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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-exception7//8//===----------------------------------------------------------------------===//9 10#ifndef _LIBCPP___CXX03_CHRONO11#define _LIBCPP___CXX03_CHRONO12 13// clang-format off14 15/*16 chrono synopsis17 18#include <__cxx03/compare> // C++2019 20namespace std21{22namespace chrono23{24 25template <class ToDuration, class Rep, class Period>26constexpr27ToDuration28duration_cast(const duration<Rep, Period>& fd);29 30template <class Rep> struct treat_as_floating_point : is_floating_point<Rep> {};31 32template <class Rep> inline constexpr bool treat_as_floating_point_v33 = treat_as_floating_point<Rep>::value; // C++1734 35template <class Rep>36struct duration_values37{38public:39 static constexpr Rep zero(); // noexcept in C++2040 static constexpr Rep max(); // noexcept in C++2041 static constexpr Rep min(); // noexcept in C++2042};43 44// duration45 46template <class Rep, class Period = ratio<1>>47class duration48{49 static_assert(!__is_duration<Rep>::value, "A duration representation can not be a duration");50 static_assert(__is_ratio<Period>::value, "Second template parameter of duration must be a std::ratio");51 static_assert(Period::num > 0, "duration period must be positive");52public:53 typedef Rep rep;54 typedef typename _Period::type period;55 56 constexpr duration() = default;57 template <class Rep2>58 constexpr explicit duration(const Rep2& r,59 typename enable_if60 <61 is_convertible<const Rep2&, rep>::value &&62 (treat_as_floating_point<rep>::value ||63 !treat_as_floating_point<rep>::value && !treat_as_floating_point<Rep2>::value)64 >::type* = 0);65 66 // conversions67 template <class Rep2, class Period2>68 constexpr duration(const duration<Rep2, Period2>& d,69 typename enable_if70 <71 treat_as_floating_point<rep>::value ||72 ratio_divide<Period2, period>::type::den == 173 >::type* = 0);74 75 // observer76 77 constexpr rep count() const;78 79 // arithmetic80 81 constexpr common_type<duration>::type operator+() const;82 constexpr common_type<duration>::type operator-() const;83 constexpr duration& operator++(); // constexpr in C++1784 constexpr duration operator++(int); // constexpr in C++1785 constexpr duration& operator--(); // constexpr in C++1786 constexpr duration operator--(int); // constexpr in C++1787 88 constexpr duration& operator+=(const duration& d); // constexpr in C++1789 constexpr duration& operator-=(const duration& d); // constexpr in C++1790 91 duration& operator*=(const rep& rhs); // constexpr in C++1792 duration& operator/=(const rep& rhs); // constexpr in C++1793 duration& operator%=(const rep& rhs); // constexpr in C++1794 duration& operator%=(const duration& rhs); // constexpr in C++1795 96 // special values97 98 static constexpr duration zero(); // noexcept in C++2099 static constexpr duration min(); // noexcept in C++20100 static constexpr duration max(); // noexcept in C++20101};102 103typedef duration<long long, nano> nanoseconds;104typedef duration<long long, micro> microseconds;105typedef duration<long long, milli> milliseconds;106typedef duration<long long > seconds;107typedef duration< long, ratio< 60> > minutes;108typedef duration< long, ratio<3600> > hours;109 110template <class Clock, class Duration = typename Clock::duration>111class time_point112{113public:114 typedef Clock clock;115 typedef Duration duration;116 typedef typename duration::rep rep;117 typedef typename duration::period period;118private:119 duration d_; // exposition only120 121public:122 time_point(); // has value "epoch" // constexpr in C++14123 explicit time_point(const duration& d); // same as time_point() + d // constexpr in C++14124 125 // conversions126 template <class Duration2>127 time_point(const time_point<clock, Duration2>& t); // constexpr in C++14128 129 // observer130 131 duration time_since_epoch() const; // constexpr in C++14132 133 // arithmetic134 135 time_point& operator+=(const duration& d); // constexpr in C++17136 time_point& operator-=(const duration& d); // constexpr in C++17137 138 // special values139 140 static constexpr time_point min(); // noexcept in C++20141 static constexpr time_point max(); // noexcept in C++20142};143 144} // chrono145 146// common_type traits147template <class Rep1, class Period1, class Rep2, class Period2>148 struct common_type<chrono::duration<Rep1, Period1>, chrono::duration<Rep2, Period2>>;149 150template <class Clock, class Duration1, class Duration2>151 struct common_type<chrono::time_point<Clock, Duration1>, chrono::time_point<Clock, Duration2>>;152 153namespace chrono {154 155// duration arithmetic156template <class Rep1, class Period1, class Rep2, class Period2>157 constexpr158 typename common_type<duration<Rep1, Period1>, duration<Rep2, Period2>>::type159 operator+(const duration<Rep1, Period1>& lhs, const duration<Rep2, Period2>& rhs);160template <class Rep1, class Period1, class Rep2, class Period2>161 constexpr162 typename common_type<duration<Rep1, Period1>, duration<Rep2, Period2>>::type163 operator-(const duration<Rep1, Period1>& lhs, const duration<Rep2, Period2>& rhs);164template <class Rep1, class Period, class Rep2>165 constexpr166 duration<typename common_type<Rep1, Rep2>::type, Period>167 operator*(const duration<Rep1, Period>& d, const Rep2& s);168template <class Rep1, class Period, class Rep2>169 constexpr170 duration<typename common_type<Rep1, Rep2>::type, Period>171 operator*(const Rep1& s, const duration<Rep2, Period>& d);172template <class Rep1, class Period, class Rep2>173 constexpr174 duration<typename common_type<Rep1, Rep2>::type, Period>175 operator/(const duration<Rep1, Period>& d, const Rep2& s);176template <class Rep1, class Period1, class Rep2, class Period2>177 constexpr178 typename common_type<Rep1, Rep2>::type179 operator/(const duration<Rep1, Period1>& lhs, const duration<Rep2, Period2>& rhs);180 181// duration comparisons182template <class Rep1, class Period1, class Rep2, class Period2>183 constexpr184 bool operator==(const duration<Rep1, Period1>& lhs, const duration<Rep2, Period2>& rhs);185template <class Rep1, class Period1, class Rep2, class Period2>186 constexpr187 bool operator!=(const duration<Rep1, Period1>& lhs, const duration<Rep2, Period2>& rhs); // removed in C++20188template <class Rep1, class Period1, class Rep2, class Period2>189 constexpr190 bool operator< (const duration<Rep1, Period1>& lhs, const duration<Rep2, Period2>& rhs);191template <class Rep1, class Period1, class Rep2, class Period2>192 constexpr193 bool operator<=(const duration<Rep1, Period1>& lhs, const duration<Rep2, Period2>& rhs);194template <class Rep1, class Period1, class Rep2, class Period2>195 constexpr196 bool operator> (const duration<Rep1, Period1>& lhs, const duration<Rep2, Period2>& rhs);197template <class Rep1, class Period1, class Rep2, class Period2>198 constexpr199 bool operator>=(const duration<Rep1, Period1>& lhs, const duration<Rep2, Period2>& rhs);200template<class Rep1, class Period1, class Rep2, class Period2>201 requires three_way_comparable<typename CT::rep>202 constexpr auto operator<=>(const duration<Rep1, Period1>& lhs,203 const duration<Rep2, Period2>& rhs); // since C++20204 205// duration_cast206template <class ToDuration, class Rep, class Period>207 ToDuration duration_cast(const duration<Rep, Period>& d);208 209template <class ToDuration, class Rep, class Period>210 constexpr ToDuration floor(const duration<Rep, Period>& d); // C++17211template <class ToDuration, class Rep, class Period>212 constexpr ToDuration ceil(const duration<Rep, Period>& d); // C++17213template <class ToDuration, class Rep, class Period>214 constexpr ToDuration round(const duration<Rep, Period>& d); // C++17215 216// duration I/O217template<class charT, class traits, class Rep, class Period> // C++20218 basic_ostream<charT, traits>&219 operator<<(basic_ostream<charT, traits>& os,220 const duration<Rep, Period>& d);221 222// time_point arithmetic (all constexpr in C++14)223template <class Clock, class Duration1, class Rep2, class Period2>224 time_point<Clock, typename common_type<Duration1, duration<Rep2, Period2>>::type>225 operator+(const time_point<Clock, Duration1>& lhs, const duration<Rep2, Period2>& rhs);226template <class Rep1, class Period1, class Clock, class Duration2>227 time_point<Clock, typename common_type<duration<Rep1, Period1>, Duration2>::type>228 operator+(const duration<Rep1, Period1>& lhs, const time_point<Clock, Duration2>& rhs);229template <class Clock, class Duration1, class Rep2, class Period2>230 time_point<Clock, typename common_type<Duration1, duration<Rep2, Period2>>::type>231 operator-(const time_point<Clock, Duration1>& lhs, const duration<Rep2, Period2>& rhs);232template <class Clock, class Duration1, class Duration2>233 typename common_type<Duration1, Duration2>::type234 operator-(const time_point<Clock, Duration1>& lhs, const time_point<Clock, Duration2>& rhs);235 236// time_point comparisons (all constexpr in C++14)237template <class Clock, class Duration1, class Duration2>238 bool operator==(const time_point<Clock, Duration1>& lhs, const time_point<Clock, Duration2>& rhs);239template <class Clock, class Duration1, class Duration2>240 bool operator!=(const time_point<Clock, Duration1>& lhs, const time_point<Clock, Duration2>& rhs); // removed in C++20241template <class Clock, class Duration1, class Duration2>242 bool operator< (const time_point<Clock, Duration1>& lhs, const time_point<Clock, Duration2>& rhs);243template <class Clock, class Duration1, class Duration2>244 bool operator<=(const time_point<Clock, Duration1>& lhs, const time_point<Clock, Duration2>& rhs);245template <class Clock, class Duration1, class Duration2>246 bool operator> (const time_point<Clock, Duration1>& lhs, const time_point<Clock, Duration2>& rhs);247template <class Clock, class Duration1, class Duration2>248 bool operator>=(const time_point<Clock, Duration1>& lhs, const time_point<Clock, Duration2>& rhs);249template<class Clock, class Duration1,250 three_way_comparable_with<Duration1> Duration2>251 constexpr auto operator<=>(const time_point<Clock, Duration1>& lhs,252 const time_point<Clock, Duration2>& rhs); // since C++20253 254// time_point_cast (constexpr in C++14)255 256template <class ToDuration, class Clock, class Duration>257 time_point<Clock, ToDuration> time_point_cast(const time_point<Clock, Duration>& t);258 259template <class ToDuration, class Clock, class Duration>260 constexpr time_point<Clock, ToDuration>261 floor(const time_point<Clock, Duration>& tp); // C++17262 263template <class ToDuration, class Clock, class Duration>264 constexpr time_point<Clock, ToDuration>265 ceil(const time_point<Clock, Duration>& tp); // C++17266 267template <class ToDuration, class Clock, class Duration>268 constexpr time_point<Clock, ToDuration>269 round(const time_point<Clock, Duration>& tp); // C++17270 271template <class Rep, class Period>272 constexpr duration<Rep, Period> abs(duration<Rep, Period> d); // C++17273 274// Clocks275 276class system_clock277{278public:279 typedef microseconds duration;280 typedef duration::rep rep;281 typedef duration::period period;282 typedef chrono::time_point<system_clock> time_point;283 static const bool is_steady = false; // constexpr in C++14284 285 static time_point now() noexcept;286 static time_t to_time_t (const time_point& __t) noexcept;287 static time_point from_time_t(time_t __t) noexcept;288};289 290template <class Duration>291 using sys_time = time_point<system_clock, Duration>; // C++20292using sys_seconds = sys_time<seconds>; // C++20293using sys_days = sys_time<days>; // C++20294 295template<class charT, class traits, class Duration> // C++20296 basic_ostream<charT, traits>&297 operator<<(basic_ostream<charT, traits>& os, const sys_time<Duration>& tp);298 299template<class charT, class traits> // C++20300 basic_ostream<charT, traits>&301 operator<<(basic_ostream<charT, traits>& os, const sys_days& dp);302 303class file_clock // C++20304{305public:306 typedef see-below rep;307 typedef nano period;308 typedef chrono::duration<rep, period> duration;309 typedef chrono::time_point<file_clock> time_point;310 static constexpr bool is_steady = false;311 312 static time_point now() noexcept;313 314 template<class Duration>315 static sys_time<see-below> to_sys(const file_time<Duration>&);316 317 template<class Duration>318 static file_time<see-below> from_sys(const sys_time<Duration>&);319};320 321template<class Duration>322 using file_time = time_point<file_clock, Duration>; // C++20323 324template<class charT, class traits, class Duration> // C++20325 basic_ostream<charT, traits>&326 operator<<(basic_ostream<charT, traits>& os, const file_time<Duration>& tp);327 328class steady_clock329{330public:331 typedef nanoseconds duration;332 typedef duration::rep rep;333 typedef duration::period period;334 typedef chrono::time_point<steady_clock, duration> time_point;335 static const bool is_steady = true; // constexpr in C++14336 337 static time_point now() noexcept;338};339 340typedef steady_clock high_resolution_clock;341 342// 25.7.8, local time // C++20343struct local_t {};344template<class Duration>345 using local_time = time_point<local_t, Duration>;346using local_seconds = local_time<seconds>;347using local_days = local_time<days>;348 349template<class charT, class traits, class Duration> // C++20350 basic_ostream<charT, traits>&351 operator<<(basic_ostream<charT, traits>& os, const local_time<Duration>& tp);352 353// 25.8.2, class last_spec // C++20354struct last_spec;355 356// 25.8.3, class day // C++20357 358class day;359constexpr bool operator==(const day& x, const day& y) noexcept;360constexpr strong_ordering operator<=>(const day& x, const day& y) noexcept;361constexpr day operator+(const day& x, const days& y) noexcept;362constexpr day operator+(const days& x, const day& y) noexcept;363constexpr day operator-(const day& x, const days& y) noexcept;364constexpr days operator-(const day& x, const day& y) noexcept;365template<class charT, class traits>366 basic_ostream<charT, traits>&367 operator<<(basic_ostream<charT, traits>& os, const day& d);368 369// 25.8.4, class month // C++20370class month;371constexpr bool operator==(const month& x, const month& y) noexcept;372constexpr strong_ordering operator<=>(const month& x, const month& y) noexcept;373 374constexpr month operator+(const month& x, const months& y) noexcept;375constexpr month operator+(const months& x, const month& y) noexcept;376constexpr month operator-(const month& x, const months& y) noexcept;377constexpr months operator-(const month& x, const month& y) noexcept;378template<class charT, class traits>379 basic_ostream<charT, traits>&380 operator<<(basic_ostream<charT, traits>& os, const month& m);381 382// 25.8.5, class year // C++20383class year;384constexpr bool operator==(const year& x, const year& y) noexcept;385constexpr strong_ordering operator<=>(const year& x, const year& y) noexcept;386 387constexpr year operator+(const year& x, const years& y) noexcept;388constexpr year operator+(const years& x, const year& y) noexcept;389constexpr year operator-(const year& x, const years& y) noexcept;390constexpr years operator-(const year& x, const year& y) noexcept;391template<class charT, class traits>392 basic_ostream<charT, traits>&393 operator<<(basic_ostream<charT, traits>& os, const year& y);394 395// 25.8.6, class weekday // C++20396class weekday;397 398constexpr bool operator==(const weekday& x, const weekday& y) noexcept;399constexpr weekday operator+(const weekday& x, const days& y) noexcept;400constexpr weekday operator+(const days& x, const weekday& y) noexcept;401constexpr weekday operator-(const weekday& x, const days& y) noexcept;402constexpr days operator-(const weekday& x, const weekday& y) noexcept;403template<class charT, class traits>404 basic_ostream<charT, traits>&405 operator<<(basic_ostream<charT, traits>& os, const weekday& wd);406 407// 25.8.7, class weekday_indexed // C++20408 409class weekday_indexed;410constexpr bool operator==(const weekday_indexed& x, const weekday_indexed& y) noexcept;411 412template<class charT, class traits>413 basic_ostream<charT, traits>&414 operator<<(basic_ostream<charT, traits>& os, const weekday_indexed& wdi);415 416// 25.8.8, class weekday_last // C++20417class weekday_last;418 419constexpr bool operator==(const weekday_last& x, const weekday_last& y) noexcept;420 421template<class charT, class traits>422 basic_ostream<charT, traits>&423 operator<<(basic_ostream<charT, traits>& os, const weekday_last& wdl);424 425// 25.8.9, class month_day // C++20426class month_day;427 428constexpr bool operator==(const month_day& x, const month_day& y) noexcept;429constexpr strong_ordering operator<=>(const month_day& x, const month_day& y) noexcept;430 431template<class charT, class traits>432 basic_ostream<charT, traits>&433 operator<<(basic_ostream<charT, traits>& os, const month_day& md);434 435// 25.8.10, class month_day_last // C++20436class month_day_last;437 438constexpr bool operator==(const month_day_last& x, const month_day_last& y) noexcept;439constexpr strong_ordering operator<=>(const month_day_last& x, const month_day_last& y) noexcept;440 441template<class charT, class traits>442 basic_ostream<charT, traits>&443 operator<<(basic_ostream<charT, traits>& os, const month_day_last& mdl);444 445// 25.8.11, class month_weekday // C++20446class month_weekday;447 448constexpr bool operator==(const month_weekday& x, const month_weekday& y) noexcept;449 450template<class charT, class traits>451 basic_ostream<charT, traits>&452 operator<<(basic_ostream<charT, traits>& os, const month_weekday& mwd);453 454// 25.8.12, class month_weekday_last // C++20455class month_weekday_last;456 457constexpr bool operator==(const month_weekday_last& x, const month_weekday_last& y) noexcept;458 459template<class charT, class traits>460 basic_ostream<charT, traits>&461 operator<<(basic_ostream<charT, traits>& os, const month_weekday_last& mwdl);462 463 464// 25.8.13, class year_month // C++20465class year_month;466 467constexpr bool operator==(const year_month& x, const year_month& y) noexcept;468constexpr strong_ordering operator<=>(const year_month& x, const year_month& y) noexcept;469 470constexpr year_month operator+(const year_month& ym, const months& dm) noexcept;471constexpr year_month operator+(const months& dm, const year_month& ym) noexcept;472constexpr year_month operator-(const year_month& ym, const months& dm) noexcept;473constexpr months operator-(const year_month& x, const year_month& y) noexcept;474constexpr year_month operator+(const year_month& ym, const years& dy) noexcept;475constexpr year_month operator+(const years& dy, const year_month& ym) noexcept;476constexpr year_month operator-(const year_month& ym, const years& dy) noexcept;477 478template<class charT, class traits>479 basic_ostream<charT, traits>&480 operator<<(basic_ostream<charT, traits>& os, const year_month& ym);481 482// 25.8.14, class year_month_day class // C++20483year_month_day;484 485constexpr bool operator==(const year_month_day& x, const year_month_day& y) noexcept;486constexpr strong_ordering operator<=>(const year_month_day& x, const year_month_day& y) noexcept;487 488constexpr year_month_day operator+(const year_month_day& ymd, const months& dm) noexcept;489constexpr year_month_day operator+(const months& dm, const year_month_day& ymd) noexcept;490constexpr year_month_day operator+(const year_month_day& ymd, const years& dy) noexcept;491constexpr year_month_day operator+(const years& dy, const year_month_day& ymd) noexcept;492constexpr year_month_day operator-(const year_month_day& ymd, const months& dm) noexcept;493constexpr year_month_day operator-(const year_month_day& ymd, const years& dy) noexcept;494 495template<class charT, class traits>496 basic_ostream<charT, traits>&497 operator<<(basic_ostream<charT, traits>& os, const year_month_day& ymd);498 499// 25.8.15, class year_month_day_last // C++20500class year_month_day_last;501 502constexpr bool operator==(const year_month_day_last& x, const year_month_day_last& y) noexcept;503constexpr strong_ordering operator<=>(const year_month_day_last_day& x, const year_month_day_last_day& y) noexcept;504 505constexpr year_month_day_last506 operator+(const year_month_day_last& ymdl, const months& dm) noexcept;507constexpr year_month_day_last508 operator+(const months& dm, const year_month_day_last& ymdl) noexcept;509constexpr year_month_day_last510 operator+(const year_month_day_last& ymdl, const years& dy) noexcept;511constexpr year_month_day_last512 operator+(const years& dy, const year_month_day_last& ymdl) noexcept;513constexpr year_month_day_last514 operator-(const year_month_day_last& ymdl, const months& dm) noexcept;515constexpr year_month_day_last516 operator-(const year_month_day_last& ymdl, const years& dy) noexcept;517 518template<class charT, class traits>519 basic_ostream<charT, traits>&520 operator<<(basic_ostream<charT, traits>& os, const year_month_day_last& ymdl);521 522// 25.8.16, class year_month_weekday // C++20523class year_month_weekday;524 525constexpr bool operator==(const year_month_weekday& x,526 const year_month_weekday& y) noexcept;527 528constexpr year_month_weekday529 operator+(const year_month_weekday& ymwd, const months& dm) noexcept;530constexpr year_month_weekday531 operator+(const months& dm, const year_month_weekday& ymwd) noexcept;532constexpr year_month_weekday533 operator+(const year_month_weekday& ymwd, const years& dy) noexcept;534constexpr year_month_weekday535 operator+(const years& dy, const year_month_weekday& ymwd) noexcept;536constexpr year_month_weekday537 operator-(const year_month_weekday& ymwd, const months& dm) noexcept;538constexpr year_month_weekday539 operator-(const year_month_weekday& ymwd, const years& dy) noexcept;540 541template<class charT, class traits>542 basic_ostream<charT, traits>&543 operator<<(basic_ostream<charT, traits>& os, const year_month_weekday& ymwd);544 545// 25.8.17, class year_month_weekday_last // C++20546class year_month_weekday_last;547 548constexpr bool operator==(const year_month_weekday_last& x,549 const year_month_weekday_last& y) noexcept;550constexpr year_month_weekday_last551 operator+(const year_month_weekday_last& ymwdl, const months& dm) noexcept;552constexpr year_month_weekday_last553 operator+(const months& dm, const year_month_weekday_last& ymwdl) noexcept;554constexpr year_month_weekday_last555 operator+(const year_month_weekday_last& ymwdl, const years& dy) noexcept;556constexpr year_month_weekday_last557 operator+(const years& dy, const year_month_weekday_last& ymwdl) noexcept;558constexpr year_month_weekday_last559 operator-(const year_month_weekday_last& ymwdl, const months& dm) noexcept;560constexpr year_month_weekday_last561 operator-(const year_month_weekday_last& ymwdl, const years& dy) noexcept;562 563template<class charT, class traits>564 basic_ostream<charT, traits>&565 operator<<(basic_ostream<charT, traits>& os, const year_month_weekday_last& ymwdl);566 567// 25.8.18, civil calendar conventional syntax operators // C++20568constexpr year_month569 operator/(const year& y, const month& m) noexcept;570constexpr year_month571 operator/(const year& y, int m) noexcept;572constexpr month_day573 operator/(const month& m, const day& d) noexcept;574constexpr month_day575 operator/(const month& m, int d) noexcept;576constexpr month_day577 operator/(int m, const day& d) noexcept;578constexpr month_day579 operator/(const day& d, const month& m) noexcept;580constexpr month_day581 operator/(const day& d, int m) noexcept;582constexpr month_day_last583 operator/(const month& m, last_spec) noexcept;584constexpr month_day_last585 operator/(int m, last_spec) noexcept;586constexpr month_day_last587 operator/(last_spec, const month& m) noexcept;588constexpr month_day_last589 operator/(last_spec, int m) noexcept;590constexpr month_weekday591 operator/(const month& m, const weekday_indexed& wdi) noexcept;592constexpr month_weekday593 operator/(int m, const weekday_indexed& wdi) noexcept;594constexpr month_weekday595 operator/(const weekday_indexed& wdi, const month& m) noexcept;596constexpr month_weekday597 operator/(const weekday_indexed& wdi, int m) noexcept;598constexpr month_weekday_last599 operator/(const month& m, const weekday_last& wdl) noexcept;600constexpr month_weekday_last601 operator/(int m, const weekday_last& wdl) noexcept;602constexpr month_weekday_last603 operator/(const weekday_last& wdl, const month& m) noexcept;604constexpr month_weekday_last605 operator/(const weekday_last& wdl, int m) noexcept;606constexpr year_month_day607 operator/(const year_month& ym, const day& d) noexcept;608constexpr year_month_day609 operator/(const year_month& ym, int d) noexcept;610constexpr year_month_day611 operator/(const year& y, const month_day& md) noexcept;612constexpr year_month_day613 operator/(int y, const month_day& md) noexcept;614constexpr year_month_day615 operator/(const month_day& md, const year& y) noexcept;616constexpr year_month_day617 operator/(const month_day& md, int y) noexcept;618constexpr year_month_day_last619 operator/(const year_month& ym, last_spec) noexcept;620constexpr year_month_day_last621 operator/(const year& y, const month_day_last& mdl) noexcept;622constexpr year_month_day_last623 operator/(int y, const month_day_last& mdl) noexcept;624constexpr year_month_day_last625 operator/(const month_day_last& mdl, const year& y) noexcept;626constexpr year_month_day_last627 operator/(const month_day_last& mdl, int y) noexcept;628constexpr year_month_weekday629 operator/(const year_month& ym, const weekday_indexed& wdi) noexcept;630constexpr year_month_weekday631 operator/(const year& y, const month_weekday& mwd) noexcept;632constexpr year_month_weekday633 operator/(int y, const month_weekday& mwd) noexcept;634constexpr year_month_weekday635 operator/(const month_weekday& mwd, const year& y) noexcept;636constexpr year_month_weekday637 operator/(const month_weekday& mwd, int y) noexcept;638constexpr year_month_weekday_last639 operator/(const year_month& ym, const weekday_last& wdl) noexcept;640constexpr year_month_weekday_last641 operator/(const year& y, const month_weekday_last& mwdl) noexcept;642constexpr year_month_weekday_last643 operator/(int y, const month_weekday_last& mwdl) noexcept;644constexpr year_month_weekday_last645 operator/(const month_weekday_last& mwdl, const year& y) noexcept;646constexpr year_month_weekday_last647 operator/(const month_weekday_last& mwdl, int y) noexcept;648 649// 26.9, class template hh_mm_ss650template <class Duration>651class hh_mm_ss652{653 bool is_neg; // exposition only654 chrono::hours h; // exposition only655 chrono::minutes m; // exposition only656 chrono::seconds s; // exposition only657 precision ss; // exposition only658 659public:660 static unsigned constexpr fractional_width = see below;661 using precision = see below;662 663 constexpr hh_mm_ss() noexcept : hh_mm_ss{Duration::zero()} {}664 constexpr explicit hh_mm_ss(Duration d) noexcept;665 666 constexpr bool is_negative() const noexcept;667 constexpr chrono::hours hours() const noexcept;668 constexpr chrono::minutes minutes() const noexcept;669 constexpr chrono::seconds seconds() const noexcept;670 constexpr precision subseconds() const noexcept;671 672 constexpr explicit operator precision() const noexcept;673 constexpr precision to_duration() const noexcept;674};675 676template<class charT, class traits, class Duration>677 basic_ostream<charT, traits>&678 operator<<(basic_ostream<charT, traits>& os, const hh_mm_ss<Duration>& hms); // C++20679 680// 26.10, 12/24 hour functions681constexpr bool is_am(hours const& h) noexcept;682constexpr bool is_pm(hours const& h) noexcept;683constexpr hours make12(const hours& h) noexcept;684constexpr hours make24(const hours& h, bool is_pm) noexcept;685 686// [time.zone.db], time zone database687struct tzdb { // C++20688 string version;689 vector<time_zone> zones;690 vector<time_zone_link> links;691 vector<leap_second> leap_seconds;692 693 const time_zone* locate_zone(string_view tz_name) const;694 const time_zone* current_zone() const;695};696 697class tzdb_list { // C++20698public:699 tzdb_list(const tzdb_list&) = delete;700 tzdb_list& operator=(const tzdb_list&) = delete;701 702 // unspecified additional constructors703 704 class const_iterator;705 706 const tzdb& front() const noexcept;707 708 const_iterator erase_after(const_iterator p);709 710 const_iterator begin() const noexcept;711 const_iterator end() const noexcept;712 713 const_iterator cbegin() const noexcept;714 const_iterator cend() const noexcept;715};716 717// [time.zone.db.access], time zone database access718const tzdb& get_tzdb(); // C++20719tzdb_list& get_tzdb_list(); // C++20720const time_zone* locate_zone(string_view tz_name); // C++20721const time_zone* current_zone() // C++20722 723// [time.zone.db.remote], remote time zone database support724const tzdb& reload_tzdb(); // C++20725string remote_version(); // C++20726 727// [time.zone.exception], exception classes728class nonexistent_local_time; // C++20729class ambiguous_local_time; // C++20730 731// [time.zone.info], information classes732struct sys_info { // C++20733 sys_seconds begin;734 sys_seconds end;735 seconds offset;736 minutes save;737 string abbrev;738};739 740template<class charT, class traits> // C++20741 basic_ostream<charT, traits>&742 operator<<(basic_ostream<charT, traits>& os, const sys_info& si);743 744struct local_info { // C++20745 static constexpr int unique = 0;746 static constexpr int nonexistent = 1;747 static constexpr int ambiguous = 2;748 749 int result;750 sys_info first;751 sys_info second;752};753 754template<class charT, class traits> // C++20755 basic_ostream<charT, traits>&756 operator<<(basic_ostream<charT, traits>& os, const local_info& li);757 758// 25.10.5, class time_zone // C++20759enum class choose {earliest, latest};760class time_zone {761 time_zone(time_zone&&) = default;762 time_zone& operator=(time_zone&&) = default;763 764 // unspecified additional constructors765 766 string_view name() const noexcept;767 768 template<class Duration>769 sys_info get_info(const sys_time<Duration>& st) const;770 771 template<class Duration>772 local_info get_info(const local_time<Duration>& tp) const;773 774 template<class Duration>775 sys_time<common_type_t<Duration, seconds>>776 to_sys(const local_time<Duration>& tp) const;777 778 template<class Duration>779 sys_time<common_type_t<Duration, seconds>>780 to_sys(const local_time<Duration>& tp, choose z) const;781 782 template<class Duration>783 local_time<common_type_t<Duration, seconds>>784 to_local(const sys_time<Duration>& tp) const;785};786bool operator==(const time_zone& x, const time_zone& y) noexcept; // C++20787strong_ordering operator<=>(const time_zone& x, const time_zone& y) noexcept; // C++20788 789// [time.zone.zonedtraits], class template zoned_traits790template<class T> struct zoned_traits; // C++20791 792// [time.zone.zonedtime], class template zoned_time793template<class Duration, class TimeZonePtr = const time_zone*> // C++20794class zoned_time;795 796using zoned_seconds = zoned_time<seconds>; // C++20797 798template<class Duration1, class Duration2, class TimeZonePtr> // C++20799 bool operator==(const zoned_time<Duration1, TimeZonePtr>& x,800 const zoned_time<Duration2, TimeZonePtr>& y);801 802template<class charT, class traits, class Duration, class TimeZonePtr> // C++20803 basic_ostream<charT, traits>&804 operator<<(basic_ostream<charT, traits>& os,805 const zoned_time<Duration, TimeZonePtr>& t);806 807// [time.zone.leap], leap second support808class leap_second { // C++20809public:810 leap_second(const leap_second&) = default;811 leap_second& operator=(const leap_second&) = default;812 813 // unspecified additional constructors814 815 constexpr sys_seconds date() const noexcept;816 constexpr seconds value() const noexcept;817};818 819constexpr bool operator==(const leap_second& x, const leap_second& y); // C++20820constexpr strong_ordering operator<=>(const leap_second& x, const leap_second& y);821 822template<class Duration> // C++20823 constexpr bool operator==(const leap_second& x, const sys_time<Duration>& y);824template<class Duration> // C++20825 constexpr bool operator< (const leap_second& x, const sys_time<Duration>& y);826template<class Duration> // C++20827 constexpr bool operator< (const sys_time<Duration>& x, const leap_second& y);828template<class Duration> // C++20829 constexpr bool operator> (const leap_second& x, const sys_time<Duration>& y);830template<class Duration> // C++20831 constexpr bool operator> (const sys_time<Duration>& x, const leap_second& y);832template<class Duration> // C++20833 constexpr bool operator<=(const leap_second& x, const sys_time<Duration>& y);834template<class Duration> // C++20835 constexpr bool operator<=(const sys_time<Duration>& x, const leap_second& y);836template<class Duration> // C++20837 constexpr bool operator>=(const leap_second& x, const sys_time<Duration>& y);838template<class Duration> // C++20839 constexpr bool operator>=(const sys_time<Duration>& x, const leap_second& y);840template<class Duration> // C++20841 requires three_way_comparable_with<sys_seconds, sys_time<Duration>>842 constexpr auto operator<=>(const leap_second& x, const sys_time<Duration>& y);843 844// [time.zone.link], class time_zone_link845class time_zone_link { // C++20846public:847 time_zone_link(time_zone_link&&) = default;848 time_zone_link& operator=(time_zone_link&&) = default;849 850 // unspecified additional constructors851 852 string_view name() const noexcept;853 string_view target() const noexcept;854};855 856bool operator==(const time_zone_link& x, const time_zone_link& y); // C++20857strong_ordering operator<=>(const time_zone_link& x, const time_zone_link& y); // C++20858 859} // chrono860 861namespace std {862 template<class Duration, class charT>863 struct formatter<chrono::sys_time<Duration>, charT>; // C++20864 template<class Duration, class charT>865 struct formatter<chrono::filetime<Duration>, charT>; // C++20866 template<class Duration, class charT>867 struct formatter<chrono::local_time<Duration>, charT>; // C++20868 template<class Rep, class Period, class charT>869 struct formatter<chrono::duration<Rep, Period>, charT>; // C++20870 template<class charT> struct formatter<chrono::day, charT>; // C++20871 template<class charT> struct formatter<chrono::month, charT>; // C++20872 template<class charT> struct formatter<chrono::year, charT>; // C++20873 template<class charT> struct formatter<chrono::weekday, charT>; // C++20874 template<class charT> struct formatter<chrono::weekday_indexed, charT>; // C++20875 template<class charT> struct formatter<chrono::weekday_last, charT>; // C++20876 template<class charT> struct formatter<chrono::month_day, charT>; // C++20877 template<class charT> struct formatter<chrono::month_day_last, charT>; // C++20878 template<class charT> struct formatter<chrono::month_weekday, charT>; // C++20879 template<class charT> struct formatter<chrono::month_weekday_last, charT>; // C++20880 template<class charT> struct formatter<chrono::year_month, charT>; // C++20881 template<class charT> struct formatter<chrono::year_month_day, charT>; // C++20882 template<class charT> struct formatter<chrono::year_month_day_last, charT>; // C++20883 template<class charT> struct formatter<chrono::year_month_weekday, charT>; // C++20884 template<class charT> struct formatter<chrono::year_month_weekday_last, charT>; // C++20885 template<class Rep, class Period, class charT>886 struct formatter<chrono::hh_mm_ss<duration<Rep, Period>>, charT>; // C++20887 template<class charT> struct formatter<chrono::sys_info, charT>; // C++20888 template<class charT> struct formatter<chrono::local_info, charT>; // C++20889 template<class Duration, class TimeZonePtr, class charT> // C++20890 struct formatter<chrono::zoned_time<Duration, TimeZonePtr>, charT>;891} // namespace std892 893namespace chrono {894// calendrical constants895inline constexpr last_spec last{}; // C++20896inline constexpr chrono::weekday Sunday{0}; // C++20897inline constexpr chrono::weekday Monday{1}; // C++20898inline constexpr chrono::weekday Tuesday{2}; // C++20899inline constexpr chrono::weekday Wednesday{3}; // C++20900inline constexpr chrono::weekday Thursday{4}; // C++20901inline constexpr chrono::weekday Friday{5}; // C++20902inline constexpr chrono::weekday Saturday{6}; // C++20903 904inline constexpr chrono::month January{1}; // C++20905inline constexpr chrono::month February{2}; // C++20906inline constexpr chrono::month March{3}; // C++20907inline constexpr chrono::month April{4}; // C++20908inline constexpr chrono::month May{5}; // C++20909inline constexpr chrono::month June{6}; // C++20910inline constexpr chrono::month July{7}; // C++20911inline constexpr chrono::month August{8}; // C++20912inline constexpr chrono::month September{9}; // C++20913inline constexpr chrono::month October{10}; // C++20914inline constexpr chrono::month November{11}; // C++20915inline constexpr chrono::month December{12}; // C++20916} // chrono917 918inline namespace literals {919 inline namespace chrono_literals {920constexpr chrono::hours operator ""h(unsigned long long); // C++14921constexpr chrono::duration<unspecified , ratio<3600,1>> operator ""h(long double); // C++14922constexpr chrono::minutes operator ""min(unsigned long long); // C++14923constexpr chrono::duration<unspecified , ratio<60,1>> operator ""min(long double); // C++14924constexpr chrono::seconds operator ""s(unsigned long long); // C++14925constexpr chrono::duration<unspecified > operator ""s(long double); // C++14926constexpr chrono::milliseconds operator ""ms(unsigned long long); // C++14927constexpr chrono::duration<unspecified , milli> operator ""ms(long double); // C++14928constexpr chrono::microseconds operator ""us(unsigned long long); // C++14929constexpr chrono::duration<unspecified , micro> operator ""us(long double); // C++14930constexpr chrono::nanoseconds operator ""ns(unsigned long long); // C++14931constexpr chrono::duration<unspecified , nano> operator ""ns(long double); // C++14932constexpr chrono::day operator ""d(unsigned long long d) noexcept; // C++20933constexpr chrono::year operator ""y(unsigned long long y) noexcept; // C++20934} // chrono_literals935} // literals936 937} // std938*/939 940// clang-format on941 942#include <__cxx03/__config>943 944#include <__cxx03/__chrono/duration.h>945#include <__cxx03/__chrono/high_resolution_clock.h>946#include <__cxx03/__chrono/steady_clock.h>947#include <__cxx03/__chrono/system_clock.h>948#include <__cxx03/__chrono/time_point.h>949 950#include <__cxx03/version>951 952#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)953# pragma GCC system_header954#endif955 956#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES)957# include <__cxx03/cstdint>958# include <__cxx03/stdexcept>959# include <__cxx03/string_view>960# include <__cxx03/vector>961#endif962 963#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES)964# include <__cxx03/cstring>965# include <__cxx03/forward_list>966# include <__cxx03/string>967#endif968 969#endif // _LIBCPP___CXX03_CHRONO970