template <class Clock, class Duration = typename Clock::duration>
class time_point {
public:
typedef Clock clock;
typedef Duration duration;
typedef typename duration::rep rep;
typedef typename duration::period period;
private:
duration d_;
public:
constexpr time_point(); constexpr explicit time_point(const duration& d); template <class Duration2>
constexpr time_point(const time_point<clock, Duration2>& t);
constexpr duration time_since_epoch() const;
time_point& operator+=(const duration& d);
time_point& operator-=(const duration& d);
static constexpr time_point min();
static constexpr time_point max();
};
If Duration is not an instance of duration, the program is ill-formed.
20.12.6.1 time_point constructors [time.point.cons]Effects: Constructs an object of type time_point, initializing d_ with duration::zero(). Such a time_point object represents the epoch.
constexpr explicit time_point(const duration& d);
Effects: Constructs an object of type time_point, initializing d_ with d. Such a time_point object represents the epoch + d.
template <class Duration2> constexpr time_point(const time_point<clock, Duration2>& t);
Remarks: This constructor shall not participate in overload resolution unless Duration2 is implicitly convertible to duration.
Effects: Constructs an object of type time_point, initializing d_ with t.time_since_epoch().
20.12.6.4 time_point special values [time.point.special] static constexpr time_point min();
Returns: time_point(duration::min()).
static constexpr time_point max();
Returns: time_point(duration::max()).
20.12.6.5 time_point non-member arithmetic [time.point.nonmember] template <class Clock, class Duration1, class Rep2, class Period2> constexpr time_point<Clock, common_type_t<Duration1, duration<Rep2, Period2>>> operator+(const time_point<Clock, Duration1>& lhs, const duration<Rep2, Period2>& rhs);
Returns: CT(lhs.time_since_epoch() + rhs), where CT is the type of the return value.
template <class Rep1, class Period1, class Clock, class Duration2> constexpr time_point<Clock, common_type_t<duration<Rep1, Period1>, Duration2>> operator+(const duration<Rep1, Period1>& lhs, const time_point<Clock, Duration2>& rhs);
template <class Clock, class Duration1, class Rep2, class Period2> constexpr time_point<Clock, common_type_t<Duration1, duration<Rep2, Period2>>> operator-(const time_point<Clock, Duration1>& lhs, const duration<Rep2, Period2>& rhs);
template <class Clock, class Duration1, class Duration2> constexpr common_type_t<Duration1, Duration2> operator-(const time_point<Clock, Duration1>& lhs, const time_point<Clock, Duration2>& rhs);
Returns: lhs.time_since_epoch() - rhs.time_since_epoch().
20.12.6.6 time_point comparisons [time.point.comparisons] template <class Clock, class Duration1, class Duration2> constexpr bool operator==(const time_point<Clock, Duration1>& lhs, const time_point<Clock, Duration2>& rhs);
Returns: lhs.time_since_epoch() == rhs.time_since_epoch().
template <class Clock, class Duration1, class Duration2> constexpr bool operator!=(const time_point<Clock, Duration1>& lhs, const time_point<Clock, Duration2>& rhs);
template <class Clock, class Duration1, class Duration2> constexpr bool operator<(const time_point<Clock, Duration1>& lhs, const time_point<Clock, Duration2>& rhs);
Returns: lhs.time_since_epoch() < rhs.time_since_epoch().
template <class Clock, class Duration1, class Duration2> constexpr bool operator<=(const time_point<Clock, Duration1>& lhs, const time_point<Clock, Duration2>& rhs);
template <class Clock, class Duration1, class Duration2> constexpr bool operator>(const time_point<Clock, Duration1>& lhs, const time_point<Clock, Duration2>& rhs);
template <class Clock, class Duration1, class Duration2> constexpr bool operator>=(const time_point<Clock, Duration1>& lhs, const time_point<Clock, Duration2>& rhs);
template <class ToDuration, class Clock, class Duration> constexpr time_point<Clock, ToDuration> time_point_cast(const time_point<Clock, Duration>& t);
Remarks: This function shall not participate in overload resolution unless ToDuration is an instantiation of duration.
Returns: time_point<Clock, ToDuration>(duration_cast<ToDuration>(t.time_since_epoch())).
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