| <!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/month.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>month.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="kw">use </span>core::fmt; |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"rkyv"</span>)] |
| </span><span class="kw">use </span>rkyv::{Archive, Deserialize, Serialize}; |
| |
| <span class="kw">use </span><span class="kw">crate</span>::OutOfRange; |
| |
| <span class="doccomment">/// The month of the year. |
| /// |
| /// This enum is just a convenience implementation. |
| /// The month in dates created by DateLike objects does not return this enum. |
| /// |
| /// It is possible to convert from a date to a month independently |
| /// ``` |
| /// use chrono::prelude::*; |
| /// let date = Utc.with_ymd_and_hms(2019, 10, 28, 9, 10, 11).unwrap(); |
| /// // `2019-10-28T09:10:11Z` |
| /// let month = Month::try_from(u8::try_from(date.month()).unwrap()).ok(); |
| /// assert_eq!(month, Some(Month::October)) |
| /// ``` |
| /// Or from a Month to an integer usable by dates |
| /// ``` |
| /// # use chrono::prelude::*; |
| /// let month = Month::January; |
| /// let dt = Utc.with_ymd_and_hms(2019, month.number_from_month(), 28, 9, 10, 11).unwrap(); |
| /// assert_eq!((dt.year(), dt.month(), dt.day()), (2019, 1, 28)); |
| /// ``` |
| /// Allows mapping from and to month, from 1-January to 12-December. |
| /// Can be Serialized/Deserialized with serde |
| </span><span class="comment">// Actual implementation is zero-indexed, API intended as 1-indexed for more intuitive behavior. |
| </span><span class="attribute">#[derive(PartialEq, Eq, Copy, Clone, Debug, Hash, PartialOrd)] |
| #[cfg_attr(feature = <span class="string">"rustc-serialize"</span>, derive(RustcEncodable, RustcDecodable))] |
| #[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 enum </span>Month { |
| <span class="doccomment">/// January |
| </span>January = <span class="number">0</span>, |
| <span class="doccomment">/// February |
| </span>February = <span class="number">1</span>, |
| <span class="doccomment">/// March |
| </span>March = <span class="number">2</span>, |
| <span class="doccomment">/// April |
| </span>April = <span class="number">3</span>, |
| <span class="doccomment">/// May |
| </span>May = <span class="number">4</span>, |
| <span class="doccomment">/// June |
| </span>June = <span class="number">5</span>, |
| <span class="doccomment">/// July |
| </span>July = <span class="number">6</span>, |
| <span class="doccomment">/// August |
| </span>August = <span class="number">7</span>, |
| <span class="doccomment">/// September |
| </span>September = <span class="number">8</span>, |
| <span class="doccomment">/// October |
| </span>October = <span class="number">9</span>, |
| <span class="doccomment">/// November |
| </span>November = <span class="number">10</span>, |
| <span class="doccomment">/// December |
| </span>December = <span class="number">11</span>, |
| } |
| |
| <span class="kw">impl </span>Month { |
| <span class="doccomment">/// The next month. |
| /// |
| /// `m`: | `January` | `February` | `...` | `December` |
| /// ----------- | --------- | ---------- | --- | --------- |
| /// `m.succ()`: | `February` | `March` | `...` | `January` |
| </span><span class="attribute">#[inline] |
| #[must_use] |
| </span><span class="kw">pub const fn </span>succ(<span class="kw-2">&</span><span class="self">self</span>) -> Month { |
| <span class="kw">match </span><span class="kw-2">*</span><span class="self">self </span>{ |
| Month::January => Month::February, |
| Month::February => Month::March, |
| Month::March => Month::April, |
| Month::April => Month::May, |
| Month::May => Month::June, |
| Month::June => Month::July, |
| Month::July => Month::August, |
| Month::August => Month::September, |
| Month::September => Month::October, |
| Month::October => Month::November, |
| Month::November => Month::December, |
| Month::December => Month::January, |
| } |
| } |
| |
| <span class="doccomment">/// The previous month. |
| /// |
| /// `m`: | `January` | `February` | `...` | `December` |
| /// ----------- | --------- | ---------- | --- | --------- |
| /// `m.pred()`: | `December` | `January` | `...` | `November` |
| </span><span class="attribute">#[inline] |
| #[must_use] |
| </span><span class="kw">pub const fn </span>pred(<span class="kw-2">&</span><span class="self">self</span>) -> Month { |
| <span class="kw">match </span><span class="kw-2">*</span><span class="self">self </span>{ |
| Month::January => Month::December, |
| Month::February => Month::January, |
| Month::March => Month::February, |
| Month::April => Month::March, |
| Month::May => Month::April, |
| Month::June => Month::May, |
| Month::July => Month::June, |
| Month::August => Month::July, |
| Month::September => Month::August, |
| Month::October => Month::September, |
| Month::November => Month::October, |
| Month::December => Month::November, |
| } |
| } |
| |
| <span class="doccomment">/// Returns a month-of-year number starting from January = 1. |
| /// |
| /// `m`: | `January` | `February` | `...` | `December` |
| /// -------------------------| --------- | ---------- | --- | ----- |
| /// `m.number_from_month()`: | 1 | 2 | `...` | 12 |
| </span><span class="attribute">#[inline] |
| #[must_use] |
| </span><span class="kw">pub const fn </span>number_from_month(<span class="kw-2">&</span><span class="self">self</span>) -> u32 { |
| <span class="kw">match </span><span class="kw-2">*</span><span class="self">self </span>{ |
| Month::January => <span class="number">1</span>, |
| Month::February => <span class="number">2</span>, |
| Month::March => <span class="number">3</span>, |
| Month::April => <span class="number">4</span>, |
| Month::May => <span class="number">5</span>, |
| Month::June => <span class="number">6</span>, |
| Month::July => <span class="number">7</span>, |
| Month::August => <span class="number">8</span>, |
| Month::September => <span class="number">9</span>, |
| Month::October => <span class="number">10</span>, |
| Month::November => <span class="number">11</span>, |
| Month::December => <span class="number">12</span>, |
| } |
| } |
| |
| <span class="doccomment">/// Get the name of the month |
| /// |
| /// ``` |
| /// use chrono::Month; |
| /// |
| /// assert_eq!(Month::January.name(), "January") |
| /// ``` |
| </span><span class="attribute">#[must_use] |
| </span><span class="kw">pub const fn </span>name(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span><span class="lifetime">'static </span>str { |
| <span class="kw">match </span><span class="kw-2">*</span><span class="self">self </span>{ |
| Month::January => <span class="string">"January"</span>, |
| Month::February => <span class="string">"February"</span>, |
| Month::March => <span class="string">"March"</span>, |
| Month::April => <span class="string">"April"</span>, |
| Month::May => <span class="string">"May"</span>, |
| Month::June => <span class="string">"June"</span>, |
| Month::July => <span class="string">"July"</span>, |
| Month::August => <span class="string">"August"</span>, |
| Month::September => <span class="string">"September"</span>, |
| Month::October => <span class="string">"October"</span>, |
| Month::November => <span class="string">"November"</span>, |
| Month::December => <span class="string">"December"</span>, |
| } |
| } |
| } |
| |
| <span class="kw">impl </span>TryFrom<u8> <span class="kw">for </span>Month { |
| <span class="kw">type </span>Error = OutOfRange; |
| |
| <span class="kw">fn </span>try_from(value: u8) -> <span class="prelude-ty">Result</span><<span class="self">Self</span>, <span class="self">Self</span>::Error> { |
| <span class="kw">match </span>value { |
| <span class="number">1 </span>=> <span class="prelude-val">Ok</span>(Month::January), |
| <span class="number">2 </span>=> <span class="prelude-val">Ok</span>(Month::February), |
| <span class="number">3 </span>=> <span class="prelude-val">Ok</span>(Month::March), |
| <span class="number">4 </span>=> <span class="prelude-val">Ok</span>(Month::April), |
| <span class="number">5 </span>=> <span class="prelude-val">Ok</span>(Month::May), |
| <span class="number">6 </span>=> <span class="prelude-val">Ok</span>(Month::June), |
| <span class="number">7 </span>=> <span class="prelude-val">Ok</span>(Month::July), |
| <span class="number">8 </span>=> <span class="prelude-val">Ok</span>(Month::August), |
| <span class="number">9 </span>=> <span class="prelude-val">Ok</span>(Month::September), |
| <span class="number">10 </span>=> <span class="prelude-val">Ok</span>(Month::October), |
| <span class="number">11 </span>=> <span class="prelude-val">Ok</span>(Month::November), |
| <span class="number">12 </span>=> <span class="prelude-val">Ok</span>(Month::December), |
| <span class="kw">_ </span>=> <span class="prelude-val">Err</span>(OutOfRange::new()), |
| } |
| } |
| } |
| |
| <span class="kw">impl </span>num_traits::FromPrimitive <span class="kw">for </span>Month { |
| <span class="doccomment">/// Returns an `Option<Month>` from a i64, assuming a 1-index, January = 1. |
| /// |
| /// `Month::from_i64(n: i64)`: | `1` | `2` | ... | `12` |
| /// ---------------------------| -------------------- | --------------------- | ... | ----- |
| /// ``: | Some(Month::January) | Some(Month::February) | ... | Some(Month::December) |
| |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">fn </span>from_u64(n: u64) -> <span class="prelude-ty">Option</span><Month> { |
| <span class="self">Self</span>::from_u32(n <span class="kw">as </span>u32) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>from_i64(n: i64) -> <span class="prelude-ty">Option</span><Month> { |
| <span class="self">Self</span>::from_u32(n <span class="kw">as </span>u32) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>from_u32(n: u32) -> <span class="prelude-ty">Option</span><Month> { |
| <span class="kw">match </span>n { |
| <span class="number">1 </span>=> <span class="prelude-val">Some</span>(Month::January), |
| <span class="number">2 </span>=> <span class="prelude-val">Some</span>(Month::February), |
| <span class="number">3 </span>=> <span class="prelude-val">Some</span>(Month::March), |
| <span class="number">4 </span>=> <span class="prelude-val">Some</span>(Month::April), |
| <span class="number">5 </span>=> <span class="prelude-val">Some</span>(Month::May), |
| <span class="number">6 </span>=> <span class="prelude-val">Some</span>(Month::June), |
| <span class="number">7 </span>=> <span class="prelude-val">Some</span>(Month::July), |
| <span class="number">8 </span>=> <span class="prelude-val">Some</span>(Month::August), |
| <span class="number">9 </span>=> <span class="prelude-val">Some</span>(Month::September), |
| <span class="number">10 </span>=> <span class="prelude-val">Some</span>(Month::October), |
| <span class="number">11 </span>=> <span class="prelude-val">Some</span>(Month::November), |
| <span class="number">12 </span>=> <span class="prelude-val">Some</span>(Month::December), |
| <span class="kw">_ </span>=> <span class="prelude-val">None</span>, |
| } |
| } |
| } |
| |
| <span class="doccomment">/// A duration in calendar months |
| </span><span class="attribute">#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq, PartialOrd)] |
| #[cfg_attr(feature = <span class="string">"arbitrary"</span>, derive(arbitrary::Arbitrary))] |
| </span><span class="kw">pub struct </span>Months(<span class="kw">pub</span>(<span class="kw">crate</span>) u32); |
| |
| <span class="kw">impl </span>Months { |
| <span class="doccomment">/// Construct a new `Months` from a number of months |
| </span><span class="kw">pub const fn </span>new(num: u32) -> <span class="self">Self </span>{ |
| <span class="self">Self</span>(num) |
| } |
| } |
| |
| <span class="doccomment">/// An error resulting from reading `<Month>` value with `FromStr`. |
| </span><span class="attribute">#[derive(Clone, PartialEq, Eq)] |
| </span><span class="kw">pub struct </span>ParseMonthError { |
| <span class="kw">pub</span>(<span class="kw">crate</span>) _dummy: (), |
| } |
| |
| <span class="kw">impl </span>fmt::Debug <span class="kw">for </span>ParseMonthError { |
| <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">"ParseMonthError {{ .. }}"</span>) |
| } |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"serde"</span>)] |
| #[cfg_attr(docsrs, doc(cfg(feature = <span class="string">"serde"</span>)))] |
| </span><span class="kw">mod </span>month_serde { |
| <span class="kw">use </span><span class="kw">super</span>::Month; |
| <span class="kw">use </span>serde::{de, ser}; |
| |
| <span class="kw">use </span>core::fmt; |
| |
| <span class="kw">impl </span>ser::Serialize <span class="kw">for </span>Month { |
| <span class="kw">fn </span>serialize<S>(<span class="kw-2">&</span><span class="self">self</span>, serializer: S) -> <span class="prelude-ty">Result</span><S::Ok, S::Error> |
| <span class="kw">where |
| </span>S: ser::Serializer, |
| { |
| serializer.collect_str(<span class="self">self</span>.name()) |
| } |
| } |
| |
| <span class="kw">struct </span>MonthVisitor; |
| |
| <span class="kw">impl</span><<span class="lifetime">'de</span>> de::Visitor<<span class="lifetime">'de</span>> <span class="kw">for </span>MonthVisitor { |
| <span class="kw">type </span>Value = Month; |
| |
| <span class="kw">fn </span>expecting(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>fmt::Formatter) -> fmt::Result { |
| f.write_str(<span class="string">"Month"</span>) |
| } |
| |
| <span class="kw">fn </span>visit_str<E>(<span class="self">self</span>, value: <span class="kw-2">&</span>str) -> <span class="prelude-ty">Result</span><<span class="self">Self</span>::Value, E> |
| <span class="kw">where |
| </span>E: de::Error, |
| { |
| value.parse().map_err(|<span class="kw">_</span>| E::custom(<span class="string">"short (3-letter) or full month names expected"</span>)) |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'de</span>> de::Deserialize<<span class="lifetime">'de</span>> <span class="kw">for </span>Month { |
| <span class="kw">fn </span>deserialize<D>(deserializer: D) -> <span class="prelude-ty">Result</span><<span class="self">Self</span>, D::Error> |
| <span class="kw">where |
| </span>D: de::Deserializer<<span class="lifetime">'de</span>>, |
| { |
| deserializer.deserialize_str(MonthVisitor) |
| } |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_serde_serialize() { |
| <span class="kw">use </span>serde_json::to_string; |
| <span class="kw">use </span>Month::<span class="kw-2">*</span>; |
| |
| <span class="kw">let </span>cases: Vec<(Month, <span class="kw-2">&</span>str)> = <span class="macro">vec!</span>[ |
| (January, <span class="string">"\"January\""</span>), |
| (February, <span class="string">"\"February\""</span>), |
| (March, <span class="string">"\"March\""</span>), |
| (April, <span class="string">"\"April\""</span>), |
| (May, <span class="string">"\"May\""</span>), |
| (June, <span class="string">"\"June\""</span>), |
| (July, <span class="string">"\"July\""</span>), |
| (August, <span class="string">"\"August\""</span>), |
| (September, <span class="string">"\"September\""</span>), |
| (October, <span class="string">"\"October\""</span>), |
| (November, <span class="string">"\"November\""</span>), |
| (December, <span class="string">"\"December\""</span>), |
| ]; |
| |
| <span class="kw">for </span>(month, expected_str) <span class="kw">in </span>cases { |
| <span class="kw">let </span>string = to_string(<span class="kw-2">&</span>month).unwrap(); |
| <span class="macro">assert_eq!</span>(string, expected_str); |
| } |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_serde_deserialize() { |
| <span class="kw">use </span>serde_json::from_str; |
| <span class="kw">use </span>Month::<span class="kw-2">*</span>; |
| |
| <span class="kw">let </span>cases: Vec<(<span class="kw-2">&</span>str, Month)> = <span class="macro">vec!</span>[ |
| (<span class="string">"\"january\""</span>, January), |
| (<span class="string">"\"jan\""</span>, January), |
| (<span class="string">"\"FeB\""</span>, February), |
| (<span class="string">"\"MAR\""</span>, March), |
| (<span class="string">"\"mar\""</span>, March), |
| (<span class="string">"\"april\""</span>, April), |
| (<span class="string">"\"may\""</span>, May), |
| (<span class="string">"\"june\""</span>, June), |
| (<span class="string">"\"JULY\""</span>, July), |
| (<span class="string">"\"august\""</span>, August), |
| (<span class="string">"\"september\""</span>, September), |
| (<span class="string">"\"October\""</span>, October), |
| (<span class="string">"\"November\""</span>, November), |
| (<span class="string">"\"DECEmbEr\""</span>, December), |
| ]; |
| |
| <span class="kw">for </span>(string, expected_month) <span class="kw">in </span>cases { |
| <span class="kw">let </span>month = from_str::<Month>(string).unwrap(); |
| <span class="macro">assert_eq!</span>(month, expected_month); |
| } |
| |
| <span class="kw">let </span>errors: Vec<<span class="kw-2">&</span>str> = |
| <span class="macro">vec!</span>[<span class="string">"\"not a month\""</span>, <span class="string">"\"ja\""</span>, <span class="string">"\"Dece\""</span>, <span class="string">"Dec"</span>, <span class="string">"\"Augustin\""</span>]; |
| |
| <span class="kw">for </span>string <span class="kw">in </span>errors { |
| from_str::<Month>(string).unwrap_err(); |
| } |
| } |
| } |
| |
| <span class="attribute">#[cfg(test)] |
| </span><span class="kw">mod </span>tests { |
| <span class="kw">use </span><span class="kw">super</span>::Month; |
| <span class="kw">use crate</span>::{Datelike, OutOfRange, TimeZone, Utc}; |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_month_enum_try_from() { |
| <span class="macro">assert_eq!</span>(Month::try_from(<span class="number">1</span>), <span class="prelude-val">Ok</span>(Month::January)); |
| <span class="macro">assert_eq!</span>(Month::try_from(<span class="number">2</span>), <span class="prelude-val">Ok</span>(Month::February)); |
| <span class="macro">assert_eq!</span>(Month::try_from(<span class="number">12</span>), <span class="prelude-val">Ok</span>(Month::December)); |
| <span class="macro">assert_eq!</span>(Month::try_from(<span class="number">13</span>), <span class="prelude-val">Err</span>(OutOfRange::new())); |
| |
| <span class="kw">let </span>date = Utc.with_ymd_and_hms(<span class="number">2019</span>, <span class="number">10</span>, <span class="number">28</span>, <span class="number">9</span>, <span class="number">10</span>, <span class="number">11</span>).unwrap(); |
| <span class="macro">assert_eq!</span>(Month::try_from(date.month() <span class="kw">as </span>u8), <span class="prelude-val">Ok</span>(Month::October)); |
| |
| <span class="kw">let </span>month = Month::January; |
| <span class="kw">let </span>dt = Utc.with_ymd_and_hms(<span class="number">2019</span>, month.number_from_month(), <span class="number">28</span>, <span class="number">9</span>, <span class="number">10</span>, <span class="number">11</span>).unwrap(); |
| <span class="macro">assert_eq!</span>((dt.year(), dt.month(), dt.day()), (<span class="number">2019</span>, <span class="number">1</span>, <span class="number">28</span>)); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_month_enum_primitive_parse() { |
| <span class="kw">use </span>num_traits::FromPrimitive; |
| |
| <span class="kw">let </span>jan_opt = Month::from_u32(<span class="number">1</span>); |
| <span class="kw">let </span>feb_opt = Month::from_u64(<span class="number">2</span>); |
| <span class="kw">let </span>dec_opt = Month::from_i64(<span class="number">12</span>); |
| <span class="kw">let </span>no_month = Month::from_u32(<span class="number">13</span>); |
| <span class="macro">assert_eq!</span>(jan_opt, <span class="prelude-val">Some</span>(Month::January)); |
| <span class="macro">assert_eq!</span>(feb_opt, <span class="prelude-val">Some</span>(Month::February)); |
| <span class="macro">assert_eq!</span>(dec_opt, <span class="prelude-val">Some</span>(Month::December)); |
| <span class="macro">assert_eq!</span>(no_month, <span class="prelude-val">None</span>); |
| |
| <span class="kw">let </span>date = Utc.with_ymd_and_hms(<span class="number">2019</span>, <span class="number">10</span>, <span class="number">28</span>, <span class="number">9</span>, <span class="number">10</span>, <span class="number">11</span>).unwrap(); |
| <span class="macro">assert_eq!</span>(Month::from_u32(date.month()), <span class="prelude-val">Some</span>(Month::October)); |
| |
| <span class="kw">let </span>month = Month::January; |
| <span class="kw">let </span>dt = Utc.with_ymd_and_hms(<span class="number">2019</span>, month.number_from_month(), <span class="number">28</span>, <span class="number">9</span>, <span class="number">10</span>, <span class="number">11</span>).unwrap(); |
| <span class="macro">assert_eq!</span>((dt.year(), dt.month(), dt.day()), (<span class="number">2019</span>, <span class="number">1</span>, <span class="number">28</span>)); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_month_enum_succ_pred() { |
| <span class="macro">assert_eq!</span>(Month::January.succ(), Month::February); |
| <span class="macro">assert_eq!</span>(Month::December.succ(), Month::January); |
| <span class="macro">assert_eq!</span>(Month::January.pred(), Month::December); |
| <span class="macro">assert_eq!</span>(Month::February.pred(), Month::January); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_month_partial_ord() { |
| <span class="macro">assert!</span>(Month::January <= Month::January); |
| <span class="macro">assert!</span>(Month::January < Month::February); |
| <span class="macro">assert!</span>(Month::January < Month::December); |
| <span class="macro">assert!</span>(Month::July >= Month::May); |
| <span class="macro">assert!</span>(Month::September > Month::March); |
| } |
| } |
| </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> |
