| 1 | // <chrono> -*- C++ -*- |
|---|---|
| 2 | |
| 3 | // Copyright (C) 2008-2021 Free Software Foundation, Inc. |
| 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 |
| 8 | // Free Software Foundation; either version 3, or (at your option) |
| 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 | |
| 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. |
| 19 | |
| 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/>. |
| 24 | |
| 25 | /** @file include/chrono |
| 26 | * This is a Standard C++ Library header. |
| 27 | * @ingroup chrono |
| 28 | */ |
| 29 | |
| 30 | #ifndef _GLIBCXX_CHRONO |
| 31 | #define _GLIBCXX_CHRONO 1 |
| 32 | |
| 33 | #pragma GCC system_header |
| 34 | |
| 35 | #if __cplusplus < 201103L |
| 36 | # include <bits/c++0x_warning.h> |
| 37 | #else |
| 38 | |
| 39 | #include <ratio> |
| 40 | #include <type_traits> |
| 41 | #include <limits> |
| 42 | #include <ctime> |
| 43 | #include <bits/parse_numbers.h> // for literals support. |
| 44 | #if __cplusplus > 201703L |
| 45 | # include <concepts> |
| 46 | # include <compare> |
| 47 | #endif |
| 48 | |
| 49 | namespace std _GLIBCXX_VISIBILITY(default) |
| 50 | { |
| 51 | _GLIBCXX_BEGIN_NAMESPACE_VERSION |
| 52 | |
| 53 | #if __cplusplus >= 201703L |
| 54 | namespace filesystem { struct __file_clock; }; |
| 55 | #endif |
| 56 | |
| 57 | /** |
| 58 | * @defgroup chrono Time |
| 59 | * @ingroup utilities |
| 60 | * |
| 61 | * Classes and functions for time. |
| 62 | * |
| 63 | * @since C++11 |
| 64 | */ |
| 65 | |
| 66 | /** @namespace std::chrono |
| 67 | * @brief ISO C++ 2011 namespace for date and time utilities |
| 68 | * @ingroup chrono |
| 69 | */ |
| 70 | namespace chrono |
| 71 | { |
| 72 | /// @addtogroup chrono |
| 73 | /// @{ |
| 74 | |
| 75 | /// `chrono::duration` represents a distance between two points in time |
| 76 | template<typename _Rep, typename _Period = ratio<1>> |
| 77 | struct duration; |
| 78 | |
| 79 | /// `chrono::time_point` represents a point in time as measured by a clock |
| 80 | template<typename _Clock, typename _Dur = typename _Clock::duration> |
| 81 | struct time_point; |
| 82 | /// @} |
| 83 | } |
| 84 | |
| 85 | /// @addtogroup chrono |
| 86 | /// @{ |
| 87 | |
| 88 | // 20.11.4.3 specialization of common_type (for duration, sfinae-friendly) |
| 89 | |
| 90 | /// @cond undocumented |
| 91 | |
| 92 | template<typename _CT, typename _Period1, typename _Period2, typename = void> |
| 93 | struct __duration_common_type |
| 94 | { }; |
| 95 | |
| 96 | template<typename _CT, typename _Period1, typename _Period2> |
| 97 | struct __duration_common_type<_CT, _Period1, _Period2, |
| 98 | __void_t<typename _CT::type>> |
| 99 | { |
| 100 | private: |
| 101 | using __gcd_num = __static_gcd<_Period1::num, _Period2::num>; |
| 102 | using __gcd_den = __static_gcd<_Period1::den, _Period2::den>; |
| 103 | using __cr = typename _CT::type; |
| 104 | using __r = ratio<__gcd_num::value, |
| 105 | (_Period1::den / __gcd_den::value) * _Period2::den>; |
| 106 | |
| 107 | public: |
| 108 | using type = chrono::duration<__cr, typename __r::type>; |
| 109 | }; |
| 110 | |
| 111 | /// @endcond |
| 112 | |
| 113 | /// @{ |
| 114 | /// @relates chrono::duration |
| 115 | |
| 116 | /// Specialization of common_type for chrono::duration types. |
| 117 | template<typename _Rep1, typename _Period1, typename _Rep2, typename _Period2> |
| 118 | struct common_type<chrono::duration<_Rep1, _Period1>, |
| 119 | chrono::duration<_Rep2, _Period2>> |
| 120 | : __duration_common_type<common_type<_Rep1, _Rep2>, |
| 121 | typename _Period1::type, |
| 122 | typename _Period2::type> |
| 123 | { }; |
| 124 | |
| 125 | /// Specialization of common_type for two identical chrono::duration types. |
| 126 | template<typename _Rep, typename _Period> |
| 127 | struct common_type<chrono::duration<_Rep, _Period>, |
| 128 | chrono::duration<_Rep, _Period>> |
| 129 | { |
| 130 | using type = chrono::duration<typename common_type<_Rep>::type, |
| 131 | typename _Period::type>; |
| 132 | }; |
| 133 | |
| 134 | /// Specialization of common_type for one chrono::duration type. |
| 135 | template<typename _Rep, typename _Period> |
| 136 | struct common_type<chrono::duration<_Rep, _Period>> |
| 137 | { |
| 138 | using type = chrono::duration<typename common_type<_Rep>::type, |
| 139 | typename _Period::type>; |
| 140 | }; |
| 141 | /// @} |
| 142 | |
| 143 | // 20.11.4.3 specialization of common_type (for time_point, sfinae-friendly) |
| 144 | |
| 145 | /// @cond undocumented |
| 146 | |
| 147 | template<typename _CT, typename _Clock, typename = void> |
| 148 | struct __timepoint_common_type |
| 149 | { }; |
| 150 | |
| 151 | template<typename _CT, typename _Clock> |
| 152 | struct __timepoint_common_type<_CT, _Clock, __void_t<typename _CT::type>> |
| 153 | { |
| 154 | using type = chrono::time_point<_Clock, typename _CT::type>; |
| 155 | }; |
| 156 | |
| 157 | /// @endcond |
| 158 | |
| 159 | /// @{ |
| 160 | /// @relates chrono::time_point |
| 161 | |
| 162 | /// Specialization of common_type for chrono::time_point types. |
| 163 | template<typename _Clock, typename _Duration1, typename _Duration2> |
| 164 | struct common_type<chrono::time_point<_Clock, _Duration1>, |
| 165 | chrono::time_point<_Clock, _Duration2>> |
| 166 | : __timepoint_common_type<common_type<_Duration1, _Duration2>, _Clock> |
| 167 | { }; |
| 168 | |
| 169 | /// Specialization of common_type for two identical chrono::time_point types. |
| 170 | template<typename _Clock, typename _Duration> |
| 171 | struct common_type<chrono::time_point<_Clock, _Duration>, |
| 172 | chrono::time_point<_Clock, _Duration>> |
| 173 | { using type = chrono::time_point<_Clock, _Duration>; }; |
| 174 | |
| 175 | /// Specialization of common_type for one chrono::time_point type. |
| 176 | template<typename _Clock, typename _Duration> |
| 177 | struct common_type<chrono::time_point<_Clock, _Duration>> |
| 178 | { using type = chrono::time_point<_Clock, _Duration>; }; |
| 179 | /// @} |
| 180 | |
| 181 | /// @} group chrono |
| 182 | |
| 183 | namespace chrono |
| 184 | { |
| 185 | /// @addtogroup chrono |
| 186 | /// @{ |
| 187 | |
| 188 | /// @cond undocumented |
| 189 | |
| 190 | // Primary template for duration_cast impl. |
| 191 | template<typename _ToDur, typename _CF, typename _CR, |
| 192 | bool _NumIsOne = false, bool _DenIsOne = false> |
| 193 | struct __duration_cast_impl |
| 194 | { |
| 195 | template<typename _Rep, typename _Period> |
| 196 | static constexpr _ToDur |
| 197 | __cast(const duration<_Rep, _Period>& __d) |
| 198 | { |
| 199 | typedef typename _ToDur::rep __to_rep; |
| 200 | return _ToDur(static_cast<__to_rep>(static_cast<_CR>(__d.count()) |
| 201 | * static_cast<_CR>(_CF::num) |
| 202 | / static_cast<_CR>(_CF::den))); |
| 203 | } |
| 204 | }; |
| 205 | |
| 206 | template<typename _ToDur, typename _CF, typename _CR> |
| 207 | struct __duration_cast_impl<_ToDur, _CF, _CR, true, true> |
| 208 | { |
| 209 | template<typename _Rep, typename _Period> |
| 210 | static constexpr _ToDur |
| 211 | __cast(const duration<_Rep, _Period>& __d) |
| 212 | { |
| 213 | typedef typename _ToDur::rep __to_rep; |
| 214 | return _ToDur(static_cast<__to_rep>(__d.count())); |
| 215 | } |
| 216 | }; |
| 217 | |
| 218 | template<typename _ToDur, typename _CF, typename _CR> |
| 219 | struct __duration_cast_impl<_ToDur, _CF, _CR, true, false> |
| 220 | { |
| 221 | template<typename _Rep, typename _Period> |
| 222 | static constexpr _ToDur |
| 223 | __cast(const duration<_Rep, _Period>& __d) |
| 224 | { |
| 225 | typedef typename _ToDur::rep __to_rep; |
| 226 | return _ToDur(static_cast<__to_rep>( |
| 227 | static_cast<_CR>(__d.count()) / static_cast<_CR>(_CF::den))); |
| 228 | } |
| 229 | }; |
| 230 | |
| 231 | template<typename _ToDur, typename _CF, typename _CR> |
| 232 | struct __duration_cast_impl<_ToDur, _CF, _CR, false, true> |
| 233 | { |
| 234 | template<typename _Rep, typename _Period> |
| 235 | static constexpr _ToDur |
| 236 | __cast(const duration<_Rep, _Period>& __d) |
| 237 | { |
| 238 | typedef typename _ToDur::rep __to_rep; |
| 239 | return _ToDur(static_cast<__to_rep>( |
| 240 | static_cast<_CR>(__d.count()) * static_cast<_CR>(_CF::num))); |
| 241 | } |
| 242 | }; |
| 243 | |
| 244 | template<typename _Tp> |
| 245 | struct __is_duration |
| 246 | : std::false_type |
| 247 | { }; |
| 248 | |
| 249 | template<typename _Rep, typename _Period> |
| 250 | struct __is_duration<duration<_Rep, _Period>> |
| 251 | : std::true_type |
| 252 | { }; |
| 253 | |
| 254 | template<typename _Tp> |
| 255 | using __enable_if_is_duration |
| 256 | = typename enable_if<__is_duration<_Tp>::value, _Tp>::type; |
| 257 | |
| 258 | template<typename _Tp> |
| 259 | using __disable_if_is_duration |
| 260 | = typename enable_if<!__is_duration<_Tp>::value, _Tp>::type; |
| 261 | |
| 262 | /// @endcond |
| 263 | |
| 264 | /// duration_cast |
| 265 | template<typename _ToDur, typename _Rep, typename _Period> |
| 266 | constexpr __enable_if_is_duration<_ToDur> |
| 267 | duration_cast(const duration<_Rep, _Period>& __d) |
| 268 | { |
| 269 | typedef typename _ToDur::period __to_period; |
| 270 | typedef typename _ToDur::rep __to_rep; |
| 271 | typedef ratio_divide<_Period, __to_period> __cf; |
| 272 | typedef typename common_type<__to_rep, _Rep, intmax_t>::type |
| 273 | __cr; |
| 274 | typedef __duration_cast_impl<_ToDur, __cf, __cr, |
| 275 | __cf::num == 1, __cf::den == 1> __dc; |
| 276 | return __dc::__cast(__d); |
| 277 | } |
| 278 | |
| 279 | /// treat_as_floating_point |
| 280 | template<typename _Rep> |
| 281 | struct treat_as_floating_point |
| 282 | : is_floating_point<_Rep> |
| 283 | { }; |
| 284 | |
| 285 | #if __cplusplus > 201402L |
| 286 | template <typename _Rep> |
| 287 | inline constexpr bool treat_as_floating_point_v = |
| 288 | treat_as_floating_point<_Rep>::value; |
| 289 | #endif // C++17 |
| 290 | |
| 291 | #if __cplusplus > 201703L |
| 292 | template<typename _Tp> |
| 293 | struct is_clock; |
| 294 | |
| 295 | template<typename _Tp> |
| 296 | inline constexpr bool is_clock_v = is_clock<_Tp>::value; |
| 297 | |
| 298 | #if __cpp_lib_concepts |
| 299 | template<typename _Tp> |
| 300 | struct is_clock : false_type |
| 301 | { }; |
| 302 | |
| 303 | template<typename _Tp> |
| 304 | requires requires { |
| 305 | typename _Tp::rep; |
| 306 | typename _Tp::period; |
| 307 | typename _Tp::duration; |
| 308 | typename _Tp::time_point::clock; |
| 309 | typename _Tp::time_point::duration; |
| 310 | { &_Tp::is_steady } -> same_as<const bool*>; |
| 311 | { _Tp::now() } -> same_as<typename _Tp::time_point>; |
| 312 | requires same_as<typename _Tp::duration, |
| 313 | duration<typename _Tp::rep, typename _Tp::period>>; |
| 314 | requires same_as<typename _Tp::time_point::duration, |
| 315 | typename _Tp::duration>; |
| 316 | } |
| 317 | struct is_clock<_Tp> : true_type |
| 318 | { }; |
| 319 | #else |
| 320 | template<typename _Tp, typename = void> |
| 321 | struct __is_clock_impl : false_type |
| 322 | { }; |
| 323 | |
| 324 | template<typename _Tp> |
| 325 | struct __is_clock_impl<_Tp, |
| 326 | void_t<typename _Tp::rep, typename _Tp::period, |
| 327 | typename _Tp::duration, |
| 328 | typename _Tp::time_point::duration, |
| 329 | decltype(_Tp::is_steady), |
| 330 | decltype(_Tp::now())>> |
| 331 | : __and_<is_same<typename _Tp::duration, |
| 332 | duration<typename _Tp::rep, typename _Tp::period>>, |
| 333 | is_same<typename _Tp::time_point::duration, |
| 334 | typename _Tp::duration>, |
| 335 | is_same<decltype(&_Tp::is_steady), const bool*>, |
| 336 | is_same<decltype(_Tp::now()), typename _Tp::time_point>>::type |
| 337 | { }; |
| 338 | |
| 339 | template<typename _Tp> |
| 340 | struct is_clock : __is_clock_impl<_Tp>::type |
| 341 | { }; |
| 342 | #endif |
| 343 | #endif // C++20 |
| 344 | |
| 345 | #if __cplusplus >= 201703L |
| 346 | # define __cpp_lib_chrono 201611 |
| 347 | |
| 348 | template<typename _ToDur, typename _Rep, typename _Period> |
| 349 | constexpr __enable_if_is_duration<_ToDur> |
| 350 | floor(const duration<_Rep, _Period>& __d) |
| 351 | { |
| 352 | auto __to = chrono::duration_cast<_ToDur>(__d); |
| 353 | if (__to > __d) |
| 354 | return __to - _ToDur{1}; |
| 355 | return __to; |
| 356 | } |
| 357 | |
| 358 | template<typename _ToDur, typename _Rep, typename _Period> |
| 359 | constexpr __enable_if_is_duration<_ToDur> |
| 360 | ceil(const duration<_Rep, _Period>& __d) |
| 361 | { |
| 362 | auto __to = chrono::duration_cast<_ToDur>(__d); |
| 363 | if (__to < __d) |
| 364 | return __to + _ToDur{1}; |
| 365 | return __to; |
| 366 | } |
| 367 | |
| 368 | template <typename _ToDur, typename _Rep, typename _Period> |
| 369 | constexpr enable_if_t< |
| 370 | __and_<__is_duration<_ToDur>, |
| 371 | __not_<treat_as_floating_point<typename _ToDur::rep>>>::value, |
| 372 | _ToDur> |
| 373 | round(const duration<_Rep, _Period>& __d) |
| 374 | { |
| 375 | _ToDur __t0 = chrono::floor<_ToDur>(__d); |
| 376 | _ToDur __t1 = __t0 + _ToDur{1}; |
| 377 | auto __diff0 = __d - __t0; |
| 378 | auto __diff1 = __t1 - __d; |
| 379 | if (__diff0 == __diff1) |
| 380 | { |
| 381 | if (__t0.count() & 1) |
| 382 | return __t1; |
| 383 | return __t0; |
| 384 | } |
| 385 | else if (__diff0 < __diff1) |
| 386 | return __t0; |
| 387 | return __t1; |
| 388 | } |
| 389 | |
| 390 | template<typename _Rep, typename _Period> |
| 391 | constexpr |
| 392 | enable_if_t<numeric_limits<_Rep>::is_signed, duration<_Rep, _Period>> |
| 393 | abs(duration<_Rep, _Period> __d) |
| 394 | { |
| 395 | if (__d >= __d.zero()) |
| 396 | return __d; |
| 397 | return -__d; |
| 398 | } |
| 399 | |
| 400 | // Make chrono::ceil<D> also usable as chrono::__detail::ceil<D>. |
| 401 | namespace __detail { using chrono::ceil; } |
| 402 | |
| 403 | #else // ! C++17 |
| 404 | |
| 405 | // We want to use ceil even when compiling for earlier standards versions. |
| 406 | // C++11 only allows a single statement in a constexpr function, so we |
| 407 | // need to move the comparison into a separate function, __ceil_impl. |
| 408 | namespace __detail |
| 409 | { |
| 410 | template<typename _Tp, typename _Up> |
| 411 | constexpr _Tp |
| 412 | __ceil_impl(const _Tp& __t, const _Up& __u) |
| 413 | { |
| 414 | return (__t < __u) ? (__t + _Tp{1}) : __t; |
| 415 | } |
| 416 | |
| 417 | // C++11-friendly version of std::chrono::ceil<D> for internal use. |
| 418 | template<typename _ToDur, typename _Rep, typename _Period> |
| 419 | constexpr _ToDur |
| 420 | ceil(const duration<_Rep, _Period>& __d) |
| 421 | { |
| 422 | return __detail::__ceil_impl(chrono::duration_cast<_ToDur>(__d), __d); |
| 423 | } |
| 424 | } |
| 425 | #endif // C++17 |
| 426 | |
| 427 | /// duration_values |
| 428 | template<typename _Rep> |
| 429 | struct duration_values |
| 430 | { |
| 431 | static constexpr _Rep |
| 432 | zero() noexcept |
| 433 | { return _Rep(0); } |
| 434 | |
| 435 | static constexpr _Rep |
| 436 | max() noexcept |
| 437 | { return numeric_limits<_Rep>::max(); } |
| 438 | |
| 439 | static constexpr _Rep |
| 440 | min() noexcept |
| 441 | { return numeric_limits<_Rep>::lowest(); } |
| 442 | }; |
| 443 | |
| 444 | /// @cond undocumented |
| 445 | |
| 446 | template<typename _Tp> |
| 447 | struct __is_ratio |
| 448 | : std::false_type |
| 449 | { }; |
| 450 | |
| 451 | template<intmax_t _Num, intmax_t _Den> |
| 452 | struct __is_ratio<ratio<_Num, _Den>> |
| 453 | : std::true_type |
| 454 | { }; |
| 455 | |
| 456 | /// @endcond |
| 457 | |
| 458 | template<typename _Rep, typename _Period> |
| 459 | struct duration |
| 460 | { |
| 461 | private: |
| 462 | template<typename _Rep2> |
| 463 | using __is_float = treat_as_floating_point<_Rep2>; |
| 464 | |
| 465 | static constexpr intmax_t |
| 466 | _S_gcd(intmax_t __m, intmax_t __n) noexcept |
| 467 | { |
| 468 | // Duration only allows positive periods so we don't need to |
| 469 | // handle negative values here (unlike __static_gcd and std::gcd). |
| 470 | #if __cplusplus >= 201402L |
| 471 | do |
| 472 | { |
| 473 | intmax_t __rem = __m % __n; |
| 474 | __m = __n; |
| 475 | __n = __rem; |
| 476 | } |
| 477 | while (__n != 0); |
| 478 | return __m; |
| 479 | #else |
| 480 | // C++11 doesn't allow loops in constexpr functions, but this |
| 481 | // recursive version can be more expensive to evaluate. |
| 482 | return (__n == 0) ? __m : _S_gcd(__n, __m % __n); |
| 483 | #endif |
| 484 | } |
| 485 | |
| 486 | // _GLIBCXX_RESOLVE_LIB_DEFECTS |
| 487 | // 2094. overflow shouldn't participate in overload resolution |
| 488 | // 3090. What is [2094] intended to mean? |
| 489 | // This only produces a valid type if no overflow occurs. |
| 490 | template<typename _R1, typename _R2, |
| 491 | intmax_t __gcd1 = _S_gcd(_R1::num, _R2::num), |
| 492 | intmax_t __gcd2 = _S_gcd(_R1::den, _R2::den)> |
| 493 | using __divide = ratio<(_R1::num / __gcd1) * (_R2::den / __gcd2), |
| 494 | (_R1::den / __gcd2) * (_R2::num / __gcd1)>; |
| 495 | |
| 496 | // _Period2 is an exact multiple of _Period |
| 497 | template<typename _Period2> |
| 498 | using __is_harmonic |
| 499 | = __bool_constant<__divide<_Period2, _Period>::den == 1>; |
| 500 | |
| 501 | public: |
| 502 | |
| 503 | using rep = _Rep; |
| 504 | using period = typename _Period::type; |
| 505 | |
| 506 | static_assert(!__is_duration<_Rep>::value, "rep cannot be a duration"); |
| 507 | static_assert(__is_ratio<_Period>::value, |
| 508 | "period must be a specialization of ratio"); |
| 509 | static_assert(_Period::num > 0, "period must be positive"); |
| 510 | |
| 511 | // 20.11.5.1 construction / copy / destroy |
| 512 | constexpr duration() = default; |
| 513 | |
| 514 | duration(const duration&) = default; |
| 515 | |
| 516 | // _GLIBCXX_RESOLVE_LIB_DEFECTS |
| 517 | // 3050. Conversion specification problem in chrono::duration |
| 518 | template<typename _Rep2, typename = _Require< |
| 519 | is_convertible<const _Rep2&, rep>, |
| 520 | __or_<__is_float<rep>, __not_<__is_float<_Rep2>>>>> |
| 521 | constexpr explicit duration(const _Rep2& __rep) |
| 522 | : __r(static_cast<rep>(__rep)) { } |
| 523 | |
| 524 | template<typename _Rep2, typename _Period2, typename = _Require< |
| 525 | is_convertible<const _Rep2&, rep>, |
| 526 | __or_<__is_float<rep>, |
| 527 | __and_<__is_harmonic<_Period2>, |
| 528 | __not_<__is_float<_Rep2>>>>>> |
| 529 | constexpr duration(const duration<_Rep2, _Period2>& __d) |
| 530 | : __r(duration_cast<duration>(__d).count()) { } |
| 531 | |
| 532 | ~duration() = default; |
| 533 | duration& operator=(const duration&) = default; |
| 534 | |
| 535 | // 20.11.5.2 observer |
| 536 | constexpr rep |
| 537 | count() const |
| 538 | { return __r; } |
| 539 | |
| 540 | // 20.11.5.3 arithmetic |
| 541 | |
| 542 | constexpr duration<typename common_type<rep>::type, period> |
| 543 | operator+() const |
| 544 | { return duration<typename common_type<rep>::type, period>(__r); } |
| 545 | |
| 546 | constexpr duration<typename common_type<rep>::type, period> |
| 547 | operator-() const |
| 548 | { return duration<typename common_type<rep>::type, period>(-__r); } |
| 549 | |
| 550 | _GLIBCXX17_CONSTEXPR duration& |
| 551 | operator++() |
| 552 | { |
| 553 | ++__r; |
| 554 | return *this; |
| 555 | } |
| 556 | |
| 557 | _GLIBCXX17_CONSTEXPR duration |
| 558 | operator++(int) |
| 559 | { return duration(__r++); } |
| 560 | |
| 561 | _GLIBCXX17_CONSTEXPR duration& |
| 562 | operator--() |
| 563 | { |
| 564 | --__r; |
| 565 | return *this; |
| 566 | } |
| 567 | |
| 568 | _GLIBCXX17_CONSTEXPR duration |
| 569 | operator--(int) |
| 570 | { return duration(__r--); } |
| 571 | |
| 572 | _GLIBCXX17_CONSTEXPR duration& |
| 573 | operator+=(const duration& __d) |
| 574 | { |
| 575 | __r += __d.count(); |
| 576 | return *this; |
| 577 | } |
| 578 | |
| 579 | _GLIBCXX17_CONSTEXPR duration& |
| 580 | operator-=(const duration& __d) |
| 581 | { |
| 582 | __r -= __d.count(); |
| 583 | return *this; |
| 584 | } |
| 585 | |
| 586 | _GLIBCXX17_CONSTEXPR duration& |
| 587 | operator*=(const rep& __rhs) |
| 588 | { |
| 589 | __r *= __rhs; |
| 590 | return *this; |
| 591 | } |
| 592 | |
| 593 | _GLIBCXX17_CONSTEXPR duration& |
| 594 | operator/=(const rep& __rhs) |
| 595 | { |
| 596 | __r /= __rhs; |
| 597 | return *this; |
| 598 | } |
| 599 | |
| 600 | // DR 934. |
| 601 | template<typename _Rep2 = rep> |
| 602 | _GLIBCXX17_CONSTEXPR |
| 603 | typename enable_if<!treat_as_floating_point<_Rep2>::value, |
| 604 | duration&>::type |
| 605 | operator%=(const rep& __rhs) |
| 606 | { |
| 607 | __r %= __rhs; |
| 608 | return *this; |
| 609 | } |
| 610 | |
| 611 | template<typename _Rep2 = rep> |
| 612 | _GLIBCXX17_CONSTEXPR |
| 613 | typename enable_if<!treat_as_floating_point<_Rep2>::value, |
| 614 | duration&>::type |
| 615 | operator%=(const duration& __d) |
| 616 | { |
| 617 | __r %= __d.count(); |
| 618 | return *this; |
| 619 | } |
| 620 | |
| 621 | // 20.11.5.4 special values |
| 622 | static constexpr duration |
| 623 | zero() noexcept |
| 624 | { return duration(duration_values<rep>::zero()); } |
| 625 | |
| 626 | static constexpr duration |
| 627 | min() noexcept |
| 628 | { return duration(duration_values<rep>::min()); } |
| 629 | |
| 630 | static constexpr duration |
| 631 | max() noexcept |
| 632 | { return duration(duration_values<rep>::max()); } |
| 633 | |
| 634 | private: |
| 635 | rep __r; |
| 636 | }; |
| 637 | |
| 638 | /// @{ |
| 639 | /// @relates std::chrono::duration |
| 640 | |
| 641 | /// The sum of two durations. |
| 642 | template<typename _Rep1, typename _Period1, |
| 643 | typename _Rep2, typename _Period2> |
| 644 | constexpr typename common_type<duration<_Rep1, _Period1>, |
| 645 | duration<_Rep2, _Period2>>::type |
| 646 | operator+(const duration<_Rep1, _Period1>& __lhs, |
| 647 | const duration<_Rep2, _Period2>& __rhs) |
| 648 | { |
| 649 | typedef duration<_Rep1, _Period1> __dur1; |
| 650 | typedef duration<_Rep2, _Period2> __dur2; |
| 651 | typedef typename common_type<__dur1,__dur2>::type __cd; |
| 652 | return __cd(__cd(__lhs).count() + __cd(__rhs).count()); |
| 653 | } |
| 654 | |
| 655 | /// The difference between two durations. |
| 656 | template<typename _Rep1, typename _Period1, |
| 657 | typename _Rep2, typename _Period2> |
| 658 | constexpr typename common_type<duration<_Rep1, _Period1>, |
| 659 | duration<_Rep2, _Period2>>::type |
| 660 | operator-(const duration<_Rep1, _Period1>& __lhs, |
| 661 | const duration<_Rep2, _Period2>& __rhs) |
| 662 | { |
| 663 | typedef duration<_Rep1, _Period1> __dur1; |
| 664 | typedef duration<_Rep2, _Period2> __dur2; |
| 665 | typedef typename common_type<__dur1,__dur2>::type __cd; |
| 666 | return __cd(__cd(__lhs).count() - __cd(__rhs).count()); |
| 667 | } |
| 668 | |
| 669 | /// @} |
| 670 | |
| 671 | /// @cond undocumented |
| 672 | |
| 673 | // SFINAE helper to obtain common_type<_Rep1, _Rep2> only if _Rep2 |
| 674 | // is implicitly convertible to it. |
| 675 | // _GLIBCXX_RESOLVE_LIB_DEFECTS |
| 676 | // 3050. Conversion specification problem in chrono::duration constructor |
| 677 | template<typename _Rep1, typename _Rep2, |
| 678 | typename _CRep = typename common_type<_Rep1, _Rep2>::type> |
| 679 | using __common_rep_t = typename |
| 680 | enable_if<is_convertible<const _Rep2&, _CRep>::value, _CRep>::type; |
| 681 | |
| 682 | /// @endcond |
| 683 | |
| 684 | /** @{ |
| 685 | * Arithmetic operators for chrono::duration |
| 686 | * @relates std::chrono::duration |
| 687 | */ |
| 688 | |
| 689 | template<typename _Rep1, typename _Period, typename _Rep2> |
| 690 | constexpr duration<__common_rep_t<_Rep1, _Rep2>, _Period> |
| 691 | operator*(const duration<_Rep1, _Period>& __d, const _Rep2& __s) |
| 692 | { |
| 693 | typedef duration<typename common_type<_Rep1, _Rep2>::type, _Period> |
| 694 | __cd; |
| 695 | return __cd(__cd(__d).count() * __s); |
| 696 | } |
| 697 | |
| 698 | template<typename _Rep1, typename _Rep2, typename _Period> |
| 699 | constexpr duration<__common_rep_t<_Rep2, _Rep1>, _Period> |
| 700 | operator*(const _Rep1& __s, const duration<_Rep2, _Period>& __d) |
| 701 | { return __d * __s; } |
| 702 | |
| 703 | template<typename _Rep1, typename _Period, typename _Rep2> |
| 704 | constexpr |
| 705 | duration<__common_rep_t<_Rep1, __disable_if_is_duration<_Rep2>>, _Period> |
| 706 | operator/(const duration<_Rep1, _Period>& __d, const _Rep2& __s) |
| 707 | { |
| 708 | typedef duration<typename common_type<_Rep1, _Rep2>::type, _Period> |
| 709 | __cd; |
| 710 | return __cd(__cd(__d).count() / __s); |
| 711 | } |
| 712 | |
| 713 | template<typename _Rep1, typename _Period1, |
| 714 | typename _Rep2, typename _Period2> |
| 715 | constexpr typename common_type<_Rep1, _Rep2>::type |
| 716 | operator/(const duration<_Rep1, _Period1>& __lhs, |
| 717 | const duration<_Rep2, _Period2>& __rhs) |
| 718 | { |
| 719 | typedef duration<_Rep1, _Period1> __dur1; |
| 720 | typedef duration<_Rep2, _Period2> __dur2; |
| 721 | typedef typename common_type<__dur1,__dur2>::type __cd; |
| 722 | return __cd(__lhs).count() / __cd(__rhs).count(); |
| 723 | } |
| 724 | |
| 725 | // DR 934. |
| 726 | template<typename _Rep1, typename _Period, typename _Rep2> |
| 727 | constexpr |
| 728 | duration<__common_rep_t<_Rep1, __disable_if_is_duration<_Rep2>>, _Period> |
| 729 | operator%(const duration<_Rep1, _Period>& __d, const _Rep2& __s) |
| 730 | { |
| 731 | typedef duration<typename common_type<_Rep1, _Rep2>::type, _Period> |
| 732 | __cd; |
| 733 | return __cd(__cd(__d).count() % __s); |
| 734 | } |
| 735 | |
| 736 | template<typename _Rep1, typename _Period1, |
| 737 | typename _Rep2, typename _Period2> |
| 738 | constexpr typename common_type<duration<_Rep1, _Period1>, |
| 739 | duration<_Rep2, _Period2>>::type |
| 740 | operator%(const duration<_Rep1, _Period1>& __lhs, |
| 741 | const duration<_Rep2, _Period2>& __rhs) |
| 742 | { |
| 743 | typedef duration<_Rep1, _Period1> __dur1; |
| 744 | typedef duration<_Rep2, _Period2> __dur2; |
| 745 | typedef typename common_type<__dur1,__dur2>::type __cd; |
| 746 | return __cd(__cd(__lhs).count() % __cd(__rhs).count()); |
| 747 | } |
| 748 | /// @} |
| 749 | |
| 750 | // comparisons |
| 751 | |
| 752 | /** @{ |
| 753 | * Comparisons for chrono::duration |
| 754 | * @relates std::chrono::duration |
| 755 | */ |
| 756 | |
| 757 | template<typename _Rep1, typename _Period1, |
| 758 | typename _Rep2, typename _Period2> |
| 759 | constexpr bool |
| 760 | operator==(const duration<_Rep1, _Period1>& __lhs, |
| 761 | const duration<_Rep2, _Period2>& __rhs) |
| 762 | { |
| 763 | typedef duration<_Rep1, _Period1> __dur1; |
| 764 | typedef duration<_Rep2, _Period2> __dur2; |
| 765 | typedef typename common_type<__dur1,__dur2>::type __ct; |
| 766 | return __ct(__lhs).count() == __ct(__rhs).count(); |
| 767 | } |
| 768 | |
| 769 | template<typename _Rep1, typename _Period1, |
| 770 | typename _Rep2, typename _Period2> |
| 771 | constexpr bool |
| 772 | operator<(const duration<_Rep1, _Period1>& __lhs, |
| 773 | const duration<_Rep2, _Period2>& __rhs) |
| 774 | { |
| 775 | typedef duration<_Rep1, _Period1> __dur1; |
| 776 | typedef duration<_Rep2, _Period2> __dur2; |
| 777 | typedef typename common_type<__dur1,__dur2>::type __ct; |
| 778 | return __ct(__lhs).count() < __ct(__rhs).count(); |
| 779 | } |
| 780 | |
| 781 | #if __cpp_lib_three_way_comparison |
| 782 | template<typename _Rep1, typename _Period1, |
| 783 | typename _Rep2, typename _Period2> |
| 784 | requires three_way_comparable<common_type_t<_Rep1, _Rep2>> |
| 785 | constexpr auto |
| 786 | operator<=>(const duration<_Rep1, _Period1>& __lhs, |
| 787 | const duration<_Rep2, _Period2>& __rhs) |
| 788 | { |
| 789 | using __ct = common_type_t<duration<_Rep1, _Period1>, |
| 790 | duration<_Rep2, _Period2>>; |
| 791 | return __ct(__lhs).count() <=> __ct(__rhs).count(); |
| 792 | } |
| 793 | #else |
| 794 | template<typename _Rep1, typename _Period1, |
| 795 | typename _Rep2, typename _Period2> |
| 796 | constexpr bool |
| 797 | operator!=(const duration<_Rep1, _Period1>& __lhs, |
| 798 | const duration<_Rep2, _Period2>& __rhs) |
| 799 | { return !(__lhs == __rhs); } |
| 800 | #endif |
| 801 | |
| 802 | template<typename _Rep1, typename _Period1, |
| 803 | typename _Rep2, typename _Period2> |
| 804 | constexpr bool |
| 805 | operator<=(const duration<_Rep1, _Period1>& __lhs, |
| 806 | const duration<_Rep2, _Period2>& __rhs) |
| 807 | { return !(__rhs < __lhs); } |
| 808 | |
| 809 | template<typename _Rep1, typename _Period1, |
| 810 | typename _Rep2, typename _Period2> |
| 811 | constexpr bool |
| 812 | operator>(const duration<_Rep1, _Period1>& __lhs, |
| 813 | const duration<_Rep2, _Period2>& __rhs) |
| 814 | { return __rhs < __lhs; } |
| 815 | |
| 816 | template<typename _Rep1, typename _Period1, |
| 817 | typename _Rep2, typename _Period2> |
| 818 | constexpr bool |
| 819 | operator>=(const duration<_Rep1, _Period1>& __lhs, |
| 820 | const duration<_Rep2, _Period2>& __rhs) |
| 821 | { return !(__lhs < __rhs); } |
| 822 | |
| 823 | /// @} |
| 824 | |
| 825 | /// @cond undocumented |
| 826 | #ifdef _GLIBCXX_USE_C99_STDINT_TR1 |
| 827 | # define _GLIBCXX_CHRONO_INT64_T int64_t |
| 828 | #elif defined __INT64_TYPE__ |
| 829 | # define _GLIBCXX_CHRONO_INT64_T __INT64_TYPE__ |
| 830 | #else |
| 831 | static_assert(std::numeric_limits<unsigned long long>::digits >= 64, |
| 832 | "Representation type for nanoseconds must have at least 64 bits"); |
| 833 | # define _GLIBCXX_CHRONO_INT64_T long long |
| 834 | #endif |
| 835 | /// @endcond |
| 836 | |
| 837 | /// nanoseconds |
| 838 | using nanoseconds = duration<_GLIBCXX_CHRONO_INT64_T, nano>; |
| 839 | |
| 840 | /// microseconds |
| 841 | using microseconds = duration<_GLIBCXX_CHRONO_INT64_T, micro>; |
| 842 | |
| 843 | /// milliseconds |
| 844 | using milliseconds = duration<_GLIBCXX_CHRONO_INT64_T, milli>; |
| 845 | |
| 846 | /// seconds |
| 847 | using seconds = duration<_GLIBCXX_CHRONO_INT64_T>; |
| 848 | |
| 849 | /// minutes |
| 850 | using minutes = duration<_GLIBCXX_CHRONO_INT64_T, ratio< 60>>; |
| 851 | |
| 852 | /// hours |
| 853 | using hours = duration<_GLIBCXX_CHRONO_INT64_T, ratio<3600>>; |
| 854 | |
| 855 | #if __cplusplus > 201703L |
| 856 | /// days |
| 857 | using days = duration<_GLIBCXX_CHRONO_INT64_T, ratio<86400>>; |
| 858 | |
| 859 | /// weeks |
| 860 | using weeks = duration<_GLIBCXX_CHRONO_INT64_T, ratio<604800>>; |
| 861 | |
| 862 | /// years |
| 863 | using years = duration<_GLIBCXX_CHRONO_INT64_T, ratio<31556952>>; |
| 864 | |
| 865 | /// months |
| 866 | using months = duration<_GLIBCXX_CHRONO_INT64_T, ratio<2629746>>; |
| 867 | #endif // C++20 |
| 868 | |
| 869 | #undef _GLIBCXX_CHRONO_INT64_T |
| 870 | |
| 871 | template<typename _Clock, typename _Dur> |
| 872 | struct time_point |
| 873 | { |
| 874 | static_assert(__is_duration<_Dur>::value, |
| 875 | "duration must be a specialization of std::chrono::duration"); |
| 876 | |
| 877 | typedef _Clock clock; |
| 878 | typedef _Dur duration; |
| 879 | typedef typename duration::rep rep; |
| 880 | typedef typename duration::period period; |
| 881 | |
| 882 | constexpr time_point() : __d(duration::zero()) |
| 883 | { } |
| 884 | |
| 885 | constexpr explicit time_point(const duration& __dur) |
| 886 | : __d(__dur) |
| 887 | { } |
| 888 | |
| 889 | // conversions |
| 890 | template<typename _Dur2, |
| 891 | typename = _Require<is_convertible<_Dur2, _Dur>>> |
| 892 | constexpr time_point(const time_point<clock, _Dur2>& __t) |
| 893 | : __d(__t.time_since_epoch()) |
| 894 | { } |
| 895 | |
| 896 | // observer |
| 897 | constexpr duration |
| 898 | time_since_epoch() const |
| 899 | { return __d; } |
| 900 | |
| 901 | #if __cplusplus > 201703L |
| 902 | constexpr time_point& |
| 903 | operator++() |
| 904 | { |
| 905 | ++__d; |
| 906 | return *this; |
| 907 | } |
| 908 | |
| 909 | constexpr time_point |
| 910 | operator++(int) |
| 911 | { return time_point{__d++}; } |
| 912 | |
| 913 | constexpr time_point& |
| 914 | operator--() |
| 915 | { |
| 916 | --__d; |
| 917 | return *this; |
| 918 | } |
| 919 | |
| 920 | constexpr time_point |
| 921 | operator--(int) |
| 922 | { return time_point{__d--}; } |
| 923 | #endif |
| 924 | |
| 925 | // arithmetic |
| 926 | _GLIBCXX17_CONSTEXPR time_point& |
| 927 | operator+=(const duration& __dur) |
| 928 | { |
| 929 | __d += __dur; |
| 930 | return *this; |
| 931 | } |
| 932 | |
| 933 | _GLIBCXX17_CONSTEXPR time_point& |
| 934 | operator-=(const duration& __dur) |
| 935 | { |
| 936 | __d -= __dur; |
| 937 | return *this; |
| 938 | } |
| 939 | |
| 940 | // special values |
| 941 | static constexpr time_point |
| 942 | min() noexcept |
| 943 | { return time_point(duration::min()); } |
| 944 | |
| 945 | static constexpr time_point |
| 946 | max() noexcept |
| 947 | { return time_point(duration::max()); } |
| 948 | |
| 949 | private: |
| 950 | duration __d; |
| 951 | }; |
| 952 | |
| 953 | /// time_point_cast |
| 954 | template<typename _ToDur, typename _Clock, typename _Dur> |
| 955 | constexpr typename enable_if<__is_duration<_ToDur>::value, |
| 956 | time_point<_Clock, _ToDur>>::type |
| 957 | time_point_cast(const time_point<_Clock, _Dur>& __t) |
| 958 | { |
| 959 | typedef time_point<_Clock, _ToDur> __time_point; |
| 960 | return __time_point(duration_cast<_ToDur>(__t.time_since_epoch())); |
| 961 | } |
| 962 | |
| 963 | #if __cplusplus > 201402L |
| 964 | template<typename _ToDur, typename _Clock, typename _Dur> |
| 965 | constexpr |
| 966 | enable_if_t<__is_duration<_ToDur>::value, time_point<_Clock, _ToDur>> |
| 967 | floor(const time_point<_Clock, _Dur>& __tp) |
| 968 | { |
| 969 | return time_point<_Clock, _ToDur>{ |
| 970 | chrono::floor<_ToDur>(__tp.time_since_epoch())}; |
| 971 | } |
| 972 | |
| 973 | template<typename _ToDur, typename _Clock, typename _Dur> |
| 974 | constexpr |
| 975 | enable_if_t<__is_duration<_ToDur>::value, time_point<_Clock, _ToDur>> |
| 976 | ceil(const time_point<_Clock, _Dur>& __tp) |
| 977 | { |
| 978 | return time_point<_Clock, _ToDur>{ |
| 979 | chrono::ceil<_ToDur>(__tp.time_since_epoch())}; |
| 980 | } |
| 981 | |
| 982 | template<typename _ToDur, typename _Clock, typename _Dur> |
| 983 | constexpr enable_if_t< |
| 984 | __and_<__is_duration<_ToDur>, |
| 985 | __not_<treat_as_floating_point<typename _ToDur::rep>>>::value, |
| 986 | time_point<_Clock, _ToDur>> |
| 987 | round(const time_point<_Clock, _Dur>& __tp) |
| 988 | { |
| 989 | return time_point<_Clock, _ToDur>{ |
| 990 | chrono::round<_ToDur>(__tp.time_since_epoch())}; |
| 991 | } |
| 992 | #endif // C++17 |
| 993 | |
| 994 | /// @{ |
| 995 | /// @relates time_point |
| 996 | |
| 997 | /// Adjust a time point forwards by the given duration. |
| 998 | template<typename _Clock, typename _Dur1, |
| 999 | typename _Rep2, typename _Period2> |
| 1000 | constexpr time_point<_Clock, |
| 1001 | typename common_type<_Dur1, duration<_Rep2, _Period2>>::type> |
| 1002 | operator+(const time_point<_Clock, _Dur1>& __lhs, |
| 1003 | const duration<_Rep2, _Period2>& __rhs) |
| 1004 | { |
| 1005 | typedef duration<_Rep2, _Period2> __dur2; |
| 1006 | typedef typename common_type<_Dur1,__dur2>::type __ct; |
| 1007 | typedef time_point<_Clock, __ct> __time_point; |
| 1008 | return __time_point(__lhs.time_since_epoch() + __rhs); |
| 1009 | } |
| 1010 | |
| 1011 | /// Adjust a time point forwards by the given duration. |
| 1012 | template<typename _Rep1, typename _Period1, |
| 1013 | typename _Clock, typename _Dur2> |
| 1014 | constexpr time_point<_Clock, |
| 1015 | typename common_type<duration<_Rep1, _Period1>, _Dur2>::type> |
| 1016 | operator+(const duration<_Rep1, _Period1>& __lhs, |
| 1017 | const time_point<_Clock, _Dur2>& __rhs) |
| 1018 | { |
| 1019 | typedef duration<_Rep1, _Period1> __dur1; |
| 1020 | typedef typename common_type<__dur1,_Dur2>::type __ct; |
| 1021 | typedef time_point<_Clock, __ct> __time_point; |
| 1022 | return __time_point(__rhs.time_since_epoch() + __lhs); |
| 1023 | } |
| 1024 | |
| 1025 | /// Adjust a time point backwards by the given duration. |
| 1026 | template<typename _Clock, typename _Dur1, |
| 1027 | typename _Rep2, typename _Period2> |
| 1028 | constexpr time_point<_Clock, |
| 1029 | typename common_type<_Dur1, duration<_Rep2, _Period2>>::type> |
| 1030 | operator-(const time_point<_Clock, _Dur1>& __lhs, |
| 1031 | const duration<_Rep2, _Period2>& __rhs) |
| 1032 | { |
| 1033 | typedef duration<_Rep2, _Period2> __dur2; |
| 1034 | typedef typename common_type<_Dur1,__dur2>::type __ct; |
| 1035 | typedef time_point<_Clock, __ct> __time_point; |
| 1036 | return __time_point(__lhs.time_since_epoch() -__rhs); |
| 1037 | } |
| 1038 | |
| 1039 | /// The difference between two time points (as a duration) |
| 1040 | template<typename _Clock, typename _Dur1, typename _Dur2> |
| 1041 | constexpr typename common_type<_Dur1, _Dur2>::type |
| 1042 | operator-(const time_point<_Clock, _Dur1>& __lhs, |
| 1043 | const time_point<_Clock, _Dur2>& __rhs) |
| 1044 | { return __lhs.time_since_epoch() - __rhs.time_since_epoch(); } |
| 1045 | /// @} |
| 1046 | |
| 1047 | /** @{ |
| 1048 | * Comparisons for time_point |
| 1049 | * @relates chrono::time_point |
| 1050 | */ |
| 1051 | |
| 1052 | template<typename _Clock, typename _Dur1, typename _Dur2> |
| 1053 | constexpr bool |
| 1054 | operator==(const time_point<_Clock, _Dur1>& __lhs, |
| 1055 | const time_point<_Clock, _Dur2>& __rhs) |
| 1056 | { return __lhs.time_since_epoch() == __rhs.time_since_epoch(); } |
| 1057 | |
| 1058 | #if __cpp_lib_three_way_comparison |
| 1059 | template<typename _Clock, typename _Dur1, |
| 1060 | three_way_comparable_with<_Dur1> _Dur2> |
| 1061 | constexpr auto |
| 1062 | operator<=>(const time_point<_Clock, _Dur1>& __lhs, |
| 1063 | const time_point<_Clock, _Dur2>& __rhs) |
| 1064 | { return __lhs.time_since_epoch() <=> __rhs.time_since_epoch(); } |
| 1065 | #else |
| 1066 | template<typename _Clock, typename _Dur1, typename _Dur2> |
| 1067 | constexpr bool |
| 1068 | operator!=(const time_point<_Clock, _Dur1>& __lhs, |
| 1069 | const time_point<_Clock, _Dur2>& __rhs) |
| 1070 | { return !(__lhs == __rhs); } |
| 1071 | #endif |
| 1072 | |
| 1073 | template<typename _Clock, typename _Dur1, typename _Dur2> |
| 1074 | constexpr bool |
| 1075 | operator<(const time_point<_Clock, _Dur1>& __lhs, |
| 1076 | const time_point<_Clock, _Dur2>& __rhs) |
| 1077 | { return __lhs.time_since_epoch() < __rhs.time_since_epoch(); } |
| 1078 | |
| 1079 | template<typename _Clock, typename _Dur1, typename _Dur2> |
| 1080 | constexpr bool |
| 1081 | operator<=(const time_point<_Clock, _Dur1>& __lhs, |
| 1082 | const time_point<_Clock, _Dur2>& __rhs) |
| 1083 | { return !(__rhs < __lhs); } |
| 1084 | |
| 1085 | template<typename _Clock, typename _Dur1, typename _Dur2> |
| 1086 | constexpr bool |
| 1087 | operator>(const time_point<_Clock, _Dur1>& __lhs, |
| 1088 | const time_point<_Clock, _Dur2>& __rhs) |
| 1089 | { return __rhs < __lhs; } |
| 1090 | |
| 1091 | template<typename _Clock, typename _Dur1, typename _Dur2> |
| 1092 | constexpr bool |
| 1093 | operator>=(const time_point<_Clock, _Dur1>& __lhs, |
| 1094 | const time_point<_Clock, _Dur2>& __rhs) |
| 1095 | { return !(__lhs < __rhs); } |
| 1096 | |
| 1097 | /// @} |
| 1098 | |
| 1099 | // Clocks. |
| 1100 | |
| 1101 | // Why nanosecond resolution as the default? |
| 1102 | // Why have std::system_clock always count in the highest |
| 1103 | // resolution (ie nanoseconds), even if on some OSes the low 3 |
| 1104 | // or 9 decimal digits will be always zero? This allows later |
| 1105 | // implementations to change the system_clock::now() |
| 1106 | // implementation any time to provide better resolution without |
| 1107 | // changing function signature or units. |
| 1108 | |
| 1109 | // To support the (forward) evolution of the library's defined |
| 1110 | // clocks, wrap inside inline namespace so that the current |
| 1111 | // defintions of system_clock, steady_clock, and |
| 1112 | // high_resolution_clock types are uniquely mangled. This way, new |
| 1113 | // code can use the latests clocks, while the library can contain |
| 1114 | // compatibility definitions for previous versions. At some |
| 1115 | // point, when these clocks settle down, the inlined namespaces |
| 1116 | // can be removed. XXX GLIBCXX_ABI Deprecated |
| 1117 | inline namespace _V2 { |
| 1118 | |
| 1119 | /** |
| 1120 | * @brief System clock. |
| 1121 | * |
| 1122 | * Time returned represents wall time from the system-wide clock. |
| 1123 | * @ingroup chrono |
| 1124 | */ |
| 1125 | struct system_clock |
| 1126 | { |
| 1127 | typedef chrono::nanoseconds duration; |
| 1128 | typedef duration::rep rep; |
| 1129 | typedef duration::period period; |
| 1130 | typedef chrono::time_point<system_clock, duration> time_point; |
| 1131 | |
| 1132 | static_assert(system_clock::duration::min() |
| 1133 | < system_clock::duration::zero(), |
| 1134 | "a clock's minimum duration cannot be less than its epoch"); |
| 1135 | |
| 1136 | static constexpr bool is_steady = false; |
| 1137 | |
| 1138 | static time_point |
| 1139 | now() noexcept; |
| 1140 | |
| 1141 | // Map to C API |
| 1142 | static std::time_t |
| 1143 | to_time_t(const time_point& __t) noexcept |
| 1144 | { |
| 1145 | return std::time_t(duration_cast<chrono::seconds> |
| 1146 | (__t.time_since_epoch()).count()); |
| 1147 | } |
| 1148 | |
| 1149 | static time_point |
| 1150 | from_time_t(std::time_t __t) noexcept |
| 1151 | { |
| 1152 | typedef chrono::time_point<system_clock, seconds> __from; |
| 1153 | return time_point_cast<system_clock::duration> |
| 1154 | (__from(chrono::seconds(__t))); |
| 1155 | } |
| 1156 | }; |
| 1157 | |
| 1158 | |
| 1159 | /** |
| 1160 | * @brief Monotonic clock |
| 1161 | * |
| 1162 | * Time returned has the property of only increasing at a uniform rate. |
| 1163 | * @ingroup chrono |
| 1164 | */ |
| 1165 | struct steady_clock |
| 1166 | { |
| 1167 | typedef chrono::nanoseconds duration; |
| 1168 | typedef duration::rep rep; |
| 1169 | typedef duration::period period; |
| 1170 | typedef chrono::time_point<steady_clock, duration> time_point; |
| 1171 | |
| 1172 | static constexpr bool is_steady = true; |
| 1173 | |
| 1174 | static time_point |
| 1175 | now() noexcept; |
| 1176 | }; |
| 1177 | |
| 1178 | |
| 1179 | /** |
| 1180 | * @brief Highest-resolution clock |
| 1181 | * |
| 1182 | * This is the clock "with the shortest tick period." Alias to |
| 1183 | * std::system_clock until higher-than-nanosecond definitions |
| 1184 | * become feasible. |
| 1185 | * @ingroup chrono |
| 1186 | */ |
| 1187 | using high_resolution_clock = system_clock; |
| 1188 | |
| 1189 | } // end inline namespace _V2 |
| 1190 | |
| 1191 | #if __cplusplus > 201703L |
| 1192 | template<typename _Duration> |
| 1193 | using sys_time = time_point<system_clock, _Duration>; |
| 1194 | using sys_seconds = sys_time<seconds>; |
| 1195 | using sys_days = sys_time<days>; |
| 1196 | |
| 1197 | using file_clock = ::std::filesystem::__file_clock; |
| 1198 | |
| 1199 | template<typename _Duration> |
| 1200 | using file_time = time_point<file_clock, _Duration>; |
| 1201 | |
| 1202 | template<> struct is_clock<system_clock> : true_type { }; |
| 1203 | template<> struct is_clock<steady_clock> : true_type { }; |
| 1204 | template<> struct is_clock<file_clock> : true_type { }; |
| 1205 | |
| 1206 | template<> inline constexpr bool is_clock_v<system_clock> = true; |
| 1207 | template<> inline constexpr bool is_clock_v<steady_clock> = true; |
| 1208 | template<> inline constexpr bool is_clock_v<file_clock> = true; |
| 1209 | |
| 1210 | struct local_t { }; |
| 1211 | template<typename _Duration> |
| 1212 | using local_time = time_point<local_t, _Duration>; |
| 1213 | using local_seconds = local_time<seconds>; |
| 1214 | using local_days = local_time<days>; |
| 1215 | |
| 1216 | class utc_clock; |
| 1217 | class tai_clock; |
| 1218 | class gps_clock; |
| 1219 | |
| 1220 | template<typename _Duration> |
| 1221 | using utc_time = time_point<utc_clock, _Duration>; |
| 1222 | using utc_seconds = utc_time<seconds>; |
| 1223 | |
| 1224 | template<typename _Duration> |
| 1225 | using tai_time = time_point<tai_clock, _Duration>; |
| 1226 | using tai_seconds = tai_time<seconds>; |
| 1227 | |
| 1228 | template<typename _Duration> |
| 1229 | using gps_time = time_point<gps_clock, _Duration>; |
| 1230 | using gps_seconds = gps_time<seconds>; |
| 1231 | |
| 1232 | template<> struct is_clock<utc_clock> : true_type { }; |
| 1233 | template<> struct is_clock<tai_clock> : true_type { }; |
| 1234 | template<> struct is_clock<gps_clock> : true_type { }; |
| 1235 | |
| 1236 | template<> inline constexpr bool is_clock_v<utc_clock> = true; |
| 1237 | template<> inline constexpr bool is_clock_v<tai_clock> = true; |
| 1238 | template<> inline constexpr bool is_clock_v<gps_clock> = true; |
| 1239 | |
| 1240 | struct leap_second_info |
| 1241 | { |
| 1242 | bool is_leap_second; |
| 1243 | seconds elapsed; |
| 1244 | }; |
| 1245 | |
| 1246 | // CALENDRICAL TYPES |
| 1247 | |
| 1248 | // CLASS DECLARATIONS |
| 1249 | class day; |
| 1250 | class month; |
| 1251 | class year; |
| 1252 | class weekday; |
| 1253 | class weekday_indexed; |
| 1254 | class weekday_last; |
| 1255 | class month_day; |
| 1256 | class month_day_last; |
| 1257 | class month_weekday; |
| 1258 | class month_weekday_last; |
| 1259 | class year_month; |
| 1260 | class year_month_day; |
| 1261 | class year_month_day_last; |
| 1262 | class year_month_weekday; |
| 1263 | class year_month_weekday_last; |
| 1264 | |
| 1265 | struct last_spec |
| 1266 | { |
| 1267 | explicit last_spec() = default; |
| 1268 | |
| 1269 | friend constexpr month_day_last |
| 1270 | operator/(int __m, last_spec) noexcept; |
| 1271 | |
| 1272 | friend constexpr month_day_last |
| 1273 | operator/(last_spec, int __m) noexcept; |
| 1274 | }; |
| 1275 | |
| 1276 | inline constexpr last_spec last{}; |
| 1277 | |
| 1278 | namespace __detail |
| 1279 | { |
| 1280 | // Compute the remainder of the Euclidean division of __n divided by __d. |
| 1281 | // Euclidean division truncates toward negative infinity and always |
| 1282 | // produces a remainder in the range of [0,__d-1] (whereas standard |
| 1283 | // division truncates toward zero and yields a nonpositive remainder |
| 1284 | // for negative __n). |
| 1285 | constexpr unsigned |
| 1286 | __modulo(long long __n, unsigned __d) |
| 1287 | { |
| 1288 | if (__n >= 0) |
| 1289 | return __n % __d; |
| 1290 | else |
| 1291 | return (__d + (__n % __d)) % __d; |
| 1292 | } |
| 1293 | |
| 1294 | inline constexpr unsigned __days_per_month[12] |
| 1295 | = { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; |
| 1296 | } |
| 1297 | |
| 1298 | // DAY |
| 1299 | |
| 1300 | class day |
| 1301 | { |
| 1302 | private: |
| 1303 | unsigned char _M_d; |
| 1304 | |
| 1305 | public: |
| 1306 | day() = default; |
| 1307 | |
| 1308 | explicit constexpr |
| 1309 | day(unsigned __d) noexcept |
| 1310 | : _M_d(__d) |
| 1311 | { } |
| 1312 | |
| 1313 | constexpr day& |
| 1314 | operator++() noexcept |
| 1315 | { |
| 1316 | ++_M_d; |
| 1317 | return *this; |
| 1318 | } |
| 1319 | |
| 1320 | constexpr day |
| 1321 | operator++(int) noexcept |
| 1322 | { |
| 1323 | auto __ret = *this; |
| 1324 | ++(*this); |
| 1325 | return __ret; |
| 1326 | } |
| 1327 | |
| 1328 | constexpr day& |
| 1329 | operator--() noexcept |
| 1330 | { |
| 1331 | --_M_d; |
| 1332 | return *this; |
| 1333 | } |
| 1334 | |
| 1335 | constexpr day |
| 1336 | operator--(int) noexcept |
| 1337 | { |
| 1338 | auto __ret = *this; |
| 1339 | --(*this); |
| 1340 | return __ret; |
| 1341 | } |
| 1342 | |
| 1343 | constexpr day& |
| 1344 | operator+=(const days& __d) noexcept |
| 1345 | { |
| 1346 | *this = *this + __d; |
| 1347 | return *this; |
| 1348 | } |
| 1349 | |
| 1350 | constexpr day& |
| 1351 | operator-=(const days& __d) noexcept |
| 1352 | { |
| 1353 | *this = *this - __d; |
| 1354 | return *this; |
| 1355 | } |
| 1356 | |
| 1357 | constexpr explicit |
| 1358 | operator unsigned() const noexcept |
| 1359 | { return _M_d; } |
| 1360 | |
| 1361 | constexpr bool |
| 1362 | ok() const noexcept |
| 1363 | { return 1 <= _M_d && _M_d <= 31; } |
| 1364 | |
| 1365 | friend constexpr bool |
| 1366 | operator==(const day& __x, const day& __y) noexcept |
| 1367 | { return unsigned{__x} == unsigned{__y}; } |
| 1368 | |
| 1369 | friend constexpr strong_ordering |
| 1370 | operator<=>(const day& __x, const day& __y) noexcept |
| 1371 | { return unsigned{__x} <=> unsigned{__y}; } |
| 1372 | |
| 1373 | friend constexpr day |
| 1374 | operator+(const day& __x, const days& __y) noexcept |
| 1375 | { return day(unsigned{__x} + __y.count()); } |
| 1376 | |
| 1377 | friend constexpr day |
| 1378 | operator+(const days& __x, const day& __y) noexcept |
| 1379 | { return __y + __x; } |
| 1380 | |
| 1381 | friend constexpr day |
| 1382 | operator-(const day& __x, const days& __y) noexcept |
| 1383 | { return __x + -__y; } |
| 1384 | |
| 1385 | friend constexpr days |
| 1386 | operator-(const day& __x, const day& __y) noexcept |
| 1387 | { return days{int(unsigned{__x}) - int(unsigned{__y})}; } |
| 1388 | |
| 1389 | friend constexpr month_day |
| 1390 | operator/(const month& __m, const day& __d) noexcept; |
| 1391 | |
| 1392 | friend constexpr month_day |
| 1393 | operator/(int __m, const day& __d) noexcept; |
| 1394 | |
| 1395 | friend constexpr month_day |
| 1396 | operator/(const day& __d, const month& __m) noexcept; |
| 1397 | |
| 1398 | friend constexpr month_day |
| 1399 | operator/(const day& __d, int __m) noexcept; |
| 1400 | |
| 1401 | friend constexpr year_month_day |
| 1402 | operator/(const year_month& __ym, const day& __d) noexcept; |
| 1403 | |
| 1404 | // TODO: Implement operator<<, to_stream, from_stream. |
| 1405 | }; |
| 1406 | |
| 1407 | // MONTH |
| 1408 | |
| 1409 | class month |
| 1410 | { |
| 1411 | private: |
| 1412 | unsigned char _M_m; |
| 1413 | |
| 1414 | public: |
| 1415 | month() = default; |
| 1416 | |
| 1417 | explicit constexpr |
| 1418 | month(unsigned __m) noexcept |
| 1419 | : _M_m(__m) |
| 1420 | { } |
| 1421 | |
| 1422 | constexpr month& |
| 1423 | operator++() noexcept |
| 1424 | { |
| 1425 | *this += months{1}; |
| 1426 | return *this; |
| 1427 | } |
| 1428 | |
| 1429 | constexpr month |
| 1430 | operator++(int) noexcept |
| 1431 | { |
| 1432 | auto __ret = *this; |
| 1433 | ++(*this); |
| 1434 | return __ret; |
| 1435 | } |
| 1436 | |
| 1437 | constexpr month& |
| 1438 | operator--() noexcept |
| 1439 | { |
| 1440 | *this -= months{1}; |
| 1441 | return *this; |
| 1442 | } |
| 1443 | |
| 1444 | constexpr month |
| 1445 | operator--(int) noexcept |
| 1446 | { |
| 1447 | auto __ret = *this; |
| 1448 | --(*this); |
| 1449 | return __ret; |
| 1450 | } |
| 1451 | |
| 1452 | constexpr month& |
| 1453 | operator+=(const months& __m) noexcept |
| 1454 | { |
| 1455 | *this = *this + __m; |
| 1456 | return *this; |
| 1457 | } |
| 1458 | |
| 1459 | constexpr month& |
| 1460 | operator-=(const months& __m) noexcept |
| 1461 | { |
| 1462 | *this = *this - __m; |
| 1463 | return *this; |
| 1464 | } |
| 1465 | |
| 1466 | explicit constexpr |
| 1467 | operator unsigned() const noexcept |
| 1468 | { return _M_m; } |
| 1469 | |
| 1470 | constexpr bool |
| 1471 | ok() const noexcept |
| 1472 | { return 1 <= _M_m && _M_m <= 12; } |
| 1473 | |
| 1474 | friend constexpr bool |
| 1475 | operator==(const month& __x, const month& __y) noexcept |
| 1476 | { return unsigned{__x} == unsigned{__y}; } |
| 1477 | |
| 1478 | friend constexpr strong_ordering |
| 1479 | operator<=>(const month& __x, const month& __y) noexcept |
| 1480 | { return unsigned{__x} <=> unsigned{__y}; } |
| 1481 | |
| 1482 | friend constexpr month |
| 1483 | operator+(const month& __x, const months& __y) noexcept |
| 1484 | { |
| 1485 | auto __n = static_cast<long long>(unsigned{__x}) + (__y.count() - 1); |
| 1486 | return month{__detail::__modulo(__n, 12) + 1}; |
| 1487 | } |
| 1488 | |
| 1489 | friend constexpr month |
| 1490 | operator+(const months& __x, const month& __y) noexcept |
| 1491 | { return __y + __x; } |
| 1492 | |
| 1493 | friend constexpr month |
| 1494 | operator-(const month& __x, const months& __y) noexcept |
| 1495 | { return __x + -__y; } |
| 1496 | |
| 1497 | friend constexpr months |
| 1498 | operator-(const month& __x, const month& __y) noexcept |
| 1499 | { |
| 1500 | const auto __dm = int(unsigned(__x)) - int(unsigned(__y)); |
| 1501 | return months{__dm < 0 ? 12 + __dm : __dm}; |
| 1502 | } |
| 1503 | |
| 1504 | friend constexpr year_month |
| 1505 | operator/(const year& __y, const month& __m) noexcept; |
| 1506 | |
| 1507 | friend constexpr month_day |
| 1508 | operator/(const month& __m, int __d) noexcept; |
| 1509 | |
| 1510 | friend constexpr month_day_last |
| 1511 | operator/(const month& __m, last_spec) noexcept; |
| 1512 | |
| 1513 | friend constexpr month_day_last |
| 1514 | operator/(last_spec, const month& __m) noexcept; |
| 1515 | |
| 1516 | friend constexpr month_weekday |
| 1517 | operator/(const month& __m, const weekday_indexed& __wdi) noexcept; |
| 1518 | |
| 1519 | friend constexpr month_weekday |
| 1520 | operator/(const weekday_indexed& __wdi, const month& __m) noexcept; |
| 1521 | |
| 1522 | friend constexpr month_weekday_last |
| 1523 | operator/(const month& __m, const weekday_last& __wdl) noexcept; |
| 1524 | |
| 1525 | friend constexpr month_weekday_last |
| 1526 | operator/(const weekday_last& __wdl, const month& __m) noexcept; |
| 1527 | |
| 1528 | // TODO: Implement operator<<, to_stream, from_stream. |
| 1529 | }; |
| 1530 | |
| 1531 | inline constexpr month January{1}; |
| 1532 | inline constexpr month February{2}; |
| 1533 | inline constexpr month March{3}; |
| 1534 | inline constexpr month April{4}; |
| 1535 | inline constexpr month May{5}; |
| 1536 | inline constexpr month June{6}; |
| 1537 | inline constexpr month July{7}; |
| 1538 | inline constexpr month August{8}; |
| 1539 | inline constexpr month September{9}; |
| 1540 | inline constexpr month October{10}; |
| 1541 | inline constexpr month November{11}; |
| 1542 | inline constexpr month December{12}; |
| 1543 | |
| 1544 | // YEAR |
| 1545 | |
| 1546 | class year |
| 1547 | { |
| 1548 | private: |
| 1549 | short _M_y; |
| 1550 | |
| 1551 | public: |
| 1552 | year() = default; |
| 1553 | |
| 1554 | explicit constexpr |
| 1555 | year(int __y) noexcept |
| 1556 | : _M_y{static_cast<short>(__y)} |
| 1557 | { } |
| 1558 | |
| 1559 | static constexpr year |
| 1560 | min() noexcept |
| 1561 | { return year{-32767}; } |
| 1562 | |
| 1563 | static constexpr year |
| 1564 | max() noexcept |
| 1565 | { return year{32767}; } |
| 1566 | |
| 1567 | constexpr year& |
| 1568 | operator++() noexcept |
| 1569 | { |
| 1570 | ++_M_y; |
| 1571 | return *this; |
| 1572 | } |
| 1573 | |
| 1574 | constexpr year |
| 1575 | operator++(int) noexcept |
| 1576 | { |
| 1577 | auto __ret = *this; |
| 1578 | ++(*this); |
| 1579 | return __ret; |
| 1580 | } |
| 1581 | |
| 1582 | constexpr year& |
| 1583 | operator--() noexcept |
| 1584 | { |
| 1585 | --_M_y; |
| 1586 | return *this; |
| 1587 | } |
| 1588 | |
| 1589 | constexpr year |
| 1590 | operator--(int) noexcept |
| 1591 | { |
| 1592 | auto __ret = *this; |
| 1593 | --(*this); |
| 1594 | return __ret; |
| 1595 | } |
| 1596 | |
| 1597 | constexpr year& |
| 1598 | operator+=(const years& __y) noexcept |
| 1599 | { |
| 1600 | *this = *this + __y; |
| 1601 | return *this; |
| 1602 | } |
| 1603 | |
| 1604 | constexpr year& |
| 1605 | operator-=(const years& __y) noexcept |
| 1606 | { |
| 1607 | *this = *this - __y; |
| 1608 | return *this; |
| 1609 | } |
| 1610 | |
| 1611 | constexpr year |
| 1612 | operator+() const noexcept |
| 1613 | { return *this; } |
| 1614 | |
| 1615 | constexpr year |
| 1616 | operator-() const noexcept |
| 1617 | { return year{-_M_y}; } |
| 1618 | |
| 1619 | constexpr bool |
| 1620 | is_leap() const noexcept |
| 1621 | { |
| 1622 | // Testing divisibility by 100 first gives better performance, that is, |
| 1623 | // return (_M_y % 100 != 0 || _M_y % 400 == 0) && _M_y % 4 == 0; |
| 1624 | |
| 1625 | // It gets even faster if _M_y is in [-536870800, 536870999] |
| 1626 | // (which is the case here) and _M_y % 100 is replaced by |
| 1627 | // __is_multiple_of_100 below. |
| 1628 | |
| 1629 | // References: |
| 1630 | // [1] https://github.com/cassioneri/calendar |
| 1631 | // [2] https://accu.org/journals/overload/28/155/overload155.pdf#page=16 |
| 1632 | |
| 1633 | constexpr uint32_t __multiplier = 42949673; |
| 1634 | constexpr uint32_t __bound = 42949669; |
| 1635 | constexpr uint32_t __max_dividend = 1073741799; |
| 1636 | constexpr uint32_t __offset = __max_dividend / 2 / 100 * 100; |
| 1637 | const bool __is_multiple_of_100 |
| 1638 | = __multiplier * (_M_y + __offset) < __bound; |
| 1639 | return (!__is_multiple_of_100 || _M_y % 400 == 0) && _M_y % 4 == 0; |
| 1640 | } |
| 1641 | |
| 1642 | explicit constexpr |
| 1643 | operator int() const noexcept |
| 1644 | { return _M_y; } |
| 1645 | |
| 1646 | constexpr bool |
| 1647 | ok() const noexcept |
| 1648 | { return min()._M_y <= _M_y && _M_y <= max()._M_y; } |
| 1649 | |
| 1650 | friend constexpr bool |
| 1651 | operator==(const year& __x, const year& __y) noexcept |
| 1652 | { return int{__x} == int{__y}; } |
| 1653 | |
| 1654 | friend constexpr strong_ordering |
| 1655 | operator<=>(const year& __x, const year& __y) noexcept |
| 1656 | { return int{__x} <=> int{__y}; } |
| 1657 | |
| 1658 | friend constexpr year |
| 1659 | operator+(const year& __x, const years& __y) noexcept |
| 1660 | { return year{int{__x} + static_cast<int>(__y.count())}; } |
| 1661 | |
| 1662 | friend constexpr year |
| 1663 | operator+(const years& __x, const year& __y) noexcept |
| 1664 | { return __y + __x; } |
| 1665 | |
| 1666 | friend constexpr year |
| 1667 | operator-(const year& __x, const years& __y) noexcept |
| 1668 | { return __x + -__y; } |
| 1669 | |
| 1670 | friend constexpr years |
| 1671 | operator-(const year& __x, const year& __y) noexcept |
| 1672 | { return years{int{__x} - int{__y}}; } |
| 1673 | |
| 1674 | friend constexpr year_month |
| 1675 | operator/(const year& __y, int __m) noexcept; |
| 1676 | |
| 1677 | friend constexpr year_month_day |
| 1678 | operator/(const year& __y, const month_day& __md) noexcept; |
| 1679 | |
| 1680 | friend constexpr year_month_day |
| 1681 | operator/(const month_day& __md, const year& __y) noexcept; |
| 1682 | |
| 1683 | friend constexpr year_month_day_last |
| 1684 | operator/(const year& __y, const month_day_last& __mdl) noexcept; |
| 1685 | |
| 1686 | friend constexpr year_month_day_last |
| 1687 | operator/(const month_day_last& __mdl, const year& __y) noexcept; |
| 1688 | |
| 1689 | friend constexpr year_month_weekday |
| 1690 | operator/(const year& __y, const month_weekday& __mwd) noexcept; |
| 1691 | |
| 1692 | friend constexpr year_month_weekday |
| 1693 | operator/(const month_weekday& __mwd, const year& __y) noexcept; |
| 1694 | |
| 1695 | friend constexpr year_month_weekday_last |
| 1696 | operator/(const year& __y, const month_weekday_last& __mwdl) noexcept; |
| 1697 | |
| 1698 | friend constexpr year_month_weekday_last |
| 1699 | operator/(const month_weekday_last& __mwdl, const year& __y) noexcept; |
| 1700 | |
| 1701 | // TODO: Implement operator<<, to_stream, from_stream. |
| 1702 | }; |
| 1703 | |
| 1704 | // WEEKDAY |
| 1705 | |
| 1706 | class weekday |
| 1707 | { |
| 1708 | private: |
| 1709 | unsigned char _M_wd; |
| 1710 | |
| 1711 | static constexpr weekday |
| 1712 | _S_from_days(const days& __d) |
| 1713 | { |
| 1714 | auto __n = __d.count(); |
| 1715 | return weekday(__n >= -4 ? (__n + 4) % 7 : (__n + 5) % 7 + 6); |
| 1716 | } |
| 1717 | |
| 1718 | public: |
| 1719 | weekday() = default; |
| 1720 | |
| 1721 | explicit constexpr |
| 1722 | weekday(unsigned __wd) noexcept |
| 1723 | : _M_wd(__wd == 7 ? 0 : __wd) // __wd % 7 ? |
| 1724 | { } |
| 1725 | |
| 1726 | constexpr |
| 1727 | weekday(const sys_days& __dp) noexcept |
| 1728 | : weekday{_S_from_days(__dp.time_since_epoch())} |
| 1729 | { } |
| 1730 | |
| 1731 | explicit constexpr |
| 1732 | weekday(const local_days& __dp) noexcept |
| 1733 | : weekday{sys_days{__dp.time_since_epoch()}} |
| 1734 | { } |
| 1735 | |
| 1736 | constexpr weekday& |
| 1737 | operator++() noexcept |
| 1738 | { |
| 1739 | *this += days{1}; |
| 1740 | return *this; |
| 1741 | } |
| 1742 | |
| 1743 | constexpr weekday |
| 1744 | operator++(int) noexcept |
| 1745 | { |
| 1746 | auto __ret = *this; |
| 1747 | ++(*this); |
| 1748 | return __ret; |
| 1749 | } |
| 1750 | |
| 1751 | constexpr weekday& |
| 1752 | operator--() noexcept |
| 1753 | { |
| 1754 | *this -= days{1}; |
| 1755 | return *this; |
| 1756 | } |
| 1757 | |
| 1758 | constexpr weekday |
| 1759 | operator--(int) noexcept |
| 1760 | { |
| 1761 | auto __ret = *this; |
| 1762 | --(*this); |
| 1763 | return __ret; |
| 1764 | } |
| 1765 | |
| 1766 | constexpr weekday& |
| 1767 | operator+=(const days& __d) noexcept |
| 1768 | { |
| 1769 | *this = *this + __d; |
| 1770 | return *this; |
| 1771 | } |
| 1772 | |
| 1773 | constexpr weekday& |
| 1774 | operator-=(const days& __d) noexcept |
| 1775 | { |
| 1776 | *this = *this - __d; |
| 1777 | return *this; |
| 1778 | } |
| 1779 | |
| 1780 | constexpr unsigned |
| 1781 | c_encoding() const noexcept |
| 1782 | { return _M_wd; } |
| 1783 | |
| 1784 | constexpr unsigned |
| 1785 | iso_encoding() const noexcept |
| 1786 | { return _M_wd == 0u ? 7u : _M_wd; } |
| 1787 | |
| 1788 | constexpr bool |
| 1789 | ok() const noexcept |
| 1790 | { return _M_wd <= 6; } |
| 1791 | |
| 1792 | constexpr weekday_indexed |
| 1793 | operator[](unsigned __index) const noexcept; |
| 1794 | |
| 1795 | constexpr weekday_last |
| 1796 | operator[](last_spec) const noexcept; |
| 1797 | |
| 1798 | friend constexpr bool |
| 1799 | operator==(const weekday& __x, const weekday& __y) noexcept |
| 1800 | { return __x._M_wd == __y._M_wd; } |
| 1801 | |
| 1802 | friend constexpr weekday |
| 1803 | operator+(const weekday& __x, const days& __y) noexcept |
| 1804 | { |
| 1805 | auto __n = static_cast<long long>(__x._M_wd) + __y.count(); |
| 1806 | return weekday{__detail::__modulo(__n, 7)}; |
| 1807 | } |
| 1808 | |
| 1809 | friend constexpr weekday |
| 1810 | operator+(const days& __x, const weekday& __y) noexcept |
| 1811 | { return __y + __x; } |
| 1812 | |
| 1813 | friend constexpr weekday |
| 1814 | operator-(const weekday& __x, const days& __y) noexcept |
| 1815 | { return __x + -__y; } |
| 1816 | |
| 1817 | friend constexpr days |
| 1818 | operator-(const weekday& __x, const weekday& __y) noexcept |
| 1819 | { |
| 1820 | auto __n = static_cast<long long>(__x._M_wd) - __y._M_wd; |
| 1821 | return days{__detail::__modulo(__n, 7)}; |
| 1822 | } |
| 1823 | |
| 1824 | // TODO: operator<<, from_stream. |
| 1825 | }; |
| 1826 | |
| 1827 | inline constexpr weekday Sunday{0}; |
| 1828 | inline constexpr weekday Monday{1}; |
| 1829 | inline constexpr weekday Tuesday{2}; |
| 1830 | inline constexpr weekday Wednesday{3}; |
| 1831 | inline constexpr weekday Thursday{4}; |
| 1832 | inline constexpr weekday Friday{5}; |
| 1833 | inline constexpr weekday Saturday{6}; |
| 1834 | |
| 1835 | // WEEKDAY_INDEXED |
| 1836 | |
| 1837 | class weekday_indexed |
| 1838 | { |
| 1839 | private: |
| 1840 | chrono::weekday _M_wd; |
| 1841 | unsigned char _M_index; |
| 1842 | |
| 1843 | public: |
| 1844 | weekday_indexed() = default; |
| 1845 | |
| 1846 | constexpr |
| 1847 | weekday_indexed(const chrono::weekday& __wd, unsigned __index) noexcept |
| 1848 | : _M_wd(__wd), _M_index(__index) |
| 1849 | { } |
| 1850 | |
| 1851 | constexpr chrono::weekday |
| 1852 | weekday() const noexcept |
| 1853 | { return _M_wd; } |
| 1854 | |
| 1855 | constexpr unsigned |
| 1856 | index() const noexcept |
| 1857 | { return _M_index; }; |
| 1858 | |
| 1859 | constexpr bool |
| 1860 | ok() const noexcept |
| 1861 | { return _M_wd.ok() && 1 <= _M_index && _M_index <= 5; } |
| 1862 | |
| 1863 | friend constexpr bool |
| 1864 | operator==(const weekday_indexed& __x, const weekday_indexed& __y) noexcept |
| 1865 | { return __x.weekday() == __y.weekday() && __x.index() == __y.index(); } |
| 1866 | |
| 1867 | friend constexpr month_weekday |
| 1868 | operator/(const month& __m, const weekday_indexed& __wdi) noexcept; |
| 1869 | |
| 1870 | friend constexpr month_weekday |
| 1871 | operator/(int __m, const weekday_indexed& __wdi) noexcept; |
| 1872 | |
| 1873 | friend constexpr month_weekday |
| 1874 | operator/(const weekday_indexed& __wdi, const month& __m) noexcept; |
| 1875 | |
| 1876 | friend constexpr month_weekday |
| 1877 | operator/(const weekday_indexed& __wdi, int __m) noexcept; |
| 1878 | |
| 1879 | friend constexpr year_month_weekday |
| 1880 | operator/(const year_month& __ym, const weekday_indexed& __wdi) noexcept; |
| 1881 | |
| 1882 | // TODO: Implement operator<<. |
| 1883 | }; |
| 1884 | |
| 1885 | constexpr weekday_indexed |
| 1886 | weekday::operator[](unsigned __index) const noexcept |
| 1887 | { return {*this, __index}; } |
| 1888 | |
| 1889 | // WEEKDAY_LAST |
| 1890 | |
| 1891 | class weekday_last |
| 1892 | { |
| 1893 | private: |
| 1894 | chrono::weekday _M_wd; |
| 1895 | |
| 1896 | public: |
| 1897 | explicit constexpr |
| 1898 | weekday_last(const chrono::weekday& __wd) noexcept |
| 1899 | : _M_wd{__wd} |
| 1900 | { } |
| 1901 | |
| 1902 | constexpr chrono::weekday |
| 1903 | weekday() const noexcept |
| 1904 | { return _M_wd; } |
| 1905 | |
| 1906 | constexpr bool |
| 1907 | ok() const noexcept |
| 1908 | { return _M_wd.ok(); } |
| 1909 | |
| 1910 | friend constexpr bool |
| 1911 | operator==(const weekday_last& __x, const weekday_last& __y) noexcept |
| 1912 | { return __x.weekday() == __y.weekday(); } |
| 1913 | |
| 1914 | friend constexpr month_weekday_last |
| 1915 | operator/(int __m, const weekday_last& __wdl) noexcept; |
| 1916 | |
| 1917 | friend constexpr month_weekday_last |
| 1918 | operator/(const weekday_last& __wdl, int __m) noexcept; |
| 1919 | |
| 1920 | friend constexpr year_month_weekday_last |
| 1921 | operator/(const year_month& __ym, const weekday_last& __wdl) noexcept; |
| 1922 | |
| 1923 | // TODO: Implement operator<<. |
| 1924 | }; |
| 1925 | |
| 1926 | constexpr weekday_last |
| 1927 | weekday::operator[](last_spec) const noexcept |
| 1928 | { return weekday_last{*this}; } |
| 1929 | |
| 1930 | // MONTH_DAY |
| 1931 | |
| 1932 | class month_day |
| 1933 | { |
| 1934 | private: |
| 1935 | chrono::month _M_m; |
| 1936 | chrono::day _M_d; |
| 1937 | |
| 1938 | public: |
| 1939 | month_day() = default; |
| 1940 | |
| 1941 | constexpr |
| 1942 | month_day(const chrono::month& __m, const chrono::day& __d) noexcept |
| 1943 | : _M_m{__m}, _M_d{__d} |
| 1944 | { } |
| 1945 | |
| 1946 | constexpr chrono::month |
| 1947 | month() const noexcept |
| 1948 | { return _M_m; } |
| 1949 | |
| 1950 | constexpr chrono::day |
| 1951 | day() const noexcept |
| 1952 | { return _M_d; } |
| 1953 | |
| 1954 | constexpr bool |
| 1955 | ok() const noexcept |
| 1956 | { |
| 1957 | return _M_m.ok() |
| 1958 | && 1u <= unsigned(_M_d) |
| 1959 | && unsigned(_M_d) <= __detail::__days_per_month[unsigned(_M_m) - 1]; |
| 1960 | } |
| 1961 | |
| 1962 | friend constexpr bool |
| 1963 | operator==(const month_day& __x, const month_day& __y) noexcept |
| 1964 | { return __x.month() == __y.month() && __x.day() == __y.day(); } |
| 1965 | |
| 1966 | friend constexpr strong_ordering |
| 1967 | operator<=>(const month_day& __x, const month_day& __y) noexcept |
| 1968 | = default; |
| 1969 | |
| 1970 | friend constexpr month_day |
| 1971 | operator/(const chrono::month& __m, const chrono::day& __d) noexcept |
| 1972 | { return {__m, __d}; } |
| 1973 | |
| 1974 | friend constexpr month_day |
| 1975 | operator/(const chrono::month& __m, int __d) noexcept |
| 1976 | { return {__m, chrono::day(unsigned(__d))}; } |
| 1977 | |
| 1978 | friend constexpr month_day |
| 1979 | operator/(int __m, const chrono::day& __d) noexcept |
| 1980 | { return {chrono::month(unsigned(__m)), __d}; } |
| 1981 | |
| 1982 | friend constexpr month_day |
| 1983 | operator/(const chrono::day& __d, const chrono::month& __m) noexcept |
| 1984 | { return {__m, __d}; } |
| 1985 | |
| 1986 | friend constexpr month_day |
| 1987 | operator/(const chrono::day& __d, int __m) noexcept |
| 1988 | { return {chrono::month(unsigned(__m)), __d}; } |
| 1989 | |
| 1990 | friend constexpr year_month_day |
| 1991 | operator/(int __y, const month_day& __md) noexcept; |
| 1992 | |
| 1993 | friend constexpr year_month_day |
| 1994 | operator/(const month_day& __md, int __y) noexcept; |
| 1995 | |
| 1996 | // TODO: Implement operator<<, from_stream. |
| 1997 | }; |
| 1998 | |
| 1999 | // MONTH_DAY_LAST |
| 2000 | |
| 2001 | class month_day_last |
| 2002 | { |
| 2003 | private: |
| 2004 | chrono::month _M_m; |
| 2005 | |
| 2006 | public: |
| 2007 | explicit constexpr |
| 2008 | month_day_last(const chrono::month& __m) noexcept |
| 2009 | : _M_m{__m} |
| 2010 | { } |
| 2011 | |
| 2012 | constexpr chrono::month |
| 2013 | month() const noexcept |
| 2014 | { return _M_m; } |
| 2015 | |
| 2016 | constexpr bool |
| 2017 | ok() const noexcept |
| 2018 | { return _M_m.ok(); } |
| 2019 | |
| 2020 | friend constexpr bool |
| 2021 | operator==(const month_day_last& __x, const month_day_last& __y) noexcept |
| 2022 | { return __x.month() == __y.month(); } |
| 2023 | |
| 2024 | friend constexpr strong_ordering |
| 2025 | operator<=>(const month_day_last& __x, const month_day_last& __y) noexcept |
| 2026 | = default; |
| 2027 | |
| 2028 | friend constexpr month_day_last |
| 2029 | operator/(const chrono::month& __m, last_spec) noexcept |
| 2030 | { return month_day_last{__m}; } |
| 2031 | |
| 2032 | friend constexpr month_day_last |
| 2033 | operator/(int __m, last_spec) noexcept |
| 2034 | { return chrono::month(unsigned(__m)) / last; } |
| 2035 | |
| 2036 | friend constexpr month_day_last |
| 2037 | operator/(last_spec, const chrono::month& __m) noexcept |
| 2038 | { return __m / last; } |
| 2039 | |
| 2040 | friend constexpr month_day_last |
| 2041 | operator/(last_spec, int __m) noexcept |
| 2042 | { return __m / last; } |
| 2043 | |
| 2044 | friend constexpr year_month_day_last |
| 2045 | operator/(int __y, const month_day_last& __mdl) noexcept; |
| 2046 | |
| 2047 | friend constexpr year_month_day_last |
| 2048 | operator/(const month_day_last& __mdl, int __y) noexcept; |
| 2049 | |
| 2050 | // TODO: Implement operator<<. |
| 2051 | }; |
| 2052 | |
| 2053 | // MONTH_WEEKDAY |
| 2054 | |
| 2055 | class month_weekday |
| 2056 | { |
| 2057 | private: |
| 2058 | chrono::month _M_m; |
| 2059 | chrono::weekday_indexed _M_wdi; |
| 2060 | |
| 2061 | public: |
| 2062 | constexpr |
| 2063 | month_weekday(const chrono::month& __m, |
| 2064 | const chrono::weekday_indexed& __wdi) noexcept |
| 2065 | : _M_m{__m}, _M_wdi{__wdi} |
| 2066 | { } |
| 2067 | |
| 2068 | constexpr chrono::month |
| 2069 | month() const noexcept |
| 2070 | { return _M_m; } |
| 2071 | |
| 2072 | constexpr chrono::weekday_indexed |
| 2073 | weekday_indexed() const noexcept |
| 2074 | { return _M_wdi; } |
| 2075 | |
| 2076 | constexpr bool |
| 2077 | ok() const noexcept |
| 2078 | { return _M_m.ok() && _M_wdi.ok(); } |
| 2079 | |
| 2080 | friend constexpr bool |
| 2081 | operator==(const month_weekday& __x, const month_weekday& __y) noexcept |
| 2082 | { |
| 2083 | return __x.month() == __y.month() |
| 2084 | && __x.weekday_indexed() == __y.weekday_indexed(); |
| 2085 | } |
| 2086 | |
| 2087 | friend constexpr month_weekday |
| 2088 | operator/(const chrono::month& __m, |
| 2089 | const chrono::weekday_indexed& __wdi) noexcept |
| 2090 | { return {__m, __wdi}; } |
| 2091 | |
| 2092 | friend constexpr month_weekday |
| 2093 | operator/(int __m, const chrono::weekday_indexed& __wdi) noexcept |
| 2094 | { return chrono::month(unsigned(__m)) / __wdi; } |
| 2095 | |
| 2096 | friend constexpr month_weekday |
| 2097 | operator/(const chrono::weekday_indexed& __wdi, |
| 2098 | const chrono::month& __m) noexcept |
| 2099 | { return __m / __wdi; } |
| 2100 | |
| 2101 | friend constexpr month_weekday |
| 2102 | operator/(const chrono::weekday_indexed& __wdi, int __m) noexcept |
| 2103 | { return __m / __wdi; } |
| 2104 | |
| 2105 | friend constexpr year_month_weekday |
| 2106 | operator/(int __y, const month_weekday& __mwd) noexcept; |
| 2107 | |
| 2108 | friend constexpr year_month_weekday |
| 2109 | operator/(const month_weekday& __mwd, int __y) noexcept; |
| 2110 | |
| 2111 | // TODO: Implement operator<<. |
| 2112 | }; |
| 2113 | |
| 2114 | // MONTH_WEEKDAY_LAST |
| 2115 | |
| 2116 | class month_weekday_last |
| 2117 | { |
| 2118 | private: |
| 2119 | chrono::month _M_m; |
| 2120 | chrono::weekday_last _M_wdl; |
| 2121 | |
| 2122 | public: |
| 2123 | constexpr |
| 2124 | month_weekday_last(const chrono::month& __m, |
| 2125 | const chrono::weekday_last& __wdl) noexcept |
| 2126 | :_M_m{__m}, _M_wdl{__wdl} |
| 2127 | { } |
| 2128 | |
| 2129 | constexpr chrono::month |
| 2130 | month() const noexcept |
| 2131 | { return _M_m; } |
| 2132 | |
| 2133 | constexpr chrono::weekday_last |
| 2134 | weekday_last() const noexcept |
| 2135 | { return _M_wdl; } |
| 2136 | |
| 2137 | constexpr bool |
| 2138 | ok() const noexcept |
| 2139 | { return _M_m.ok() && _M_wdl.ok(); } |
| 2140 | |
| 2141 | friend constexpr bool |
| 2142 | operator==(const month_weekday_last& __x, |
| 2143 | const month_weekday_last& __y) noexcept |
| 2144 | { |
| 2145 | return __x.month() == __y.month() |
| 2146 | && __x.weekday_last() == __y.weekday_last(); |
| 2147 | } |
| 2148 | |
| 2149 | friend constexpr month_weekday_last |
| 2150 | operator/(const chrono::month& __m, |
| 2151 | const chrono::weekday_last& __wdl) noexcept |
| 2152 | { return {__m, __wdl}; } |
| 2153 | |
| 2154 | friend constexpr month_weekday_last |
| 2155 | operator/(int __m, const chrono::weekday_last& __wdl) noexcept |
| 2156 | { return chrono::month(unsigned(__m)) / __wdl; } |
| 2157 | |
| 2158 | friend constexpr month_weekday_last |
| 2159 | operator/(const chrono::weekday_last& __wdl, |
| 2160 | const chrono::month& __m) noexcept |
| 2161 | { return __m / __wdl; } |
| 2162 | |
| 2163 | friend constexpr month_weekday_last |
| 2164 | operator/(const chrono::weekday_last& __wdl, int __m) noexcept |
| 2165 | { return chrono::month(unsigned(__m)) / __wdl; } |
| 2166 | |
| 2167 | friend constexpr year_month_weekday_last |
| 2168 | operator/(int __y, const month_weekday_last& __mwdl) noexcept; |
| 2169 | |
| 2170 | friend constexpr year_month_weekday_last |
| 2171 | operator/(const month_weekday_last& __mwdl, int __y) noexcept; |
| 2172 | |
| 2173 | // TODO: Implement operator<<. |
| 2174 | }; |
| 2175 | |
| 2176 | // YEAR_MONTH |
| 2177 | |
| 2178 | namespace __detail |
| 2179 | { |
| 2180 | // [time.cal.ym], [time.cal.ymd], etc constrain the 'months'-based |
| 2181 | // addition/subtraction operator overloads like so: |
| 2182 | // |
| 2183 | // Constraints: if the argument supplied by the caller for the months |
| 2184 | // parameter is convertible to years, its implicit conversion sequence |
| 2185 | // to years is worse than its implicit conversion sequence to months. |
| 2186 | // |
| 2187 | // We realize this constraint by templatizing the 'months'-based |
| 2188 | // overloads (using a dummy defaulted template parameter), so that |
| 2189 | // overload resolution doesn't select the 'months'-based overload unless |
| 2190 | // the implicit conversion sequence to 'months' is better than that to |
| 2191 | // 'years'. |
| 2192 | using __months_years_conversion_disambiguator = void; |
| 2193 | } |
| 2194 | |
| 2195 | class year_month |
| 2196 | { |
| 2197 | private: |
| 2198 | chrono::year _M_y; |
| 2199 | chrono::month _M_m; |
| 2200 | |
| 2201 | public: |
| 2202 | year_month() = default; |
| 2203 | |
| 2204 | constexpr |
| 2205 | year_month(const chrono::year& __y, const chrono::month& __m) noexcept |
| 2206 | : _M_y{__y}, _M_m{__m} |
| 2207 | { } |
| 2208 | |
| 2209 | constexpr chrono::year |
| 2210 | year() const noexcept |
| 2211 | { return _M_y; } |
| 2212 | |
| 2213 | constexpr chrono::month |
| 2214 | month() const noexcept |
| 2215 | { return _M_m; } |
| 2216 | |
| 2217 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 2218 | constexpr year_month& |
| 2219 | operator+=(const months& __dm) noexcept |
| 2220 | { |
| 2221 | *this = *this + __dm; |
| 2222 | return *this; |
| 2223 | } |
| 2224 | |
| 2225 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 2226 | constexpr year_month& |
| 2227 | operator-=(const months& __dm) noexcept |
| 2228 | { |
| 2229 | *this = *this - __dm; |
| 2230 | return *this; |
| 2231 | } |
| 2232 | |
| 2233 | constexpr year_month& |
| 2234 | operator+=(const years& __dy) noexcept |
| 2235 | { |
| 2236 | *this = *this + __dy; |
| 2237 | return *this; |
| 2238 | } |
| 2239 | |
| 2240 | constexpr year_month& |
| 2241 | operator-=(const years& __dy) noexcept |
| 2242 | { |
| 2243 | *this = *this - __dy; |
| 2244 | return *this; |
| 2245 | } |
| 2246 | |
| 2247 | constexpr bool |
| 2248 | ok() const noexcept |
| 2249 | { return _M_y.ok() && _M_m.ok(); } |
| 2250 | |
| 2251 | friend constexpr bool |
| 2252 | operator==(const year_month& __x, const year_month& __y) noexcept |
| 2253 | { return __x.year() == __y.year() && __x.month() == __y.month(); } |
| 2254 | |
| 2255 | friend constexpr strong_ordering |
| 2256 | operator<=>(const year_month& __x, const year_month& __y) noexcept |
| 2257 | = default; |
| 2258 | |
| 2259 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 2260 | friend constexpr year_month |
| 2261 | operator+(const year_month& __ym, const months& __dm) noexcept |
| 2262 | { |
| 2263 | // TODO: Optimize? |
| 2264 | auto __m = __ym.month() + __dm; |
| 2265 | auto __i = int(unsigned(__ym.month())) - 1 + __dm.count(); |
| 2266 | auto __y = (__i < 0 |
| 2267 | ? __ym.year() + years{(__i - 11) / 12} |
| 2268 | : __ym.year() + years{__i / 12}); |
| 2269 | return __y / __m; |
| 2270 | } |
| 2271 | |
| 2272 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 2273 | friend constexpr year_month |
| 2274 | operator+(const months& __dm, const year_month& __ym) noexcept |
| 2275 | { return __ym + __dm; } |
| 2276 | |
| 2277 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 2278 | friend constexpr year_month |
| 2279 | operator-(const year_month& __ym, const months& __dm) noexcept |
| 2280 | { return __ym + -__dm; } |
| 2281 | |
| 2282 | friend constexpr months |
| 2283 | operator-(const year_month& __x, const year_month& __y) noexcept |
| 2284 | { |
| 2285 | return (__x.year() - __y.year() |
| 2286 | + months{static_cast<int>(unsigned{__x.month()}) |
| 2287 | - static_cast<int>(unsigned{__y.month()})}); |
| 2288 | } |
| 2289 | |
| 2290 | friend constexpr year_month |
| 2291 | operator+(const year_month& __ym, const years& __dy) noexcept |
| 2292 | { return (__ym.year() + __dy) / __ym.month(); } |
| 2293 | |
| 2294 | friend constexpr year_month |
| 2295 | operator+(const years& __dy, const year_month& __ym) noexcept |
| 2296 | { return __ym + __dy; } |
| 2297 | |
| 2298 | friend constexpr year_month |
| 2299 | operator-(const year_month& __ym, const years& __dy) noexcept |
| 2300 | { return __ym + -__dy; } |
| 2301 | |
| 2302 | friend constexpr year_month |
| 2303 | operator/(const chrono::year& __y, const chrono::month& __m) noexcept |
| 2304 | { return {__y, __m}; } |
| 2305 | |
| 2306 | friend constexpr year_month |
| 2307 | operator/(const chrono::year& __y, int __m) noexcept |
| 2308 | { return {__y, chrono::month(unsigned(__m))}; } |
| 2309 | |
| 2310 | friend constexpr year_month_day |
| 2311 | operator/(const year_month& __ym, int __d) noexcept; |
| 2312 | |
| 2313 | friend constexpr year_month_day_last |
| 2314 | operator/(const year_month& __ym, last_spec) noexcept; |
| 2315 | |
| 2316 | // TODO: Implement operator<<, from_stream. |
| 2317 | }; |
| 2318 | |
| 2319 | // YEAR_MONTH_DAY |
| 2320 | |
| 2321 | class year_month_day |
| 2322 | { |
| 2323 | private: |
| 2324 | chrono::year _M_y; |
| 2325 | chrono::month _M_m; |
| 2326 | chrono::day _M_d; |
| 2327 | |
| 2328 | static constexpr year_month_day _S_from_days(const days& __dp) noexcept; |
| 2329 | |
| 2330 | constexpr days _M_days_since_epoch() const noexcept; |
| 2331 | |
| 2332 | public: |
| 2333 | year_month_day() = default; |
| 2334 | |
| 2335 | constexpr |
| 2336 | year_month_day(const chrono::year& __y, const chrono::month& __m, |
| 2337 | const chrono::day& __d) noexcept |
| 2338 | : _M_y{__y}, _M_m{__m}, _M_d{__d} |
| 2339 | { } |
| 2340 | |
| 2341 | constexpr |
| 2342 | year_month_day(const year_month_day_last& __ymdl) noexcept; |
| 2343 | |
| 2344 | constexpr |
| 2345 | year_month_day(const sys_days& __dp) noexcept |
| 2346 | : year_month_day(_S_from_days(__dp.time_since_epoch())) |
| 2347 | { } |
| 2348 | |
| 2349 | explicit constexpr |
| 2350 | year_month_day(const local_days& __dp) noexcept |
| 2351 | : year_month_day(sys_days{__dp.time_since_epoch()}) |
| 2352 | { } |
| 2353 | |
| 2354 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 2355 | constexpr year_month_day& |
| 2356 | operator+=(const months& __m) noexcept |
| 2357 | { |
| 2358 | *this = *this + __m; |
| 2359 | return *this; |
| 2360 | } |
| 2361 | |
| 2362 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 2363 | constexpr year_month_day& |
| 2364 | operator-=(const months& __m) noexcept |
| 2365 | { |
| 2366 | *this = *this - __m; |
| 2367 | return *this; |
| 2368 | } |
| 2369 | |
| 2370 | constexpr year_month_day& |
| 2371 | operator+=(const years& __y) noexcept |
| 2372 | { |
| 2373 | *this = *this + __y; |
| 2374 | return *this; |
| 2375 | } |
| 2376 | |
| 2377 | constexpr year_month_day& |
| 2378 | operator-=(const years& __y) noexcept |
| 2379 | { |
| 2380 | *this = *this - __y; |
| 2381 | return *this; |
| 2382 | } |
| 2383 | |
| 2384 | constexpr chrono::year |
| 2385 | year() const noexcept |
| 2386 | { return _M_y; } |
| 2387 | |
| 2388 | constexpr chrono::month |
| 2389 | month() const noexcept |
| 2390 | { return _M_m; } |
| 2391 | |
| 2392 | constexpr chrono::day |
| 2393 | day() const noexcept |
| 2394 | { return _M_d; } |
| 2395 | |
| 2396 | constexpr |
| 2397 | operator sys_days() const noexcept |
| 2398 | { return sys_days{_M_days_since_epoch()}; } |
| 2399 | |
| 2400 | explicit constexpr |
| 2401 | operator local_days() const noexcept |
| 2402 | { return local_days{sys_days{*this}.time_since_epoch()}; } |
| 2403 | |
| 2404 | constexpr bool ok() const noexcept; |
| 2405 | |
| 2406 | friend constexpr bool |
| 2407 | operator==(const year_month_day& __x, const year_month_day& __y) noexcept |
| 2408 | { |
| 2409 | return __x.year() == __y.year() |
| 2410 | && __x.month() == __y.month() |
| 2411 | && __x.day() == __y.day(); |
| 2412 | } |
| 2413 | |
| 2414 | friend constexpr strong_ordering |
| 2415 | operator<=>(const year_month_day& __x, const year_month_day& __y) noexcept |
| 2416 | = default; |
| 2417 | |
| 2418 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 2419 | friend constexpr year_month_day |
| 2420 | operator+(const year_month_day& __ymd, const months& __dm) noexcept |
| 2421 | { return (__ymd.year() / __ymd.month() + __dm) / __ymd.day(); } |
| 2422 | |
| 2423 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 2424 | friend constexpr year_month_day |
| 2425 | operator+(const months& __dm, const year_month_day& __ymd) noexcept |
| 2426 | { return __ymd + __dm; } |
| 2427 | |
| 2428 | friend constexpr year_month_day |
| 2429 | operator+(const year_month_day& __ymd, const years& __dy) noexcept |
| 2430 | { return (__ymd.year() + __dy) / __ymd.month() / __ymd.day(); } |
| 2431 | |
| 2432 | friend constexpr year_month_day |
| 2433 | operator+(const years& __dy, const year_month_day& __ymd) noexcept |
| 2434 | { return __ymd + __dy; } |
| 2435 | |
| 2436 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 2437 | friend constexpr year_month_day |
| 2438 | operator-(const year_month_day& __ymd, const months& __dm) noexcept |
| 2439 | { return __ymd + -__dm; } |
| 2440 | |
| 2441 | friend constexpr year_month_day |
| 2442 | operator-(const year_month_day& __ymd, const years& __dy) noexcept |
| 2443 | { return __ymd + -__dy; } |
| 2444 | |
| 2445 | friend constexpr year_month_day |
| 2446 | operator/(const year_month& __ym, const chrono::day& __d) noexcept |
| 2447 | { return {__ym.year(), __ym.month(), __d}; } |
| 2448 | |
| 2449 | friend constexpr year_month_day |
| 2450 | operator/(const year_month& __ym, int __d) noexcept |
| 2451 | { return __ym / chrono::day{unsigned(__d)}; } |
| 2452 | |
| 2453 | friend constexpr year_month_day |
| 2454 | operator/(const chrono::year& __y, const month_day& __md) noexcept |
| 2455 | { return __y / __md.month() / __md.day(); } |
| 2456 | |
| 2457 | friend constexpr year_month_day |
| 2458 | operator/(int __y, const month_day& __md) noexcept |
| 2459 | { return chrono::year{__y} / __md; } |
| 2460 | |
| 2461 | friend constexpr year_month_day |
| 2462 | operator/(const month_day& __md, const chrono::year& __y) noexcept |
| 2463 | { return __y / __md; } |
| 2464 | |
| 2465 | friend constexpr year_month_day |
| 2466 | operator/(const month_day& __md, int __y) noexcept |
| 2467 | { return chrono::year(__y) / __md; } |
| 2468 | |
| 2469 | // TODO: Implement operator<<, from_stream. |
| 2470 | }; |
| 2471 | |
| 2472 | // Construct from days since 1970/01/01. |
| 2473 | // Proposition 6.3 of Neri and Schneider, |
| 2474 | // "Euclidean Affine Functions and Applications to Calendar Algorithms". |
| 2475 | // https://arxiv.org/abs/2102.06959 |
| 2476 | constexpr year_month_day |
| 2477 | year_month_day::_S_from_days(const days& __dp) noexcept |
| 2478 | { |
| 2479 | constexpr auto __z2 = static_cast<uint32_t>(-1468000); |
| 2480 | constexpr auto __r2_e3 = static_cast<uint32_t>(536895458); |
| 2481 | |
| 2482 | const auto __r0 = static_cast<uint32_t>(__dp.count()) + __r2_e3; |
| 2483 | |
| 2484 | const auto __n1 = 4 * __r0 + 3; |
| 2485 | const auto __q1 = __n1 / 146097; |
| 2486 | const auto __r1 = __n1 % 146097 / 4; |
| 2487 | |
| 2488 | constexpr auto __p32 = static_cast<uint64_t>(1) << 32; |
| 2489 | const auto __n2 = 4 * __r1 + 3; |
| 2490 | const auto __u2 = static_cast<uint64_t>(2939745) * __n2; |
| 2491 | const auto __q2 = static_cast<uint32_t>(__u2 / __p32); |
| 2492 | const auto __r2 = static_cast<uint32_t>(__u2 % __p32) / 2939745 / 4; |
| 2493 | |
| 2494 | constexpr auto __p16 = static_cast<uint32_t>(1) << 16; |
| 2495 | const auto __n3 = 2141 * __r2 + 197913; |
| 2496 | const auto __q3 = __n3 / __p16; |
| 2497 | const auto __r3 = __n3 % __p16 / 2141; |
| 2498 | |
| 2499 | const auto __y0 = 100 * __q1 + __q2; |
| 2500 | const auto __m0 = __q3; |
| 2501 | const auto __d0 = __r3; |
| 2502 | |
| 2503 | const auto __j = __r2 >= 306; |
| 2504 | const auto __y1 = __y0 + __j; |
| 2505 | const auto __m1 = __j ? __m0 - 12 : __m0; |
| 2506 | const auto __d1 = __d0 + 1; |
| 2507 | |
| 2508 | return year_month_day{chrono::year{static_cast<int>(__y1 + __z2)}, |
| 2509 | chrono::month{__m1}, chrono::day{__d1}}; |
| 2510 | } |
| 2511 | |
| 2512 | // Days since 1970/01/01. |
| 2513 | // Proposition 6.2 of Neri and Schneider, |
| 2514 | // "Euclidean Affine Functions and Applications to Calendar Algorithms". |
| 2515 | // https://arxiv.org/abs/2102.06959 |
| 2516 | constexpr days |
| 2517 | year_month_day::_M_days_since_epoch() const noexcept |
| 2518 | { |
| 2519 | auto constexpr __z2 = static_cast<uint32_t>(-1468000); |
| 2520 | auto constexpr __r2_e3 = static_cast<uint32_t>(536895458); |
| 2521 | |
| 2522 | const auto __y1 = static_cast<uint32_t>(static_cast<int>(_M_y)) - __z2; |
| 2523 | const auto __m1 = static_cast<uint32_t>(static_cast<unsigned>(_M_m)); |
| 2524 | const auto __d1 = static_cast<uint32_t>(static_cast<unsigned>(_M_d)); |
| 2525 | |
| 2526 | const auto __j = static_cast<uint32_t>(__m1 < 3); |
| 2527 | const auto __y0 = __y1 - __j; |
| 2528 | const auto __m0 = __j ? __m1 + 12 : __m1; |
| 2529 | const auto __d0 = __d1 - 1; |
| 2530 | |
| 2531 | const auto __q1 = __y0 / 100; |
| 2532 | const auto __yc = 1461 * __y0 / 4 - __q1 + __q1 / 4; |
| 2533 | const auto __mc = (979 *__m0 - 2919) / 32; |
| 2534 | const auto __dc = __d0; |
| 2535 | |
| 2536 | return days{static_cast<int32_t>(__yc + __mc + __dc - __r2_e3)}; |
| 2537 | } |
| 2538 | |
| 2539 | // YEAR_MONTH_DAY_LAST |
| 2540 | |
| 2541 | class year_month_day_last |
| 2542 | { |
| 2543 | private: |
| 2544 | chrono::year _M_y; |
| 2545 | chrono::month_day_last _M_mdl; |
| 2546 | |
| 2547 | public: |
| 2548 | constexpr |
| 2549 | year_month_day_last(const chrono::year& __y, |
| 2550 | const chrono::month_day_last& __mdl) noexcept |
| 2551 | : _M_y{__y}, _M_mdl{__mdl} |
| 2552 | { } |
| 2553 | |
| 2554 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 2555 | constexpr year_month_day_last& |
| 2556 | operator+=(const months& __m) noexcept |
| 2557 | { |
| 2558 | *this = *this + __m; |
| 2559 | return *this; |
| 2560 | } |
| 2561 | |
| 2562 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 2563 | constexpr year_month_day_last& |
| 2564 | operator-=(const months& __m) noexcept |
| 2565 | { |
| 2566 | *this = *this - __m; |
| 2567 | return *this; |
| 2568 | } |
| 2569 | |
| 2570 | constexpr year_month_day_last& |
| 2571 | operator+=(const years& __y) noexcept |
| 2572 | { |
| 2573 | *this = *this + __y; |
| 2574 | return *this; |
| 2575 | } |
| 2576 | |
| 2577 | constexpr year_month_day_last& |
| 2578 | operator-=(const years& __y) noexcept |
| 2579 | { |
| 2580 | *this = *this - __y; |
| 2581 | return *this; |
| 2582 | } |
| 2583 | |
| 2584 | constexpr chrono::year |
| 2585 | year() const noexcept |
| 2586 | { return _M_y; } |
| 2587 | |
| 2588 | constexpr chrono::month |
| 2589 | month() const noexcept |
| 2590 | { return _M_mdl.month(); } |
| 2591 | |
| 2592 | constexpr chrono::month_day_last |
| 2593 | month_day_last() const noexcept |
| 2594 | { return _M_mdl; } |
| 2595 | |
| 2596 | // Return A day representing the last day of this year, month pair. |
| 2597 | constexpr chrono::day |
| 2598 | day() const noexcept |
| 2599 | { |
| 2600 | const auto __m = static_cast<unsigned>(month()); |
| 2601 | |
| 2602 | // Excluding February, the last day of month __m is either 30 or 31 or, |
| 2603 | // in another words, it is 30 + b = 30 | b, where b is in {0, 1}. |
| 2604 | |
| 2605 | // If __m in {1, 3, 4, 5, 6, 7}, then b is 1 if, and only if __m is odd. |
| 2606 | // Hence, b = __m & 1 = (__m ^ 0) & 1. |
| 2607 | |
| 2608 | // If __m in {8, 9, 10, 11, 12}, then b is 1 if, and only if __m is even. |
| 2609 | // Hence, b = (__m ^ 1) & 1. |
| 2610 | |
| 2611 | // Therefore, b = (__m ^ c) & 1, where c = 0, if __m < 8, or c = 1 if |
| 2612 | // __m >= 8, that is, c = __m >> 3. |
| 2613 | |
| 2614 | // The above mathematically justifies this implementation whose |
| 2615 | // performance does not depend on look-up tables being on the L1 cache. |
| 2616 | return chrono::day{__m != 2 ? ((__m ^ (__m >> 3)) & 1) | 30 |
| 2617 | : _M_y.is_leap() ? 29 : 28}; |
| 2618 | } |
| 2619 | |
| 2620 | constexpr |
| 2621 | operator sys_days() const noexcept |
| 2622 | { return sys_days{year() / month() / day()}; } |
| 2623 | |
| 2624 | explicit constexpr |
| 2625 | operator local_days() const noexcept |
| 2626 | { return local_days{sys_days{*this}.time_since_epoch()}; } |
| 2627 | |
| 2628 | constexpr bool |
| 2629 | ok() const noexcept |
| 2630 | { return _M_y.ok() && _M_mdl.ok(); } |
| 2631 | |
| 2632 | friend constexpr bool |
| 2633 | operator==(const year_month_day_last& __x, |
| 2634 | const year_month_day_last& __y) noexcept |
| 2635 | { |
| 2636 | return __x.year() == __y.year() |
| 2637 | && __x.month_day_last() == __y.month_day_last(); |
| 2638 | } |
| 2639 | |
| 2640 | friend constexpr strong_ordering |
| 2641 | operator<=>(const year_month_day_last& __x, |
| 2642 | const year_month_day_last& __y) noexcept |
| 2643 | = default; |
| 2644 | |
| 2645 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 2646 | friend constexpr year_month_day_last |
| 2647 | operator+(const year_month_day_last& __ymdl, |
| 2648 | const months& __dm) noexcept |
| 2649 | { return (__ymdl.year() / __ymdl.month() + __dm) / last; } |
| 2650 | |
| 2651 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 2652 | friend constexpr year_month_day_last |
| 2653 | operator+(const months& __dm, |
| 2654 | const year_month_day_last& __ymdl) noexcept |
| 2655 | { return __ymdl + __dm; } |
| 2656 | |
| 2657 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 2658 | friend constexpr year_month_day_last |
| 2659 | operator-(const year_month_day_last& __ymdl, |
| 2660 | const months& __dm) noexcept |
| 2661 | { return __ymdl + -__dm; } |
| 2662 | |
| 2663 | friend constexpr year_month_day_last |
| 2664 | operator+(const year_month_day_last& __ymdl, |
| 2665 | const years& __dy) noexcept |
| 2666 | { return {__ymdl.year() + __dy, __ymdl.month_day_last()}; } |
| 2667 | |
| 2668 | friend constexpr year_month_day_last |
| 2669 | operator+(const years& __dy, |
| 2670 | const year_month_day_last& __ymdl) noexcept |
| 2671 | { return __ymdl + __dy; } |
| 2672 | |
| 2673 | friend constexpr year_month_day_last |
| 2674 | operator-(const year_month_day_last& __ymdl, |
| 2675 | const years& __dy) noexcept |
| 2676 | { return __ymdl + -__dy; } |
| 2677 | |
| 2678 | friend constexpr year_month_day_last |
| 2679 | operator/(const year_month& __ym, last_spec) noexcept |
| 2680 | { return {__ym.year(), chrono::month_day_last{__ym.month()}}; } |
| 2681 | |
| 2682 | friend constexpr year_month_day_last |
| 2683 | operator/(const chrono::year& __y, |
| 2684 | const chrono::month_day_last& __mdl) noexcept |
| 2685 | { return {__y, __mdl}; } |
| 2686 | |
| 2687 | friend constexpr year_month_day_last |
| 2688 | operator/(int __y, const chrono::month_day_last& __mdl) noexcept |
| 2689 | { return chrono::year(__y) / __mdl; } |
| 2690 | |
| 2691 | friend constexpr year_month_day_last |
| 2692 | operator/(const chrono::month_day_last& __mdl, |
| 2693 | const chrono::year& __y) noexcept |
| 2694 | { return __y / __mdl; } |
| 2695 | |
| 2696 | friend constexpr year_month_day_last |
| 2697 | operator/(const chrono::month_day_last& __mdl, int __y) noexcept |
| 2698 | { return chrono::year(__y) / __mdl; } |
| 2699 | |
| 2700 | // TODO: Implement operator<<. |
| 2701 | }; |
| 2702 | |
| 2703 | // year_month_day ctor from year_month_day_last |
| 2704 | constexpr |
| 2705 | year_month_day::year_month_day(const year_month_day_last& __ymdl) noexcept |
| 2706 | : _M_y{__ymdl.year()}, _M_m{__ymdl.month()}, _M_d{__ymdl.day()} |
| 2707 | { } |
| 2708 | |
| 2709 | constexpr bool |
| 2710 | year_month_day::ok() const noexcept |
| 2711 | { |
| 2712 | if (!_M_y.ok() || !_M_m.ok()) |
| 2713 | return false; |
| 2714 | return chrono::day{1} <= _M_d && _M_d <= (_M_y / _M_m / last).day(); |
| 2715 | } |
| 2716 | |
| 2717 | // YEAR_MONTH_WEEKDAY |
| 2718 | |
| 2719 | class year_month_weekday |
| 2720 | { |
| 2721 | private: |
| 2722 | chrono::year _M_y; |
| 2723 | chrono::month _M_m; |
| 2724 | chrono::weekday_indexed _M_wdi; |
| 2725 | |
| 2726 | static constexpr year_month_weekday |
| 2727 | _S_from_sys_days(const sys_days& __dp) |
| 2728 | { |
| 2729 | year_month_day __ymd{__dp}; |
| 2730 | chrono::weekday __wd{__dp}; |
| 2731 | auto __index = __wd[(unsigned{__ymd.day()} - 1) / 7 + 1]; |
| 2732 | return {__ymd.year(), __ymd.month(), __index}; |
| 2733 | } |
| 2734 | |
| 2735 | public: |
| 2736 | year_month_weekday() = default; |
| 2737 | |
| 2738 | constexpr |
| 2739 | year_month_weekday(const chrono::year& __y, const chrono::month& __m, |
| 2740 | const chrono::weekday_indexed& __wdi) noexcept |
| 2741 | : _M_y{__y}, _M_m{__m}, _M_wdi{__wdi} |
| 2742 | { } |
| 2743 | |
| 2744 | constexpr |
| 2745 | year_month_weekday(const sys_days& __dp) noexcept |
| 2746 | : year_month_weekday{_S_from_sys_days(__dp)} |
| 2747 | { } |
| 2748 | |
| 2749 | explicit constexpr |
| 2750 | year_month_weekday(const local_days& __dp) noexcept |
| 2751 | : year_month_weekday{sys_days{__dp.time_since_epoch()}} |
| 2752 | { } |
| 2753 | |
| 2754 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 2755 | constexpr year_month_weekday& |
| 2756 | operator+=(const months& __m) noexcept |
| 2757 | { |
| 2758 | *this = *this + __m; |
| 2759 | return *this; |
| 2760 | } |
| 2761 | |
| 2762 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 2763 | constexpr year_month_weekday& |
| 2764 | operator-=(const months& __m) noexcept |
| 2765 | { |
| 2766 | *this = *this - __m; |
| 2767 | return *this; |
| 2768 | } |
| 2769 | |
| 2770 | constexpr year_month_weekday& |
| 2771 | operator+=(const years& __y) noexcept |
| 2772 | { |
| 2773 | *this = *this + __y; |
| 2774 | return *this; |
| 2775 | } |
| 2776 | |
| 2777 | constexpr year_month_weekday& |
| 2778 | operator-=(const years& __y) noexcept |
| 2779 | { |
| 2780 | *this = *this - __y; |
| 2781 | return *this; |
| 2782 | } |
| 2783 | |
| 2784 | constexpr chrono::year |
| 2785 | year() const noexcept |
| 2786 | { return _M_y; } |
| 2787 | |
| 2788 | constexpr chrono::month |
| 2789 | month() const noexcept |
| 2790 | { return _M_m; } |
| 2791 | |
| 2792 | constexpr chrono::weekday |
| 2793 | weekday() const noexcept |
| 2794 | { return _M_wdi.weekday(); } |
| 2795 | |
| 2796 | constexpr unsigned |
| 2797 | index() const noexcept |
| 2798 | { return _M_wdi.index(); } |
| 2799 | |
| 2800 | constexpr chrono::weekday_indexed |
| 2801 | weekday_indexed() const noexcept |
| 2802 | { return _M_wdi; } |
| 2803 | |
| 2804 | constexpr |
| 2805 | operator sys_days() const noexcept |
| 2806 | { |
| 2807 | auto __d = sys_days{year() / month() / 1}; |
| 2808 | return __d + (weekday() - chrono::weekday(__d) |
| 2809 | + days{(static_cast<int>(index())-1)*7}); |
| 2810 | } |
| 2811 | |
| 2812 | explicit constexpr |
| 2813 | operator local_days() const noexcept |
| 2814 | { return local_days{sys_days{*this}.time_since_epoch()}; } |
| 2815 | |
| 2816 | constexpr bool |
| 2817 | ok() const noexcept |
| 2818 | { |
| 2819 | if (!_M_y.ok() || !_M_m.ok() || !_M_wdi.ok()) |
| 2820 | return false; |
| 2821 | if (_M_wdi.index() <= 4) |
| 2822 | return true; |
| 2823 | days __d = (_M_wdi.weekday() |
| 2824 | - chrono::weekday{sys_days{_M_y / _M_m / 1}} |
| 2825 | + days((_M_wdi.index()-1)*7 + 1)); |
| 2826 | __glibcxx_assert(__d.count() >= 1); |
| 2827 | return __d.count() <= unsigned{(_M_y / _M_m / last).day()}; |
| 2828 | } |
| 2829 | |
| 2830 | friend constexpr bool |
| 2831 | operator==(const year_month_weekday& __x, |
| 2832 | const year_month_weekday& __y) noexcept |
| 2833 | { |
| 2834 | return __x.year() == __y.year() |
| 2835 | && __x.month() == __y.month() |
| 2836 | && __x.weekday_indexed() == __y.weekday_indexed(); |
| 2837 | } |
| 2838 | |
| 2839 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 2840 | friend constexpr year_month_weekday |
| 2841 | operator+(const year_month_weekday& __ymwd, const months& __dm) noexcept |
| 2842 | { |
| 2843 | return ((__ymwd.year() / __ymwd.month() + __dm) |
| 2844 | / __ymwd.weekday_indexed()); |
| 2845 | } |
| 2846 | |
| 2847 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 2848 | friend constexpr year_month_weekday |
| 2849 | operator+(const months& __dm, const year_month_weekday& __ymwd) noexcept |
| 2850 | { return __ymwd + __dm; } |
| 2851 | |
| 2852 | friend constexpr year_month_weekday |
| 2853 | operator+(const year_month_weekday& __ymwd, const years& __dy) noexcept |
| 2854 | { return {__ymwd.year() + __dy, __ymwd.month(), __ymwd.weekday_indexed()}; } |
| 2855 | |
| 2856 | friend constexpr year_month_weekday |
| 2857 | operator+(const years& __dy, const year_month_weekday& __ymwd) noexcept |
| 2858 | { return __ymwd + __dy; } |
| 2859 | |
| 2860 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 2861 | friend constexpr year_month_weekday |
| 2862 | operator-(const year_month_weekday& __ymwd, const months& __dm) noexcept |
| 2863 | { return __ymwd + -__dm; } |
| 2864 | |
| 2865 | friend constexpr year_month_weekday |
| 2866 | operator-(const year_month_weekday& __ymwd, const years& __dy) noexcept |
| 2867 | { return __ymwd + -__dy; } |
| 2868 | |
| 2869 | friend constexpr year_month_weekday |
| 2870 | operator/(const year_month& __ym, |
| 2871 | const chrono::weekday_indexed& __wdi) noexcept |
| 2872 | { return {__ym.year(), __ym.month(), __wdi}; } |
| 2873 | |
| 2874 | friend constexpr year_month_weekday |
| 2875 | operator/(const chrono::year& __y, const month_weekday& __mwd) noexcept |
| 2876 | { return {__y, __mwd.month(), __mwd.weekday_indexed()}; } |
| 2877 | |
| 2878 | friend constexpr year_month_weekday |
| 2879 | operator/(int __y, const month_weekday& __mwd) noexcept |
| 2880 | { return chrono::year(__y) / __mwd; } |
| 2881 | |
| 2882 | friend constexpr year_month_weekday |
| 2883 | operator/(const month_weekday& __mwd, const chrono::year& __y) noexcept |
| 2884 | { return __y / __mwd; } |
| 2885 | |
| 2886 | friend constexpr year_month_weekday |
| 2887 | operator/(const month_weekday& __mwd, int __y) noexcept |
| 2888 | { return chrono::year(__y) / __mwd; } |
| 2889 | |
| 2890 | // TODO: Implement operator<<. |
| 2891 | }; |
| 2892 | |
| 2893 | // YEAR_MONTH_WEEKDAY_LAST |
| 2894 | |
| 2895 | class year_month_weekday_last |
| 2896 | { |
| 2897 | private: |
| 2898 | chrono::year _M_y; |
| 2899 | chrono::month _M_m; |
| 2900 | chrono::weekday_last _M_wdl; |
| 2901 | |
| 2902 | public: |
| 2903 | constexpr |
| 2904 | year_month_weekday_last(const chrono::year& __y, const chrono::month& __m, |
| 2905 | const chrono::weekday_last& __wdl) noexcept |
| 2906 | : _M_y{__y}, _M_m{__m}, _M_wdl{__wdl} |
| 2907 | { } |
| 2908 | |
| 2909 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 2910 | constexpr year_month_weekday_last& |
| 2911 | operator+=(const months& __m) noexcept |
| 2912 | { |
| 2913 | *this = *this + __m; |
| 2914 | return *this; |
| 2915 | } |
| 2916 | |
| 2917 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 2918 | constexpr year_month_weekday_last& |
| 2919 | operator-=(const months& __m) noexcept |
| 2920 | { |
| 2921 | *this = *this - __m; |
| 2922 | return *this; |
| 2923 | } |
| 2924 | |
| 2925 | constexpr year_month_weekday_last& |
| 2926 | operator+=(const years& __y) noexcept |
| 2927 | { |
| 2928 | *this = *this + __y; |
| 2929 | return *this; |
| 2930 | } |
| 2931 | |
| 2932 | constexpr year_month_weekday_last& |
| 2933 | operator-=(const years& __y) noexcept |
| 2934 | { |
| 2935 | *this = *this - __y; |
| 2936 | return *this; |
| 2937 | } |
| 2938 | |
| 2939 | constexpr chrono::year |
| 2940 | year() const noexcept |
| 2941 | { return _M_y; } |
| 2942 | |
| 2943 | constexpr chrono::month |
| 2944 | month() const noexcept |
| 2945 | { return _M_m; } |
| 2946 | |
| 2947 | constexpr chrono::weekday |
| 2948 | weekday() const noexcept |
| 2949 | { return _M_wdl.weekday(); } |
| 2950 | |
| 2951 | constexpr chrono::weekday_last |
| 2952 | weekday_last() const noexcept |
| 2953 | { return _M_wdl; } |
| 2954 | |
| 2955 | constexpr |
| 2956 | operator sys_days() const noexcept |
| 2957 | { |
| 2958 | const auto __d = sys_days{_M_y / _M_m / last}; |
| 2959 | return sys_days{(__d - (chrono::weekday{__d} |
| 2960 | - _M_wdl.weekday())).time_since_epoch()}; |
| 2961 | } |
| 2962 | |
| 2963 | explicit constexpr |
| 2964 | operator local_days() const noexcept |
| 2965 | { return local_days{sys_days{*this}.time_since_epoch()}; } |
| 2966 | |
| 2967 | constexpr bool |
| 2968 | ok() const noexcept |
| 2969 | { return _M_y.ok() && _M_m.ok() && _M_wdl.ok(); } |
| 2970 | |
| 2971 | friend constexpr bool |
| 2972 | operator==(const year_month_weekday_last& __x, |
| 2973 | const year_month_weekday_last& __y) noexcept |
| 2974 | { |
| 2975 | return __x.year() == __y.year() |
| 2976 | && __x.month() == __y.month() |
| 2977 | && __x.weekday_last() == __y.weekday_last(); |
| 2978 | } |
| 2979 | |
| 2980 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 2981 | friend constexpr year_month_weekday_last |
| 2982 | operator+(const year_month_weekday_last& __ymwdl, |
| 2983 | const months& __dm) noexcept |
| 2984 | { |
| 2985 | return ((__ymwdl.year() / __ymwdl.month() + __dm) |
| 2986 | / __ymwdl.weekday_last()); |
| 2987 | } |
| 2988 | |
| 2989 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 2990 | friend constexpr year_month_weekday_last |
| 2991 | operator+(const months& __dm, |
| 2992 | const year_month_weekday_last& __ymwdl) noexcept |
| 2993 | { return __ymwdl + __dm; } |
| 2994 | |
| 2995 | friend constexpr year_month_weekday_last |
| 2996 | operator+(const year_month_weekday_last& __ymwdl, |
| 2997 | const years& __dy) noexcept |
| 2998 | { return {__ymwdl.year() + __dy, __ymwdl.month(), __ymwdl.weekday_last()}; } |
| 2999 | |
| 3000 | friend constexpr year_month_weekday_last |
| 3001 | operator+(const years& __dy, |
| 3002 | const year_month_weekday_last& __ymwdl) noexcept |
| 3003 | { return __ymwdl + __dy; } |
| 3004 | |
| 3005 | template<typename = __detail::__months_years_conversion_disambiguator> |
| 3006 | friend constexpr year_month_weekday_last |
| 3007 | operator-(const year_month_weekday_last& __ymwdl, |
| 3008 | const months& __dm) noexcept |
| 3009 | { return __ymwdl + -__dm; } |
| 3010 | |
| 3011 | friend constexpr year_month_weekday_last |
| 3012 | operator-(const year_month_weekday_last& __ymwdl, |
| 3013 | const years& __dy) noexcept |
| 3014 | { return __ymwdl + -__dy; } |
| 3015 | |
| 3016 | friend constexpr year_month_weekday_last |
| 3017 | operator/(const year_month& __ym, |
| 3018 | const chrono::weekday_last& __wdl) noexcept |
| 3019 | { return {__ym.year(), __ym.month(), __wdl}; } |
| 3020 | |
| 3021 | friend constexpr year_month_weekday_last |
| 3022 | operator/(const chrono::year& __y, |
| 3023 | const chrono::month_weekday_last& __mwdl) noexcept |
| 3024 | { return {__y, __mwdl.month(), __mwdl.weekday_last()}; } |
| 3025 | |
| 3026 | friend constexpr year_month_weekday_last |
| 3027 | operator/(int __y, const chrono::month_weekday_last& __mwdl) noexcept |
| 3028 | { return chrono::year(__y) / __mwdl; } |
| 3029 | |
| 3030 | friend constexpr year_month_weekday_last |
| 3031 | operator/(const chrono::month_weekday_last& __mwdl, |
| 3032 | const chrono::year& __y) noexcept |
| 3033 | { return __y / __mwdl; } |
| 3034 | |
| 3035 | friend constexpr year_month_weekday_last |
| 3036 | operator/(const chrono::month_weekday_last& __mwdl, int __y) noexcept |
| 3037 | { return chrono::year(__y) / __mwdl; } |
| 3038 | |
| 3039 | // TODO: Implement operator<<. |
| 3040 | }; |
| 3041 | |
| 3042 | // HH_MM_SS |
| 3043 | |
| 3044 | namespace __detail |
| 3045 | { |
| 3046 | consteval long long |
| 3047 | __pow10(unsigned __n) |
| 3048 | { |
| 3049 | long long __r = 1; |
| 3050 | while (__n-- > 0) |
| 3051 | __r *= 10; |
| 3052 | return __r; |
| 3053 | } |
| 3054 | } |
| 3055 | |
| 3056 | template<typename _Duration> |
| 3057 | class hh_mm_ss |
| 3058 | { |
| 3059 | private: |
| 3060 | static constexpr int |
| 3061 | _S_fractional_width() |
| 3062 | { |
| 3063 | int __multiplicity_2 = 0; |
| 3064 | int __multiplicity_5 = 0; |
| 3065 | auto __den = _Duration::period::den; |
| 3066 | while ((__den % 2) == 0) |
| 3067 | { |
| 3068 | ++__multiplicity_2; |
| 3069 | __den /= 2; |
| 3070 | } |
| 3071 | while ((__den % 5) == 0) |
| 3072 | { |
| 3073 | ++__multiplicity_5; |
| 3074 | __den /= 5; |
| 3075 | } |
| 3076 | if (__den != 1) |
| 3077 | return 6; |
| 3078 | |
| 3079 | int __width = (__multiplicity_2 > __multiplicity_5 |
| 3080 | ? __multiplicity_2 : __multiplicity_5); |
| 3081 | if (__width > 18) |
| 3082 | __width = 18; |
| 3083 | return __width; |
| 3084 | } |
| 3085 | |
| 3086 | public: |
| 3087 | static constexpr unsigned fractional_width = {_S_fractional_width()}; |
| 3088 | |
| 3089 | using precision |
| 3090 | = duration<common_type_t<typename _Duration::rep, |
| 3091 | chrono::seconds::rep>, |
| 3092 | ratio<1, __detail::__pow10(fractional_width)>>; |
| 3093 | |
| 3094 | constexpr |
| 3095 | hh_mm_ss() noexcept |
| 3096 | : hh_mm_ss{_Duration::zero()} |
| 3097 | { } |
| 3098 | |
| 3099 | constexpr explicit |
| 3100 | hh_mm_ss(_Duration __d) noexcept |
| 3101 | : _M_is_neg (__d < _Duration::zero()), |
| 3102 | _M_h (duration_cast<chrono::hours>(abs(__d))), |
| 3103 | _M_m (duration_cast<chrono::minutes>(abs(__d) - hours())), |
| 3104 | _M_s (duration_cast<chrono::seconds>(abs(__d) - hours() - minutes())) |
| 3105 | { |
| 3106 | if constexpr (treat_as_floating_point_v<typename precision::rep>) |
| 3107 | _M_ss = abs(__d) - hours() - minutes() - seconds(); |
| 3108 | else |
| 3109 | _M_ss = duration_cast<precision>(abs(__d) - hours() |
| 3110 | - minutes() - seconds()); |
| 3111 | } |
| 3112 | |
| 3113 | constexpr bool |
| 3114 | is_negative() const noexcept |
| 3115 | { return _M_is_neg; } |
| 3116 | |
| 3117 | constexpr chrono::hours |
| 3118 | hours() const noexcept |
| 3119 | { return _M_h; } |
| 3120 | |
| 3121 | constexpr chrono::minutes |
| 3122 | minutes() const noexcept |
| 3123 | { return _M_m; } |
| 3124 | |
| 3125 | constexpr chrono::seconds |
| 3126 | seconds() const noexcept |
| 3127 | { return _M_s; } |
| 3128 | |
| 3129 | constexpr precision |
| 3130 | subseconds() const noexcept |
| 3131 | { return _M_ss; } |
| 3132 | |
| 3133 | constexpr explicit |
| 3134 | operator precision() const noexcept |
| 3135 | { return to_duration(); } |
| 3136 | |
| 3137 | constexpr precision |
| 3138 | to_duration() const noexcept |
| 3139 | { |
| 3140 | if (_M_is_neg) |
| 3141 | return -(_M_h + _M_m + _M_s + _M_ss); |
| 3142 | else |
| 3143 | return _M_h + _M_m + _M_s + _M_ss; |
| 3144 | } |
| 3145 | |
| 3146 | // TODO: Implement operator<<. |
| 3147 | |
| 3148 | private: |
| 3149 | bool _M_is_neg; |
| 3150 | chrono::hours _M_h; |
| 3151 | chrono::minutes _M_m; |
| 3152 | chrono::seconds _M_s; |
| 3153 | precision _M_ss; |
| 3154 | }; |
| 3155 | #endif // C++20 |
| 3156 | |
| 3157 | /// @} group chrono |
| 3158 | } // namespace chrono |
| 3159 | |
| 3160 | #if __cplusplus > 201103L |
| 3161 | |
| 3162 | #define __cpp_lib_chrono_udls 201304 |
| 3163 | |
| 3164 | inline namespace literals |
| 3165 | { |
| 3166 | /** ISO C++ 2014 namespace for suffixes for duration literals. |
| 3167 | * |
| 3168 | * These suffixes can be used to create `chrono::duration` values with |
| 3169 | * tick periods of hours, minutes, seconds, milliseconds, microseconds |
| 3170 | * or nanoseconds. For example, `std::chrono::seconds(5)` can be written |
| 3171 | * as `5s` after making the suffix visible in the current scope. |
| 3172 | * The suffixes can be made visible by a using-directive or |
| 3173 | * using-declaration such as: |
| 3174 | * - `using namespace std::chrono_literals;` |
| 3175 | * - `using namespace std::literals;` |
| 3176 | * - `using namespace std::chrono;` |
| 3177 | * - `using namespace std;` |
| 3178 | * - `using std::chrono_literals::operator""s;` |
| 3179 | * |
| 3180 | * The result of these suffixes on an integer literal is one of the |
| 3181 | * standard typedefs such as `std::chrono::hours`. |
| 3182 | * The result on a floating-point literal is a duration type with the |
| 3183 | * specified tick period and an unspecified floating-point representation, |
| 3184 | * for example `1.5e2ms` might be equivalent to |
| 3185 | * `chrono::duration<long double, chrono::milli>(1.5e2)`. |
| 3186 | * |
| 3187 | * @ingroup chrono |
| 3188 | */ |
| 3189 | inline namespace chrono_literals |
| 3190 | { |
| 3191 | /// @addtogroup chrono |
| 3192 | /// @{ |
| 3193 | |
| 3194 | #pragma GCC diagnostic push |
| 3195 | #pragma GCC diagnostic ignored "-Wliteral-suffix" |
| 3196 | /// @cond undocumented |
| 3197 | template<typename _Dur, char... _Digits> |
| 3198 | constexpr _Dur __check_overflow() |
| 3199 | { |
| 3200 | using _Val = __parse_int::_Parse_int<_Digits...>; |
| 3201 | constexpr typename _Dur::rep __repval = _Val::value; |
| 3202 | static_assert(__repval >= 0 && __repval == _Val::value, |
| 3203 | "literal value cannot be represented by duration type"); |
| 3204 | return _Dur(__repval); |
| 3205 | } |
| 3206 | /// @endcond |
| 3207 | |
| 3208 | /// Literal suffix for durations representing non-integer hours |
| 3209 | constexpr chrono::duration<long double, ratio<3600,1>> |
| 3210 | operator""h(long double __hours) |
| 3211 | { return chrono::duration<long double, ratio<3600,1>>{__hours}; } |
| 3212 | |
| 3213 | /// Literal suffix for durations of type `std::chrono::hours` |
| 3214 | template <char... _Digits> |
| 3215 | constexpr chrono::hours |
| 3216 | operator""h() |
| 3217 | { return __check_overflow<chrono::hours, _Digits...>(); } |
| 3218 | |
| 3219 | /// Literal suffix for durations representing non-integer minutes |
| 3220 | constexpr chrono::duration<long double, ratio<60,1>> |
| 3221 | operator""min(long double __mins) |
| 3222 | { return chrono::duration<long double, ratio<60,1>>{__mins}; } |
| 3223 | |
| 3224 | /// Literal suffix for durations of type `std::chrono::minutes` |
| 3225 | template <char... _Digits> |
| 3226 | constexpr chrono::minutes |
| 3227 | operator""min() |
| 3228 | { return __check_overflow<chrono::minutes, _Digits...>(); } |
| 3229 | |
| 3230 | /// Literal suffix for durations representing non-integer seconds |
| 3231 | constexpr chrono::duration<long double> |
| 3232 | operator""s(long double __secs) |
| 3233 | { return chrono::duration<long double>{__secs}; } |
| 3234 | |
| 3235 | /// Literal suffix for durations of type `std::chrono::seconds` |
| 3236 | template <char... _Digits> |
| 3237 | constexpr chrono::seconds |
| 3238 | operator""s() |
| 3239 | { return __check_overflow<chrono::seconds, _Digits...>(); } |
| 3240 | |
| 3241 | /// Literal suffix for durations representing non-integer milliseconds |
| 3242 | constexpr chrono::duration<long double, milli> |
| 3243 | operator""ms(long double __msecs) |
| 3244 | { return chrono::duration<long double, milli>{__msecs}; } |
| 3245 | |
| 3246 | /// Literal suffix for durations of type `std::chrono::milliseconds` |
| 3247 | template <char... _Digits> |
| 3248 | constexpr chrono::milliseconds |
| 3249 | operator""ms() |
| 3250 | { return __check_overflow<chrono::milliseconds, _Digits...>(); } |
| 3251 | |
| 3252 | /// Literal suffix for durations representing non-integer microseconds |
| 3253 | constexpr chrono::duration<long double, micro> |
| 3254 | operator""us(long double __usecs) |
| 3255 | { return chrono::duration<long double, micro>{__usecs}; } |
| 3256 | |
| 3257 | /// Literal suffix for durations of type `std::chrono::microseconds` |
| 3258 | template <char... _Digits> |
| 3259 | constexpr chrono::microseconds |
| 3260 | operator""us() |
| 3261 | { return __check_overflow<chrono::microseconds, _Digits...>(); } |
| 3262 | |
| 3263 | /// Literal suffix for durations representing non-integer nanoseconds |
| 3264 | constexpr chrono::duration<long double, nano> |
| 3265 | operator""ns(long double __nsecs) |
| 3266 | { return chrono::duration<long double, nano>{__nsecs}; } |
| 3267 | |
| 3268 | /// Literal suffix for durations of type `std::chrono::nanoseconds` |
| 3269 | template <char... _Digits> |
| 3270 | constexpr chrono::nanoseconds |
| 3271 | operator""ns() |
| 3272 | { return __check_overflow<chrono::nanoseconds, _Digits...>(); } |
| 3273 | |
| 3274 | #if __cplusplus > 201703L |
| 3275 | constexpr chrono::day |
| 3276 | operator""d(unsigned long long __d) noexcept |
| 3277 | { return chrono::day{static_cast<unsigned>(__d)}; } |
| 3278 | |
| 3279 | constexpr chrono::year |
| 3280 | operator""y(unsigned long long __y) noexcept |
| 3281 | { return chrono::year{static_cast<int>(__y)}; } |
| 3282 | #endif // C++20 |
| 3283 | |
| 3284 | #pragma GCC diagnostic pop |
| 3285 | /// @} |
| 3286 | } // inline namespace chrono_literals |
| 3287 | } // inline namespace literals |
| 3288 | |
| 3289 | namespace chrono |
| 3290 | { |
| 3291 | using namespace literals::chrono_literals; |
| 3292 | } // namespace chrono |
| 3293 | |
| 3294 | #if __cplusplus > 201703L |
| 3295 | namespace chrono |
| 3296 | { |
| 3297 | /// @addtogroup chrono |
| 3298 | /// @{ |
| 3299 | |
| 3300 | // 12/24 HOURS FUNCTIONS |
| 3301 | |
| 3302 | constexpr bool |
| 3303 | is_am(const hours& __h) noexcept |
| 3304 | { return 0h <= __h && __h <= 11h; } |
| 3305 | |
| 3306 | constexpr bool |
| 3307 | is_pm(const hours& __h) noexcept |
| 3308 | { return 12h <= __h && __h <= 23h; } |
| 3309 | |
| 3310 | constexpr hours |
| 3311 | make12(const hours& __h) noexcept |
| 3312 | { |
| 3313 | if (__h == 0h) |
| 3314 | return 12h; |
| 3315 | else if (__h > 12h) |
| 3316 | return __h - 12h; |
| 3317 | return __h; |
| 3318 | } |
| 3319 | |
| 3320 | constexpr hours |
| 3321 | make24(const hours& __h, bool __is_pm) noexcept |
| 3322 | { |
| 3323 | if (!__is_pm) |
| 3324 | { |
| 3325 | if (__h == 12h) |
| 3326 | return 0h; |
| 3327 | else |
| 3328 | return __h; |
| 3329 | } |
| 3330 | else |
| 3331 | { |
| 3332 | if (__h == 12h) |
| 3333 | return __h; |
| 3334 | else |
| 3335 | return __h + 12h; |
| 3336 | } |
| 3337 | } |
| 3338 | /// @} group chrono |
| 3339 | } // namespace chrono |
| 3340 | #endif |
| 3341 | |
| 3342 | #if __cplusplus >= 201703L |
| 3343 | namespace filesystem |
| 3344 | { |
| 3345 | struct __file_clock |
| 3346 | { |
| 3347 | using duration = chrono::nanoseconds; |
| 3348 | using rep = duration::rep; |
| 3349 | using period = duration::period; |
| 3350 | using time_point = chrono::time_point<__file_clock>; |
| 3351 | static constexpr bool is_steady = false; |
| 3352 | |
| 3353 | static time_point |
| 3354 | now() noexcept |
| 3355 | { return _S_from_sys(chrono::system_clock::now()); } |
| 3356 | |
| 3357 | #if __cplusplus > 201703L |
| 3358 | template<typename _Dur> |
| 3359 | static |
| 3360 | chrono::file_time<_Dur> |
| 3361 | from_sys(const chrono::sys_time<_Dur>& __t) noexcept |
| 3362 | { return _S_from_sys(__t); } |
| 3363 | |
| 3364 | // For internal use only |
| 3365 | template<typename _Dur> |
| 3366 | static |
| 3367 | chrono::sys_time<_Dur> |
| 3368 | to_sys(const chrono::file_time<_Dur>& __t) noexcept |
| 3369 | { return _S_to_sys(__t); } |
| 3370 | #endif // C++20 |
| 3371 | |
| 3372 | private: |
| 3373 | using __sys_clock = chrono::system_clock; |
| 3374 | |
| 3375 | // This clock's (unspecified) epoch is 2174-01-01 00:00:00 UTC. |
| 3376 | // A signed 64-bit duration with nanosecond resolution gives roughly |
| 3377 | // +/- 292 years, which covers the 1901-2446 date range for ext4. |
| 3378 | static constexpr chrono::seconds _S_epoch_diff{6437664000}; |
| 3379 | |
| 3380 | protected: |
| 3381 | // For internal use only |
| 3382 | template<typename _Dur> |
| 3383 | static |
| 3384 | chrono::time_point<__file_clock, _Dur> |
| 3385 | _S_from_sys(const chrono::time_point<__sys_clock, _Dur>& __t) noexcept |
| 3386 | { |
| 3387 | using __file_time = chrono::time_point<__file_clock, _Dur>; |
| 3388 | return __file_time{__t.time_since_epoch()} - _S_epoch_diff; |
| 3389 | } |
| 3390 | |
| 3391 | // For internal use only |
| 3392 | template<typename _Dur> |
| 3393 | static |
| 3394 | chrono::time_point<__sys_clock, _Dur> |
| 3395 | _S_to_sys(const chrono::time_point<__file_clock, _Dur>& __t) noexcept |
| 3396 | { |
| 3397 | using __sys_time = chrono::time_point<__sys_clock, _Dur>; |
| 3398 | return __sys_time{__t.time_since_epoch()} + _S_epoch_diff; |
| 3399 | } |
| 3400 | }; |
| 3401 | } // namespace filesystem |
| 3402 | #endif // C++17 |
| 3403 | #endif // C++14 |
| 3404 | |
| 3405 | _GLIBCXX_END_NAMESPACE_VERSION |
| 3406 | } // namespace std |
| 3407 | |
| 3408 | #endif // C++11 |
| 3409 | |
| 3410 | #endif //_GLIBCXX_CHRONO |
| 3411 |
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