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 constexpr time_point& operator++(); // C++20
136 constexpr time_point operator++(int); // C++20
137 constexpr time_point& operator--(); // C++20
138 constexpr time_point operator--(int); // C++20
139
140 time_point& operator+=(const duration& d); // constexpr in C++17
141 time_point& operator-=(const duration& d); // constexpr in C++17
142
143 // special values
144
145 static constexpr time_point min(); // noexcept in C++20
146 static constexpr time_point max(); // noexcept in C++20
147};
148
149} // chrono
150
151// common_type traits
152template <class Rep1, class Period1, class Rep2, class Period2>
153 struct common_type<chrono::duration<Rep1, Period1>, chrono::duration<Rep2, Period2>>;
154
155template <class Clock, class Duration1, class Duration2>
156 struct common_type<chrono::time_point<Clock, Duration1>, chrono::time_point<Clock, Duration2>>;
157
158namespace chrono {
159
160// duration arithmetic
161template <class Rep1, class Period1, class Rep2, class Period2>
162 constexpr
163 typename common_type<duration<Rep1, Period1>, duration<Rep2, Period2>>::type
164 operator+(const duration<Rep1, Period1>& lhs, const duration<Rep2, Period2>& rhs);
165template <class Rep1, class Period1, class Rep2, class Period2>
166 constexpr
167 typename common_type<duration<Rep1, Period1>, duration<Rep2, Period2>>::type
168 operator-(const duration<Rep1, Period1>& lhs, const duration<Rep2, Period2>& rhs);
169template <class Rep1, class Period, class Rep2>
170 constexpr
171 duration<typename common_type<Rep1, Rep2>::type, Period>
172 operator*(const duration<Rep1, Period>& d, const Rep2& s);
173template <class Rep1, class Period, class Rep2>
174 constexpr
175 duration<typename common_type<Rep1, Rep2>::type, Period>
176 operator*(const Rep1& s, const duration<Rep2, Period>& d);
177template <class Rep1, class Period, class Rep2>
178 constexpr
179 duration<typename common_type<Rep1, Rep2>::type, Period>
180 operator/(const duration<Rep1, Period>& d, const Rep2& s);
181template <class Rep1, class Period1, class Rep2, class Period2>
182 constexpr
183 typename common_type<Rep1, Rep2>::type
184 operator/(const duration<Rep1, Period1>& lhs, const duration<Rep2, Period2>& rhs);
185
186// duration comparisons
187template <class Rep1, class Period1, class Rep2, class Period2>
188 constexpr
189 bool operator==(const duration<Rep1, Period1>& lhs, const duration<Rep2, Period2>& rhs);
190template <class Rep1, class Period1, class Rep2, class Period2>
191 constexpr
192 bool operator!=(const duration<Rep1, Period1>& lhs, const duration<Rep2, Period2>& rhs); // removed in C++20
193template <class Rep1, class Period1, class Rep2, class Period2>
194 constexpr
195 bool operator< (const duration<Rep1, Period1>& lhs, const duration<Rep2, Period2>& rhs);
196template <class Rep1, class Period1, class Rep2, class Period2>
197 constexpr
198 bool operator<=(const duration<Rep1, Period1>& lhs, const duration<Rep2, Period2>& rhs);
199template <class Rep1, class Period1, class Rep2, class Period2>
200 constexpr
201 bool operator> (const duration<Rep1, Period1>& lhs, const duration<Rep2, Period2>& rhs);
202template <class Rep1, class Period1, class Rep2, class Period2>
203 constexpr
204 bool operator>=(const duration<Rep1, Period1>& lhs, const duration<Rep2, Period2>& rhs);
205template<class Rep1, class Period1, class Rep2, class Period2>
206 requires three_way_comparable<typename CT::rep>
207 constexpr auto operator<=>(const duration<Rep1, Period1>& lhs,
208 const duration<Rep2, Period2>& rhs); // since C++20
209
210// duration_cast
211template <class ToDuration, class Rep, class Period>
212 ToDuration duration_cast(const duration<Rep, Period>& d);
213
214template <class ToDuration, class Rep, class Period>
215 constexpr ToDuration floor(const duration<Rep, Period>& d); // C++17
216template <class ToDuration, class Rep, class Period>
217 constexpr ToDuration ceil(const duration<Rep, Period>& d); // C++17
218template <class ToDuration, class Rep, class Period>
219 constexpr ToDuration round(const duration<Rep, Period>& d); // C++17
220
221// duration I/O
222template<class charT, class traits, class Rep, class Period> // C++20
223 basic_ostream<charT, traits>&
224 operator<<(basic_ostream<charT, traits>& os,
225 const duration<Rep, Period>& d);
226
227// time_point arithmetic (all constexpr in C++14)
228template <class Clock, class Duration1, class Rep2, class Period2>
229 time_point<Clock, typename common_type<Duration1, duration<Rep2, Period2>>::type>
230 operator+(const time_point<Clock, Duration1>& lhs, const duration<Rep2, Period2>& rhs);
231template <class Rep1, class Period1, class Clock, class Duration2>
232 time_point<Clock, typename common_type<duration<Rep1, Period1>, Duration2>::type>
233 operator+(const duration<Rep1, Period1>& lhs, const time_point<Clock, Duration2>& rhs);
234template <class Clock, class Duration1, class Rep2, class Period2>
235 time_point<Clock, typename common_type<Duration1, duration<Rep2, Period2>>::type>
236 operator-(const time_point<Clock, Duration1>& lhs, const duration<Rep2, Period2>& rhs);
237template <class Clock, class Duration1, class Duration2>
238 typename common_type<Duration1, Duration2>::type
239 operator-(const time_point<Clock, Duration1>& lhs, const time_point<Clock, Duration2>& rhs);
240
241// time_point comparisons (all constexpr in C++14)
242template <class Clock, class Duration1, class Duration2>
243 bool operator==(const time_point<Clock, Duration1>& lhs, const time_point<Clock, Duration2>& rhs);
244template <class Clock, class Duration1, class Duration2>
245 bool operator!=(const time_point<Clock, Duration1>& lhs, const time_point<Clock, Duration2>& rhs); // removed in C++20
246template <class Clock, class Duration1, class Duration2>
247 bool operator< (const time_point<Clock, Duration1>& lhs, const time_point<Clock, Duration2>& rhs);
248template <class Clock, class Duration1, class Duration2>
249 bool operator<=(const time_point<Clock, Duration1>& lhs, const time_point<Clock, Duration2>& rhs);
250template <class Clock, class Duration1, class Duration2>
251 bool operator> (const time_point<Clock, Duration1>& lhs, const time_point<Clock, Duration2>& rhs);
252template <class Clock, class Duration1, class Duration2>
253 bool operator>=(const time_point<Clock, Duration1>& lhs, const time_point<Clock, Duration2>& rhs);
254template<class Clock, class Duration1,
255 three_way_comparable_with<Duration1> Duration2>
256 constexpr auto operator<=>(const time_point<Clock, Duration1>& lhs,
257 const time_point<Clock, Duration2>& rhs); // since C++20
258
259// time_point_cast (constexpr in C++14)
260
261template <class ToDuration, class Clock, class Duration>
262 time_point<Clock, ToDuration> time_point_cast(const time_point<Clock, Duration>& t);
263
264template <class ToDuration, class Clock, class Duration>
265 constexpr time_point<Clock, ToDuration>
266 floor(const time_point<Clock, Duration>& tp); // C++17
267
268template <class ToDuration, class Clock, class Duration>
269 constexpr time_point<Clock, ToDuration>
270 ceil(const time_point<Clock, Duration>& tp); // C++17
271
272template <class ToDuration, class Clock, class Duration>
273 constexpr time_point<Clock, ToDuration>
274 round(const time_point<Clock, Duration>& tp); // C++17
275
276template <class Rep, class Period>
277 constexpr duration<Rep, Period> abs(duration<Rep, Period> d); // C++17
278
279// Clocks
280
281class system_clock
282{
283public:
284 typedef microseconds duration;
285 typedef duration::rep rep;
286 typedef duration::period period;
287 typedef chrono::time_point<system_clock> time_point;
288 static const bool is_steady = false; // constexpr in C++14
289
290 static time_point now() noexcept;
291 static time_t to_time_t (const time_point& __t) noexcept;
292 static time_point from_time_t(time_t __t) noexcept;
293};
294
295template <class Duration>
296 using sys_time = time_point<system_clock, Duration>; // C++20
297using sys_seconds = sys_time<seconds>; // C++20
298using sys_days = sys_time<days>; // C++20
299
300template<class charT, class traits, class Duration> // C++20
301 basic_ostream<charT, traits>&
302 operator<<(basic_ostream<charT, traits>& os, const sys_time<Duration>& tp);
303
304template<class charT, class traits> // C++20
305 basic_ostream<charT, traits>&
306 operator<<(basic_ostream<charT, traits>& os, const sys_days& dp);
307
308// [time.clock.utc], class utc_clock
309class utc_clock { // C++20
310public:
311 using rep = a signed arithmetic type;
312 using period = ratio<unspecified, unspecified>;
313 using duration = chrono::duration<rep, period>;
314 using time_point = chrono::time_point<utc_clock>;
315 static constexpr bool is_steady = unspecified;
316
317 static time_point now();
318
319 template<class Duration>
320 static sys_time<common_type_t<Duration, seconds>>
321 to_sys(const utc_time<Duration>& t);
322 template<class Duration>
323 static utc_time<common_type_t<Duration, seconds>>
324 from_sys(const sys_time<Duration>& t);
325};
326
327template<class Duration>
328using utc_time = time_point<utc_clock, Duration>; // C++20
329using utc_seconds = utc_time<seconds>; // C++20
330
331template<class charT, class traits, class Duration> // C++20
332 basic_ostream<charT, traits>&
333 operator<<(basic_ostream<charT, traits>& os, const utc_time<Duration>& t);
334
335struct leap_second_info { // C++20
336 bool is_leap_second;
337 seconds elapsed;
338};
339
340template<class Duration> // C++20
341 leap_second_info get_leap_second_info(const utc_time<Duration>& ut);
342
343
344// [time.clock.tai], class tai_clock
345class tai_clock { // C++20
346public:
347 using rep = a signed arithmetic type;
348 using period = ratio<unspecified, unspecified>;
349 using duration = chrono::duration<rep, period>;
350 using time_point = chrono::time_point<tai_clock>;
351 static constexpr bool is_steady = unspecified;
352
353 static time_point now();
354
355 template<class Duration>
356 static utc_time<common_type_t<Duration, seconds>>
357 to_utc(const tai_time<Duration>& t);
358 template<class Duration>
359 static tai_time<common_type_t<Duration, seconds>>
360 from_utc(const utc_time<Duration>& t);
361};
362
363template<class Duration>
364using tai_time = time_point<tai_clock, Duration>; // C++20
365using tai_seconds = tai_time<seconds>; // C++20
366
367template<class charT, class traits, class Duration> // C++20
368 basic_ostream<charT, traits>&
369 operator<<(basic_ostream<charT, traits>& os, const tai_time<Duration>& t);
370
371// [time.clock.gps], class gps_clock
372class gps_clock { // C++20
373public:
374 using rep = a signed arithmetic type;
375 using period = ratio<unspecified, unspecified>;
376 using duration = chrono::duration<rep, period>;
377 using time_point = chrono::time_point<gps_clock>;
378 static constexpr bool is_steady = unspecified;
379
380 static time_point now();
381
382 template<class Duration>
383 static utc_time<common_type_t<Duration, seconds>>
384 to_utc(const gps_time<Duration>& t);
385 template<class Duration>
386 static gps_time<common_type_t<Duration, seconds>>
387 from_utc(const utc_time<Duration>& t);
388};
389
390template<class Duration>
391using gps_time = time_point<gps_clock, Duration>; // C++20
392using gps_seconds = gps_time<seconds>; // C++20
393
394template<class charT, class traits, class Duration> // C++20
395 basic_ostream<charT, traits>&
396 operator<<(basic_ostream<charT, traits>& os, const gps_time<Duration>& t);
397
398class file_clock // C++20
399{
400public:
401 typedef see-below rep;
402 typedef nano period;
403 typedef chrono::duration<rep, period> duration;
404 typedef chrono::time_point<file_clock> time_point;
405 static constexpr bool is_steady = false;
406
407 static time_point now() noexcept;
408
409 template<class Duration>
410 static sys_time<see-below> to_sys(const file_time<Duration>&);
411
412 template<class Duration>
413 static file_time<see-below> from_sys(const sys_time<Duration>&);
414};
415
416template<class Duration>
417 using file_time = time_point<file_clock, Duration>; // C++20
418
419template<class charT, class traits, class Duration> // C++20
420 basic_ostream<charT, traits>&
421 operator<<(basic_ostream<charT, traits>& os, const file_time<Duration>& tp);
422
423class steady_clock
424{
425public:
426 typedef nanoseconds duration;
427 typedef duration::rep rep;
428 typedef duration::period period;
429 typedef chrono::time_point<steady_clock, duration> time_point;
430 static const bool is_steady = true; // constexpr in C++14
431
432 static time_point now() noexcept;
433};
434
435typedef steady_clock high_resolution_clock;
436
437// [time.clock.local] local time // C++20
438struct local_t {};
439template<class Duration>
440 using local_time = time_point<local_t, Duration>;
441using local_seconds = local_time<seconds>;
442using local_days = local_time<days>;
443
444template<class charT, class traits, class Duration> // C++20
445 basic_ostream<charT, traits>&
446 operator<<(basic_ostream<charT, traits>& os, const local_time<Duration>& tp);
447
448// [time.cal.last] class last_spec // C++20
449struct last_spec;
450
451// [time.cal.day] class day // C++20
452
453class day;
454constexpr bool operator==(const day& x, const day& y) noexcept;
455constexpr strong_ordering operator<=>(const day& x, const day& y) noexcept;
456constexpr day operator+(const day& x, const days& y) noexcept;
457constexpr day operator+(const days& x, const day& y) noexcept;
458constexpr day operator-(const day& x, const days& y) noexcept;
459constexpr days operator-(const day& x, const day& y) noexcept;
460template<class charT, class traits>
461 basic_ostream<charT, traits>&
462 operator<<(basic_ostream<charT, traits>& os, const day& d);
463
464// [time.cal.month] class month // C++20
465class month;
466constexpr bool operator==(const month& x, const month& y) noexcept;
467constexpr strong_ordering operator<=>(const month& x, const month& y) noexcept;
468
469constexpr month operator+(const month& x, const months& y) noexcept;
470constexpr month operator+(const months& x, const month& y) noexcept;
471constexpr month operator-(const month& x, const months& y) noexcept;
472constexpr months operator-(const month& x, const month& y) noexcept;
473template<class charT, class traits>
474 basic_ostream<charT, traits>&
475 operator<<(basic_ostream<charT, traits>& os, const month& m);
476
477// [time.cal.year] class year // C++20
478class year;
479constexpr bool operator==(const year& x, const year& y) noexcept;
480constexpr strong_ordering operator<=>(const year& x, const year& y) noexcept;
481
482constexpr year operator+(const year& x, const years& y) noexcept;
483constexpr year operator+(const years& x, const year& y) noexcept;
484constexpr year operator-(const year& x, const years& y) noexcept;
485constexpr years operator-(const year& x, const year& y) noexcept;
486template<class charT, class traits>
487 basic_ostream<charT, traits>&
488 operator<<(basic_ostream<charT, traits>& os, const year& y);
489
490// [time.cal.wd] class weekday // C++20
491class weekday;
492
493constexpr bool operator==(const weekday& x, const weekday& y) noexcept;
494constexpr weekday operator+(const weekday& x, const days& y) noexcept;
495constexpr weekday operator+(const days& x, const weekday& y) noexcept;
496constexpr weekday operator-(const weekday& x, const days& y) noexcept;
497constexpr days operator-(const weekday& x, const weekday& y) noexcept;
498template<class charT, class traits>
499 basic_ostream<charT, traits>&
500 operator<<(basic_ostream<charT, traits>& os, const weekday& wd);
501
502// [time.cal.wdidx] class weekday_indexed // C++20
503
504class weekday_indexed;
505constexpr bool operator==(const weekday_indexed& x, const weekday_indexed& y) noexcept;
506
507template<class charT, class traits>
508 basic_ostream<charT, traits>&
509 operator<<(basic_ostream<charT, traits>& os, const weekday_indexed& wdi);
510
511// [time.cal.wdlast] class weekday_last // C++20
512class weekday_last;
513
514constexpr bool operator==(const weekday_last& x, const weekday_last& y) noexcept;
515
516template<class charT, class traits>
517 basic_ostream<charT, traits>&
518 operator<<(basic_ostream<charT, traits>& os, const weekday_last& wdl);
519
520// [time.cal.md] class month_day // C++20
521class month_day;
522
523constexpr bool operator==(const month_day& x, const month_day& y) noexcept;
524constexpr strong_ordering operator<=>(const month_day& x, const month_day& y) noexcept;
525
526template<class charT, class traits>
527 basic_ostream<charT, traits>&
528 operator<<(basic_ostream<charT, traits>& os, const month_day& md);
529
530// [time.cal.mdlast] class month_day_last // C++20
531class month_day_last;
532
533constexpr bool operator==(const month_day_last& x, const month_day_last& y) noexcept;
534constexpr strong_ordering operator<=>(const month_day_last& x, const month_day_last& y) noexcept;
535
536template<class charT, class traits>
537 basic_ostream<charT, traits>&
538 operator<<(basic_ostream<charT, traits>& os, const month_day_last& mdl);
539
540// [time.cal.mwd] class month_weekday // C++20
541class month_weekday;
542
543constexpr bool operator==(const month_weekday& x, const month_weekday& y) noexcept;
544
545template<class charT, class traits>
546 basic_ostream<charT, traits>&
547 operator<<(basic_ostream<charT, traits>& os, const month_weekday& mwd);
548
549// [time.cal.mwdlast] class month_weekday_last // C++20
550class month_weekday_last;
551
552constexpr bool operator==(const month_weekday_last& x, const month_weekday_last& y) noexcept;
553
554template<class charT, class traits>
555 basic_ostream<charT, traits>&
556 operator<<(basic_ostream<charT, traits>& os, const month_weekday_last& mwdl);
557
558
559// [time.cal.ym] class year_month // C++20
560class year_month;
561
562constexpr bool operator==(const year_month& x, const year_month& y) noexcept;
563constexpr strong_ordering operator<=>(const year_month& x, const year_month& y) noexcept;
564
565constexpr year_month operator+(const year_month& ym, const months& dm) noexcept;
566constexpr year_month operator+(const months& dm, const year_month& ym) noexcept;
567constexpr year_month operator-(const year_month& ym, const months& dm) noexcept;
568constexpr months operator-(const year_month& x, const year_month& y) noexcept;
569constexpr year_month operator+(const year_month& ym, const years& dy) noexcept;
570constexpr year_month operator+(const years& dy, const year_month& ym) noexcept;
571constexpr year_month operator-(const year_month& ym, const years& dy) noexcept;
572
573template<class charT, class traits>
574 basic_ostream<charT, traits>&
575 operator<<(basic_ostream<charT, traits>& os, const year_month& ym);
576
577// [time.cal.ymd] class year_month_day class // C++20
578year_month_day;
579
580constexpr bool operator==(const year_month_day& x, const year_month_day& y) noexcept;
581constexpr strong_ordering operator<=>(const year_month_day& x, const year_month_day& y) noexcept;
582
583constexpr year_month_day operator+(const year_month_day& ymd, const months& dm) noexcept;
584constexpr year_month_day operator+(const months& dm, const year_month_day& ymd) noexcept;
585constexpr year_month_day operator+(const year_month_day& ymd, const years& dy) noexcept;
586constexpr year_month_day operator+(const years& dy, const year_month_day& ymd) noexcept;
587constexpr year_month_day operator-(const year_month_day& ymd, const months& dm) noexcept;
588constexpr year_month_day operator-(const year_month_day& ymd, const years& dy) noexcept;
589
590template<class charT, class traits>
591 basic_ostream<charT, traits>&
592 operator<<(basic_ostream<charT, traits>& os, const year_month_day& ymd);
593
594// [time.cal.ymdlast] class year_month_day_last // C++20
595class year_month_day_last;
596
597constexpr bool operator==(const year_month_day_last& x, const year_month_day_last& y) noexcept;
598constexpr strong_ordering operator<=>(const year_month_day_last_day& x, const year_month_day_last_day& y) noexcept;
599
600constexpr year_month_day_last
601 operator+(const year_month_day_last& ymdl, const months& dm) noexcept;
602constexpr year_month_day_last
603 operator+(const months& dm, const year_month_day_last& ymdl) noexcept;
604constexpr year_month_day_last
605 operator+(const year_month_day_last& ymdl, const years& dy) noexcept;
606constexpr year_month_day_last
607 operator+(const years& dy, const year_month_day_last& ymdl) noexcept;
608constexpr year_month_day_last
609 operator-(const year_month_day_last& ymdl, const months& dm) noexcept;
610constexpr year_month_day_last
611 operator-(const year_month_day_last& ymdl, const years& dy) noexcept;
612
613template<class charT, class traits>
614 basic_ostream<charT, traits>&
615 operator<<(basic_ostream<charT, traits>& os, const year_month_day_last& ymdl);
616
617// [time.cal.ymwd] class year_month_weekday // C++20
618class year_month_weekday;
619
620constexpr bool operator==(const year_month_weekday& x,
621 const year_month_weekday& y) noexcept;
622
623constexpr year_month_weekday
624 operator+(const year_month_weekday& ymwd, const months& dm) noexcept;
625constexpr year_month_weekday
626 operator+(const months& dm, const year_month_weekday& ymwd) noexcept;
627constexpr year_month_weekday
628 operator+(const year_month_weekday& ymwd, const years& dy) noexcept;
629constexpr year_month_weekday
630 operator+(const years& dy, const year_month_weekday& ymwd) noexcept;
631constexpr year_month_weekday
632 operator-(const year_month_weekday& ymwd, const months& dm) noexcept;
633constexpr year_month_weekday
634 operator-(const year_month_weekday& ymwd, const years& dy) noexcept;
635
636template<class charT, class traits>
637 basic_ostream<charT, traits>&
638 operator<<(basic_ostream<charT, traits>& os, const year_month_weekday& ymwd);
639
640// [time.cal.ymwdlast] class year_month_weekday_last // C++20
641class year_month_weekday_last;
642
643constexpr bool operator==(const year_month_weekday_last& x,
644 const year_month_weekday_last& y) noexcept;
645constexpr year_month_weekday_last
646 operator+(const year_month_weekday_last& ymwdl, const months& dm) noexcept;
647constexpr year_month_weekday_last
648 operator+(const months& dm, const year_month_weekday_last& ymwdl) noexcept;
649constexpr year_month_weekday_last
650 operator+(const year_month_weekday_last& ymwdl, const years& dy) noexcept;
651constexpr year_month_weekday_last
652 operator+(const years& dy, const year_month_weekday_last& ymwdl) noexcept;
653constexpr year_month_weekday_last
654 operator-(const year_month_weekday_last& ymwdl, const months& dm) noexcept;
655constexpr year_month_weekday_last
656 operator-(const year_month_weekday_last& ymwdl, const years& dy) noexcept;
657
658template<class charT, class traits>
659 basic_ostream<charT, traits>&
660 operator<<(basic_ostream<charT, traits>& os, const year_month_weekday_last& ymwdl);
661
662// [time.cal.operators] civil calendar conventional syntax operators // C++20
663constexpr year_month
664 operator/(const year& y, const month& m) noexcept;
665constexpr year_month
666 operator/(const year& y, int m) noexcept;
667constexpr month_day
668 operator/(const month& m, const day& d) noexcept;
669constexpr month_day
670 operator/(const month& m, int d) noexcept;
671constexpr month_day
672 operator/(int m, const day& d) noexcept;
673constexpr month_day
674 operator/(const day& d, const month& m) noexcept;
675constexpr month_day
676 operator/(const day& d, int m) noexcept;
677constexpr month_day_last
678 operator/(const month& m, last_spec) noexcept;
679constexpr month_day_last
680 operator/(int m, last_spec) noexcept;
681constexpr month_day_last
682 operator/(last_spec, const month& m) noexcept;
683constexpr month_day_last
684 operator/(last_spec, int m) noexcept;
685constexpr month_weekday
686 operator/(const month& m, const weekday_indexed& wdi) noexcept;
687constexpr month_weekday
688 operator/(int m, const weekday_indexed& wdi) noexcept;
689constexpr month_weekday
690 operator/(const weekday_indexed& wdi, const month& m) noexcept;
691constexpr month_weekday
692 operator/(const weekday_indexed& wdi, int m) noexcept;
693constexpr month_weekday_last
694 operator/(const month& m, const weekday_last& wdl) noexcept;
695constexpr month_weekday_last
696 operator/(int m, const weekday_last& wdl) noexcept;
697constexpr month_weekday_last
698 operator/(const weekday_last& wdl, const month& m) noexcept;
699constexpr month_weekday_last
700 operator/(const weekday_last& wdl, int m) noexcept;
701constexpr year_month_day
702 operator/(const year_month& ym, const day& d) noexcept;
703constexpr year_month_day
704 operator/(const year_month& ym, int d) noexcept;
705constexpr year_month_day
706 operator/(const year& y, const month_day& md) noexcept;
707constexpr year_month_day
708 operator/(int y, const month_day& md) noexcept;
709constexpr year_month_day
710 operator/(const month_day& md, const year& y) noexcept;
711constexpr year_month_day
712 operator/(const month_day& md, int y) noexcept;
713constexpr year_month_day_last
714 operator/(const year_month& ym, last_spec) noexcept;
715constexpr year_month_day_last
716 operator/(const year& y, const month_day_last& mdl) noexcept;
717constexpr year_month_day_last
718 operator/(int y, const month_day_last& mdl) noexcept;
719constexpr year_month_day_last
720 operator/(const month_day_last& mdl, const year& y) noexcept;
721constexpr year_month_day_last
722 operator/(const month_day_last& mdl, int y) noexcept;
723constexpr year_month_weekday
724 operator/(const year_month& ym, const weekday_indexed& wdi) noexcept;
725constexpr year_month_weekday
726 operator/(const year& y, const month_weekday& mwd) noexcept;
727constexpr year_month_weekday
728 operator/(int y, const month_weekday& mwd) noexcept;
729constexpr year_month_weekday
730 operator/(const month_weekday& mwd, const year& y) noexcept;
731constexpr year_month_weekday
732 operator/(const month_weekday& mwd, int y) noexcept;
733constexpr year_month_weekday_last
734 operator/(const year_month& ym, const weekday_last& wdl) noexcept;
735constexpr year_month_weekday_last
736 operator/(const year& y, const month_weekday_last& mwdl) noexcept;
737constexpr year_month_weekday_last
738 operator/(int y, const month_weekday_last& mwdl) noexcept;
739constexpr year_month_weekday_last
740 operator/(const month_weekday_last& mwdl, const year& y) noexcept;
741constexpr year_month_weekday_last
742 operator/(const month_weekday_last& mwdl, int y) noexcept;
743
744// 26.9, class template hh_mm_ss
745template <class Duration>
746class hh_mm_ss
747{
748 bool is_neg; // exposition only
749 chrono::hours h; // exposition only
750 chrono::minutes m; // exposition only
751 chrono::seconds s; // exposition only
752 precision ss; // exposition only
753
754public:
755 static unsigned constexpr fractional_width = see below;
756 using precision = see below;
757
758 constexpr hh_mm_ss() noexcept : hh_mm_ss{Duration::zero()} {}
759 constexpr explicit hh_mm_ss(Duration d) noexcept;
760
761 constexpr bool is_negative() const noexcept;
762 constexpr chrono::hours hours() const noexcept;
763 constexpr chrono::minutes minutes() const noexcept;
764 constexpr chrono::seconds seconds() const noexcept;
765 constexpr precision subseconds() const noexcept;
766
767 constexpr explicit operator precision() const noexcept;
768 constexpr precision to_duration() const noexcept;
769};
770
771template<class charT, class traits, class Duration>
772 basic_ostream<charT, traits>&
773 operator<<(basic_ostream<charT, traits>& os, const hh_mm_ss<Duration>& hms); // C++20
774
775// 26.10, 12/24 hour functions
776constexpr bool is_am(hours const& h) noexcept;
777constexpr bool is_pm(hours const& h) noexcept;
778constexpr hours make12(const hours& h) noexcept;
779constexpr hours make24(const hours& h, bool is_pm) noexcept;
780
781// [time.zone.db], time zone database
782struct tzdb { // C++20
783 string version;
784 vector<time_zone> zones;
785 vector<time_zone_link> links;
786 vector<leap_second> leap_seconds;
787
788 const time_zone* locate_zone(string_view tz_name) const;
789 const time_zone* current_zone() const;
790};
791
792class tzdb_list { // C++20
793public:
794 tzdb_list(const tzdb_list&) = delete;
795 tzdb_list& operator=(const tzdb_list&) = delete;
796
797 // unspecified additional constructors
798
799 class const_iterator;
800
801 const tzdb& front() const noexcept;
802
803 const_iterator erase_after(const_iterator p);
804
805 const_iterator begin() const noexcept;
806 const_iterator end() const noexcept;
807
808 const_iterator cbegin() const noexcept;
809 const_iterator cend() const noexcept;
810};
811
812// [time.zone.db.access], time zone database access
813const tzdb& get_tzdb(); // C++20
814tzdb_list& get_tzdb_list(); // C++20
815const time_zone* locate_zone(string_view tz_name); // C++20
816const time_zone* current_zone() // C++20
817
818// [time.zone.db.remote], remote time zone database support
819const tzdb& reload_tzdb(); // C++20
820string remote_version(); // C++20
821
822// [time.zone.exception], exception classes
823class nonexistent_local_time; // C++20
824class ambiguous_local_time; // C++20
825
826// [time.zone.info], information classes
827struct sys_info { // C++20
828 sys_seconds begin;
829 sys_seconds end;
830 seconds offset;
831 minutes save;
832 string abbrev;
833};
834
835template<class charT, class traits> // C++20
836 basic_ostream<charT, traits>&
837 operator<<(basic_ostream<charT, traits>& os, const sys_info& si);
838
839struct local_info { // C++20
840 static constexpr int unique = 0;
841 static constexpr int nonexistent = 1;
842 static constexpr int ambiguous = 2;
843
844 int result;
845 sys_info first;
846 sys_info second;
847};
848
849template<class charT, class traits> // C++20
850 basic_ostream<charT, traits>&
851 operator<<(basic_ostream<charT, traits>& os, const local_info& li);
852
853// [time.zone.timezone] class time_zone // C++20
854enum class choose {earliest, latest};
855class time_zone {
856 time_zone(time_zone&&) = default;
857 time_zone& operator=(time_zone&&) = default;
858
859 // unspecified additional constructors
860
861 string_view name() const noexcept;
862
863 template<class Duration>
864 sys_info get_info(const sys_time<Duration>& st) const;
865
866 template<class Duration>
867 local_info get_info(const local_time<Duration>& tp) const;
868
869 template<class Duration>
870 sys_time<common_type_t<Duration, seconds>>
871 to_sys(const local_time<Duration>& tp) const;
872
873 template<class Duration>
874 sys_time<common_type_t<Duration, seconds>>
875 to_sys(const local_time<Duration>& tp, choose z) const;
876
877 template<class Duration>
878 local_time<common_type_t<Duration, seconds>>
879 to_local(const sys_time<Duration>& tp) const;
880};
881bool operator==(const time_zone& x, const time_zone& y) noexcept; // C++20
882strong_ordering operator<=>(const time_zone& x, const time_zone& y) noexcept; // C++20
883
884// [time.zone.zonedtraits], class template zoned_traits
885template<class T> struct zoned_traits; // C++20
886
887// [time.zone.zonedtime], class template zoned_time
888template<class Duration, class TimeZonePtr = const time_zone*> // C++20
889class zoned_time;
890
891using zoned_seconds = zoned_time<seconds>; // C++20
892
893template<class Duration1, class Duration2, class TimeZonePtr> // C++20
894 bool operator==(const zoned_time<Duration1, TimeZonePtr>& x,
895 const zoned_time<Duration2, TimeZonePtr>& y);
896
897template<class charT, class traits, class Duration, class TimeZonePtr> // C++20
898 basic_ostream<charT, traits>&
899 operator<<(basic_ostream<charT, traits>& os,
900 const zoned_time<Duration, TimeZonePtr>& t);
901
902// [time.zone.leap], leap second support
903class leap_second { // C++20
904public:
905 leap_second(const leap_second&) = default;
906 leap_second& operator=(const leap_second&) = default;
907
908 // unspecified additional constructors
909
910 constexpr sys_seconds date() const noexcept;
911 constexpr seconds value() const noexcept;
912};
913
914constexpr bool operator==(const leap_second& x, const leap_second& y); // C++20
915constexpr strong_ordering operator<=>(const leap_second& x, const leap_second& y);
916
917template<class Duration> // C++20
918 constexpr bool operator==(const leap_second& x, const sys_time<Duration>& y);
919template<class Duration> // C++20
920 constexpr bool operator< (const leap_second& x, const sys_time<Duration>& y);
921template<class Duration> // C++20
922 constexpr bool operator< (const sys_time<Duration>& x, const leap_second& y);
923template<class Duration> // C++20
924 constexpr bool operator> (const leap_second& x, const sys_time<Duration>& y);
925template<class Duration> // C++20
926 constexpr bool operator> (const sys_time<Duration>& x, const leap_second& y);
927template<class Duration> // C++20
928 constexpr bool operator<=(const leap_second& x, const sys_time<Duration>& y);
929template<class Duration> // C++20
930 constexpr bool operator<=(const sys_time<Duration>& x, const leap_second& y);
931template<class Duration> // C++20
932 constexpr bool operator>=(const leap_second& x, const sys_time<Duration>& y);
933template<class Duration> // C++20
934 constexpr bool operator>=(const sys_time<Duration>& x, const leap_second& y);
935template<class Duration> // C++20
936 requires three_way_comparable_with<sys_seconds, sys_time<Duration>>
937 constexpr auto operator<=>(const leap_second& x, const sys_time<Duration>& y);
938
939// [time.zone.link], class time_zone_link
940class time_zone_link { // C++20
941public:
942 time_zone_link(time_zone_link&&) = default;
943 time_zone_link& operator=(time_zone_link&&) = default;
944
945 // unspecified additional constructors
946
947 string_view name() const noexcept;
948 string_view target() const noexcept;
949};
950
951bool operator==(const time_zone_link& x, const time_zone_link& y); // C++20
952strong_ordering operator<=>(const time_zone_link& x, const time_zone_link& y); // C++20
953
954} // chrono
955
956namespace std {
957 template<class Rep, class Period, class charT>
958 struct formatter<chrono::duration<Rep, Period>, charT>; // C++20
959 template<class Duration, class charT>
960 struct formatter<chrono::sys_time<Duration>, charT>; // C++20
961 template<class Duration, class charT>
962 struct formatter<chrono::utc_time<Duration>, charT>; // C++20
963 template<class Duration, class charT>
964 struct formatter<chrono::tai_time<Duration>, charT>; // C++20
965 template<class Duration, class charT>
966 struct formatter<chrono::gps_time<Duration>, charT>; // C++20
967 template<class Duration, class charT>
968 struct formatter<chrono::file_time<Duration>, charT>; // C++20
969 template<class Duration, class charT>
970 struct formatter<chrono::local_time<Duration>, charT>; // C++20
971 template<class charT> struct formatter<chrono::day, charT>; // C++20
972 template<class charT> struct formatter<chrono::month, charT>; // C++20
973 template<class charT> struct formatter<chrono::year, charT>; // C++20
974 template<class charT> struct formatter<chrono::weekday, charT>; // C++20
975 template<class charT> struct formatter<chrono::weekday_indexed, charT>; // C++20
976 template<class charT> struct formatter<chrono::weekday_last, charT>; // C++20
977 template<class charT> struct formatter<chrono::month_day, charT>; // C++20
978 template<class charT> struct formatter<chrono::month_day_last, charT>; // C++20
979 template<class charT> struct formatter<chrono::month_weekday, charT>; // C++20
980 template<class charT> struct formatter<chrono::month_weekday_last, charT>; // C++20
981 template<class charT> struct formatter<chrono::year_month, charT>; // C++20
982 template<class charT> struct formatter<chrono::year_month_day, charT>; // C++20
983 template<class charT> struct formatter<chrono::year_month_day_last, charT>; // C++20
984 template<class charT> struct formatter<chrono::year_month_weekday, charT>; // C++20
985 template<class charT> struct formatter<chrono::year_month_weekday_last, charT>; // C++20
986 template<class Rep, class Period, class charT>
987 struct formatter<chrono::hh_mm_ss<duration<Rep, Period>>, charT>; // C++20
988 template<class charT> struct formatter<chrono::sys_info, charT>; // C++20
989 template<class charT> struct formatter<chrono::local_info, charT>; // C++20
990 template<class Duration, class TimeZonePtr, class charT> // C++20
991 struct formatter<chrono::zoned_time<Duration, TimeZonePtr>, charT>;
992} // namespace std
993
994namespace chrono {
995// calendrical constants
996inline constexpr last_spec last{}; // C++20
997inline constexpr chrono::weekday Sunday{0}; // C++20
998inline constexpr chrono::weekday Monday{1}; // C++20
999inline constexpr chrono::weekday Tuesday{2}; // C++20
1000inline constexpr chrono::weekday Wednesday{3}; // C++20
1001inline constexpr chrono::weekday Thursday{4}; // C++20
1002inline constexpr chrono::weekday Friday{5}; // C++20
1003inline constexpr chrono::weekday Saturday{6}; // C++20
1004
1005inline constexpr chrono::month January{1}; // C++20
1006inline constexpr chrono::month February{2}; // C++20
1007inline constexpr chrono::month March{3}; // C++20
1008inline constexpr chrono::month April{4}; // C++20
1009inline constexpr chrono::month May{5}; // C++20
1010inline constexpr chrono::month June{6}; // C++20
1011inline constexpr chrono::month July{7}; // C++20
1012inline constexpr chrono::month August{8}; // C++20
1013inline constexpr chrono::month September{9}; // C++20
1014inline constexpr chrono::month October{10}; // C++20
1015inline constexpr chrono::month November{11}; // C++20
1016inline constexpr chrono::month December{12}; // C++20
1017} // chrono
1018
1019inline namespace literals {
1020 inline namespace chrono_literals {
1021constexpr chrono::hours operator ""h(unsigned long long); // C++14
1022constexpr chrono::duration<unspecified , ratio<3600,1>> operator ""h(long double); // C++14
1023constexpr chrono::minutes operator ""min(unsigned long long); // C++14
1024constexpr chrono::duration<unspecified , ratio<60,1>> operator ""min(long double); // C++14
1025constexpr chrono::seconds operator ""s(unsigned long long); // C++14
1026constexpr chrono::duration<unspecified > operator ""s(long double); // C++14
1027constexpr chrono::milliseconds operator ""ms(unsigned long long); // C++14
1028constexpr chrono::duration<unspecified , milli> operator ""ms(long double); // C++14
1029constexpr chrono::microseconds operator ""us(unsigned long long); // C++14
1030constexpr chrono::duration<unspecified , micro> operator ""us(long double); // C++14
1031constexpr chrono::nanoseconds operator ""ns(unsigned long long); // C++14
1032constexpr chrono::duration<unspecified , nano> operator ""ns(long double); // C++14
1033constexpr chrono::day operator ""d(unsigned long long d) noexcept; // C++20
1034constexpr chrono::year operator ""y(unsigned long long y) noexcept; // C++20
1035} // chrono_literals
1036} // literals
1037
1038} // std
1039*/
1040
1041// clang-format on
1042
1043#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
1044# include <__cxx03/chrono>
1045#else
1046# include <__config>
1047
1048# include <__chrono/duration.h>
1049# include <__chrono/file_clock.h>
1050# include <__chrono/high_resolution_clock.h>
1051# include <__chrono/steady_clock.h>
1052# include <__chrono/system_clock.h>
1053# include <__chrono/time_point.h>
1054
1055# if _LIBCPP_STD_VER >= 20
1056# include <__chrono/calendar.h>
1057# include <__chrono/day.h>
1058# include <__chrono/exception.h>
1059# include <__chrono/hh_mm_ss.h>
1060# include <__chrono/literals.h>
1061# include <__chrono/local_info.h>
1062# include <__chrono/month.h>
1063# include <__chrono/month_weekday.h>
1064# include <__chrono/monthday.h>
1065# include <__chrono/sys_info.h>
1066# include <__chrono/weekday.h>
1067# include <__chrono/year.h>
1068# include <__chrono/year_month.h>
1069# include <__chrono/year_month_day.h>
1070# include <__chrono/year_month_weekday.h>
1071
1072# if _LIBCPP_HAS_LOCALIZATION
1073# include <__chrono/formatter.h>
1074# include <__chrono/ostream.h>
1075# include <__chrono/parser_std_format_spec.h>
1076# include <__chrono/statically_widen.h>
1077# endif
1078
1079# if _LIBCPP_HAS_TIME_ZONE_DATABASE && _LIBCPP_HAS_FILESYSTEM && _LIBCPP_HAS_LOCALIZATION
1080# include <__chrono/gps_clock.h>
1081# include <__chrono/leap_second.h>
1082# include <__chrono/tai_clock.h>
1083# include <__chrono/time_zone.h>
1084# include <__chrono/time_zone_link.h>
1085# include <__chrono/tzdb.h>
1086# include <__chrono/tzdb_list.h>
1087# include <__chrono/utc_clock.h>
1088# include <__chrono/zoned_time.h>
1089# endif
1090
1091# endif
1092
1093# include <version>
1094
1095// standard-mandated includes
1096
1097// [time.syn]
1098# include <compare>
1099
1100# if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
1101# pragma GCC system_header
1102# endif
1103
1104# if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 17
1105# include <cstdint>
1106# include <stdexcept>
1107# include <string_view>
1108# endif
1109
1110# if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
1111# include <bit>
1112# include <concepts>
1113# include <cstring>
1114# include <forward_list>
1115# include <string>
1116# include <tuple>
1117# include <vector>
1118# endif
1119
1120# if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER == 20
1121# include <charconv>
1122# if _LIBCPP_HAS_LOCALIZATION
1123# include <locale>
1124# include <ostream>
1125# endif
1126# endif
1127#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
1128
1129#endif // _LIBCPP_CHRONO
1130