tmp/tmpmak5cvlj/{from.md → to.md}
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| 1 |
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#### Class `tzdb` <a id="time.zone.db.tzdb">[[time.zone.db.tzdb]]</a>
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``` cpp
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namespace std::chrono {
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struct tzdb {
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string version;
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vector<time_zone> zones;
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vector<time_zone_link> links;
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vector<leap_second> leap_seconds;
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const time_zone* locate_zone(string_view tz_name) const;
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const time_zone* current_zone() const;
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};
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}
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```
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Each `vector` in a `tzdb` object is sorted to enable fast lookup.
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``` cpp
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const time_zone* locate_zone(string_view tz_name) const;
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```
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*Returns:*
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- If `zones` contains an element `tz` for which `tz.name() == tz_name`,
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a pointer to `tz`;
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- otherwise, if `links` contains an element `tz_l` for which
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`tz_l.name() == tz_name`, then a pointer to the element `tz` of
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`zones` for which `tz.name() == tz_l.target()`.
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[*Note 1*: A `time_zone_link` specifies an alternative name for a
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`time_zone`. — *end note*]
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*Throws:* If a `const time_zone*` cannot be found as described in the
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*Returns:* clause, throws a `runtime_error`.
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[*Note 2*: On non-exceptional return, the return value is always a
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pointer to a valid `time_zone`. — *end note*]
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``` cpp
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const time_zone* current_zone() const;
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```
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*Returns:* A pointer to the time zone which the computer has set as its
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local time zone.
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