29 #ifndef _GLIBCXX_CHRONO
30 #define _GLIBCXX_CHRONO 1
32 #pragma GCC system_header
34 #if __cplusplus < 201103L
44 #ifdef _GLIBCXX_USE_C99_STDINT_TR1
46 namespace std _GLIBCXX_VISIBILITY(default)
48 _GLIBCXX_BEGIN_NAMESPACE_VERSION
63 template<
typename _Rep,
typename _Period = ratio<1>>
66 template<
typename _Clock,
typename _Dur =
typename _Clock::duration>
72 template<
typename _CT,
typename _Period1,
typename _Period2>
73 struct __duration_common_type_wrapper
76 typedef __static_gcd<_Period1::num, _Period2::num> __gcd_num;
77 typedef __static_gcd<_Period1::den, _Period2::den> __gcd_den;
78 typedef typename _CT::type __cr;
79 typedef ratio<__gcd_num::value,
80 (_Period1::den / __gcd_den::value) * _Period2::den> __r;
82 typedef __success_type<chrono::duration<__cr, __r>> type;
85 template<
typename _Period1,
typename _Period2>
86 struct __duration_common_type_wrapper<__failure_type, _Period1, _Period2>
87 {
typedef __failure_type type; };
89 template<
typename _Rep1,
typename _Period1,
typename _Rep2,
typename _Period2>
90 struct common_type<chrono::duration<_Rep1, _Period1>,
91 chrono::duration<_Rep2, _Period2>>
92 :
public __duration_common_type_wrapper<typename __member_type_wrapper<
93 common_type<_Rep1, _Rep2>>::type, _Period1, _Period2>::type
98 template<
typename _CT,
typename _Clock>
99 struct __timepoint_common_type_wrapper
101 typedef __success_type<chrono::time_point<_Clock, typename _CT::type>>
105 template<
typename _Clock>
106 struct __timepoint_common_type_wrapper<__failure_type, _Clock>
107 {
typedef __failure_type type; };
109 template<
typename _Clock,
typename _Duration1,
typename _Duration2>
110 struct common_type<chrono::time_point<_Clock, _Duration1>,
111 chrono::time_point<_Clock, _Duration2>>
112 :
public __timepoint_common_type_wrapper<typename __member_type_wrapper<
113 common_type<_Duration1, _Duration2>>::type, _Clock>::type
119 template<
typename _ToDur,
typename _CF,
typename _CR,
120 bool _NumIsOne =
false,
bool _DenIsOne =
false>
121 struct __duration_cast_impl
123 template<
typename _Rep,
typename _Period>
124 static constexpr _ToDur
125 __cast(
const duration<_Rep, _Period>& __d)
127 typedef typename _ToDur::rep __to_rep;
128 return _ToDur(static_cast<__to_rep>(static_cast<_CR>(__d.count())
129 * static_cast<_CR>(_CF::num)
130 /
static_cast<_CR
>(_CF::den)));
134 template<
typename _ToDur,
typename _CF,
typename _CR>
135 struct __duration_cast_impl<_ToDur, _CF, _CR, true, true>
137 template<
typename _Rep,
typename _Period>
138 static constexpr _ToDur
139 __cast(
const duration<_Rep, _Period>& __d)
141 typedef typename _ToDur::rep __to_rep;
142 return _ToDur(static_cast<__to_rep>(__d.count()));
146 template<
typename _ToDur,
typename _CF,
typename _CR>
147 struct __duration_cast_impl<_ToDur, _CF, _CR, true, false>
149 template<
typename _Rep,
typename _Period>
150 static constexpr _ToDur
151 __cast(
const duration<_Rep, _Period>& __d)
153 typedef typename _ToDur::rep __to_rep;
154 return _ToDur(static_cast<__to_rep>(
155 static_cast<_CR>(__d.count()) / static_cast<_CR>(_CF::den)));
159 template<
typename _ToDur,
typename _CF,
typename _CR>
160 struct __duration_cast_impl<_ToDur, _CF, _CR, false, true>
162 template<
typename _Rep,
typename _Period>
163 static constexpr _ToDur
164 __cast(
const duration<_Rep, _Period>& __d)
166 typedef typename _ToDur::rep __to_rep;
167 return _ToDur(static_cast<__to_rep>(
168 static_cast<_CR>(__d.count()) * static_cast<_CR>(_CF::num)));
172 template<
typename _Tp>
177 template<
typename _Rep,
typename _Period>
178 struct __is_duration<duration<_Rep, _Period>>
182 template<
typename _Tp>
183 using __enable_if_is_duration
184 =
typename enable_if<__is_duration<_Tp>::value, _Tp>::type;
186 template<
typename _Tp>
187 using __disable_if_is_duration
188 =
typename enable_if<!__is_duration<_Tp>::value, _Tp>::type;
191 template<
typename _ToDur,
typename _Rep,
typename _Period>
192 constexpr __enable_if_is_duration<_ToDur>
195 typedef typename _ToDur::period __to_period;
196 typedef typename _ToDur::rep __to_rep;
200 typedef __duration_cast_impl<_ToDur, __cf, __cr,
201 __cf::num == 1, __cf::den == 1> __dc;
202 return __dc::__cast(__d);
206 template<
typename _Rep>
211 #if __cplusplus > 201402L
212 template <
typename _Rep>
213 inline constexpr
bool treat_as_floating_point_v =
217 #if __cplusplus >= 201703L
218 # define __cpp_lib_chrono 201611
220 template<
typename _ToDur,
typename _Rep,
typename _Period>
221 constexpr __enable_if_is_duration<_ToDur>
226 return __to - _ToDur{1};
230 template<
typename _ToDur,
typename _Rep,
typename _Period>
231 constexpr __enable_if_is_duration<_ToDur>
232 ceil(
const duration<_Rep, _Period>& __d)
236 return __to + _ToDur{1};
240 template <
typename _ToDur,
typename _Rep,
typename _Period>
242 __and_<__is_duration<_ToDur>,
243 __not_<treat_as_floating_point<typename _ToDur::rep>>>::value,
245 round(
const duration<_Rep, _Period>& __d)
247 _ToDur __t0 = chrono::floor<_ToDur>(__d);
248 _ToDur __t1 = __t0 + _ToDur{1};
249 auto __diff0 = __d - __t0;
250 auto __diff1 = __t1 - __d;
251 if (__diff0 == __diff1)
253 if (__t0.count() & 1)
257 else if (__diff0 < __diff1)
262 template<
typename _Rep,
typename _Period>
264 enable_if_t<numeric_limits<_Rep>::is_signed, duration<_Rep, _Period>>
265 abs(duration<_Rep, _Period> __d)
267 if (__d >= __d.zero())
274 template<
typename _Rep>
277 static constexpr _Rep
281 static constexpr _Rep
285 static constexpr _Rep
290 template<
typename _Tp>
295 template<
intmax_t _Num,
intmax_t _Den>
296 struct __is_ratio<
ratio<_Num, _Den>>
301 template<
typename _Rep,
typename _Period>
305 template<
typename _Rep2>
306 using __is_float = treat_as_floating_point<_Rep2>;
309 template<
typename _Period2>
311 = __bool_constant<ratio_divide<_Period2, _Period>::den == 1>;
316 typedef _Period period;
318 static_assert(!__is_duration<_Rep>::value,
"rep cannot be a duration");
319 static_assert(__is_ratio<_Period>::value,
320 "period must be a specialization of ratio");
321 static_assert(_Period::num > 0,
"period must be positive");
324 constexpr duration() =
default;
326 duration(
const duration&) =
default;
328 template<
typename _Rep2,
typename = _Require<
329 is_convertible<_Rep2, rep>,
330 __or_<__is_float<rep>, __not_<__is_float<_Rep2>>>>>
331 constexpr
explicit duration(
const _Rep2& __rep)
332 : __r(static_cast<rep>(__rep)) { }
334 template<
typename _Rep2,
typename _Period2,
typename = _Require<
335 __or_<__is_float<rep>,
336 __and_<__is_harmonic<_Period2>,
337 __not_<__is_float<_Rep2>>>>>>
338 constexpr duration(
const duration<_Rep2, _Period2>& __d)
341 ~duration() =
default;
342 duration& operator=(
const duration&) =
default;
356 {
return duration(-__r); }
358 _GLIBCXX17_CONSTEXPR duration&
365 _GLIBCXX17_CONSTEXPR duration
367 {
return duration(__r++); }
369 _GLIBCXX17_CONSTEXPR duration&
376 _GLIBCXX17_CONSTEXPR duration
378 {
return duration(__r--); }
380 _GLIBCXX17_CONSTEXPR duration&
381 operator+=(
const duration& __d)
387 _GLIBCXX17_CONSTEXPR duration&
388 operator-=(
const duration& __d)
394 _GLIBCXX17_CONSTEXPR duration&
395 operator*=(
const rep& __rhs)
401 _GLIBCXX17_CONSTEXPR duration&
402 operator/=(
const rep& __rhs)
409 template<
typename _Rep2 = rep>
411 typename enable_if<!treat_as_floating_point<_Rep2>::value,
413 operator%=(
const rep& __rhs)
419 template<
typename _Rep2 = rep>
421 typename enable_if<!treat_as_floating_point<_Rep2>::value,
423 operator%=(
const duration& __d)
430 static constexpr duration
432 {
return duration(duration_values<rep>::zero()); }
434 static constexpr duration
438 static constexpr duration
446 template<
typename _Rep1,
typename _Period1,
447 typename _Rep2,
typename _Period2>
448 constexpr
typename common_type<duration<_Rep1, _Period1>,
449 duration<_Rep2, _Period2>>::type
450 operator+(
const duration<_Rep1, _Period1>& __lhs,
451 const duration<_Rep2, _Period2>& __rhs)
453 typedef duration<_Rep1, _Period1> __dur1;
454 typedef duration<_Rep2, _Period2> __dur2;
455 typedef typename common_type<__dur1,__dur2>::type __cd;
456 return __cd(__cd(__lhs).count() + __cd(__rhs).count());
459 template<
typename _Rep1,
typename _Period1,
460 typename _Rep2,
typename _Period2>
461 constexpr
typename common_type<duration<_Rep1, _Period1>,
462 duration<_Rep2, _Period2>>::type
463 operator-(
const duration<_Rep1, _Period1>& __lhs,
464 const duration<_Rep2, _Period2>& __rhs)
466 typedef duration<_Rep1, _Period1> __dur1;
467 typedef duration<_Rep2, _Period2> __dur2;
468 typedef typename common_type<__dur1,__dur2>::type __cd;
469 return __cd(__cd(__lhs).count() - __cd(__rhs).count());
474 template<
typename _Rep1,
typename _Rep2,
475 typename _CRep =
typename common_type<_Rep1, _Rep2>::type>
477 =
typename enable_if<is_convertible<_Rep2, _CRep>::value, _CRep>::type;
479 template<
typename _Rep1,
typename _Period,
typename _Rep2>
480 constexpr duration<__common_rep_t<_Rep1, _Rep2>, _Period>
481 operator*(
const duration<_Rep1, _Period>& __d,
const _Rep2& __s)
483 typedef duration<typename common_type<_Rep1, _Rep2>::type, _Period>
485 return __cd(__cd(__d).count() * __s);
488 template<
typename _Rep1,
typename _Rep2,
typename _Period>
489 constexpr duration<__common_rep_t<_Rep2, _Rep1>, _Period>
490 operator*(
const _Rep1& __s,
const duration<_Rep2, _Period>& __d)
491 {
return __d * __s; }
493 template<
typename _Rep1,
typename _Period,
typename _Rep2>
495 duration<__common_rep_t<_Rep1, __disable_if_is_duration<_Rep2>>, _Period>
496 operator/(
const duration<_Rep1, _Period>& __d,
const _Rep2& __s)
498 typedef duration<typename common_type<_Rep1, _Rep2>::type, _Period>
500 return __cd(__cd(__d).count() / __s);
503 template<
typename _Rep1,
typename _Period1,
504 typename _Rep2,
typename _Period2>
505 constexpr
typename common_type<_Rep1, _Rep2>::type
506 operator/(
const duration<_Rep1, _Period1>& __lhs,
507 const duration<_Rep2, _Period2>& __rhs)
509 typedef duration<_Rep1, _Period1> __dur1;
510 typedef duration<_Rep2, _Period2> __dur2;
511 typedef typename common_type<__dur1,__dur2>::type __cd;
512 return __cd(__lhs).count() / __cd(__rhs).count();
516 template<
typename _Rep1,
typename _Period,
typename _Rep2>
518 duration<__common_rep_t<_Rep1, __disable_if_is_duration<_Rep2>>, _Period>
519 operator%(
const duration<_Rep1, _Period>& __d,
const _Rep2& __s)
521 typedef duration<typename common_type<_Rep1, _Rep2>::type, _Period>
523 return __cd(__cd(__d).count() % __s);
526 template<
typename _Rep1,
typename _Period1,
527 typename _Rep2,
typename _Period2>
528 constexpr
typename common_type<duration<_Rep1, _Period1>,
529 duration<_Rep2, _Period2>>::type
530 operator%(
const duration<_Rep1, _Period1>& __lhs,
531 const duration<_Rep2, _Period2>& __rhs)
533 typedef duration<_Rep1, _Period1> __dur1;
534 typedef duration<_Rep2, _Period2> __dur2;
535 typedef typename common_type<__dur1,__dur2>::type __cd;
536 return __cd(__cd(__lhs).count() % __cd(__rhs).count());
540 template<
typename _Rep1,
typename _Period1,
541 typename _Rep2,
typename _Period2>
543 operator==(
const duration<_Rep1, _Period1>& __lhs,
544 const duration<_Rep2, _Period2>& __rhs)
546 typedef duration<_Rep1, _Period1> __dur1;
547 typedef duration<_Rep2, _Period2> __dur2;
548 typedef typename common_type<__dur1,__dur2>::type __ct;
549 return __ct(__lhs).count() == __ct(__rhs).count();
552 template<
typename _Rep1,
typename _Period1,
553 typename _Rep2,
typename _Period2>
555 operator<(const duration<_Rep1, _Period1>& __lhs,
556 const duration<_Rep2, _Period2>& __rhs)
558 typedef duration<_Rep1, _Period1> __dur1;
559 typedef duration<_Rep2, _Period2> __dur2;
560 typedef typename common_type<__dur1,__dur2>::type __ct;
561 return __ct(__lhs).count() < __ct(__rhs).count();
564 template<
typename _Rep1,
typename _Period1,
565 typename _Rep2,
typename _Period2>
567 operator!=(
const duration<_Rep1, _Period1>& __lhs,
568 const duration<_Rep2, _Period2>& __rhs)
569 {
return !(__lhs == __rhs); }
571 template<
typename _Rep1,
typename _Period1,
572 typename _Rep2,
typename _Period2>
574 operator<=(const duration<_Rep1, _Period1>& __lhs,
575 const duration<_Rep2, _Period2>& __rhs)
576 {
return !(__rhs < __lhs); }
578 template<
typename _Rep1,
typename _Period1,
579 typename _Rep2,
typename _Period2>
581 operator>(
const duration<_Rep1, _Period1>& __lhs,
582 const duration<_Rep2, _Period2>& __rhs)
583 {
return __rhs < __lhs; }
585 template<
typename _Rep1,
typename _Period1,
586 typename _Rep2,
typename _Period2>
588 operator>=(
const duration<_Rep1, _Period1>& __lhs,
589 const duration<_Rep2, _Period2>& __rhs)
590 {
return !(__lhs < __rhs); }
611 template<
typename _Clock,
typename _Dur>
614 typedef _Clock clock;
616 typedef typename duration::rep rep;
617 typedef typename duration::period period;
619 constexpr
time_point() : __d(duration::zero())
622 constexpr
explicit time_point(
const duration& __dur)
627 template<
typename _Dur2,
628 typename = _Require<is_convertible<_Dur2, _Dur>>>
630 : __d(__t.time_since_epoch())
635 time_since_epoch()
const
639 _GLIBCXX17_CONSTEXPR time_point&
646 _GLIBCXX17_CONSTEXPR time_point&
654 static constexpr time_point
656 {
return time_point(duration::min()); }
658 static constexpr time_point
660 {
return time_point(duration::max()); }
667 template<
typename _ToDur,
typename _Clock,
typename _Dur>
669 time_point<_Clock, _ToDur>>::type
673 return __time_point(duration_cast<_ToDur>(__t.time_since_epoch()));
676 #if __cplusplus > 201402L
677 template<
typename _ToDur,
typename _Clock,
typename _Dur>
680 floor(
const time_point<_Clock, _Dur>& __tp)
682 return time_point<_Clock, _ToDur>{
683 chrono::floor<_ToDur>(__tp.time_since_epoch())};
686 template<
typename _ToDur,
typename _Clock,
typename _Dur>
688 enable_if_t<__is_duration<_ToDur>::value, time_point<_Clock, _ToDur>>
689 ceil(
const time_point<_Clock, _Dur>& __tp)
691 return time_point<_Clock, _ToDur>{
692 chrono::ceil<_ToDur>(__tp.time_since_epoch())};
695 template<
typename _ToDur,
typename _Clock,
typename _Dur>
697 __and_<__is_duration<_ToDur>,
698 __not_<treat_as_floating_point<typename _ToDur::rep>>>::value,
699 time_point<_Clock, _ToDur>>
700 round(
const time_point<_Clock, _Dur>& __tp)
702 return time_point<_Clock, _ToDur>{
703 chrono::round<_ToDur>(__tp.time_since_epoch())};
707 template<
typename _Clock,
typename _Dur1,
708 typename _Rep2,
typename _Period2>
709 constexpr time_point<_Clock,
710 typename common_type<_Dur1, duration<_Rep2, _Period2>>::type>
711 operator+(
const time_point<_Clock, _Dur1>& __lhs,
712 const duration<_Rep2, _Period2>& __rhs)
714 typedef duration<_Rep2, _Period2> __dur2;
715 typedef typename common_type<_Dur1,__dur2>::type __ct;
716 typedef time_point<_Clock, __ct> __time_point;
717 return __time_point(__lhs.time_since_epoch() + __rhs);
720 template<
typename _Rep1,
typename _Period1,
721 typename _Clock,
typename _Dur2>
722 constexpr time_point<_Clock,
723 typename common_type<duration<_Rep1, _Period1>, _Dur2>::type>
724 operator+(
const duration<_Rep1, _Period1>& __lhs,
725 const time_point<_Clock, _Dur2>& __rhs)
727 typedef duration<_Rep1, _Period1> __dur1;
728 typedef typename common_type<__dur1,_Dur2>::type __ct;
729 typedef time_point<_Clock, __ct> __time_point;
730 return __time_point(__rhs.time_since_epoch() + __lhs);
733 template<
typename _Clock,
typename _Dur1,
734 typename _Rep2,
typename _Period2>
735 constexpr time_point<_Clock,
736 typename common_type<_Dur1, duration<_Rep2, _Period2>>::type>
737 operator-(
const time_point<_Clock, _Dur1>& __lhs,
738 const duration<_Rep2, _Period2>& __rhs)
740 typedef duration<_Rep2, _Period2> __dur2;
741 typedef typename common_type<_Dur1,__dur2>::type __ct;
742 typedef time_point<_Clock, __ct> __time_point;
743 return __time_point(__lhs.time_since_epoch() -__rhs);
746 template<
typename _Clock,
typename _Dur1,
typename _Dur2>
747 constexpr
typename common_type<_Dur1, _Dur2>::type
748 operator-(
const time_point<_Clock, _Dur1>& __lhs,
749 const time_point<_Clock, _Dur2>& __rhs)
750 {
return __lhs.time_since_epoch() - __rhs.time_since_epoch(); }
752 template<
typename _Clock,
typename _Dur1,
typename _Dur2>
754 operator==(
const time_point<_Clock, _Dur1>& __lhs,
755 const time_point<_Clock, _Dur2>& __rhs)
756 {
return __lhs.time_since_epoch() == __rhs.time_since_epoch(); }
758 template<
typename _Clock,
typename _Dur1,
typename _Dur2>
760 operator!=(
const time_point<_Clock, _Dur1>& __lhs,
761 const time_point<_Clock, _Dur2>& __rhs)
762 {
return !(__lhs == __rhs); }
764 template<
typename _Clock,
typename _Dur1,
typename _Dur2>
766 operator<(const time_point<_Clock, _Dur1>& __lhs,
767 const time_point<_Clock, _Dur2>& __rhs)
768 {
return __lhs.time_since_epoch() < __rhs.time_since_epoch(); }
770 template<
typename _Clock,
typename _Dur1,
typename _Dur2>
772 operator<=(const time_point<_Clock, _Dur1>& __lhs,
773 const time_point<_Clock, _Dur2>& __rhs)
774 {
return !(__rhs < __lhs); }
776 template<
typename _Clock,
typename _Dur1,
typename _Dur2>
778 operator>(
const time_point<_Clock, _Dur1>& __lhs,
779 const time_point<_Clock, _Dur2>& __rhs)
780 {
return __rhs < __lhs; }
782 template<
typename _Clock,
typename _Dur1,
typename _Dur2>
784 operator>=(
const time_point<_Clock, _Dur1>& __lhs,
785 const time_point<_Clock, _Dur2>& __rhs)
786 {
return !(__lhs < __rhs); }
807 inline namespace _V2 {
817 typedef duration::rep rep;
818 typedef duration::period period;
821 static_assert(system_clock::duration::min()
822 < system_clock::duration::zero(),
823 "a clock's minimum duration cannot be less than its epoch");
825 static constexpr
bool is_steady =
false;
834 return std::time_t(duration_cast<chrono::seconds>
835 (__t.time_since_epoch()).count());
839 from_time_t(std::time_t __t)
noexcept
856 typedef duration::rep rep;
857 typedef duration::period period;
860 static constexpr
bool is_steady =
true;
879 #if __cplusplus > 201103L
881 #define __cpp_lib_chrono_udls 201304
883 inline namespace literals
885 inline namespace chrono_literals
887 #pragma GCC diagnostic push
888 #pragma GCC diagnostic ignored "-Wliteral-suffix"
889 template<
typename _Rep,
unsigned long long _Val>
890 struct _Checked_integral_constant
893 static_assert(_Checked_integral_constant::value >= 0
894 && _Checked_integral_constant::value == _Val,
895 "literal value cannot be represented by duration type");
898 template<
typename _Dur,
char... _Digits>
899 constexpr _Dur __check_overflow()
901 using _Val = __parse_int::_Parse_int<_Digits...>;
902 using _Rep =
typename _Dur::rep;
905 using _CheckedVal = _Checked_integral_constant<_Rep, _Val::value>;
906 return _Dur{_CheckedVal::value};
909 constexpr chrono::duration<long double, ratio<3600,1>>
910 operator""h(
long double __hours)
911 {
return chrono::duration<long double, ratio<3600,1>>{__hours}; }
913 template <
char... _Digits>
918 constexpr chrono::duration<long double, ratio<60,1>>
919 operator""min(
long double __mins)
920 {
return chrono::duration<long double, ratio<60,1>>{__mins}; }
922 template <
char... _Digits>
927 constexpr chrono::duration<long double>
928 operator""s(
long double __secs)
929 {
return chrono::duration<long double>{__secs}; }
931 template <
char... _Digits>
936 constexpr chrono::duration<long double, milli>
937 operator""ms(
long double __msecs)
938 {
return chrono::duration<long double, milli>{__msecs}; }
940 template <
char... _Digits>
945 constexpr chrono::duration<long double, micro>
946 operator""us(
long double __usecs)
947 {
return chrono::duration<long double, micro>{__usecs}; }
949 template <
char... _Digits>
954 constexpr chrono::duration<long double, nano>
955 operator""ns(
long double __nsecs)
956 {
return chrono::duration<long double, nano>{__nsecs}; }
958 template <
char... _Digits>
963 #pragma GCC diagnostic pop
969 using namespace literals::chrono_literals;
976 _GLIBCXX_END_NAMESPACE_VERSION
979 #endif //_GLIBCXX_USE_C99_STDINT_TR1
983 #endif //_GLIBCXX_CHRONO
duration< int64_t, milli > milliseconds
milliseconds
Provides compile-time rational arithmetic.
enable_if< ::__array_traits< _Tp, _Nm >::_Is_swappable::value >::type noexcept(noexcept(__one.swap(__two)))
swap
duration< int64_t, ratio< 60 > > minutes
minutes
duration< int64_t, micro > microseconds
microseconds
typename __ratio_divide< _R1, _R2 >::type ratio_divide
ratio_divide
Define a member typedef type only if a boolean constant is true.
static constexpr _Tp max() noexcept
duration< int64_t, ratio< 3600 > > hours
hours
typename enable_if< _Cond, _Tp >::type enable_if_t
Alias template for enable_if.
constexpr enable_if< __is_duration< _ToDur >::value, time_point< _Clock, _ToDur > >::type time_point_cast(const time_point< _Clock, _Dur > &__t)
time_point_cast
constexpr __enable_if_is_duration< _ToDur > duration_cast(const duration< _Rep, _Period > &__d)
duration_cast
_GLIBCXX14_CONSTEXPR const _Tp & max(const _Tp &, const _Tp &)
This does what you think it does.
duration< int64_t > seconds
seconds
duration< int64_t, nano > nanoseconds
nanoseconds
_GLIBCXX14_CONSTEXPR const _Tp & min(const _Tp &, const _Tp &)
This does what you think it does.
_Tp abs(const complex< _Tp > &)
Return magnitude of z.
static constexpr _Tp lowest() noexcept