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<!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/weekday.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>weekday.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">&quot;rkyv&quot;</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 day of week.
///
/// The order of the days of week depends on the context.
/// (This is why this type does *not* implement `PartialOrd` or `Ord` traits.)
/// One should prefer `*_from_monday` or `*_from_sunday` methods to get the correct result.
///
/// # Example
/// ```
/// use chrono::Weekday;
///
/// let monday = &quot;Monday&quot;.parse::&lt;Weekday&gt;().unwrap();
/// assert_eq!(monday, Weekday::Mon);
///
/// let sunday = Weekday::try_from(6).unwrap();
/// assert_eq!(sunday, Weekday::Sun);
///
/// assert_eq!(sunday.num_days_from_monday(), 6); // starts counting with Monday = 0
/// assert_eq!(sunday.number_from_monday(), 7); // starts counting with Monday = 1
/// assert_eq!(sunday.num_days_from_sunday(), 0); // starts counting with Sunday = 0
/// assert_eq!(sunday.number_from_sunday(), 1); // starts counting with Sunday = 1
///
/// assert_eq!(sunday.succ(), monday);
/// assert_eq!(sunday.pred(), Weekday::Sat);
/// ```
</span><span class="attribute">#[derive(PartialEq, Eq, Copy, Clone, Debug, Hash)]
#[cfg_attr(feature = <span class="string">&quot;rustc-serialize&quot;</span>, derive(RustcEncodable, RustcDecodable))]
#[cfg_attr(feature = <span class="string">&quot;rkyv&quot;</span>, derive(Archive, Deserialize, Serialize))]
#[cfg_attr(feature = <span class="string">&quot;arbitrary&quot;</span>, derive(arbitrary::Arbitrary))]
</span><span class="kw">pub enum </span>Weekday {
<span class="doccomment">/// Monday.
</span>Mon = <span class="number">0</span>,
<span class="doccomment">/// Tuesday.
</span>Tue = <span class="number">1</span>,
<span class="doccomment">/// Wednesday.
</span>Wed = <span class="number">2</span>,
<span class="doccomment">/// Thursday.
</span>Thu = <span class="number">3</span>,
<span class="doccomment">/// Friday.
</span>Fri = <span class="number">4</span>,
<span class="doccomment">/// Saturday.
</span>Sat = <span class="number">5</span>,
<span class="doccomment">/// Sunday.
</span>Sun = <span class="number">6</span>,
}
<span class="kw">impl </span>Weekday {
<span class="doccomment">/// The next day in the week.
///
/// `w`: | `Mon` | `Tue` | `Wed` | `Thu` | `Fri` | `Sat` | `Sun`
/// ----------- | ----- | ----- | ----- | ----- | ----- | ----- | -----
/// `w.succ()`: | `Tue` | `Wed` | `Thu` | `Fri` | `Sat` | `Sun` | `Mon`
</span><span class="attribute">#[inline]
#[must_use]
</span><span class="kw">pub const fn </span>succ(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; Weekday {
<span class="kw">match </span><span class="kw-2">*</span><span class="self">self </span>{
Weekday::Mon =&gt; Weekday::Tue,
Weekday::Tue =&gt; Weekday::Wed,
Weekday::Wed =&gt; Weekday::Thu,
Weekday::Thu =&gt; Weekday::Fri,
Weekday::Fri =&gt; Weekday::Sat,
Weekday::Sat =&gt; Weekday::Sun,
Weekday::Sun =&gt; Weekday::Mon,
}
}
<span class="doccomment">/// The previous day in the week.
///
/// `w`: | `Mon` | `Tue` | `Wed` | `Thu` | `Fri` | `Sat` | `Sun`
/// ----------- | ----- | ----- | ----- | ----- | ----- | ----- | -----
/// `w.pred()`: | `Sun` | `Mon` | `Tue` | `Wed` | `Thu` | `Fri` | `Sat`
</span><span class="attribute">#[inline]
#[must_use]
</span><span class="kw">pub const fn </span>pred(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; Weekday {
<span class="kw">match </span><span class="kw-2">*</span><span class="self">self </span>{
Weekday::Mon =&gt; Weekday::Sun,
Weekday::Tue =&gt; Weekday::Mon,
Weekday::Wed =&gt; Weekday::Tue,
Weekday::Thu =&gt; Weekday::Wed,
Weekday::Fri =&gt; Weekday::Thu,
Weekday::Sat =&gt; Weekday::Fri,
Weekday::Sun =&gt; Weekday::Sat,
}
}
<span class="doccomment">/// Returns a day-of-week number starting from Monday = 1. (ISO 8601 weekday number)
///
/// `w`: | `Mon` | `Tue` | `Wed` | `Thu` | `Fri` | `Sat` | `Sun`
/// ------------------------- | ----- | ----- | ----- | ----- | ----- | ----- | -----
/// `w.number_from_monday()`: | 1 | 2 | 3 | 4 | 5 | 6 | 7
</span><span class="attribute">#[inline]
</span><span class="kw">pub const fn </span>number_from_monday(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; u32 {
<span class="self">self</span>.num_days_from(Weekday::Mon) + <span class="number">1
</span>}
<span class="doccomment">/// Returns a day-of-week number starting from Sunday = 1.
///
/// `w`: | `Mon` | `Tue` | `Wed` | `Thu` | `Fri` | `Sat` | `Sun`
/// ------------------------- | ----- | ----- | ----- | ----- | ----- | ----- | -----
/// `w.number_from_sunday()`: | 2 | 3 | 4 | 5 | 6 | 7 | 1
</span><span class="attribute">#[inline]
</span><span class="kw">pub const fn </span>number_from_sunday(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; u32 {
<span class="self">self</span>.num_days_from(Weekday::Sun) + <span class="number">1
</span>}
<span class="doccomment">/// Returns a day-of-week number starting from Monday = 0.
///
/// `w`: | `Mon` | `Tue` | `Wed` | `Thu` | `Fri` | `Sat` | `Sun`
/// --------------------------- | ----- | ----- | ----- | ----- | ----- | ----- | -----
/// `w.num_days_from_monday()`: | 0 | 1 | 2 | 3 | 4 | 5 | 6
</span><span class="attribute">#[inline]
</span><span class="kw">pub const fn </span>num_days_from_monday(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; u32 {
<span class="self">self</span>.num_days_from(Weekday::Mon)
}
<span class="doccomment">/// Returns a day-of-week number starting from Sunday = 0.
///
/// `w`: | `Mon` | `Tue` | `Wed` | `Thu` | `Fri` | `Sat` | `Sun`
/// --------------------------- | ----- | ----- | ----- | ----- | ----- | ----- | -----
/// `w.num_days_from_sunday()`: | 1 | 2 | 3 | 4 | 5 | 6 | 0
</span><span class="attribute">#[inline]
</span><span class="kw">pub const fn </span>num_days_from_sunday(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; u32 {
<span class="self">self</span>.num_days_from(Weekday::Sun)
}
<span class="doccomment">/// Returns a day-of-week number starting from the parameter `day` (D) = 0.
///
/// `w`: | `D` | `D+1` | `D+2` | `D+3` | `D+4` | `D+5` | `D+6`
/// --------------------------- | ----- | ----- | ----- | ----- | ----- | ----- | -----
/// `w.num_days_from(wd)`: | 0 | 1 | 2 | 3 | 4 | 5 | 6
</span><span class="attribute">#[inline]
</span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">const fn </span>num_days_from(<span class="kw-2">&amp;</span><span class="self">self</span>, day: Weekday) -&gt; u32 {
(<span class="kw-2">*</span><span class="self">self </span><span class="kw">as </span>u32 + <span class="number">7 </span>- day <span class="kw">as </span>u32) % <span class="number">7
</span>}
}
<span class="kw">impl </span>fmt::Display <span class="kw">for </span>Weekday {
<span class="kw">fn </span>fmt(<span class="kw-2">&amp;</span><span class="self">self</span>, f: <span class="kw-2">&amp;mut </span>fmt::Formatter) -&gt; fmt::Result {
f.write_str(<span class="kw">match </span><span class="kw-2">*</span><span class="self">self </span>{
Weekday::Mon =&gt; <span class="string">&quot;Mon&quot;</span>,
Weekday::Tue =&gt; <span class="string">&quot;Tue&quot;</span>,
Weekday::Wed =&gt; <span class="string">&quot;Wed&quot;</span>,
Weekday::Thu =&gt; <span class="string">&quot;Thu&quot;</span>,
Weekday::Fri =&gt; <span class="string">&quot;Fri&quot;</span>,
Weekday::Sat =&gt; <span class="string">&quot;Sat&quot;</span>,
Weekday::Sun =&gt; <span class="string">&quot;Sun&quot;</span>,
})
}
}
<span class="doccomment">/// Any weekday can be represented as an integer from 0 to 6, which equals to
/// [`Weekday::num_days_from_monday`](#method.num_days_from_monday) in this implementation.
/// Do not heavily depend on this though; use explicit methods whenever possible.
</span><span class="kw">impl </span>TryFrom&lt;u8&gt; <span class="kw">for </span>Weekday {
<span class="kw">type </span>Error = OutOfRange;
<span class="kw">fn </span>try_from(value: u8) -&gt; <span class="prelude-ty">Result</span>&lt;<span class="self">Self</span>, <span class="self">Self</span>::Error&gt; {
<span class="kw">match </span>value {
<span class="number">0 </span>=&gt; <span class="prelude-val">Ok</span>(Weekday::Mon),
<span class="number">1 </span>=&gt; <span class="prelude-val">Ok</span>(Weekday::Tue),
<span class="number">2 </span>=&gt; <span class="prelude-val">Ok</span>(Weekday::Wed),
<span class="number">3 </span>=&gt; <span class="prelude-val">Ok</span>(Weekday::Thu),
<span class="number">4 </span>=&gt; <span class="prelude-val">Ok</span>(Weekday::Fri),
<span class="number">5 </span>=&gt; <span class="prelude-val">Ok</span>(Weekday::Sat),
<span class="number">6 </span>=&gt; <span class="prelude-val">Ok</span>(Weekday::Sun),
<span class="kw">_ </span>=&gt; <span class="prelude-val">Err</span>(OutOfRange::new()),
}
}
}
<span class="doccomment">/// Any weekday can be represented as an integer from 0 to 6, which equals to
/// [`Weekday::num_days_from_monday`](#method.num_days_from_monday) in this implementation.
/// Do not heavily depend on this though; use explicit methods whenever possible.
</span><span class="kw">impl </span>num_traits::FromPrimitive <span class="kw">for </span>Weekday {
<span class="attribute">#[inline]
</span><span class="kw">fn </span>from_i64(n: i64) -&gt; <span class="prelude-ty">Option</span>&lt;Weekday&gt; {
<span class="kw">match </span>n {
<span class="number">0 </span>=&gt; <span class="prelude-val">Some</span>(Weekday::Mon),
<span class="number">1 </span>=&gt; <span class="prelude-val">Some</span>(Weekday::Tue),
<span class="number">2 </span>=&gt; <span class="prelude-val">Some</span>(Weekday::Wed),
<span class="number">3 </span>=&gt; <span class="prelude-val">Some</span>(Weekday::Thu),
<span class="number">4 </span>=&gt; <span class="prelude-val">Some</span>(Weekday::Fri),
<span class="number">5 </span>=&gt; <span class="prelude-val">Some</span>(Weekday::Sat),
<span class="number">6 </span>=&gt; <span class="prelude-val">Some</span>(Weekday::Sun),
<span class="kw">_ </span>=&gt; <span class="prelude-val">None</span>,
}
}
<span class="attribute">#[inline]
</span><span class="kw">fn </span>from_u64(n: u64) -&gt; <span class="prelude-ty">Option</span>&lt;Weekday&gt; {
<span class="kw">match </span>n {
<span class="number">0 </span>=&gt; <span class="prelude-val">Some</span>(Weekday::Mon),
<span class="number">1 </span>=&gt; <span class="prelude-val">Some</span>(Weekday::Tue),
<span class="number">2 </span>=&gt; <span class="prelude-val">Some</span>(Weekday::Wed),
<span class="number">3 </span>=&gt; <span class="prelude-val">Some</span>(Weekday::Thu),
<span class="number">4 </span>=&gt; <span class="prelude-val">Some</span>(Weekday::Fri),
<span class="number">5 </span>=&gt; <span class="prelude-val">Some</span>(Weekday::Sat),
<span class="number">6 </span>=&gt; <span class="prelude-val">Some</span>(Weekday::Sun),
<span class="kw">_ </span>=&gt; <span class="prelude-val">None</span>,
}
}
}
<span class="doccomment">/// An error resulting from reading `Weekday` value with `FromStr`.
</span><span class="attribute">#[derive(Clone, PartialEq, Eq)]
</span><span class="kw">pub struct </span>ParseWeekdayError {
<span class="kw">pub</span>(<span class="kw">crate</span>) _dummy: (),
}
<span class="attribute">#[cfg(feature = <span class="string">&quot;std&quot;</span>)]
#[cfg_attr(docsrs, doc(cfg(feature = <span class="string">&quot;std&quot;</span>)))]
</span><span class="kw">impl </span>std::error::Error <span class="kw">for </span>ParseWeekdayError {}
<span class="kw">impl </span>fmt::Display <span class="kw">for </span>ParseWeekdayError {
<span class="kw">fn </span>fmt(<span class="kw-2">&amp;</span><span class="self">self</span>, f: <span class="kw-2">&amp;mut </span>fmt::Formatter) -&gt; fmt::Result {
f.write_fmt(<span class="macro">format_args!</span>(<span class="string">&quot;{:?}&quot;</span>, <span class="self">self</span>))
}
}
<span class="kw">impl </span>fmt::Debug <span class="kw">for </span>ParseWeekdayError {
<span class="kw">fn </span>fmt(<span class="kw-2">&amp;</span><span class="self">self</span>, f: <span class="kw-2">&amp;mut </span>fmt::Formatter) -&gt; fmt::Result {
<span class="macro">write!</span>(f, <span class="string">&quot;ParseWeekdayError {{ .. }}&quot;</span>)
}
}
<span class="attribute">#[cfg(test)]
</span><span class="kw">mod </span>tests {
<span class="kw">use </span><span class="kw">super</span>::Weekday;
<span class="attribute">#[test]
</span><span class="kw">fn </span>test_num_days_from() {
<span class="kw">for </span>i <span class="kw">in </span><span class="number">0</span>..<span class="number">7 </span>{
<span class="kw">let </span>base_day = Weekday::try_from(i).unwrap();
<span class="macro">assert_eq!</span>(base_day.num_days_from_monday(), base_day.num_days_from(Weekday::Mon));
<span class="macro">assert_eq!</span>(base_day.num_days_from_sunday(), base_day.num_days_from(Weekday::Sun));
<span class="macro">assert_eq!</span>(base_day.num_days_from(base_day), <span class="number">0</span>);
<span class="macro">assert_eq!</span>(base_day.num_days_from(base_day.pred()), <span class="number">1</span>);
<span class="macro">assert_eq!</span>(base_day.num_days_from(base_day.pred().pred()), <span class="number">2</span>);
<span class="macro">assert_eq!</span>(base_day.num_days_from(base_day.pred().pred().pred()), <span class="number">3</span>);
<span class="macro">assert_eq!</span>(base_day.num_days_from(base_day.pred().pred().pred().pred()), <span class="number">4</span>);
<span class="macro">assert_eq!</span>(base_day.num_days_from(base_day.pred().pred().pred().pred().pred()), <span class="number">5</span>);
<span class="macro">assert_eq!</span>(
base_day.num_days_from(base_day.pred().pred().pred().pred().pred().pred()),
<span class="number">6
</span>);
<span class="macro">assert_eq!</span>(base_day.num_days_from(base_day.succ()), <span class="number">6</span>);
<span class="macro">assert_eq!</span>(base_day.num_days_from(base_day.succ().succ()), <span class="number">5</span>);
<span class="macro">assert_eq!</span>(base_day.num_days_from(base_day.succ().succ().succ()), <span class="number">4</span>);
<span class="macro">assert_eq!</span>(base_day.num_days_from(base_day.succ().succ().succ().succ()), <span class="number">3</span>);
<span class="macro">assert_eq!</span>(base_day.num_days_from(base_day.succ().succ().succ().succ().succ()), <span class="number">2</span>);
<span class="macro">assert_eq!</span>(
base_day.num_days_from(base_day.succ().succ().succ().succ().succ().succ()),
<span class="number">1
</span>);
}
}
}
<span class="comment">// the actual `FromStr` implementation is in the `format` module to leverage the existing code
</span><span class="attribute">#[cfg(feature = <span class="string">&quot;serde&quot;</span>)]
#[cfg_attr(docsrs, doc(cfg(feature = <span class="string">&quot;serde&quot;</span>)))]
</span><span class="kw">mod </span>weekday_serde {
<span class="kw">use </span><span class="kw">super</span>::Weekday;
<span class="kw">use </span>core::fmt;
<span class="kw">use </span>serde::{de, ser};
<span class="kw">impl </span>ser::Serialize <span class="kw">for </span>Weekday {
<span class="kw">fn </span>serialize&lt;S&gt;(<span class="kw-2">&amp;</span><span class="self">self</span>, serializer: S) -&gt; <span class="prelude-ty">Result</span>&lt;S::Ok, S::Error&gt;
<span class="kw">where
</span>S: ser::Serializer,
{
serializer.collect_str(<span class="kw-2">&amp;</span><span class="self">self</span>)
}
}
<span class="kw">struct </span>WeekdayVisitor;
<span class="kw">impl</span>&lt;<span class="lifetime">&#39;de</span>&gt; de::Visitor&lt;<span class="lifetime">&#39;de</span>&gt; <span class="kw">for </span>WeekdayVisitor {
<span class="kw">type </span>Value = Weekday;
<span class="kw">fn </span>expecting(<span class="kw-2">&amp;</span><span class="self">self</span>, f: <span class="kw-2">&amp;mut </span>fmt::Formatter) -&gt; fmt::Result {
f.write_str(<span class="string">&quot;Weekday&quot;</span>)
}
<span class="kw">fn </span>visit_str&lt;E&gt;(<span class="self">self</span>, value: <span class="kw-2">&amp;</span>str) -&gt; <span class="prelude-ty">Result</span>&lt;<span class="self">Self</span>::Value, E&gt;
<span class="kw">where
</span>E: de::Error,
{
value.parse().map_err(|<span class="kw">_</span>| E::custom(<span class="string">&quot;short or long weekday names expected&quot;</span>))
}
}
<span class="kw">impl</span>&lt;<span class="lifetime">&#39;de</span>&gt; de::Deserialize&lt;<span class="lifetime">&#39;de</span>&gt; <span class="kw">for </span>Weekday {
<span class="kw">fn </span>deserialize&lt;D&gt;(deserializer: D) -&gt; <span class="prelude-ty">Result</span>&lt;<span class="self">Self</span>, D::Error&gt;
<span class="kw">where
</span>D: de::Deserializer&lt;<span class="lifetime">&#39;de</span>&gt;,
{
deserializer.deserialize_str(WeekdayVisitor)
}
}
<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>Weekday::<span class="kw-2">*</span>;
<span class="kw">let </span>cases: Vec&lt;(Weekday, <span class="kw-2">&amp;</span>str)&gt; = <span class="macro">vec!</span>[
(Mon, <span class="string">&quot;\&quot;Mon\&quot;&quot;</span>),
(Tue, <span class="string">&quot;\&quot;Tue\&quot;&quot;</span>),
(Wed, <span class="string">&quot;\&quot;Wed\&quot;&quot;</span>),
(Thu, <span class="string">&quot;\&quot;Thu\&quot;&quot;</span>),
(Fri, <span class="string">&quot;\&quot;Fri\&quot;&quot;</span>),
(Sat, <span class="string">&quot;\&quot;Sat\&quot;&quot;</span>),
(Sun, <span class="string">&quot;\&quot;Sun\&quot;&quot;</span>),
];
<span class="kw">for </span>(weekday, expected_str) <span class="kw">in </span>cases {
<span class="kw">let </span>string = to_string(<span class="kw-2">&amp;</span>weekday).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>Weekday::<span class="kw-2">*</span>;
<span class="kw">let </span>cases: Vec&lt;(<span class="kw-2">&amp;</span>str, Weekday)&gt; = <span class="macro">vec!</span>[
(<span class="string">&quot;\&quot;mon\&quot;&quot;</span>, Mon),
(<span class="string">&quot;\&quot;MONDAY\&quot;&quot;</span>, Mon),
(<span class="string">&quot;\&quot;MonDay\&quot;&quot;</span>, Mon),
(<span class="string">&quot;\&quot;mOn\&quot;&quot;</span>, Mon),
(<span class="string">&quot;\&quot;tue\&quot;&quot;</span>, Tue),
(<span class="string">&quot;\&quot;tuesday\&quot;&quot;</span>, Tue),
(<span class="string">&quot;\&quot;wed\&quot;&quot;</span>, Wed),
(<span class="string">&quot;\&quot;wednesday\&quot;&quot;</span>, Wed),
(<span class="string">&quot;\&quot;thu\&quot;&quot;</span>, Thu),
(<span class="string">&quot;\&quot;thursday\&quot;&quot;</span>, Thu),
(<span class="string">&quot;\&quot;fri\&quot;&quot;</span>, Fri),
(<span class="string">&quot;\&quot;friday\&quot;&quot;</span>, Fri),
(<span class="string">&quot;\&quot;sat\&quot;&quot;</span>, Sat),
(<span class="string">&quot;\&quot;saturday\&quot;&quot;</span>, Sat),
(<span class="string">&quot;\&quot;sun\&quot;&quot;</span>, Sun),
(<span class="string">&quot;\&quot;sunday\&quot;&quot;</span>, Sun),
];
<span class="kw">for </span>(str, expected_weekday) <span class="kw">in </span>cases {
<span class="kw">let </span>weekday = from_str::&lt;Weekday&gt;(str).unwrap();
<span class="macro">assert_eq!</span>(weekday, expected_weekday);
}
<span class="kw">let </span>errors: Vec&lt;<span class="kw-2">&amp;</span>str&gt; =
<span class="macro">vec!</span>[<span class="string">&quot;\&quot;not a weekday\&quot;&quot;</span>, <span class="string">&quot;\&quot;monDAYs\&quot;&quot;</span>, <span class="string">&quot;\&quot;mond\&quot;&quot;</span>, <span class="string">&quot;mon&quot;</span>, <span class="string">&quot;\&quot;thur\&quot;&quot;</span>, <span class="string">&quot;\&quot;thurs\&quot;&quot;</span>];
<span class="kw">for </span>str <span class="kw">in </span>errors {
from_str::&lt;Weekday&gt;(str).unwrap_err();
}
}
}
</code></pre></div>
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