| <!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `/root/.cargo/registry/src/github.com-1ecc6299db9ec823/chrono-0.4.26/src/offset/utc.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>utc.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" href="../../../normalize.css"><link rel="stylesheet" href="../../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../../ayu.css" disabled><link rel="stylesheet" href="../../../dark.css" disabled><link rel="stylesheet" href="../../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../../storage.js"></script><script defer src="../../../source-script.js"></script><script defer src="../../../source-files.js"></script><script defer src="../../../main.js"></script><noscript><link rel="stylesheet" href="../../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../../favicon.svg"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><a class="sidebar-logo" href="../../../chrono/index.html"><div class="logo-container"><img class="rust-logo" src="../../../rust-logo.svg" alt="logo"></div></a></nav><main><div class="width-limiter"><nav class="sub"><a class="sub-logo-container" href="../../../chrono/index.html"><img class="rust-logo" src="../../../rust-logo.svg" alt="logo"></a><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-line-numbers"><span id="1">1</span> |
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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="attribute">#[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="attribute">#[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="attribute">#[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::{DateTime, TimeZone, NaiveDateTime, Utc}; |
| /// |
| /// let dt = DateTime::<Utc>::from_utc(NaiveDateTime::from_timestamp_opt(61, 0).unwrap(), Utc); |
| /// |
| /// 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="attribute">#[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="attribute">#[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="attribute">#[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` which corresponds to the current date and time. |
| </span><span class="attribute">#[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(); |
| DateTime::from_utc(naive, Utc) |
| } |
| |
| <span class="doccomment">/// Returns a `DateTime` which corresponds to the current date and time. |
| </span><span class="attribute">#[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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