libcxx/include/__chrono/duration.h

   1 // -*- C++ -*-
   2 //===----------------------------------------------------------------------===//
   3 //
   4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   5 // See https://llvm.org/LICENSE.txt for license information.
   6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #ifndef _LIBCPP___CHRONO_DURATION_H
  11 #define _LIBCPP___CHRONO_DURATION_H
  12
  13 #include <__compare/ordering.h>
  14 #include <__compare/three_way_comparable.h>
  15 #include <__config>
  16 #include <__type_traits/common_type.h>
  17 #include <__type_traits/enable_if.h>
  18 #include <__type_traits/is_convertible.h>
  19 #include <__type_traits/is_floating_point.h>
  20 #include <limits>
  21 #include <ratio>
  22
  23 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  24 #  pragma GCC system_header
  25 #endif
  26
  27 _LIBCPP_PUSH_MACROS
  28 #include <__undef_macros>
  29
  30 _LIBCPP_BEGIN_NAMESPACE_STD
  31
  32 namespace chrono {
  33
  34 template <class _Rep, class _Period = ratio<1> >
  35 class _LIBCPP_TEMPLATE_VIS duration;
  36
  37 template <class _Tp>
  38 inline const bool __is_duration_v = false;
  39
  40 template <class _Rep, class _Period>
  41 inline const bool __is_duration_v<duration<_Rep, _Period> > = true;
  42
  43 template <class _Rep, class _Period>
  44 inline const bool __is_duration_v<const duration<_Rep, _Period> > = true;
  45
  46 template <class _Rep, class _Period>
  47 inline const bool __is_duration_v<volatile duration<_Rep, _Period> > = true;
  48
  49 template <class _Rep, class _Period>
  50 inline const bool __is_duration_v<const volatile duration<_Rep, _Period> > = true;
  51
  52 } // namespace chrono
  53
  54 template <class _Rep1, class _Period1, class _Rep2, class _Period2>
  55 struct _LIBCPP_TEMPLATE_VIS common_type<chrono::duration<_Rep1, _Period1>, chrono::duration<_Rep2, _Period2> > {
  56   typedef chrono::duration<typename common_type<_Rep1, _Rep2>::type, __ratio_gcd<_Period1, _Period2> > type;
  57 };
  58
  59 namespace chrono {
  60
  61 // duration_cast
  62
  63 template <class _FromDuration,
  64           class _ToDuration,
  65           class _Period = typename ratio_divide<typename _FromDuration::period, typename _ToDuration::period>::type,
  66           bool          = _Period::num == 1,
  67           bool          = _Period::den == 1>
  68 struct __duration_cast;
  69
  70 template <class _FromDuration, class _ToDuration, class _Period>
  71 struct __duration_cast<_FromDuration, _ToDuration, _Period, true, true> {
  72   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR _ToDuration operator()(const _FromDuration& __fd) const {
  73     return _ToDuration(static_cast<typename _ToDuration::rep>(__fd.count()));
  74   }
  75 };
  76
  77 template <class _FromDuration, class _ToDuration, class _Period>
  78 struct __duration_cast<_FromDuration, _ToDuration, _Period, true, false> {
  79   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR _ToDuration operator()(const _FromDuration& __fd) const {
  80     typedef typename common_type<typename _ToDuration::rep, typename _FromDuration::rep, intmax_t>::type _Ct;
  81     return _ToDuration(
  82         static_cast<typename _ToDuration::rep>(static_cast<_Ct>(__fd.count()) / static_cast<_Ct>(_Period::den)));
  83   }
  84 };
  85
  86 template <class _FromDuration, class _ToDuration, class _Period>
  87 struct __duration_cast<_FromDuration, _ToDuration, _Period, false, true> {
  88   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR _ToDuration operator()(const _FromDuration& __fd) const {
  89     typedef typename common_type<typename _ToDuration::rep, typename _FromDuration::rep, intmax_t>::type _Ct;
  90     return _ToDuration(
  91         static_cast<typename _ToDuration::rep>(static_cast<_Ct>(__fd.count()) * static_cast<_Ct>(_Period::num)));
  92   }
  93 };
  94
  95 template <class _FromDuration, class _ToDuration, class _Period>
  96 struct __duration_cast<_FromDuration, _ToDuration, _Period, false, false> {
  97   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR _ToDuration operator()(const _FromDuration& __fd) const {
  98     typedef typename common_type<typename _ToDuration::rep, typename _FromDuration::rep, intmax_t>::type _Ct;
  99     return _ToDuration(static_cast<typename _ToDuration::rep>(
 100         static_cast<_Ct>(__fd.count()) * static_cast<_Ct>(_Period::num) / static_cast<_Ct>(_Period::den)));
 101   }
 102 };
 103
 104 template <class _ToDuration, class _Rep, class _Period, __enable_if_t<__is_duration_v<_ToDuration>, int> = 0>
 105 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR _ToDuration duration_cast(const duration<_Rep, _Period>& __fd) {
 106   return __duration_cast<duration<_Rep, _Period>, _ToDuration>()(__fd);
 107 }
 108
 109 template <class _Rep>
 110 struct _LIBCPP_TEMPLATE_VIS treat_as_floating_point : is_floating_point<_Rep> {};
 111
 112 #if _LIBCPP_STD_VER >= 17
 113 template <class _Rep>
 114 inline constexpr bool treat_as_floating_point_v = treat_as_floating_point<_Rep>::value;
 115 #endif
 116
 117 template <class _Rep>
 118 struct _LIBCPP_TEMPLATE_VIS duration_values {
 119 public:
 120   _LIBCPP_HIDE_FROM_ABI static _LIBCPP_CONSTEXPR _Rep zero() _NOEXCEPT { return _Rep(0); }
 121   _LIBCPP_HIDE_FROM_ABI static _LIBCPP_CONSTEXPR _Rep max() _NOEXCEPT { return numeric_limits<_Rep>::max(); }
 122   _LIBCPP_HIDE_FROM_ABI static _LIBCPP_CONSTEXPR _Rep min() _NOEXCEPT { return numeric_limits<_Rep>::lowest(); }
 123 };
 124
 125 #if _LIBCPP_STD_VER >= 17
 126 template <class _ToDuration, class _Rep, class _Period, enable_if_t<__is_duration_v<_ToDuration>, int> = 0>
 127 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR _ToDuration floor(const duration<_Rep, _Period>& __d) {
 128   _ToDuration __t = chrono::duration_cast<_ToDuration>(__d);
 129   if (__t > __d)
 130     __t = __t - _ToDuration{1};
 131   return __t;
 132 }
 133
 134 template <class _ToDuration, class _Rep, class _Period, enable_if_t<__is_duration_v<_ToDuration>, int> = 0>
 135 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR _ToDuration ceil(const duration<_Rep, _Period>& __d) {
 136   _ToDuration __t = chrono::duration_cast<_ToDuration>(__d);
 137   if (__t < __d)
 138     __t = __t + _ToDuration{1};
 139   return __t;
 140 }
 141
 142 template <class _ToDuration, class _Rep, class _Period, enable_if_t<__is_duration_v<_ToDuration>, int> = 0>
 143 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR _ToDuration round(const duration<_Rep, _Period>& __d) {
 144   _ToDuration __lower = chrono::floor<_ToDuration>(__d);
 145   _ToDuration __upper = __lower + _ToDuration{1};
 146   auto __lower_diff   = __d - __lower;
 147   auto __upper_diff   = __upper - __d;
 148   if (__lower_diff < __upper_diff)
 149     return __lower;
 150   if (__lower_diff > __upper_diff)
 151     return __upper;
 152   return __lower.count() & 1 ? __upper : __lower;
 153 }
 154 #endif
 155
 156 // duration
 157
 158 template <class _Rep, class _Period>
 159 class _LIBCPP_TEMPLATE_VIS duration {
 160   static_assert(!__is_duration_v<_Rep>, "A duration representation can not be a duration");
 161   static_assert(__is_ratio_v<_Period>, "Second template parameter of duration must be a std::ratio");
 162   static_assert(_Period::num > 0, "duration period must be positive");
 163
 164   template <class _R1, class _R2>
 165   struct __no_overflow {
 166   private:
 167     static const intmax_t __gcd_n1_n2 = __static_gcd<_R1::num, _R2::num>;
 168     static const intmax_t __gcd_d1_d2 = __static_gcd<_R1::den, _R2::den>;
 169     static const intmax_t __n1        = _R1::num / __gcd_n1_n2;
 170     static const intmax_t __d1        = _R1::den / __gcd_d1_d2;
 171     static const intmax_t __n2        = _R2::num / __gcd_n1_n2;
 172     static const intmax_t __d2        = _R2::den / __gcd_d1_d2;
 173     static const intmax_t max         = -((intmax_t(1) << (sizeof(intmax_t) * CHAR_BIT - 1)) + 1);
 174
 175     template <intmax_t _Xp, intmax_t _Yp, bool __overflow>
 176     struct __mul // __overflow == false
 177     {
 178       static const intmax_t value = _Xp * _Yp;
 179     };
 180
 181     template <intmax_t _Xp, intmax_t _Yp>
 182     struct __mul<_Xp, _Yp, true> {
 183       static const intmax_t value = 1;
 184     };
 185
 186   public:
 187     static const bool value = (__n1 <= max / __d2) && (__n2 <= max / __d1);
 188     typedef ratio<__mul<__n1, __d2, !value>::value, __mul<__n2, __d1, !value>::value> type;
 189   };
 190
 191 public:
 192   typedef _Rep rep;
 193   typedef typename _Period::type period;
 194
 195 private:
 196   rep __rep_;
 197
 198 public:
 199 #ifndef _LIBCPP_CXX03_LANG
 200   constexpr duration() = default;
 201 #else
 202   _LIBCPP_HIDE_FROM_ABI duration() {}
 203 #endif
 204
 205   template <class _Rep2,
 206             __enable_if_t<is_convertible<const _Rep2&, rep>::value &&
 207                               (treat_as_floating_point<rep>::value || !treat_as_floating_point<_Rep2>::value),
 208                           int> = 0>
 209   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR explicit duration(const _Rep2& __r) : __rep_(__r) {}
 210
 211   // conversions
 212   template <class _Rep2,
 213             class _Period2,
 214             __enable_if_t<__no_overflow<_Period2, period>::value && (treat_as_floating_point<rep>::value ||
 215                                                                      (__no_overflow<_Period2, period>::type::den == 1 &&
 216                                                                       !treat_as_floating_point<_Rep2>::value)),
 217                           int> = 0>
 218   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR duration(const duration<_Rep2, _Period2>& __d)
 219       : __rep_(chrono::duration_cast<duration>(__d).count()) {}
 220
 221   // observer
 222
 223   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR rep count() const { return __rep_; }
 224
 225   // arithmetic
 226
 227   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR typename common_type<duration>::type operator+() const {
 228     return typename common_type<duration>::type(*this);
 229   }
 230   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR typename common_type<duration>::type operator-() const {
 231     return typename common_type<duration>::type(-__rep_);
 232   }
 233   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17 duration& operator++() {
 234     ++__rep_;
 235     return *this;
 236   }
 237   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17 duration operator++(int) { return duration(__rep_++); }
 238   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17 duration& operator--() {
 239     --__rep_;
 240     return *this;
 241   }
 242   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17 duration operator--(int) { return duration(__rep_--); }
 243
 244   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17 duration& operator+=(const duration& __d) {
 245     __rep_ += __d.count();
 246     return *this;
 247   }
 248   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17 duration& operator-=(const duration& __d) {
 249     __rep_ -= __d.count();
 250     return *this;
 251   }
 252
 253   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17 duration& operator*=(const rep& __rhs) {
 254     __rep_ *= __rhs;
 255     return *this;
 256   }
 257   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17 duration& operator/=(const rep& __rhs) {
 258     __rep_ /= __rhs;
 259     return *this;
 260   }
 261   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17 duration& operator%=(const rep& __rhs) {
 262     __rep_ %= __rhs;
 263     return *this;
 264   }
 265   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17 duration& operator%=(const duration& __rhs) {
 266     __rep_ %= __rhs.count();
 267     return *this;
 268   }
 269
 270   // special values
 271
 272   _LIBCPP_HIDE_FROM_ABI static _LIBCPP_CONSTEXPR duration zero() _NOEXCEPT {
 273     return duration(duration_values<rep>::zero());
 274   }
 275   _LIBCPP_HIDE_FROM_ABI static _LIBCPP_CONSTEXPR duration min() _NOEXCEPT {
 276     return duration(duration_values<rep>::min());
 277   }
 278   _LIBCPP_HIDE_FROM_ABI static _LIBCPP_CONSTEXPR duration max() _NOEXCEPT {
 279     return duration(duration_values<rep>::max());
 280   }
 281 };
 282
 283 typedef duration<long long, nano> nanoseconds;
 284 typedef duration<long long, micro> microseconds;
 285 typedef duration<long long, milli> milliseconds;
 286 typedef duration<long long > seconds;
 287 typedef duration< long, ratio< 60> > minutes;
 288 typedef duration< long, ratio<3600> > hours;
 289 #if _LIBCPP_STD_VER >= 20
 290 typedef duration< int, ratio_multiply<ratio<24>, hours::period>> days;
 291 typedef duration< int, ratio_multiply<ratio<7>, days::period>> weeks;
 292 typedef duration< int, ratio_multiply<ratio<146097, 400>, days::period>> years;
 293 typedef duration< int, ratio_divide<years::period, ratio<12>>> months;
 294 #endif
 295 // Duration ==
 296
 297 template <class _LhsDuration, class _RhsDuration>
 298 struct __duration_eq {
 299   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR bool operator()(const _LhsDuration& __lhs, const _RhsDuration& __rhs) const {
 300     typedef typename common_type<_LhsDuration, _RhsDuration>::type _Ct;
 301     return _Ct(__lhs).count() == _Ct(__rhs).count();
 302   }
 303 };
 304
 305 template <class _LhsDuration>
 306 struct __duration_eq<_LhsDuration, _LhsDuration> {
 307   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR bool operator()(const _LhsDuration& __lhs, const _LhsDuration& __rhs) const {
 308     return __lhs.count() == __rhs.count();
 309   }
 310 };
 311
 312 template <class _Rep1, class _Period1, class _Rep2, class _Period2>
 313 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR bool
 314 operator==(const duration<_Rep1, _Period1>& __lhs, const duration<_Rep2, _Period2>& __rhs) {
 315   return __duration_eq<duration<_Rep1, _Period1>, duration<_Rep2, _Period2> >()(__lhs, __rhs);
 316 }
 317
 318 #if _LIBCPP_STD_VER <= 17
 319
 320 // Duration !=
 321
 322 template <class _Rep1, class _Period1, class _Rep2, class _Period2>
 323 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR bool
 324 operator!=(const duration<_Rep1, _Period1>& __lhs, const duration<_Rep2, _Period2>& __rhs) {
 325   return !(__lhs == __rhs);
 326 }
 327
 328 #endif // _LIBCPP_STD_VER <= 17
 329
 330 // Duration <
 331
 332 template <class _LhsDuration, class _RhsDuration>
 333 struct __duration_lt {
 334   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR bool operator()(const _LhsDuration& __lhs, const _RhsDuration& __rhs) const {
 335     typedef typename common_type<_LhsDuration, _RhsDuration>::type _Ct;
 336     return _Ct(__lhs).count() < _Ct(__rhs).count();
 337   }
 338 };
 339
 340 template <class _LhsDuration>
 341 struct __duration_lt<_LhsDuration, _LhsDuration> {
 342   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR bool operator()(const _LhsDuration& __lhs, const _LhsDuration& __rhs) const {
 343     return __lhs.count() < __rhs.count();
 344   }
 345 };
 346
 347 template <class _Rep1, class _Period1, class _Rep2, class _Period2>
 348 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR bool
 349 operator<(const duration<_Rep1, _Period1>& __lhs, const duration<_Rep2, _Period2>& __rhs) {
 350   return __duration_lt<duration<_Rep1, _Period1>, duration<_Rep2, _Period2> >()(__lhs, __rhs);
 351 }
 352
 353 // Duration >
 354
 355 template <class _Rep1, class _Period1, class _Rep2, class _Period2>
 356 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR bool
 357 operator>(const duration<_Rep1, _Period1>& __lhs, const duration<_Rep2, _Period2>& __rhs) {
 358   return __rhs < __lhs;
 359 }
 360
 361 // Duration <=
 362
 363 template <class _Rep1, class _Period1, class _Rep2, class _Period2>
 364 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR bool
 365 operator<=(const duration<_Rep1, _Period1>& __lhs, const duration<_Rep2, _Period2>& __rhs) {
 366   return !(__rhs < __lhs);
 367 }
 368
 369 // Duration >=
 370
 371 template <class _Rep1, class _Period1, class _Rep2, class _Period2>
 372 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR bool
 373 operator>=(const duration<_Rep1, _Period1>& __lhs, const duration<_Rep2, _Period2>& __rhs) {
 374   return !(__lhs < __rhs);
 375 }
 376
 377 #if _LIBCPP_STD_VER >= 20
 378
 379 template <class _Rep1, class _Period1, class _Rep2, class _Period2>
 380   requires three_way_comparable<common_type_t<_Rep1, _Rep2>>
 381 _LIBCPP_HIDE_FROM_ABI constexpr auto
 382 operator<=>(const duration<_Rep1, _Period1>& __lhs, const duration<_Rep2, _Period2>& __rhs) {
 383   using _Ct = common_type_t<duration<_Rep1, _Period1>, duration<_Rep2, _Period2>>;
 384   return _Ct(__lhs).count() <=> _Ct(__rhs).count();
 385 }
 386
 387 #endif // _LIBCPP_STD_VER >= 20
 388
 389 // Duration +
 390
 391 template <class _Rep1, class _Period1, class _Rep2, class _Period2>
 392 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR
 393 typename common_type<duration<_Rep1, _Period1>, duration<_Rep2, _Period2> >::type
 394 operator+(const duration<_Rep1, _Period1>& __lhs, const duration<_Rep2, _Period2>& __rhs) {
 395   typedef typename common_type<duration<_Rep1, _Period1>, duration<_Rep2, _Period2> >::type _Cd;
 396   return _Cd(_Cd(__lhs).count() + _Cd(__rhs).count());
 397 }
 398
 399 // Duration -
 400
 401 template <class _Rep1, class _Period1, class _Rep2, class _Period2>
 402 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR
 403 typename common_type<duration<_Rep1, _Period1>, duration<_Rep2, _Period2> >::type
 404 operator-(const duration<_Rep1, _Period1>& __lhs, const duration<_Rep2, _Period2>& __rhs) {
 405   typedef typename common_type<duration<_Rep1, _Period1>, duration<_Rep2, _Period2> >::type _Cd;
 406   return _Cd(_Cd(__lhs).count() - _Cd(__rhs).count());
 407 }
 408
 409 // Duration *
 410
 411 template <class _Rep1,
 412           class _Period,
 413           class _Rep2,
 414           __enable_if_t<is_convertible<const _Rep2&, typename common_type<_Rep1, _Rep2>::type>::value, int> = 0>
 415 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR duration<typename common_type<_Rep1, _Rep2>::type, _Period>
 416 operator*(const duration<_Rep1, _Period>& __d, const _Rep2& __s) {
 417   typedef typename common_type<_Rep1, _Rep2>::type _Cr;
 418   typedef duration<_Cr, _Period> _Cd;
 419   return _Cd(_Cd(__d).count() * static_cast<_Cr>(__s));
 420 }
 421
 422 template <class _Rep1,
 423           class _Period,
 424           class _Rep2,
 425           __enable_if_t<is_convertible<const _Rep1&, typename common_type<_Rep1, _Rep2>::type>::value, int> = 0>
 426 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR duration<typename common_type<_Rep1, _Rep2>::type, _Period>
 427 operator*(const _Rep1& __s, const duration<_Rep2, _Period>& __d) {
 428   return __d * __s;
 429 }
 430
 431 // Duration /
 432
 433 template <class _Rep1,
 434           class _Period,
 435           class _Rep2,
 436           __enable_if_t<!__is_duration_v<_Rep2> &&
 437                             is_convertible<const _Rep2&, typename common_type<_Rep1, _Rep2>::type>::value,
 438                         int> = 0>
 439 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR duration<typename common_type<_Rep1, _Rep2>::type, _Period>
 440 operator/(const duration<_Rep1, _Period>& __d, const _Rep2& __s) {
 441   typedef typename common_type<_Rep1, _Rep2>::type _Cr;
 442   typedef duration<_Cr, _Period> _Cd;
 443   return _Cd(_Cd(__d).count() / static_cast<_Cr>(__s));
 444 }
 445
 446 template <class _Rep1, class _Period1, class _Rep2, class _Period2>
 447 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR typename common_type<_Rep1, _Rep2>::type
 448 operator/(const duration<_Rep1, _Period1>& __lhs, const duration<_Rep2, _Period2>& __rhs) {
 449   typedef typename common_type<duration<_Rep1, _Period1>, duration<_Rep2, _Period2> >::type _Ct;
 450   return _Ct(__lhs).count() / _Ct(__rhs).count();
 451 }
 452
 453 // Duration %
 454
 455 template <class _Rep1,
 456           class _Period,
 457           class _Rep2,
 458           __enable_if_t<!__is_duration_v<_Rep2> &&
 459                             is_convertible<const _Rep2&, typename common_type<_Rep1, _Rep2>::type>::value,
 460                         int> = 0>
 461 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR duration<typename common_type<_Rep1, _Rep2>::type, _Period>
 462 operator%(const duration<_Rep1, _Period>& __d, const _Rep2& __s) {
 463   typedef typename common_type<_Rep1, _Rep2>::type _Cr;
 464   typedef duration<_Cr, _Period> _Cd;
 465   return _Cd(_Cd(__d).count() % static_cast<_Cr>(__s));
 466 }
 467
 468 template <class _Rep1, class _Period1, class _Rep2, class _Period2>
 469 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR
 470 typename common_type<duration<_Rep1, _Period1>, duration<_Rep2, _Period2> >::type
 471 operator%(const duration<_Rep1, _Period1>& __lhs, const duration<_Rep2, _Period2>& __rhs) {
 472   typedef typename common_type<_Rep1, _Rep2>::type _Cr;
 473   typedef typename common_type<duration<_Rep1, _Period1>, duration<_Rep2, _Period2> >::type _Cd;
 474   return _Cd(static_cast<_Cr>(_Cd(__lhs).count()) % static_cast<_Cr>(_Cd(__rhs).count()));
 475 }
 476
 477 } // namespace chrono
 478
 479 #if _LIBCPP_STD_VER >= 14
 480 // Suffixes for duration literals [time.duration.literals]
 481 inline namespace literals {
 482 inline namespace chrono_literals {
 483
 484 _LIBCPP_HIDE_FROM_ABI constexpr chrono::hours operator""h(unsigned long long __h) {
 485   return chrono::hours(static_cast<chrono::hours::rep>(__h));
 486 }
 487
 488 _LIBCPP_HIDE_FROM_ABI constexpr chrono::duration<long double, ratio<3600, 1>> operator""h(long double __h) {
 489   return chrono::duration<long double, ratio<3600, 1>>(__h);
 490 }
 491
 492 _LIBCPP_HIDE_FROM_ABI constexpr chrono::minutes operator""min(unsigned long long __m) {
 493   return chrono::minutes(static_cast<chrono::minutes::rep>(__m));
 494 }
 495
 496 _LIBCPP_HIDE_FROM_ABI constexpr chrono::duration<long double, ratio<60, 1>> operator""min(long double __m) {
 497   return chrono::duration<long double, ratio<60, 1>>(__m);
 498 }
 499
 500 _LIBCPP_HIDE_FROM_ABI constexpr chrono::seconds operator""s(unsigned long long __s) {
 501   return chrono::seconds(static_cast<chrono::seconds::rep>(__s));
 502 }
 503
 504 _LIBCPP_HIDE_FROM_ABI constexpr chrono::duration<long double> operator""s(long double __s) {
 505   return chrono::duration<long double>(__s);
 506 }
 507
 508 _LIBCPP_HIDE_FROM_ABI constexpr chrono::milliseconds operator""ms(unsigned long long __ms) {
 509   return chrono::milliseconds(static_cast<chrono::milliseconds::rep>(__ms));
 510 }
 511
 512 _LIBCPP_HIDE_FROM_ABI constexpr chrono::duration<long double, milli> operator""ms(long double __ms) {
 513   return chrono::duration<long double, milli>(__ms);
 514 }
 515
 516 _LIBCPP_HIDE_FROM_ABI constexpr chrono::microseconds operator""us(unsigned long long __us) {
 517   return chrono::microseconds(static_cast<chrono::microseconds::rep>(__us));
 518 }
 519
 520 _LIBCPP_HIDE_FROM_ABI constexpr chrono::duration<long double, micro> operator""us(long double __us) {
 521   return chrono::duration<long double, micro>(__us);
 522 }
 523
 524 _LIBCPP_HIDE_FROM_ABI constexpr chrono::nanoseconds operator""ns(unsigned long long __ns) {
 525   return chrono::nanoseconds(static_cast<chrono::nanoseconds::rep>(__ns));
 526 }
 527
 528 _LIBCPP_HIDE_FROM_ABI constexpr chrono::duration<long double, nano> operator""ns(long double __ns) {
 529   return chrono::duration<long double, nano>(__ns);
 530 }
 531
 532 } // namespace chrono_literals
 533 } // namespace literals
 534
 535 namespace chrono { // hoist the literals into namespace std::chrono
 536 using namespace literals::chrono_literals;
 537 } // namespace chrono
 538
 539 #endif // _LIBCPP_STD_VER >= 14
 540
 541 _LIBCPP_END_NAMESPACE_STD
 542
 543 _LIBCPP_POP_MACROS
 544
 545 #endif // _LIBCPP___CHRONO_DURATION_H