25 Time library [time]

25.6 Class template time_­point [time.point]

25.6.1 Constructors [time.point.cons]

constexpr time_point();
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().