projects / thirdparty / gcc.git / blame
| Commit | Line | Data |
|---|---|---|
| 15e38d0d CF |
1 | // <chrono> -*- C++ -*- |
| 2 | ||
| a945c346 | 3 | // Copyright (C) 2008-2024 Free Software Foundation, Inc. |
| 15e38d0d CF |
4 | // |
| 5 | // This file is part of the GNU ISO C++ Library. This library is free | |
| 6 | // software; you can redistribute it and/or modify it under the | |
| 7 | // terms of the GNU General Public License as published by the | |
| 748086b7 | 8 | // Free Software Foundation; either version 3, or (at your option) |
| 15e38d0d CF |
9 | // any later version. |
| 10 | ||
| 11 | // This library is distributed in the hope that it will be useful, | |
| 12 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 14 | // GNU General Public License for more details. | |
| 15 | ||
| 748086b7 JJ |
16 | // Under Section 7 of GPL version 3, you are granted additional |
| 17 | // permissions described in the GCC Runtime Library Exception, version | |
| 18 | // 3.1, as published by the Free Software Foundation. | |
| 15e38d0d | 19 | |
| 748086b7 JJ |
20 | // You should have received a copy of the GNU General Public License and |
| 21 | // a copy of the GCC Runtime Library Exception along with this program; | |
| 22 | // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
| 23 | // <http://www.gnu.org/licenses/>. | |
| 15e38d0d CF |
24 | |
| 25 | /** @file include/chrono | |
| 26 | * This is a Standard C++ Library header. | |
| c34d3fd3 | 27 | * @ingroup chrono |
| 15e38d0d CF |
28 | */ |
| 29 | ||
| 30 | #ifndef _GLIBCXX_CHRONO | |
| 31 | #define _GLIBCXX_CHRONO 1 | |
| 32 | ||
| 33 | #pragma GCC system_header | |
| 34 | ||
| 18f176d0 AA |
35 | #include <bits/requires_hosted.h> // for <ctime> and clocks |
| 36 | ||
| 734f5023 | 37 | #if __cplusplus < 201103L |
| ab65a4c7 | 38 | # include <bits/c++0x_warning.h> |
| 15e38d0d CF |
39 | #else |
| 40 | ||
| 7f78718b | 41 | #include <bits/chrono.h> |
| 1736bf5a JW |
42 | |
| 43 | #if __cplusplus >= 202002L | |
| 5329e1a8 | 44 | # include <bit> |
| 1736bf5a JW |
45 | # include <sstream> |
| 46 | # include <string> | |
| 47 | # include <vector> | |
| 9fc61d45 | 48 | # include <bits/stl_algo.h> // upper_bound |
| 1736bf5a JW |
49 | # include <bits/shared_ptr.h> |
| 50 | # include <bits/unique_ptr.h> | |
| fcc13d6f | 51 | #endif |
| 15e38d0d | 52 | |
| 7ffa63df JW |
53 | #define __glibcxx_want_chrono |
| 54 | #define __glibcxx_want_chrono_udls | |
| 55 | #include <bits/version.h> | |
| 56 | ||
| 12ffa228 BK |
57 | namespace std _GLIBCXX_VISIBILITY(default) |
| 58 | { | |
| 4a15d842 FD |
59 | _GLIBCXX_BEGIN_NAMESPACE_VERSION |
| 60 | ||
| 5b9daa7e BK |
61 | /** |
| 62 | * @defgroup chrono Time | |
| 63 | * @ingroup utilities | |
| 64 | * | |
| 65 | * Classes and functions for time. | |
| f2ce64b5 JW |
66 | * |
| 67 | * @since C++11 | |
| 5b9daa7e BK |
68 | */ |
| 69 | ||
| 70 | /** @namespace std::chrono | |
| 19aaf814 | 71 | * @brief ISO C++ 2011 namespace for date and time utilities |
| f2ce64b5 | 72 | * @ingroup chrono |
| 5b9daa7e | 73 | */ |
| 15e38d0d CF |
74 | namespace chrono |
| 75 | { | |
| 7f78718b | 76 | #if __cplusplus >= 202002L |
| f2ce64b5 JW |
77 | /// @addtogroup chrono |
| 78 | /// @{ | |
| 16948c54 JW |
79 | struct local_t { }; |
| 80 | template<typename _Duration> | |
| 81 | using local_time = time_point<local_t, _Duration>; | |
| 82 | using local_seconds = local_time<seconds>; | |
| 83 | using local_days = local_time<days>; | |
| bf1fc37b | 84 | |
| 03d5044b PP |
85 | class utc_clock; |
| 86 | class tai_clock; | |
| 87 | class gps_clock; | |
| 5b9daa7e | 88 | |
| 03d5044b PP |
89 | template<typename _Duration> |
| 90 | using utc_time = time_point<utc_clock, _Duration>; | |
| 91 | using utc_seconds = utc_time<seconds>; | |
| 15e38d0d | 92 | |
| 03d5044b PP |
93 | template<typename _Duration> |
| 94 | using tai_time = time_point<tai_clock, _Duration>; | |
| 95 | using tai_seconds = tai_time<seconds>; | |
| a15f7cb8 | 96 | |
| 03d5044b PP |
97 | template<typename _Duration> |
| 98 | using gps_time = time_point<gps_clock, _Duration>; | |
| 99 | using gps_seconds = gps_time<seconds>; | |
| 100 | ||
| 101 | template<> struct is_clock<utc_clock> : true_type { }; | |
| 102 | template<> struct is_clock<tai_clock> : true_type { }; | |
| 103 | template<> struct is_clock<gps_clock> : true_type { }; | |
| 104 | ||
| 105 | template<> inline constexpr bool is_clock_v<utc_clock> = true; | |
| 106 | template<> inline constexpr bool is_clock_v<tai_clock> = true; | |
| 107 | template<> inline constexpr bool is_clock_v<gps_clock> = true; | |
| 108 | ||
| 109 | struct leap_second_info | |
| 110 | { | |
| 111 | bool is_leap_second; | |
| 112 | seconds elapsed; | |
| 113 | }; | |
| 114 | ||
| 1736bf5a JW |
115 | template<typename _Duration> |
| 116 | leap_second_info | |
| 117 | get_leap_second_info(const utc_time<_Duration>& __ut); | |
| 118 | ||
| 119 | /** A clock that measures Universal Coordinated Time (UTC). | |
| 120 | * | |
| 121 | * The epoch is 1970-01-01 00:00:00. | |
| 122 | * | |
| 123 | * @since C++20 | |
| 124 | */ | |
| 125 | class utc_clock | |
| 126 | { | |
| 127 | public: | |
| 128 | using rep = system_clock::rep; | |
| 129 | using period = system_clock::period; | |
| 130 | using duration = chrono::duration<rep, period>; | |
| 131 | using time_point = chrono::time_point<utc_clock>; | |
| 132 | static constexpr bool is_steady = false; | |
| 133 | ||
| ec8f914f | 134 | [[nodiscard]] |
| 1736bf5a JW |
135 | static time_point |
| 136 | now() | |
| 137 | { return from_sys(system_clock::now()); } | |
| 138 | ||
| 139 | template<typename _Duration> | |
| ec8f914f | 140 | [[nodiscard]] |
| 1736bf5a JW |
141 | static sys_time<common_type_t<_Duration, seconds>> |
| 142 | to_sys(const utc_time<_Duration>& __t) | |
| 143 | { | |
| 144 | using _CDur = common_type_t<_Duration, seconds>; | |
| 145 | const auto __li = chrono::get_leap_second_info(__t); | |
| 9fc61d45 | 146 | sys_time<_CDur> __s{__t.time_since_epoch() - __li.elapsed}; |
| 1736bf5a JW |
147 | if (__li.is_leap_second) |
| 148 | __s = chrono::floor<seconds>(__s) + seconds{1} - _CDur{1}; | |
| 149 | return __s; | |
| 150 | } | |
| 151 | ||
| 152 | template<typename _Duration> | |
| ec8f914f | 153 | [[nodiscard]] |
| 1736bf5a | 154 | static utc_time<common_type_t<_Duration, seconds>> |
| 9fc61d45 | 155 | from_sys(const sys_time<_Duration>& __t); |
| 1736bf5a JW |
156 | }; |
| 157 | ||
| 158 | /** A clock that measures International Atomic Time. | |
| 159 | * | |
| 160 | * The epoch is 1958-01-01 00:00:00. | |
| 161 | * | |
| 162 | * @since C++20 | |
| 163 | */ | |
| 164 | class tai_clock | |
| 165 | { | |
| 166 | public: | |
| 167 | using rep = system_clock::rep; | |
| 168 | using period = system_clock::period; | |
| 169 | using duration = chrono::duration<rep, period>; | |
| 170 | using time_point = chrono::time_point<tai_clock>; | |
| 171 | static constexpr bool is_steady = false; // XXX true for CLOCK_TAI? | |
| 172 | ||
| 173 | // TODO move into lib, use CLOCK_TAI on linux, add extension point. | |
| ec8f914f | 174 | [[nodiscard]] |
| 1736bf5a JW |
175 | static time_point |
| 176 | now() | |
| 177 | { return from_utc(utc_clock::now()); } | |
| 178 | ||
| 179 | template<typename _Duration> | |
| ec8f914f | 180 | [[nodiscard]] |
| 1736bf5a JW |
181 | static utc_time<common_type_t<_Duration, seconds>> |
| 182 | to_utc(const tai_time<_Duration>& __t) | |
| 183 | { | |
| 184 | using _CDur = common_type_t<_Duration, seconds>; | |
| 185 | return utc_time<_CDur>{__t.time_since_epoch()} - 378691210s; | |
| 186 | } | |
| 187 | ||
| 188 | template<typename _Duration> | |
| ec8f914f | 189 | [[nodiscard]] |
| 1736bf5a JW |
190 | static tai_time<common_type_t<_Duration, seconds>> |
| 191 | from_utc(const utc_time<_Duration>& __t) | |
| 192 | { | |
| 193 | using _CDur = common_type_t<_Duration, seconds>; | |
| 194 | return tai_time<_CDur>{__t.time_since_epoch()} + 378691210s; | |
| 195 | } | |
| 196 | }; | |
| 197 | ||
| 198 | /** A clock that measures GPS time. | |
| 199 | * | |
| 200 | * The epoch is 1980-01-06 00:00:00. | |
| 201 | * | |
| 202 | * @since C++20 | |
| 203 | */ | |
| 204 | class gps_clock | |
| 205 | { | |
| 206 | public: | |
| 207 | using rep = system_clock::rep; | |
| 208 | using period = system_clock::period; | |
| 209 | using duration = chrono::duration<rep, period>; | |
| 210 | using time_point = chrono::time_point<gps_clock>; | |
| 211 | static constexpr bool is_steady = false; // XXX | |
| 212 | ||
| 213 | // TODO move into lib, add extension point. | |
| ec8f914f | 214 | [[nodiscard]] |
| 1736bf5a JW |
215 | static time_point |
| 216 | now() | |
| 217 | { return from_utc(utc_clock::now()); } | |
| 218 | ||
| 219 | template<typename _Duration> | |
| ec8f914f | 220 | [[nodiscard]] |
| 1736bf5a JW |
221 | static utc_time<common_type_t<_Duration, seconds>> |
| 222 | to_utc(const gps_time<_Duration>& __t) | |
| 223 | { | |
| 224 | using _CDur = common_type_t<_Duration, seconds>; | |
| 225 | return utc_time<_CDur>{__t.time_since_epoch()} + 315964809s; | |
| 226 | } | |
| 227 | ||
| 228 | template<typename _Duration> | |
| ec8f914f | 229 | [[nodiscard]] |
| 1736bf5a JW |
230 | static gps_time<common_type_t<_Duration, seconds>> |
| 231 | from_utc(const utc_time<_Duration>& __t) | |
| 232 | { | |
| 233 | using _CDur = common_type_t<_Duration, seconds>; | |
| 234 | return gps_time<_CDur>{__t.time_since_epoch()} - 315964809s; | |
| 235 | } | |
| 236 | }; | |
| 237 | ||
| 238 | ||
| 239 | template<typename _DestClock, typename _SourceClock> | |
| 240 | struct clock_time_conversion | |
| 241 | { }; | |
| 242 | ||
| 243 | // Identity conversions | |
| 244 | ||
| 245 | template<typename _Clock> | |
| 246 | struct clock_time_conversion<_Clock, _Clock> | |
| 247 | { | |
| 248 | template<typename _Duration> | |
| 249 | time_point<_Clock, _Duration> | |
| 250 | operator()(const time_point<_Clock, _Duration>& __t) const | |
| 251 | { return __t; } | |
| 252 | }; | |
| 253 | ||
| 254 | template<> | |
| 255 | struct clock_time_conversion<system_clock, system_clock> | |
| 256 | { | |
| 257 | template<typename _Duration> | |
| 258 | sys_time<_Duration> | |
| 259 | operator()(const sys_time<_Duration>& __t) const | |
| 260 | { return __t; } | |
| 261 | }; | |
| 262 | ||
| 263 | template<> | |
| 264 | struct clock_time_conversion<utc_clock, utc_clock> | |
| 265 | { | |
| 266 | template<typename _Duration> | |
| 267 | utc_time<_Duration> | |
| 268 | operator()(const utc_time<_Duration>& __t) const | |
| 269 | { return __t; } | |
| 270 | }; | |
| 271 | ||
| 272 | // Conversions between system_clock and utc_clock | |
| 273 | ||
| 274 | template<> | |
| 275 | struct clock_time_conversion<utc_clock, system_clock> | |
| 276 | { | |
| 277 | template<typename _Duration> | |
| 278 | utc_time<common_type_t<_Duration, seconds>> | |
| 279 | operator()(const sys_time<_Duration>& __t) const | |
| 280 | { return utc_clock::from_sys(__t); } | |
| 281 | }; | |
| 282 | ||
| 283 | template<> | |
| 284 | struct clock_time_conversion<system_clock, utc_clock> | |
| 285 | { | |
| 286 | template<typename _Duration> | |
| 287 | sys_time<common_type_t<_Duration, seconds>> | |
| 288 | operator()(const utc_time<_Duration>& __t) const | |
| 289 | { return utc_clock::to_sys(__t); } | |
| 290 | }; | |
| 291 | ||
| 292 | template<typename _Tp, typename _Clock> | |
| 293 | inline constexpr bool __is_time_point_for_v = false; | |
| 294 | ||
| 295 | template<typename _Clock, typename _Duration> | |
| 296 | inline constexpr bool | |
| 297 | __is_time_point_for_v<time_point<_Clock, _Duration>, _Clock> = true; | |
| 298 | ||
| 299 | // Conversions between system_clock and other clocks | |
| 300 | ||
| 301 | template<typename _SourceClock> | |
| 302 | struct clock_time_conversion<system_clock, _SourceClock> | |
| 303 | { | |
| 304 | template<typename _Duration, typename _Src = _SourceClock> | |
| 305 | auto | |
| 306 | operator()(const time_point<_SourceClock, _Duration>& __t) const | |
| 307 | -> decltype(_Src::to_sys(__t)) | |
| 308 | { | |
| 309 | using _Ret = decltype(_SourceClock::to_sys(__t)); | |
| 310 | static_assert(__is_time_point_for_v<_Ret, system_clock>); | |
| 311 | return _SourceClock::to_sys(__t); | |
| 312 | } | |
| 313 | }; | |
| 314 | ||
| 315 | template<typename _DestClock> | |
| 316 | struct clock_time_conversion<_DestClock, system_clock> | |
| 317 | { | |
| 318 | template<typename _Duration, typename _Dest = _DestClock> | |
| 319 | auto | |
| 320 | operator()(const sys_time<_Duration>& __t) const | |
| 321 | -> decltype(_Dest::from_sys(__t)) | |
| 322 | { | |
| 323 | using _Ret = decltype(_DestClock::from_sys(__t)); | |
| 324 | static_assert(__is_time_point_for_v<_Ret, _DestClock>); | |
| 325 | return _DestClock::from_sys(__t); | |
| 326 | } | |
| 327 | }; | |
| 328 | ||
| 329 | // Conversions between utc_clock and other clocks | |
| 330 | ||
| 331 | template<typename _SourceClock> | |
| 332 | struct clock_time_conversion<utc_clock, _SourceClock> | |
| 333 | { | |
| 334 | template<typename _Duration, typename _Src = _SourceClock> | |
| 335 | auto | |
| 336 | operator()(const time_point<_SourceClock, _Duration>& __t) const | |
| 337 | -> decltype(_Src::to_utc(__t)) | |
| 338 | { | |
| 339 | using _Ret = decltype(_SourceClock::to_utc(__t)); | |
| 340 | static_assert(__is_time_point_for_v<_Ret, utc_clock>); | |
| 341 | return _SourceClock::to_utc(__t); | |
| 342 | } | |
| 343 | }; | |
| 344 | ||
| 345 | template<typename _DestClock> | |
| 346 | struct clock_time_conversion<_DestClock, utc_clock> | |
| 347 | { | |
| 348 | template<typename _Duration, typename _Dest = _DestClock> | |
| 349 | auto | |
| 350 | operator()(const utc_time<_Duration>& __t) const | |
| 351 | -> decltype(_Dest::from_utc(__t)) | |
| 352 | { | |
| 353 | using _Ret = decltype(_DestClock::from_utc(__t)); | |
| 354 | static_assert(__is_time_point_for_v<_Ret, _DestClock>); | |
| 355 | return _DestClock::from_utc(__t); | |
| 356 | } | |
| 357 | }; | |
| 358 | ||
| 359 | /// @cond undocumented | |
| 360 | namespace __detail | |
| 361 | { | |
| 362 | template<typename _DestClock, typename _SourceClock, typename _Duration> | |
| 363 | concept __clock_convs | |
| 364 | = requires (const time_point<_SourceClock, _Duration>& __t) { | |
| 365 | clock_time_conversion<_DestClock, _SourceClock>{}(__t); | |
| 366 | }; | |
| 367 | ||
| 368 | template<typename _DestClock, typename _SourceClock, typename _Duration> | |
| 369 | concept __clock_convs_sys | |
| 370 | = requires (const time_point<_SourceClock, _Duration>& __t) { | |
| 371 | clock_time_conversion<_DestClock, system_clock>{}( | |
| 372 | clock_time_conversion<system_clock, _SourceClock>{}(__t)); | |
| 373 | }; | |
| 374 | ||
| 375 | template<typename _DestClock, typename _SourceClock, typename _Duration> | |
| 376 | concept __clock_convs_utc | |
| 377 | = requires (const time_point<_SourceClock, _Duration>& __t) { | |
| 378 | clock_time_conversion<_DestClock, utc_clock>{}( | |
| 379 | clock_time_conversion<utc_clock, _SourceClock>{}(__t)); | |
| 380 | }; | |
| 381 | ||
| 382 | template<typename _DestClock, typename _SourceClock, typename _Duration> | |
| 383 | concept __clock_convs_sys_utc | |
| 384 | = requires (const time_point<_SourceClock, _Duration>& __t) { | |
| 385 | clock_time_conversion<_DestClock, utc_clock>{}( | |
| 386 | clock_time_conversion<utc_clock, system_clock>{}( | |
| 387 | clock_time_conversion<system_clock, _SourceClock>{}(__t))); | |
| 388 | }; | |
| 389 | ||
| 390 | template<typename _DestClock, typename _SourceClock, typename _Duration> | |
| 391 | concept __clock_convs_utc_sys | |
| 392 | = requires (const time_point<_SourceClock, _Duration>& __t) { | |
| 393 | clock_time_conversion<_DestClock, system_clock>{}( | |
| 394 | clock_time_conversion<system_clock, utc_clock>{}( | |
| 395 | clock_time_conversion<utc_clock, _SourceClock>{}(__t))); | |
| 396 | }; | |
| 397 | ||
| 398 | } // namespace __detail | |
| 399 | /// @endcond | |
| 400 | ||
| 401 | /// Convert a time point to a different clock. | |
| 402 | template<typename _DestClock, typename _SourceClock, typename _Duration> | |
| ec8f914f | 403 | [[nodiscard]] |
| 1736bf5a JW |
404 | inline auto |
| 405 | clock_cast(const time_point<_SourceClock, _Duration>& __t) | |
| 406 | requires __detail::__clock_convs<_DestClock, _SourceClock, _Duration> | |
| 407 | || __detail::__clock_convs_sys<_DestClock, _SourceClock, _Duration> | |
| 408 | || __detail::__clock_convs_utc<_DestClock, _SourceClock, _Duration> | |
| 409 | || __detail::__clock_convs_sys_utc<_DestClock, _SourceClock, _Duration> | |
| 410 | || __detail::__clock_convs_utc_sys<_DestClock, _SourceClock, _Duration> | |
| 411 | { | |
| 412 | constexpr bool __direct | |
| 413 | = __detail::__clock_convs<_DestClock, _SourceClock, _Duration>; | |
| 414 | if constexpr (__direct) | |
| 415 | { | |
| 416 | return clock_time_conversion<_DestClock, _SourceClock>{}(__t); | |
| 417 | } | |
| 418 | else | |
| 419 | { | |
| 420 | constexpr bool __convert_via_sys_clock | |
| 421 | = __detail::__clock_convs_sys<_DestClock, _SourceClock, _Duration>; | |
| 422 | constexpr bool __convert_via_utc_clock | |
| 423 | = __detail::__clock_convs_utc<_DestClock, _SourceClock, _Duration>; | |
| 424 | if constexpr (__convert_via_sys_clock) | |
| 425 | { | |
| 426 | static_assert(!__convert_via_utc_clock, | |
| 427 | "clock_cast requires a unique best conversion, but " | |
| 428 | "conversion is possible via system_clock and also via" | |
| 429 | "utc_clock"); | |
| 430 | return clock_time_conversion<_DestClock, system_clock>{}( | |
| 431 | clock_time_conversion<system_clock, _SourceClock>{}(__t)); | |
| 432 | } | |
| 433 | else if constexpr (__convert_via_utc_clock) | |
| 434 | { | |
| 435 | return clock_time_conversion<_DestClock, utc_clock>{}( | |
| 436 | clock_time_conversion<utc_clock, _SourceClock>{}(__t)); | |
| 437 | } | |
| 438 | else | |
| 439 | { | |
| 440 | constexpr bool __convert_via_sys_and_utc_clocks | |
| 441 | = __detail::__clock_convs_sys_utc<_DestClock, | |
| 442 | _SourceClock, | |
| 443 | _Duration>; | |
| 444 | ||
| 445 | if constexpr (__convert_via_sys_and_utc_clocks) | |
| 446 | { | |
| 447 | constexpr bool __convert_via_utc_and_sys_clocks | |
| 448 | = __detail::__clock_convs_utc_sys<_DestClock, | |
| 449 | _SourceClock, | |
| 450 | _Duration>; | |
| 451 | static_assert(!__convert_via_utc_and_sys_clocks, | |
| 452 | "clock_cast requires a unique best conversion, but " | |
| 453 | "conversion is possible via system_clock followed by " | |
| 454 | "utc_clock, and also via utc_clock followed by " | |
| 455 | "system_clock"); | |
| 456 | return clock_time_conversion<_DestClock, utc_clock>{}( | |
| 457 | clock_time_conversion<utc_clock, system_clock>{}( | |
| 458 | clock_time_conversion<system_clock, _SourceClock>{}(__t))); | |
| 459 | } | |
| 460 | else | |
| 461 | { | |
| 462 | return clock_time_conversion<_DestClock, system_clock>{}( | |
| 463 | clock_time_conversion<system_clock, utc_clock>{}( | |
| 464 | clock_time_conversion<utc_clock, _SourceClock>{}(__t))); | |
| 465 | } | |
| 466 | } | |
| 467 | } | |
| 468 | } | |
| 469 | ||
| 03d5044b PP |
470 | // CALENDRICAL TYPES |
| 471 | ||
| 472 | // CLASS DECLARATIONS | |
| 473 | class day; | |
| 474 | class month; | |
| 475 | class year; | |
| 476 | class weekday; | |
| 477 | class weekday_indexed; | |
| 478 | class weekday_last; | |
| 479 | class month_day; | |
| 480 | class month_day_last; | |
| 481 | class month_weekday; | |
| 482 | class month_weekday_last; | |
| 483 | class year_month; | |
| 484 | class year_month_day; | |
| 485 | class year_month_day_last; | |
| 486 | class year_month_weekday; | |
| 487 | class year_month_weekday_last; | |
| 488 | ||
| 489 | struct last_spec | |
| 490 | { | |
| 491 | explicit last_spec() = default; | |
| 492 | ||
| 493 | friend constexpr month_day_last | |
| 494 | operator/(int __m, last_spec) noexcept; | |
| 495 | ||
| 496 | friend constexpr month_day_last | |
| 497 | operator/(last_spec, int __m) noexcept; | |
| 498 | }; | |
| 499 | ||
| 500 | inline constexpr last_spec last{}; | |
| 501 | ||
| 502 | namespace __detail | |
| 503 | { | |
| 504 | // Compute the remainder of the Euclidean division of __n divided by __d. | |
| 505 | // Euclidean division truncates toward negative infinity and always | |
| 506 | // produces a remainder in the range of [0,__d-1] (whereas standard | |
| 507 | // division truncates toward zero and yields a nonpositive remainder | |
| 508 | // for negative __n). | |
| 509 | constexpr unsigned | |
| 510 | __modulo(long long __n, unsigned __d) | |
| cd1464db | 511 | { |
| 03d5044b PP |
512 | if (__n >= 0) |
| 513 | return __n % __d; | |
| 514 | else | |
| 515 | return (__d + (__n % __d)) % __d; | |
| cd1464db | 516 | } |
| 1c9f675f | 517 | |
| 03d5044b PP |
518 | inline constexpr unsigned __days_per_month[12] |
| 519 | = { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; | |
| 03d5044b | 520 | } |
| 88c4d6b7 | 521 | |
| 03d5044b | 522 | // DAY |
| 1c9f675f | 523 | |
| 03d5044b PP |
524 | class day |
| 525 | { | |
| 526 | private: | |
| 527 | unsigned char _M_d; | |
| 1c9f675f | 528 | |
| 03d5044b PP |
529 | public: |
| 530 | day() = default; | |
| 1c9f675f | 531 | |
| 03d5044b PP |
532 | explicit constexpr |
| 533 | day(unsigned __d) noexcept | |
| 534 | : _M_d(__d) | |
| 535 | { } | |
| 1c9f675f | 536 | |
| 03d5044b PP |
537 | constexpr day& |
| 538 | operator++() noexcept | |
| 539 | { | |
| 540 | ++_M_d; | |
| 541 | return *this; | |
| 542 | } | |
| 1c9f675f | 543 | |
| 03d5044b PP |
544 | constexpr day |
| 545 | operator++(int) noexcept | |
| 546 | { | |
| 547 | auto __ret = *this; | |
| 548 | ++(*this); | |
| 549 | return __ret; | |
| 550 | } | |
| 1c9f675f | 551 | |
| 03d5044b PP |
552 | constexpr day& |
| 553 | operator--() noexcept | |
| 554 | { | |
| 555 | --_M_d; | |
| 556 | return *this; | |
| 557 | } | |
| 1c9f675f | 558 | |
| 03d5044b PP |
559 | constexpr day |
| 560 | operator--(int) noexcept | |
| 561 | { | |
| 562 | auto __ret = *this; | |
| 563 | --(*this); | |
| 564 | return __ret; | |
| 565 | } | |
| 88c4d6b7 | 566 | |
| 03d5044b PP |
567 | constexpr day& |
| 568 | operator+=(const days& __d) noexcept | |
| 569 | { | |
| 570 | *this = *this + __d; | |
| 571 | return *this; | |
| 572 | } | |
| 88c4d6b7 | 573 | |
| 03d5044b PP |
574 | constexpr day& |
| 575 | operator-=(const days& __d) noexcept | |
| 576 | { | |
| 577 | *this = *this - __d; | |
| 578 | return *this; | |
| 579 | } | |
| 88c4d6b7 | 580 | |
| 03d5044b PP |
581 | constexpr explicit |
| 582 | operator unsigned() const noexcept | |
| 583 | { return _M_d; } | |
| 88c4d6b7 | 584 | |
| 03d5044b PP |
585 | constexpr bool |
| 586 | ok() const noexcept | |
| 587 | { return 1 <= _M_d && _M_d <= 31; } | |
| 588 | ||
| 589 | friend constexpr bool | |
| 590 | operator==(const day& __x, const day& __y) noexcept | |
| 591 | { return unsigned{__x} == unsigned{__y}; } | |
| 592 | ||
| 593 | friend constexpr strong_ordering | |
| 594 | operator<=>(const day& __x, const day& __y) noexcept | |
| 595 | { return unsigned{__x} <=> unsigned{__y}; } | |
| 596 | ||
| 597 | friend constexpr day | |
| 598 | operator+(const day& __x, const days& __y) noexcept | |
| 599 | { return day(unsigned{__x} + __y.count()); } | |
| 600 | ||
| 601 | friend constexpr day | |
| 602 | operator+(const days& __x, const day& __y) noexcept | |
| 603 | { return __y + __x; } | |
| 604 | ||
| 605 | friend constexpr day | |
| 606 | operator-(const day& __x, const days& __y) noexcept | |
| 607 | { return __x + -__y; } | |
| 608 | ||
| 609 | friend constexpr days | |
| 610 | operator-(const day& __x, const day& __y) noexcept | |
| 611 | { return days{int(unsigned{__x}) - int(unsigned{__y})}; } | |
| 612 | ||
| 613 | friend constexpr month_day | |
| 614 | operator/(const month& __m, const day& __d) noexcept; | |
| 615 | ||
| 616 | friend constexpr month_day | |
| 617 | operator/(int __m, const day& __d) noexcept; | |
| 618 | ||
| 619 | friend constexpr month_day | |
| 620 | operator/(const day& __d, const month& __m) noexcept; | |
| 621 | ||
| 622 | friend constexpr month_day | |
| 623 | operator/(const day& __d, int __m) noexcept; | |
| 624 | ||
| 625 | friend constexpr year_month_day | |
| 626 | operator/(const year_month& __ym, const day& __d) noexcept; | |
| 03d5044b PP |
627 | }; |
| 628 | ||
| 629 | // MONTH | |
| 630 | ||
| 631 | class month | |
| 632 | { | |
| 633 | private: | |
| 634 | unsigned char _M_m; | |
| 635 | ||
| 636 | public: | |
| 637 | month() = default; | |
| 638 | ||
| 639 | explicit constexpr | |
| 640 | month(unsigned __m) noexcept | |
| 641 | : _M_m(__m) | |
| 642 | { } | |
| 643 | ||
| 644 | constexpr month& | |
| 645 | operator++() noexcept | |
| 646 | { | |
| 647 | *this += months{1}; | |
| 648 | return *this; | |
| 649 | } | |
| 650 | ||
| 651 | constexpr month | |
| 652 | operator++(int) noexcept | |
| 653 | { | |
| 654 | auto __ret = *this; | |
| 655 | ++(*this); | |
| 656 | return __ret; | |
| 657 | } | |
| 658 | ||
| 659 | constexpr month& | |
| 660 | operator--() noexcept | |
| 661 | { | |
| 662 | *this -= months{1}; | |
| 663 | return *this; | |
| 664 | } | |
| 665 | ||
| 666 | constexpr month | |
| 667 | operator--(int) noexcept | |
| 668 | { | |
| 669 | auto __ret = *this; | |
| 670 | --(*this); | |
| 671 | return __ret; | |
| 672 | } | |
| 673 | ||
| 674 | constexpr month& | |
| 675 | operator+=(const months& __m) noexcept | |
| 676 | { | |
| 677 | *this = *this + __m; | |
| 678 | return *this; | |
| 679 | } | |
| 680 | ||
| 681 | constexpr month& | |
| 682 | operator-=(const months& __m) noexcept | |
| 683 | { | |
| 684 | *this = *this - __m; | |
| 685 | return *this; | |
| 686 | } | |
| 687 | ||
| 688 | explicit constexpr | |
| 689 | operator unsigned() const noexcept | |
| 690 | { return _M_m; } | |
| 691 | ||
| 692 | constexpr bool | |
| 693 | ok() const noexcept | |
| 694 | { return 1 <= _M_m && _M_m <= 12; } | |
| 695 | ||
| 696 | friend constexpr bool | |
| 697 | operator==(const month& __x, const month& __y) noexcept | |
| 698 | { return unsigned{__x} == unsigned{__y}; } | |
| 699 | ||
| 700 | friend constexpr strong_ordering | |
| 701 | operator<=>(const month& __x, const month& __y) noexcept | |
| 702 | { return unsigned{__x} <=> unsigned{__y}; } | |
| 703 | ||
| 704 | friend constexpr month | |
| 705 | operator+(const month& __x, const months& __y) noexcept | |
| 706 | { | |
| 707 | auto __n = static_cast<long long>(unsigned{__x}) + (__y.count() - 1); | |
| 708 | return month{__detail::__modulo(__n, 12) + 1}; | |
| 709 | } | |
| 710 | ||
| 711 | friend constexpr month | |
| 712 | operator+(const months& __x, const month& __y) noexcept | |
| 713 | { return __y + __x; } | |
| 714 | ||
| 715 | friend constexpr month | |
| 716 | operator-(const month& __x, const months& __y) noexcept | |
| 717 | { return __x + -__y; } | |
| 718 | ||
| 719 | friend constexpr months | |
| 720 | operator-(const month& __x, const month& __y) noexcept | |
| 721 | { | |
| 722 | const auto __dm = int(unsigned(__x)) - int(unsigned(__y)); | |
| 723 | return months{__dm < 0 ? 12 + __dm : __dm}; | |
| 724 | } | |
| 725 | ||
| 726 | friend constexpr year_month | |
| 727 | operator/(const year& __y, const month& __m) noexcept; | |
| 728 | ||
| 729 | friend constexpr month_day | |
| 730 | operator/(const month& __m, int __d) noexcept; | |
| 731 | ||
| 732 | friend constexpr month_day_last | |
| 733 | operator/(const month& __m, last_spec) noexcept; | |
| 734 | ||
| 735 | friend constexpr month_day_last | |
| 736 | operator/(last_spec, const month& __m) noexcept; | |
| 737 | ||
| 738 | friend constexpr month_weekday | |
| 739 | operator/(const month& __m, const weekday_indexed& __wdi) noexcept; | |
| 740 | ||
| 741 | friend constexpr month_weekday | |
| 742 | operator/(const weekday_indexed& __wdi, const month& __m) noexcept; | |
| 743 | ||
| 744 | friend constexpr month_weekday_last | |
| 745 | operator/(const month& __m, const weekday_last& __wdl) noexcept; | |
| 746 | ||
| 747 | friend constexpr month_weekday_last | |
| 748 | operator/(const weekday_last& __wdl, const month& __m) noexcept; | |
| 03d5044b PP |
749 | }; |
| 750 | ||
| 751 | inline constexpr month January{1}; | |
| 752 | inline constexpr month February{2}; | |
| 753 | inline constexpr month March{3}; | |
| 754 | inline constexpr month April{4}; | |
| 755 | inline constexpr month May{5}; | |
| 756 | inline constexpr month June{6}; | |
| 757 | inline constexpr month July{7}; | |
| 758 | inline constexpr month August{8}; | |
| 759 | inline constexpr month September{9}; | |
| 760 | inline constexpr month October{10}; | |
| 761 | inline constexpr month November{11}; | |
| 762 | inline constexpr month December{12}; | |
| 763 | ||
| 764 | // YEAR | |
| 765 | ||
| 766 | class year | |
| 767 | { | |
| 768 | private: | |
| 769 | short _M_y; | |
| 770 | ||
| 771 | public: | |
| 772 | year() = default; | |
| 773 | ||
| 774 | explicit constexpr | |
| 775 | year(int __y) noexcept | |
| 776 | : _M_y{static_cast<short>(__y)} | |
| 777 | { } | |
| 778 | ||
| 779 | static constexpr year | |
| 780 | min() noexcept | |
| 781 | { return year{-32767}; } | |
| 782 | ||
| 783 | static constexpr year | |
| 784 | max() noexcept | |
| 785 | { return year{32767}; } | |
| 786 | ||
| 787 | constexpr year& | |
| 788 | operator++() noexcept | |
| 789 | { | |
| 790 | ++_M_y; | |
| 791 | return *this; | |
| 792 | } | |
| 793 | ||
| 794 | constexpr year | |
| 795 | operator++(int) noexcept | |
| 796 | { | |
| 797 | auto __ret = *this; | |
| 798 | ++(*this); | |
| 799 | return __ret; | |
| 800 | } | |
| 801 | ||
| 802 | constexpr year& | |
| 803 | operator--() noexcept | |
| 804 | { | |
| 805 | --_M_y; | |
| 806 | return *this; | |
| 807 | } | |
| 808 | ||
| 809 | constexpr year | |
| 810 | operator--(int) noexcept | |
| 811 | { | |
| 812 | auto __ret = *this; | |
| 813 | --(*this); | |
| 814 | return __ret; | |
| 815 | } | |
| 816 | ||
| 817 | constexpr year& | |
| 818 | operator+=(const years& __y) noexcept | |
| 819 | { | |
| 820 | *this = *this + __y; | |
| 821 | return *this; | |
| 822 | } | |
| 823 | ||
| 824 | constexpr year& | |
| 825 | operator-=(const years& __y) noexcept | |
| 826 | { | |
| 827 | *this = *this - __y; | |
| 828 | return *this; | |
| 829 | } | |
| 830 | ||
| 831 | constexpr year | |
| 832 | operator+() const noexcept | |
| 833 | { return *this; } | |
| 834 | ||
| 835 | constexpr year | |
| 836 | operator-() const noexcept | |
| 837 | { return year{-_M_y}; } | |
| 838 | ||
| 839 | constexpr bool | |
| 840 | is_leap() const noexcept | |
| 12679397 | 841 | { |
| 86a0df1a CN |
842 | // Testing divisibility by 100 first gives better performance [1], i.e., |
| 843 | // return _M_y % 100 == 0 ? _M_y % 400 == 0 : _M_y % 16 == 0; | |
| 844 | // Furthermore, if _M_y % 100 == 0, then _M_y % 400 == 0 is equivalent | |
| 845 | // to _M_y % 16 == 0, so we can simplify it to | |
| 846 | // return _M_y % 100 == 0 ? _M_y % 16 == 0 : _M_y % 4 == 0. // #1 | |
| 847 | // Similarly, we can replace 100 with 25 (which is good since | |
| 848 | // _M_y % 25 == 0 requires one fewer instruction than _M_y % 100 == 0 | |
| 849 | // [2]): | |
| 850 | // return _M_y % 25 == 0 ? _M_y % 16 == 0 : _M_y % 4 == 0. // #2 | |
| 851 | // Indeed, first assume _M_y % 4 != 0. Then _M_y % 16 != 0 and hence, | |
| 852 | // _M_y % 4 == 0 and _M_y % 16 == 0 are both false. Therefore, #2 | |
| 853 | // returns false as it should (regardless of _M_y % 25.) Now assume | |
| 854 | // _M_y % 4 == 0. In this case, _M_y % 25 == 0 if, and only if, | |
| 855 | // _M_y % 100 == 0, that is, #1 and #2 are equivalent. Finally, #2 is | |
| 856 | // equivalent to | |
| 857 | // return (_M_y & (_M_y % 25 == 0 ? 15 : 3)) == 0. | |
| 12679397 CN |
858 | |
| 859 | // References: | |
| 860 | // [1] https://github.com/cassioneri/calendar | |
| 86a0df1a CN |
861 | // [2] https://godbolt.org/z/55G8rn77e |
| 862 | // [3] https://gcc.gnu.org/pipermail/libstdc++/2021-June/052815.html | |
| 863 | ||
| 864 | return (_M_y & (_M_y % 25 == 0 ? 15 : 3)) == 0; | |
| 12679397 | 865 | } |
| 03d5044b PP |
866 | |
| 867 | explicit constexpr | |
| 868 | operator int() const noexcept | |
| 869 | { return _M_y; } | |
| 870 | ||
| 871 | constexpr bool | |
| 872 | ok() const noexcept | |
| 873 | { return min()._M_y <= _M_y && _M_y <= max()._M_y; } | |
| 874 | ||
| 875 | friend constexpr bool | |
| 876 | operator==(const year& __x, const year& __y) noexcept | |
| 877 | { return int{__x} == int{__y}; } | |
| 878 | ||
| 879 | friend constexpr strong_ordering | |
| 880 | operator<=>(const year& __x, const year& __y) noexcept | |
| 881 | { return int{__x} <=> int{__y}; } | |
| 882 | ||
| 883 | friend constexpr year | |
| 884 | operator+(const year& __x, const years& __y) noexcept | |
| b6b9fd4a | 885 | { return year{int{__x} + static_cast<int>(__y.count())}; } |
| 03d5044b PP |
886 | |
| 887 | friend constexpr year | |
| 888 | operator+(const years& __x, const year& __y) noexcept | |
| 889 | { return __y + __x; } | |
| 890 | ||
| 891 | friend constexpr year | |
| 892 | operator-(const year& __x, const years& __y) noexcept | |
| 893 | { return __x + -__y; } | |
| 894 | ||
| 895 | friend constexpr years | |
| 896 | operator-(const year& __x, const year& __y) noexcept | |
| 897 | { return years{int{__x} - int{__y}}; } | |
| 898 | ||
| 899 | friend constexpr year_month | |
| 900 | operator/(const year& __y, int __m) noexcept; | |
| 901 | ||
| 902 | friend constexpr year_month_day | |
| 903 | operator/(const year& __y, const month_day& __md) noexcept; | |
| 904 | ||
| 905 | friend constexpr year_month_day | |
| 906 | operator/(const month_day& __md, const year& __y) noexcept; | |
| 907 | ||
| 908 | friend constexpr year_month_day_last | |
| 909 | operator/(const year& __y, const month_day_last& __mdl) noexcept; | |
| 910 | ||
| 911 | friend constexpr year_month_day_last | |
| 912 | operator/(const month_day_last& __mdl, const year& __y) noexcept; | |
| 913 | ||
| 914 | friend constexpr year_month_weekday | |
| 915 | operator/(const year& __y, const month_weekday& __mwd) noexcept; | |
| 916 | ||
| 917 | friend constexpr year_month_weekday | |
| 918 | operator/(const month_weekday& __mwd, const year& __y) noexcept; | |
| 919 | ||
| 920 | friend constexpr year_month_weekday_last | |
| 921 | operator/(const year& __y, const month_weekday_last& __mwdl) noexcept; | |
| 922 | ||
| 923 | friend constexpr year_month_weekday_last | |
| 924 | operator/(const month_weekday_last& __mwdl, const year& __y) noexcept; | |
| 03d5044b PP |
925 | }; |
| 926 | ||
| 927 | // WEEKDAY | |
| 928 | ||
| 929 | class weekday | |
| 930 | { | |
| 931 | private: | |
| 932 | unsigned char _M_wd; | |
| 933 | ||
| 934 | static constexpr weekday | |
| 935 | _S_from_days(const days& __d) | |
| 936 | { | |
| f6ce081d CN |
937 | using _Rep = days::rep; |
| 938 | using _URep = make_unsigned_t<_Rep>; | |
| 939 | const auto __n = __d.count(); | |
| 940 | const auto __m = static_cast<_URep>(__n); | |
| 941 | ||
| 942 | // 1970-01-01 (__n = 0, __m = 0 ) -> Thursday (4) | |
| 943 | // 1969-31-12 (__n = -1, __m = _URep(-1)) -> Wednesday (3) | |
| 944 | const auto __offset = __n >= 0 ? _URep(4) : 3 - _URep(-1) % 7 - 7; | |
| 945 | return weekday((__m + __offset) % 7); | |
| 03d5044b PP |
946 | } |
| 947 | ||
| 948 | public: | |
| 949 | weekday() = default; | |
| 950 | ||
| 951 | explicit constexpr | |
| 952 | weekday(unsigned __wd) noexcept | |
| 953 | : _M_wd(__wd == 7 ? 0 : __wd) // __wd % 7 ? | |
| 954 | { } | |
| 955 | ||
| 956 | constexpr | |
| 957 | weekday(const sys_days& __dp) noexcept | |
| 958 | : weekday{_S_from_days(__dp.time_since_epoch())} | |
| 959 | { } | |
| 960 | ||
| 961 | explicit constexpr | |
| 962 | weekday(const local_days& __dp) noexcept | |
| 963 | : weekday{sys_days{__dp.time_since_epoch()}} | |
| 964 | { } | |
| 965 | ||
| 966 | constexpr weekday& | |
| 967 | operator++() noexcept | |
| 968 | { | |
| 969 | *this += days{1}; | |
| 970 | return *this; | |
| 971 | } | |
| 972 | ||
| 973 | constexpr weekday | |
| 974 | operator++(int) noexcept | |
| 975 | { | |
| 976 | auto __ret = *this; | |
| 977 | ++(*this); | |
| 978 | return __ret; | |
| 979 | } | |
| 980 | ||
| 981 | constexpr weekday& | |
| 982 | operator--() noexcept | |
| 983 | { | |
| 984 | *this -= days{1}; | |
| 985 | return *this; | |
| 986 | } | |
| 987 | ||
| 988 | constexpr weekday | |
| 989 | operator--(int) noexcept | |
| 990 | { | |
| 991 | auto __ret = *this; | |
| 992 | --(*this); | |
| 993 | return __ret; | |
| 994 | } | |
| 995 | ||
| 996 | constexpr weekday& | |
| 997 | operator+=(const days& __d) noexcept | |
| 998 | { | |
| 999 | *this = *this + __d; | |
| 1000 | return *this; | |
| 1001 | } | |
| 1002 | ||
| 1003 | constexpr weekday& | |
| 1004 | operator-=(const days& __d) noexcept | |
| 1005 | { | |
| 1006 | *this = *this - __d; | |
| 1007 | return *this; | |
| 1008 | } | |
| 1009 | ||
| 1010 | constexpr unsigned | |
| 1011 | c_encoding() const noexcept | |
| 1012 | { return _M_wd; } | |
| 1013 | ||
| 1014 | constexpr unsigned | |
| 1015 | iso_encoding() const noexcept | |
| 1016 | { return _M_wd == 0u ? 7u : _M_wd; } | |
| 1017 | ||
| 1018 | constexpr bool | |
| 1019 | ok() const noexcept | |
| 1020 | { return _M_wd <= 6; } | |
| 1021 | ||
| 1022 | constexpr weekday_indexed | |
| 1023 | operator[](unsigned __index) const noexcept; | |
| 1024 | ||
| 1025 | constexpr weekday_last | |
| 1026 | operator[](last_spec) const noexcept; | |
| 1027 | ||
| 1028 | friend constexpr bool | |
| 1029 | operator==(const weekday& __x, const weekday& __y) noexcept | |
| 1030 | { return __x._M_wd == __y._M_wd; } | |
| 1031 | ||
| 1032 | friend constexpr weekday | |
| 1033 | operator+(const weekday& __x, const days& __y) noexcept | |
| 1034 | { | |
| 1035 | auto __n = static_cast<long long>(__x._M_wd) + __y.count(); | |
| 1036 | return weekday{__detail::__modulo(__n, 7)}; | |
| 1037 | } | |
| 1038 | ||
| 1039 | friend constexpr weekday | |
| 1040 | operator+(const days& __x, const weekday& __y) noexcept | |
| 1041 | { return __y + __x; } | |
| 1042 | ||
| 1043 | friend constexpr weekday | |
| 1044 | operator-(const weekday& __x, const days& __y) noexcept | |
| 1045 | { return __x + -__y; } | |
| 1046 | ||
| 1047 | friend constexpr days | |
| 1048 | operator-(const weekday& __x, const weekday& __y) noexcept | |
| 1049 | { | |
| f71352c7 CN |
1050 | const auto __n = __x.c_encoding() - __y.c_encoding(); |
| 1051 | return static_cast<int>(__n) >= 0 ? days{__n} : days{__n + 7}; | |
| 03d5044b | 1052 | } |
| 03d5044b PP |
1053 | }; |
| 1054 | ||
| 1055 | inline constexpr weekday Sunday{0}; | |
| 1056 | inline constexpr weekday Monday{1}; | |
| 1057 | inline constexpr weekday Tuesday{2}; | |
| 1058 | inline constexpr weekday Wednesday{3}; | |
| 1059 | inline constexpr weekday Thursday{4}; | |
| 1060 | inline constexpr weekday Friday{5}; | |
| 1061 | inline constexpr weekday Saturday{6}; | |
| 1062 | ||
| 1063 | // WEEKDAY_INDEXED | |
| 1064 | ||
| 1065 | class weekday_indexed | |
| 1066 | { | |
| 1067 | private: | |
| 1068 | chrono::weekday _M_wd; | |
| 1069 | unsigned char _M_index; | |
| 1070 | ||
| 1071 | public: | |
| 1072 | weekday_indexed() = default; | |
| 1073 | ||
| 1074 | constexpr | |
| 1075 | weekday_indexed(const chrono::weekday& __wd, unsigned __index) noexcept | |
| 1076 | : _M_wd(__wd), _M_index(__index) | |
| 1077 | { } | |
| 1078 | ||
| 1079 | constexpr chrono::weekday | |
| 1080 | weekday() const noexcept | |
| 1081 | { return _M_wd; } | |
| 1082 | ||
| 1083 | constexpr unsigned | |
| 1084 | index() const noexcept | |
| 1085 | { return _M_index; }; | |
| 1086 | ||
| 1087 | constexpr bool | |
| 1088 | ok() const noexcept | |
| 1089 | { return _M_wd.ok() && 1 <= _M_index && _M_index <= 5; } | |
| 1090 | ||
| 1091 | friend constexpr bool | |
| 1092 | operator==(const weekday_indexed& __x, const weekday_indexed& __y) noexcept | |
| 1093 | { return __x.weekday() == __y.weekday() && __x.index() == __y.index(); } | |
| 1094 | ||
| 1095 | friend constexpr month_weekday | |
| 1096 | operator/(const month& __m, const weekday_indexed& __wdi) noexcept; | |
| 1097 | ||
| 1098 | friend constexpr month_weekday | |
| 1099 | operator/(int __m, const weekday_indexed& __wdi) noexcept; | |
| 1100 | ||
| 1101 | friend constexpr month_weekday | |
| 1102 | operator/(const weekday_indexed& __wdi, const month& __m) noexcept; | |
| 1103 | ||
| 1104 | friend constexpr month_weekday | |
| 1105 | operator/(const weekday_indexed& __wdi, int __m) noexcept; | |
| 1106 | ||
| 1107 | friend constexpr year_month_weekday | |
| 1108 | operator/(const year_month& __ym, const weekday_indexed& __wdi) noexcept; | |
| 03d5044b PP |
1109 | }; |
| 1110 | ||
| 1111 | constexpr weekday_indexed | |
| 1112 | weekday::operator[](unsigned __index) const noexcept | |
| 1113 | { return {*this, __index}; } | |
| 1114 | ||
| 1115 | // WEEKDAY_LAST | |
| 1116 | ||
| 1117 | class weekday_last | |
| 1118 | { | |
| 1119 | private: | |
| 1120 | chrono::weekday _M_wd; | |
| 1121 | ||
| 1122 | public: | |
| 1123 | explicit constexpr | |
| 1124 | weekday_last(const chrono::weekday& __wd) noexcept | |
| 1125 | : _M_wd{__wd} | |
| 1126 | { } | |
| 1127 | ||
| 1128 | constexpr chrono::weekday | |
| 1129 | weekday() const noexcept | |
| 1130 | { return _M_wd; } | |
| 1131 | ||
| 1132 | constexpr bool | |
| 1133 | ok() const noexcept | |
| 1134 | { return _M_wd.ok(); } | |
| 1135 | ||
| 1136 | friend constexpr bool | |
| 1137 | operator==(const weekday_last& __x, const weekday_last& __y) noexcept | |
| 1138 | { return __x.weekday() == __y.weekday(); } | |
| 1139 | ||
| 1140 | friend constexpr month_weekday_last | |
| 1141 | operator/(int __m, const weekday_last& __wdl) noexcept; | |
| 1142 | ||
| 1143 | friend constexpr month_weekday_last | |
| 1144 | operator/(const weekday_last& __wdl, int __m) noexcept; | |
| 1145 | ||
| 1146 | friend constexpr year_month_weekday_last | |
| 1147 | operator/(const year_month& __ym, const weekday_last& __wdl) noexcept; | |
| 03d5044b PP |
1148 | }; |
| 1149 | ||
| 1150 | constexpr weekday_last | |
| 1151 | weekday::operator[](last_spec) const noexcept | |
| 1152 | { return weekday_last{*this}; } | |
| 1153 | ||
| 1154 | // MONTH_DAY | |
| 1155 | ||
| 1156 | class month_day | |
| 1157 | { | |
| 1158 | private: | |
| 1159 | chrono::month _M_m; | |
| 1160 | chrono::day _M_d; | |
| 1161 | ||
| 1162 | public: | |
| 1163 | month_day() = default; | |
| 1164 | ||
| 1165 | constexpr | |
| 1166 | month_day(const chrono::month& __m, const chrono::day& __d) noexcept | |
| 1167 | : _M_m{__m}, _M_d{__d} | |
| 1168 | { } | |
| 1169 | ||
| 1170 | constexpr chrono::month | |
| 1171 | month() const noexcept | |
| 1172 | { return _M_m; } | |
| 1173 | ||
| 1174 | constexpr chrono::day | |
| 1175 | day() const noexcept | |
| 1176 | { return _M_d; } | |
| 1177 | ||
| 1178 | constexpr bool | |
| 1179 | ok() const noexcept | |
| 1180 | { | |
| 1181 | return _M_m.ok() | |
| 1182 | && 1u <= unsigned(_M_d) | |
| 1183 | && unsigned(_M_d) <= __detail::__days_per_month[unsigned(_M_m) - 1]; | |
| 1184 | } | |
| 1185 | ||
| 1186 | friend constexpr bool | |
| 1187 | operator==(const month_day& __x, const month_day& __y) noexcept | |
| 1188 | { return __x.month() == __y.month() && __x.day() == __y.day(); } | |
| 1189 | ||
| 1190 | friend constexpr strong_ordering | |
| 1191 | operator<=>(const month_day& __x, const month_day& __y) noexcept | |
| 1192 | = default; | |
| 1193 | ||
| 1194 | friend constexpr month_day | |
| 1195 | operator/(const chrono::month& __m, const chrono::day& __d) noexcept | |
| 1196 | { return {__m, __d}; } | |
| 1197 | ||
| 1198 | friend constexpr month_day | |
| 1199 | operator/(const chrono::month& __m, int __d) noexcept | |
| 1200 | { return {__m, chrono::day(unsigned(__d))}; } | |
| 1201 | ||
| 1202 | friend constexpr month_day | |
| 1203 | operator/(int __m, const chrono::day& __d) noexcept | |
| 1204 | { return {chrono::month(unsigned(__m)), __d}; } | |
| 1205 | ||
| 1206 | friend constexpr month_day | |
| 1207 | operator/(const chrono::day& __d, const chrono::month& __m) noexcept | |
| 1208 | { return {__m, __d}; } | |
| 1209 | ||
| 1210 | friend constexpr month_day | |
| 1211 | operator/(const chrono::day& __d, int __m) noexcept | |
| 1212 | { return {chrono::month(unsigned(__m)), __d}; } | |
| 1213 | ||
| 1214 | friend constexpr year_month_day | |
| 1215 | operator/(int __y, const month_day& __md) noexcept; | |
| 1216 | ||
| 1217 | friend constexpr year_month_day | |
| 1218 | operator/(const month_day& __md, int __y) noexcept; | |
| 03d5044b PP |
1219 | }; |
| 1220 | ||
| 1221 | // MONTH_DAY_LAST | |
| 1222 | ||
| 1223 | class month_day_last | |
| 1224 | { | |
| 1225 | private: | |
| 1226 | chrono::month _M_m; | |
| 1227 | ||
| 1228 | public: | |
| 1229 | explicit constexpr | |
| 1230 | month_day_last(const chrono::month& __m) noexcept | |
| 1231 | : _M_m{__m} | |
| 1232 | { } | |
| 1233 | ||
| 1234 | constexpr chrono::month | |
| 1235 | month() const noexcept | |
| 1236 | { return _M_m; } | |
| 1237 | ||
| 1238 | constexpr bool | |
| 1239 | ok() const noexcept | |
| 1240 | { return _M_m.ok(); } | |
| 1241 | ||
| 1242 | friend constexpr bool | |
| 1243 | operator==(const month_day_last& __x, const month_day_last& __y) noexcept | |
| 1244 | { return __x.month() == __y.month(); } | |
| 1245 | ||
| 1246 | friend constexpr strong_ordering | |
| 1247 | operator<=>(const month_day_last& __x, const month_day_last& __y) noexcept | |
| 1248 | = default; | |
| 1249 | ||
| 1250 | friend constexpr month_day_last | |
| 1251 | operator/(const chrono::month& __m, last_spec) noexcept | |
| 1252 | { return month_day_last{__m}; } | |
| 1253 | ||
| 1254 | friend constexpr month_day_last | |
| 1255 | operator/(int __m, last_spec) noexcept | |
| 1256 | { return chrono::month(unsigned(__m)) / last; } | |
| 1257 | ||
| 1258 | friend constexpr month_day_last | |
| 1259 | operator/(last_spec, const chrono::month& __m) noexcept | |
| 1260 | { return __m / last; } | |
| 1261 | ||
| 1262 | friend constexpr month_day_last | |
| 1263 | operator/(last_spec, int __m) noexcept | |
| 1264 | { return __m / last; } | |
| 1265 | ||
| 1266 | friend constexpr year_month_day_last | |
| 1267 | operator/(int __y, const month_day_last& __mdl) noexcept; | |
| 1268 | ||
| 1269 | friend constexpr year_month_day_last | |
| 1270 | operator/(const month_day_last& __mdl, int __y) noexcept; | |
| 03d5044b PP |
1271 | }; |
| 1272 | ||
| 1273 | // MONTH_WEEKDAY | |
| 1274 | ||
| 1275 | class month_weekday | |
| 1276 | { | |
| 1277 | private: | |
| 1278 | chrono::month _M_m; | |
| 1279 | chrono::weekday_indexed _M_wdi; | |
| 1280 | ||
| 1281 | public: | |
| 1282 | constexpr | |
| 1283 | month_weekday(const chrono::month& __m, | |
| 1284 | const chrono::weekday_indexed& __wdi) noexcept | |
| 1285 | : _M_m{__m}, _M_wdi{__wdi} | |
| 1286 | { } | |
| 1287 | ||
| 1288 | constexpr chrono::month | |
| 1289 | month() const noexcept | |
| 1290 | { return _M_m; } | |
| 1291 | ||
| 1292 | constexpr chrono::weekday_indexed | |
| 1293 | weekday_indexed() const noexcept | |
| 1294 | { return _M_wdi; } | |
| 1295 | ||
| 1296 | constexpr bool | |
| 1297 | ok() const noexcept | |
| 1298 | { return _M_m.ok() && _M_wdi.ok(); } | |
| 1299 | ||
| 1300 | friend constexpr bool | |
| 1301 | operator==(const month_weekday& __x, const month_weekday& __y) noexcept | |
| 1302 | { | |
| 1303 | return __x.month() == __y.month() | |
| 1304 | && __x.weekday_indexed() == __y.weekday_indexed(); | |
| 1305 | } | |
| 1306 | ||
| 1307 | friend constexpr month_weekday | |
| 1308 | operator/(const chrono::month& __m, | |
| 1309 | const chrono::weekday_indexed& __wdi) noexcept | |
| 1310 | { return {__m, __wdi}; } | |
| 1311 | ||
| 1312 | friend constexpr month_weekday | |
| 1313 | operator/(int __m, const chrono::weekday_indexed& __wdi) noexcept | |
| 1314 | { return chrono::month(unsigned(__m)) / __wdi; } | |
| 1315 | ||
| 1316 | friend constexpr month_weekday | |
| 1317 | operator/(const chrono::weekday_indexed& __wdi, | |
| 1318 | const chrono::month& __m) noexcept | |
| 1319 | { return __m / __wdi; } | |
| 1320 | ||
| 1321 | friend constexpr month_weekday | |
| 1322 | operator/(const chrono::weekday_indexed& __wdi, int __m) noexcept | |
| 1323 | { return __m / __wdi; } | |
| 1324 | ||
| 1325 | friend constexpr year_month_weekday | |
| 1326 | operator/(int __y, const month_weekday& __mwd) noexcept; | |
| 1327 | ||
| 1328 | friend constexpr year_month_weekday | |
| 1329 | operator/(const month_weekday& __mwd, int __y) noexcept; | |
| 03d5044b PP |
1330 | }; |
| 1331 | ||
| 1332 | // MONTH_WEEKDAY_LAST | |
| 1333 | ||
| 1334 | class month_weekday_last | |
| 1335 | { | |
| 1336 | private: | |
| 1337 | chrono::month _M_m; | |
| 1338 | chrono::weekday_last _M_wdl; | |
| 1339 | ||
| 1340 | public: | |
| 1341 | constexpr | |
| 1342 | month_weekday_last(const chrono::month& __m, | |
| 1343 | const chrono::weekday_last& __wdl) noexcept | |
| 1344 | :_M_m{__m}, _M_wdl{__wdl} | |
| 1345 | { } | |
| 1346 | ||
| 1347 | constexpr chrono::month | |
| 1348 | month() const noexcept | |
| 1349 | { return _M_m; } | |
| 1350 | ||
| 1351 | constexpr chrono::weekday_last | |
| 1352 | weekday_last() const noexcept | |
| 1353 | { return _M_wdl; } | |
| 1354 | ||
| 1355 | constexpr bool | |
| 1356 | ok() const noexcept | |
| 1357 | { return _M_m.ok() && _M_wdl.ok(); } | |
| 1358 | ||
| 1359 | friend constexpr bool | |
| 1360 | operator==(const month_weekday_last& __x, | |
| 1361 | const month_weekday_last& __y) noexcept | |
| 1362 | { | |
| 1363 | return __x.month() == __y.month() | |
| 1364 | && __x.weekday_last() == __y.weekday_last(); | |
| 1365 | } | |
| 1366 | ||
| 1367 | friend constexpr month_weekday_last | |
| 1368 | operator/(const chrono::month& __m, | |
| 1369 | const chrono::weekday_last& __wdl) noexcept | |
| 1370 | { return {__m, __wdl}; } | |
| 1371 | ||
| 1372 | friend constexpr month_weekday_last | |
| 1373 | operator/(int __m, const chrono::weekday_last& __wdl) noexcept | |
| 1374 | { return chrono::month(unsigned(__m)) / __wdl; } | |
| 1375 | ||
| 1376 | friend constexpr month_weekday_last | |
| 1377 | operator/(const chrono::weekday_last& __wdl, | |
| 1378 | const chrono::month& __m) noexcept | |
| 1379 | { return __m / __wdl; } | |
| 1380 | ||
| 1381 | friend constexpr month_weekday_last | |
| 1382 | operator/(const chrono::weekday_last& __wdl, int __m) noexcept | |
| 1383 | { return chrono::month(unsigned(__m)) / __wdl; } | |
| 1384 | ||
| 1385 | friend constexpr year_month_weekday_last | |
| 1386 | operator/(int __y, const month_weekday_last& __mwdl) noexcept; | |
| 1387 | ||
| 1388 | friend constexpr year_month_weekday_last | |
| 1389 | operator/(const month_weekday_last& __mwdl, int __y) noexcept; | |
| 03d5044b PP |
1390 | }; |
| 1391 | ||
| 1392 | // YEAR_MONTH | |
| 1393 | ||
| 7b743c67 PP |
1394 | namespace __detail |
| 1395 | { | |
| 1396 | // [time.cal.ym], [time.cal.ymd], etc constrain the 'months'-based | |
| 1397 | // addition/subtraction operator overloads like so: | |
| 1398 | // | |
| 1399 | // Constraints: if the argument supplied by the caller for the months | |
| 1400 | // parameter is convertible to years, its implicit conversion sequence | |
| 1401 | // to years is worse than its implicit conversion sequence to months. | |
| 1402 | // | |
| 1403 | // We realize this constraint by templatizing the 'months'-based | |
| 1404 | // overloads (using a dummy defaulted template parameter), so that | |
| 1405 | // overload resolution doesn't select the 'months'-based overload unless | |
| 1406 | // the implicit conversion sequence to 'months' is better than that to | |
| 1407 | // 'years'. | |
| 1408 | using __months_years_conversion_disambiguator = void; | |
| 1409 | } | |
| 1410 | ||
| 03d5044b PP |
1411 | class year_month |
| 1412 | { | |
| 1413 | private: | |
| 1414 | chrono::year _M_y; | |
| 1415 | chrono::month _M_m; | |
| 1416 | ||
| 1417 | public: | |
| 1418 | year_month() = default; | |
| 1419 | ||
| 1420 | constexpr | |
| 1421 | year_month(const chrono::year& __y, const chrono::month& __m) noexcept | |
| 1422 | : _M_y{__y}, _M_m{__m} | |
| 1423 | { } | |
| 1424 | ||
| 1425 | constexpr chrono::year | |
| 1426 | year() const noexcept | |
| 1427 | { return _M_y; } | |
| 1428 | ||
| 1429 | constexpr chrono::month | |
| 1430 | month() const noexcept | |
| 1431 | { return _M_m; } | |
| 1432 | ||
| 7b743c67 PP |
1433 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 1434 | constexpr year_month& | |
| 1435 | operator+=(const months& __dm) noexcept | |
| 1436 | { | |
| 1437 | *this = *this + __dm; | |
| 1438 | return *this; | |
| 1439 | } | |
| 03d5044b | 1440 | |
| 7b743c67 PP |
1441 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 1442 | constexpr year_month& | |
| 1443 | operator-=(const months& __dm) noexcept | |
| 1444 | { | |
| 1445 | *this = *this - __dm; | |
| 1446 | return *this; | |
| 1447 | } | |
| 03d5044b PP |
1448 | |
| 1449 | constexpr year_month& | |
| 1450 | operator+=(const years& __dy) noexcept | |
| 1451 | { | |
| 1452 | *this = *this + __dy; | |
| 1453 | return *this; | |
| 1454 | } | |
| 1455 | ||
| 1456 | constexpr year_month& | |
| 1457 | operator-=(const years& __dy) noexcept | |
| 1458 | { | |
| 1459 | *this = *this - __dy; | |
| 1460 | return *this; | |
| 1461 | } | |
| 1462 | ||
| 1463 | constexpr bool | |
| 1464 | ok() const noexcept | |
| 1465 | { return _M_y.ok() && _M_m.ok(); } | |
| 1466 | ||
| 1467 | friend constexpr bool | |
| 1468 | operator==(const year_month& __x, const year_month& __y) noexcept | |
| 1469 | { return __x.year() == __y.year() && __x.month() == __y.month(); } | |
| 1470 | ||
| 1471 | friend constexpr strong_ordering | |
| 1472 | operator<=>(const year_month& __x, const year_month& __y) noexcept | |
| 1473 | = default; | |
| 1474 | ||
| 7b743c67 PP |
1475 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 1476 | friend constexpr year_month | |
| 1477 | operator+(const year_month& __ym, const months& __dm) noexcept | |
| 1478 | { | |
| 1479 | // TODO: Optimize? | |
| 1480 | auto __m = __ym.month() + __dm; | |
| 71e97161 | 1481 | auto __i = int(unsigned(__ym.month())) - 1 + __dm.count(); |
| 7b743c67 PP |
1482 | auto __y = (__i < 0 |
| 1483 | ? __ym.year() + years{(__i - 11) / 12} | |
| 1484 | : __ym.year() + years{__i / 12}); | |
| 1485 | return __y / __m; | |
| 1486 | } | |
| 03d5044b | 1487 | |
| 7b743c67 PP |
1488 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 1489 | friend constexpr year_month | |
| 1490 | operator+(const months& __dm, const year_month& __ym) noexcept | |
| 1491 | { return __ym + __dm; } | |
| 03d5044b | 1492 | |
| 7b743c67 PP |
1493 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 1494 | friend constexpr year_month | |
| 1495 | operator-(const year_month& __ym, const months& __dm) noexcept | |
| 1496 | { return __ym + -__dm; } | |
| 03d5044b PP |
1497 | |
| 1498 | friend constexpr months | |
| 1499 | operator-(const year_month& __x, const year_month& __y) noexcept | |
| 1500 | { | |
| 1501 | return (__x.year() - __y.year() | |
| 1502 | + months{static_cast<int>(unsigned{__x.month()}) | |
| 1503 | - static_cast<int>(unsigned{__y.month()})}); | |
| 1504 | } | |
| 1505 | ||
| 1506 | friend constexpr year_month | |
| 1507 | operator+(const year_month& __ym, const years& __dy) noexcept | |
| 1508 | { return (__ym.year() + __dy) / __ym.month(); } | |
| 1509 | ||
| 1510 | friend constexpr year_month | |
| 1511 | operator+(const years& __dy, const year_month& __ym) noexcept | |
| 1512 | { return __ym + __dy; } | |
| 1513 | ||
| 1514 | friend constexpr year_month | |
| 1515 | operator-(const year_month& __ym, const years& __dy) noexcept | |
| 1516 | { return __ym + -__dy; } | |
| 1517 | ||
| 1518 | friend constexpr year_month | |
| 1519 | operator/(const chrono::year& __y, const chrono::month& __m) noexcept | |
| 1520 | { return {__y, __m}; } | |
| 1521 | ||
| 1522 | friend constexpr year_month | |
| 1523 | operator/(const chrono::year& __y, int __m) noexcept | |
| 1524 | { return {__y, chrono::month(unsigned(__m))}; } | |
| 1525 | ||
| 1526 | friend constexpr year_month_day | |
| 1527 | operator/(const year_month& __ym, int __d) noexcept; | |
| 1528 | ||
| 1529 | friend constexpr year_month_day_last | |
| 1530 | operator/(const year_month& __ym, last_spec) noexcept; | |
| 03d5044b PP |
1531 | }; |
| 1532 | ||
| 1533 | // YEAR_MONTH_DAY | |
| 1534 | ||
| 1535 | class year_month_day | |
| 1536 | { | |
| 1537 | private: | |
| 1538 | chrono::year _M_y; | |
| 1539 | chrono::month _M_m; | |
| 1540 | chrono::day _M_d; | |
| 1541 | ||
| 1542 | static constexpr year_month_day _S_from_days(const days& __dp) noexcept; | |
| 1543 | ||
| 1544 | constexpr days _M_days_since_epoch() const noexcept; | |
| 1545 | ||
| 1546 | public: | |
| 1547 | year_month_day() = default; | |
| 1548 | ||
| 1549 | constexpr | |
| 1550 | year_month_day(const chrono::year& __y, const chrono::month& __m, | |
| 1551 | const chrono::day& __d) noexcept | |
| 1552 | : _M_y{__y}, _M_m{__m}, _M_d{__d} | |
| 1553 | { } | |
| 1554 | ||
| 1555 | constexpr | |
| 1556 | year_month_day(const year_month_day_last& __ymdl) noexcept; | |
| 1557 | ||
| 1558 | constexpr | |
| 1559 | year_month_day(const sys_days& __dp) noexcept | |
| 1560 | : year_month_day(_S_from_days(__dp.time_since_epoch())) | |
| 1561 | { } | |
| 1562 | ||
| 1563 | explicit constexpr | |
| 1564 | year_month_day(const local_days& __dp) noexcept | |
| 1565 | : year_month_day(sys_days{__dp.time_since_epoch()}) | |
| 1566 | { } | |
| 1567 | ||
| 7b743c67 PP |
1568 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 1569 | constexpr year_month_day& | |
| 1570 | operator+=(const months& __m) noexcept | |
| 1571 | { | |
| 1572 | *this = *this + __m; | |
| 1573 | return *this; | |
| 1574 | } | |
| 03d5044b | 1575 | |
| 7b743c67 PP |
1576 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 1577 | constexpr year_month_day& | |
| 1578 | operator-=(const months& __m) noexcept | |
| 1579 | { | |
| 1580 | *this = *this - __m; | |
| 1581 | return *this; | |
| 1582 | } | |
| 03d5044b PP |
1583 | |
| 1584 | constexpr year_month_day& | |
| 1585 | operator+=(const years& __y) noexcept | |
| 1586 | { | |
| 1587 | *this = *this + __y; | |
| 1588 | return *this; | |
| 1589 | } | |
| 1590 | ||
| 1591 | constexpr year_month_day& | |
| 1592 | operator-=(const years& __y) noexcept | |
| 1593 | { | |
| 1594 | *this = *this - __y; | |
| 1595 | return *this; | |
| 1596 | } | |
| 1597 | ||
| 1598 | constexpr chrono::year | |
| 1599 | year() const noexcept | |
| 1600 | { return _M_y; } | |
| 1601 | ||
| 1602 | constexpr chrono::month | |
| 1603 | month() const noexcept | |
| 1604 | { return _M_m; } | |
| 1605 | ||
| 1606 | constexpr chrono::day | |
| 1607 | day() const noexcept | |
| 1608 | { return _M_d; } | |
| 1609 | ||
| 1610 | constexpr | |
| 1611 | operator sys_days() const noexcept | |
| 1612 | { return sys_days{_M_days_since_epoch()}; } | |
| 1613 | ||
| 1614 | explicit constexpr | |
| 1615 | operator local_days() const noexcept | |
| 1616 | { return local_days{sys_days{*this}.time_since_epoch()}; } | |
| 1617 | ||
| 1618 | constexpr bool ok() const noexcept; | |
| 1619 | ||
| 1620 | friend constexpr bool | |
| 1621 | operator==(const year_month_day& __x, const year_month_day& __y) noexcept | |
| 1622 | { | |
| 1623 | return __x.year() == __y.year() | |
| 1624 | && __x.month() == __y.month() | |
| 1625 | && __x.day() == __y.day(); | |
| 1626 | } | |
| 1627 | ||
| 1628 | friend constexpr strong_ordering | |
| 1629 | operator<=>(const year_month_day& __x, const year_month_day& __y) noexcept | |
| 1630 | = default; | |
| 1631 | ||
| 7b743c67 PP |
1632 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 1633 | friend constexpr year_month_day | |
| 1634 | operator+(const year_month_day& __ymd, const months& __dm) noexcept | |
| 1635 | { return (__ymd.year() / __ymd.month() + __dm) / __ymd.day(); } | |
| 03d5044b | 1636 | |
| 7b743c67 PP |
1637 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 1638 | friend constexpr year_month_day | |
| 1639 | operator+(const months& __dm, const year_month_day& __ymd) noexcept | |
| 1640 | { return __ymd + __dm; } | |
| 03d5044b PP |
1641 | |
| 1642 | friend constexpr year_month_day | |
| 1643 | operator+(const year_month_day& __ymd, const years& __dy) noexcept | |
| 1644 | { return (__ymd.year() + __dy) / __ymd.month() / __ymd.day(); } | |
| 1645 | ||
| 1646 | friend constexpr year_month_day | |
| 1647 | operator+(const years& __dy, const year_month_day& __ymd) noexcept | |
| 1648 | { return __ymd + __dy; } | |
| 1649 | ||
| 7b743c67 PP |
1650 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 1651 | friend constexpr year_month_day | |
| 1652 | operator-(const year_month_day& __ymd, const months& __dm) noexcept | |
| 1653 | { return __ymd + -__dm; } | |
| 03d5044b PP |
1654 | |
| 1655 | friend constexpr year_month_day | |
| 1656 | operator-(const year_month_day& __ymd, const years& __dy) noexcept | |
| 1657 | { return __ymd + -__dy; } | |
| 1658 | ||
| 1659 | friend constexpr year_month_day | |
| 1660 | operator/(const year_month& __ym, const chrono::day& __d) noexcept | |
| 1661 | { return {__ym.year(), __ym.month(), __d}; } | |
| 1662 | ||
| 1663 | friend constexpr year_month_day | |
| 1664 | operator/(const year_month& __ym, int __d) noexcept | |
| 1665 | { return __ym / chrono::day{unsigned(__d)}; } | |
| 1666 | ||
| 1667 | friend constexpr year_month_day | |
| 1668 | operator/(const chrono::year& __y, const month_day& __md) noexcept | |
| 1669 | { return __y / __md.month() / __md.day(); } | |
| 1670 | ||
| 1671 | friend constexpr year_month_day | |
| 1672 | operator/(int __y, const month_day& __md) noexcept | |
| 1673 | { return chrono::year{__y} / __md; } | |
| 1674 | ||
| 1675 | friend constexpr year_month_day | |
| 1676 | operator/(const month_day& __md, const chrono::year& __y) noexcept | |
| 1677 | { return __y / __md; } | |
| 1678 | ||
| 1679 | friend constexpr year_month_day | |
| 1680 | operator/(const month_day& __md, int __y) noexcept | |
| 1681 | { return chrono::year(__y) / __md; } | |
| 03d5044b PP |
1682 | }; |
| 1683 | ||
| 3dfd5493 CN |
1684 | // Construct from days since 1970/01/01. |
| 1685 | // Proposition 6.3 of Neri and Schneider, | |
| 1686 | // "Euclidean Affine Functions and Applications to Calendar Algorithms". | |
| 1687 | // https://arxiv.org/abs/2102.06959 | |
| 03d5044b PP |
1688 | constexpr year_month_day |
| 1689 | year_month_day::_S_from_days(const days& __dp) noexcept | |
| 1690 | { | |
| 3dfd5493 CN |
1691 | constexpr auto __z2 = static_cast<uint32_t>(-1468000); |
| 1692 | constexpr auto __r2_e3 = static_cast<uint32_t>(536895458); | |
| 1693 | ||
| a47cec4c | 1694 | const auto __r0 = static_cast<uint32_t>(__dp.count()) + __r2_e3; |
| 3dfd5493 CN |
1695 | |
| 1696 | const auto __n1 = 4 * __r0 + 3; | |
| 1697 | const auto __q1 = __n1 / 146097; | |
| 1698 | const auto __r1 = __n1 % 146097 / 4; | |
| 1699 | ||
| 1700 | constexpr auto __p32 = static_cast<uint64_t>(1) << 32; | |
| 1701 | const auto __n2 = 4 * __r1 + 3; | |
| 1702 | const auto __u2 = static_cast<uint64_t>(2939745) * __n2; | |
| 1703 | const auto __q2 = static_cast<uint32_t>(__u2 / __p32); | |
| 1704 | const auto __r2 = static_cast<uint32_t>(__u2 % __p32) / 2939745 / 4; | |
| 1705 | ||
| 1706 | constexpr auto __p16 = static_cast<uint32_t>(1) << 16; | |
| 1707 | const auto __n3 = 2141 * __r2 + 197913; | |
| 1708 | const auto __q3 = __n3 / __p16; | |
| 1709 | const auto __r3 = __n3 % __p16 / 2141; | |
| 1710 | ||
| 1711 | const auto __y0 = 100 * __q1 + __q2; | |
| 1712 | const auto __m0 = __q3; | |
| 1713 | const auto __d0 = __r3; | |
| 1714 | ||
| 1715 | const auto __j = __r2 >= 306; | |
| 1716 | const auto __y1 = __y0 + __j; | |
| 1717 | const auto __m1 = __j ? __m0 - 12 : __m0; | |
| 1718 | const auto __d1 = __d0 + 1; | |
| 1719 | ||
| 75c74a83 JW |
1720 | return year_month_day{chrono::year{static_cast<int>(__y1 + __z2)}, |
| 1721 | chrono::month{__m1}, chrono::day{__d1}}; | |
| 03d5044b PP |
1722 | } |
| 1723 | ||
| 97d6161f CN |
1724 | // Days since 1970/01/01. |
| 1725 | // Proposition 6.2 of Neri and Schneider, | |
| 1726 | // "Euclidean Affine Functions and Applications to Calendar Algorithms". | |
| 1727 | // https://arxiv.org/abs/2102.06959 | |
| 03d5044b PP |
1728 | constexpr days |
| 1729 | year_month_day::_M_days_since_epoch() const noexcept | |
| 1730 | { | |
| 97d6161f CN |
1731 | auto constexpr __z2 = static_cast<uint32_t>(-1468000); |
| 1732 | auto constexpr __r2_e3 = static_cast<uint32_t>(536895458); | |
| 1733 | ||
| 1734 | const auto __y1 = static_cast<uint32_t>(static_cast<int>(_M_y)) - __z2; | |
| 699672d4 JW |
1735 | const auto __m1 = static_cast<uint32_t>(static_cast<unsigned>(_M_m)); |
| 1736 | const auto __d1 = static_cast<uint32_t>(static_cast<unsigned>(_M_d)); | |
| 97d6161f CN |
1737 | |
| 1738 | const auto __j = static_cast<uint32_t>(__m1 < 3); | |
| 1739 | const auto __y0 = __y1 - __j; | |
| 1740 | const auto __m0 = __j ? __m1 + 12 : __m1; | |
| 1741 | const auto __d0 = __d1 - 1; | |
| 1742 | ||
| 1743 | const auto __q1 = __y0 / 100; | |
| 1744 | const auto __yc = 1461 * __y0 / 4 - __q1 + __q1 / 4; | |
| 1745 | const auto __mc = (979 *__m0 - 2919) / 32; | |
| 1746 | const auto __dc = __d0; | |
| 1747 | ||
| 1748 | return days{static_cast<int32_t>(__yc + __mc + __dc - __r2_e3)}; | |
| 03d5044b PP |
1749 | } |
| 1750 | ||
| 1751 | // YEAR_MONTH_DAY_LAST | |
| 1752 | ||
| 1753 | class year_month_day_last | |
| 1754 | { | |
| 1755 | private: | |
| 1756 | chrono::year _M_y; | |
| 1757 | chrono::month_day_last _M_mdl; | |
| 1758 | ||
| 1759 | public: | |
| 1760 | constexpr | |
| 1761 | year_month_day_last(const chrono::year& __y, | |
| 1762 | const chrono::month_day_last& __mdl) noexcept | |
| 1763 | : _M_y{__y}, _M_mdl{__mdl} | |
| 1764 | { } | |
| 1765 | ||
| 7b743c67 PP |
1766 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 1767 | constexpr year_month_day_last& | |
| 1768 | operator+=(const months& __m) noexcept | |
| 1769 | { | |
| 1770 | *this = *this + __m; | |
| 1771 | return *this; | |
| 1772 | } | |
| 03d5044b | 1773 | |
| 7b743c67 PP |
1774 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 1775 | constexpr year_month_day_last& | |
| 1776 | operator-=(const months& __m) noexcept | |
| 1777 | { | |
| 1778 | *this = *this - __m; | |
| 1779 | return *this; | |
| 1780 | } | |
| 03d5044b PP |
1781 | |
| 1782 | constexpr year_month_day_last& | |
| 1783 | operator+=(const years& __y) noexcept | |
| 1784 | { | |
| 1785 | *this = *this + __y; | |
| 1786 | return *this; | |
| 1787 | } | |
| 1788 | ||
| 1789 | constexpr year_month_day_last& | |
| 1790 | operator-=(const years& __y) noexcept | |
| 1791 | { | |
| 1792 | *this = *this - __y; | |
| 1793 | return *this; | |
| 1794 | } | |
| 1795 | ||
| 1796 | constexpr chrono::year | |
| 1797 | year() const noexcept | |
| 1798 | { return _M_y; } | |
| 1799 | ||
| 1800 | constexpr chrono::month | |
| 1801 | month() const noexcept | |
| 1802 | { return _M_mdl.month(); } | |
| 1803 | ||
| 1804 | constexpr chrono::month_day_last | |
| 1805 | month_day_last() const noexcept | |
| 1806 | { return _M_mdl; } | |
| 1807 | ||
| 1808 | // Return A day representing the last day of this year, month pair. | |
| 1809 | constexpr chrono::day | |
| 1810 | day() const noexcept | |
| 1811 | { | |
| 8265ab07 CN |
1812 | const auto __m = static_cast<unsigned>(month()); |
| 1813 | ||
| b0115354 CN |
1814 | // The result is unspecified if __m < 1 or __m > 12. Hence, assume |
| 1815 | // 1 <= __m <= 12. For __m != 2, day() == 30 or day() == 31 or, in | |
| 1816 | // other words, day () == 30 | b, where b is in {0, 1}. | |
| 8265ab07 | 1817 | |
| b0115354 CN |
1818 | // If __m in {1, 3, 4, 5, 6, 7}, then b is 1 if, and only if, __m is |
| 1819 | // odd. Hence, b = __m & 1 = (__m ^ 0) & 1. | |
| 8265ab07 | 1820 | |
| b0115354 CN |
1821 | // If __m in {8, 9, 10, 11, 12}, then b is 1 if, and only if, __m is |
| 1822 | // even. Hence, b = (__m ^ 1) & 1. | |
| 8265ab07 CN |
1823 | |
| 1824 | // Therefore, b = (__m ^ c) & 1, where c = 0, if __m < 8, or c = 1 if | |
| 1825 | // __m >= 8, that is, c = __m >> 3. | |
| 1826 | ||
| b0115354 CN |
1827 | // Since 30 = (11110)_2 and __m <= 31 = (11111)_2, the "& 1" in b's |
| 1828 | // calculation is unnecessary. | |
| 1829 | ||
| 1830 | // The performance of this implementation does not depend on look-up | |
| 1831 | // tables being on the L1 cache. | |
| 1832 | return chrono::day{__m != 2 ? (__m ^ (__m >> 3)) | 30 | |
| 1833 | : _M_y.is_leap() ? 29 : 28}; | |
| 03d5044b PP |
1834 | } |
| 1835 | ||
| 1836 | constexpr | |
| 1837 | operator sys_days() const noexcept | |
| 1838 | { return sys_days{year() / month() / day()}; } | |
| 1839 | ||
| 1840 | explicit constexpr | |
| 1841 | operator local_days() const noexcept | |
| 1842 | { return local_days{sys_days{*this}.time_since_epoch()}; } | |
| 1843 | ||
| 1844 | constexpr bool | |
| 1845 | ok() const noexcept | |
| 1846 | { return _M_y.ok() && _M_mdl.ok(); } | |
| 1847 | ||
| 1848 | friend constexpr bool | |
| 1849 | operator==(const year_month_day_last& __x, | |
| 1850 | const year_month_day_last& __y) noexcept | |
| 1851 | { | |
| 1852 | return __x.year() == __y.year() | |
| 1853 | && __x.month_day_last() == __y.month_day_last(); | |
| 1854 | } | |
| 1855 | ||
| 1856 | friend constexpr strong_ordering | |
| 1857 | operator<=>(const year_month_day_last& __x, | |
| 1858 | const year_month_day_last& __y) noexcept | |
| 1859 | = default; | |
| 1860 | ||
| 7b743c67 PP |
1861 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 1862 | friend constexpr year_month_day_last | |
| 1863 | operator+(const year_month_day_last& __ymdl, | |
| 1864 | const months& __dm) noexcept | |
| 1865 | { return (__ymdl.year() / __ymdl.month() + __dm) / last; } | |
| 03d5044b | 1866 | |
| 7b743c67 PP |
1867 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 1868 | friend constexpr year_month_day_last | |
| 1869 | operator+(const months& __dm, | |
| 1870 | const year_month_day_last& __ymdl) noexcept | |
| 1871 | { return __ymdl + __dm; } | |
| 03d5044b | 1872 | |
| 7b743c67 PP |
1873 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 1874 | friend constexpr year_month_day_last | |
| 1875 | operator-(const year_month_day_last& __ymdl, | |
| 1876 | const months& __dm) noexcept | |
| 1877 | { return __ymdl + -__dm; } | |
| 03d5044b PP |
1878 | |
| 1879 | friend constexpr year_month_day_last | |
| 1880 | operator+(const year_month_day_last& __ymdl, | |
| 1881 | const years& __dy) noexcept | |
| 1882 | { return {__ymdl.year() + __dy, __ymdl.month_day_last()}; } | |
| 1883 | ||
| 1884 | friend constexpr year_month_day_last | |
| 1885 | operator+(const years& __dy, | |
| 1886 | const year_month_day_last& __ymdl) noexcept | |
| 1887 | { return __ymdl + __dy; } | |
| 1888 | ||
| 1889 | friend constexpr year_month_day_last | |
| 1890 | operator-(const year_month_day_last& __ymdl, | |
| 1891 | const years& __dy) noexcept | |
| 1892 | { return __ymdl + -__dy; } | |
| 1893 | ||
| 1894 | friend constexpr year_month_day_last | |
| 1895 | operator/(const year_month& __ym, last_spec) noexcept | |
| 1896 | { return {__ym.year(), chrono::month_day_last{__ym.month()}}; } | |
| 1897 | ||
| 1898 | friend constexpr year_month_day_last | |
| 1899 | operator/(const chrono::year& __y, | |
| 1900 | const chrono::month_day_last& __mdl) noexcept | |
| 1901 | { return {__y, __mdl}; } | |
| 1902 | ||
| 1903 | friend constexpr year_month_day_last | |
| 1904 | operator/(int __y, const chrono::month_day_last& __mdl) noexcept | |
| 1905 | { return chrono::year(__y) / __mdl; } | |
| 1906 | ||
| 1907 | friend constexpr year_month_day_last | |
| 1908 | operator/(const chrono::month_day_last& __mdl, | |
| 1909 | const chrono::year& __y) noexcept | |
| 1910 | { return __y / __mdl; } | |
| 1911 | ||
| 1912 | friend constexpr year_month_day_last | |
| 1913 | operator/(const chrono::month_day_last& __mdl, int __y) noexcept | |
| 1914 | { return chrono::year(__y) / __mdl; } | |
| 03d5044b PP |
1915 | }; |
| 1916 | ||
| 1917 | // year_month_day ctor from year_month_day_last | |
| 1918 | constexpr | |
| 1919 | year_month_day::year_month_day(const year_month_day_last& __ymdl) noexcept | |
| 1920 | : _M_y{__ymdl.year()}, _M_m{__ymdl.month()}, _M_d{__ymdl.day()} | |
| 1921 | { } | |
| 1922 | ||
| 1923 | constexpr bool | |
| 1924 | year_month_day::ok() const noexcept | |
| 1925 | { | |
| 1926 | if (!_M_y.ok() || !_M_m.ok()) | |
| 1927 | return false; | |
| 1928 | return chrono::day{1} <= _M_d && _M_d <= (_M_y / _M_m / last).day(); | |
| 1929 | } | |
| 1930 | ||
| 1931 | // YEAR_MONTH_WEEKDAY | |
| 1932 | ||
| 1933 | class year_month_weekday | |
| 1934 | { | |
| 1935 | private: | |
| 1936 | chrono::year _M_y; | |
| 1937 | chrono::month _M_m; | |
| 1938 | chrono::weekday_indexed _M_wdi; | |
| 1939 | ||
| 1940 | static constexpr year_month_weekday | |
| 1941 | _S_from_sys_days(const sys_days& __dp) | |
| 1942 | { | |
| 1943 | year_month_day __ymd{__dp}; | |
| 1944 | chrono::weekday __wd{__dp}; | |
| 1945 | auto __index = __wd[(unsigned{__ymd.day()} - 1) / 7 + 1]; | |
| 1946 | return {__ymd.year(), __ymd.month(), __index}; | |
| 1947 | } | |
| 1948 | ||
| 1949 | public: | |
| 1950 | year_month_weekday() = default; | |
| 1951 | ||
| 1952 | constexpr | |
| 1953 | year_month_weekday(const chrono::year& __y, const chrono::month& __m, | |
| 1954 | const chrono::weekday_indexed& __wdi) noexcept | |
| 1955 | : _M_y{__y}, _M_m{__m}, _M_wdi{__wdi} | |
| 1956 | { } | |
| 1957 | ||
| 1958 | constexpr | |
| 1959 | year_month_weekday(const sys_days& __dp) noexcept | |
| 1960 | : year_month_weekday{_S_from_sys_days(__dp)} | |
| 1961 | { } | |
| 1962 | ||
| 1963 | explicit constexpr | |
| 1964 | year_month_weekday(const local_days& __dp) noexcept | |
| 1965 | : year_month_weekday{sys_days{__dp.time_since_epoch()}} | |
| 1966 | { } | |
| 1967 | ||
| 7b743c67 PP |
1968 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 1969 | constexpr year_month_weekday& | |
| 1970 | operator+=(const months& __m) noexcept | |
| 1971 | { | |
| 1972 | *this = *this + __m; | |
| 1973 | return *this; | |
| 1974 | } | |
| 03d5044b | 1975 | |
| 7b743c67 PP |
1976 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 1977 | constexpr year_month_weekday& | |
| 1978 | operator-=(const months& __m) noexcept | |
| 1979 | { | |
| 1980 | *this = *this - __m; | |
| 1981 | return *this; | |
| 1982 | } | |
| 03d5044b PP |
1983 | |
| 1984 | constexpr year_month_weekday& | |
| 1985 | operator+=(const years& __y) noexcept | |
| 1986 | { | |
| 1987 | *this = *this + __y; | |
| 1988 | return *this; | |
| 1989 | } | |
| 1990 | ||
| 1991 | constexpr year_month_weekday& | |
| 1992 | operator-=(const years& __y) noexcept | |
| 1993 | { | |
| 1994 | *this = *this - __y; | |
| 1995 | return *this; | |
| 1996 | } | |
| 1997 | ||
| 1998 | constexpr chrono::year | |
| 1999 | year() const noexcept | |
| 2000 | { return _M_y; } | |
| 2001 | ||
| 2002 | constexpr chrono::month | |
| 2003 | month() const noexcept | |
| 2004 | { return _M_m; } | |
| 2005 | ||
| 2006 | constexpr chrono::weekday | |
| 2007 | weekday() const noexcept | |
| 2008 | { return _M_wdi.weekday(); } | |
| 2009 | ||
| 2010 | constexpr unsigned | |
| 2011 | index() const noexcept | |
| 2012 | { return _M_wdi.index(); } | |
| 2013 | ||
| 2014 | constexpr chrono::weekday_indexed | |
| 2015 | weekday_indexed() const noexcept | |
| 2016 | { return _M_wdi; } | |
| 2017 | ||
| 2018 | constexpr | |
| 2019 | operator sys_days() const noexcept | |
| 2020 | { | |
| 2021 | auto __d = sys_days{year() / month() / 1}; | |
| 8572edc8 PP |
2022 | return __d + (weekday() - chrono::weekday(__d) |
| 2023 | + days{(static_cast<int>(index())-1)*7}); | |
| 03d5044b PP |
2024 | } |
| 2025 | ||
| 2026 | explicit constexpr | |
| 2027 | operator local_days() const noexcept | |
| 2028 | { return local_days{sys_days{*this}.time_since_epoch()}; } | |
| 2029 | ||
| 2030 | constexpr bool | |
| 2031 | ok() const noexcept | |
| 2032 | { | |
| 2033 | if (!_M_y.ok() || !_M_m.ok() || !_M_wdi.ok()) | |
| 2034 | return false; | |
| 2035 | if (_M_wdi.index() <= 4) | |
| 2036 | return true; | |
| 2037 | days __d = (_M_wdi.weekday() | |
| 2038 | - chrono::weekday{sys_days{_M_y / _M_m / 1}} | |
| 2039 | + days((_M_wdi.index()-1)*7 + 1)); | |
| 1007170d | 2040 | __glibcxx_assert(__d.count() >= 1); |
| 9fc61d45 | 2041 | return (unsigned)__d.count() <= (unsigned)(_M_y / _M_m / last).day(); |
| 03d5044b PP |
2042 | } |
| 2043 | ||
| 2044 | friend constexpr bool | |
| 2045 | operator==(const year_month_weekday& __x, | |
| 2046 | const year_month_weekday& __y) noexcept | |
| 2047 | { | |
| 2048 | return __x.year() == __y.year() | |
| 2049 | && __x.month() == __y.month() | |
| 0c5df67f | 2050 | && __x.weekday_indexed() == __y.weekday_indexed(); |
| 03d5044b PP |
2051 | } |
| 2052 | ||
| 7b743c67 PP |
2053 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 2054 | friend constexpr year_month_weekday | |
| 2055 | operator+(const year_month_weekday& __ymwd, const months& __dm) noexcept | |
| 2056 | { | |
| 2057 | return ((__ymwd.year() / __ymwd.month() + __dm) | |
| 2058 | / __ymwd.weekday_indexed()); | |
| 2059 | } | |
| 03d5044b | 2060 | |
| 7b743c67 PP |
2061 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 2062 | friend constexpr year_month_weekday | |
| 2063 | operator+(const months& __dm, const year_month_weekday& __ymwd) noexcept | |
| 2064 | { return __ymwd + __dm; } | |
| 03d5044b PP |
2065 | |
| 2066 | friend constexpr year_month_weekday | |
| 2067 | operator+(const year_month_weekday& __ymwd, const years& __dy) noexcept | |
| 2068 | { return {__ymwd.year() + __dy, __ymwd.month(), __ymwd.weekday_indexed()}; } | |
| 2069 | ||
| 2070 | friend constexpr year_month_weekday | |
| 2071 | operator+(const years& __dy, const year_month_weekday& __ymwd) noexcept | |
| 2072 | { return __ymwd + __dy; } | |
| 2073 | ||
| 7b743c67 PP |
2074 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 2075 | friend constexpr year_month_weekday | |
| 2076 | operator-(const year_month_weekday& __ymwd, const months& __dm) noexcept | |
| 2077 | { return __ymwd + -__dm; } | |
| 03d5044b PP |
2078 | |
| 2079 | friend constexpr year_month_weekday | |
| 2080 | operator-(const year_month_weekday& __ymwd, const years& __dy) noexcept | |
| 2081 | { return __ymwd + -__dy; } | |
| 2082 | ||
| 2083 | friend constexpr year_month_weekday | |
| 2084 | operator/(const year_month& __ym, | |
| 2085 | const chrono::weekday_indexed& __wdi) noexcept | |
| 2086 | { return {__ym.year(), __ym.month(), __wdi}; } | |
| 2087 | ||
| 2088 | friend constexpr year_month_weekday | |
| 2089 | operator/(const chrono::year& __y, const month_weekday& __mwd) noexcept | |
| 2090 | { return {__y, __mwd.month(), __mwd.weekday_indexed()}; } | |
| 2091 | ||
| 2092 | friend constexpr year_month_weekday | |
| 2093 | operator/(int __y, const month_weekday& __mwd) noexcept | |
| 2094 | { return chrono::year(__y) / __mwd; } | |
| 2095 | ||
| 2096 | friend constexpr year_month_weekday | |
| 2097 | operator/(const month_weekday& __mwd, const chrono::year& __y) noexcept | |
| 2098 | { return __y / __mwd; } | |
| 2099 | ||
| 2100 | friend constexpr year_month_weekday | |
| 2101 | operator/(const month_weekday& __mwd, int __y) noexcept | |
| 2102 | { return chrono::year(__y) / __mwd; } | |
| 03d5044b PP |
2103 | }; |
| 2104 | ||
| 2105 | // YEAR_MONTH_WEEKDAY_LAST | |
| 2106 | ||
| 2107 | class year_month_weekday_last | |
| 2108 | { | |
| 2109 | private: | |
| 2110 | chrono::year _M_y; | |
| 2111 | chrono::month _M_m; | |
| 2112 | chrono::weekday_last _M_wdl; | |
| 2113 | ||
| 2114 | public: | |
| 2115 | constexpr | |
| 2116 | year_month_weekday_last(const chrono::year& __y, const chrono::month& __m, | |
| 2117 | const chrono::weekday_last& __wdl) noexcept | |
| 2118 | : _M_y{__y}, _M_m{__m}, _M_wdl{__wdl} | |
| 2119 | { } | |
| 2120 | ||
| 7b743c67 PP |
2121 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 2122 | constexpr year_month_weekday_last& | |
| 2123 | operator+=(const months& __m) noexcept | |
| 2124 | { | |
| 2125 | *this = *this + __m; | |
| 2126 | return *this; | |
| 2127 | } | |
| 03d5044b | 2128 | |
| 7b743c67 PP |
2129 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 2130 | constexpr year_month_weekday_last& | |
| 2131 | operator-=(const months& __m) noexcept | |
| 2132 | { | |
| 2133 | *this = *this - __m; | |
| 2134 | return *this; | |
| 2135 | } | |
| 03d5044b PP |
2136 | |
| 2137 | constexpr year_month_weekday_last& | |
| 2138 | operator+=(const years& __y) noexcept | |
| 2139 | { | |
| 2140 | *this = *this + __y; | |
| 2141 | return *this; | |
| 2142 | } | |
| 2143 | ||
| 2144 | constexpr year_month_weekday_last& | |
| 2145 | operator-=(const years& __y) noexcept | |
| 2146 | { | |
| 2147 | *this = *this - __y; | |
| 2148 | return *this; | |
| 2149 | } | |
| 2150 | ||
| 2151 | constexpr chrono::year | |
| 2152 | year() const noexcept | |
| 2153 | { return _M_y; } | |
| 2154 | ||
| 2155 | constexpr chrono::month | |
| 2156 | month() const noexcept | |
| 2157 | { return _M_m; } | |
| 2158 | ||
| 2159 | constexpr chrono::weekday | |
| 2160 | weekday() const noexcept | |
| 2161 | { return _M_wdl.weekday(); } | |
| 2162 | ||
| 2163 | constexpr chrono::weekday_last | |
| 2164 | weekday_last() const noexcept | |
| 2165 | { return _M_wdl; } | |
| 2166 | ||
| 2167 | constexpr | |
| 2168 | operator sys_days() const noexcept | |
| 2169 | { | |
| 2170 | const auto __d = sys_days{_M_y / _M_m / last}; | |
| 2171 | return sys_days{(__d - (chrono::weekday{__d} | |
| 2172 | - _M_wdl.weekday())).time_since_epoch()}; | |
| 2173 | } | |
| 2174 | ||
| 2175 | explicit constexpr | |
| 2176 | operator local_days() const noexcept | |
| 2177 | { return local_days{sys_days{*this}.time_since_epoch()}; } | |
| 2178 | ||
| 2179 | constexpr bool | |
| 2180 | ok() const noexcept | |
| 2181 | { return _M_y.ok() && _M_m.ok() && _M_wdl.ok(); } | |
| 2182 | ||
| 2183 | friend constexpr bool | |
| 2184 | operator==(const year_month_weekday_last& __x, | |
| 2185 | const year_month_weekday_last& __y) noexcept | |
| 2186 | { | |
| 2187 | return __x.year() == __y.year() | |
| 2188 | && __x.month() == __y.month() | |
| 2189 | && __x.weekday_last() == __y.weekday_last(); | |
| 2190 | } | |
| 2191 | ||
| 7b743c67 PP |
2192 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 2193 | friend constexpr year_month_weekday_last | |
| 2194 | operator+(const year_month_weekday_last& __ymwdl, | |
| 2195 | const months& __dm) noexcept | |
| 2196 | { | |
| 2197 | return ((__ymwdl.year() / __ymwdl.month() + __dm) | |
| 2198 | / __ymwdl.weekday_last()); | |
| 2199 | } | |
| 03d5044b | 2200 | |
| 7b743c67 PP |
2201 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 2202 | friend constexpr year_month_weekday_last | |
| 2203 | operator+(const months& __dm, | |
| 2204 | const year_month_weekday_last& __ymwdl) noexcept | |
| 2205 | { return __ymwdl + __dm; } | |
| 03d5044b PP |
2206 | |
| 2207 | friend constexpr year_month_weekday_last | |
| 2208 | operator+(const year_month_weekday_last& __ymwdl, | |
| 2209 | const years& __dy) noexcept | |
| 2210 | { return {__ymwdl.year() + __dy, __ymwdl.month(), __ymwdl.weekday_last()}; } | |
| 2211 | ||
| 2212 | friend constexpr year_month_weekday_last | |
| 2213 | operator+(const years& __dy, | |
| 2214 | const year_month_weekday_last& __ymwdl) noexcept | |
| 2215 | { return __ymwdl + __dy; } | |
| 2216 | ||
| 7b743c67 PP |
2217 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 2218 | friend constexpr year_month_weekday_last | |
| 2219 | operator-(const year_month_weekday_last& __ymwdl, | |
| 2220 | const months& __dm) noexcept | |
| 2221 | { return __ymwdl + -__dm; } | |
| 03d5044b PP |
2222 | |
| 2223 | friend constexpr year_month_weekday_last | |
| 2224 | operator-(const year_month_weekday_last& __ymwdl, | |
| 2225 | const years& __dy) noexcept | |
| 2226 | { return __ymwdl + -__dy; } | |
| 2227 | ||
| 2228 | friend constexpr year_month_weekday_last | |
| 2229 | operator/(const year_month& __ym, | |
| 2230 | const chrono::weekday_last& __wdl) noexcept | |
| 2231 | { return {__ym.year(), __ym.month(), __wdl}; } | |
| 2232 | ||
| 2233 | friend constexpr year_month_weekday_last | |
| 2234 | operator/(const chrono::year& __y, | |
| 2235 | const chrono::month_weekday_last& __mwdl) noexcept | |
| 2236 | { return {__y, __mwdl.month(), __mwdl.weekday_last()}; } | |
| 2237 | ||
| 2238 | friend constexpr year_month_weekday_last | |
| 2239 | operator/(int __y, const chrono::month_weekday_last& __mwdl) noexcept | |
| 2240 | { return chrono::year(__y) / __mwdl; } | |
| 2241 | ||
| 2242 | friend constexpr year_month_weekday_last | |
| 2243 | operator/(const chrono::month_weekday_last& __mwdl, | |
| 2244 | const chrono::year& __y) noexcept | |
| 2245 | { return __y / __mwdl; } | |
| 2246 | ||
| 2247 | friend constexpr year_month_weekday_last | |
| 2248 | operator/(const chrono::month_weekday_last& __mwdl, int __y) noexcept | |
| 2249 | { return chrono::year(__y) / __mwdl; } | |
| 03d5044b PP |
2250 | }; |
| 2251 | ||
| 2252 | // HH_MM_SS | |
| 2253 | ||
| 5329e1a8 | 2254 | /// @cond undocumented |
| 03d5044b PP |
2255 | namespace __detail |
| 2256 | { | |
| 2257 | consteval long long | |
| 2258 | __pow10(unsigned __n) | |
| 2259 | { | |
| 2260 | long long __r = 1; | |
| 2261 | while (__n-- > 0) | |
| 2262 | __r *= 10; | |
| 2263 | return __r; | |
| 2264 | } | |
| f99b9486 JW |
2265 | |
| 2266 | template<typename _Duration> struct __utc_leap_second; | |
| 03d5044b | 2267 | } |
| 5329e1a8 | 2268 | /// @endcond |
| 03d5044b | 2269 | |
| 5329e1a8 JW |
2270 | /** Utility for splitting a duration into hours, minutes, and seconds |
| 2271 | * | |
| 2272 | * This is a convenience type that provides accessors for the constituent | |
| 2273 | * parts (hours, minutes, seconds and subseconds) of a duration. | |
| 2274 | * | |
| 2275 | * @since C++20 | |
| 2276 | */ | |
| 03d5044b PP |
2277 | template<typename _Duration> |
| 2278 | class hh_mm_ss | |
| 2279 | { | |
| 5329e1a8 JW |
2280 | static_assert( __is_duration<_Duration>::value ); |
| 2281 | ||
| 03d5044b | 2282 | private: |
| 5329e1a8 | 2283 | static consteval int |
| 03d5044b PP |
2284 | _S_fractional_width() |
| 2285 | { | |
| 03d5044b | 2286 | auto __den = _Duration::period::den; |
| 5329e1a8 JW |
2287 | const int __multiplicity_2 = std::__countr_zero((uintmax_t)__den); |
| 2288 | __den >>= __multiplicity_2; | |
| 2289 | int __multiplicity_5 = 0; | |
| 03d5044b PP |
2290 | while ((__den % 5) == 0) |
| 2291 | { | |
| 2292 | ++__multiplicity_5; | |
| 2293 | __den /= 5; | |
| 2294 | } | |
| 2295 | if (__den != 1) | |
| 2296 | return 6; | |
| 2297 | ||
| 2298 | int __width = (__multiplicity_2 > __multiplicity_5 | |
| 2299 | ? __multiplicity_2 : __multiplicity_5); | |
| 2300 | if (__width > 18) | |
| 2301 | __width = 18; | |
| 2302 | return __width; | |
| 2303 | } | |
| 2304 | ||
| 5329e1a8 | 2305 | constexpr |
| e36e57b0 | 2306 | hh_mm_ss(_Duration __d, bool __is_neg) |
| 5329e1a8 JW |
2307 | : _M_h (duration_cast<chrono::hours>(__d)), |
| 2308 | _M_m (duration_cast<chrono::minutes>(__d - hours())), | |
| 2309 | _M_s (duration_cast<chrono::seconds>(__d - hours() - minutes())), | |
| 2310 | _M_is_neg(__is_neg) | |
| 2311 | { | |
| 2312 | auto __ss = __d - hours() - minutes() - seconds(); | |
| 2313 | if constexpr (treat_as_floating_point_v<typename precision::rep>) | |
| 2314 | _M_ss._M_r = __ss.count(); | |
| 2315 | else if constexpr (precision::period::den != 1) | |
| 2316 | _M_ss._M_r = duration_cast<precision>(__ss).count(); | |
| 2317 | } | |
| 2318 | ||
| e36e57b0 JW |
2319 | static constexpr _Duration |
| 2320 | _S_abs(_Duration __d) | |
| 2321 | { | |
| 2322 | if constexpr (numeric_limits<typename _Duration::rep>::is_signed) | |
| 2323 | return chrono::abs(__d); | |
| 2324 | else | |
| 2325 | return __d; | |
| 2326 | } | |
| 2327 | ||
| 03d5044b PP |
2328 | public: |
| 2329 | static constexpr unsigned fractional_width = {_S_fractional_width()}; | |
| 2330 | ||
| 2331 | using precision | |
| 2332 | = duration<common_type_t<typename _Duration::rep, | |
| 2333 | chrono::seconds::rep>, | |
| 2334 | ratio<1, __detail::__pow10(fractional_width)>>; | |
| 2335 | ||
| 5329e1a8 | 2336 | constexpr hh_mm_ss() noexcept = default; |
| 03d5044b PP |
2337 | |
| 2338 | constexpr explicit | |
| e36e57b0 JW |
2339 | hh_mm_ss(_Duration __d) |
| 2340 | : hh_mm_ss(_S_abs(__d), __d < _Duration::zero()) | |
| 5329e1a8 | 2341 | { } |
| 03d5044b PP |
2342 | |
| 2343 | constexpr bool | |
| 2344 | is_negative() const noexcept | |
| 5329e1a8 | 2345 | { |
| cb363fd9 | 2346 | if constexpr (!_S_is_unsigned) |
| 5329e1a8 JW |
2347 | return _M_is_neg; |
| 2348 | else | |
| 2349 | return false; | |
| 2350 | } | |
| 03d5044b PP |
2351 | |
| 2352 | constexpr chrono::hours | |
| 2353 | hours() const noexcept | |
| 2354 | { return _M_h; } | |
| 2355 | ||
| 2356 | constexpr chrono::minutes | |
| 2357 | minutes() const noexcept | |
| 2358 | { return _M_m; } | |
| 2359 | ||
| 2360 | constexpr chrono::seconds | |
| 2361 | seconds() const noexcept | |
| 2362 | { return _M_s; } | |
| 2363 | ||
| 2364 | constexpr precision | |
| 2365 | subseconds() const noexcept | |
| 5329e1a8 | 2366 | { return static_cast<precision>(_M_ss); } |
| 03d5044b PP |
2367 | |
| 2368 | constexpr explicit | |
| 2369 | operator precision() const noexcept | |
| 2370 | { return to_duration(); } | |
| 2371 | ||
| 2372 | constexpr precision | |
| 2373 | to_duration() const noexcept | |
| 2374 | { | |
| cb363fd9 | 2375 | if constexpr (!_S_is_unsigned) |
| 5329e1a8 JW |
2376 | if (_M_is_neg) |
| 2377 | return -(_M_h + _M_m + _M_s + subseconds()); | |
| 2378 | return _M_h + _M_m + _M_s + subseconds(); | |
| 03d5044b PP |
2379 | } |
| 2380 | ||
| 03d5044b | 2381 | private: |
| cb363fd9 | 2382 | static constexpr bool _S_is_unsigned |
| 5329e1a8 JW |
2383 | = __and_v<is_integral<typename _Duration::rep>, |
| 2384 | is_unsigned<typename _Duration::rep>>; | |
| 2385 | ||
| 2386 | template<typename _Ratio> | |
| 2387 | using __byte_duration = duration<unsigned char, _Ratio>; | |
| 2388 | ||
| 2389 | // The type of the _M_ss member that holds the subsecond precision. | |
| 2390 | template<typename _Dur> | |
| 2391 | struct __subseconds | |
| 2392 | { | |
| 2393 | typename _Dur::rep _M_r{}; | |
| 2394 | ||
| 2395 | constexpr explicit | |
| 2396 | operator _Dur() const noexcept | |
| 2397 | { return _Dur(_M_r); } | |
| 2398 | }; | |
| 2399 | ||
| 2400 | // An empty class if this precision doesn't need subseconds. | |
| 2401 | template<typename _Rep> | |
| 2402 | requires (!treat_as_floating_point_v<_Rep>) | |
| 2403 | struct __subseconds<duration<_Rep, ratio<1>>> | |
| 2404 | { | |
| 2405 | constexpr explicit | |
| 2406 | operator duration<_Rep, ratio<1>>() const noexcept | |
| 2407 | { return {}; } | |
| 2408 | }; | |
| 2409 | ||
| 5329e1a8 JW |
2410 | template<typename _Rep, typename _Period> |
| 2411 | requires (!treat_as_floating_point_v<_Rep>) | |
| 2412 | && ratio_less_v<_Period, ratio<1, 1>> | |
| aa39ed44 | 2413 | && ratio_greater_equal_v<_Period, ratio<1, 250>> |
| 5329e1a8 JW |
2414 | struct __subseconds<duration<_Rep, _Period>> |
| 2415 | { | |
| 2416 | unsigned char _M_r{}; | |
| 2417 | ||
| 2418 | constexpr explicit | |
| 2419 | operator duration<_Rep, _Period>() const noexcept | |
| 2420 | { return duration<_Rep, _Period>(_M_r); } | |
| 2421 | }; | |
| 2422 | ||
| 2423 | template<typename _Rep, typename _Period> | |
| 2424 | requires (!treat_as_floating_point_v<_Rep>) | |
| 2425 | && ratio_less_v<_Period, ratio<1, 250>> | |
| aa39ed44 | 2426 | && ratio_greater_equal_v<_Period, ratio<1, 4000000000>> |
| 5329e1a8 JW |
2427 | struct __subseconds<duration<_Rep, _Period>> |
| 2428 | { | |
| 2429 | uint_least32_t _M_r{}; | |
| 2430 | ||
| 2431 | constexpr explicit | |
| 2432 | operator duration<_Rep, _Period>() const noexcept | |
| 2433 | { return duration<_Rep, _Period>(_M_r); } | |
| 2434 | }; | |
| 2435 | ||
| 2436 | chrono::hours _M_h{}; | |
| 2437 | __byte_duration<ratio<60>> _M_m{}; | |
| 2438 | __byte_duration<ratio<1>> _M_s{}; | |
| 2439 | bool _M_is_neg{}; | |
| 2440 | __subseconds<precision> _M_ss{}; | |
| f99b9486 JW |
2441 | |
| 2442 | template<typename> friend struct __detail::__utc_leap_second; | |
| 03d5044b | 2443 | }; |
| f2ce64b5 | 2444 | |
| f99b9486 JW |
2445 | /// @cond undocumented |
| 2446 | namespace __detail | |
| 2447 | { | |
| 2448 | // Represents a time that is within a leap second insertion. | |
| 2449 | template<typename _Duration> | |
| 2450 | struct __utc_leap_second | |
| 2451 | { | |
| 2452 | explicit | |
| 2453 | __utc_leap_second(const sys_time<_Duration>& __s) | |
| 2454 | : _M_date(chrono::floor<days>(__s)), _M_time(__s - _M_date) | |
| 2455 | { | |
| 2456 | ++_M_time._M_s; | |
| 2457 | } | |
| 2458 | ||
| 2459 | sys_days _M_date; | |
| 2460 | hh_mm_ss<common_type_t<_Duration, days>> _M_time; | |
| 2461 | }; | |
| 2462 | } | |
| 2463 | /// @endcond | |
| 2464 | ||
| 03d5044b PP |
2465 | // 12/24 HOURS FUNCTIONS |
| 2466 | ||
| 2467 | constexpr bool | |
| 2468 | is_am(const hours& __h) noexcept | |
| 2469 | { return 0h <= __h && __h <= 11h; } | |
| 2470 | ||
| 2471 | constexpr bool | |
| 2472 | is_pm(const hours& __h) noexcept | |
| 2473 | { return 12h <= __h && __h <= 23h; } | |
| 2474 | ||
| 2475 | constexpr hours | |
| 2476 | make12(const hours& __h) noexcept | |
| 2477 | { | |
| 2478 | if (__h == 0h) | |
| 2479 | return 12h; | |
| 2480 | else if (__h > 12h) | |
| 2481 | return __h - 12h; | |
| 2482 | return __h; | |
| 2483 | } | |
| 2484 | ||
| 2485 | constexpr hours | |
| 2486 | make24(const hours& __h, bool __is_pm) noexcept | |
| 2487 | { | |
| 2488 | if (!__is_pm) | |
| 2489 | { | |
| 2490 | if (__h == 12h) | |
| 2491 | return 0h; | |
| 2492 | else | |
| 2493 | return __h; | |
| 2494 | } | |
| 2495 | else | |
| 2496 | { | |
| 2497 | if (__h == 12h) | |
| 2498 | return __h; | |
| 2499 | else | |
| 2500 | return __h + 12h; | |
| 2501 | } | |
| 2502 | } | |
| 1736bf5a | 2503 | |
| 9fc61d45 | 2504 | #if _GLIBCXX_USE_CXX11_ABI || ! _GLIBCXX_USE_DUAL_ABI |
| 1736bf5a JW |
2505 | // C++20 [time.zones] Time zones |
| 2506 | ||
| 9fc61d45 JW |
2507 | struct tzdb; |
| 2508 | ||
| 1736bf5a JW |
2509 | struct sys_info |
| 2510 | { | |
| 2511 | sys_seconds begin; | |
| 2512 | sys_seconds end; | |
| 2513 | seconds offset; | |
| 2514 | minutes save; | |
| 2515 | string abbrev; | |
| 2516 | }; | |
| 2517 | ||
| 2518 | struct local_info | |
| 2519 | { | |
| 2520 | static constexpr int unique = 0; | |
| 2521 | static constexpr int nonexistent = 1; | |
| 2522 | static constexpr int ambiguous = 2; | |
| 2523 | ||
| 2524 | int result; | |
| 2525 | sys_info first; | |
| 2526 | sys_info second; | |
| 2527 | }; | |
| 2528 | ||
| 2529 | class nonexistent_local_time : public runtime_error | |
| 2530 | { | |
| 2531 | public: | |
| 2532 | template<typename _Duration> | |
| 2533 | nonexistent_local_time(const local_time<_Duration>& __tp, | |
| 2534 | const local_info& __i) | |
| 2535 | : runtime_error(_S_make_what_str(__tp, __i)) | |
| 2536 | { __glibcxx_assert(__i.result == local_info::nonexistent); } | |
| 2537 | ||
| 2538 | private: | |
| 9fc61d45 | 2539 | template<typename _Duration> |
| 1736bf5a | 2540 | static string |
| 9fc61d45 JW |
2541 | _S_make_what_str(const local_time<_Duration>& __tp, |
| 2542 | const local_info& __i) | |
| 2543 | { | |
| 9fc61d45 JW |
2544 | std::ostringstream __os; |
| 2545 | __os << __tp << " is in a gap between\n" | |
| 2546 | << local_seconds(__i.first.end.time_since_epoch()) | |
| 2547 | + __i.first.offset << ' ' << __i.first.abbrev << " and\n" | |
| 2548 | << local_seconds(__i.second.begin.time_since_epoch()) | |
| 2549 | + __i.second.offset << ' ' << __i.second.abbrev | |
| 2550 | << " which are both equivalent to\n" | |
| 2551 | << __i.first.end << " UTC"; | |
| 2552 | return std::move(__os).str(); | |
| 9fc61d45 | 2553 | } |
| 1736bf5a JW |
2554 | }; |
| 2555 | ||
| 2556 | class ambiguous_local_time : public runtime_error | |
| 2557 | { | |
| 2558 | public: | |
| 2559 | template<typename _Duration> | |
| 2560 | ambiguous_local_time(const local_time<_Duration>& __tp, | |
| 9fc61d45 | 2561 | const local_info& __i) |
| 1736bf5a | 2562 | : runtime_error(_S_make_what_str(__tp, __i)) |
| 9fc61d45 | 2563 | { __glibcxx_assert(__i.result == local_info::ambiguous); } |
| 1736bf5a JW |
2564 | |
| 2565 | private: | |
| 9fc61d45 | 2566 | template<typename _Duration> |
| 1736bf5a | 2567 | static string |
| 9fc61d45 JW |
2568 | _S_make_what_str(const local_time<_Duration>& __tp, |
| 2569 | const local_info& __i) | |
| 2570 | { | |
| 9fc61d45 JW |
2571 | std::ostringstream __os; |
| 2572 | __os << __tp << " is ambiguous. It could be\n" | |
| 2573 | << __tp << ' ' << __i.first.abbrev << " == " | |
| 2574 | << __tp - __i.first.offset << " UTC or\n" | |
| 2575 | << __tp << ' ' << __i.second.abbrev << " == " | |
| 2576 | << __tp - __i.second.offset << " UTC"; | |
| 2577 | return std::move(__os).str(); | |
| 9fc61d45 | 2578 | } |
| 1736bf5a JW |
2579 | }; |
| 2580 | ||
| 9fc61d45 JW |
2581 | template<typename _Duration> |
| 2582 | [[noreturn]] void | |
| 2583 | __throw_bad_local_time(const local_time<_Duration>& __tp, | |
| 2584 | const local_info& __i) | |
| 2585 | { | |
| 2586 | #if __cpp_exceptions | |
| 2587 | if (__i.result == local_info::nonexistent) | |
| 2588 | throw nonexistent_local_time(__tp, __i); | |
| 2589 | throw ambiguous_local_time(__tp, __i); | |
| 2590 | #else | |
| 2591 | __builtin_abort(); | |
| 2592 | #endif | |
| 2593 | } | |
| 2594 | ||
| 1736bf5a JW |
2595 | enum class choose { earliest, latest }; |
| 2596 | ||
| 2597 | class time_zone | |
| 2598 | { | |
| 2599 | public: | |
| 2600 | time_zone(time_zone&&) = default; | |
| 2601 | time_zone& operator=(time_zone&&) = default; | |
| 2602 | ||
| 9fc61d45 JW |
2603 | ~time_zone(); |
| 2604 | ||
| 2605 | [[nodiscard]] | |
| 1736bf5a JW |
2606 | string_view name() const noexcept { return _M_name; } |
| 2607 | ||
| 2608 | template<typename _Duration> | |
| 2609 | sys_info | |
| 9fc61d45 JW |
2610 | get_info(const sys_time<_Duration>& __st) const |
| 2611 | { return _M_get_sys_info(chrono::floor<seconds>(__st)); } | |
| 1736bf5a JW |
2612 | |
| 2613 | template<typename _Duration> | |
| 2614 | local_info | |
| 9fc61d45 JW |
2615 | get_info(const local_time<_Duration>& __tp) const |
| 2616 | { return _M_get_local_info(chrono::floor<seconds>(__tp)); } | |
| 1736bf5a JW |
2617 | |
| 2618 | template<typename _Duration> | |
| 2619 | sys_time<common_type_t<_Duration, seconds>> | |
| 9fc61d45 JW |
2620 | to_sys(const local_time<_Duration>& __tp) const |
| 2621 | { | |
| 2622 | local_info __info = get_info(__tp); | |
| 2623 | ||
| 2624 | if (__info.result != local_info::unique) | |
| 2625 | __throw_bad_local_time(__tp, __info); | |
| 2626 | ||
| 2627 | return sys_time<_Duration>(__tp.time_since_epoch()) | |
| 2628 | - __info.first.offset; | |
| 2629 | } | |
| 1736bf5a JW |
2630 | |
| 2631 | template<typename _Duration> | |
| 2632 | sys_time<common_type_t<_Duration, seconds>> | |
| 9fc61d45 JW |
2633 | to_sys(const local_time<_Duration>& __tp, choose __z) const |
| 2634 | { | |
| 2635 | local_info __info = get_info(__tp); | |
| 2636 | ||
| 2637 | if (__info.result == local_info::nonexistent) | |
| 2638 | return __info.first.end; // Last second of the previous sys_info. | |
| 2639 | ||
| 2640 | sys_time<_Duration> __st(__tp.time_since_epoch()); | |
| 2641 | ||
| 2642 | if (__info.result == local_info::ambiguous && __z == choose::latest) | |
| 2643 | return __st - __info.second.offset; // Time in the later sys_info. | |
| 2644 | // else if __z == earliest, use __info.first.offset as below: | |
| 2645 | ||
| 2646 | return __st - __info.first.offset; | |
| 2647 | } | |
| 1736bf5a JW |
2648 | |
| 2649 | template<typename _Duration> | |
| 2650 | local_time<common_type_t<_Duration, seconds>> | |
| 9fc61d45 JW |
2651 | to_local(const sys_time<_Duration>& __tp) const |
| 2652 | { | |
| 2653 | auto __d = (__tp + get_info(__tp).offset).time_since_epoch(); | |
| 2654 | return local_time<common_type_t<_Duration, seconds>>(__d); | |
| 2655 | } | |
| 1736bf5a | 2656 | |
| 9fc61d45 | 2657 | [[nodiscard]] friend bool |
| 1736bf5a | 2658 | operator==(const time_zone& __x, const time_zone& __y) noexcept |
| 9fc61d45 | 2659 | { return __x._M_name == __y._M_name; } |
| 1736bf5a | 2660 | |
| 9fc61d45 | 2661 | [[nodiscard]] friend strong_ordering |
| 1736bf5a | 2662 | operator<=>(const time_zone& __x, const time_zone& __y) noexcept |
| 9fc61d45 | 2663 | { return __x._M_name <=> __y._M_name; } |
| 1736bf5a JW |
2664 | |
| 2665 | private: | |
| 9fc61d45 JW |
2666 | sys_info _M_get_sys_info(sys_seconds) const; |
| 2667 | local_info _M_get_local_info(local_seconds) const; | |
| 2668 | ||
| 2669 | friend const tzdb& reload_tzdb(); | |
| 2670 | friend struct tzdb; | |
| 2671 | friend class tzdb_list; | |
| 2672 | ||
| 1736bf5a | 2673 | struct _Impl; |
| 9fc61d45 JW |
2674 | |
| 2675 | explicit time_zone(unique_ptr<_Impl> __p); | |
| 2676 | string _M_name; | |
| 1736bf5a JW |
2677 | unique_ptr<_Impl> _M_impl; |
| 2678 | }; | |
| 2679 | ||
| 1736bf5a JW |
2680 | const time_zone* locate_zone(string_view __tz_name); |
| 2681 | const time_zone* current_zone(); | |
| 2682 | ||
| 9fc61d45 JW |
2683 | /** The list of `chrono::tzdb` objects |
| 2684 | * | |
| 2685 | * A single object of this type is constructed by the C++ runtime, | |
| 2686 | * and can be accessed by calling `chrono::get_tzdb_list()`. | |
| 2687 | * | |
| 2688 | * The front of the list is the current `tzdb` object and can be accessed | |
| 2689 | * via `chrono::get_tzdb_list().front()` or `chrono::get_tzdb()` or | |
| 2690 | * `*chrono::get_tzdb_list().begin()`. | |
| 2691 | * | |
| 2692 | * The `chrono::reload_tzdb()` function will check for a newer version | |
| 2693 | * and if found, insert it at the front of the list. | |
| 2694 | * | |
| 2695 | * @since C++20 | |
| 2696 | */ | |
| 2697 | class tzdb_list | |
| 2698 | { | |
| 2699 | struct _Node; | |
| 2700 | ||
| 2701 | public: | |
| 2702 | tzdb_list(const tzdb_list&) = delete; | |
| 2703 | tzdb_list& operator=(const tzdb_list&) = delete; | |
| 2704 | ||
| 2705 | /** An iterator into the `tzdb_list` | |
| 2706 | * | |
| 2707 | * As a extension, in libstdc++ each `tzdb` is reference-counted | |
| 2708 | * and the `const_iterator` type shares ownership of the object it | |
| 2709 | * refers to. This ensures that a `tzdb` erased from the list will | |
| 2710 | * not be destroyed while there is an iterator that refers to it. | |
| 2711 | */ | |
| 2712 | class const_iterator | |
| 2713 | { | |
| 2714 | public: | |
| 2715 | using value_type = tzdb; | |
| 2716 | using reference = const tzdb&; | |
| 2717 | using pointer = const tzdb*; | |
| 2718 | using difference_type = ptrdiff_t; | |
| 2719 | using iterator_category = forward_iterator_tag; | |
| 2720 | ||
| 2721 | constexpr const_iterator() = default; | |
| 2722 | const_iterator(const const_iterator&) = default; | |
| 2723 | const_iterator(const_iterator&&) = default; | |
| 2724 | const_iterator& operator=(const const_iterator&) = default; | |
| 2725 | const_iterator& operator=(const_iterator&&) = default; | |
| 2726 | ||
| 2727 | reference operator*() const noexcept; | |
| 2728 | pointer operator->() const noexcept { return &**this; } | |
| 2729 | const_iterator& operator++(); | |
| 2730 | const_iterator operator++(int); | |
| 2731 | ||
| 2732 | bool operator==(const const_iterator&) const noexcept = default; | |
| 2733 | ||
| 2734 | private: | |
| 2735 | explicit const_iterator(const shared_ptr<_Node>&) noexcept; | |
| 2736 | ||
| 2737 | friend class tzdb_list; | |
| 2738 | ||
| 2739 | shared_ptr<_Node> _M_node; | |
| 2740 | void* _M_reserved = nullptr; | |
| 2741 | }; | |
| 2742 | ||
| 2743 | /** Access the current `tzdb` at the front of the list. | |
| 2744 | * | |
| 2745 | * This returns a reference to the same object as `chrono::get_tzdb()`. | |
| 2746 | * | |
| 2747 | * @returns A reference to the current tzdb object. | |
| 2748 | * @since C++20 | |
| 2749 | */ | |
| 2750 | const tzdb& front() const noexcept; | |
| 2751 | ||
| 2752 | /** Remove the tzdb object _after_ the one the iterator refers to. | |
| 2753 | * | |
| 2754 | * Calling this function concurently with any of `front()`, `begin()`, | |
| 2755 | * or `end()` does not cause a data race, but in general this function | |
| 2756 | * is not thread-safe. The behaviour may be undefined if erasing an | |
| 2757 | * element from the list while another thread is calling the same | |
| 2758 | * function, or incrementing an iterator into the list, or accessing | |
| 2759 | * the element being erased (unless it is accessed through an iterator). | |
| 2760 | * | |
| 2761 | * @param __p A dereferenceable iterator. | |
| 2762 | * @returns An iterator the element after the one that was erased | |
| 2763 | * (or `end()` if there is no such element). | |
| 2764 | * @since C++20 | |
| 2765 | */ | |
| 2766 | const_iterator erase_after(const_iterator __p); | |
| 2767 | ||
| 2768 | const_iterator begin() const noexcept; | |
| 2769 | const_iterator end() const noexcept { return {}; } | |
| 2770 | const_iterator cbegin() const noexcept { return begin(); } | |
| 2771 | const_iterator cend() const noexcept { return end(); } | |
| 2772 | ||
| 2773 | private: | |
| 2774 | constexpr explicit tzdb_list(nullptr_t); | |
| 2775 | ||
| 2776 | friend tzdb_list& get_tzdb_list(); | |
| 2777 | friend const tzdb& get_tzdb(); | |
| 2778 | friend const tzdb& reload_tzdb(); | |
| 2779 | friend struct tzdb; | |
| 2780 | friend class leap_second; | |
| 2781 | friend struct time_zone::_Impl; | |
| 2782 | friend class time_zone_link; | |
| 2783 | }; | |
| 2784 | ||
| 1736bf5a JW |
2785 | class time_zone_link |
| 2786 | { | |
| 2787 | public: | |
| 2788 | time_zone_link(time_zone_link&&) = default; | |
| 2789 | time_zone_link& operator=(time_zone_link&&) = default; | |
| 2790 | ||
| 2791 | string_view name() const noexcept { return _M_name; } | |
| 2792 | string_view target() const noexcept { return _M_target; } | |
| 2793 | ||
| 2794 | friend bool | |
| 2795 | operator==(const time_zone_link& __x, const time_zone_link& __y) noexcept | |
| 2796 | { return __x.name() == __y.name(); } | |
| 2797 | ||
| 2798 | friend strong_ordering | |
| 2799 | operator<=>(const time_zone_link& __x, const time_zone_link& __y) noexcept | |
| 2800 | { return __x.name() <=> __y.name(); } | |
| 2801 | ||
| 2802 | private: | |
| 2803 | friend const tzdb& reload_tzdb(); | |
| 5b46eacc | 2804 | friend struct tzdb_list::_Node; |
| 9fc61d45 JW |
2805 | |
| 2806 | explicit time_zone_link(nullptr_t) { } | |
| 2807 | ||
| 1736bf5a JW |
2808 | string _M_name; |
| 2809 | string _M_target; | |
| 2810 | }; | |
| 2811 | ||
| 2812 | class leap_second | |
| 2813 | { | |
| 2814 | public: | |
| 2815 | leap_second(const leap_second&) = default; | |
| 2816 | leap_second& operator=(const leap_second&) = default; | |
| 2817 | ||
| ec8f914f | 2818 | [[nodiscard]] |
| 1736bf5a JW |
2819 | constexpr sys_seconds |
| 2820 | date() const noexcept | |
| 2821 | { | |
| 2822 | if (_M_s >= _M_s.zero()) [[likely]] | |
| 2823 | return sys_seconds(_M_s); | |
| 2824 | return sys_seconds(-_M_s); | |
| 2825 | } | |
| 2826 | ||
| ec8f914f | 2827 | [[nodiscard]] |
| 1736bf5a JW |
2828 | constexpr seconds |
| 2829 | value() const noexcept | |
| 2830 | { | |
| 2831 | if (_M_s >= _M_s.zero()) [[likely]] | |
| 2832 | return seconds(1); | |
| 2833 | return seconds(-1); | |
| 2834 | } | |
| 2835 | ||
| 2836 | // This can be defaulted because the database will never contain two | |
| 2837 | // leap_second objects with the same date but different signs. | |
| ec8f914f | 2838 | [[nodiscard]] friend constexpr bool |
| 1736bf5a JW |
2839 | operator==(const leap_second&, const leap_second&) noexcept = default; |
| 2840 | ||
| ec8f914f | 2841 | [[nodiscard]] friend constexpr strong_ordering |
| 1736bf5a JW |
2842 | operator<=>(const leap_second& __x, const leap_second& __y) noexcept |
| 2843 | { return __x.date() <=> __y.date(); } | |
| 2844 | ||
| 2845 | template<typename _Duration> | |
| ec8f914f | 2846 | [[nodiscard]] friend constexpr bool |
| 1736bf5a JW |
2847 | operator==(const leap_second& __x, |
| 2848 | const sys_time<_Duration>& __y) noexcept | |
| 2849 | { return __x.date() == __y; } | |
| 2850 | ||
| 2851 | template<typename _Duration> | |
| ec8f914f | 2852 | [[nodiscard]] friend constexpr bool |
| 1736bf5a JW |
2853 | operator<(const leap_second& __x, |
| 2854 | const sys_time<_Duration>& __y) noexcept | |
| 2855 | { return __x.date() < __y; } | |
| 2856 | ||
| 2857 | template<typename _Duration> | |
| ec8f914f | 2858 | [[nodiscard]] friend constexpr bool |
| 1736bf5a JW |
2859 | operator<(const sys_time<_Duration>& __x, |
| 2860 | const leap_second& __y) noexcept | |
| 2861 | { return __x < __y.date(); } | |
| 2862 | ||
| 2863 | template<typename _Duration> | |
| ec8f914f | 2864 | [[nodiscard]] friend constexpr bool |
| 1736bf5a JW |
2865 | operator>(const leap_second& __x, |
| 2866 | const sys_time<_Duration>& __y) noexcept | |
| 2867 | { return __y < __x.date(); } | |
| 2868 | ||
| 2869 | template<typename _Duration> | |
| ec8f914f | 2870 | [[nodiscard]] friend constexpr bool |
| 1736bf5a JW |
2871 | operator>(const sys_time<_Duration>& __x, |
| 2872 | const leap_second& __y) noexcept | |
| 2873 | { return __y.date() < __x; } | |
| 2874 | ||
| 2875 | template<typename _Duration> | |
| ec8f914f | 2876 | [[nodiscard]] friend constexpr bool |
| 1736bf5a | 2877 | operator<=(const leap_second& __x, |
| ec8f914f | 2878 | const sys_time<_Duration>& __y) noexcept |
| 1736bf5a JW |
2879 | { return !(__y < __x.date()); } |
| 2880 | ||
| 2881 | template<typename _Duration> | |
| ec8f914f | 2882 | [[nodiscard]] friend constexpr bool |
| 1736bf5a | 2883 | operator<=(const sys_time<_Duration>& __x, |
| ec8f914f | 2884 | const leap_second& __y) noexcept |
| 1736bf5a JW |
2885 | { return !(__y.date() < __x); } |
| 2886 | ||
| 2887 | template<typename _Duration> | |
| ec8f914f | 2888 | [[nodiscard]] friend constexpr bool |
| 1736bf5a | 2889 | operator>=(const leap_second& __x, |
| ec8f914f | 2890 | const sys_time<_Duration>& __y) noexcept |
| 1736bf5a JW |
2891 | { return !(__x.date() < __y); } |
| 2892 | ||
| 2893 | template<typename _Duration> | |
| ec8f914f | 2894 | [[nodiscard]] friend constexpr bool |
| 1736bf5a | 2895 | operator>=(const sys_time<_Duration>& __x, |
| ec8f914f | 2896 | const leap_second& __y) noexcept |
| 1736bf5a JW |
2897 | { return !(__x < __y.date()); } |
| 2898 | ||
| 2899 | template<three_way_comparable_with<seconds> _Duration> | |
| ec8f914f | 2900 | [[nodiscard]] friend constexpr auto |
| 1736bf5a | 2901 | operator<=>(const leap_second& __x, |
| ec8f914f | 2902 | const sys_time<_Duration>& __y) noexcept |
| 1736bf5a JW |
2903 | { return __x.date() <=> __y; } |
| 2904 | ||
| 2905 | private: | |
| 2906 | explicit leap_second(seconds::rep __s) : _M_s(__s) { } | |
| 2907 | ||
| 5b46eacc | 2908 | friend struct tzdb_list::_Node; |
| 9fc61d45 | 2909 | |
| 1736bf5a | 2910 | friend const tzdb& reload_tzdb(); |
| 9fc61d45 JW |
2911 | |
| 2912 | template<typename _Duration> | |
| 1736bf5a | 2913 | friend leap_second_info |
| 9fc61d45 | 2914 | get_leap_second_info(const utc_time<_Duration>&); |
| 1736bf5a JW |
2915 | |
| 2916 | seconds _M_s; // == date().time_since_epoch() * value().count() | |
| 2917 | }; | |
| 2918 | ||
| 2919 | template<class _Tp> struct zoned_traits { }; | |
| 2920 | ||
| 2921 | template<> | |
| 2922 | struct zoned_traits<const time_zone*> | |
| 2923 | { | |
| 2924 | static const time_zone* | |
| 2925 | default_zone() | |
| 2926 | { return std::chrono::locate_zone("UTC"); } | |
| 2927 | ||
| 2928 | static const time_zone* | |
| 2929 | locate_zone(string_view __name) | |
| 2930 | { return std::chrono::locate_zone(__name); } | |
| 2931 | }; | |
| 2932 | ||
| 2933 | struct tzdb | |
| 2934 | { | |
| 2935 | string version; | |
| 9fc61d45 JW |
2936 | _GLIBCXX_STD_C::vector<time_zone> zones; |
| 2937 | _GLIBCXX_STD_C::vector<time_zone_link> links; | |
| 2938 | _GLIBCXX_STD_C::vector<leap_second> leap_seconds; | |
| 1736bf5a JW |
2939 | |
| 2940 | const time_zone* | |
| 2941 | locate_zone(string_view __tz_name) const; | |
| 2942 | ||
| 2943 | const time_zone* | |
| 2944 | current_zone() const; | |
| 2945 | ||
| 2946 | private: | |
| 2947 | friend const tzdb& reload_tzdb(); | |
| 9fc61d45 | 2948 | friend class time_zone; |
| 5b46eacc | 2949 | friend struct tzdb_list::_Node; |
| 1736bf5a JW |
2950 | }; |
| 2951 | ||
| 9fc61d45 JW |
2952 | tzdb_list& get_tzdb_list(); |
| 2953 | const tzdb& get_tzdb(); | |
| 1736bf5a | 2954 | |
| 9fc61d45 JW |
2955 | const tzdb& reload_tzdb(); |
| 2956 | string remote_version(); | |
| 2957 | ||
| 2958 | template<typename _Duration, typename _TimeZonePtr = const time_zone*> | |
| 2959 | class zoned_time | |
| 1736bf5a | 2960 | { |
| 9fc61d45 JW |
2961 | static_assert(__is_duration_v<_Duration>); |
| 2962 | ||
| 2963 | using _Traits = zoned_traits<_TimeZonePtr>; | |
| 2964 | ||
| 2965 | // Every constructor that accepts a string_view as its first parameter | |
| 2966 | // does not participate in class template argument deduction. | |
| 2967 | using string_view = type_identity_t<std::string_view>; | |
| 2968 | ||
| 1736bf5a | 2969 | public: |
| 9fc61d45 | 2970 | using duration = common_type_t<_Duration, seconds>; |
| 1736bf5a | 2971 | |
| 9fc61d45 JW |
2972 | zoned_time() requires requires { _Traits::default_zone(); } |
| 2973 | { } | |
| 1736bf5a | 2974 | |
| 9fc61d45 JW |
2975 | zoned_time(const zoned_time&) = default; |
| 2976 | zoned_time& operator=(const zoned_time&) = default; | |
| 1736bf5a | 2977 | |
| 9fc61d45 JW |
2978 | zoned_time(const sys_time<_Duration>& __st) |
| 2979 | requires requires { _Traits::default_zone(); } | |
| 2980 | : _M_tp(__st) | |
| 2981 | { } | |
| 1736bf5a | 2982 | |
| 9fc61d45 JW |
2983 | explicit |
| 2984 | zoned_time(_TimeZonePtr __z) : _M_zone(std::move(__z)) { } | |
| 1736bf5a | 2985 | |
| 9fc61d45 JW |
2986 | explicit |
| 2987 | zoned_time(string_view __name) | |
| 2988 | requires requires { | |
| 2989 | _TimeZonePtr{_Traits::locate_zone(std::string_view{})}; | |
| 2990 | } | |
| 2991 | : _M_zone(_Traits::locate_zone(__name)) | |
| 2992 | { } | |
| 1736bf5a | 2993 | |
| 9fc61d45 JW |
2994 | template<typename _Duration2> |
| 2995 | zoned_time(const zoned_time<_Duration2, _TimeZonePtr>& __zt) | |
| 2996 | requires is_convertible_v<sys_time<_Duration2>, sys_time<_Duration>> | |
| 2997 | : _M_zone(__zt._M_zone), _M_tp(__zt._M_tp) | |
| 2998 | { } | |
| 1736bf5a | 2999 | |
| 9fc61d45 JW |
3000 | zoned_time(_TimeZonePtr __z, const sys_time<_Duration>& __st) |
| 3001 | : _M_zone(std::move(__z)), _M_tp(__st) | |
| 3002 | { } | |
| 1736bf5a | 3003 | |
| 9fc61d45 JW |
3004 | zoned_time(string_view __name, const sys_time<_Duration>& __st) |
| 3005 | : zoned_time(_Traits::locate_zone(__name), __st) | |
| 3006 | { } | |
| 1736bf5a | 3007 | |
| 9fc61d45 JW |
3008 | zoned_time(_TimeZonePtr __z, const local_time<_Duration>& __tp) |
| 3009 | requires requires { | |
| 3010 | { __z->to_sys(__tp) } -> convertible_to<sys_time<_Duration>>; | |
| 3011 | } | |
| 3012 | : _M_zone(std::move(__z)), _M_tp(_M_zone->to_sys(__tp)) | |
| 3013 | { } | |
| 1736bf5a | 3014 | |
| 9fc61d45 JW |
3015 | zoned_time(string_view __name, const local_time<_Duration>& __tp) |
| 3016 | requires requires (_TimeZonePtr __z) { | |
| 3017 | { _Traits::locate_zone(__name) } -> convertible_to<_TimeZonePtr>; | |
| 3018 | { __z->to_sys(__tp) } -> convertible_to<sys_time<_Duration>>; | |
| 3019 | } | |
| 3020 | : zoned_time(_Traits::locate_zone(__name), __tp) | |
| 3021 | { } | |
| 1736bf5a | 3022 | |
| 9fc61d45 JW |
3023 | zoned_time(_TimeZonePtr __z, const local_time<_Duration>& __tp, |
| 3024 | choose __c) | |
| 3025 | requires requires { | |
| 3026 | { __z->to_sys(__tp, __c) } -> convertible_to<sys_time<_Duration>>; | |
| 3027 | } | |
| 3028 | : _M_zone(std::move(__z)), _M_tp(_M_zone->to_sys(__tp, __c)) | |
| 3029 | { } | |
| 1736bf5a | 3030 | |
| 9fc61d45 JW |
3031 | zoned_time(string_view __name, const local_time<_Duration>& __tp, |
| 3032 | choose __c) | |
| 3033 | requires requires (_TimeZonePtr __z) { | |
| 3034 | { _Traits::locate_zone(__name) } -> convertible_to<_TimeZonePtr>; | |
| 3035 | { __z->to_sys(__tp, __c) } -> convertible_to<sys_time<_Duration>>; | |
| 3036 | } | |
| 3037 | : _M_zone(_Traits::locate_zone(__name)), | |
| 3038 | _M_tp(_M_zone->to_sys(__tp, __c)) | |
| 3039 | { } | |
| 1736bf5a | 3040 | |
| 9fc61d45 JW |
3041 | template<typename _Duration2, typename _TimeZonePtr2> |
| 3042 | zoned_time(_TimeZonePtr __z, | |
| 3043 | const zoned_time<_Duration2, _TimeZonePtr2>& __zt) | |
| 3044 | requires is_convertible_v<sys_time<_Duration2>, sys_time<_Duration>> | |
| 3045 | : _M_zone(__z), _M_tp(__zt._M_tp) | |
| 3046 | { } | |
| 3047 | ||
| 3048 | template<typename _Duration2, typename _TimeZonePtr2> | |
| 3049 | zoned_time(_TimeZonePtr __z, | |
| 3050 | const zoned_time<_Duration2, _TimeZonePtr2>& __zt, | |
| af89c779 | 3051 | choose) |
| 9fc61d45 JW |
3052 | requires is_convertible_v<sys_time<_Duration2>, sys_time<_Duration>> |
| 3053 | : _M_zone(__z), _M_tp(__zt._M_tp) | |
| 3054 | { } | |
| 3055 | ||
| 3056 | template<typename _Duration2, typename _TimeZonePtr2> | |
| 3057 | zoned_time(string_view __name, | |
| 3058 | const zoned_time<_Duration2, _TimeZonePtr2>& __zt) | |
| 3059 | requires is_convertible_v<sys_time<_Duration2>, sys_time<_Duration>> | |
| 3060 | && requires { | |
| 3061 | { _Traits::locate_zone(__name) } -> convertible_to<_TimeZonePtr>; | |
| 3062 | } | |
| 3063 | : _M_zone(_Traits::locate_zone(__name)), _M_tp(__zt._M_tp) | |
| 3064 | { } | |
| 3065 | ||
| 3066 | template<typename _Duration2, typename _TimeZonePtr2> | |
| 3067 | zoned_time(string_view __name, | |
| 3068 | const zoned_time<_Duration2, _TimeZonePtr2>& __zt, | |
| af89c779 | 3069 | choose) |
| 9fc61d45 JW |
3070 | requires is_convertible_v<sys_time<_Duration2>, sys_time<_Duration>> |
| 3071 | && requires { | |
| 3072 | { _Traits::locate_zone(__name) } -> convertible_to<_TimeZonePtr>; | |
| 3073 | } | |
| 3074 | : _M_zone(_Traits::locate_zone(__name)), _M_tp(__zt._M_tp) | |
| 3075 | { } | |
| 1736bf5a | 3076 | |
| 9fc61d45 JW |
3077 | zoned_time& |
| 3078 | operator=(const sys_time<_Duration>& __st) | |
| 3079 | { | |
| 3080 | _M_tp = __st; | |
| 3081 | return *this; | |
| 3082 | } | |
| 3083 | ||
| 3084 | zoned_time& | |
| 3085 | operator=(const local_time<_Duration>& __lt) | |
| 3086 | { | |
| 3087 | _M_tp = _M_zone->to_sys(__lt); | |
| 3088 | return *this; | |
| 3089 | } | |
| 3090 | ||
| 3091 | [[nodiscard]] | |
| 3092 | operator sys_time<duration>() const { return _M_tp; } | |
| 3093 | ||
| 3094 | [[nodiscard]] | |
| 3095 | explicit operator local_time<duration>() const | |
| 3096 | { return get_local_time(); } | |
| 3097 | ||
| 3098 | [[nodiscard]] | |
| 3099 | _TimeZonePtr | |
| 3100 | get_time_zone() const | |
| 3101 | { return _M_zone; } | |
| 3102 | ||
| 3103 | [[nodiscard]] | |
| 3104 | local_time<duration> | |
| 3105 | get_local_time() const | |
| 3106 | { return _M_zone->to_local(_M_tp); } | |
| 3107 | ||
| 3108 | [[nodiscard]] | |
| 3109 | sys_time<duration> | |
| 3110 | get_sys_time() const | |
| 3111 | { return _M_tp; } | |
| 3112 | ||
| 3113 | [[nodiscard]] | |
| 3114 | sys_info | |
| 3115 | get_info() const | |
| 3116 | { return _M_zone->get_info(_M_tp); } | |
| 3117 | ||
| 3118 | [[nodiscard]] friend bool | |
| 3119 | operator==(const zoned_time&, const zoned_time&) = default; | |
| 3120 | ||
| 3121 | private: | |
| 3122 | _TimeZonePtr _M_zone{ _Traits::default_zone() }; | |
| 3123 | sys_time<duration> _M_tp{}; | |
| 3124 | ||
| 3125 | template<typename _Duration2, typename _TimeZonePtr2> | |
| 3126 | friend class zoned_time; | |
| 3127 | }; | |
| 3128 | ||
| 3129 | zoned_time() -> zoned_time<seconds>; | |
| 3130 | ||
| 3131 | template<typename _Duration> | |
| 3132 | zoned_time(sys_time<_Duration>) | |
| 3133 | -> zoned_time<common_type_t<_Duration, seconds>>; | |
| 3134 | ||
| 3135 | /// @cond undocumented | |
| 3136 | template<typename _TimeZonePtrOrName> | |
| 3137 | using __time_zone_representation | |
| 3138 | = __conditional_t<is_convertible_v<_TimeZonePtrOrName, string_view>, | |
| 3139 | const time_zone*, | |
| 3140 | remove_cvref_t<_TimeZonePtrOrName>>; | |
| 3141 | /// @endcond | |
| 3142 | ||
| 3143 | template<typename _TimeZonePtrOrName> | |
| 3144 | zoned_time(_TimeZonePtrOrName&&) | |
| 3145 | -> zoned_time<seconds, __time_zone_representation<_TimeZonePtrOrName>>; | |
| 3146 | ||
| 3147 | template<typename _TimeZonePtrOrName, typename _Duration> | |
| 3148 | zoned_time(_TimeZonePtrOrName&&, sys_time<_Duration>) | |
| 3149 | -> zoned_time<common_type_t<_Duration, seconds>, | |
| 3150 | __time_zone_representation<_TimeZonePtrOrName>>; | |
| 3151 | ||
| 3152 | template<typename _TimeZonePtrOrName, typename _Duration> | |
| 3153 | zoned_time(_TimeZonePtrOrName&&, local_time<_Duration>, | |
| 3154 | choose = choose::earliest) | |
| 3155 | -> zoned_time<common_type_t<_Duration, seconds>, | |
| 3156 | __time_zone_representation<_TimeZonePtrOrName>>; | |
| 3157 | ||
| 3158 | template<typename _Duration, typename _TimeZonePtrOrName, | |
| 3159 | typename _TimeZonePtr2> | |
| 3160 | zoned_time(_TimeZonePtrOrName&&, zoned_time<_Duration, _TimeZonePtr2>, | |
| 3161 | choose = choose::earliest) | |
| 3162 | -> zoned_time<common_type_t<_Duration, seconds>, | |
| 3163 | __time_zone_representation<_TimeZonePtrOrName>>; | |
| 3164 | ||
| 3165 | template<typename _Dur1, typename _TZPtr1, typename _Dur2, typename _TZPtr2> | |
| 3166 | [[nodiscard]] | |
| 3167 | inline bool | |
| 3168 | operator==(const zoned_time<_Dur1, _TZPtr1>& __x, | |
| 3169 | const zoned_time<_Dur2, _TZPtr2>& __y) | |
| 3170 | { | |
| 3171 | return __x.get_time_zone() == __y.get_time_zone() | |
| 3172 | && __x.get_sys_time() == __y.get_sys_time(); | |
| 3173 | } | |
| 1736bf5a JW |
3174 | |
| 3175 | using zoned_seconds = zoned_time<seconds>; | |
| 9fc61d45 JW |
3176 | #endif // _GLIBCXX_USE_CXX11_ABI || ! _GLIBCXX_USE_DUAL_ABI |
| 3177 | ||
| 3178 | namespace __detail | |
| 3179 | { | |
| 3180 | inline leap_second_info | |
| 3181 | __get_leap_second_info(sys_seconds __ss, bool __is_utc) | |
| 3182 | { | |
| 3183 | if (__ss < sys_seconds{}) [[unlikely]] | |
| 3184 | return {}; | |
| 3185 | ||
| 3186 | const seconds::rep __leaps[] { | |
| 3187 | 78796800, // 1 Jul 1972 | |
| 3188 | 94694400, // 1 Jan 1973 | |
| 3189 | 126230400, // 1 Jan 1974 | |
| 3190 | 157766400, // 1 Jan 1975 | |
| 3191 | 189302400, // 1 Jan 1976 | |
| 3192 | 220924800, // 1 Jan 1977 | |
| 3193 | 252460800, // 1 Jan 1978 | |
| 3194 | 283996800, // 1 Jan 1979 | |
| 3195 | 315532800, // 1 Jan 1980 | |
| 3196 | 362793600, // 1 Jul 1981 | |
| 3197 | 394329600, // 1 Jul 1982 | |
| 3198 | 425865600, // 1 Jul 1983 | |
| 3199 | 489024000, // 1 Jul 1985 | |
| 3200 | 567993600, // 1 Jan 1988 | |
| 3201 | 631152000, // 1 Jan 1990 | |
| 3202 | 662688000, // 1 Jan 1991 | |
| 3203 | 709948800, // 1 Jul 1992 | |
| 3204 | 741484800, // 1 Jul 1993 | |
| 3205 | 773020800, // 1 Jul 1994 | |
| 3206 | 820454400, // 1 Jan 1996 | |
| 3207 | 867715200, // 1 Jul 1997 | |
| 3208 | 915148800, // 1 Jan 1999 | |
| 3209 | 1136073600, // 1 Jan 2006 | |
| 3210 | 1230768000, // 1 Jan 2009 | |
| 3211 | 1341100800, // 1 Jul 2012 | |
| 3212 | 1435708800, // 1 Jul 2015 | |
| 3213 | 1483228800, // 1 Jan 2017 | |
| 3214 | }; | |
| 3215 | // The list above is known to be valid until (at least) this date | |
| 3216 | // and only contains positive leap seconds. | |
| cf19ef9e | 3217 | const sys_seconds __expires(1703721600s); // 2023-12-28 00:00:00 UTC |
| 9fc61d45 JW |
3218 | |
| 3219 | #if _GLIBCXX_USE_CXX11_ABI || ! _GLIBCXX_USE_DUAL_ABI | |
| 3220 | if (__ss > __expires) | |
| 3221 | { | |
| 3222 | // Use updated leap_seconds from tzdb. | |
| 3223 | size_t __n = std::size(__leaps); | |
| 3224 | ||
| 3225 | auto __db = get_tzdb_list().begin(); | |
| 3226 | auto __first = __db->leap_seconds.begin() + __n; | |
| 3227 | auto __last = __db->leap_seconds.end(); | |
| 3228 | auto __pos = std::upper_bound(__first, __last, __ss); | |
| 3229 | seconds __elapsed(__n); | |
| 3230 | for (auto __i = __first; __i != __pos; ++__i) | |
| 3231 | __elapsed += __i->value(); | |
| 3232 | ||
| 3233 | if (__is_utc) | |
| 3234 | { | |
| 3235 | // Convert utc_time to sys_time: | |
| 3236 | __ss -= __elapsed; | |
| 3237 | // See if that sys_time is before (or during) previous leap sec: | |
| 3238 | if (__pos != __first && __ss < __pos[-1]) | |
| 3239 | { | |
| 3240 | if ((__ss + 1s) >= __pos[-1]) | |
| 3241 | return {true, __elapsed}; | |
| 3242 | __elapsed -= __pos[-1].value(); | |
| 3243 | } | |
| 3244 | } | |
| 3245 | return {false, __elapsed}; | |
| 3246 | } | |
| 3247 | else | |
| 3248 | #endif | |
| 3249 | { | |
| 3250 | seconds::rep __s = __ss.time_since_epoch().count(); | |
| 3251 | const seconds::rep* __first = std::begin(__leaps); | |
| 3252 | const seconds::rep* __last = std::end(__leaps); | |
| 3253 | ||
| 3254 | // Don't bother searching the list if we're after the last one. | |
| 3255 | if (__s > (__last[-1] + (__last - __first) + 1)) | |
| 3256 | return { false, seconds(__last - __first) }; | |
| 3257 | ||
| 3258 | auto __pos = std::upper_bound(__first, __last, __s); | |
| 3259 | seconds __elapsed{__pos - __first}; | |
| 3260 | if (__is_utc) | |
| 3261 | { | |
| 3262 | // Convert utc_time to sys_time: | |
| 3263 | __s -= __elapsed.count(); | |
| 3264 | // See if that sys_time is before (or during) previous leap sec: | |
| 3265 | if (__pos != __first && __s < __pos[-1]) | |
| 3266 | { | |
| 3267 | if ((__s + 1) >= __pos[-1]) | |
| 3268 | return {true, __elapsed}; | |
| 3269 | --__elapsed; | |
| 3270 | } | |
| 3271 | } | |
| 3272 | return {false, __elapsed}; | |
| 3273 | } | |
| 3274 | } | |
| 3275 | } // namespace __detail | |
| 1736bf5a JW |
3276 | |
| 3277 | template<typename _Duration> | |
| 9fc61d45 JW |
3278 | [[nodiscard]] |
| 3279 | inline leap_second_info | |
| 1736bf5a JW |
3280 | get_leap_second_info(const utc_time<_Duration>& __ut) |
| 3281 | { | |
| 9fc61d45 JW |
3282 | auto __s = chrono::duration_cast<seconds>(__ut.time_since_epoch()); |
| 3283 | return __detail::__get_leap_second_info(sys_seconds(__s), true); | |
| 3284 | } | |
| 1736bf5a | 3285 | |
| 9fc61d45 JW |
3286 | template<typename _Duration> |
| 3287 | [[nodiscard]] | |
| 3288 | inline utc_time<common_type_t<_Duration, seconds>> | |
| 3289 | utc_clock::from_sys(const sys_time<_Duration>& __t) | |
| 3290 | { | |
| 3291 | using _CDur = common_type_t<_Duration, seconds>; | |
| 3292 | auto __s = chrono::time_point_cast<seconds>(__t); | |
| 3293 | const auto __li = __detail::__get_leap_second_info(__s, false); | |
| 3294 | return utc_time<_CDur>{__t.time_since_epoch()} + __li.elapsed; | |
| 1736bf5a JW |
3295 | } |
| 3296 | ||
| f2ce64b5 | 3297 | /// @} group chrono |
| 7f78718b | 3298 | #endif // C++20 |
| f2ce64b5 | 3299 | } // namespace chrono |
| 04f69fda | 3300 | |
| 7f78718b JW |
3301 | #if __cplusplus >= 202002L |
| 3302 | inline namespace literals | |
| bf1fc37b | 3303 | { |
| 7f78718b JW |
3304 | inline namespace chrono_literals |
| 3305 | { | |
| 3306 | /// @addtogroup chrono | |
| 3307 | /// @{ | |
| 3308 | #pragma GCC diagnostic push | |
| 3309 | #pragma GCC diagnostic ignored "-Wliteral-suffix" | |
| 3310 | /// Literal suffix for creating chrono::day objects. | |
| 3311 | /// @since C++20 | |
| 3312 | constexpr chrono::day | |
| 3313 | operator""d(unsigned long long __d) noexcept | |
| 3314 | { return chrono::day{static_cast<unsigned>(__d)}; } | |
| bf1fc37b | 3315 | |
| 7f78718b JW |
3316 | /// Literal suffix for creating chrono::year objects. |
| 3317 | /// @since C++20 | |
| 3318 | constexpr chrono::year | |
| 3319 | operator""y(unsigned long long __y) noexcept | |
| 3320 | { return chrono::year{static_cast<int>(__y)}; } | |
| 3321 | #pragma GCC diagnostic pop | |
| 3322 | /// @} | |
| 3323 | } // inline namespace chrono_literals | |
| 3324 | } // inline namespace literals | |
| 3325 | #endif // C++20 | |
| 88c4d6b7 | 3326 | |
| 4a15d842 | 3327 | _GLIBCXX_END_NAMESPACE_VERSION |
| 1c9f675f ESR |
3328 | } // namespace std |
| 3329 | ||
| f99b9486 JW |
3330 | #if __cplusplus >= 202002L |
| 3331 | # include <bits/chrono_io.h> | |
| 3332 | #endif | |
| 3333 | ||
| 88c4d6b7 | 3334 | #endif // C++11 |
| 1c9f675f | 3335 | |
| 15e38d0d | 3336 | #endif //_GLIBCXX_CHRONO |