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// -*- C++ -*-
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//===---------------------------- chrono ----------------------------------===//
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//
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//                     The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP_CHRONO
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#define _LIBCPP_CHRONO
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/*
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    chrono synopsis
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namespace std
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{
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namespace chrono
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{
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template <class ToDuration, class Rep, class Period>
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constexpr
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ToDuration
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duration_cast(const duration<Rep, Period>& fd);
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template <class Rep> struct treat_as_floating_point : is_floating_point<Rep> {};
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template <class Rep>
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struct duration_values
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{
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public:
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    static constexpr Rep zero();
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    static constexpr Rep max();
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    static constexpr Rep min();
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};
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// duration
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template <class Rep, class Period = ratio<1>>
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class duration
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{
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    static_assert(!__is_duration<Rep>::value, "A duration representation can not be a duration");
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    static_assert(__is_ratio<Period>::value, "Second template parameter of duration must be a std::ratio");
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    static_assert(Period::num > 0, "duration period must be positive");
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public:
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    typedef Rep rep;
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    typedef Period period;
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    constexpr duration() = default;
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    template <class Rep2>
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        constexpr explicit duration(const Rep2& r,
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            typename enable_if
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            <
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               is_convertible<Rep2, rep>::value &&
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               (treat_as_floating_point<rep>::value ||
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               !treat_as_floating_point<rep>::value && !treat_as_floating_point<Rep2>::value)
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            >::type* = 0);
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    // conversions
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    template <class Rep2, class Period2>
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        constexpr duration(const duration<Rep2, Period2>& d,
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            typename enable_if
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            <
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                treat_as_floating_point<rep>::value ||
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                ratio_divide<Period2, period>::type::den == 1
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            >::type* = 0);
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    // observer
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    constexpr rep count() const;
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    // arithmetic
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    constexpr duration  operator+() const;
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    constexpr duration  operator-() const;
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    duration& operator++();
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    duration  operator++(int);
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    duration& operator--();
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    duration  operator--(int);
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    duration& operator+=(const duration& d);
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    duration& operator-=(const duration& d);
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    duration& operator*=(const rep& rhs);
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    duration& operator/=(const rep& rhs);
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    // special values
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    static constexpr duration zero();
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    static constexpr duration min();
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    static constexpr duration max();
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};
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typedef duration<long long,         nano> nanoseconds;
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typedef duration<long long,        micro> microseconds;
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typedef duration<long long,        milli> milliseconds;
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typedef duration<long long              > seconds;
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typedef duration<     long, ratio<  60> > minutes;
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typedef duration<     long, ratio<3600> > hours;
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template <class Clock, class Duration = typename Clock::duration>
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class time_point
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{
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public:
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    typedef Clock                     clock;
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    typedef Duration                  duration;
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    typedef typename duration::rep    rep;
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    typedef typename duration::period period;
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private:
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    duration d_;  // exposition only
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public:
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    time_point();  // has value "epoch" // constexpr in C++14
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    explicit time_point(const duration& d);  // same as time_point() + d // constexpr in C++14
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    // conversions
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    template <class Duration2>
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       time_point(const time_point<clock, Duration2>& t); // constexpr in C++14
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    // observer
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    duration time_since_epoch() const; // constexpr in C++14
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    // arithmetic
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    time_point& operator+=(const duration& d);
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    time_point& operator-=(const duration& d);
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    // special values
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    static constexpr time_point min();
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    static constexpr time_point max();
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};
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} // chrono
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// common_type traits
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template <class Rep1, class Period1, class Rep2, class Period2>
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  struct common_type<chrono::duration<Rep1, Period1>, chrono::duration<Rep2, Period2>>;
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template <class Clock, class Duration1, class Duration2>
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  struct common_type<chrono::time_point<Clock, Duration1>, chrono::time_point<Clock, Duration2>>;
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namespace chrono {
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// duration arithmetic
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template <class Rep1, class Period1, class Rep2, class Period2>
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  constexpr
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  typename common_type<duration<Rep1, Period1>, duration<Rep2, Period2>>::type
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  operator+(const duration<Rep1, Period1>& lhs, const duration<Rep2, Period2>& rhs);
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template <class Rep1, class Period1, class Rep2, class Period2>
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  constexpr
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  typename common_type<duration<Rep1, Period1>, duration<Rep2, Period2>>::type
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  operator-(const duration<Rep1, Period1>& lhs, const duration<Rep2, Period2>& rhs);
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template <class Rep1, class Period, class Rep2>
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  constexpr
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  duration<typename common_type<Rep1, Rep2>::type, Period>
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  operator*(const duration<Rep1, Period>& d, const Rep2& s);
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template <class Rep1, class Period, class Rep2>
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  constexpr
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  duration<typename common_type<Rep1, Rep2>::type, Period>
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  operator*(const Rep1& s, const duration<Rep2, Period>& d);
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template <class Rep1, class Period, class Rep2>
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  constexpr
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  duration<typename common_type<Rep1, Rep2>::type, Period>
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  operator/(const duration<Rep1, Period>& d, const Rep2& s);
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template <class Rep1, class Period1, class Rep2, class Period2>
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  constexpr
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  typename common_type<Rep1, Rep2>::type
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  operator/(const duration<Rep1, Period1>& lhs, const duration<Rep2, Period2>& rhs);
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// duration comparisons
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template <class Rep1, class Period1, class Rep2, class Period2>
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   constexpr
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   bool operator==(const duration<Rep1, Period1>& lhs, const duration<Rep2, Period2>& rhs);
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template <class Rep1, class Period1, class Rep2, class Period2>
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   constexpr
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   bool operator!=(const duration<Rep1, Period1>& lhs, const duration<Rep2, Period2>& rhs);
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template <class Rep1, class Period1, class Rep2, class Period2>
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   constexpr
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   bool operator< (const duration<Rep1, Period1>& lhs, const duration<Rep2, Period2>& rhs);
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template <class Rep1, class Period1, class Rep2, class Period2>
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   constexpr
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   bool operator<=(const duration<Rep1, Period1>& lhs, const duration<Rep2, Period2>& rhs);
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template <class Rep1, class Period1, class Rep2, class Period2>
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   constexpr
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   bool operator> (const duration<Rep1, Period1>& lhs, const duration<Rep2, Period2>& rhs);
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template <class Rep1, class Period1, class Rep2, class Period2>
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   constexpr
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   bool operator>=(const duration<Rep1, Period1>& lhs, const duration<Rep2, Period2>& rhs);
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// duration_cast
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template <class ToDuration, class Rep, class Period>
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  ToDuration duration_cast(const duration<Rep, Period>& d);
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// time_point arithmetic (all constexpr in C++14)
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template <class Clock, class Duration1, class Rep2, class Period2>
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  time_point<Clock, typename common_type<Duration1, duration<Rep2, Period2>>::type>
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  operator+(const time_point<Clock, Duration1>& lhs, const duration<Rep2, Period2>& rhs);
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template <class Rep1, class Period1, class Clock, class Duration2>
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  time_point<Clock, typename common_type<duration<Rep1, Period1>, Duration2>::type>
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  operator+(const duration<Rep1, Period1>& lhs, const time_point<Clock, Duration2>& rhs);
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template <class Clock, class Duration1, class Rep2, class Period2>
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  time_point<Clock, typename common_type<Duration1, duration<Rep2, Period2>>::type>
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  operator-(const time_point<Clock, Duration1>& lhs, const duration<Rep2, Period2>& rhs);
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template <class Clock, class Duration1, class Duration2>
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  typename common_type<Duration1, Duration2>::type
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  operator-(const time_point<Clock, Duration1>& lhs, const time_point<Clock, Duration2>& rhs);
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// time_point comparisons (all constexpr in C++14)
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template <class Clock, class Duration1, class Duration2>
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   bool operator==(const time_point<Clock, Duration1>& lhs, const time_point<Clock, Duration2>& rhs);
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template <class Clock, class Duration1, class Duration2>
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   bool operator!=(const time_point<Clock, Duration1>& lhs, const time_point<Clock, Duration2>& rhs);
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template <class Clock, class Duration1, class Duration2>
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   bool operator< (const time_point<Clock, Duration1>& lhs, const time_point<Clock, Duration2>& rhs);
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template <class Clock, class Duration1, class Duration2>
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   bool operator<=(const time_point<Clock, Duration1>& lhs, const time_point<Clock, Duration2>& rhs);
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template <class Clock, class Duration1, class Duration2>
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   bool operator> (const time_point<Clock, Duration1>& lhs, const time_point<Clock, Duration2>& rhs);
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template <class Clock, class Duration1, class Duration2>
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   bool operator>=(const time_point<Clock, Duration1>& lhs, const time_point<Clock, Duration2>& rhs);
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// time_point_cast (constexpr in C++14)
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template <class ToDuration, class Clock, class Duration>
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  time_point<Clock, ToDuration> time_point_cast(const time_point<Clock, Duration>& t);
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// Clocks
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class system_clock
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{
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public:
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    typedef microseconds                     duration;
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    typedef duration::rep                    rep;
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    typedef duration::period                 period;
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    typedef chrono::time_point<system_clock> time_point;
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    static const bool is_steady =            false; // constexpr in C++14
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    static time_point now() noexcept;
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    static time_t     to_time_t  (const time_point& __t) noexcept;
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    static time_point from_time_t(time_t __t) noexcept;
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};
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class steady_clock
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{
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public:
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    typedef nanoseconds                                   duration;
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    typedef duration::rep                                 rep;
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    typedef duration::period                              period;
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    typedef chrono::time_point<steady_clock, duration>    time_point;
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    static const bool is_steady =                         true; // constexpr in C++14
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    static time_point now() noexcept;
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};
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typedef steady_clock high_resolution_clock;
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}  // chrono
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constexpr chrono::hours                                 operator "" h(unsigned long long); // C++14
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constexpr chrono::duration<unspecified , ratio<3600,1>> operator "" h(long double); // C++14
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constexpr chrono::minutes                               operator "" min(unsigned long long); // C++14
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constexpr chrono::duration<unspecified , ratio<60,1>>   operator "" min(long double); // C++14
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constexpr chrono::seconds                               operator "" s(unsigned long long); // C++14
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constexpr chrono::duration<unspecified >                operator "" s(long double); // C++14
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constexpr chrono::milliseconds                          operator "" ms(unsigned long long); // C++14
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constexpr chrono::duration<unspecified , milli>         operator "" ms(long double); // C++14
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constexpr chrono::microseconds                          operator "" us(unsigned long long); // C++14
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constexpr chrono::duration<unspecified , micro>         operator "" us(long double); // C++14
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constexpr chrono::nanoseconds                           operator "" ns(unsigned long long); // C++14
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constexpr chrono::duration<unspecified , nano>          operator "" ns(long double); // C++14
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}  // std
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*/
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#include <__config>
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#include <ctime>
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#include <type_traits>
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#include <ratio>
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#include <limits>
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#include <__undef_min_max>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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#pragma GCC system_header
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#endif
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_LIBCPP_BEGIN_NAMESPACE_STD
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namespace chrono
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{
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template <class _Rep, class _Period = ratio<1> > class _LIBCPP_TYPE_VIS_ONLY duration;
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template <class _Tp>
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struct __is_duration : false_type {};
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template <class _Rep, class _Period>
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struct __is_duration<duration<_Rep, _Period> > : true_type  {};
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template <class _Rep, class _Period>
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struct __is_duration<const duration<_Rep, _Period> > : true_type  {};
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template <class _Rep, class _Period>
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struct __is_duration<volatile duration<_Rep, _Period> > : true_type  {};
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template <class _Rep, class _Period>
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struct __is_duration<const volatile duration<_Rep, _Period> > : true_type  {};
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} // chrono
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template <class _Rep1, class _Period1, class _Rep2, class _Period2>
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struct _LIBCPP_TYPE_VIS_ONLY common_type<chrono::duration<_Rep1, _Period1>,
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                                         chrono::duration<_Rep2, _Period2> >
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{
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    typedef chrono::duration<typename common_type<_Rep1, _Rep2>::type,
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                             typename __ratio_gcd<_Period1, _Period2>::type> type;
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};
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namespace chrono {
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// duration_cast
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template <class _FromDuration, class _ToDuration,
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          class _Period = typename ratio_divide<typename _FromDuration::period, typename _ToDuration::period>::type,
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          bool = _Period::num == 1,
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          bool = _Period::den == 1>
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struct __duration_cast;
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template <class _FromDuration, class _ToDuration, class _Period>
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struct __duration_cast<_FromDuration, _ToDuration, _Period, true, true>
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{
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    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
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    _ToDuration operator()(const _FromDuration& __fd) const
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    {
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        return _ToDuration(static_cast<typename _ToDuration::rep>(__fd.count()));
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    }
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};
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template <class _FromDuration, class _ToDuration, class _Period>
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struct __duration_cast<_FromDuration, _ToDuration, _Period, true, false>
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{
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    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
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    _ToDuration operator()(const _FromDuration& __fd) const
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    {
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        typedef typename common_type<typename _ToDuration::rep, typename _FromDuration::rep, intmax_t>::type _Ct;
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        return _ToDuration(static_cast<typename _ToDuration::rep>(
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                           static_cast<_Ct>(__fd.count()) / static_cast<_Ct>(_Period::den)));
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    }
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};
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template <class _FromDuration, class _ToDuration, class _Period>
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struct __duration_cast<_FromDuration, _ToDuration, _Period, false, true>
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{
357
    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
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    _ToDuration operator()(const _FromDuration& __fd) const
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    {
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        typedef typename common_type<typename _ToDuration::rep, typename _FromDuration::rep, intmax_t>::type _Ct;
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        return _ToDuration(static_cast<typename _ToDuration::rep>(
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                           static_cast<_Ct>(__fd.count()) * static_cast<_Ct>(_Period::num)));
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    }
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};
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template <class _FromDuration, class _ToDuration, class _Period>
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struct __duration_cast<_FromDuration, _ToDuration, _Period, false, false>
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{
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    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
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    _ToDuration operator()(const _FromDuration& __fd) const
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    {
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        typedef typename common_type<typename _ToDuration::rep, typename _FromDuration::rep, intmax_t>::type _Ct;
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        return _ToDuration(static_cast<typename _ToDuration::rep>(
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                           static_cast<_Ct>(__fd.count()) * static_cast<_Ct>(_Period::num)
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                                                          / static_cast<_Ct>(_Period::den)));
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    }
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};
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template <class _ToDuration, class _Rep, class _Period>
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inline _LIBCPP_INLINE_VISIBILITY
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_LIBCPP_CONSTEXPR
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typename enable_if
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<
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    __is_duration<_ToDuration>::value,
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    _ToDuration
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>::type
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duration_cast(const duration<_Rep, _Period>& __fd)
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{
389
    return __duration_cast<duration<_Rep, _Period>, _ToDuration>()(__fd);
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}
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template <class _Rep>
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struct _LIBCPP_TYPE_VIS_ONLY treat_as_floating_point : is_floating_point<_Rep> {};
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template <class _Rep>
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struct _LIBCPP_TYPE_VIS_ONLY duration_values
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{
398
public:
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    _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR _Rep zero() {return _Rep(0);}
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    _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR _Rep max()  {return numeric_limits<_Rep>::max();}
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    _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR _Rep min()  {return numeric_limits<_Rep>::lowest();}
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};
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// duration
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template <class _Rep, class _Period>
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class _LIBCPP_TYPE_VIS_ONLY duration
408
{
409
    static_assert(!__is_duration<_Rep>::value, "A duration representation can not be a duration");
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    static_assert(__is_ratio<_Period>::value, "Second template parameter of duration must be a std::ratio");
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    static_assert(_Period::num > 0, "duration period must be positive");
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    template <class _R1, class _R2>
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    struct __no_overflow
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    {
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    private:
417
        static const intmax_t __gcd_n1_n2 = __static_gcd<_R1::num, _R2::num>::value;
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        static const intmax_t __gcd_d1_d2 = __static_gcd<_R1::den, _R2::den>::value;
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        static const intmax_t __n1 = _R1::num / __gcd_n1_n2;
420
        static const intmax_t __d1 = _R1::den / __gcd_d1_d2;
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        static const intmax_t __n2 = _R2::num / __gcd_n1_n2;
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        static const intmax_t __d2 = _R2::den / __gcd_d1_d2;
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        static const intmax_t max = -((intmax_t(1) << (sizeof(intmax_t) * CHAR_BIT - 1)) + 1);
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425
        template <intmax_t _Xp, intmax_t _Yp, bool __overflow>
426
        struct __mul    // __overflow == false
427
        {
428
            static const intmax_t value = _Xp * _Yp;
429
        };
430
431
        template <intmax_t _Xp, intmax_t _Yp>
432
        struct __mul<_Xp, _Yp, true>
433
        {
434
            static const intmax_t value = 1;
435
        };
436
437
    public:
438
        static const bool value = (__n1 <= max / __d2) && (__n2 <= max / __d1);
439
        typedef ratio<__mul<__n1, __d2, !value>::value,
440
                      __mul<__n2, __d1, !value>::value> type;
441
    };
442
443
public:
444
    typedef _Rep rep;
445
    typedef _Period period;
446
private:
447
    rep __rep_;
448
public:
449
450
    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
451
#ifndef _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS
452
        duration() = default;
453
#else
454
        duration() {}
455
#endif
456
457
    template <class _Rep2>
458
        _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
459
        explicit duration(const _Rep2& __r,
460
            typename enable_if
461
            <
462
               is_convertible<_Rep2, rep>::value &&
463
               (treat_as_floating_point<rep>::value ||
464
               !treat_as_floating_point<_Rep2>::value)
465
            >::type* = 0)
466
                : __rep_(__r) {}
467
468
    // conversions
469
    template <class _Rep2, class _Period2>
470
        _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
471
        duration(const duration<_Rep2, _Period2>& __d,
472
            typename enable_if
473
            <
474
                __no_overflow<_Period2, period>::value && (
475
                treat_as_floating_point<rep>::value ||
476
                (__no_overflow<_Period2, period>::type::den == 1 &&
477
                 !treat_as_floating_point<_Rep2>::value))
478
            >::type* = 0)
479
                : __rep_(_VSTD::chrono::duration_cast<duration>(__d).count()) {}
480
481
    // observer
482
483
    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR rep count() const {return __rep_;}
484
485
    // arithmetic
486
487
    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR duration  operator+() const {return *this;}
488
    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR duration  operator-() const {return duration(-__rep_);}
489
    _LIBCPP_INLINE_VISIBILITY duration& operator++()      {++__rep_; return *this;}
490
    _LIBCPP_INLINE_VISIBILITY duration  operator++(int)   {return duration(__rep_++);}
491
    _LIBCPP_INLINE_VISIBILITY duration& operator--()      {--__rep_; return *this;}
492
    _LIBCPP_INLINE_VISIBILITY duration  operator--(int)   {return duration(__rep_--);}
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    _LIBCPP_INLINE_VISIBILITY duration& operator+=(const duration& __d) {__rep_ += __d.count(); return *this;}
495
    _LIBCPP_INLINE_VISIBILITY duration& operator-=(const duration& __d) {__rep_ -= __d.count(); return *this;}
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    _LIBCPP_INLINE_VISIBILITY duration& operator*=(const rep& rhs) {__rep_ *= rhs; return *this;}
498
    _LIBCPP_INLINE_VISIBILITY duration& operator/=(const rep& rhs) {__rep_ /= rhs; return *this;}
499
    _LIBCPP_INLINE_VISIBILITY duration& operator%=(const rep& rhs) {__rep_ %= rhs; return *this;}
500
    _LIBCPP_INLINE_VISIBILITY duration& operator%=(const duration& rhs) {__rep_ %= rhs.count(); return *this;}
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    // special values
503
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    _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR duration zero() {return duration(duration_values<rep>::zero());}
505
    _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR duration min()  {return duration(duration_values<rep>::min());}
506
    _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR duration max()  {return duration(duration_values<rep>::max());}
507
};
508
509
typedef duration<long long,         nano> nanoseconds;
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typedef duration<long long,        micro> microseconds;
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typedef duration<long long,        milli> milliseconds;
512
typedef duration<long long              > seconds;
513
typedef duration<     long, ratio<  60> > minutes;
514
typedef duration<     long, ratio<3600> > hours;
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// Duration ==
517
518
template <class _LhsDuration, class _RhsDuration>
519
struct __duration_eq
520
{
521
    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
522
    bool operator()(const _LhsDuration& __lhs, const _RhsDuration& __rhs) const
523
        {
524
            typedef typename common_type<_LhsDuration, _RhsDuration>::type _Ct;
525
            return _Ct(__lhs).count() == _Ct(__rhs).count();
526
        }
527
};
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529
template <class _LhsDuration>
530
struct __duration_eq<_LhsDuration, _LhsDuration>
531
{
532
    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
533
    bool operator()(const _LhsDuration& __lhs, const _LhsDuration& __rhs) const
534
        {return __lhs.count() == __rhs.count();}
535
};
536
537
template <class _Rep1, class _Period1, class _Rep2, class _Period2>
538
inline _LIBCPP_INLINE_VISIBILITY
539
_LIBCPP_CONSTEXPR
540
bool
541
operator==(const duration<_Rep1, _Period1>& __lhs, const duration<_Rep2, _Period2>& __rhs)
542
{
543
    return __duration_eq<duration<_Rep1, _Period1>, duration<_Rep2, _Period2> >()(__lhs, __rhs);
544
}
545
546
// Duration !=
547
548
template <class _Rep1, class _Period1, class _Rep2, class _Period2>
549
inline _LIBCPP_INLINE_VISIBILITY
550
_LIBCPP_CONSTEXPR
551
bool
552
operator!=(const duration<_Rep1, _Period1>& __lhs, const duration<_Rep2, _Period2>& __rhs)
553
{
554
    return !(__lhs == __rhs);
555
}
556
557
// Duration <
558
559
template <class _LhsDuration, class _RhsDuration>
560
struct __duration_lt
561
{
562
    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
563
    bool operator()(const _LhsDuration& __lhs, const _RhsDuration& __rhs) const
564
        {
565
            typedef typename common_type<_LhsDuration, _RhsDuration>::type _Ct;
566
            return _Ct(__lhs).count() < _Ct(__rhs).count();
567
        }
568
};
569
570
template <class _LhsDuration>
571
struct __duration_lt<_LhsDuration, _LhsDuration>
572
{
573
    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
574
    bool operator()(const _LhsDuration& __lhs, const _LhsDuration& __rhs) const
575
        {return __lhs.count() < __rhs.count();}
576
};
577
578
template <class _Rep1, class _Period1, class _Rep2, class _Period2>
579
inline _LIBCPP_INLINE_VISIBILITY
580
_LIBCPP_CONSTEXPR
581
bool
582
operator< (const duration<_Rep1, _Period1>& __lhs, const duration<_Rep2, _Period2>& __rhs)
583
{
584
    return __duration_lt<duration<_Rep1, _Period1>, duration<_Rep2, _Period2> >()(__lhs, __rhs);
585
}
586
587
// Duration >
588
589
template <class _Rep1, class _Period1, class _Rep2, class _Period2>
590
inline _LIBCPP_INLINE_VISIBILITY
591
_LIBCPP_CONSTEXPR
592
bool
593
operator> (const duration<_Rep1, _Period1>& __lhs, const duration<_Rep2, _Period2>& __rhs)
594
{
595
    return __rhs < __lhs;
596
}
597
598
// Duration <=
599
600
template <class _Rep1, class _Period1, class _Rep2, class _Period2>
601
inline _LIBCPP_INLINE_VISIBILITY
602
_LIBCPP_CONSTEXPR
603
bool
604
operator<=(const duration<_Rep1, _Period1>& __lhs, const duration<_Rep2, _Period2>& __rhs)
605
{
606
    return !(__rhs < __lhs);
607
}
608
609
// Duration >=
610
611
template <class _Rep1, class _Period1, class _Rep2, class _Period2>
612
inline _LIBCPP_INLINE_VISIBILITY
613
_LIBCPP_CONSTEXPR
614
bool
615
operator>=(const duration<_Rep1, _Period1>& __lhs, const duration<_Rep2, _Period2>& __rhs)
616
{
617
    return !(__lhs < __rhs);
618
}
619
620
// Duration +
621
622
template <class _Rep1, class _Period1, class _Rep2, class _Period2>
623
inline _LIBCPP_INLINE_VISIBILITY
624
_LIBCPP_CONSTEXPR
625
typename common_type<duration<_Rep1, _Period1>, duration<_Rep2, _Period2> >::type
626
operator+(const duration<_Rep1, _Period1>& __lhs, const duration<_Rep2, _Period2>& __rhs)
627
{
628
    typedef typename common_type<duration<_Rep1, _Period1>, duration<_Rep2, _Period2> >::type _Cd;
629
    return _Cd(_Cd(__lhs).count() + _Cd(__rhs).count());
630
}
631
632
// Duration -
633
634
template <class _Rep1, class _Period1, class _Rep2, class _Period2>
635
inline _LIBCPP_INLINE_VISIBILITY
636
_LIBCPP_CONSTEXPR
637
typename common_type<duration<_Rep1, _Period1>, duration<_Rep2, _Period2> >::type
638
operator-(const duration<_Rep1, _Period1>& __lhs, const duration<_Rep2, _Period2>& __rhs)
639
{
640
    typedef typename common_type<duration<_Rep1, _Period1>, duration<_Rep2, _Period2> >::type _Cd;
641
    return _Cd(_Cd(__lhs).count() - _Cd(__rhs).count());
642
}
643
644
// Duration *
645
646
template <class _Rep1, class _Period, class _Rep2>
647
inline _LIBCPP_INLINE_VISIBILITY
648
_LIBCPP_CONSTEXPR
649
typename enable_if
650
<
651
    is_convertible<_Rep2, typename common_type<_Rep1, _Rep2>::type>::value,
652
    duration<typename common_type<_Rep1, _Rep2>::type, _Period>
653
>::type
654
operator*(const duration<_Rep1, _Period>& __d, const _Rep2& __s)
655
{
656
    typedef typename common_type<_Rep1, _Rep2>::type _Cr;
657
    typedef duration<_Cr, _Period> _Cd;
658
    return _Cd(_Cd(__d).count() * static_cast<_Cr>(__s));
659
}
660
661
template <class _Rep1, class _Period, class _Rep2>
662
inline _LIBCPP_INLINE_VISIBILITY
663
_LIBCPP_CONSTEXPR
664
typename enable_if
665
<
666
    is_convertible<_Rep1, typename common_type<_Rep1, _Rep2>::type>::value,
667
    duration<typename common_type<_Rep1, _Rep2>::type, _Period>
668
>::type
669
operator*(const _Rep1& __s, const duration<_Rep2, _Period>& __d)
670
{
671
    return __d * __s;
672
}
673
674
// Duration /
675
676
template <class _Duration, class _Rep, bool = __is_duration<_Rep>::value>
677
struct __duration_divide_result
678
{
679
};
680
681
template <class _Duration, class _Rep2,
682
    bool = is_convertible<_Rep2,
683
                          typename common_type<typename _Duration::rep, _Rep2>::type>::value>
684
struct __duration_divide_imp
685
{
686
};
687
688
template <class _Rep1, class _Period, class _Rep2>
689
struct __duration_divide_imp<duration<_Rep1, _Period>, _Rep2, true>
690
{
691
    typedef duration<typename common_type<_Rep1, _Rep2>::type, _Period> type;
692
};
693
694
template <class _Rep1, class _Period, class _Rep2>
695
struct __duration_divide_result<duration<_Rep1, _Period>, _Rep2, false>
696
    : __duration_divide_imp<duration<_Rep1, _Period>, _Rep2>
697
{
698
};
699
700
template <class _Rep1, class _Period, class _Rep2>
701
inline _LIBCPP_INLINE_VISIBILITY
702
_LIBCPP_CONSTEXPR
703
typename __duration_divide_result<duration<_Rep1, _Period>, _Rep2>::type
704
operator/(const duration<_Rep1, _Period>& __d, const _Rep2& __s)
705
{
706
    typedef typename common_type<_Rep1, _Rep2>::type _Cr;
707
    typedef duration<_Cr, _Period> _Cd;
708
    return _Cd(_Cd(__d).count() / static_cast<_Cr>(__s));
709
}
710
711
template <class _Rep1, class _Period1, class _Rep2, class _Period2>
712
inline _LIBCPP_INLINE_VISIBILITY
713
_LIBCPP_CONSTEXPR
714
typename common_type<_Rep1, _Rep2>::type
715
operator/(const duration<_Rep1, _Period1>& __lhs, const duration<_Rep2, _Period2>& __rhs)
716
{
717
    typedef typename common_type<duration<_Rep1, _Period1>, duration<_Rep2, _Period2> >::type _Ct;
718
    return _Ct(__lhs).count() / _Ct(__rhs).count();
719
}
720
721
// Duration %
722
723
template <class _Rep1, class _Period, class _Rep2>
724
inline _LIBCPP_INLINE_VISIBILITY
725
_LIBCPP_CONSTEXPR
726
typename __duration_divide_result<duration<_Rep1, _Period>, _Rep2>::type
727
operator%(const duration<_Rep1, _Period>& __d, const _Rep2& __s)
728
{
729
    typedef typename common_type<_Rep1, _Rep2>::type _Cr;
730
    typedef duration<_Cr, _Period> _Cd;
731
    return _Cd(_Cd(__d).count() % static_cast<_Cr>(__s));
732
}
733
734
template <class _Rep1, class _Period1, class _Rep2, class _Period2>
735
inline _LIBCPP_INLINE_VISIBILITY
736
_LIBCPP_CONSTEXPR
737
typename common_type<duration<_Rep1, _Period1>, duration<_Rep2, _Period2> >::type
738
operator%(const duration<_Rep1, _Period1>& __lhs, const duration<_Rep2, _Period2>& __rhs)
739
{
740
    typedef typename common_type<_Rep1, _Rep2>::type _Cr;
741
    typedef typename common_type<duration<_Rep1, _Period1>, duration<_Rep2, _Period2> >::type _Cd;
742
    return _Cd(static_cast<_Cr>(_Cd(__lhs).count()) % static_cast<_Cr>(_Cd(__rhs).count()));
743
}
744
745
//////////////////////////////////////////////////////////
746
///////////////////// time_point /////////////////////////
747
//////////////////////////////////////////////////////////
748
749
template <class _Clock, class _Duration = typename _Clock::duration>
750
class _LIBCPP_TYPE_VIS_ONLY time_point
751
{
752
    static_assert(__is_duration<_Duration>::value,
753
                  "Second template parameter of time_point must be a std::chrono::duration");
754
public:
755
    typedef _Clock                    clock;
756
    typedef _Duration                 duration;
757
    typedef typename duration::rep    rep;
758
    typedef typename duration::period period;
759
private:
760
    duration __d_;
761
762
public:
763
    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 time_point() : __d_(duration::zero()) {}
764
    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 explicit time_point(const duration& __d) : __d_(__d) {}
765
766
    // conversions
767
    template <class _Duration2>
768
    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
769
    time_point(const time_point<clock, _Duration2>& t,
770
        typename enable_if
771
        <
772
            is_convertible<_Duration2, duration>::value
773
        >::type* = 0)
774
            : __d_(t.time_since_epoch()) {}
775
776
    // observer
777
778
    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 duration time_since_epoch() const {return __d_;}
779
780
    // arithmetic
781
782
    _LIBCPP_INLINE_VISIBILITY time_point& operator+=(const duration& __d) {__d_ += __d; return *this;}
783
    _LIBCPP_INLINE_VISIBILITY time_point& operator-=(const duration& __d) {__d_ -= __d; return *this;}
784
785
    // special values
786
787
    _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR time_point min() {return time_point(duration::min());}
788
    _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR time_point max() {return time_point(duration::max());}
789
};
790
791
} // chrono
792
793
template <class _Clock, class _Duration1, class _Duration2>
794
struct _LIBCPP_TYPE_VIS_ONLY common_type<chrono::time_point<_Clock, _Duration1>,
795
                                         chrono::time_point<_Clock, _Duration2> >
796
{
797
    typedef chrono::time_point<_Clock, typename common_type<_Duration1, _Duration2>::type> type;
798
};
799
800
namespace chrono {
801
802
template <class _ToDuration, class _Clock, class _Duration>
803
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
804
time_point<_Clock, _ToDuration>
805
time_point_cast(const time_point<_Clock, _Duration>& __t)
806
{
807
    return time_point<_Clock, _ToDuration>(_VSTD::chrono::duration_cast<_ToDuration>(__t.time_since_epoch()));
808
}
809
810
// time_point ==
811
812
template <class _Clock, class _Duration1, class _Duration2>
813
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
814
bool
815
operator==(const time_point<_Clock, _Duration1>& __lhs, const time_point<_Clock, _Duration2>& __rhs)
816
{
817
    return __lhs.time_since_epoch() == __rhs.time_since_epoch();
818
}
819
820
// time_point !=
821
822
template <class _Clock, class _Duration1, class _Duration2>
823
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
824
bool
825
operator!=(const time_point<_Clock, _Duration1>& __lhs, const time_point<_Clock, _Duration2>& __rhs)
826
{
827
    return !(__lhs == __rhs);
828
}
829
830
// time_point <
831
832
template <class _Clock, class _Duration1, class _Duration2>
833
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
834
bool
835
operator<(const time_point<_Clock, _Duration1>& __lhs, const time_point<_Clock, _Duration2>& __rhs)
836
{
837
    return __lhs.time_since_epoch() < __rhs.time_since_epoch();
838
}
839
840
// time_point >
841
842
template <class _Clock, class _Duration1, class _Duration2>
843
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
844
bool
845
operator>(const time_point<_Clock, _Duration1>& __lhs, const time_point<_Clock, _Duration2>& __rhs)
846
{
847
    return __rhs < __lhs;
848
}
849
850
// time_point <=
851
852
template <class _Clock, class _Duration1, class _Duration2>
853
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
854
bool
855
operator<=(const time_point<_Clock, _Duration1>& __lhs, const time_point<_Clock, _Duration2>& __rhs)
856
{
857
    return !(__rhs < __lhs);
858
}
859
860
// time_point >=
861
862
template <class _Clock, class _Duration1, class _Duration2>
863
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
864
bool
865
operator>=(const time_point<_Clock, _Duration1>& __lhs, const time_point<_Clock, _Duration2>& __rhs)
866
{
867
    return !(__lhs < __rhs);
868
}
869
870
// time_point operator+(time_point x, duration y);
871
872
template <class _Clock, class _Duration1, class _Rep2, class _Period2>
873
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
874
time_point<_Clock, typename common_type<_Duration1, duration<_Rep2, _Period2> >::type>
875
operator+(const time_point<_Clock, _Duration1>& __lhs, const duration<_Rep2, _Period2>& __rhs)
876
{
877
    typedef time_point<_Clock, typename common_type<_Duration1, duration<_Rep2, _Period2> >::type> _Tr;
878
    return _Tr (__lhs.time_since_epoch() + __rhs);
879
}
880
881
// time_point operator+(duration x, time_point y);
882
883
template <class _Rep1, class _Period1, class _Clock, class _Duration2>
884
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
885
time_point<_Clock, typename common_type<duration<_Rep1, _Period1>, _Duration2>::type>
886
operator+(const duration<_Rep1, _Period1>& __lhs, const time_point<_Clock, _Duration2>& __rhs)
887
{
888
    return __rhs + __lhs;
889
}
890
891
// time_point operator-(time_point x, duration y);
892
893
template <class _Clock, class _Duration1, class _Rep2, class _Period2>
894
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
895
time_point<_Clock, typename common_type<_Duration1, duration<_Rep2, _Period2> >::type>
896
operator-(const time_point<_Clock, _Duration1>& __lhs, const duration<_Rep2, _Period2>& __rhs)
897
{
898
    return __lhs + (-__rhs);
899
}
900
901
// duration operator-(time_point x, time_point y);
902
903
template <class _Clock, class _Duration1, class _Duration2>
904
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
905
typename common_type<_Duration1, _Duration2>::type
906
operator-(const time_point<_Clock, _Duration1>& __lhs, const time_point<_Clock, _Duration2>& __rhs)
907
{
908
    return __lhs.time_since_epoch() - __rhs.time_since_epoch();
909
}
910
911
//////////////////////////////////////////////////////////
912
/////////////////////// clocks ///////////////////////////
913
//////////////////////////////////////////////////////////
914
915
class _LIBCPP_TYPE_VIS system_clock
916
{
917
public:
918
    typedef microseconds                     duration;
919
    typedef duration::rep                    rep;
920
    typedef duration::period                 period;
921
    typedef chrono::time_point<system_clock> time_point;
922
    static _LIBCPP_CONSTEXPR_AFTER_CXX11 const bool is_steady = false;
923
924
    static time_point now() _NOEXCEPT;
925
    static time_t     to_time_t  (const time_point& __t) _NOEXCEPT;
926
    static time_point from_time_t(time_t __t) _NOEXCEPT;
927
};
928
929
#ifndef _LIBCPP_HAS_NO_MONOTONIC_CLOCK
930
class _LIBCPP_TYPE_VIS steady_clock
931
{
932
public:
933
    typedef nanoseconds                                   duration;
934
    typedef duration::rep                                 rep;
935
    typedef duration::period                              period;
936
    typedef chrono::time_point<steady_clock, duration>    time_point;
937
    static _LIBCPP_CONSTEXPR_AFTER_CXX11 const bool is_steady = true;
938
939
    static time_point now() _NOEXCEPT;
940
};
941
942
typedef steady_clock high_resolution_clock;
943
#else
944
typedef system_clock high_resolution_clock;
945
#endif
946
947
} // chrono
948
949
#if _LIBCPP_STD_VER > 11
950
// Suffixes for duration literals [time.duration.literals]
951
inline namespace literals
952
{
953
  inline namespace chrono_literals
954
  {
955
956
    constexpr chrono::hours operator"" h(unsigned long long __h)
957
    {
958
        return chrono::hours(static_cast<chrono::hours::rep>(__h));
959
    }
960
961
    constexpr chrono::duration<long double, ratio<3600,1>> operator"" h(long double __h)
962
    {
963
        return chrono::duration<long double, ratio<3600,1>>(__h);
964
    }
965
966
967
    constexpr chrono::minutes operator"" min(unsigned long long __m)
968
    {
969
        return chrono::minutes(static_cast<chrono::minutes::rep>(__m));
970
    }
971
972
    constexpr chrono::duration<long double, ratio<60,1>> operator"" min(long double __m)
973
    {
974
        return chrono::duration<long double, ratio<60,1>> (__m);
975
    }
976
977
978
    constexpr chrono::seconds operator"" s(unsigned long long __s)
979
    {
980
        return chrono::seconds(static_cast<chrono::seconds::rep>(__s));
981
    }
982
983
    constexpr chrono::duration<long double> operator"" s(long double __s)
984
    {
985
        return chrono::duration<long double> (__s);
986
    }
987
988
989
    constexpr chrono::milliseconds operator"" ms(unsigned long long __ms)
990
    {
991
        return chrono::milliseconds(static_cast<chrono::milliseconds::rep>(__ms));
992
    }
993
994
    constexpr chrono::duration<long double, milli> operator"" ms(long double __ms)
995
    {
996
        return chrono::duration<long double, milli>(__ms);
997
    }
998
999
1000
    constexpr chrono::microseconds operator"" us(unsigned long long __us)
1001
    {
1002
        return chrono::microseconds(static_cast<chrono::microseconds::rep>(__us));
1003
    }
1004
1005
    constexpr chrono::duration<long double, micro> operator"" us(long double __us)
1006
    {
1007
        return chrono::duration<long double, micro> (__us);
1008
    }
1009
1010
1011
    constexpr chrono::nanoseconds operator"" ns(unsigned long long __ns)
1012
    {
1013
        return chrono::nanoseconds(static_cast<chrono::nanoseconds::rep>(__ns));
1014
    }
1015
1016
    constexpr chrono::duration<long double, nano> operator"" ns(long double __ns)
1017
    {
1018
        return chrono::duration<long double, nano> (__ns);
1019
    }
1020
1021
}}
1022
1023
namespace chrono { // hoist the literals into namespace std::chrono
1024
   using namespace literals::chrono_literals;
1025
}
1026
1027
#endif
1028
1029
_LIBCPP_END_NAMESPACE_STD
1030
1031
#endif  // _LIBCPP_CHRONO