__cxx03/__chrono/duration.h

0001 // -*- C++ -*-
0002 //===----------------------------------------------------------------------===//
0003 //
0004 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
0005 // See https://llvm.org/LICENSE.txt for license information.
0006 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
0007 //
0008 //===----------------------------------------------------------------------===//
0009
0010 #ifndef _LIBCPP___CXX03___CHRONO_DURATION_H
0011 #define _LIBCPP___CXX03___CHRONO_DURATION_H
0012
0013 #include <__cxx03/__compare/ordering.h>
0014 #include <__cxx03/__compare/three_way_comparable.h>
0015 #include <__cxx03/__config>
0016 #include <__cxx03/__type_traits/common_type.h>
0017 #include <__cxx03/__type_traits/enable_if.h>
0018 #include <__cxx03/__type_traits/is_convertible.h>
0019 #include <__cxx03/__type_traits/is_floating_point.h>
0020 #include <__cxx03/limits>
0021 #include <__cxx03/ratio>
0022
0023 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
0024 #  pragma GCC system_header
0025 #endif
0026
0027 _LIBCPP_PUSH_MACROS
0028 #include <__cxx03/__undef_macros>
0029
0030 _LIBCPP_BEGIN_NAMESPACE_STD
0031
0032 namespace chrono {
0033
0034 template <class _Rep, class _Period = ratio<1> >
0035 class _LIBCPP_TEMPLATE_VIS duration;
0036
0037 template <class _Tp>
0038 struct __is_duration : false_type {};
0039
0040 template <class _Rep, class _Period>
0041 struct __is_duration<duration<_Rep, _Period> > : true_type {};
0042
0043 template <class _Rep, class _Period>
0044 struct __is_duration<const duration<_Rep, _Period> > : true_type {};
0045
0046 template <class _Rep, class _Period>
0047 struct __is_duration<volatile duration<_Rep, _Period> > : true_type {};
0048
0049 template <class _Rep, class _Period>
0050 struct __is_duration<const volatile duration<_Rep, _Period> > : true_type {};
0051
0052 } // namespace chrono
0053
0054 template <class _Rep1, class _Period1, class _Rep2, class _Period2>
0055 struct _LIBCPP_TEMPLATE_VIS common_type<chrono::duration<_Rep1, _Period1>, chrono::duration<_Rep2, _Period2> > {
0056   typedef chrono::duration<typename common_type<_Rep1, _Rep2>::type, typename __ratio_gcd<_Period1, _Period2>::type>
0057       type;
0058 };
0059
0060 namespace chrono {
0061
0062 // duration_cast
0063
0064 template <class _FromDuration,
0065           class _ToDuration,
0066           class _Period = typename ratio_divide<typename _FromDuration::period, typename _ToDuration::period>::type,
0067           bool          = _Period::num == 1,
0068           bool          = _Period::den == 1>
0069 struct __duration_cast;
0070
0071 template <class _FromDuration, class _ToDuration, class _Period>
0072 struct __duration_cast<_FromDuration, _ToDuration, _Period, true, true> {
0073   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR _ToDuration operator()(const _FromDuration& __fd) const {
0074     return _ToDuration(static_cast<typename _ToDuration::rep>(__fd.count()));
0075   }
0076 };
0077
0078 template <class _FromDuration, class _ToDuration, class _Period>
0079 struct __duration_cast<_FromDuration, _ToDuration, _Period, true, false> {
0080   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR _ToDuration operator()(const _FromDuration& __fd) const {
0081     typedef typename common_type<typename _ToDuration::rep, typename _FromDuration::rep, intmax_t>::type _Ct;
0082     return _ToDuration(
0083         static_cast<typename _ToDuration::rep>(static_cast<_Ct>(__fd.count()) / static_cast<_Ct>(_Period::den)));
0084   }
0085 };
0086
0087 template <class _FromDuration, class _ToDuration, class _Period>
0088 struct __duration_cast<_FromDuration, _ToDuration, _Period, false, true> {
0089   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR _ToDuration operator()(const _FromDuration& __fd) const {
0090     typedef typename common_type<typename _ToDuration::rep, typename _FromDuration::rep, intmax_t>::type _Ct;
0091     return _ToDuration(
0092         static_cast<typename _ToDuration::rep>(static_cast<_Ct>(__fd.count()) * static_cast<_Ct>(_Period::num)));
0093   }
0094 };
0095
0096 template <class _FromDuration, class _ToDuration, class _Period>
0097 struct __duration_cast<_FromDuration, _ToDuration, _Period, false, false> {
0098   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR _ToDuration operator()(const _FromDuration& __fd) const {
0099     typedef typename common_type<typename _ToDuration::rep, typename _FromDuration::rep, intmax_t>::type _Ct;
0100     return _ToDuration(static_cast<typename _ToDuration::rep>(
0101         static_cast<_Ct>(__fd.count()) * static_cast<_Ct>(_Period::num) / static_cast<_Ct>(_Period::den)));
0102   }
0103 };
0104
0105 template <class _ToDuration, class _Rep, class _Period, __enable_if_t<__is_duration<_ToDuration>::value, int> = 0>
0106 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR _ToDuration duration_cast(const duration<_Rep, _Period>& __fd) {
0107   return __duration_cast<duration<_Rep, _Period>, _ToDuration>()(__fd);
0108 }
0109
0110 template <class _Rep>
0111 struct _LIBCPP_TEMPLATE_VIS treat_as_floating_point : is_floating_point<_Rep> {};
0112
0113 #if _LIBCPP_STD_VER >= 17
0114 template <class _Rep>
0115 inline constexpr bool treat_as_floating_point_v = treat_as_floating_point<_Rep>::value;
0116 #endif
0117
0118 template <class _Rep>
0119 struct _LIBCPP_TEMPLATE_VIS duration_values {
0120 public:
0121   _LIBCPP_HIDE_FROM_ABI static _LIBCPP_CONSTEXPR _Rep zero() _NOEXCEPT { return _Rep(0); }
0122   _LIBCPP_HIDE_FROM_ABI static _LIBCPP_CONSTEXPR _Rep max() _NOEXCEPT { return numeric_limits<_Rep>::max(); }
0123   _LIBCPP_HIDE_FROM_ABI static _LIBCPP_CONSTEXPR _Rep min() _NOEXCEPT { return numeric_limits<_Rep>::lowest(); }
0124 };
0125
0126 #if _LIBCPP_STD_VER >= 17
0127 template <class _ToDuration, class _Rep, class _Period, enable_if_t<__is_duration<_ToDuration>::value, int> = 0>
0128 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR _ToDuration floor(const duration<_Rep, _Period>& __d) {
0129   _ToDuration __t = chrono::duration_cast<_ToDuration>(__d);
0130   if (__t > __d)
0131     __t = __t - _ToDuration{1};
0132   return __t;
0133 }
0134
0135 template <class _ToDuration, class _Rep, class _Period, enable_if_t<__is_duration<_ToDuration>::value, int> = 0>
0136 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR _ToDuration ceil(const duration<_Rep, _Period>& __d) {
0137   _ToDuration __t = chrono::duration_cast<_ToDuration>(__d);
0138   if (__t < __d)
0139     __t = __t + _ToDuration{1};
0140   return __t;
0141 }
0142
0143 template <class _ToDuration, class _Rep, class _Period, enable_if_t<__is_duration<_ToDuration>::value, int> = 0>
0144 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR _ToDuration round(const duration<_Rep, _Period>& __d) {
0145   _ToDuration __lower = chrono::floor<_ToDuration>(__d);
0146   _ToDuration __upper = __lower + _ToDuration{1};
0147   auto __lower_diff   = __d - __lower;
0148   auto __upper_diff   = __upper - __d;
0149   if (__lower_diff < __upper_diff)
0150     return __lower;
0151   if (__lower_diff > __upper_diff)
0152     return __upper;
0153   return __lower.count() & 1 ? __upper : __lower;
0154 }
0155 #endif
0156
0157 // duration
0158
0159 template <class _Rep, class _Period>
0160 class _LIBCPP_TEMPLATE_VIS duration {
0161   static_assert(!__is_duration<_Rep>::value, "A duration representation can not be a duration");
0162   static_assert(__is_ratio<_Period>::value, "Second template parameter of duration must be a std::ratio");
0163   static_assert(_Period::num > 0, "duration period must be positive");
0164
0165   template <class _R1, class _R2>
0166   struct __no_overflow {
0167   private:
0168     static const intmax_t __gcd_n1_n2 = __static_gcd<_R1::num, _R2::num>::value;
0169     static const intmax_t __gcd_d1_d2 = __static_gcd<_R1::den, _R2::den>::value;
0170     static const intmax_t __n1        = _R1::num / __gcd_n1_n2;
0171     static const intmax_t __d1        = _R1::den / __gcd_d1_d2;
0172     static const intmax_t __n2        = _R2::num / __gcd_n1_n2;
0173     static const intmax_t __d2        = _R2::den / __gcd_d1_d2;
0174     static const intmax_t max         = -((intmax_t(1) << (sizeof(intmax_t) * CHAR_BIT - 1)) + 1);
0175
0176     template <intmax_t _Xp, intmax_t _Yp, bool __overflow>
0177     struct __mul // __overflow == false
0178     {
0179       static const intmax_t value = _Xp * _Yp;
0180     };
0181
0182     template <intmax_t _Xp, intmax_t _Yp>
0183     struct __mul<_Xp, _Yp, true> {
0184       static const intmax_t value = 1;
0185     };
0186
0187   public:
0188     static const bool value = (__n1 <= max / __d2) && (__n2 <= max / __d1);
0189     typedef ratio<__mul<__n1, __d2, !value>::value, __mul<__n2, __d1, !value>::value> type;
0190   };
0191
0192 public:
0193   typedef _Rep rep;
0194   typedef typename _Period::type period;
0195
0196 private:
0197   rep __rep_;
0198
0199 public:
0200 #ifndef _LIBCPP_CXX03_LANG
0201   constexpr duration() = default;
0202 #else
0203   _LIBCPP_HIDE_FROM_ABI duration() {}
0204 #endif
0205
0206   template <class _Rep2,
0207             __enable_if_t<is_convertible<const _Rep2&, rep>::value &&
0208                               (treat_as_floating_point<rep>::value || !treat_as_floating_point<_Rep2>::value),
0209                           int> = 0>
0210   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR explicit duration(const _Rep2& __r) : __rep_(__r) {}
0211
0212   // conversions
0213   template <class _Rep2,
0214             class _Period2,
0215             __enable_if_t<__no_overflow<_Period2, period>::value && (treat_as_floating_point<rep>::value ||
0216                                                                      (__no_overflow<_Period2, period>::type::den == 1 &&
0217                                                                       !treat_as_floating_point<_Rep2>::value)),
0218                           int> = 0>
0219   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR duration(const duration<_Rep2, _Period2>& __d)
0220       : __rep_(chrono::duration_cast<duration>(__d).count()) {}
0221
0222   // observer
0223
0224   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR rep count() const { return __rep_; }
0225
0226   // arithmetic
0227
0228   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR typename common_type<duration>::type operator+() const {
0229     return typename common_type<duration>::type(*this);
0230   }
0231   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR typename common_type<duration>::type operator-() const {
0232     return typename common_type<duration>::type(-__rep_);
0233   }
0234   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17 duration& operator++() {
0235     ++__rep_;
0236     return *this;
0237   }
0238   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17 duration operator++(int) { return duration(__rep_++); }
0239   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17 duration& operator--() {
0240     --__rep_;
0241     return *this;
0242   }
0243   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17 duration operator--(int) { return duration(__rep_--); }
0244
0245   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17 duration& operator+=(const duration& __d) {
0246     __rep_ += __d.count();
0247     return *this;
0248   }
0249   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17 duration& operator-=(const duration& __d) {
0250     __rep_ -= __d.count();
0251     return *this;
0252   }
0253
0254   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17 duration& operator*=(const rep& __rhs) {
0255     __rep_ *= __rhs;
0256     return *this;
0257   }
0258   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17 duration& operator/=(const rep& __rhs) {
0259     __rep_ /= __rhs;
0260     return *this;
0261   }
0262   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17 duration& operator%=(const rep& __rhs) {
0263     __rep_ %= __rhs;
0264     return *this;
0265   }
0266   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17 duration& operator%=(const duration& __rhs) {
0267     __rep_ %= __rhs.count();
0268     return *this;
0269   }
0270
0271   // special values
0272
0273   _LIBCPP_HIDE_FROM_ABI static _LIBCPP_CONSTEXPR duration zero() _NOEXCEPT {
0274     return duration(duration_values<rep>::zero());
0275   }
0276   _LIBCPP_HIDE_FROM_ABI static _LIBCPP_CONSTEXPR duration min() _NOEXCEPT {
0277     return duration(duration_values<rep>::min());
0278   }
0279   _LIBCPP_HIDE_FROM_ABI static _LIBCPP_CONSTEXPR duration max() _NOEXCEPT {
0280     return duration(duration_values<rep>::max());
0281   }
0282 };
0283
0284 typedef duration<long long, nano> nanoseconds;
0285 typedef duration<long long, micro> microseconds;
0286 typedef duration<long long, milli> milliseconds;
0287 typedef duration<long long > seconds;
0288 typedef duration< long, ratio< 60> > minutes;
0289 typedef duration< long, ratio<3600> > hours;
0290 #if _LIBCPP_STD_VER >= 20
0291 typedef duration< int, ratio_multiply<ratio<24>, hours::period>> days;
0292 typedef duration< int, ratio_multiply<ratio<7>, days::period>> weeks;
0293 typedef duration< int, ratio_multiply<ratio<146097, 400>, days::period>> years;
0294 typedef duration< int, ratio_divide<years::period, ratio<12>>> months;
0295 #endif
0296 // Duration ==
0297
0298 template <class _LhsDuration, class _RhsDuration>
0299 struct __duration_eq {
0300   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR bool operator()(const _LhsDuration& __lhs, const _RhsDuration& __rhs) const {
0301     typedef typename common_type<_LhsDuration, _RhsDuration>::type _Ct;
0302     return _Ct(__lhs).count() == _Ct(__rhs).count();
0303   }
0304 };
0305
0306 template <class _LhsDuration>
0307 struct __duration_eq<_LhsDuration, _LhsDuration> {
0308   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR bool operator()(const _LhsDuration& __lhs, const _LhsDuration& __rhs) const {
0309     return __lhs.count() == __rhs.count();
0310   }
0311 };
0312
0313 template <class _Rep1, class _Period1, class _Rep2, class _Period2>
0314 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR bool
0315 operator==(const duration<_Rep1, _Period1>& __lhs, const duration<_Rep2, _Period2>& __rhs) {
0316   return __duration_eq<duration<_Rep1, _Period1>, duration<_Rep2, _Period2> >()(__lhs, __rhs);
0317 }
0318
0319 #if _LIBCPP_STD_VER <= 17
0320
0321 // Duration !=
0322
0323 template <class _Rep1, class _Period1, class _Rep2, class _Period2>
0324 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR bool
0325 operator!=(const duration<_Rep1, _Period1>& __lhs, const duration<_Rep2, _Period2>& __rhs) {
0326   return !(__lhs == __rhs);
0327 }
0328
0329 #endif // _LIBCPP_STD_VER <= 17
0330
0331 // Duration <
0332
0333 template <class _LhsDuration, class _RhsDuration>
0334 struct __duration_lt {
0335   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR bool operator()(const _LhsDuration& __lhs, const _RhsDuration& __rhs) const {
0336     typedef typename common_type<_LhsDuration, _RhsDuration>::type _Ct;
0337     return _Ct(__lhs).count() < _Ct(__rhs).count();
0338   }
0339 };
0340
0341 template <class _LhsDuration>
0342 struct __duration_lt<_LhsDuration, _LhsDuration> {
0343   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR bool operator()(const _LhsDuration& __lhs, const _LhsDuration& __rhs) const {
0344     return __lhs.count() < __rhs.count();
0345   }
0346 };
0347
0348 template <class _Rep1, class _Period1, class _Rep2, class _Period2>
0349 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR bool
0350 operator<(const duration<_Rep1, _Period1>& __lhs, const duration<_Rep2, _Period2>& __rhs) {
0351   return __duration_lt<duration<_Rep1, _Period1>, duration<_Rep2, _Period2> >()(__lhs, __rhs);
0352 }
0353
0354 // Duration >
0355
0356 template <class _Rep1, class _Period1, class _Rep2, class _Period2>
0357 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR bool
0358 operator>(const duration<_Rep1, _Period1>& __lhs, const duration<_Rep2, _Period2>& __rhs) {
0359   return __rhs < __lhs;
0360 }
0361
0362 // Duration <=
0363
0364 template <class _Rep1, class _Period1, class _Rep2, class _Period2>
0365 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR bool
0366 operator<=(const duration<_Rep1, _Period1>& __lhs, const duration<_Rep2, _Period2>& __rhs) {
0367   return !(__rhs < __lhs);
0368 }
0369
0370 // Duration >=
0371
0372 template <class _Rep1, class _Period1, class _Rep2, class _Period2>
0373 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR bool
0374 operator>=(const duration<_Rep1, _Period1>& __lhs, const duration<_Rep2, _Period2>& __rhs) {
0375   return !(__lhs < __rhs);
0376 }
0377
0378 #if _LIBCPP_STD_VER >= 20
0379
0380 template <class _Rep1, class _Period1, class _Rep2, class _Period2>
0381   requires three_way_comparable<common_type_t<_Rep1, _Rep2>>
0382 _LIBCPP_HIDE_FROM_ABI constexpr auto
0383 operator<=>(const duration<_Rep1, _Period1>& __lhs, const duration<_Rep2, _Period2>& __rhs) {
0384   using _Ct = common_type_t<duration<_Rep1, _Period1>, duration<_Rep2, _Period2>>;
0385   return _Ct(__lhs).count() <=> _Ct(__rhs).count();
0386 }
0387
0388 #endif // _LIBCPP_STD_VER >= 20
0389
0390 // Duration +
0391
0392 template <class _Rep1, class _Period1, class _Rep2, class _Period2>
0393 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR
0394 typename common_type<duration<_Rep1, _Period1>, duration<_Rep2, _Period2> >::type
0395 operator+(const duration<_Rep1, _Period1>& __lhs, const duration<_Rep2, _Period2>& __rhs) {
0396   typedef typename common_type<duration<_Rep1, _Period1>, duration<_Rep2, _Period2> >::type _Cd;
0397   return _Cd(_Cd(__lhs).count() + _Cd(__rhs).count());
0398 }
0399
0400 // Duration -
0401
0402 template <class _Rep1, class _Period1, class _Rep2, class _Period2>
0403 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR
0404 typename common_type<duration<_Rep1, _Period1>, duration<_Rep2, _Period2> >::type
0405 operator-(const duration<_Rep1, _Period1>& __lhs, const duration<_Rep2, _Period2>& __rhs) {
0406   typedef typename common_type<duration<_Rep1, _Period1>, duration<_Rep2, _Period2> >::type _Cd;
0407   return _Cd(_Cd(__lhs).count() - _Cd(__rhs).count());
0408 }
0409
0410 // Duration *
0411
0412 template <class _Rep1,
0413           class _Period,
0414           class _Rep2,
0415           __enable_if_t<is_convertible<const _Rep2&, typename common_type<_Rep1, _Rep2>::type>::value, int> = 0>
0416 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR duration<typename common_type<_Rep1, _Rep2>::type, _Period>
0417 operator*(const duration<_Rep1, _Period>& __d, const _Rep2& __s) {
0418   typedef typename common_type<_Rep1, _Rep2>::type _Cr;
0419   typedef duration<_Cr, _Period> _Cd;
0420   return _Cd(_Cd(__d).count() * static_cast<_Cr>(__s));
0421 }
0422
0423 template <class _Rep1,
0424           class _Period,
0425           class _Rep2,
0426           __enable_if_t<is_convertible<const _Rep1&, typename common_type<_Rep1, _Rep2>::type>::value, int> = 0>
0427 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR duration<typename common_type<_Rep1, _Rep2>::type, _Period>
0428 operator*(const _Rep1& __s, const duration<_Rep2, _Period>& __d) {
0429   return __d * __s;
0430 }
0431
0432 // Duration /
0433
0434 template <class _Rep1,
0435           class _Period,
0436           class _Rep2,
0437           __enable_if_t<!__is_duration<_Rep2>::value &&
0438                             is_convertible<const _Rep2&, typename common_type<_Rep1, _Rep2>::type>::value,
0439                         int> = 0>
0440 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR duration<typename common_type<_Rep1, _Rep2>::type, _Period>
0441 operator/(const duration<_Rep1, _Period>& __d, const _Rep2& __s) {
0442   typedef typename common_type<_Rep1, _Rep2>::type _Cr;
0443   typedef duration<_Cr, _Period> _Cd;
0444   return _Cd(_Cd(__d).count() / static_cast<_Cr>(__s));
0445 }
0446
0447 template <class _Rep1, class _Period1, class _Rep2, class _Period2>
0448 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR typename common_type<_Rep1, _Rep2>::type
0449 operator/(const duration<_Rep1, _Period1>& __lhs, const duration<_Rep2, _Period2>& __rhs) {
0450   typedef typename common_type<duration<_Rep1, _Period1>, duration<_Rep2, _Period2> >::type _Ct;
0451   return _Ct(__lhs).count() / _Ct(__rhs).count();
0452 }
0453
0454 // Duration %
0455
0456 template <class _Rep1,
0457           class _Period,
0458           class _Rep2,
0459           __enable_if_t<!__is_duration<_Rep2>::value &&
0460                             is_convertible<const _Rep2&, typename common_type<_Rep1, _Rep2>::type>::value,
0461                         int> = 0>
0462 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR duration<typename common_type<_Rep1, _Rep2>::type, _Period>
0463 operator%(const duration<_Rep1, _Period>& __d, const _Rep2& __s) {
0464   typedef typename common_type<_Rep1, _Rep2>::type _Cr;
0465   typedef duration<_Cr, _Period> _Cd;
0466   return _Cd(_Cd(__d).count() % static_cast<_Cr>(__s));
0467 }
0468
0469 template <class _Rep1, class _Period1, class _Rep2, class _Period2>
0470 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR
0471 typename common_type<duration<_Rep1, _Period1>, duration<_Rep2, _Period2> >::type
0472 operator%(const duration<_Rep1, _Period1>& __lhs, const duration<_Rep2, _Period2>& __rhs) {
0473   typedef typename common_type<_Rep1, _Rep2>::type _Cr;
0474   typedef typename common_type<duration<_Rep1, _Period1>, duration<_Rep2, _Period2> >::type _Cd;
0475   return _Cd(static_cast<_Cr>(_Cd(__lhs).count()) % static_cast<_Cr>(_Cd(__rhs).count()));
0476 }
0477
0478 } // namespace chrono
0479
0480 #if _LIBCPP_STD_VER >= 14
0481 // Suffixes for duration literals [time.duration.literals]
0482 inline namespace literals {
0483 inline namespace chrono_literals {
0484
0485 _LIBCPP_HIDE_FROM_ABI constexpr chrono::hours operator""h(unsigned long long __h) {
0486   return chrono::hours(static_cast<chrono::hours::rep>(__h));
0487 }
0488
0489 _LIBCPP_HIDE_FROM_ABI constexpr chrono::duration<long double, ratio<3600, 1>> operator""h(long double __h) {
0490   return chrono::duration<long double, ratio<3600, 1>>(__h);
0491 }
0492
0493 _LIBCPP_HIDE_FROM_ABI constexpr chrono::minutes operator""min(unsigned long long __m) {
0494   return chrono::minutes(static_cast<chrono::minutes::rep>(__m));
0495 }
0496
0497 _LIBCPP_HIDE_FROM_ABI constexpr chrono::duration<long double, ratio<60, 1>> operator""min(long double __m) {
0498   return chrono::duration<long double, ratio<60, 1>>(__m);
0499 }
0500
0501 _LIBCPP_HIDE_FROM_ABI constexpr chrono::seconds operator""s(unsigned long long __s) {
0502   return chrono::seconds(static_cast<chrono::seconds::rep>(__s));
0503 }
0504
0505 _LIBCPP_HIDE_FROM_ABI constexpr chrono::duration<long double> operator""s(long double __s) {
0506   return chrono::duration<long double>(__s);
0507 }
0508
0509 _LIBCPP_HIDE_FROM_ABI constexpr chrono::milliseconds operator""ms(unsigned long long __ms) {
0510   return chrono::milliseconds(static_cast<chrono::milliseconds::rep>(__ms));
0511 }
0512
0513 _LIBCPP_HIDE_FROM_ABI constexpr chrono::duration<long double, milli> operator""ms(long double __ms) {
0514   return chrono::duration<long double, milli>(__ms);
0515 }
0516
0517 _LIBCPP_HIDE_FROM_ABI constexpr chrono::microseconds operator""us(unsigned long long __us) {
0518   return chrono::microseconds(static_cast<chrono::microseconds::rep>(__us));
0519 }
0520
0521 _LIBCPP_HIDE_FROM_ABI constexpr chrono::duration<long double, micro> operator""us(long double __us) {
0522   return chrono::duration<long double, micro>(__us);
0523 }
0524
0525 _LIBCPP_HIDE_FROM_ABI constexpr chrono::nanoseconds operator""ns(unsigned long long __ns) {
0526   return chrono::nanoseconds(static_cast<chrono::nanoseconds::rep>(__ns));
0527 }
0528
0529 _LIBCPP_HIDE_FROM_ABI constexpr chrono::duration<long double, nano> operator""ns(long double __ns) {
0530   return chrono::duration<long double, nano>(__ns);
0531 }
0532
0533 } // namespace chrono_literals
0534 } // namespace literals
0535
0536 namespace chrono { // hoist the literals into namespace std::chrono
0537 using namespace literals::chrono_literals;
0538 } // namespace chrono
0539
0540 #endif // _LIBCPP_STD_VER >= 14
0541
0542 _LIBCPP_END_NAMESPACE_STD
0543
0544 _LIBCPP_POP_MACROS
0545
0546 #if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
0547 #  include <__cxx03/type_traits>
0548 #endif
0549
0550 #endif // _LIBCPP___CXX03___CHRONO_DURATION_H