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<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 // 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 299template<class charT, class traits> // C++20 300 basic_ostream<charT, traits>& 301 operator<<(basic_ostream<charT, traits>& os, const sys_days& dp); 302 303// [time.clock.utc], class utc_clock 304class utc_clock { // C++20 305public: 306 using rep = a signed arithmetic type; 307 using period = ratio<unspecified, unspecified>; 308 using duration = chrono::duration<rep, period>; 309 using time_point = chrono::time_point<utc_clock>; 310 static constexpr bool is_steady = unspecified; 311 312 static time_point now(); 313 314 template<class Duration> 315 static sys_time<common_type_t<Duration, seconds>> 316 to_sys(const utc_time<Duration>& t); 317 template<class Duration> 318 static utc_time<common_type_t<Duration, seconds>> 319 from_sys(const sys_time<Duration>& t); 320}; 321 322template<class Duration> 323using utc_time = time_point<utc_clock, Duration>; // C++20 324using utc_seconds = utc_time<seconds>; // C++20 325 326template<class charT, class traits, class Duration> // C++20 327 basic_ostream<charT, traits>& 328 operator<<(basic_ostream<charT, traits>& os, const utc_time<Duration>& t); 329 330struct leap_second_info { // C++20 331 bool is_leap_second; 332 seconds elapsed; 333}; 334 335template<class Duration> // C++20 336 leap_second_info get_leap_second_info(const utc_time<Duration>& ut); 337 338class file_clock // C++20 339{ 340public: 341 typedef see-below rep; 342 typedef nano period; 343 typedef chrono::duration<rep, period> duration; 344 typedef chrono::time_point<file_clock> time_point; 345 static constexpr bool is_steady = false; 346 347 static time_point now() noexcept; 348 349 template<class Duration> 350 static sys_time<see-below> to_sys(const file_time<Duration>&); 351 352 template<class Duration> 353 static file_time<see-below> from_sys(const sys_time<Duration>&); 354}; 355 356template<class Duration> 357 using file_time = time_point<file_clock, Duration>; // C++20 358 359template<class charT, class traits, class Duration> // C++20 360 basic_ostream<charT, traits>& 361 operator<<(basic_ostream<charT, traits>& os, const file_time<Duration>& tp); 362 363class steady_clock 364{ 365public: 366 typedef nanoseconds duration; 367 typedef duration::rep rep; 368 typedef duration::period period; 369 typedef chrono::time_point<steady_clock, duration> time_point; 370 static const bool is_steady = true; // constexpr in C++14 371 372 static time_point now() noexcept; 373}; 374 375typedef steady_clock high_resolution_clock; 376 377// 25.7.8, local time // C++20 378struct local_t {}; 379template<class Duration> 380 using local_time = time_point<local_t, Duration>; 381using local_seconds = local_time<seconds>; 382using local_days = local_time<days>; 383 384template<class charT, class traits, class Duration> // C++20 385 basic_ostream<charT, traits>& 386 operator<<(basic_ostream<charT, traits>& os, const local_time<Duration>& tp); 387 388// 25.8.2, class last_spec // C++20 389struct last_spec; 390 391// 25.8.3, class day // C++20 392 393class day; 394constexpr bool operator==(const day& x, const day& y) noexcept; 395constexpr strong_ordering operator<=>(const day& x, const day& y) noexcept; 396constexpr day operator+(const day& x, const days& y) noexcept; 397constexpr day operator+(const days& x, const day& y) noexcept; 398constexpr day operator-(const day& x, const days& y) noexcept; 399constexpr days operator-(const day& x, const day& y) noexcept; 400template<class charT, class traits> 401 basic_ostream<charT, traits>& 402 operator<<(basic_ostream<charT, traits>& os, const day& d); 403 404// 25.8.4, class month // C++20 405class month; 406constexpr bool operator==(const month& x, const month& y) noexcept; 407constexpr strong_ordering operator<=>(const month& x, const month& y) noexcept; 408 409constexpr month operator+(const month& x, const months& y) noexcept; 410constexpr month operator+(const months& x, const month& y) noexcept; 411constexpr month operator-(const month& x, const months& y) noexcept; 412constexpr months operator-(const month& x, const month& y) noexcept; 413template<class charT, class traits> 414 basic_ostream<charT, traits>& 415 operator<<(basic_ostream<charT, traits>& os, const month& m); 416 417// 25.8.5, class year // C++20 418class year; 419constexpr bool operator==(const year& x, const year& y) noexcept; 420constexpr strong_ordering operator<=>(const year& x, const year& y) noexcept; 421 422constexpr year operator+(const year& x, const years& y) noexcept; 423constexpr year operator+(const years& x, const year& y) noexcept; 424constexpr year operator-(const year& x, const years& y) noexcept; 425constexpr years operator-(const year& x, const year& y) noexcept; 426template<class charT, class traits> 427 basic_ostream<charT, traits>& 428 operator<<(basic_ostream<charT, traits>& os, const year& y); 429 430// 25.8.6, class weekday // C++20 431class weekday; 432 433constexpr bool operator==(const weekday& x, const weekday& y) noexcept; 434constexpr weekday operator+(const weekday& x, const days& y) noexcept; 435constexpr weekday operator+(const days& x, const weekday& y) noexcept; 436constexpr weekday operator-(const weekday& x, const days& y) noexcept; 437constexpr days operator-(const weekday& x, const weekday& y) noexcept; 438template<class charT, class traits> 439 basic_ostream<charT, traits>& 440 operator<<(basic_ostream<charT, traits>& os, const weekday& wd); 441 442// 25.8.7, class weekday_indexed // C++20 443 444class weekday_indexed; 445constexpr bool operator==(const weekday_indexed& x, const weekday_indexed& y) noexcept; 446 447template<class charT, class traits> 448 basic_ostream<charT, traits>& 449 operator<<(basic_ostream<charT, traits>& os, const weekday_indexed& wdi); 450 451// 25.8.8, class weekday_last // C++20 452class weekday_last; 453 454constexpr bool operator==(const weekday_last& x, const weekday_last& y) noexcept; 455 456template<class charT, class traits> 457 basic_ostream<charT, traits>& 458 operator<<(basic_ostream<charT, traits>& os, const weekday_last& wdl); 459 460// 25.8.9, class month_day // C++20 461class month_day; 462 463constexpr bool operator==(const month_day& x, const month_day& y) noexcept; 464constexpr strong_ordering operator<=>(const month_day& x, const month_day& y) noexcept; 465 466template<class charT, class traits> 467 basic_ostream<charT, traits>& 468 operator<<(basic_ostream<charT, traits>& os, const month_day& md); 469 470// 25.8.10, class month_day_last // C++20 471class month_day_last; 472 473constexpr bool operator==(const month_day_last& x, const month_day_last& y) noexcept; 474constexpr strong_ordering operator<=>(const month_day_last& x, const month_day_last& y) noexcept; 475 476template<class charT, class traits> 477 basic_ostream<charT, traits>& 478 operator<<(basic_ostream<charT, traits>& os, const month_day_last& mdl); 479 480// 25.8.11, class month_weekday // C++20 481class month_weekday; 482 483constexpr bool operator==(const month_weekday& x, const month_weekday& y) noexcept; 484 485template<class charT, class traits> 486 basic_ostream<charT, traits>& 487 operator<<(basic_ostream<charT, traits>& os, const month_weekday& mwd); 488 489// 25.8.12, class month_weekday_last // C++20 490class month_weekday_last; 491 492constexpr bool operator==(const month_weekday_last& x, const month_weekday_last& y) noexcept; 493 494template<class charT, class traits> 495 basic_ostream<charT, traits>& 496 operator<<(basic_ostream<charT, traits>& os, const month_weekday_last& mwdl); 497 498 499// 25.8.13, class year_month // C++20 500class year_month; 501 502constexpr bool operator==(const year_month& x, const year_month& y) noexcept; 503constexpr strong_ordering operator<=>(const year_month& x, const year_month& y) noexcept; 504 505constexpr year_month operator+(const year_month& ym, const months& dm) noexcept; 506constexpr year_month operator+(const months& dm, const year_month& ym) noexcept; 507constexpr year_month operator-(const year_month& ym, const months& dm) noexcept; 508constexpr months operator-(const year_month& x, const year_month& y) noexcept; 509constexpr year_month operator+(const year_month& ym, const years& dy) noexcept; 510constexpr year_month operator+(const years& dy, const year_month& ym) noexcept; 511constexpr year_month operator-(const year_month& ym, const years& dy) noexcept; 512 513template<class charT, class traits> 514 basic_ostream<charT, traits>& 515 operator<<(basic_ostream<charT, traits>& os, const year_month& ym); 516 517// 25.8.14, class year_month_day class // C++20 518year_month_day; 519 520constexpr bool operator==(const year_month_day& x, const year_month_day& y) noexcept; 521constexpr strong_ordering operator<=>(const year_month_day& x, const year_month_day& y) noexcept; 522 523constexpr year_month_day operator+(const year_month_day& ymd, const months& dm) noexcept; 524constexpr year_month_day operator+(const months& dm, const year_month_day& ymd) noexcept; 525constexpr year_month_day operator+(const year_month_day& ymd, const years& dy) noexcept; 526constexpr year_month_day operator+(const years& dy, const year_month_day& ymd) noexcept; 527constexpr year_month_day operator-(const year_month_day& ymd, const months& dm) noexcept; 528constexpr year_month_day operator-(const year_month_day& ymd, const years& dy) noexcept; 529 530template<class charT, class traits> 531 basic_ostream<charT, traits>& 532 operator<<(basic_ostream<charT, traits>& os, const year_month_day& ymd); 533 534// 25.8.15, class year_month_day_last // C++20 535class year_month_day_last; 536 537constexpr bool operator==(const year_month_day_last& x, const year_month_day_last& y) noexcept; 538constexpr strong_ordering operator<=>(const year_month_day_last_day& x, const year_month_day_last_day& y) noexcept; 539 540constexpr year_month_day_last 541 operator+(const year_month_day_last& ymdl, const months& dm) noexcept; 542constexpr year_month_day_last 543 operator+(const months& dm, const year_month_day_last& ymdl) noexcept; 544constexpr year_month_day_last 545 operator+(const year_month_day_last& ymdl, const years& dy) noexcept; 546constexpr year_month_day_last 547 operator+(const years& dy, const year_month_day_last& ymdl) noexcept; 548constexpr year_month_day_last 549 operator-(const year_month_day_last& ymdl, const months& dm) noexcept; 550constexpr year_month_day_last 551 operator-(const year_month_day_last& ymdl, const years& dy) noexcept; 552 553template<class charT, class traits> 554 basic_ostream<charT, traits>& 555 operator<<(basic_ostream<charT, traits>& os, const year_month_day_last& ymdl); 556 557// 25.8.16, class year_month_weekday // C++20 558class year_month_weekday; 559 560constexpr bool operator==(const year_month_weekday& x, 561 const year_month_weekday& y) noexcept; 562 563constexpr year_month_weekday 564 operator+(const year_month_weekday& ymwd, const months& dm) noexcept; 565constexpr year_month_weekday 566 operator+(const months& dm, const year_month_weekday& ymwd) noexcept; 567constexpr year_month_weekday 568 operator+(const year_month_weekday& ymwd, const years& dy) noexcept; 569constexpr year_month_weekday 570 operator+(const years& dy, const year_month_weekday& ymwd) noexcept; 571constexpr year_month_weekday 572 operator-(const year_month_weekday& ymwd, const months& dm) noexcept; 573constexpr year_month_weekday 574 operator-(const year_month_weekday& ymwd, const years& dy) noexcept; 575 576template<class charT, class traits> 577 basic_ostream<charT, traits>& 578 operator<<(basic_ostream<charT, traits>& os, const year_month_weekday& ymwd); 579 580// 25.8.17, class year_month_weekday_last // C++20 581class year_month_weekday_last; 582 583constexpr bool operator==(const year_month_weekday_last& x, 584 const year_month_weekday_last& y) noexcept; 585constexpr year_month_weekday_last 586 operator+(const year_month_weekday_last& ymwdl, const months& dm) noexcept; 587constexpr year_month_weekday_last 588 operator+(const months& dm, const year_month_weekday_last& ymwdl) noexcept; 589constexpr year_month_weekday_last 590 operator+(const year_month_weekday_last& ymwdl, const years& dy) noexcept; 591constexpr year_month_weekday_last 592 operator+(const years& dy, const year_month_weekday_last& ymwdl) noexcept; 593constexpr year_month_weekday_last 594 operator-(const year_month_weekday_last& ymwdl, const months& dm) noexcept; 595constexpr year_month_weekday_last 596 operator-(const year_month_weekday_last& ymwdl, const years& dy) noexcept; 597 598template<class charT, class traits> 599 basic_ostream<charT, traits>& 600 operator<<(basic_ostream<charT, traits>& os, const year_month_weekday_last& ymwdl); 601 602// 25.8.18, civil calendar conventional syntax operators // C++20 603constexpr year_month 604 operator/(const year& y, const month& m) noexcept; 605constexpr year_month 606 operator/(const year& y, int m) noexcept; 607constexpr month_day 608 operator/(const month& m, const day& d) noexcept; 609constexpr month_day 610 operator/(const month& m, int d) noexcept; 611constexpr month_day 612 operator/(int m, const day& d) noexcept; 613constexpr month_day 614 operator/(const day& d, const month& m) noexcept; 615constexpr month_day 616 operator/(const day& d, int m) noexcept; 617constexpr month_day_last 618 operator/(const month& m, last_spec) noexcept; 619constexpr month_day_last 620 operator/(int m, last_spec) noexcept; 621constexpr month_day_last 622 operator/(last_spec, const month& m) noexcept; 623constexpr month_day_last 624 operator/(last_spec, int m) noexcept; 625constexpr month_weekday 626 operator/(const month& m, const weekday_indexed& wdi) noexcept; 627constexpr month_weekday 628 operator/(int m, const weekday_indexed& wdi) noexcept; 629constexpr month_weekday 630 operator/(const weekday_indexed& wdi, const month& m) noexcept; 631constexpr month_weekday 632 operator/(const weekday_indexed& wdi, int m) noexcept; 633constexpr month_weekday_last 634 operator/(const month& m, const weekday_last& wdl) noexcept; 635constexpr month_weekday_last 636 operator/(int m, const weekday_last& wdl) noexcept; 637constexpr month_weekday_last 638 operator/(const weekday_last& wdl, const month& m) noexcept; 639constexpr month_weekday_last 640 operator/(const weekday_last& wdl, int m) noexcept; 641constexpr year_month_day 642 operator/(const year_month& ym, const day& d) noexcept; 643constexpr year_month_day 644 operator/(const year_month& ym, int d) noexcept; 645constexpr year_month_day 646 operator/(const year& y, const month_day& md) noexcept; 647constexpr year_month_day 648 operator/(int y, const month_day& md) noexcept; 649constexpr year_month_day 650 operator/(const month_day& md, const year& y) noexcept; 651constexpr year_month_day 652 operator/(const month_day& md, int y) noexcept; 653constexpr year_month_day_last 654 operator/(const year_month& ym, last_spec) noexcept; 655constexpr year_month_day_last 656 operator/(const year& y, const month_day_last& mdl) noexcept; 657constexpr year_month_day_last 658 operator/(int y, const month_day_last& mdl) noexcept; 659constexpr year_month_day_last 660 operator/(const month_day_last& mdl, const year& y) noexcept; 661constexpr year_month_day_last 662 operator/(const month_day_last& mdl, int y) noexcept; 663constexpr year_month_weekday 664 operator/(const year_month& ym, const weekday_indexed& wdi) noexcept; 665constexpr year_month_weekday 666 operator/(const year& y, const month_weekday& mwd) noexcept; 667constexpr year_month_weekday 668 operator/(int y, const month_weekday& mwd) noexcept; 669constexpr year_month_weekday 670 operator/(const month_weekday& mwd, const year& y) noexcept; 671constexpr year_month_weekday 672 operator/(const month_weekday& mwd, int y) noexcept; 673constexpr year_month_weekday_last 674 operator/(const year_month& ym, const weekday_last& wdl) noexcept; 675constexpr year_month_weekday_last 676 operator/(const year& y, const month_weekday_last& mwdl) noexcept; 677constexpr year_month_weekday_last 678 operator/(int y, const month_weekday_last& mwdl) noexcept; 679constexpr year_month_weekday_last 680 operator/(const month_weekday_last& mwdl, const year& y) noexcept; 681constexpr year_month_weekday_last 682 operator/(const month_weekday_last& mwdl, int y) noexcept; 683 684// 26.9, class template hh_mm_ss 685template <class Duration> 686class hh_mm_ss 687{ 688 bool is_neg; // exposition only 689 chrono::hours h; // exposition only 690 chrono::minutes m; // exposition only 691 chrono::seconds s; // exposition only 692 precision ss; // exposition only 693 694public: 695 static unsigned constexpr fractional_width = see below; 696 using precision = see below; 697 698 constexpr hh_mm_ss() noexcept : hh_mm_ss{Duration::zero()} {} 699 constexpr explicit hh_mm_ss(Duration d) noexcept; 700 701 constexpr bool is_negative() const noexcept; 702 constexpr chrono::hours hours() const noexcept; 703 constexpr chrono::minutes minutes() const noexcept; 704 constexpr chrono::seconds seconds() const noexcept; 705 constexpr precision subseconds() const noexcept; 706 707 constexpr explicit operator precision() const noexcept; 708 constexpr precision to_duration() const noexcept; 709}; 710 711template<class charT, class traits, class Duration> 712 basic_ostream<charT, traits>& 713 operator<<(basic_ostream<charT, traits>& os, const hh_mm_ss<Duration>& hms); // C++20 714 715// 26.10, 12/24 hour functions 716constexpr bool is_am(hours const& h) noexcept; 717constexpr bool is_pm(hours const& h) noexcept; 718constexpr hours make12(const hours& h) noexcept; 719constexpr hours make24(const hours& h, bool is_pm) noexcept; 720 721// [time.zone.db], time zone database 722struct tzdb { // C++20 723 string version; 724 vector<time_zone> zones; 725 vector<time_zone_link> links; 726 vector<leap_second> leap_seconds; 727 728 const time_zone* locate_zone(string_view tz_name) const; 729 const time_zone* current_zone() const; 730}; 731 732class tzdb_list { // C++20 733public: 734 tzdb_list(const tzdb_list&) = delete; 735 tzdb_list& operator=(const tzdb_list&) = delete; 736 737 // unspecified additional constructors 738 739 class const_iterator; 740 741 const tzdb& front() const noexcept; 742 743 const_iterator erase_after(const_iterator p); 744 745 const_iterator begin() const noexcept; 746 const_iterator end() const noexcept; 747 748 const_iterator cbegin() const noexcept; 749 const_iterator cend() const noexcept; 750}; 751 752// [time.zone.db.access], time zone database access 753const tzdb& get_tzdb(); // C++20 754tzdb_list& get_tzdb_list(); // C++20 755const time_zone* locate_zone(string_view tz_name); // C++20 756const time_zone* current_zone() // C++20 757 758// [time.zone.db.remote], remote time zone database support 759const tzdb& reload_tzdb(); // C++20 760string remote_version(); // C++20 761 762// [time.zone.exception], exception classes 763class nonexistent_local_time; // C++20 764class ambiguous_local_time; // C++20 765 766// [time.zone.info], information classes 767struct sys_info { // C++20 768 sys_seconds begin; 769 sys_seconds end; 770 seconds offset; 771 minutes save; 772 string abbrev; 773}; 774 775template<class charT, class traits> // C++20 776 basic_ostream<charT, traits>& 777 operator<<(basic_ostream<charT, traits>& os, const sys_info& si); 778 779struct local_info { // C++20 780 static constexpr int unique = 0; 781 static constexpr int nonexistent = 1; 782 static constexpr int ambiguous = 2; 783 784 int result; 785 sys_info first; 786 sys_info second; 787}; 788 789template<class charT, class traits> // C++20 790 basic_ostream<charT, traits>& 791 operator<<(basic_ostream<charT, traits>& os, const local_info& li); 792 793// 25.10.5, class time_zone // C++20 794enum class choose {earliest, latest}; 795class time_zone { 796 time_zone(time_zone&&) = default; 797 time_zone& operator=(time_zone&&) = default; 798 799 // unspecified additional constructors 800 801 string_view name() const noexcept; 802 803 template<class Duration> 804 sys_info get_info(const sys_time<Duration>& st) const; 805 806 template<class Duration> 807 local_info get_info(const local_time<Duration>& tp) const; 808 809 template<class Duration> 810 sys_time<common_type_t<Duration, seconds>> 811 to_sys(const local_time<Duration>& tp) const; 812 813 template<class Duration> 814 sys_time<common_type_t<Duration, seconds>> 815 to_sys(const local_time<Duration>& tp, choose z) const; 816 817 template<class Duration> 818 local_time<common_type_t<Duration, seconds>> 819 to_local(const sys_time<Duration>& tp) const; 820}; 821bool operator==(const time_zone& x, const time_zone& y) noexcept; // C++20 822strong_ordering operator<=>(const time_zone& x, const time_zone& y) noexcept; // C++20 823 824// [time.zone.zonedtraits], class template zoned_traits 825template<class T> struct zoned_traits; // C++20 826 827// [time.zone.zonedtime], class template zoned_time 828template<class Duration, class TimeZonePtr = const time_zone*> // C++20 829class zoned_time; 830 831using zoned_seconds = zoned_time<seconds>; // C++20 832 833template<class Duration1, class Duration2, class TimeZonePtr> // C++20 834 bool operator==(const zoned_time<Duration1, TimeZonePtr>& x, 835 const zoned_time<Duration2, TimeZonePtr>& y); 836 837template<class charT, class traits, class Duration, class TimeZonePtr> // C++20 838 basic_ostream<charT, traits>& 839 operator<<(basic_ostream<charT, traits>& os, 840 const zoned_time<Duration, TimeZonePtr>& t); 841 842// [time.zone.leap], leap second support 843class leap_second { // C++20 844public: 845 leap_second(const leap_second&) = default; 846 leap_second& operator=(const leap_second&) = default; 847 848 // unspecified additional constructors 849 850 constexpr sys_seconds date() const noexcept; 851 constexpr seconds value() const noexcept; 852}; 853 854constexpr bool operator==(const leap_second& x, const leap_second& y); // C++20 855constexpr strong_ordering operator<=>(const leap_second& x, const leap_second& y); 856 857template<class Duration> // C++20 858 constexpr bool operator==(const leap_second& x, const sys_time<Duration>& y); 859template<class Duration> // C++20 860 constexpr bool operator< (const leap_second& x, const sys_time<Duration>& y); 861template<class Duration> // C++20 862 constexpr bool operator< (const sys_time<Duration>& x, const leap_second& y); 863template<class Duration> // C++20 864 constexpr bool operator> (const leap_second& x, const sys_time<Duration>& y); 865template<class Duration> // C++20 866 constexpr bool operator> (const sys_time<Duration>& x, const leap_second& y); 867template<class Duration> // C++20 868 constexpr bool operator<=(const leap_second& x, const sys_time<Duration>& y); 869template<class Duration> // C++20 870 constexpr bool operator<=(const sys_time<Duration>& x, const leap_second& y); 871template<class Duration> // C++20 872 constexpr bool operator>=(const leap_second& x, const sys_time<Duration>& y); 873template<class Duration> // C++20 874 constexpr bool operator>=(const sys_time<Duration>& x, const leap_second& y); 875template<class Duration> // C++20 876 requires three_way_comparable_with<sys_seconds, sys_time<Duration>> 877 constexpr auto operator<=>(const leap_second& x, const sys_time<Duration>& y); 878 879// [time.zone.link], class time_zone_link 880class time_zone_link { // C++20 881public: 882 time_zone_link(time_zone_link&&) = default; 883 time_zone_link& operator=(time_zone_link&&) = default; 884 885 // unspecified additional constructors 886 887 string_view name() const noexcept; 888 string_view target() const noexcept; 889}; 890 891bool operator==(const time_zone_link& x, const time_zone_link& y); // C++20 892strong_ordering operator<=>(const time_zone_link& x, const time_zone_link& y); // C++20 893 894} // chrono 895 896namespace std { 897 template<class Duration, class charT> 898 struct formatter<chrono::sys_time<Duration>, charT>; // C++20 899 template<class Duration, class charT> 900 struct formatter<chrono::utc_time<Duration>, charT>; // C++20 901 template<class Duration, class charT> 902 struct formatter<chrono::filetime<Duration>, charT>; // C++20 903 template<class Duration, class charT> 904 struct formatter<chrono::local_time<Duration>, charT>; // C++20 905 template<class Rep, class Period, class charT> 906 struct formatter<chrono::duration<Rep, Period>, charT>; // C++20 907 template<class charT> struct formatter<chrono::day, charT>; // C++20 908 template<class charT> struct formatter<chrono::month, charT>; // C++20 909 template<class charT> struct formatter<chrono::year, charT>; // C++20 910 template<class charT> struct formatter<chrono::weekday, charT>; // C++20 911 template<class charT> struct formatter<chrono::weekday_indexed, charT>; // C++20 912 template<class charT> struct formatter<chrono::weekday_last, charT>; // C++20 913 template<class charT> struct formatter<chrono::month_day, charT>; // C++20 914 template<class charT> struct formatter<chrono::month_day_last, charT>; // C++20 915 template<class charT> struct formatter<chrono::month_weekday, charT>; // C++20 916 template<class charT> struct formatter<chrono::month_weekday_last, charT>; // C++20 917 template<class charT> struct formatter<chrono::year_month, charT>; // C++20 918 template<class charT> struct formatter<chrono::year_month_day, charT>; // C++20 919 template<class charT> struct formatter<chrono::year_month_day_last, charT>; // C++20 920 template<class charT> struct formatter<chrono::year_month_weekday, charT>; // C++20 921 template<class charT> struct formatter<chrono::year_month_weekday_last, charT>; // C++20 922 template<class Rep, class Period, class charT> 923 struct formatter<chrono::hh_mm_ss<duration<Rep, Period>>, charT>; // C++20 924 template<class charT> struct formatter<chrono::sys_info, charT>; // C++20 925 template<class charT> struct formatter<chrono::local_info, charT>; // C++20 926 template<class Duration, class TimeZonePtr, class charT> // C++20 927 struct formatter<chrono::zoned_time<Duration, TimeZonePtr>, charT>; 928} // namespace std 929 930namespace chrono { 931// calendrical constants 932inline constexpr last_spec last{}; // C++20 933inline constexpr chrono::weekday Sunday{0}; // C++20 934inline constexpr chrono::weekday Monday{1}; // C++20 935inline constexpr chrono::weekday Tuesday{2}; // C++20 936inline constexpr chrono::weekday Wednesday{3}; // C++20 937inline constexpr chrono::weekday Thursday{4}; // C++20 938inline constexpr chrono::weekday Friday{5}; // C++20 939inline constexpr chrono::weekday Saturday{6}; // C++20 940 941inline constexpr chrono::month January{1}; // C++20 942inline constexpr chrono::month February{2}; // C++20 943inline constexpr chrono::month March{3}; // C++20 944inline constexpr chrono::month April{4}; // C++20 945inline constexpr chrono::month May{5}; // C++20 946inline constexpr chrono::month June{6}; // C++20 947inline constexpr chrono::month July{7}; // C++20 948inline constexpr chrono::month August{8}; // C++20 949inline constexpr chrono::month September{9}; // C++20 950inline constexpr chrono::month October{10}; // C++20 951inline constexpr chrono::month November{11}; // C++20 952inline constexpr chrono::month December{12}; // C++20 953} // chrono 954 955inline namespace literals { 956 inline namespace chrono_literals { 957constexpr chrono::hours operator ""h(unsigned long long); // C++14 958constexpr chrono::duration<unspecified , ratio<3600,1>> operator ""h(long double); // C++14 959constexpr chrono::minutes operator ""min(unsigned long long); // C++14 960constexpr chrono::duration<unspecified , ratio<60,1>> operator ""min(long double); // C++14 961constexpr chrono::seconds operator ""s(unsigned long long); // C++14 962constexpr chrono::duration<unspecified > operator ""s(long double); // C++14 963constexpr chrono::milliseconds operator ""ms(unsigned long long); // C++14 964constexpr chrono::duration<unspecified , milli> operator ""ms(long double); // C++14 965constexpr chrono::microseconds operator ""us(unsigned long long); // C++14 966constexpr chrono::duration<unspecified , micro> operator ""us(long double); // C++14 967constexpr chrono::nanoseconds operator ""ns(unsigned long long); // C++14 968constexpr chrono::duration<unspecified , nano> operator ""ns(long double); // C++14 969constexpr chrono::day operator ""d(unsigned long long d) noexcept; // C++20 970constexpr chrono::year operator ""y(unsigned long long y) noexcept; // C++20 971} // chrono_literals 972} // literals 973 974} // std 975*/ 976 977// clang-format on 978 979#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS) 980# include <__cxx03/chrono> 981#else 982# include <__config> 983 984# include <__chrono/duration.h> 985# include <__chrono/file_clock.h> 986# include <__chrono/high_resolution_clock.h> 987# include <__chrono/steady_clock.h> 988# include <__chrono/system_clock.h> 989# include <__chrono/time_point.h> 990 991# if _LIBCPP_STD_VER >= 20 992# include <__chrono/calendar.h> 993# include <__chrono/day.h> 994# include <__chrono/exception.h> 995# include <__chrono/hh_mm_ss.h> 996# include <__chrono/literals.h> 997# include <__chrono/local_info.h> 998# include <__chrono/month.h> 999# include <__chrono/month_weekday.h> 1000# include <__chrono/monthday.h> 1001# include <__chrono/sys_info.h> 1002# include <__chrono/weekday.h> 1003# include <__chrono/year.h> 1004# include <__chrono/year_month.h> 1005# include <__chrono/year_month_day.h> 1006# include <__chrono/year_month_weekday.h> 1007 1008# if _LIBCPP_HAS_LOCALIZATION 1009# include <__chrono/formatter.h> 1010# include <__chrono/ostream.h> 1011# include <__chrono/parser_std_format_spec.h> 1012# include <__chrono/statically_widen.h> 1013# endif 1014 1015# if _LIBCPP_HAS_TIME_ZONE_DATABASE && _LIBCPP_HAS_FILESYSTEM && _LIBCPP_HAS_LOCALIZATION 1016# include <__chrono/leap_second.h> 1017# include <__chrono/time_zone.h> 1018# include <__chrono/time_zone_link.h> 1019# include <__chrono/tzdb.h> 1020# include <__chrono/tzdb_list.h> 1021# include <__chrono/utc_clock.h> 1022# include <__chrono/zoned_time.h> 1023# endif 1024 1025# endif 1026 1027# include <version> 1028 1029// standard-mandated includes 1030 1031// [time.syn] 1032# include <compare> 1033 1034# if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 1035# pragma GCC system_header 1036# endif 1037 1038# if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 17 1039# include <cstdint> 1040# include <stdexcept> 1041# include <string_view> 1042# endif 1043 1044# if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20 1045# include <bit> 1046# include <concepts> 1047# include <cstring> 1048# include <forward_list> 1049# include <string> 1050# include <tuple> 1051# include <vector> 1052# endif 1053 1054# if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER == 20 1055# include <charconv> 1056# if _LIBCPP_HAS_LOCALIZATION 1057# include <locale> 1058# include <ostream> 1059# endif 1060# endif 1061#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS) 1062 1063#endif // _LIBCPP_CHRONO 1064