| <!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/date.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>date.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">//! ISO 8601 calendar date with time zone. |
| </span><span class="attribute">#![allow(deprecated)] |
| |
| #[cfg(any(feature = <span class="string">"alloc"</span>, feature = <span class="string">"std"</span>, test))] |
| </span><span class="kw">use </span>core::borrow::Borrow; |
| <span class="kw">use </span>core::cmp::Ordering; |
| <span class="kw">use </span>core::ops::{Add, AddAssign, Sub, SubAssign}; |
| <span class="kw">use </span>core::{fmt, hash}; |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"rkyv"</span>)] |
| </span><span class="kw">use </span>rkyv::{Archive, Deserialize, Serialize}; |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"unstable-locales"</span>)] |
| </span><span class="kw">use </span><span class="kw">crate</span>::format::Locale; |
| <span class="attribute">#[cfg(any(feature = <span class="string">"alloc"</span>, feature = <span class="string">"std"</span>, test))] |
| </span><span class="kw">use </span><span class="kw">crate</span>::format::{DelayedFormat, Item, StrftimeItems}; |
| <span class="kw">use </span><span class="kw">crate</span>::naive::{IsoWeek, NaiveDate, NaiveTime}; |
| <span class="kw">use </span><span class="kw">crate</span>::offset::{TimeZone, Utc}; |
| <span class="kw">use </span><span class="kw">crate</span>::oldtime::Duration <span class="kw">as </span>OldDuration; |
| <span class="kw">use </span><span class="kw">crate</span>::DateTime; |
| <span class="kw">use crate</span>::{Datelike, Weekday}; |
| |
| <span class="doccomment">/// ISO 8601 calendar date with time zone. |
| /// |
| /// You almost certainly want to be using a [`NaiveDate`] instead of this type. |
| /// |
| /// This type primarily exists to aid in the construction of DateTimes that |
| /// have a timezone by way of the [`TimeZone`] datelike constructors (e.g. |
| /// [`TimeZone::ymd`]). |
| /// |
| /// This type should be considered ambiguous at best, due to the inherent lack |
| /// of precision required for the time zone resolution. |
| /// |
| /// There are some guarantees on the usage of `Date<Tz>`: |
| /// |
| /// - If properly constructed via [`TimeZone::ymd`] and others without an error, |
| /// the corresponding local date should exist for at least a moment. |
| /// (It may still have a gap from the offset changes.) |
| /// |
| /// - The `TimeZone` is free to assign *any* [`Offset`](crate::offset::Offset) to the |
| /// local date, as long as that offset did occur in given day. |
| /// |
| /// For example, if `2015-03-08T01:59-08:00` is followed by `2015-03-08T03:00-07:00`, |
| /// it may produce either `2015-03-08-08:00` or `2015-03-08-07:00` |
| /// but *not* `2015-03-08+00:00` and others. |
| /// |
| /// - Once constructed as a full `DateTime`, [`DateTime::date`] and other associated |
| /// methods should return those for the original `Date`. For example, if `dt = |
| /// tz.ymd_opt(y,m,d).unwrap().hms(h,n,s)` were valid, `dt.date() == tz.ymd_opt(y,m,d).unwrap()`. |
| /// |
| /// - The date is timezone-agnostic up to one day (i.e. practically always), |
| /// so the local date and UTC date should be equal for most cases |
| /// even though the raw calculation between `NaiveDate` and `Duration` may not. |
| </span><span class="attribute">#[deprecated(since = <span class="string">"0.4.23"</span>, note = <span class="string">"Use `NaiveDate` or `DateTime<Tz>` instead"</span>)] |
| #[derive(Clone)] |
| #[cfg_attr(feature = <span class="string">"rkyv"</span>, derive(Archive, Deserialize, Serialize))] |
| </span><span class="kw">pub struct </span>Date<Tz: TimeZone> { |
| date: NaiveDate, |
| offset: Tz::Offset, |
| } |
| |
| <span class="doccomment">/// The minimum possible `Date`. |
| </span><span class="attribute">#[allow(deprecated)] |
| #[deprecated(since = <span class="string">"0.4.20"</span>, note = <span class="string">"Use Date::MIN_UTC instead"</span>)] |
| </span><span class="kw">pub const </span>MIN_DATE: Date<Utc> = Date::<Utc>::MIN_UTC; |
| <span class="doccomment">/// The maximum possible `Date`. |
| </span><span class="attribute">#[allow(deprecated)] |
| #[deprecated(since = <span class="string">"0.4.20"</span>, note = <span class="string">"Use Date::MAX_UTC instead"</span>)] |
| </span><span class="kw">pub const </span>MAX_DATE: Date<Utc> = Date::<Utc>::MAX_UTC; |
| |
| <span class="kw">impl</span><Tz: TimeZone> Date<Tz> { |
| <span class="doccomment">/// Makes a new `Date` with given *UTC* date and offset. |
| /// The local date should be constructed via the `TimeZone` trait. |
| </span><span class="comment">// |
| // note: this constructor is purposely not named to `new` to discourage the direct usage. |
| </span><span class="attribute">#[inline] |
| #[must_use] |
| </span><span class="kw">pub fn </span>from_utc(date: NaiveDate, offset: Tz::Offset) -> Date<Tz> { |
| Date { date, offset } |
| } |
| |
| <span class="doccomment">/// Makes a new `DateTime` from the current date and given `NaiveTime`. |
| /// The offset in the current date is preserved. |
| /// |
| /// Panics on invalid datetime. |
| </span><span class="attribute">#[inline] |
| #[must_use] |
| </span><span class="kw">pub fn </span>and_time(<span class="kw-2">&</span><span class="self">self</span>, time: NaiveTime) -> <span class="prelude-ty">Option</span><DateTime<Tz>> { |
| <span class="kw">let </span>localdt = <span class="self">self</span>.naive_local().and_time(time); |
| <span class="self">self</span>.timezone().from_local_datetime(<span class="kw-2">&</span>localdt).single() |
| } |
| |
| <span class="doccomment">/// Makes a new `DateTime` from the current date, hour, minute and second. |
| /// The offset in the current date is preserved. |
| /// |
| /// Panics on invalid hour, minute and/or second. |
| </span><span class="attribute">#[deprecated(since = <span class="string">"0.4.23"</span>, note = <span class="string">"Use and_hms_opt() instead"</span>)] |
| #[inline] |
| #[must_use] |
| </span><span class="kw">pub fn </span>and_hms(<span class="kw-2">&</span><span class="self">self</span>, hour: u32, min: u32, sec: u32) -> DateTime<Tz> { |
| <span class="self">self</span>.and_hms_opt(hour, min, sec).expect(<span class="string">"invalid time"</span>) |
| } |
| |
| <span class="doccomment">/// Makes a new `DateTime` from the current date, hour, minute and second. |
| /// The offset in the current date is preserved. |
| /// |
| /// Returns `None` on invalid hour, minute and/or second. |
| </span><span class="attribute">#[inline] |
| #[must_use] |
| </span><span class="kw">pub fn </span>and_hms_opt(<span class="kw-2">&</span><span class="self">self</span>, hour: u32, min: u32, sec: u32) -> <span class="prelude-ty">Option</span><DateTime<Tz>> { |
| NaiveTime::from_hms_opt(hour, min, sec).and_then(|time| <span class="self">self</span>.and_time(time)) |
| } |
| |
| <span class="doccomment">/// Makes a new `DateTime` from the current date, hour, minute, second and millisecond. |
| /// The millisecond part can exceed 1,000 in order to represent the leap second. |
| /// The offset in the current date is preserved. |
| /// |
| /// Panics on invalid hour, minute, second and/or millisecond. |
| </span><span class="attribute">#[deprecated(since = <span class="string">"0.4.23"</span>, note = <span class="string">"Use and_hms_milli_opt() instead"</span>)] |
| #[inline] |
| #[must_use] |
| </span><span class="kw">pub fn </span>and_hms_milli(<span class="kw-2">&</span><span class="self">self</span>, hour: u32, min: u32, sec: u32, milli: u32) -> DateTime<Tz> { |
| <span class="self">self</span>.and_hms_milli_opt(hour, min, sec, milli).expect(<span class="string">"invalid time"</span>) |
| } |
| |
| <span class="doccomment">/// Makes a new `DateTime` from the current date, hour, minute, second and millisecond. |
| /// The millisecond part can exceed 1,000 in order to represent the leap second. |
| /// The offset in the current date is preserved. |
| /// |
| /// Returns `None` on invalid hour, minute, second and/or millisecond. |
| </span><span class="attribute">#[inline] |
| #[must_use] |
| </span><span class="kw">pub fn </span>and_hms_milli_opt( |
| <span class="kw-2">&</span><span class="self">self</span>, |
| hour: u32, |
| min: u32, |
| sec: u32, |
| milli: u32, |
| ) -> <span class="prelude-ty">Option</span><DateTime<Tz>> { |
| NaiveTime::from_hms_milli_opt(hour, min, sec, milli).and_then(|time| <span class="self">self</span>.and_time(time)) |
| } |
| |
| <span class="doccomment">/// Makes a new `DateTime` from the current date, hour, minute, second and microsecond. |
| /// The microsecond part can exceed 1,000,000 in order to represent the leap second. |
| /// The offset in the current date is preserved. |
| /// |
| /// Panics on invalid hour, minute, second and/or microsecond. |
| </span><span class="attribute">#[deprecated(since = <span class="string">"0.4.23"</span>, note = <span class="string">"Use and_hms_micro_opt() instead"</span>)] |
| #[inline] |
| #[must_use] |
| </span><span class="kw">pub fn </span>and_hms_micro(<span class="kw-2">&</span><span class="self">self</span>, hour: u32, min: u32, sec: u32, micro: u32) -> DateTime<Tz> { |
| <span class="self">self</span>.and_hms_micro_opt(hour, min, sec, micro).expect(<span class="string">"invalid time"</span>) |
| } |
| |
| <span class="doccomment">/// Makes a new `DateTime` from the current date, hour, minute, second and microsecond. |
| /// The microsecond part can exceed 1,000,000 in order to represent the leap second. |
| /// The offset in the current date is preserved. |
| /// |
| /// Returns `None` on invalid hour, minute, second and/or microsecond. |
| </span><span class="attribute">#[inline] |
| #[must_use] |
| </span><span class="kw">pub fn </span>and_hms_micro_opt( |
| <span class="kw-2">&</span><span class="self">self</span>, |
| hour: u32, |
| min: u32, |
| sec: u32, |
| micro: u32, |
| ) -> <span class="prelude-ty">Option</span><DateTime<Tz>> { |
| NaiveTime::from_hms_micro_opt(hour, min, sec, micro).and_then(|time| <span class="self">self</span>.and_time(time)) |
| } |
| |
| <span class="doccomment">/// Makes a new `DateTime` from the current date, hour, minute, second and nanosecond. |
| /// The nanosecond part can exceed 1,000,000,000 in order to represent the leap second. |
| /// The offset in the current date is preserved. |
| /// |
| /// Panics on invalid hour, minute, second and/or nanosecond. |
| </span><span class="attribute">#[deprecated(since = <span class="string">"0.4.23"</span>, note = <span class="string">"Use and_hms_nano_opt() instead"</span>)] |
| #[inline] |
| #[must_use] |
| </span><span class="kw">pub fn </span>and_hms_nano(<span class="kw-2">&</span><span class="self">self</span>, hour: u32, min: u32, sec: u32, nano: u32) -> DateTime<Tz> { |
| <span class="self">self</span>.and_hms_nano_opt(hour, min, sec, nano).expect(<span class="string">"invalid time"</span>) |
| } |
| |
| <span class="doccomment">/// Makes a new `DateTime` from the current date, hour, minute, second and nanosecond. |
| /// The nanosecond part can exceed 1,000,000,000 in order to represent the leap second. |
| /// The offset in the current date is preserved. |
| /// |
| /// Returns `None` on invalid hour, minute, second and/or nanosecond. |
| </span><span class="attribute">#[inline] |
| #[must_use] |
| </span><span class="kw">pub fn </span>and_hms_nano_opt( |
| <span class="kw-2">&</span><span class="self">self</span>, |
| hour: u32, |
| min: u32, |
| sec: u32, |
| nano: u32, |
| ) -> <span class="prelude-ty">Option</span><DateTime<Tz>> { |
| NaiveTime::from_hms_nano_opt(hour, min, sec, nano).and_then(|time| <span class="self">self</span>.and_time(time)) |
| } |
| |
| <span class="doccomment">/// Makes a new `Date` for the next date. |
| /// |
| /// Panics when `self` is the last representable date. |
| </span><span class="attribute">#[deprecated(since = <span class="string">"0.4.23"</span>, note = <span class="string">"Use succ_opt() instead"</span>)] |
| #[inline] |
| #[must_use] |
| </span><span class="kw">pub fn </span>succ(<span class="kw-2">&</span><span class="self">self</span>) -> Date<Tz> { |
| <span class="self">self</span>.succ_opt().expect(<span class="string">"out of bound"</span>) |
| } |
| |
| <span class="doccomment">/// Makes a new `Date` for the next date. |
| /// |
| /// Returns `None` when `self` is the last representable date. |
| </span><span class="attribute">#[inline] |
| #[must_use] |
| </span><span class="kw">pub fn </span>succ_opt(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><Date<Tz>> { |
| <span class="self">self</span>.date.succ_opt().map(|date| Date::from_utc(date, <span class="self">self</span>.offset.clone())) |
| } |
| |
| <span class="doccomment">/// Makes a new `Date` for the prior date. |
| /// |
| /// Panics when `self` is the first representable date. |
| </span><span class="attribute">#[deprecated(since = <span class="string">"0.4.23"</span>, note = <span class="string">"Use pred_opt() instead"</span>)] |
| #[inline] |
| #[must_use] |
| </span><span class="kw">pub fn </span>pred(<span class="kw-2">&</span><span class="self">self</span>) -> Date<Tz> { |
| <span class="self">self</span>.pred_opt().expect(<span class="string">"out of bound"</span>) |
| } |
| |
| <span class="doccomment">/// Makes a new `Date` for the prior date. |
| /// |
| /// Returns `None` when `self` is the first representable date. |
| </span><span class="attribute">#[inline] |
| #[must_use] |
| </span><span class="kw">pub fn </span>pred_opt(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><Date<Tz>> { |
| <span class="self">self</span>.date.pred_opt().map(|date| Date::from_utc(date, <span class="self">self</span>.offset.clone())) |
| } |
| |
| <span class="doccomment">/// Retrieves an associated offset from UTC. |
| </span><span class="attribute">#[inline] |
| #[must_use] |
| </span><span class="kw">pub fn </span>offset(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span>Tz::Offset { |
| <span class="kw-2">&</span><span class="self">self</span>.offset |
| } |
| |
| <span class="doccomment">/// Retrieves an associated time zone. |
| </span><span class="attribute">#[inline] |
| #[must_use] |
| </span><span class="kw">pub fn </span>timezone(<span class="kw-2">&</span><span class="self">self</span>) -> Tz { |
| TimeZone::from_offset(<span class="kw-2">&</span><span class="self">self</span>.offset) |
| } |
| |
| <span class="doccomment">/// Changes the associated time zone. |
| /// This does not change the actual `Date` (but will change the string representation). |
| </span><span class="attribute">#[inline] |
| #[must_use] |
| </span><span class="kw">pub fn </span>with_timezone<Tz2: TimeZone>(<span class="kw-2">&</span><span class="self">self</span>, tz: <span class="kw-2">&</span>Tz2) -> Date<Tz2> { |
| tz.from_utc_date(<span class="kw-2">&</span><span class="self">self</span>.date) |
| } |
| |
| <span class="doccomment">/// Adds given `Duration` to the current date. |
| /// |
| /// Returns `None` when it will result in overflow. |
| </span><span class="attribute">#[inline] |
| #[must_use] |
| </span><span class="kw">pub fn </span>checked_add_signed(<span class="self">self</span>, rhs: OldDuration) -> <span class="prelude-ty">Option</span><Date<Tz>> { |
| <span class="kw">let </span>date = <span class="self">self</span>.date.checked_add_signed(rhs)<span class="question-mark">?</span>; |
| <span class="prelude-val">Some</span>(Date { date, offset: <span class="self">self</span>.offset }) |
| } |
| |
| <span class="doccomment">/// Subtracts given `Duration` from the current date. |
| /// |
| /// Returns `None` when it will result in overflow. |
| </span><span class="attribute">#[inline] |
| #[must_use] |
| </span><span class="kw">pub fn </span>checked_sub_signed(<span class="self">self</span>, rhs: OldDuration) -> <span class="prelude-ty">Option</span><Date<Tz>> { |
| <span class="kw">let </span>date = <span class="self">self</span>.date.checked_sub_signed(rhs)<span class="question-mark">?</span>; |
| <span class="prelude-val">Some</span>(Date { date, offset: <span class="self">self</span>.offset }) |
| } |
| |
| <span class="doccomment">/// Subtracts another `Date` from the current date. |
| /// Returns a `Duration` of integral numbers. |
| /// |
| /// This does not overflow or underflow at all, |
| /// as all possible output fits in the range of `Duration`. |
| </span><span class="attribute">#[inline] |
| #[must_use] |
| </span><span class="kw">pub fn </span>signed_duration_since<Tz2: TimeZone>(<span class="self">self</span>, rhs: Date<Tz2>) -> OldDuration { |
| <span class="self">self</span>.date.signed_duration_since(rhs.date) |
| } |
| |
| <span class="doccomment">/// Returns a view to the naive UTC date. |
| </span><span class="attribute">#[inline] |
| #[must_use] |
| </span><span class="kw">pub fn </span>naive_utc(<span class="kw-2">&</span><span class="self">self</span>) -> NaiveDate { |
| <span class="self">self</span>.date |
| } |
| |
| <span class="doccomment">/// Returns a view to the naive local date. |
| /// |
| /// This is technically the same as [`naive_utc`](#method.naive_utc) |
| /// because the offset is restricted to never exceed one day, |
| /// but provided for the consistency. |
| </span><span class="attribute">#[inline] |
| #[must_use] |
| </span><span class="kw">pub fn </span>naive_local(<span class="kw-2">&</span><span class="self">self</span>) -> NaiveDate { |
| <span class="self">self</span>.date |
| } |
| |
| <span class="doccomment">/// Returns the number of whole years from the given `base` until `self`. |
| </span><span class="attribute">#[must_use] |
| </span><span class="kw">pub fn </span>years_since(<span class="kw-2">&</span><span class="self">self</span>, base: <span class="self">Self</span>) -> <span class="prelude-ty">Option</span><u32> { |
| <span class="self">self</span>.date.years_since(base.date) |
| } |
| |
| <span class="doccomment">/// The minimum possible `Date`. |
| </span><span class="kw">pub const </span>MIN_UTC: Date<Utc> = Date { date: NaiveDate::MIN, offset: Utc }; |
| <span class="doccomment">/// The maximum possible `Date`. |
| </span><span class="kw">pub const </span>MAX_UTC: Date<Utc> = Date { date: NaiveDate::MAX, offset: Utc }; |
| } |
| |
| <span class="doccomment">/// Maps the local date to other date with given conversion function. |
| </span><span class="kw">fn </span>map_local<Tz: TimeZone, F>(d: <span class="kw-2">&</span>Date<Tz>, <span class="kw-2">mut </span>f: F) -> <span class="prelude-ty">Option</span><Date<Tz>> |
| <span class="kw">where |
| </span>F: FnMut(NaiveDate) -> <span class="prelude-ty">Option</span><NaiveDate>, |
| { |
| f(d.naive_local()).and_then(|date| d.timezone().from_local_date(<span class="kw-2">&</span>date).single()) |
| } |
| |
| <span class="kw">impl</span><Tz: TimeZone> Date<Tz> |
| <span class="kw">where |
| </span>Tz::Offset: fmt::Display, |
| { |
| <span class="doccomment">/// Formats the date with the specified formatting items. |
| </span><span class="attribute">#[cfg(any(feature = <span class="string">"alloc"</span>, feature = <span class="string">"std"</span>, test))] |
| #[cfg_attr(docsrs, doc(cfg(any(feature = <span class="string">"alloc"</span>, feature = <span class="string">"std"</span>))))] |
| #[inline] |
| #[must_use] |
| </span><span class="kw">pub fn </span>format_with_items<<span class="lifetime">'a</span>, I, B>(<span class="kw-2">&</span><span class="self">self</span>, items: I) -> DelayedFormat<I> |
| <span class="kw">where |
| </span>I: Iterator<Item = B> + Clone, |
| B: Borrow<Item<<span class="lifetime">'a</span>>>, |
| { |
| DelayedFormat::new_with_offset(<span class="prelude-val">Some</span>(<span class="self">self</span>.naive_local()), <span class="prelude-val">None</span>, <span class="kw-2">&</span><span class="self">self</span>.offset, items) |
| } |
| |
| <span class="doccomment">/// Formats the date with the specified format string. |
| /// See the [`crate::format::strftime`] module |
| /// on the supported escape sequences. |
| </span><span class="attribute">#[cfg(any(feature = <span class="string">"alloc"</span>, feature = <span class="string">"std"</span>, test))] |
| #[cfg_attr(docsrs, doc(cfg(any(feature = <span class="string">"alloc"</span>, feature = <span class="string">"std"</span>))))] |
| #[inline] |
| #[must_use] |
| </span><span class="kw">pub fn </span>format<<span class="lifetime">'a</span>>(<span class="kw-2">&</span><span class="self">self</span>, fmt: <span class="kw-2">&</span><span class="lifetime">'a </span>str) -> DelayedFormat<StrftimeItems<<span class="lifetime">'a</span>>> { |
| <span class="self">self</span>.format_with_items(StrftimeItems::new(fmt)) |
| } |
| |
| <span class="doccomment">/// Formats the date with the specified formatting items and locale. |
| </span><span class="attribute">#[cfg(feature = <span class="string">"unstable-locales"</span>)] |
| #[cfg_attr(docsrs, doc(cfg(feature = <span class="string">"unstable-locales"</span>)))] |
| #[inline] |
| #[must_use] |
| </span><span class="kw">pub fn </span>format_localized_with_items<<span class="lifetime">'a</span>, I, B>( |
| <span class="kw-2">&</span><span class="self">self</span>, |
| items: I, |
| locale: Locale, |
| ) -> DelayedFormat<I> |
| <span class="kw">where |
| </span>I: Iterator<Item = B> + Clone, |
| B: Borrow<Item<<span class="lifetime">'a</span>>>, |
| { |
| DelayedFormat::new_with_offset_and_locale( |
| <span class="prelude-val">Some</span>(<span class="self">self</span>.naive_local()), |
| <span class="prelude-val">None</span>, |
| <span class="kw-2">&</span><span class="self">self</span>.offset, |
| items, |
| locale, |
| ) |
| } |
| |
| <span class="doccomment">/// Formats the date with the specified format string and locale. |
| /// See the [`crate::format::strftime`] module |
| /// on the supported escape sequences. |
| </span><span class="attribute">#[cfg(feature = <span class="string">"unstable-locales"</span>)] |
| #[cfg_attr(docsrs, doc(cfg(feature = <span class="string">"unstable-locales"</span>)))] |
| #[inline] |
| #[must_use] |
| </span><span class="kw">pub fn </span>format_localized<<span class="lifetime">'a</span>>( |
| <span class="kw-2">&</span><span class="self">self</span>, |
| fmt: <span class="kw-2">&</span><span class="lifetime">'a </span>str, |
| locale: Locale, |
| ) -> DelayedFormat<StrftimeItems<<span class="lifetime">'a</span>>> { |
| <span class="self">self</span>.format_localized_with_items(StrftimeItems::new_with_locale(fmt, locale), locale) |
| } |
| } |
| |
| <span class="kw">impl</span><Tz: TimeZone> Datelike <span class="kw">for </span>Date<Tz> { |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>year(<span class="kw-2">&</span><span class="self">self</span>) -> i32 { |
| <span class="self">self</span>.naive_local().year() |
| } |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>month(<span class="kw-2">&</span><span class="self">self</span>) -> u32 { |
| <span class="self">self</span>.naive_local().month() |
| } |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>month0(<span class="kw-2">&</span><span class="self">self</span>) -> u32 { |
| <span class="self">self</span>.naive_local().month0() |
| } |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>day(<span class="kw-2">&</span><span class="self">self</span>) -> u32 { |
| <span class="self">self</span>.naive_local().day() |
| } |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>day0(<span class="kw-2">&</span><span class="self">self</span>) -> u32 { |
| <span class="self">self</span>.naive_local().day0() |
| } |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>ordinal(<span class="kw-2">&</span><span class="self">self</span>) -> u32 { |
| <span class="self">self</span>.naive_local().ordinal() |
| } |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>ordinal0(<span class="kw-2">&</span><span class="self">self</span>) -> u32 { |
| <span class="self">self</span>.naive_local().ordinal0() |
| } |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>weekday(<span class="kw-2">&</span><span class="self">self</span>) -> Weekday { |
| <span class="self">self</span>.naive_local().weekday() |
| } |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>iso_week(<span class="kw-2">&</span><span class="self">self</span>) -> IsoWeek { |
| <span class="self">self</span>.naive_local().iso_week() |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>with_year(<span class="kw-2">&</span><span class="self">self</span>, year: i32) -> <span class="prelude-ty">Option</span><Date<Tz>> { |
| map_local(<span class="self">self</span>, |date| date.with_year(year)) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>with_month(<span class="kw-2">&</span><span class="self">self</span>, month: u32) -> <span class="prelude-ty">Option</span><Date<Tz>> { |
| map_local(<span class="self">self</span>, |date| date.with_month(month)) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>with_month0(<span class="kw-2">&</span><span class="self">self</span>, month0: u32) -> <span class="prelude-ty">Option</span><Date<Tz>> { |
| map_local(<span class="self">self</span>, |date| date.with_month0(month0)) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>with_day(<span class="kw-2">&</span><span class="self">self</span>, day: u32) -> <span class="prelude-ty">Option</span><Date<Tz>> { |
| map_local(<span class="self">self</span>, |date| date.with_day(day)) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>with_day0(<span class="kw-2">&</span><span class="self">self</span>, day0: u32) -> <span class="prelude-ty">Option</span><Date<Tz>> { |
| map_local(<span class="self">self</span>, |date| date.with_day0(day0)) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>with_ordinal(<span class="kw-2">&</span><span class="self">self</span>, ordinal: u32) -> <span class="prelude-ty">Option</span><Date<Tz>> { |
| map_local(<span class="self">self</span>, |date| date.with_ordinal(ordinal)) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>with_ordinal0(<span class="kw-2">&</span><span class="self">self</span>, ordinal0: u32) -> <span class="prelude-ty">Option</span><Date<Tz>> { |
| map_local(<span class="self">self</span>, |date| date.with_ordinal0(ordinal0)) |
| } |
| } |
| |
| <span class="comment">// we need them as automatic impls cannot handle associated types |
| </span><span class="kw">impl</span><Tz: TimeZone> Copy <span class="kw">for </span>Date<Tz> <span class="kw">where </span><Tz <span class="kw">as </span>TimeZone>::Offset: Copy {} |
| <span class="kw">unsafe impl</span><Tz: TimeZone> Send <span class="kw">for </span>Date<Tz> <span class="kw">where </span><Tz <span class="kw">as </span>TimeZone>::Offset: Send {} |
| |
| <span class="kw">impl</span><Tz: TimeZone, Tz2: TimeZone> PartialEq<Date<Tz2>> <span class="kw">for </span>Date<Tz> { |
| <span class="kw">fn </span>eq(<span class="kw-2">&</span><span class="self">self</span>, other: <span class="kw-2">&</span>Date<Tz2>) -> bool { |
| <span class="self">self</span>.date == other.date |
| } |
| } |
| |
| <span class="kw">impl</span><Tz: TimeZone> Eq <span class="kw">for </span>Date<Tz> {} |
| |
| <span class="kw">impl</span><Tz: TimeZone> PartialOrd <span class="kw">for </span>Date<Tz> { |
| <span class="kw">fn </span>partial_cmp(<span class="kw-2">&</span><span class="self">self</span>, other: <span class="kw-2">&</span>Date<Tz>) -> <span class="prelude-ty">Option</span><Ordering> { |
| <span class="self">self</span>.date.partial_cmp(<span class="kw-2">&</span>other.date) |
| } |
| } |
| |
| <span class="kw">impl</span><Tz: TimeZone> Ord <span class="kw">for </span>Date<Tz> { |
| <span class="kw">fn </span>cmp(<span class="kw-2">&</span><span class="self">self</span>, other: <span class="kw-2">&</span>Date<Tz>) -> Ordering { |
| <span class="self">self</span>.date.cmp(<span class="kw-2">&</span>other.date) |
| } |
| } |
| |
| <span class="kw">impl</span><Tz: TimeZone> hash::Hash <span class="kw">for </span>Date<Tz> { |
| <span class="kw">fn </span>hash<H: hash::Hasher>(<span class="kw-2">&</span><span class="self">self</span>, state: <span class="kw-2">&mut </span>H) { |
| <span class="self">self</span>.date.hash(state) |
| } |
| } |
| |
| <span class="kw">impl</span><Tz: TimeZone> Add<OldDuration> <span class="kw">for </span>Date<Tz> { |
| <span class="kw">type </span>Output = Date<Tz>; |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>add(<span class="self">self</span>, rhs: OldDuration) -> Date<Tz> { |
| <span class="self">self</span>.checked_add_signed(rhs).expect(<span class="string">"`Date + Duration` overflowed"</span>) |
| } |
| } |
| |
| <span class="kw">impl</span><Tz: TimeZone> AddAssign<OldDuration> <span class="kw">for </span>Date<Tz> { |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>add_assign(<span class="kw-2">&mut </span><span class="self">self</span>, rhs: OldDuration) { |
| <span class="self">self</span>.date = <span class="self">self</span>.date.checked_add_signed(rhs).expect(<span class="string">"`Date + Duration` overflowed"</span>); |
| } |
| } |
| |
| <span class="kw">impl</span><Tz: TimeZone> Sub<OldDuration> <span class="kw">for </span>Date<Tz> { |
| <span class="kw">type </span>Output = Date<Tz>; |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>sub(<span class="self">self</span>, rhs: OldDuration) -> Date<Tz> { |
| <span class="self">self</span>.checked_sub_signed(rhs).expect(<span class="string">"`Date - Duration` overflowed"</span>) |
| } |
| } |
| |
| <span class="kw">impl</span><Tz: TimeZone> SubAssign<OldDuration> <span class="kw">for </span>Date<Tz> { |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>sub_assign(<span class="kw-2">&mut </span><span class="self">self</span>, rhs: OldDuration) { |
| <span class="self">self</span>.date = <span class="self">self</span>.date.checked_sub_signed(rhs).expect(<span class="string">"`Date - Duration` overflowed"</span>); |
| } |
| } |
| |
| <span class="kw">impl</span><Tz: TimeZone> Sub<Date<Tz>> <span class="kw">for </span>Date<Tz> { |
| <span class="kw">type </span>Output = OldDuration; |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>sub(<span class="self">self</span>, rhs: Date<Tz>) -> OldDuration { |
| <span class="self">self</span>.signed_duration_since(rhs) |
| } |
| } |
| |
| <span class="kw">impl</span><Tz: TimeZone> fmt::Debug <span class="kw">for </span>Date<Tz> { |
| <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="self">self</span>.naive_local().fmt(f)<span class="question-mark">?</span>; |
| <span class="self">self</span>.offset.fmt(f) |
| } |
| } |
| |
| <span class="kw">impl</span><Tz: TimeZone> fmt::Display <span class="kw">for </span>Date<Tz> |
| <span class="kw">where |
| </span>Tz::Offset: fmt::Display, |
| { |
| <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="self">self</span>.naive_local().fmt(f)<span class="question-mark">?</span>; |
| <span class="self">self</span>.offset.fmt(f) |
| } |
| } |
| |
| <span class="comment">// Note that implementation of Arbitrary cannot be automatically derived for Date<Tz>, due to |
| // the nontrivial bound <Tz as TimeZone>::Offset: Arbitrary. |
| </span><span class="attribute">#[cfg(feature = <span class="string">"arbitrary"</span>)] |
| </span><span class="kw">impl</span><<span class="lifetime">'a</span>, Tz> arbitrary::Arbitrary<<span class="lifetime">'a</span>> <span class="kw">for </span>Date<Tz> |
| <span class="kw">where |
| </span>Tz: TimeZone, |
| <Tz <span class="kw">as </span>TimeZone>::Offset: arbitrary::Arbitrary<<span class="lifetime">'a</span>>, |
| { |
| <span class="kw">fn </span>arbitrary(u: <span class="kw-2">&mut </span>arbitrary::Unstructured<<span class="lifetime">'a</span>>) -> arbitrary::Result<Date<Tz>> { |
| <span class="kw">let </span>date = NaiveDate::arbitrary(u)<span class="question-mark">?</span>; |
| <span class="kw">let </span>offset = <Tz <span class="kw">as </span>TimeZone>::Offset::arbitrary(u)<span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>(Date::from_utc(date, offset)) |
| } |
| } |
| |
| <span class="attribute">#[cfg(test)] |
| </span><span class="kw">mod </span>tests { |
| <span class="kw">use </span><span class="kw">super</span>::Date; |
| |
| <span class="kw">use </span><span class="kw">crate</span>::oldtime::Duration; |
| <span class="kw">use crate</span>::{FixedOffset, NaiveDate, Utc}; |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"clock"</span>)] |
| </span><span class="kw">use </span><span class="kw">crate</span>::offset::{Local, TimeZone}; |
| |
| <span class="attribute">#[test] |
| #[cfg(feature = <span class="string">"clock"</span>)] |
| </span><span class="kw">fn </span>test_years_elapsed() { |
| <span class="kw">const </span>WEEKS_PER_YEAR: f32 = <span class="number">52.1775</span>; |
| |
| <span class="comment">// This is always at least one year because 1 year = 52.1775 weeks. |
| </span><span class="kw">let </span>one_year_ago = Utc::today() - Duration::weeks((WEEKS_PER_YEAR * <span class="number">1.5</span>).ceil() <span class="kw">as </span>i64); |
| <span class="comment">// A bit more than 2 years. |
| </span><span class="kw">let </span>two_year_ago = Utc::today() - Duration::weeks((WEEKS_PER_YEAR * <span class="number">2.5</span>).ceil() <span class="kw">as </span>i64); |
| |
| <span class="macro">assert_eq!</span>(Utc::today().years_since(one_year_ago), <span class="prelude-val">Some</span>(<span class="number">1</span>)); |
| <span class="macro">assert_eq!</span>(Utc::today().years_since(two_year_ago), <span class="prelude-val">Some</span>(<span class="number">2</span>)); |
| |
| <span class="comment">// If the given DateTime is later than now, the function will always return 0. |
| </span><span class="kw">let </span>future = Utc::today() + Duration::weeks(<span class="number">12</span>); |
| <span class="macro">assert_eq!</span>(Utc::today().years_since(future), <span class="prelude-val">None</span>); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_date_add_assign() { |
| <span class="kw">let </span>naivedate = NaiveDate::from_ymd_opt(<span class="number">2000</span>, <span class="number">1</span>, <span class="number">1</span>).unwrap(); |
| <span class="kw">let </span>date = Date::<Utc>::from_utc(naivedate, Utc); |
| <span class="kw">let </span><span class="kw-2">mut </span>date_add = date; |
| |
| date_add += Duration::days(<span class="number">5</span>); |
| <span class="macro">assert_eq!</span>(date_add, date + Duration::days(<span class="number">5</span>)); |
| |
| <span class="kw">let </span>timezone = FixedOffset::east_opt(<span class="number">60 </span>* <span class="number">60</span>).unwrap(); |
| <span class="kw">let </span>date = date.with_timezone(<span class="kw-2">&</span>timezone); |
| <span class="kw">let </span>date_add = date_add.with_timezone(<span class="kw-2">&</span>timezone); |
| |
| <span class="macro">assert_eq!</span>(date_add, date + Duration::days(<span class="number">5</span>)); |
| |
| <span class="kw">let </span>timezone = FixedOffset::west_opt(<span class="number">2 </span>* <span class="number">60 </span>* <span class="number">60</span>).unwrap(); |
| <span class="kw">let </span>date = date.with_timezone(<span class="kw-2">&</span>timezone); |
| <span class="kw">let </span>date_add = date_add.with_timezone(<span class="kw-2">&</span>timezone); |
| |
| <span class="macro">assert_eq!</span>(date_add, date + Duration::days(<span class="number">5</span>)); |
| } |
| |
| <span class="attribute">#[test] |
| #[cfg(feature = <span class="string">"clock"</span>)] |
| </span><span class="kw">fn </span>test_date_add_assign_local() { |
| <span class="kw">let </span>naivedate = NaiveDate::from_ymd_opt(<span class="number">2000</span>, <span class="number">1</span>, <span class="number">1</span>).unwrap(); |
| |
| <span class="kw">let </span>date = Local.from_utc_date(<span class="kw-2">&</span>naivedate); |
| <span class="kw">let </span><span class="kw-2">mut </span>date_add = date; |
| |
| date_add += Duration::days(<span class="number">5</span>); |
| <span class="macro">assert_eq!</span>(date_add, date + Duration::days(<span class="number">5</span>)); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_date_sub_assign() { |
| <span class="kw">let </span>naivedate = NaiveDate::from_ymd_opt(<span class="number">2000</span>, <span class="number">1</span>, <span class="number">1</span>).unwrap(); |
| <span class="kw">let </span>date = Date::<Utc>::from_utc(naivedate, Utc); |
| <span class="kw">let </span><span class="kw-2">mut </span>date_sub = date; |
| |
| date_sub -= Duration::days(<span class="number">5</span>); |
| <span class="macro">assert_eq!</span>(date_sub, date - Duration::days(<span class="number">5</span>)); |
| |
| <span class="kw">let </span>timezone = FixedOffset::east_opt(<span class="number">60 </span>* <span class="number">60</span>).unwrap(); |
| <span class="kw">let </span>date = date.with_timezone(<span class="kw-2">&</span>timezone); |
| <span class="kw">let </span>date_sub = date_sub.with_timezone(<span class="kw-2">&</span>timezone); |
| |
| <span class="macro">assert_eq!</span>(date_sub, date - Duration::days(<span class="number">5</span>)); |
| |
| <span class="kw">let </span>timezone = FixedOffset::west_opt(<span class="number">2 </span>* <span class="number">60 </span>* <span class="number">60</span>).unwrap(); |
| <span class="kw">let </span>date = date.with_timezone(<span class="kw-2">&</span>timezone); |
| <span class="kw">let </span>date_sub = date_sub.with_timezone(<span class="kw-2">&</span>timezone); |
| |
| <span class="macro">assert_eq!</span>(date_sub, date - Duration::days(<span class="number">5</span>)); |
| } |
| |
| <span class="attribute">#[test] |
| #[cfg(feature = <span class="string">"clock"</span>)] |
| </span><span class="kw">fn </span>test_date_sub_assign_local() { |
| <span class="kw">let </span>naivedate = NaiveDate::from_ymd_opt(<span class="number">2000</span>, <span class="number">1</span>, <span class="number">1</span>).unwrap(); |
| |
| <span class="kw">let </span>date = Local.from_utc_date(<span class="kw-2">&</span>naivedate); |
| <span class="kw">let </span><span class="kw-2">mut </span>date_sub = date; |
| |
| date_sub -= Duration::days(<span class="number">5</span>); |
| <span class="macro">assert_eq!</span>(date_sub, date - Duration::days(<span class="number">5</span>)); |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="chrono" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |