const leap_second&) = default; |
| 45 | + |
| 46 | + _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr sys_seconds date() const noexcept { return __date_; } |
| 47 | + |
| 48 | + _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr seconds value() const noexcept { return __value_; } |
| 49 | + |
| 50 | +private: |
| 51 | + sys_seconds __date_; |
| 52 | + seconds __value_; |
| 53 | +}; |
| 54 | + |
| 55 | +_LIBCPP_HIDE_FROM_ABI inline constexpr bool operator==(const leap_second& __x, const leap_second& __y) { |
| 56 | + return __x.date() == __y.date(); |
| 57 | +} |
| 58 | + |
| 59 | +_LIBCPP_HIDE_FROM_ABI inline constexpr strong_ordering operator<=>(const leap_second& __x, const leap_second& __y) { |
| 60 | + return __x.date() <=> __y.date(); |
| 61 | +} |
| 62 | + |
| 63 | +template <class _Duration> |
| 64 | +_LIBCPP_HIDE_FROM_ABI constexpr bool operator==(const leap_second& __x, const sys_time<_Duration>& __y) { |
| 65 | + return __x.date() == __y; |
| 66 | +} |
| 67 | + |
| 68 | +template <class _Duration> |
| 69 | +_LIBCPP_HIDE_FROM_ABI constexpr bool operator<(const leap_second& __x, const sys_time<_Duration>& __y) { |
| 70 | + return __x.date() < __y; |
| 71 | +} |
| 72 | + |
| 73 | +template <class _Duration> |
| 74 | +_LIBCPP_HIDE_FROM_ABI constexpr bool operator<(const sys_time<_Duration>& __x, const leap_second& __y) { |
| 75 | + return __x < __y.date(); |
| 76 | +} |
| 77 | + |
| 78 | +template <class _Duration> |
| 79 | +_LIBCPP_HIDE_FROM_ABI constexpr bool operator>(const leap_second& __x, const sys_time<_Duration>& __y) { |
| 80 | + return __y < __x; |
| 81 | +} |
| 82 | + |
| 83 | +template <class _Duration> |
| 84 | +_LIBCPP_HIDE_FROM_ABI constexpr bool operator>(const sys_time<_Duration>& __x, const leap_second& __y) { |
| 85 | + return __y < __x; |
| 86 | +} |
| 87 | + |
| 88 | +template <class _Duration> |
| 89 | +_LIBCPP_HIDE_FROM_ABI constexpr bool operator<=(const leap_second& __x, const sys_time<_Duration>& __y) { |
| 90 | + return !(__y < __x); |
| 91 | +} |
| 92 | + |
| 93 | +template <class _Duration> |
| 94 | +_LIBCPP_HIDE_FROM_ABI constexpr bool operator<=(const sys_time<_Duration>& __x, const leap_second& __y) { |
| 95 | + return !(__y < __x); |
| 96 | +} |
| 97 | + |
| 98 | +template <class _Duration> |
| 99 | +_LIBCPP_HIDE_FROM_ABI constexpr bool operator>=(const leap_second& __x, const sys_time<_Duration>& __y) { |
| 100 | + return !(__x < __y); |
| 101 | +} |
| 102 | + |
| 103 | +template <class _Duration> |
| 104 | +_LIBCPP_HIDE_FROM_ABI constexpr bool operator>=(const sys_time<_Duration>& __x, const leap_second& __y) { |
| 105 | + return !(__x < __y); |
| 106 | +} |
| 107 | + |
| 108 | +# ifndef _LIBCPP_COMPILER_GCC |
| 109 | +// This requirement cause a compilation loop in GCC-13 and running out of memory. |
| 110 | +// TODO TZDB Test whether GCC-14 fixes this. |
| 111 | +template <class _Duration> |
| 112 | + requires three_way_comparable_with<sys_seconds, sys_time<_Duration>> |
| 113 | +_LIBCPP_HIDE_FROM_ABI constexpr auto operator<=>(const leap_second& __x, const sys_time<_Duration>& __y) { |
| 114 | + return __x.date() <=> __y; |
| 115 | +} |
| 116 | +# endif |
| 117 | + |
| 118 | +} // namespace chrono |
| 119 | + |
| 120 | +# endif //_LIBCPP_STD_VER >= 20 |
| 121 | + |
| 122 | +_LIBCPP_END_NAMESPACE_STD |
| 123 | + |
| 124 | +#endif // !defined(_LIBCPP_HAS_NO_INCOMPLETE_TZDB) |
| 125 | + |
| 126 | +#endif // _LIBCPP___CHRONO_LEAP_SECOND_H |
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