27 Time library [time]

27.11 Time zones [time.zone]

27.11.7 Class template zoned_­time [time.zone.zonedtime]

27.11.7.2 Constructors [time.zone.zonedtime.ctor]

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zoned_time();
1
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Constraints: traits​::​default_­zone() is a well-formed expression.
2
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Effects: Initializes zone_­ with traits​::​default_­zone() and default constructs tp_­.
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zoned_time(const sys_time<Duration>& st);
3
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Constraints: traits​::​default_­zone() is a well-formed expression.
4
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Effects: Initializes zone_­ with traits​::​default_­zone() and tp_­ with st.
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explicit zoned_time(TimeZonePtr z);
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Preconditions: z refers to a time zone.
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Effects: Initializes zone_­ with std​::​move(z) and default constructs tp_­.
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explicit zoned_time(string_view name);
7
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Constraints: traits​::​locate_­zone(string_­view{}) is a well-formed expression and zoned_­time is constructible from the return type of traits​::​locate_­zone(string_­view{}).
8
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Effects: Initializes zone_­ with traits​::​locate_­zone(name) and default constructs tp_­.
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template<class Duration2> zoned_time(const zoned_time<Duration2, TimeZonePtr>& y);
9
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Constraints: is_­convertible_­v<sys_­time<Duration2>, sys_­time<Duration>> is true.
10
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Effects: Initializes zone_­ with y.zone_­ and tp_­ with y.tp_­.
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zoned_time(TimeZonePtr z, const sys_time<Duration>& st);
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Preconditions: z refers to a time zone.
12
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Effects: Initializes zone_­ with std​::​move(z) and tp_­ with st.
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zoned_time(string_view name, const sys_time<Duration>& st);
13
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Constraints: zoned_­time is constructible from the return type of traits​::​locate_­zone(name) and st.
14
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Effects: Equivalent to construction with {traits​::​locate_­zone(name), st}.
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zoned_time(TimeZonePtr z, const local_time<Duration>& tp);
15
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Constraints: is_convertible_v< decltype(declval<TimeZonePtr&>()->to_sys(local_time<Duration>{})), sys_time<duration>> is true.
16
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Preconditions: z refers to a time zone.
17
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Effects: Initializes zone_­ with std​::​move(z) and tp_­ with zone_­->to_­sys(tp).
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zoned_time(string_view name, const local_time<Duration>& tp);
18
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Constraints: zoned_­time is constructible from the return type of traits​::​locate_­zone(name) and tp.
19
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Effects: Equivalent to construction with {traits​::​locate_­zone(name), tp}.
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zoned_time(TimeZonePtr z, const local_time<Duration>& tp, choose c);
20
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Constraints: is_convertible_v< decltype(declval<TimeZonePtr&>()->to_sys(local_time<Duration>{}, choose::earliest)), sys_time<duration>> is true.
21
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Preconditions: z refers to a time zone.
22
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Effects: Initializes zone_­ with std​::​move(z) and tp_­ with zone_­->to_­sys(tp, c).
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zoned_time(string_view name, const local_time<Duration>& tp, choose c);
23
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Constraints: zoned_­time is constructible from the return type of traits​::​locate_­zone(name), local_­time<Duration>, and choose.
24
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Effects: Equivalent to construction with {traits​::​locate_­zone(name), tp, c}.
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template<class Duration2, class TimeZonePtr2> zoned_time(TimeZonePtr z, const zoned_time<Duration2, TimeZonePtr2>& y);
25
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Constraints: is_­convertible_­v<sys_­time<Duration2>, sys_­time<Duration>> is true.
26
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Preconditions: z refers to a valid time zone.
27
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Effects: Initializes zone_­ with std​::​move(z) and tp_­ with y.tp_­.
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template<class Duration2, class TimeZonePtr2> zoned_time(TimeZonePtr z, const zoned_time<Duration2, TimeZonePtr2>& y, choose);
28
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Constraints: is_­convertible_­v<sys_­time<Duration2>, sys_­time<Duration>> is true.
29
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Preconditions: z refers to a valid time zone.
30
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Effects: Equivalent to construction with {z, y}.
31
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[Note 1:
The choose parameter has no effect.
— end note]
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template<class Duration2, class TimeZonePtr2> zoned_time(string_view name, const zoned_time<Duration2, TimeZonePtr2>& y);
32
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Constraints: zoned_­time is constructible from the return type of traits​::​locate_­zone(name) and the type zoned_­time<Duration2, TimeZonePtr2>.
33
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Effects: Equivalent to construction with {traits​::​locate_­zone(name), y}.
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template<class Duration2, class TimeZonePtr2> zoned_time(string_view name, const zoned_time<Duration2, TimeZonePtr2>& y, choose c);
34
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Constraints: zoned_­time is constructible from the return type of traits​::​locate_­zone(name), the type zoned_­time<Duration2, TimeZonePtr2>, and the type choose.
35
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Effects: Equivalent to construction with {traits​::​locate_­zone(name), y, c}.
36
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[Note 2:
The choose parameter has no effect.
— end note]