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#ifndef _LIBCPP_CHRONO 11#define _LIBCPP_CHRONO 12 13// clang-format off 14 15/* 16 chrono synopsis 17 18#include <compare> // C++20 19 20namespace std 21{ 22namespace chrono 23{ 24 25template <class ToDuration, class Rep, class Period> 26constexpr 27ToDuration 28duration_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_v 33 = treat_as_floating_point<Rep>::value; // C++17 34 35template <class Rep> 36struct duration_values 37{ 38public: 39 static constexpr Rep zero(); // noexcept in C++20 40 static constexpr Rep max(); // noexcept in C++20 41 static constexpr Rep min(); // noexcept in C++20 42}; 43 44// duration 45 46template <class Rep, class Period = ratio<1>> 47class duration 48{ 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_if 60 < 61 is_convertible<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 // conversions 67 template <class Rep2, class Period2> 68 constexpr duration(const duration<Rep2, Period2>& d, 69 typename enable_if 70 < 71 treat_as_floating_point<rep>::value || 72 ratio_divide<Period2, period>::type::den == 1 73 >::type* = 0); 74 75 // observer 76 77 constexpr rep count() const; 78 79 // arithmetic 80 81 constexpr common_type<duration>::type operator+() const; 82 constexpr common_type<duration>::type operator-() const; 83 constexpr duration& operator++(); // constexpr in C++17 84 constexpr duration operator++(int); // constexpr in C++17 85 constexpr duration& operator--(); // constexpr in C++17 86 constexpr duration operator--(int); // constexpr in C++17 87 88 constexpr duration& operator+=(const duration& d); // constexpr in C++17 89 constexpr duration& operator-=(const duration& d); // constexpr in C++17 90 91 duration& operator*=(const rep& rhs); // constexpr in C++17 92 duration& operator/=(const rep& rhs); // constexpr in C++17 93 duration& operator%=(const rep& rhs); // constexpr in C++17 94 duration& operator%=(const duration& rhs); // constexpr in C++17 95 96 // special values 97 98 static constexpr duration zero(); // noexcept in C++20 99 static constexpr duration min(); // noexcept in C++20 100 static constexpr duration max(); // noexcept in C++20 101}; 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_point 112{ 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 only 120 121public: 122 time_point(); // has value "epoch" // constexpr in C++14 123 explicit time_point(const duration& d); // same as time_point() + d // constexpr in C++14 124 125 // conversions 126 template <class Duration2> 127 time_point(const time_point<clock, Duration2>& t); // constexpr in C++14 128 129 // observer 130 131 duration time_since_epoch() const; // constexpr in C++14 132 133 // arithmetic 134 135 time_point& operator+=(const duration& d); // constexpr in C++17 136 time_point& operator-=(const duration& d); // constexpr in C++17 137 138 // special values 139 140 static constexpr time_point min(); // noexcept in C++20 141 static constexpr time_point max(); // noexcept in C++20 142}; 143 144} // chrono 145 146// common_type traits 147template <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 arithmetic 156template <class Rep1, class Period1, class Rep2, class Period2> 157 constexpr 158 typename common_type<duration<Rep1, Period1>, duration<Rep2, Period2>>::type 159 operator+(const duration<Rep1, Period1>& lhs, const duration<Rep2, Period2>& rhs); 160template <class Rep1, class Period1, class Rep2, class Period2> 161 constexpr 162 typename common_type<duration<Rep1, Period1>, duration<Rep2, Period2>>::type 163 operator-(const duration<Rep1, Period1>& lhs, const duration<Rep2, Period2>& rhs); 164template <class Rep1, class Period, class Rep2> 165 constexpr 166 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 constexpr 170 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 constexpr 174 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 constexpr 178 typename common_type<Rep1, Rep2>::type 179 operator/(const duration<Rep1, Period1>& lhs, const duration<Rep2, Period2>& rhs); 180 181// duration comparisons 182template <class Rep1, class Period1, class Rep2, class Period2> 183 constexpr 184 bool operator==(const duration<Rep1, Period1>& lhs, const duration<Rep2, Period2>& rhs); 185template <class Rep1, class Period1, class Rep2, class Period2> 186 constexpr 187 bool operator!=(const duration<Rep1, Period1>& lhs, const duration<Rep2, Period2>& rhs); // removed in C++20 188template <class Rep1, class Period1, class Rep2, class Period2> 189 constexpr 190 bool operator< (const duration<Rep1, Period1>& lhs, const duration<Rep2, Period2>& rhs); 191template <class Rep1, class Period1, class Rep2, class Period2> 192 constexpr 193 bool operator<=(const duration<Rep1, Period1>& lhs, const duration<Rep2, Period2>& rhs); 194template <class Rep1, class Period1, class Rep2, class Period2> 195 constexpr 196 bool operator> (const duration<Rep1, Period1>& lhs, const duration<Rep2, Period2>& rhs); 197template <class Rep1, class Period1, class Rep2, class Period2> 198 constexpr 199 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++20 204 205// duration_cast 206template <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++17 211template <class ToDuration, class Rep, class Period> 212 constexpr ToDuration ceil(const duration<Rep, Period>& d); // C++17 213template <class ToDuration, class Rep, class Period> 214 constexpr ToDuration round(const duration<Rep, Period>& d); // C++17 215 216// duration I/O 217template<class charT, class traits, class Rep, class Period> // C++20 218 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>::type 234 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++20 241template <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++20 253 254// 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++17 262 263template <class ToDuration, class Clock, class Duration> 264 constexpr time_point<Clock, ToDuration> 265 ceil(const time_point<Clock, Duration>& tp); // C++17 266 267template <class ToDuration, class Clock, class Duration> 268 constexpr time_point<Clock, ToDuration> 269 round(const time_point<Clock, Duration>& tp); // C++17 270 271template <class Rep, class Period> 272 constexpr duration<Rep, Period> abs(duration<Rep, Period> d); // C++17 273 274// Clocks 275 276class system_clock 277{ 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++14 284 285 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++20 292using sys_seconds = sys_time<seconds>; // C++20 293using sys_days = sys_time<days>; // C++20 294 295template<class charT, class traits, class Duration> // C++20 296 basic_ostream<charT, traits>& 297 operator<<(basic_ostream<charT, traits>& os, const sys_time<Duration>& tp); 298 299class file_clock // C++20 300{ 301public: 302 typedef see-below rep; 303 typedef nano period; 304 typedef chrono::duration<rep, period> duration; 305 typedef chrono::time_point<file_clock> time_point; 306 static constexpr bool is_steady = false; 307 308 static time_point now() noexcept; 309 310 template<class Duration> 311 static sys_time<see-below> to_sys(const file_time<Duration>&); 312 313 template<class Duration> 314 static file_time<see-below> from_sys(const sys_time<Duration>&); 315}; 316 317template<class Duration> 318 using file_time = time_point<file_clock, Duration>; // C++20 319 320template<class charT, class traits, class Duration> // C++20 321 basic_ostream<charT, traits>& 322 operator<<(basic_ostream<charT, traits>& os, const file_time<Duration>& tp); 323 324class steady_clock 325{ 326public: 327 typedef nanoseconds duration; 328 typedef duration::rep rep; 329 typedef duration::period period; 330 typedef chrono::time_point<steady_clock, duration> time_point; 331 static const bool is_steady = true; // constexpr in C++14 332 333 static time_point now() noexcept; 334}; 335 336typedef steady_clock high_resolution_clock; 337 338// 25.7.8, local time // C++20 339struct local_t {}; 340template<class Duration> 341 using local_time = time_point<local_t, Duration>; 342using local_seconds = local_time<seconds>; 343using local_days = local_time<days>; 344 345template<class charT, class traits, class Duration> // C++20 346 basic_ostream<charT, traits>& 347 operator<<(basic_ostream<charT, traits>& os, const local_time<Duration>& tp); 348 349// 25.8.2, class last_spec // C++20 350struct last_spec; 351 352// 25.8.3, class day // C++20 353 354class day; 355constexpr bool operator==(const day& x, const day& y) noexcept; 356constexpr strong_ordering operator<=>(const day& x, const day& y) noexcept; 357constexpr day operator+(const day& x, const days& y) noexcept; 358constexpr day operator+(const days& x, const day& y) noexcept; 359constexpr day operator-(const day& x, const days& y) noexcept; 360constexpr days operator-(const day& x, const day& y) noexcept; 361template<class charT, class traits> 362 basic_ostream<charT, traits>& 363 operator<<(basic_ostream<charT, traits>& os, const day& d); 364 365// 25.8.4, class month // C++20 366class month; 367constexpr bool operator==(const month& x, const month& y) noexcept; 368constexpr strong_ordering operator<=>(const month& x, const month& y) noexcept; 369 370constexpr month operator+(const month& x, const months& y) noexcept; 371constexpr month operator+(const months& x, const month& y) noexcept; 372constexpr month operator-(const month& x, const months& y) noexcept; 373constexpr months operator-(const month& x, const month& y) noexcept; 374template<class charT, class traits> 375 basic_ostream<charT, traits>& 376 operator<<(basic_ostream<charT, traits>& os, const month& m); 377 378// 25.8.5, class year // C++20 379class year; 380constexpr bool operator==(const year& x, const year& y) noexcept; 381constexpr strong_ordering operator<=>(const year& x, const year& y) noexcept; 382 383constexpr year operator+(const year& x, const years& y) noexcept; 384constexpr year operator+(const years& x, const year& y) noexcept; 385constexpr year operator-(const year& x, const years& y) noexcept; 386constexpr years operator-(const year& x, const year& y) noexcept; 387template<class charT, class traits> 388 basic_ostream<charT, traits>& 389 operator<<(basic_ostream<charT, traits>& os, const year& y); 390 391// 25.8.6, class weekday // C++20 392class weekday; 393 394constexpr bool operator==(const weekday& x, const weekday& y) noexcept; 395constexpr weekday operator+(const weekday& x, const days& y) noexcept; 396constexpr weekday operator+(const days& x, const weekday& y) noexcept; 397constexpr weekday operator-(const weekday& x, const days& y) noexcept; 398constexpr days operator-(const weekday& x, const weekday& y) noexcept; 399template<class charT, class traits> 400 basic_ostream<charT, traits>& 401 operator<<(basic_ostream<charT, traits>& os, const weekday& wd); 402 403// 25.8.7, class weekday_indexed // C++20 404 405class weekday_indexed; 406constexpr bool operator==(const weekday_indexed& x, const weekday_indexed& y) noexcept; 407 408template<class charT, class traits> 409 basic_ostream<charT, traits>& 410 operator<<(basic_ostream<charT, traits>& os, const weekday_indexed& wdi); 411 412// 25.8.8, class weekday_last // C++20 413class weekday_last; 414 415constexpr bool operator==(const weekday_last& x, const weekday_last& y) noexcept; 416 417template<class charT, class traits> 418 basic_ostream<charT, traits>& 419 operator<<(basic_ostream<charT, traits>& os, const weekday_last& wdl); 420 421// 25.8.9, class month_day // C++20 422class month_day; 423 424constexpr bool operator==(const month_day& x, const month_day& y) noexcept; 425constexpr strong_ordering operator<=>(const month_day& x, const month_day& y) noexcept; 426 427template<class charT, class traits> 428 basic_ostream<charT, traits>& 429 operator<<(basic_ostream<charT, traits>& os, const month_day& md); 430 431// 25.8.10, class month_day_last // C++20 432class month_day_last; 433 434constexpr bool operator==(const month_day_last& x, const month_day_last& y) noexcept; 435constexpr strong_ordering operator<=>(const month_day_last& x, const month_day_last& y) noexcept; 436 437template<class charT, class traits> 438 basic_ostream<charT, traits>& 439 operator<<(basic_ostream<charT, traits>& os, const month_day_last& mdl); 440 441// 25.8.11, class month_weekday // C++20 442class month_weekday; 443 444constexpr bool operator==(const month_weekday& x, const month_weekday& y) noexcept; 445 446template<class charT, class traits> 447 basic_ostream<charT, traits>& 448 operator<<(basic_ostream<charT, traits>& os, const month_weekday& mwd); 449 450// 25.8.12, class month_weekday_last // C++20 451class month_weekday_last; 452 453constexpr bool operator==(const month_weekday_last& x, const month_weekday_last& y) noexcept; 454 455template<class charT, class traits> 456 basic_ostream<charT, traits>& 457 operator<<(basic_ostream<charT, traits>& os, const month_weekday_last& mwdl); 458 459 460// 25.8.13, class year_month // C++20 461class year_month; 462 463constexpr bool operator==(const year_month& x, const year_month& y) noexcept; 464constexpr strong_ordering operator<=>(const year_month& x, const year_month& y) noexcept; 465 466constexpr year_month operator+(const year_month& ym, const months& dm) noexcept; 467constexpr year_month operator+(const months& dm, const year_month& ym) noexcept; 468constexpr year_month operator-(const year_month& ym, const months& dm) noexcept; 469constexpr months operator-(const year_month& x, const year_month& y) noexcept; 470constexpr year_month operator+(const year_month& ym, const years& dy) noexcept; 471constexpr year_month operator+(const years& dy, const year_month& ym) noexcept; 472constexpr year_month operator-(const year_month& ym, const years& dy) noexcept; 473 474template<class charT, class traits> 475 basic_ostream<charT, traits>& 476 operator<<(basic_ostream<charT, traits>& os, const year_month& ym); 477 478// 25.8.14, class year_month_day class // C++20 479year_month_day; 480 481constexpr bool operator==(const year_month_day& x, const year_month_day& y) noexcept; 482constexpr strong_ordering operator<=>(const year_month_day& x, const year_month_day& y) noexcept; 483 484constexpr year_month_day operator+(const year_month_day& ymd, const months& dm) noexcept; 485constexpr year_month_day operator+(const months& dm, const year_month_day& ymd) noexcept; 486constexpr year_month_day operator+(const year_month_day& ymd, const years& dy) noexcept; 487constexpr year_month_day operator+(const years& dy, const year_month_day& ymd) noexcept; 488constexpr year_month_day operator-(const year_month_day& ymd, const months& dm) noexcept; 489constexpr year_month_day operator-(const year_month_day& ymd, const years& dy) noexcept; 490 491template<class charT, class traits> 492 basic_ostream<charT, traits>& 493 operator<<(basic_ostream<charT, traits>& os, const year_month_day& ymd); 494 495// 25.8.15, class year_month_day_last // C++20 496class year_month_day_last; 497 498constexpr bool operator==(const year_month_day_last& x, const year_month_day_last& y) noexcept; 499constexpr strong_ordering operator<=>(const year_month_day_last_day& x, const year_month_day_last_day& y) noexcept; 500 501constexpr year_month_day_last 502 operator+(const year_month_day_last& ymdl, const months& dm) noexcept; 503constexpr year_month_day_last 504 operator+(const months& dm, const year_month_day_last& ymdl) noexcept; 505constexpr year_month_day_last 506 operator+(const year_month_day_last& ymdl, const years& dy) noexcept; 507constexpr year_month_day_last 508 operator+(const years& dy, const year_month_day_last& ymdl) noexcept; 509constexpr year_month_day_last 510 operator-(const year_month_day_last& ymdl, const months& dm) noexcept; 511constexpr year_month_day_last 512 operator-(const year_month_day_last& ymdl, const years& dy) noexcept; 513 514template<class charT, class traits> 515 basic_ostream<charT, traits>& 516 operator<<(basic_ostream<charT, traits>& os, const year_month_day_last& ymdl); 517 518// 25.8.16, class year_month_weekday // C++20 519class year_month_weekday; 520 521constexpr bool operator==(const year_month_weekday& x, 522 const year_month_weekday& y) noexcept; 523 524constexpr year_month_weekday 525 operator+(const year_month_weekday& ymwd, const months& dm) noexcept; 526constexpr year_month_weekday 527 operator+(const months& dm, const year_month_weekday& ymwd) noexcept; 528constexpr year_month_weekday 529 operator+(const year_month_weekday& ymwd, const years& dy) noexcept; 530constexpr year_month_weekday 531 operator+(const years& dy, const year_month_weekday& ymwd) noexcept; 532constexpr year_month_weekday 533 operator-(const year_month_weekday& ymwd, const months& dm) noexcept; 534constexpr year_month_weekday 535 operator-(const year_month_weekday& ymwd, const years& dy) noexcept; 536 537template<class charT, class traits> 538 basic_ostream<charT, traits>& 539 operator<<(basic_ostream<charT, traits>& os, const year_month_weekday& ymwd); 540 541// 25.8.17, class year_month_weekday_last // C++20 542class year_month_weekday_last; 543 544constexpr bool operator==(const year_month_weekday_last& x, 545 const year_month_weekday_last& y) noexcept; 546constexpr year_month_weekday_last 547 operator+(const year_month_weekday_last& ymwdl, const months& dm) noexcept; 548constexpr year_month_weekday_last 549 operator+(const months& dm, const year_month_weekday_last& ymwdl) noexcept; 550constexpr year_month_weekday_last 551 operator+(const year_month_weekday_last& ymwdl, const years& dy) noexcept; 552constexpr year_month_weekday_last 553 operator+(const years& dy, const year_month_weekday_last& ymwdl) noexcept; 554constexpr year_month_weekday_last 555 operator-(const year_month_weekday_last& ymwdl, const months& dm) noexcept; 556constexpr year_month_weekday_last 557 operator-(const year_month_weekday_last& ymwdl, const years& dy) noexcept; 558 559template<class charT, class traits> 560 basic_ostream<charT, traits>& 561 operator<<(basic_ostream<charT, traits>& os, const year_month_weekday_last& ymwdl); 562 563// 25.8.18, civil calendar conventional syntax operators // C++20 564constexpr year_month 565 operator/(const year& y, const month& m) noexcept; 566constexpr year_month 567 operator/(const year& y, int m) noexcept; 568constexpr month_day 569 operator/(const month& m, const day& d) noexcept; 570constexpr month_day 571 operator/(const month& m, int d) noexcept; 572constexpr month_day 573 operator/(int m, const day& d) noexcept; 574constexpr month_day 575 operator/(const day& d, const month& m) noexcept; 576constexpr month_day 577 operator/(const day& d, int m) noexcept; 578constexpr month_day_last 579 operator/(const month& m, last_spec) noexcept; 580constexpr month_day_last 581 operator/(int m, last_spec) noexcept; 582constexpr month_day_last 583 operator/(last_spec, const month& m) noexcept; 584constexpr month_day_last 585 operator/(last_spec, int m) noexcept; 586constexpr month_weekday 587 operator/(const month& m, const weekday_indexed& wdi) noexcept; 588constexpr month_weekday 589 operator/(int m, const weekday_indexed& wdi) noexcept; 590constexpr month_weekday 591 operator/(const weekday_indexed& wdi, const month& m) noexcept; 592constexpr month_weekday 593 operator/(const weekday_indexed& wdi, int m) noexcept; 594constexpr month_weekday_last 595 operator/(const month& m, const weekday_last& wdl) noexcept; 596constexpr month_weekday_last 597 operator/(int m, const weekday_last& wdl) noexcept; 598constexpr month_weekday_last 599 operator/(const weekday_last& wdl, const month& m) noexcept; 600constexpr month_weekday_last 601 operator/(const weekday_last& wdl, int m) noexcept; 602constexpr year_month_day 603 operator/(const year_month& ym, const day& d) noexcept; 604constexpr year_month_day 605 operator/(const year_month& ym, int d) noexcept; 606constexpr year_month_day 607 operator/(const year& y, const month_day& md) noexcept; 608constexpr year_month_day 609 operator/(int y, const month_day& md) noexcept; 610constexpr year_month_day 611 operator/(const month_day& md, const year& y) noexcept; 612constexpr year_month_day 613 operator/(const month_day& md, int y) noexcept; 614constexpr year_month_day_last 615 operator/(const year_month& ym, last_spec) noexcept; 616constexpr year_month_day_last 617 operator/(const year& y, const month_day_last& mdl) noexcept; 618constexpr year_month_day_last 619 operator/(int y, const month_day_last& mdl) noexcept; 620constexpr year_month_day_last 621 operator/(const month_day_last& mdl, const year& y) noexcept; 622constexpr year_month_day_last 623 operator/(const month_day_last& mdl, int y) noexcept; 624constexpr year_month_weekday 625 operator/(const year_month& ym, const weekday_indexed& wdi) noexcept; 626constexpr year_month_weekday 627 operator/(const year& y, const month_weekday& mwd) noexcept; 628constexpr year_month_weekday 629 operator/(int y, const month_weekday& mwd) noexcept; 630constexpr year_month_weekday 631 operator/(const month_weekday& mwd, const year& y) noexcept; 632constexpr year_month_weekday 633 operator/(const month_weekday& mwd, int y) noexcept; 634constexpr year_month_weekday_last 635 operator/(const year_month& ym, const weekday_last& wdl) noexcept; 636constexpr year_month_weekday_last 637 operator/(const year& y, const month_weekday_last& mwdl) noexcept; 638constexpr year_month_weekday_last 639 operator/(int y, const month_weekday_last& mwdl) noexcept; 640constexpr year_month_weekday_last 641 operator/(const month_weekday_last& mwdl, const year& y) noexcept; 642constexpr year_month_weekday_last 643 operator/(const month_weekday_last& mwdl, int y) noexcept; 644 645// 26.9, class template hh_mm_ss 646template <class Duration> 647class hh_mm_ss 648{ 649 bool is_neg; // exposition only 650 chrono::hours h; // exposition only 651 chrono::minutes m; // exposition only 652 chrono::seconds s; // exposition only 653 precision ss; // exposition only 654 655public: 656 static unsigned constexpr fractional_width = see below; 657 using precision = see below; 658 659 constexpr hh_mm_ss() noexcept : hh_mm_ss{Duration::zero()} {} 660 constexpr explicit hh_mm_ss(Duration d) noexcept; 661 662 constexpr bool is_negative() const noexcept; 663 constexpr chrono::hours hours() const noexcept; 664 constexpr chrono::minutes minutes() const noexcept; 665 constexpr chrono::seconds seconds() const noexcept; 666 constexpr precision subseconds() const noexcept; 667 668 constexpr explicit operator precision() const noexcept; 669 constexpr precision to_duration() const noexcept; 670}; 671 672template<class charT, class traits, class Duration> 673 basic_ostream<charT, traits>& 674 operator<<(basic_ostream<charT, traits>& os, const hh_mm_ss<Duration>& hms); // C++20 675 676// 26.10, 12/24 hour functions 677constexpr bool is_am(hours const& h) noexcept; 678constexpr bool is_pm(hours const& h) noexcept; 679constexpr hours make12(const hours& h) noexcept; 680constexpr hours make24(const hours& h, bool is_pm) noexcept; 681 682// [time.zone.db], time zone database 683struct tzdb { // C++20 684 string version; 685}; 686 687class tzdb_list { // C++20 688public: 689 tzdb_list(const tzdb_list&) = delete; 690 tzdb_list& operator=(const tzdb_list&) = delete; 691 692 // unspecified additional constructors 693 694 class const_iterator; 695 696 const tzdb& front() const noexcept; 697 698 const_iterator erase_after(const_iterator p); 699 700 const_iterator begin() const noexcept; 701 const_iterator end() const noexcept; 702 703 const_iterator cbegin() const noexcept; 704 const_iterator cend() const noexcept; 705}; 706 707// [time.zone.db.access], time zone database access 708const tzdb& get_tzdb(); // C++20 709tzdb_list& get_tzdb_list(); // C++20 710 711// [time.zone.db.remote], remote time zone database support 712const tzdb& reload_tzdb(); // C++20 713string remote_version(); // C++20 714 715// 25.10.5, class time_zone // C++20 716enum class choose {earliest, latest}; 717class time_zone; 718bool operator==(const time_zone& x, const time_zone& y) noexcept; 719bool operator!=(const time_zone& x, const time_zone& y) noexcept; 720bool operator<(const time_zone& x, const time_zone& y) noexcept; 721bool operator>(const time_zone& x, const time_zone& y) noexcept; 722bool operator<=(const time_zone& x, const time_zone& y) noexcept; 723bool operator>=(const time_zone& x, const time_zone& y) noexcept; 724} // chrono 725 726namespace std { 727 template<class Duration, class charT> 728 struct formatter<chrono::sys_time<Duration>, charT>; // C++20 729 template<class Duration, class charT> 730 struct formatter<chrono::filetime<Duration>, charT>; // C++20 731 template<class Duration, class charT> 732 struct formatter<chrono::local_time<Duration>, charT>; // C++20 733 template<class Rep, class Period, class charT> 734 struct formatter<chrono::duration<Rep, Period>, charT>; // C++20 735 template<class charT> struct formatter<chrono::day, charT>; // C++20 736 template<class charT> struct formatter<chrono::month, charT>; // C++20 737 template<class charT> struct formatter<chrono::year, charT>; // C++20 738 template<class charT> struct formatter<chrono::weekday, charT>; // C++20 739 template<class charT> struct formatter<chrono::weekday_indexed, charT>; // C++20 740 template<class charT> struct formatter<chrono::weekday_last, charT>; // C++20 741 template<class charT> struct formatter<chrono::month_day, charT>; // C++20 742 template<class charT> struct formatter<chrono::month_day_last, charT>; // C++20 743 template<class charT> struct formatter<chrono::month_weekday, charT>; // C++20 744 template<class charT> struct formatter<chrono::month_weekday_last, charT>; // C++20 745 template<class charT> struct formatter<chrono::year_month, charT>; // C++20 746 template<class charT> struct formatter<chrono::year_month_day, charT>; // C++20 747 template<class charT> struct formatter<chrono::year_month_day_last, charT>; // C++20 748 template<class charT> struct formatter<chrono::year_month_weekday, charT>; // C++20 749 template<class charT> struct formatter<chrono::year_month_weekday_last, charT>; // C++20 750 template<class Rep, class Period, class charT> 751 struct formatter<chrono::hh_mm_ss<duration<Rep, Period>>, charT>; // C++20 752} // namespace std 753 754namespace chrono { 755// calendrical constants 756inline constexpr last_spec last{}; // C++20 757inline constexpr chrono::weekday Sunday{0}; // C++20 758inline constexpr chrono::weekday Monday{1}; // C++20 759inline constexpr chrono::weekday Tuesday{2}; // C++20 760inline constexpr chrono::weekday Wednesday{3}; // C++20 761inline constexpr chrono::weekday Thursday{4}; // C++20 762inline constexpr chrono::weekday Friday{5}; // C++20 763inline constexpr chrono::weekday Saturday{6}; // C++20 764 765inline constexpr chrono::month January{1}; // C++20 766inline constexpr chrono::month February{2}; // C++20 767inline constexpr chrono::month March{3}; // C++20 768inline constexpr chrono::month April{4}; // C++20 769inline constexpr chrono::month May{5}; // C++20 770inline constexpr chrono::month June{6}; // C++20 771inline constexpr chrono::month July{7}; // C++20 772inline constexpr chrono::month August{8}; // C++20 773inline constexpr chrono::month September{9}; // C++20 774inline constexpr chrono::month October{10}; // C++20 775inline constexpr chrono::month November{11}; // C++20 776inline constexpr chrono::month December{12}; // C++20 777} // chrono 778 779inline namespace literals { 780 inline namespace chrono_literals { 781constexpr chrono::hours operator ""h(unsigned long long); // C++14 782constexpr chrono::duration<unspecified , ratio<3600,1>> operator ""h(long double); // C++14 783constexpr chrono::minutes operator ""min(unsigned long long); // C++14 784constexpr chrono::duration<unspecified , ratio<60,1>> operator ""min(long double); // C++14 785constexpr chrono::seconds operator ""s(unsigned long long); // C++14 786constexpr chrono::duration<unspecified > operator ""s(long double); // C++14 787constexpr chrono::milliseconds operator ""ms(unsigned long long); // C++14 788constexpr chrono::duration<unspecified , milli> operator ""ms(long double); // C++14 789constexpr chrono::microseconds operator ""us(unsigned long long); // C++14 790constexpr chrono::duration<unspecified , micro> operator ""us(long double); // C++14 791constexpr chrono::nanoseconds operator ""ns(unsigned long long); // C++14 792constexpr chrono::duration<unspecified , nano> operator ""ns(long double); // C++14 793constexpr chrono::day operator ""d(unsigned long long d) noexcept; // C++20 794constexpr chrono::year operator ""y(unsigned long long y) noexcept; // C++20 795} // chrono_literals 796} // literals 797 798} // std 799*/ 800 801// clang-format on 802 803#include <__assert> // all public C++ headers provide the assertion handler 804#include <__chrono/calendar.h> 805#include <__chrono/convert_to_timespec.h> 806#include <__chrono/convert_to_tm.h> 807#include <__chrono/day.h> 808#include <__chrono/duration.h> 809#include <__chrono/file_clock.h> 810#include <__chrono/hh_mm_ss.h> 811#include <__chrono/high_resolution_clock.h> 812#include <__chrono/literals.h> 813#include <__chrono/month.h> 814#include <__chrono/month_weekday.h> 815#include <__chrono/monthday.h> 816#include <__chrono/steady_clock.h> 817#include <__chrono/system_clock.h> 818#include <__chrono/time_point.h> 819#include <__chrono/weekday.h> 820#include <__chrono/year.h> 821#include <__chrono/year_month.h> 822#include <__chrono/year_month_day.h> 823#include <__chrono/year_month_weekday.h> 824#include <__config> 825#include <version> 826 827// standard-mandated includes 828 829// [time.syn] 830#include <compare> 831 832#if !defined(_LIBCPP_HAS_NO_LOCALIZATION) && _LIBCPP_STD_VER >= 20 833# include <__chrono/formatter.h> 834# include <__chrono/ostream.h> 835# include <__chrono/parser_std_format_spec.h> 836# include <__chrono/statically_widen.h> 837#endif 838 839#if !defined(_LIBCPP_HAS_NO_TIME_ZONE_DATABASE) && !defined(_LIBCPP_HAS_NO_FILESYSTEM) && \ 840 !defined(_LIBCPP_HAS_NO_LOCALIZATION) 841# include <__chrono/tzdb.h> 842# include <__chrono/tzdb_list.h> 843#endif 844 845#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 846# pragma GCC system_header 847#endif 848 849#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20 850# include <bit> 851# include <concepts> 852# include <cstring> 853# include <forward_list> 854# include <string> 855#endif 856 857#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER == 20 858# include <charconv> 859#endif 860 861#endif // _LIBCPP_CHRONO 862