# std::chrono::zoned_time<Duration,TimeZonePtr>::zoned_time

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< cpp‎ | chrono‎ | zoned time

zoned_time(); | (1) | (since C++20)
zoned_time(const std::chrono::sys_time <Duration>& st); | (2) | (since C++20)
zoned_time(const zoned_time& other) = default; | (3) | (since C++20)
template< class Duration2 > zoned_time(const std::chrono::zoned_time <Duration2, TimeZonePtr>& other); | (4) | (since C++20)
explicit zoned_time(TimeZonePtr z); | (5) | (since C++20)
explicit zoned_time( std::string_view name); | (6) | (since C++20)
zoned_time(TimeZonePtr z, const std::chrono::sys_time <Duration>& st); | (7) | (since C++20)
zoned_time( std::string_view name, const std::chrono::sys_time <Duration>& st); | (8) | (since C++20)
zoned_time(TimeZonePtr z, const std::chrono::local_time <Duration>& tp); | (9) | (since C++20)
zoned_time( std::string_view name, const std::chrono::local_time <Duration>& tp); | (10) | (since C++20)
zoned_time(TimeZonePtr z, const std::chrono::local_time <Duration>& tp, std::chrono::choose c); | (11) | (since C++20)
zoned_time( std::string_view name, const std::chrono::local_time <Duration>& tp, std::chrono::choose c); | (12) | (since C++20)
template< class Duration2, class TimeZonePtr2 > zoned_time(TimeZonePtr z, const std::chrono::zoned_time <Duration2, TimeZonePtr2>& zt); | (13) | (since C++20)
template< class Duration2, class TimeZonePtr2 > zoned_time(TimeZonePtr z, const std::chrono::zoned_time <Duration2, TimeZonePtr2>& zt, choose); | (14) | (since C++20)
template< class Duration2, class TimeZonePtr2 > zoned_time( std::string_view name, const std::chrono::zoned_time <Duration2, TimeZonePtr2>& zt); | (15) | (since C++20)
template< class Duration2, class TimeZonePtr2 > zoned_time( std::string_view name, const std::chrono::zoned_time <Duration2, TimeZonePtr2>& zt, choose); | (16) | (since C++20)

Constructs a `zoned_time` object, initializing the stored time zone pointer and time point according to the following table, where `traits` is std::chrono::zoned_traits <TimeZonePtr>:

Overload | Time zone pointer (denoted `zone`) | Time point (a std::chrono::sys_time <duration>) | Notes
--- | --- | --- | ---
(1) | traits::default_zone() | default constructed | (a)
(2) | `st`
(3) | other.get_time_zone() | other.get_sys_time() | (b)
(4) | other.get_time_zone() | other.get_sys_time() | (e)
(5) | std::move(z) | default constructed |
(6) | traits::locate_zone(name) | (c)
(7) | std::move(z) | `st` |
(8) | traits::locate_zone(name) | (c)
(9) | std::move(z) | zone->to_sys(tp) | (d)
(10) | traits::locate_zone(name) | (c,d)
(11) | std::move(z) | zone->to_sys(tp, c) | (d)
(12) | traits::locate_zone(name) | (c,d)
(13-14) | std::move(z) | zt.get_sys_time() | (e)
(15-16) | traits::locate_zone(name) | (c,e)

a) Constructors specified to call traits::default_zone() (1-2) do not participate in overload resolution if that expression is not well-formed.
b) The defaulted copy constructor (3) is defined as deleted if std::is_copy_constructible_v <TimeZonePtr> is false.
c) Constructors with a std::string_view parameter `name` (6,8,10,12,15-16) do not participate in overload resolution if traits::locate_zone(name) is not well-formed or if that expression is not convertible to `TimeZonePtr`.
d) Constructors specified to call zone->to_sys (9-12) do not participate in overload resolution if that call expression is not well-formed or if the result is not convertible to std::chrono::sys_time <duration>.
e) Constructors with a template parameter `Duration2` (4,13-16) do not participate in overload resolution if `Duration2` is not convertible to `Duration`.

The behavior is undefined if the time zone pointer (initialized as described above) does not refer to a time zone.

### Notes

`zoned_time` does not have a move constructor and attempting to move one will perform a copy instead using the defaulted copy constructor (3). Thus, when `TimeZonePtr` is a move-only type, `zoned_time` is immovable: it can be neither moved nor copied.

The constructors (14,16) accept a std::chrono::choose parameter, but that parameter has no effect.

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