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</pre><pre class="rust"><code><span class="doccomment">//! # Chrono-TZ
//!
//! `Chrono-TZ` is a library that provides implementors of the
//! [`TimeZone`][timezone] trait for [`chrono`][chrono]. The
//! impls are generated by a build script using the [`IANA database`][iana]
//! and [`zoneinfo_parse`][zoneinfo_parse].
//!
//! [chrono]: https://github.com/lifthrasiir/rust-chrono
//! [timezone]: https://lifthrasiir.github.io/rust-chrono/chrono/offset/trait.TimeZone.html
//! [iana]: http://www.iana.org/time-zones
//! [zoneinfo_parse]: https://github.com/rust-datetime/zoneinfo-parse
//!
//! ## Examples
//!
//! Create a time in one timezone and convert it to UTC
//!
//! ```
//! # extern crate chrono;
//! # extern crate chrono_tz;
//! use chrono::{TimeZone, Utc};
//! use chrono_tz::US::Pacific;
//!
//! # fn main() {
//! let pacific_time = Pacific.ymd(1990, 5, 6).and_hms(12, 30, 45);
//! let utc_time = pacific_time.with_timezone(&Utc);
//! assert_eq!(utc_time, Utc.ymd(1990, 5, 6).and_hms(19, 30, 45));
//! # }
//! ```
//!
//! Create a naive datetime and convert it to a timezone-aware datetime
//!
//! ```
//! # extern crate chrono;
//! # extern crate chrono_tz;
//! use chrono::{TimeZone, NaiveDate};
//! use chrono_tz::Africa::Johannesburg;
//!
//! # fn main() {
//! let naive_dt = NaiveDate::from_ymd(2038, 1, 19).and_hms(3, 14, 08);
//! let tz_aware = Johannesburg.from_local_datetime(&naive_dt).unwrap();
//! assert_eq!(tz_aware.to_string(), "2038-01-19 03:14:08 SAST");
//! # }
//! ```
//!
//! London and New York change their clocks on different days in March
//! so only have a 4-hour difference on certain days.
//!
//! ```
//! # extern crate chrono;
//! # extern crate chrono_tz;
//! use chrono::TimeZone;
//! use chrono_tz::Europe::London;
//! use chrono_tz::America::New_York;
//!
//! # fn main() {
//! let london_time = London.ymd(2016, 3, 18).and_hms(3, 0, 0);
//! let ny_time = london_time.with_timezone(&New_York);
//! assert_eq!(ny_time, New_York.ymd(2016, 3, 17).and_hms(23, 0, 0));
//! # }
//! ```
//!
//! Adding 24 hours across a daylight savings change causes a change
//! in local time
//!
//! ```
//! # extern crate chrono;
//! # extern crate chrono_tz;
//! use chrono::{TimeZone, Duration};
//! use chrono_tz::Europe::London;
//!
//! # fn main() {
//! let dt = London.ymd(2016, 10, 29).and_hms(12, 0, 0);
//! let later = dt + Duration::hours(24);
//! assert_eq!(later, London.ymd(2016, 10, 30).and_hms(11, 0, 0));
//! # }
//! ```
//!
//! And of course you can always convert a local time to a unix timestamp
//!
//! ```
//! # extern crate chrono;
//! # extern crate chrono_tz;
//! use chrono::TimeZone;
//! use chrono_tz::Asia::Kolkata;
//!
//! # fn main() {
//! let dt = Kolkata.ymd(2000, 1, 1).and_hms(0, 0, 0);
//! let timestamp = dt.timestamp();
//! assert_eq!(timestamp, 946665000);
//! # }
//! ```
//!
//! Pretty-printing a string will use the correct abbreviation for the timezone
//!
//! ```
//! # extern crate chrono;
//! # extern crate chrono_tz;
//! use chrono::TimeZone;
//! use chrono_tz::Europe::London;
//!
//! # fn main() {
//! let dt = London.ymd(2016, 5, 10).and_hms(12, 0, 0);
//! assert_eq!(dt.to_string(), "2016-05-10 12:00:00 BST");
//! assert_eq!(dt.to_rfc3339(), "2016-05-10T12:00:00+01:00");
//! # }
//! ```
//!
//! You can convert a timezone string to a timezone using the FromStr trait
//!
//! ```
//! # extern crate chrono;
//! # extern crate chrono_tz;
//! use chrono::TimeZone;
//! use chrono_tz::Tz;
//! use chrono_tz::UTC;
//!
//! # fn main() {
//! let tz: Tz = "Antarctica/South_Pole".parse().unwrap();
//! let dt = tz.ymd(2016, 10, 22).and_hms(12, 0, 0);
//! let utc = dt.with_timezone(&UTC);
//! assert_eq!(utc.to_string(), "2016-10-21 23:00:00 UTC");
//! # }
//! ```
//!
//! If you need to iterate over all variants you can use the TZ_VARIANTS array
//! ```
//! use chrono_tz::{TZ_VARIANTS, Tz};
//! assert!(TZ_VARIANTS.iter().any(|v| *v == Tz::UTC));
//! ```
</span><span class="attr">#![cfg_attr(not(feature = <span class="string">"std"</span>), no_std)]
#[cfg(feature = <span class="string">"serde"</span>)]
</span><span class="kw">mod </span>serde;
<span class="kw">mod </span>binary_search;
<span class="kw">mod </span>directory;
<span class="kw">mod </span>timezone_impl;
<span class="kw">mod </span>timezones;
<span class="kw">pub use </span><span class="kw">crate</span>::directory::<span class="kw-2">*</span>;
<span class="kw">pub use </span><span class="kw">crate</span>::timezone_impl::{OffsetComponents, OffsetName};
<span class="kw">pub use </span><span class="kw">crate</span>::timezones::ParseError;
<span class="kw">pub use </span><span class="kw">crate</span>::timezones::Tz;
<span class="kw">pub use </span><span class="kw">crate</span>::timezones::TZ_VARIANTS;
<span class="attr">#[cfg(test)]
</span><span class="kw">mod </span>tests {
<span class="kw">use </span><span class="kw">super</span>::America::Danmarkshavn;
<span class="kw">use </span><span class="kw">super</span>::Asia::Dhaka;
<span class="kw">use </span><span class="kw">super</span>::Australia::Adelaide;
<span class="kw">use </span><span class="kw">super</span>::Europe::Berlin;
<span class="kw">use </span><span class="kw">super</span>::Europe::London;
<span class="kw">use </span><span class="kw">super</span>::Europe::Moscow;
<span class="kw">use </span><span class="kw">super</span>::Europe::Vilnius;
<span class="kw">use </span><span class="kw">super</span>::Europe::Warsaw;
<span class="kw">use </span><span class="kw">super</span>::Pacific::Apia;
<span class="kw">use </span><span class="kw">super</span>::Pacific::Noumea;
<span class="kw">use </span><span class="kw">super</span>::Pacific::Tahiti;
<span class="kw">use </span><span class="kw">super</span>::Tz;
<span class="kw">use </span><span class="kw">super</span>::US::Eastern;
<span class="kw">use </span><span class="kw">super</span>::UTC;
<span class="kw">use </span>chrono::{Duration, TimeZone};
<span class="attr">#[test]
</span><span class="kw">fn </span>london_to_berlin() {
<span class="kw">let </span>dt = London.ymd(<span class="number">2016</span>, <span class="number">10</span>, <span class="number">8</span>).and_hms(<span class="number">17</span>, <span class="number">0</span>, <span class="number">0</span>);
<span class="kw">let </span>converted = dt.with_timezone(<span class="kw-2">&</span>Berlin);
<span class="kw">let </span>expected = Berlin.ymd(<span class="number">2016</span>, <span class="number">10</span>, <span class="number">8</span>).and_hms(<span class="number">18</span>, <span class="number">0</span>, <span class="number">0</span>);
<span class="macro">assert_eq!</span>(converted, expected);
}
<span class="attr">#[test]
</span><span class="kw">fn </span>us_eastern_dst_commutativity() {
<span class="kw">let </span>dt = UTC.ymd(<span class="number">2002</span>, <span class="number">4</span>, <span class="number">7</span>).and_hms(<span class="number">7</span>, <span class="number">0</span>, <span class="number">0</span>);
<span class="kw">for </span>days <span class="kw">in </span>-<span class="number">420</span>..<span class="number">720 </span>{
<span class="kw">let </span>dt1 = (dt + Duration::days(days)).with_timezone(<span class="kw-2">&</span>Eastern);
<span class="kw">let </span>dt2 = dt.with_timezone(<span class="kw-2">&</span>Eastern) + Duration::days(days);
<span class="macro">assert_eq!</span>(dt1, dt2);
}
}
<span class="attr">#[test]
</span><span class="kw">fn </span>test_addition_across_dst_boundary() {
<span class="kw">use </span>chrono::TimeZone;
<span class="kw">let </span>two_hours = Duration::hours(<span class="number">2</span>);
<span class="kw">let </span>edt = Eastern.ymd(<span class="number">2019</span>, <span class="number">11</span>, <span class="number">3</span>).and_hms(<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>);
<span class="kw">let </span>est = edt + two_hours;
<span class="macro">assert_eq!</span>(edt.to_string(), <span class="string">"2019-11-03 00:00:00 EDT"</span>.to_string());
<span class="macro">assert_eq!</span>(est.to_string(), <span class="string">"2019-11-03 01:00:00 EST"</span>.to_string());
<span class="macro">assert_eq!</span>(est.timestamp(), edt.timestamp() + two_hours.num_seconds());
}
<span class="attr">#[test]
</span><span class="kw">fn </span>warsaw_tz_name() {
<span class="kw">let </span>dt = UTC.ymd(<span class="number">1915</span>, <span class="number">8</span>, <span class="number">4</span>).and_hms(<span class="number">22</span>, <span class="number">35</span>, <span class="number">59</span>);
<span class="macro">assert_eq!</span>(dt.with_timezone(<span class="kw-2">&</span>Warsaw).format(<span class="string">"%Z"</span>).to_string(), <span class="string">"WMT"</span>);
<span class="kw">let </span>dt = dt + Duration::seconds(<span class="number">1</span>);
<span class="macro">assert_eq!</span>(dt.with_timezone(<span class="kw-2">&</span>Warsaw).format(<span class="string">"%Z"</span>).to_string(), <span class="string">"CET"</span>);
}
<span class="attr">#[test]
</span><span class="kw">fn </span>vilnius_utc_offset() {
<span class="kw">let </span>dt = UTC.ymd(<span class="number">1916</span>, <span class="number">12</span>, <span class="number">31</span>).and_hms(<span class="number">22</span>, <span class="number">35</span>, <span class="number">59</span>).with_timezone(<span class="kw-2">&</span>Vilnius);
<span class="macro">assert_eq!</span>(dt, Vilnius.ymd(<span class="number">1916</span>, <span class="number">12</span>, <span class="number">31</span>).and_hms(<span class="number">23</span>, <span class="number">59</span>, <span class="number">59</span>));
<span class="kw">let </span>dt = dt + Duration::seconds(<span class="number">1</span>);
<span class="macro">assert_eq!</span>(dt, Vilnius.ymd(<span class="number">1917</span>, <span class="number">1</span>, <span class="number">1</span>).and_hms(<span class="number">0</span>, <span class="number">11</span>, <span class="number">36</span>));
}
<span class="attr">#[test]
</span><span class="kw">fn </span>victorian_times() {
<span class="kw">let </span>dt = UTC.ymd(<span class="number">1847</span>, <span class="number">12</span>, <span class="number">1</span>).and_hms(<span class="number">0</span>, <span class="number">1</span>, <span class="number">14</span>).with_timezone(<span class="kw-2">&</span>London);
<span class="macro">assert_eq!</span>(dt, London.ymd(<span class="number">1847</span>, <span class="number">11</span>, <span class="number">30</span>).and_hms(<span class="number">23</span>, <span class="number">59</span>, <span class="number">59</span>));
<span class="kw">let </span>dt = dt + Duration::seconds(<span class="number">1</span>);
<span class="macro">assert_eq!</span>(dt, London.ymd(<span class="number">1847</span>, <span class="number">12</span>, <span class="number">1</span>).and_hms(<span class="number">0</span>, <span class="number">1</span>, <span class="number">15</span>));
}
<span class="attr">#[test]
</span><span class="kw">fn </span>london_dst() {
<span class="kw">let </span>dt = London.ymd(<span class="number">2016</span>, <span class="number">3</span>, <span class="number">10</span>).and_hms(<span class="number">5</span>, <span class="number">0</span>, <span class="number">0</span>);
<span class="kw">let </span>later = dt + Duration::days(<span class="number">180</span>);
<span class="kw">let </span>expected = London.ymd(<span class="number">2016</span>, <span class="number">9</span>, <span class="number">6</span>).and_hms(<span class="number">6</span>, <span class="number">0</span>, <span class="number">0</span>);
<span class="macro">assert_eq!</span>(later, expected);
}
<span class="attr">#[test]
</span><span class="kw">fn </span>international_date_line_change() {
<span class="kw">let </span>dt = UTC.ymd(<span class="number">2011</span>, <span class="number">12</span>, <span class="number">30</span>).and_hms(<span class="number">9</span>, <span class="number">59</span>, <span class="number">59</span>).with_timezone(<span class="kw-2">&</span>Apia);
<span class="macro">assert_eq!</span>(dt, Apia.ymd(<span class="number">2011</span>, <span class="number">12</span>, <span class="number">29</span>).and_hms(<span class="number">23</span>, <span class="number">59</span>, <span class="number">59</span>));
<span class="kw">let </span>dt = dt + Duration::seconds(<span class="number">1</span>);
<span class="macro">assert_eq!</span>(dt, Apia.ymd(<span class="number">2011</span>, <span class="number">12</span>, <span class="number">31</span>).and_hms(<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>));
}
<span class="attr">#[test]
</span><span class="kw">fn </span>negative_offset_with_minutes_and_seconds() {
<span class="kw">let </span>dt = UTC.ymd(<span class="number">1900</span>, <span class="number">1</span>, <span class="number">1</span>).and_hms(<span class="number">12</span>, <span class="number">0</span>, <span class="number">0</span>).with_timezone(<span class="kw-2">&</span>Danmarkshavn);
<span class="macro">assert_eq!</span>(dt, Danmarkshavn.ymd(<span class="number">1900</span>, <span class="number">1</span>, <span class="number">1</span>).and_hms(<span class="number">10</span>, <span class="number">45</span>, <span class="number">20</span>));
}
<span class="attr">#[test]
</span><span class="kw">fn </span>monotonicity() {
<span class="kw">let </span><span class="kw-2">mut </span>dt = Noumea.ymd(<span class="number">1800</span>, <span class="number">1</span>, <span class="number">1</span>).and_hms(<span class="number">12</span>, <span class="number">0</span>, <span class="number">0</span>);
<span class="kw">for _ in </span><span class="number">0</span>..<span class="number">24 </span>* <span class="number">356 </span>* <span class="number">400 </span>{
<span class="kw">let </span>new = dt + Duration::hours(<span class="number">1</span>);
<span class="macro">assert!</span>(new > dt);
<span class="macro">assert!</span>(new.with_timezone(<span class="kw-2">&</span>UTC) > dt.with_timezone(<span class="kw-2">&</span>UTC));
dt = new;
}
}
<span class="kw">fn </span>test_inverse<T: TimeZone>(tz: T, begin: i32, end: i32) {
<span class="kw">for </span>y <span class="kw">in </span>begin..end {
<span class="kw">for </span>d <span class="kw">in </span><span class="number">1</span>..<span class="number">366 </span>{
<span class="kw">for </span>h <span class="kw">in </span><span class="number">0</span>..<span class="number">24 </span>{
<span class="kw">for </span>m <span class="kw">in </span><span class="number">0</span>..<span class="number">60 </span>{
<span class="kw">let </span>dt = UTC.yo(y, d).and_hms(h, m, <span class="number">0</span>);
<span class="kw">let </span>with_tz = dt.with_timezone(<span class="kw-2">&</span>tz);
<span class="kw">let </span>utc = with_tz.with_timezone(<span class="kw-2">&</span>UTC);
<span class="macro">assert_eq!</span>(dt, utc);
}
}
}
}
}
<span class="attr">#[test]
</span><span class="kw">fn </span>inverse_london() {
test_inverse(London, <span class="number">1989</span>, <span class="number">1994</span>);
}
<span class="attr">#[test]
</span><span class="kw">fn </span>inverse_dhaka() {
test_inverse(Dhaka, <span class="number">1995</span>, <span class="number">2000</span>);
}
<span class="attr">#[test]
</span><span class="kw">fn </span>inverse_apia() {
test_inverse(Apia, <span class="number">2011</span>, <span class="number">2012</span>);
}
<span class="attr">#[test]
</span><span class="kw">fn </span>inverse_tahiti() {
test_inverse(Tahiti, <span class="number">1911</span>, <span class="number">1914</span>);
}
<span class="attr">#[test]
</span><span class="kw">fn </span>string_representation() {
<span class="kw">let </span>dt = UTC.ymd(<span class="number">2000</span>, <span class="number">9</span>, <span class="number">1</span>).and_hms(<span class="number">12</span>, <span class="number">30</span>, <span class="number">15</span>).with_timezone(<span class="kw-2">&</span>Adelaide);
<span class="macro">assert_eq!</span>(dt.to_string(), <span class="string">"2000-09-01 22:00:15 ACST"</span>);
<span class="macro">assert_eq!</span>(<span class="macro">format!</span>(<span class="string">"{:?}"</span>, dt), <span class="string">"2000-09-01T22:00:15ACST"</span>);
<span class="macro">assert_eq!</span>(dt.to_rfc3339(), <span class="string">"2000-09-01T22:00:15+09:30"</span>);
<span class="macro">assert_eq!</span>(<span class="macro">format!</span>(<span class="string">"{}"</span>, dt), <span class="string">"2000-09-01 22:00:15 ACST"</span>);
}
<span class="attr">#[test]
</span><span class="kw">fn </span>tahiti() {
<span class="kw">let </span>dt = UTC.ymd(<span class="number">1912</span>, <span class="number">10</span>, <span class="number">1</span>).and_hms(<span class="number">9</span>, <span class="number">58</span>, <span class="number">16</span>).with_timezone(<span class="kw-2">&</span>Tahiti);
<span class="kw">let </span>before = dt - Duration::hours(<span class="number">1</span>);
<span class="macro">assert_eq!</span>(before, Tahiti.ymd(<span class="number">1912</span>, <span class="number">9</span>, <span class="number">30</span>).and_hms(<span class="number">23</span>, <span class="number">0</span>, <span class="number">0</span>));
<span class="kw">let </span>after = dt + Duration::hours(<span class="number">1</span>);
<span class="macro">assert_eq!</span>(after, Tahiti.ymd(<span class="number">1912</span>, <span class="number">10</span>, <span class="number">1</span>).and_hms(<span class="number">0</span>, <span class="number">58</span>, <span class="number">16</span>));
}
<span class="attr">#[test]
#[should_panic]
</span><span class="kw">fn </span>nonexistent_time() {
<span class="kw">let _ </span>= London.ymd(<span class="number">2016</span>, <span class="number">3</span>, <span class="number">27</span>).and_hms(<span class="number">1</span>, <span class="number">30</span>, <span class="number">0</span>);
}
<span class="attr">#[test]
#[should_panic]
</span><span class="kw">fn </span>nonexistent_time_2() {
<span class="kw">let _ </span>= London.ymd(<span class="number">2016</span>, <span class="number">3</span>, <span class="number">27</span>).and_hms(<span class="number">1</span>, <span class="number">0</span>, <span class="number">0</span>);
}
<span class="attr">#[test]
</span><span class="kw">fn </span>time_exists() {
<span class="kw">let _ </span>= London.ymd(<span class="number">2016</span>, <span class="number">3</span>, <span class="number">27</span>).and_hms(<span class="number">2</span>, <span class="number">0</span>, <span class="number">0</span>);
}
<span class="attr">#[test]
#[should_panic]
</span><span class="kw">fn </span>ambiguous_time() {
<span class="kw">let _ </span>= London.ymd(<span class="number">2016</span>, <span class="number">10</span>, <span class="number">30</span>).and_hms(<span class="number">1</span>, <span class="number">0</span>, <span class="number">0</span>);
}
<span class="attr">#[test]
#[should_panic]
</span><span class="kw">fn </span>ambiguous_time_2() {
<span class="kw">let _ </span>= London.ymd(<span class="number">2016</span>, <span class="number">10</span>, <span class="number">30</span>).and_hms(<span class="number">1</span>, <span class="number">30</span>, <span class="number">0</span>);
}
<span class="attr">#[test]
#[should_panic]
</span><span class="kw">fn </span>ambiguous_time_3() {
<span class="kw">let _ </span>= Moscow.ymd(<span class="number">2014</span>, <span class="number">10</span>, <span class="number">26</span>).and_hms(<span class="number">1</span>, <span class="number">30</span>, <span class="number">0</span>);
}
<span class="attr">#[test]
#[should_panic]
</span><span class="kw">fn </span>ambiguous_time_4() {
<span class="kw">let _ </span>= Moscow.ymd(<span class="number">2014</span>, <span class="number">10</span>, <span class="number">26</span>).and_hms(<span class="number">1</span>, <span class="number">0</span>, <span class="number">0</span>);
}
<span class="attr">#[test]
</span><span class="kw">fn </span>unambiguous_time() {
<span class="kw">let _ </span>= London.ymd(<span class="number">2016</span>, <span class="number">10</span>, <span class="number">30</span>).and_hms(<span class="number">2</span>, <span class="number">0</span>, <span class="number">0</span>);
}
<span class="attr">#[test]
</span><span class="kw">fn </span>unambiguous_time_2() {
<span class="kw">let _ </span>= Moscow.ymd(<span class="number">2014</span>, <span class="number">10</span>, <span class="number">26</span>).and_hms(<span class="number">2</span>, <span class="number">0</span>, <span class="number">0</span>);
}
<span class="attr">#[test]
</span><span class="kw">fn </span>test_get_name() {
<span class="macro">assert_eq!</span>(London.name(), <span class="string">"Europe/London"</span>);
<span class="macro">assert_eq!</span>(Tz::Africa__Abidjan.name(), <span class="string">"Africa/Abidjan"</span>);
<span class="macro">assert_eq!</span>(Tz::UTC.name(), <span class="string">"UTC"</span>);
<span class="macro">assert_eq!</span>(Tz::Zulu.name(), <span class="string">"Zulu"</span>);
}
<span class="attr">#[test]
</span><span class="kw">fn </span>test_display() {
<span class="macro">assert_eq!</span>(<span class="macro">format!</span>(<span class="string">"{}"</span>, London), <span class="string">"Europe/London"</span>);
<span class="macro">assert_eq!</span>(<span class="macro">format!</span>(<span class="string">"{}"</span>, Tz::Africa__Abidjan), <span class="string">"Africa/Abidjan"</span>);
<span class="macro">assert_eq!</span>(<span class="macro">format!</span>(<span class="string">"{}"</span>, Tz::UTC), <span class="string">"UTC"</span>);
<span class="macro">assert_eq!</span>(<span class="macro">format!</span>(<span class="string">"{}"</span>, Tz::Zulu), <span class="string">"Zulu"</span>);
}
<span class="attr">#[test]
</span><span class="kw">fn </span>test_impl_hash() {
<span class="attr">#[allow(dead_code)]
#[derive(Hash)]
</span><span class="kw">struct </span>Foo(Tz);
}
}
</code></pre></div>
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