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</pre><pre class="rust"><code><span class="comment">// This is a part of Chrono.
// See README.md and LICENSE.txt for details.
</span><span class="doccomment">//! The UTC (Coordinated Universal Time) time zone.
</span><span class="kw">use </span>core::fmt;
<span class="attr">#[cfg(all(
feature = <span class="string">"clock"</span>,
not(all(
target_arch = <span class="string">"wasm32"</span>,
feature = <span class="string">"wasmbind"</span>,
not(any(target_os = <span class="string">"emscripten"</span>, target_os = <span class="string">"wasi"</span>))
))
))]
</span><span class="kw">use </span>std::time::{SystemTime, UNIX_EPOCH};
<span class="attr">#[cfg(feature = <span class="string">"rkyv"</span>)]
</span><span class="kw">use </span>rkyv::{Archive, Deserialize, Serialize};
<span class="kw">use super</span>::{FixedOffset, LocalResult, Offset, TimeZone};
<span class="kw">use </span><span class="kw">crate</span>::naive::{NaiveDate, NaiveDateTime};
<span class="attr">#[cfg(feature = <span class="string">"clock"</span>)]
#[allow(deprecated)]
</span><span class="kw">use crate</span>::{Date, DateTime};
<span class="doccomment">/// The UTC time zone. This is the most efficient time zone when you don't need the local time.
/// It is also used as an offset (which is also a dummy type).
///
/// Using the [`TimeZone`](./trait.TimeZone.html) methods
/// on the UTC struct is the preferred way to construct `DateTime<Utc>`
/// instances.
///
/// # Example
///
/// ```
/// use chrono::{TimeZone, NaiveDateTime, Utc};
///
/// let dt = Utc.from_utc_datetime(&NaiveDateTime::from_timestamp_opt(61, 0).unwrap());
///
/// assert_eq!(Utc.timestamp_opt(61, 0).unwrap(), dt);
/// assert_eq!(Utc.with_ymd_and_hms(1970, 1, 1, 0, 1, 1).unwrap(), dt);
/// ```
</span><span class="attr">#[derive(Copy, Clone, PartialEq, Eq, Hash)]
#[cfg_attr(feature = <span class="string">"rkyv"</span>, derive(Archive, Deserialize, Serialize))]
#[cfg_attr(feature = <span class="string">"arbitrary"</span>, derive(arbitrary::Arbitrary))]
</span><span class="kw">pub struct </span>Utc;
<span class="attr">#[cfg(feature = <span class="string">"clock"</span>)]
#[cfg_attr(docsrs, doc(cfg(feature = <span class="string">"clock"</span>)))]
</span><span class="kw">impl </span>Utc {
<span class="doccomment">/// Returns a `Date` which corresponds to the current date.
</span><span class="attr">#[deprecated(
since = <span class="string">"0.4.23"</span>,
note = <span class="string">"use `Utc::now()` instead, potentially with `.date_naive()`"
</span>)]
#[allow(deprecated)]
#[must_use]
</span><span class="kw">pub fn </span>today() -> Date<Utc> {
Utc::now().date()
}
<span class="doccomment">/// Returns a `DateTime<Utc>` which corresponds to the current date and time in UTC.
///
/// See also the similar [`Local::now()`] which returns `DateTime<Local>`, i.e. the local date
/// and time including offset from UTC.
///
/// [`Local::now()`]: crate::Local::now
///
/// # Example
///
/// ```
/// # #![allow(unused_variables)]
/// # use chrono::{FixedOffset, Utc};
/// // Current time in UTC
/// let now_utc = Utc::now();
///
/// // Current date in UTC
/// let today_utc = now_utc.date_naive();
///
/// // Current time in some timezone (let's use +05:00)
/// let offset = FixedOffset::east_opt(5 * 60 * 60).unwrap();
/// let now_with_offset = Utc::now().with_timezone(&offset);
/// ```
</span><span class="attr">#[cfg(not(all(
target_arch = <span class="string">"wasm32"</span>,
feature = <span class="string">"wasmbind"</span>,
not(any(target_os = <span class="string">"emscripten"</span>, target_os = <span class="string">"wasi"</span>))
)))]
#[must_use]
</span><span class="kw">pub fn </span>now() -> DateTime<Utc> {
<span class="kw">let </span>now =
SystemTime::now().duration_since(UNIX_EPOCH).expect(<span class="string">"system time before Unix epoch"</span>);
<span class="kw">let </span>naive =
NaiveDateTime::from_timestamp_opt(now.as_secs() <span class="kw">as </span>i64, now.subsec_nanos()).unwrap();
Utc.from_utc_datetime(<span class="kw-2">&</span>naive)
}
<span class="doccomment">/// Returns a `DateTime` which corresponds to the current date and time.
</span><span class="attr">#[cfg(all(
target_arch = <span class="string">"wasm32"</span>,
feature = <span class="string">"wasmbind"</span>,
not(any(target_os = <span class="string">"emscripten"</span>, target_os = <span class="string">"wasi"</span>))
))]
#[must_use]
</span><span class="kw">pub fn </span>now() -> DateTime<Utc> {
<span class="kw">let </span>now = js_sys::Date::new_0();
DateTime::<Utc>::from(now)
}
}
<span class="kw">impl </span>TimeZone <span class="kw">for </span>Utc {
<span class="kw">type </span>Offset = Utc;
<span class="kw">fn </span>from_offset(_state: <span class="kw-2">&</span>Utc) -> Utc {
Utc
}
<span class="kw">fn </span>offset_from_local_date(<span class="kw-2">&</span><span class="self">self</span>, _local: <span class="kw-2">&</span>NaiveDate) -> LocalResult<Utc> {
LocalResult::Single(Utc)
}
<span class="kw">fn </span>offset_from_local_datetime(<span class="kw-2">&</span><span class="self">self</span>, _local: <span class="kw-2">&</span>NaiveDateTime) -> LocalResult<Utc> {
LocalResult::Single(Utc)
}
<span class="kw">fn </span>offset_from_utc_date(<span class="kw-2">&</span><span class="self">self</span>, _utc: <span class="kw-2">&</span>NaiveDate) -> Utc {
Utc
}
<span class="kw">fn </span>offset_from_utc_datetime(<span class="kw-2">&</span><span class="self">self</span>, _utc: <span class="kw-2">&</span>NaiveDateTime) -> Utc {
Utc
}
}
<span class="kw">impl </span>Offset <span class="kw">for </span>Utc {
<span class="kw">fn </span>fix(<span class="kw-2">&</span><span class="self">self</span>) -> FixedOffset {
FixedOffset::east_opt(<span class="number">0</span>).unwrap()
}
}
<span class="kw">impl </span>fmt::Debug <span class="kw">for </span>Utc {
<span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>fmt::Formatter) -> fmt::Result {
<span class="macro">write!</span>(f, <span class="string">"Z"</span>)
}
}
<span class="kw">impl </span>fmt::Display <span class="kw">for </span>Utc {
<span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>fmt::Formatter) -> fmt::Result {
<span class="macro">write!</span>(f, <span class="string">"UTC"</span>)
}
}
</code></pre></div>
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