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| </pre><pre class="rust"><code><span class="doccomment">//! The `Month` enum and its associated `impl`s. |
| |
| </span><span class="kw">use </span>core::fmt; |
| <span class="kw">use </span>core::num::NonZeroU8; |
| <span class="kw">use </span>core::str::FromStr; |
| |
| <span class="kw">use </span><span class="self">self</span>::Month::<span class="kw-2">*</span>; |
| <span class="kw">use </span><span class="kw">crate</span>::error; |
| |
| <span class="doccomment">/// Months of the year. |
| </span><span class="attribute">#[allow(clippy::missing_docs_in_private_items)] </span><span class="comment">// variants |
| </span><span class="attribute">#[repr(u8)] |
| #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)] |
| </span><span class="kw">pub enum </span>Month { |
| January = <span class="number">1</span>, |
| February = <span class="number">2</span>, |
| March = <span class="number">3</span>, |
| April = <span class="number">4</span>, |
| May = <span class="number">5</span>, |
| June = <span class="number">6</span>, |
| July = <span class="number">7</span>, |
| August = <span class="number">8</span>, |
| September = <span class="number">9</span>, |
| October = <span class="number">10</span>, |
| November = <span class="number">11</span>, |
| December = <span class="number">12</span>, |
| } |
| |
| <span class="kw">impl </span>Month { |
| <span class="doccomment">/// Create a `Month` from its numerical value. |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">const fn </span>from_number(n: NonZeroU8) -> <span class="prelude-ty">Result</span><<span class="self">Self</span>, error::ComponentRange> { |
| <span class="kw">match </span>n.get() { |
| <span class="number">1 </span>=> <span class="prelude-val">Ok</span>(January), |
| <span class="number">2 </span>=> <span class="prelude-val">Ok</span>(February), |
| <span class="number">3 </span>=> <span class="prelude-val">Ok</span>(March), |
| <span class="number">4 </span>=> <span class="prelude-val">Ok</span>(April), |
| <span class="number">5 </span>=> <span class="prelude-val">Ok</span>(May), |
| <span class="number">6 </span>=> <span class="prelude-val">Ok</span>(June), |
| <span class="number">7 </span>=> <span class="prelude-val">Ok</span>(July), |
| <span class="number">8 </span>=> <span class="prelude-val">Ok</span>(August), |
| <span class="number">9 </span>=> <span class="prelude-val">Ok</span>(September), |
| <span class="number">10 </span>=> <span class="prelude-val">Ok</span>(October), |
| <span class="number">11 </span>=> <span class="prelude-val">Ok</span>(November), |
| <span class="number">12 </span>=> <span class="prelude-val">Ok</span>(December), |
| n => <span class="prelude-val">Err</span>(error::ComponentRange { |
| name: <span class="string">"month"</span>, |
| minimum: <span class="number">1</span>, |
| maximum: <span class="number">12</span>, |
| value: n <span class="kw">as _</span>, |
| conditional_range: <span class="bool-val">false</span>, |
| }), |
| } |
| } |
| |
| <span class="doccomment">/// Get the previous month. |
| /// |
| /// ```rust |
| /// # use time::Month; |
| /// assert_eq!(Month::January.previous(), Month::December); |
| /// ``` |
| </span><span class="kw">pub const fn </span>previous(<span class="self">self</span>) -> <span class="self">Self </span>{ |
| <span class="kw">match </span><span class="self">self </span>{ |
| January => December, |
| February => January, |
| March => February, |
| April => March, |
| May => April, |
| June => May, |
| July => June, |
| August => July, |
| September => August, |
| October => September, |
| November => October, |
| December => November, |
| } |
| } |
| |
| <span class="doccomment">/// Get the next month. |
| /// |
| /// ```rust |
| /// # use time::Month; |
| /// assert_eq!(Month::January.next(), Month::February); |
| /// ``` |
| </span><span class="kw">pub const fn </span>next(<span class="self">self</span>) -> <span class="self">Self </span>{ |
| <span class="kw">match </span><span class="self">self </span>{ |
| January => February, |
| February => March, |
| March => April, |
| April => May, |
| May => June, |
| June => July, |
| July => August, |
| August => September, |
| September => October, |
| October => November, |
| November => December, |
| December => January, |
| } |
| } |
| } |
| |
| <span class="kw">impl </span>fmt::Display <span class="kw">for </span>Month { |
| <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<<span class="lifetime">'_</span>>) -> fmt::Result { |
| f.write_str(<span class="kw">match </span><span class="self">self </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">impl </span>FromStr <span class="kw">for </span>Month { |
| <span class="kw">type </span><span class="prelude-val">Err </span>= error::InvalidVariant; |
| |
| <span class="kw">fn </span>from_str(s: <span class="kw-2">&</span>str) -> <span class="prelude-ty">Result</span><<span class="self">Self</span>, <span class="self">Self</span>::Err> { |
| <span class="kw">match </span>s { |
| <span class="string">"January" </span>=> <span class="prelude-val">Ok</span>(January), |
| <span class="string">"February" </span>=> <span class="prelude-val">Ok</span>(February), |
| <span class="string">"March" </span>=> <span class="prelude-val">Ok</span>(March), |
| <span class="string">"April" </span>=> <span class="prelude-val">Ok</span>(April), |
| <span class="string">"May" </span>=> <span class="prelude-val">Ok</span>(May), |
| <span class="string">"June" </span>=> <span class="prelude-val">Ok</span>(June), |
| <span class="string">"July" </span>=> <span class="prelude-val">Ok</span>(July), |
| <span class="string">"August" </span>=> <span class="prelude-val">Ok</span>(August), |
| <span class="string">"September" </span>=> <span class="prelude-val">Ok</span>(September), |
| <span class="string">"October" </span>=> <span class="prelude-val">Ok</span>(October), |
| <span class="string">"November" </span>=> <span class="prelude-val">Ok</span>(November), |
| <span class="string">"December" </span>=> <span class="prelude-val">Ok</span>(December), |
| <span class="kw">_ </span>=> <span class="prelude-val">Err</span>(error::InvalidVariant), |
| } |
| } |
| } |
| |
| <span class="kw">impl </span>From<Month> <span class="kw">for </span>u8 { |
| <span class="kw">fn </span>from(month: Month) -> <span class="self">Self </span>{ |
| month <span class="kw">as _ |
| </span>} |
| } |
| |
| <span class="kw">impl </span>TryFrom<u8> <span class="kw">for </span>Month { |
| <span class="kw">type </span>Error = error::ComponentRange; |
| |
| <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>NonZeroU8::new(value) { |
| <span class="prelude-val">Some</span>(value) => <span class="self">Self</span>::from_number(value), |
| <span class="prelude-val">None </span>=> <span class="prelude-val">Err</span>(error::ComponentRange { |
| name: <span class="string">"month"</span>, |
| minimum: <span class="number">1</span>, |
| maximum: <span class="number">12</span>, |
| value: <span class="number">0</span>, |
| conditional_range: <span class="bool-val">false</span>, |
| }), |
| } |
| } |
| } |
| </code></pre></div> |
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