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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/format/parsed.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>parsed.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">//! A collection of parsed date and time items.
 //! They can be constructed incrementally while being checked for consistency.

 </span><span class="kw">use super</span>::{ParseResult, IMPOSSIBLE, NOT_ENOUGH, OUT_OF_RANGE};
 <span class="kw">use </span><span class="kw">crate</span>::naive::{NaiveDate, NaiveDateTime, NaiveTime};
 <span class="kw">use </span><span class="kw">crate</span>::offset::{FixedOffset, LocalResult, Offset, TimeZone};
 <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 </span><span class="kw">crate</span>::Weekday;
 <span class="kw">use crate</span>::{Datelike, Timelike};

 <span class="doccomment">/// Parsed parts of date and time. There are two classes of methods:
 ///
 /// - `set_*` methods try to set given field(s) while checking for the consistency.
 ///   It may or may not check for the range constraint immediately (for efficiency reasons).
 ///
 /// - `to_*` methods try to make a concrete date and time value out of set fields.
 ///   It fully checks any remaining out-of-range conditions and inconsistent/impossible fields.
 </span><span class="attribute">#[allow(clippy::manual_non_exhaustive)]
 #[derive(Clone, PartialEq, Eq, Debug, Default, Hash)]
 </span><span class="kw">pub struct </span>Parsed {
     <span class="doccomment">/// Year.
     ///
     /// This can be negative unlike [`year_div_100`](#structfield.year_div_100)
     /// and [`year_mod_100`](#structfield.year_mod_100) fields.
     </span><span class="kw">pub </span>year: <span class="prelude-ty">Option</span>&lt;i32&gt;,

     <span class="doccomment">/// Year divided by 100. Implies that the year is &gt;= 1 BCE when set.
     ///
     /// Due to the common usage, if this field is missing but
     /// [`year_mod_100`](#structfield.year_mod_100) is present,
     /// it is inferred to 19 when `year_mod_100 &gt;= 70` and 20 otherwise.
     </span><span class="kw">pub </span>year_div_100: <span class="prelude-ty">Option</span>&lt;i32&gt;,

     <span class="doccomment">/// Year modulo 100. Implies that the year is &gt;= 1 BCE when set.
     </span><span class="kw">pub </span>year_mod_100: <span class="prelude-ty">Option</span>&lt;i32&gt;,

     <span class="doccomment">/// Year in the [ISO week date](../naive/struct.NaiveDate.html#week-date).
     ///
     /// This can be negative unlike [`isoyear_div_100`](#structfield.isoyear_div_100) and
     /// [`isoyear_mod_100`](#structfield.isoyear_mod_100) fields.
     </span><span class="kw">pub </span>isoyear: <span class="prelude-ty">Option</span>&lt;i32&gt;,

     <span class="doccomment">/// Year in the [ISO week date](../naive/struct.NaiveDate.html#week-date), divided by 100.
     /// Implies that the year is &gt;= 1 BCE when set.
     ///
     /// Due to the common usage, if this field is missing but
     /// [`isoyear_mod_100`](#structfield.isoyear_mod_100) is present,
     /// it is inferred to 19 when `isoyear_mod_100 &gt;= 70` and 20 otherwise.
     </span><span class="kw">pub </span>isoyear_div_100: <span class="prelude-ty">Option</span>&lt;i32&gt;,

     <span class="doccomment">/// Year in the [ISO week date](../naive/struct.NaiveDate.html#week-date), modulo 100.
     /// Implies that the year is &gt;= 1 BCE when set.
     </span><span class="kw">pub </span>isoyear_mod_100: <span class="prelude-ty">Option</span>&lt;i32&gt;,

     <span class="doccomment">/// Month (1--12).
     </span><span class="kw">pub </span>month: <span class="prelude-ty">Option</span>&lt;u32&gt;,

     <span class="doccomment">/// Week number, where the week 1 starts at the first Sunday of January
     /// (0--53, 1--53 or 1--52 depending on the year).
     </span><span class="kw">pub </span>week_from_sun: <span class="prelude-ty">Option</span>&lt;u32&gt;,

     <span class="doccomment">/// Week number, where the week 1 starts at the first Monday of January
     /// (0--53, 1--53 or 1--52 depending on the year).
     </span><span class="kw">pub </span>week_from_mon: <span class="prelude-ty">Option</span>&lt;u32&gt;,

     <span class="doccomment">/// [ISO week number](../naive/struct.NaiveDate.html#week-date)
     /// (1--52 or 1--53 depending on the year).
     </span><span class="kw">pub </span>isoweek: <span class="prelude-ty">Option</span>&lt;u32&gt;,

     <span class="doccomment">/// Day of the week.
     </span><span class="kw">pub </span>weekday: <span class="prelude-ty">Option</span>&lt;Weekday&gt;,

     <span class="doccomment">/// Day of the year (1--365 or 1--366 depending on the year).
     </span><span class="kw">pub </span>ordinal: <span class="prelude-ty">Option</span>&lt;u32&gt;,

     <span class="doccomment">/// Day of the month (1--28, 1--29, 1--30 or 1--31 depending on the month).
     </span><span class="kw">pub </span>day: <span class="prelude-ty">Option</span>&lt;u32&gt;,

     <span class="doccomment">/// Hour number divided by 12 (0--1). 0 indicates AM and 1 indicates PM.
     </span><span class="kw">pub </span>hour_div_12: <span class="prelude-ty">Option</span>&lt;u32&gt;,

     <span class="doccomment">/// Hour number modulo 12 (0--11).
     </span><span class="kw">pub </span>hour_mod_12: <span class="prelude-ty">Option</span>&lt;u32&gt;,

     <span class="doccomment">/// Minute number (0--59).
     </span><span class="kw">pub </span>minute: <span class="prelude-ty">Option</span>&lt;u32&gt;,

     <span class="doccomment">/// Second number (0--60, accounting for leap seconds).
     </span><span class="kw">pub </span>second: <span class="prelude-ty">Option</span>&lt;u32&gt;,

     <span class="doccomment">/// The number of nanoseconds since the whole second (0--999,999,999).
     </span><span class="kw">pub </span>nanosecond: <span class="prelude-ty">Option</span>&lt;u32&gt;,

     <span class="doccomment">/// The number of non-leap seconds since the midnight UTC on January 1, 1970.
     ///
     /// This can be off by one if [`second`](#structfield.second) is 60 (a leap second).
     </span><span class="kw">pub </span>timestamp: <span class="prelude-ty">Option</span>&lt;i64&gt;,

     <span class="doccomment">/// Offset from the local time to UTC, in seconds.
     </span><span class="kw">pub </span>offset: <span class="prelude-ty">Option</span>&lt;i32&gt;,

     <span class="doccomment">/// A dummy field to make this type not fully destructible (required for API stability).
     </span><span class="comment">// TODO: Change this to `#[non_exhaustive]` (on the enum) with the next breaking release.
     </span>_dummy: (),
 }

 <span class="doccomment">/// Checks if `old` is either empty or has the same value as `new` (i.e. &quot;consistent&quot;),
 /// and if it is empty, set `old` to `new` as well.
 </span><span class="attribute">#[inline]
 </span><span class="kw">fn </span>set_if_consistent&lt;T: PartialEq&gt;(old: <span class="kw-2">&amp;mut </span><span class="prelude-ty">Option</span>&lt;T&gt;, new: T) -&gt; ParseResult&lt;()&gt; {
     <span class="kw">if let </span><span class="prelude-val">Some</span>(<span class="kw-2">ref </span>old) = <span class="kw-2">*</span>old {
         <span class="kw">if </span><span class="kw-2">*</span>old == new {
             <span class="prelude-val">Ok</span>(())
         } <span class="kw">else </span>{
             <span class="prelude-val">Err</span>(IMPOSSIBLE)
         }
     } <span class="kw">else </span>{
         <span class="kw-2">*</span>old = <span class="prelude-val">Some</span>(new);
         <span class="prelude-val">Ok</span>(())
     }
 }

 <span class="kw">impl </span>Parsed {
     <span class="doccomment">/// Returns the initial value of parsed parts.
     </span><span class="attribute">#[must_use]
     </span><span class="kw">pub fn </span>new() -&gt; Parsed {
         Parsed::default()
     }

     <span class="doccomment">/// Tries to set the [`year`](#structfield.year) field from given value.
     </span><span class="attribute">#[inline]
     </span><span class="kw">pub fn </span>set_year(<span class="kw-2">&amp;mut </span><span class="self">self</span>, value: i64) -&gt; ParseResult&lt;()&gt; {
         set_if_consistent(<span class="kw-2">&amp;mut </span><span class="self">self</span>.year, i32::try_from(value).map_err(|<span class="kw">_</span>| OUT_OF_RANGE)<span class="question-mark">?</span>)
     }

     <span class="doccomment">/// Tries to set the [`year_div_100`](#structfield.year_div_100) field from given value.
     </span><span class="attribute">#[inline]
     </span><span class="kw">pub fn </span>set_year_div_100(<span class="kw-2">&amp;mut </span><span class="self">self</span>, value: i64) -&gt; ParseResult&lt;()&gt; {
         <span class="kw">if </span>value &lt; <span class="number">0 </span>{
             <span class="kw">return </span><span class="prelude-val">Err</span>(OUT_OF_RANGE);
         }
         set_if_consistent(<span class="kw-2">&amp;mut </span><span class="self">self</span>.year_div_100, i32::try_from(value).map_err(|<span class="kw">_</span>| OUT_OF_RANGE)<span class="question-mark">?</span>)
     }

     <span class="doccomment">/// Tries to set the [`year_mod_100`](#structfield.year_mod_100) field from given value.
     </span><span class="attribute">#[inline]
     </span><span class="kw">pub fn </span>set_year_mod_100(<span class="kw-2">&amp;mut </span><span class="self">self</span>, value: i64) -&gt; ParseResult&lt;()&gt; {
         <span class="kw">if </span>value &lt; <span class="number">0 </span>{
             <span class="kw">return </span><span class="prelude-val">Err</span>(OUT_OF_RANGE);
         }
         set_if_consistent(<span class="kw-2">&amp;mut </span><span class="self">self</span>.year_mod_100, i32::try_from(value).map_err(|<span class="kw">_</span>| OUT_OF_RANGE)<span class="question-mark">?</span>)
     }

     <span class="doccomment">/// Tries to set the [`isoyear`](#structfield.isoyear) field from given value.
     </span><span class="attribute">#[inline]
     </span><span class="kw">pub fn </span>set_isoyear(<span class="kw-2">&amp;mut </span><span class="self">self</span>, value: i64) -&gt; ParseResult&lt;()&gt; {
         set_if_consistent(<span class="kw-2">&amp;mut </span><span class="self">self</span>.isoyear, i32::try_from(value).map_err(|<span class="kw">_</span>| OUT_OF_RANGE)<span class="question-mark">?</span>)
     }

     <span class="doccomment">/// Tries to set the [`isoyear_div_100`](#structfield.isoyear_div_100) field from given value.
     </span><span class="attribute">#[inline]
     </span><span class="kw">pub fn </span>set_isoyear_div_100(<span class="kw-2">&amp;mut </span><span class="self">self</span>, value: i64) -&gt; ParseResult&lt;()&gt; {
         <span class="kw">if </span>value &lt; <span class="number">0 </span>{
             <span class="kw">return </span><span class="prelude-val">Err</span>(OUT_OF_RANGE);
         }
         set_if_consistent(
             <span class="kw-2">&amp;mut </span><span class="self">self</span>.isoyear_div_100,
             i32::try_from(value).map_err(|<span class="kw">_</span>| OUT_OF_RANGE)<span class="question-mark">?</span>,
         )
     }

     <span class="doccomment">/// Tries to set the [`isoyear_mod_100`](#structfield.isoyear_mod_100) field from given value.
     </span><span class="attribute">#[inline]
     </span><span class="kw">pub fn </span>set_isoyear_mod_100(<span class="kw-2">&amp;mut </span><span class="self">self</span>, value: i64) -&gt; ParseResult&lt;()&gt; {
         <span class="kw">if </span>value &lt; <span class="number">0 </span>{
             <span class="kw">return </span><span class="prelude-val">Err</span>(OUT_OF_RANGE);
         }
         set_if_consistent(
             <span class="kw-2">&amp;mut </span><span class="self">self</span>.isoyear_mod_100,
             i32::try_from(value).map_err(|<span class="kw">_</span>| OUT_OF_RANGE)<span class="question-mark">?</span>,
         )
     }

     <span class="doccomment">/// Tries to set the [`month`](#structfield.month) field from given value.
     </span><span class="attribute">#[inline]
     </span><span class="kw">pub fn </span>set_month(<span class="kw-2">&amp;mut </span><span class="self">self</span>, value: i64) -&gt; ParseResult&lt;()&gt; {
         set_if_consistent(<span class="kw-2">&amp;mut </span><span class="self">self</span>.month, u32::try_from(value).map_err(|<span class="kw">_</span>| OUT_OF_RANGE)<span class="question-mark">?</span>)
     }

     <span class="doccomment">/// Tries to set the [`week_from_sun`](#structfield.week_from_sun) field from given value.
     </span><span class="attribute">#[inline]
     </span><span class="kw">pub fn </span>set_week_from_sun(<span class="kw-2">&amp;mut </span><span class="self">self</span>, value: i64) -&gt; ParseResult&lt;()&gt; {
         set_if_consistent(<span class="kw-2">&amp;mut </span><span class="self">self</span>.week_from_sun, u32::try_from(value).map_err(|<span class="kw">_</span>| OUT_OF_RANGE)<span class="question-mark">?</span>)
     }

     <span class="doccomment">/// Tries to set the [`week_from_mon`](#structfield.week_from_mon) field from given value.
     </span><span class="attribute">#[inline]
     </span><span class="kw">pub fn </span>set_week_from_mon(<span class="kw-2">&amp;mut </span><span class="self">self</span>, value: i64) -&gt; ParseResult&lt;()&gt; {
         set_if_consistent(<span class="kw-2">&amp;mut </span><span class="self">self</span>.week_from_mon, u32::try_from(value).map_err(|<span class="kw">_</span>| OUT_OF_RANGE)<span class="question-mark">?</span>)
     }

     <span class="doccomment">/// Tries to set the [`isoweek`](#structfield.isoweek) field from given value.
     </span><span class="attribute">#[inline]
     </span><span class="kw">pub fn </span>set_isoweek(<span class="kw-2">&amp;mut </span><span class="self">self</span>, value: i64) -&gt; ParseResult&lt;()&gt; {
         set_if_consistent(<span class="kw-2">&amp;mut </span><span class="self">self</span>.isoweek, u32::try_from(value).map_err(|<span class="kw">_</span>| OUT_OF_RANGE)<span class="question-mark">?</span>)
     }

     <span class="doccomment">/// Tries to set the [`weekday`](#structfield.weekday) field from given value.
     </span><span class="attribute">#[inline]
     </span><span class="kw">pub fn </span>set_weekday(<span class="kw-2">&amp;mut </span><span class="self">self</span>, value: Weekday) -&gt; ParseResult&lt;()&gt; {
         set_if_consistent(<span class="kw-2">&amp;mut </span><span class="self">self</span>.weekday, value)
     }

     <span class="doccomment">/// Tries to set the [`ordinal`](#structfield.ordinal) field from given value.
     </span><span class="attribute">#[inline]
     </span><span class="kw">pub fn </span>set_ordinal(<span class="kw-2">&amp;mut </span><span class="self">self</span>, value: i64) -&gt; ParseResult&lt;()&gt; {
         set_if_consistent(<span class="kw-2">&amp;mut </span><span class="self">self</span>.ordinal, u32::try_from(value).map_err(|<span class="kw">_</span>| OUT_OF_RANGE)<span class="question-mark">?</span>)
     }

     <span class="doccomment">/// Tries to set the [`day`](#structfield.day) field from given value.
     </span><span class="attribute">#[inline]
     </span><span class="kw">pub fn </span>set_day(<span class="kw-2">&amp;mut </span><span class="self">self</span>, value: i64) -&gt; ParseResult&lt;()&gt; {
         set_if_consistent(<span class="kw-2">&amp;mut </span><span class="self">self</span>.day, u32::try_from(value).map_err(|<span class="kw">_</span>| OUT_OF_RANGE)<span class="question-mark">?</span>)
     }

     <span class="doccomment">/// Tries to set the [`hour_div_12`](#structfield.hour_div_12) field from given value.
     /// (`false` for AM, `true` for PM)
     </span><span class="attribute">#[inline]
     </span><span class="kw">pub fn </span>set_ampm(<span class="kw-2">&amp;mut </span><span class="self">self</span>, value: bool) -&gt; ParseResult&lt;()&gt; {
         set_if_consistent(<span class="kw-2">&amp;mut </span><span class="self">self</span>.hour_div_12, u32::from(value))
     }

     <span class="doccomment">/// Tries to set the [`hour_mod_12`](#structfield.hour_mod_12) field from
     /// given hour number in 12-hour clocks.
     </span><span class="attribute">#[inline]
     </span><span class="kw">pub fn </span>set_hour12(<span class="kw-2">&amp;mut </span><span class="self">self</span>, value: i64) -&gt; ParseResult&lt;()&gt; {
         <span class="kw">if </span>!(<span class="number">1</span>..=<span class="number">12</span>).contains(<span class="kw-2">&amp;</span>value) {
             <span class="kw">return </span><span class="prelude-val">Err</span>(OUT_OF_RANGE);
         }
         set_if_consistent(<span class="kw-2">&amp;mut </span><span class="self">self</span>.hour_mod_12, value <span class="kw">as </span>u32 % <span class="number">12</span>)
     }

     <span class="doccomment">/// Tries to set both [`hour_div_12`](#structfield.hour_div_12) and
     /// [`hour_mod_12`](#structfield.hour_mod_12) fields from given value.
     </span><span class="attribute">#[inline]
     </span><span class="kw">pub fn </span>set_hour(<span class="kw-2">&amp;mut </span><span class="self">self</span>, value: i64) -&gt; ParseResult&lt;()&gt; {
         <span class="kw">let </span>v = u32::try_from(value).map_err(|<span class="kw">_</span>| OUT_OF_RANGE)<span class="question-mark">?</span>;
         set_if_consistent(<span class="kw-2">&amp;mut </span><span class="self">self</span>.hour_div_12, v / <span class="number">12</span>)<span class="question-mark">?</span>;
         set_if_consistent(<span class="kw-2">&amp;mut </span><span class="self">self</span>.hour_mod_12, v % <span class="number">12</span>)<span class="question-mark">?</span>;
         <span class="prelude-val">Ok</span>(())
     }

     <span class="doccomment">/// Tries to set the [`minute`](#structfield.minute) field from given value.
     </span><span class="attribute">#[inline]
     </span><span class="kw">pub fn </span>set_minute(<span class="kw-2">&amp;mut </span><span class="self">self</span>, value: i64) -&gt; ParseResult&lt;()&gt; {
         set_if_consistent(<span class="kw-2">&amp;mut </span><span class="self">self</span>.minute, u32::try_from(value).map_err(|<span class="kw">_</span>| OUT_OF_RANGE)<span class="question-mark">?</span>)
     }

     <span class="doccomment">/// Tries to set the [`second`](#structfield.second) field from given value.
     </span><span class="attribute">#[inline]
     </span><span class="kw">pub fn </span>set_second(<span class="kw-2">&amp;mut </span><span class="self">self</span>, value: i64) -&gt; ParseResult&lt;()&gt; {
         set_if_consistent(<span class="kw-2">&amp;mut </span><span class="self">self</span>.second, u32::try_from(value).map_err(|<span class="kw">_</span>| OUT_OF_RANGE)<span class="question-mark">?</span>)
     }

     <span class="doccomment">/// Tries to set the [`nanosecond`](#structfield.nanosecond) field from given value.
     </span><span class="attribute">#[inline]
     </span><span class="kw">pub fn </span>set_nanosecond(<span class="kw-2">&amp;mut </span><span class="self">self</span>, value: i64) -&gt; ParseResult&lt;()&gt; {
         set_if_consistent(<span class="kw-2">&amp;mut </span><span class="self">self</span>.nanosecond, u32::try_from(value).map_err(|<span class="kw">_</span>| OUT_OF_RANGE)<span class="question-mark">?</span>)
     }

     <span class="doccomment">/// Tries to set the [`timestamp`](#structfield.timestamp) field from given value.
     </span><span class="attribute">#[inline]
     </span><span class="kw">pub fn </span>set_timestamp(<span class="kw-2">&amp;mut </span><span class="self">self</span>, value: i64) -&gt; ParseResult&lt;()&gt; {
         set_if_consistent(<span class="kw-2">&amp;mut </span><span class="self">self</span>.timestamp, value)
     }

     <span class="doccomment">/// Tries to set the [`offset`](#structfield.offset) field from given value.
     </span><span class="attribute">#[inline]
     </span><span class="kw">pub fn </span>set_offset(<span class="kw-2">&amp;mut </span><span class="self">self</span>, value: i64) -&gt; ParseResult&lt;()&gt; {
         set_if_consistent(<span class="kw-2">&amp;mut </span><span class="self">self</span>.offset, i32::try_from(value).map_err(|<span class="kw">_</span>| OUT_OF_RANGE)<span class="question-mark">?</span>)
     }

     <span class="doccomment">/// Returns a parsed naive date out of given fields.
     ///
     /// This method is able to determine the date from given subset of fields:
     ///
     /// - Year, month, day.
     /// - Year, day of the year (ordinal).
     /// - Year, week number counted from Sunday or Monday, day of the week.
     /// - ISO week date.
     ///
     /// Gregorian year and ISO week date year can have their century number (`*_div_100`) omitted,
     /// the two-digit year is used to guess the century number then.
     </span><span class="kw">pub fn </span>to_naive_date(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; ParseResult&lt;NaiveDate&gt; {
         <span class="kw">fn </span>resolve_year(
             y: <span class="prelude-ty">Option</span>&lt;i32&gt;,
             q: <span class="prelude-ty">Option</span>&lt;i32&gt;,
             r: <span class="prelude-ty">Option</span>&lt;i32&gt;,
         ) -&gt; ParseResult&lt;<span class="prelude-ty">Option</span>&lt;i32&gt;&gt; {
             <span class="kw">match </span>(y, q, r) {
                 <span class="comment">// if there is no further information, simply return the given full year.
                 // this is a common case, so let&#39;s avoid division here.
                 </span>(y, <span class="prelude-val">None</span>, <span class="prelude-val">None</span>) =&gt; <span class="prelude-val">Ok</span>(y),

                 <span class="comment">// if there is a full year *and* also quotient and/or modulo,
                 // check if present quotient and/or modulo is consistent to the full year.
                 // since the presence of those fields means a positive full year,
                 // we should filter a negative full year first.
                 </span>(<span class="prelude-val">Some</span>(y), q, r @ <span class="prelude-val">Some</span>(<span class="number">0</span>..=<span class="number">99</span>)) | (<span class="prelude-val">Some</span>(y), q, r @ <span class="prelude-val">None</span>) =&gt; {
                     <span class="kw">if </span>y &lt; <span class="number">0 </span>{
                         <span class="kw">return </span><span class="prelude-val">Err</span>(OUT_OF_RANGE);
                     }
                     <span class="kw">let </span>q_ = y / <span class="number">100</span>;
                     <span class="kw">let </span>r_ = y % <span class="number">100</span>;
                     <span class="kw">if </span>q.unwrap_or(q_) == q_ &amp;&amp; r.unwrap_or(r_) == r_ {
                         <span class="prelude-val">Ok</span>(<span class="prelude-val">Some</span>(y))
                     } <span class="kw">else </span>{
                         <span class="prelude-val">Err</span>(IMPOSSIBLE)
                     }
                 }

                 <span class="comment">// the full year is missing but we have quotient and modulo.
                 // reconstruct the full year. make sure that the result is always positive.
                 </span>(<span class="prelude-val">None</span>, <span class="prelude-val">Some</span>(q), <span class="prelude-val">Some</span>(r @ <span class="number">0</span>..=<span class="number">99</span>)) =&gt; {
                     <span class="kw">if </span>q &lt; <span class="number">0 </span>{
                         <span class="kw">return </span><span class="prelude-val">Err</span>(OUT_OF_RANGE);
                     }
                     <span class="kw">let </span>y = q.checked_mul(<span class="number">100</span>).and_then(|v| v.checked_add(r));
                     <span class="prelude-val">Ok</span>(<span class="prelude-val">Some</span>(y.ok_or(OUT_OF_RANGE)<span class="question-mark">?</span>))
                 }

                 <span class="comment">// we only have modulo. try to interpret a modulo as a conventional two-digit year.
                 // note: we are affected by Rust issue #18060. avoid multiple range patterns.
                 </span>(<span class="prelude-val">None</span>, <span class="prelude-val">None</span>, <span class="prelude-val">Some</span>(r @ <span class="number">0</span>..=<span class="number">99</span>)) =&gt; <span class="prelude-val">Ok</span>(<span class="prelude-val">Some</span>(r + <span class="kw">if </span>r &lt; <span class="number">70 </span>{ <span class="number">2000 </span>} <span class="kw">else </span>{ <span class="number">1900 </span>})),

                 <span class="comment">// otherwise it is an out-of-bound or insufficient condition.
                 </span>(<span class="prelude-val">None</span>, <span class="prelude-val">Some</span>(<span class="kw">_</span>), <span class="prelude-val">None</span>) =&gt; <span class="prelude-val">Err</span>(NOT_ENOUGH),
                 (<span class="kw">_</span>, <span class="kw">_</span>, <span class="prelude-val">Some</span>(<span class="kw">_</span>)) =&gt; <span class="prelude-val">Err</span>(OUT_OF_RANGE),
             }
         }

         <span class="kw">let </span>given_year = resolve_year(<span class="self">self</span>.year, <span class="self">self</span>.year_div_100, <span class="self">self</span>.year_mod_100)<span class="question-mark">?</span>;
         <span class="kw">let </span>given_isoyear = resolve_year(<span class="self">self</span>.isoyear, <span class="self">self</span>.isoyear_div_100, <span class="self">self</span>.isoyear_mod_100)<span class="question-mark">?</span>;

         <span class="comment">// verify the normal year-month-day date.
         </span><span class="kw">let </span>verify_ymd = |date: NaiveDate| {
             <span class="kw">let </span>year = date.year();
             <span class="kw">let </span>(year_div_100, year_mod_100) = <span class="kw">if </span>year &gt;= <span class="number">0 </span>{
                 (<span class="prelude-val">Some</span>(year / <span class="number">100</span>), <span class="prelude-val">Some</span>(year % <span class="number">100</span>))
             } <span class="kw">else </span>{
                 (<span class="prelude-val">None</span>, <span class="prelude-val">None</span>) <span class="comment">// they should be empty to be consistent
             </span>};
             <span class="kw">let </span>month = date.month();
             <span class="kw">let </span>day = date.day();
             <span class="self">self</span>.year.unwrap_or(year) == year
                 &amp;&amp; <span class="self">self</span>.year_div_100.or(year_div_100) == year_div_100
                 &amp;&amp; <span class="self">self</span>.year_mod_100.or(year_mod_100) == year_mod_100
                 &amp;&amp; <span class="self">self</span>.month.unwrap_or(month) == month
                 &amp;&amp; <span class="self">self</span>.day.unwrap_or(day) == day
         };

         <span class="comment">// verify the ISO week date.
         </span><span class="kw">let </span>verify_isoweekdate = |date: NaiveDate| {
             <span class="kw">let </span>week = date.iso_week();
             <span class="kw">let </span>isoyear = week.year();
             <span class="kw">let </span>isoweek = week.week();
             <span class="kw">let </span>weekday = date.weekday();
             <span class="kw">let </span>(isoyear_div_100, isoyear_mod_100) = <span class="kw">if </span>isoyear &gt;= <span class="number">0 </span>{
                 (<span class="prelude-val">Some</span>(isoyear / <span class="number">100</span>), <span class="prelude-val">Some</span>(isoyear % <span class="number">100</span>))
             } <span class="kw">else </span>{
                 (<span class="prelude-val">None</span>, <span class="prelude-val">None</span>) <span class="comment">// they should be empty to be consistent
             </span>};
             <span class="self">self</span>.isoyear.unwrap_or(isoyear) == isoyear
                 &amp;&amp; <span class="self">self</span>.isoyear_div_100.or(isoyear_div_100) == isoyear_div_100
                 &amp;&amp; <span class="self">self</span>.isoyear_mod_100.or(isoyear_mod_100) == isoyear_mod_100
                 &amp;&amp; <span class="self">self</span>.isoweek.unwrap_or(isoweek) == isoweek
                 &amp;&amp; <span class="self">self</span>.weekday.unwrap_or(weekday) == weekday
         };

         <span class="comment">// verify the ordinal and other (non-ISO) week dates.
         </span><span class="kw">let </span>verify_ordinal = |date: NaiveDate| {
             <span class="kw">let </span>ordinal = date.ordinal();
             <span class="kw">let </span>week_from_sun = date.weeks_from(Weekday::Sun);
             <span class="kw">let </span>week_from_mon = date.weeks_from(Weekday::Mon);
             <span class="self">self</span>.ordinal.unwrap_or(ordinal) == ordinal
                 &amp;&amp; <span class="self">self</span>.week_from_sun.map_or(week_from_sun, |v| v <span class="kw">as </span>i32) == week_from_sun
                 &amp;&amp; <span class="self">self</span>.week_from_mon.map_or(week_from_mon, |v| v <span class="kw">as </span>i32) == week_from_mon
         };

         <span class="comment">// test several possibilities.
         // tries to construct a full `NaiveDate` as much as possible, then verifies that
         // it is consistent with other given fields.
         </span><span class="kw">let </span>(verified, parsed_date) = <span class="kw">match </span>(given_year, given_isoyear, <span class="self">self</span>) {
             (<span class="prelude-val">Some</span>(year), <span class="kw">_</span>, <span class="kw-2">&amp;</span>Parsed { month: <span class="prelude-val">Some</span>(month), day: <span class="prelude-val">Some</span>(day), .. }) =&gt; {
                 <span class="comment">// year, month, day
                 </span><span class="kw">let </span>date = NaiveDate::from_ymd_opt(year, month, day).ok_or(OUT_OF_RANGE)<span class="question-mark">?</span>;
                 (verify_isoweekdate(date) &amp;&amp; verify_ordinal(date), date)
             }

             (<span class="prelude-val">Some</span>(year), <span class="kw">_</span>, <span class="kw-2">&amp;</span>Parsed { ordinal: <span class="prelude-val">Some</span>(ordinal), .. }) =&gt; {
                 <span class="comment">// year, day of the year
                 </span><span class="kw">let </span>date = NaiveDate::from_yo_opt(year, ordinal).ok_or(OUT_OF_RANGE)<span class="question-mark">?</span>;
                 (verify_ymd(date) &amp;&amp; verify_isoweekdate(date) &amp;&amp; verify_ordinal(date), date)
             }

             (
                 <span class="prelude-val">Some</span>(year),
                 <span class="kw">_</span>,
                 <span class="kw-2">&amp;</span>Parsed { week_from_sun: <span class="prelude-val">Some</span>(week_from_sun), weekday: <span class="prelude-val">Some</span>(weekday), .. },
             ) =&gt; {
                 <span class="comment">// year, week (starting at 1st Sunday), day of the week
                 </span><span class="kw">let </span>newyear = NaiveDate::from_yo_opt(year, <span class="number">1</span>).ok_or(OUT_OF_RANGE)<span class="question-mark">?</span>;
                 <span class="kw">let </span>firstweek = <span class="kw">match </span>newyear.weekday() {
                     Weekday::Sun =&gt; <span class="number">0</span>,
                     Weekday::Mon =&gt; <span class="number">6</span>,
                     Weekday::Tue =&gt; <span class="number">5</span>,
                     Weekday::Wed =&gt; <span class="number">4</span>,
                     Weekday::Thu =&gt; <span class="number">3</span>,
                     Weekday::Fri =&gt; <span class="number">2</span>,
                     Weekday::Sat =&gt; <span class="number">1</span>,
                 };

                 <span class="comment">// `firstweek+1`-th day of January is the beginning of the week 1.
                 </span><span class="kw">if </span>week_from_sun &gt; <span class="number">53 </span>{
                     <span class="kw">return </span><span class="prelude-val">Err</span>(OUT_OF_RANGE);
                 } <span class="comment">// can it overflow?
                 </span><span class="kw">let </span>ndays = firstweek
                     + (week_from_sun <span class="kw">as </span>i32 - <span class="number">1</span>) * <span class="number">7
                     </span>+ weekday.num_days_from_sunday() <span class="kw">as </span>i32;
                 <span class="kw">let </span>date = newyear
                     .checked_add_signed(OldDuration::days(i64::from(ndays)))
                     .ok_or(OUT_OF_RANGE)<span class="question-mark">?</span>;
                 <span class="kw">if </span>date.year() != year {
                     <span class="kw">return </span><span class="prelude-val">Err</span>(OUT_OF_RANGE);
                 } <span class="comment">// early exit for correct error

                 </span>(verify_ymd(date) &amp;&amp; verify_isoweekdate(date) &amp;&amp; verify_ordinal(date), date)
             }

             (
                 <span class="prelude-val">Some</span>(year),
                 <span class="kw">_</span>,
                 <span class="kw-2">&amp;</span>Parsed { week_from_mon: <span class="prelude-val">Some</span>(week_from_mon), weekday: <span class="prelude-val">Some</span>(weekday), .. },
             ) =&gt; {
                 <span class="comment">// year, week (starting at 1st Monday), day of the week
                 </span><span class="kw">let </span>newyear = NaiveDate::from_yo_opt(year, <span class="number">1</span>).ok_or(OUT_OF_RANGE)<span class="question-mark">?</span>;
                 <span class="kw">let </span>firstweek = <span class="kw">match </span>newyear.weekday() {
                     Weekday::Sun =&gt; <span class="number">1</span>,
                     Weekday::Mon =&gt; <span class="number">0</span>,
                     Weekday::Tue =&gt; <span class="number">6</span>,
                     Weekday::Wed =&gt; <span class="number">5</span>,
                     Weekday::Thu =&gt; <span class="number">4</span>,
                     Weekday::Fri =&gt; <span class="number">3</span>,
                     Weekday::Sat =&gt; <span class="number">2</span>,
                 };

                 <span class="comment">// `firstweek+1`-th day of January is the beginning of the week 1.
                 </span><span class="kw">if </span>week_from_mon &gt; <span class="number">53 </span>{
                     <span class="kw">return </span><span class="prelude-val">Err</span>(OUT_OF_RANGE);
                 } <span class="comment">// can it overflow?
                 </span><span class="kw">let </span>ndays = firstweek
                     + (week_from_mon <span class="kw">as </span>i32 - <span class="number">1</span>) * <span class="number">7
                     </span>+ weekday.num_days_from_monday() <span class="kw">as </span>i32;
                 <span class="kw">let </span>date = newyear
                     .checked_add_signed(OldDuration::days(i64::from(ndays)))
                     .ok_or(OUT_OF_RANGE)<span class="question-mark">?</span>;
                 <span class="kw">if </span>date.year() != year {
                     <span class="kw">return </span><span class="prelude-val">Err</span>(OUT_OF_RANGE);
                 } <span class="comment">// early exit for correct error

                 </span>(verify_ymd(date) &amp;&amp; verify_isoweekdate(date) &amp;&amp; verify_ordinal(date), date)
             }

             (<span class="kw">_</span>, <span class="prelude-val">Some</span>(isoyear), <span class="kw-2">&amp;</span>Parsed { isoweek: <span class="prelude-val">Some</span>(isoweek), weekday: <span class="prelude-val">Some</span>(weekday), .. }) =&gt; {
                 <span class="comment">// ISO year, week, day of the week
                 </span><span class="kw">let </span>date = NaiveDate::from_isoywd_opt(isoyear, isoweek, weekday);
                 <span class="kw">let </span>date = date.ok_or(OUT_OF_RANGE)<span class="question-mark">?</span>;
                 (verify_ymd(date) &amp;&amp; verify_ordinal(date), date)
             }

             (<span class="kw">_</span>, <span class="kw">_</span>, <span class="kw">_</span>) =&gt; <span class="kw">return </span><span class="prelude-val">Err</span>(NOT_ENOUGH),
         };

         <span class="kw">if </span>verified {
             <span class="prelude-val">Ok</span>(parsed_date)
         } <span class="kw">else </span>{
             <span class="prelude-val">Err</span>(IMPOSSIBLE)
         }
     }

     <span class="doccomment">/// Returns a parsed naive time out of given fields.
     ///
     /// This method is able to determine the time from given subset of fields:
     ///
     /// - Hour, minute. (second and nanosecond assumed to be 0)
     /// - Hour, minute, second. (nanosecond assumed to be 0)
     /// - Hour, minute, second, nanosecond.
     ///
     /// It is able to handle leap seconds when given second is 60.
     </span><span class="kw">pub fn </span>to_naive_time(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; ParseResult&lt;NaiveTime&gt; {
         <span class="kw">let </span>hour_div_12 = <span class="kw">match </span><span class="self">self</span>.hour_div_12 {
             <span class="prelude-val">Some</span>(v @ <span class="number">0</span>..=<span class="number">1</span>) =&gt; v,
             <span class="prelude-val">Some</span>(<span class="kw">_</span>) =&gt; <span class="kw">return </span><span class="prelude-val">Err</span>(OUT_OF_RANGE),
             <span class="prelude-val">None </span>=&gt; <span class="kw">return </span><span class="prelude-val">Err</span>(NOT_ENOUGH),
         };
         <span class="kw">let </span>hour_mod_12 = <span class="kw">match </span><span class="self">self</span>.hour_mod_12 {
             <span class="prelude-val">Some</span>(v @ <span class="number">0</span>..=<span class="number">11</span>) =&gt; v,
             <span class="prelude-val">Some</span>(<span class="kw">_</span>) =&gt; <span class="kw">return </span><span class="prelude-val">Err</span>(OUT_OF_RANGE),
             <span class="prelude-val">None </span>=&gt; <span class="kw">return </span><span class="prelude-val">Err</span>(NOT_ENOUGH),
         };
         <span class="kw">let </span>hour = hour_div_12 * <span class="number">12 </span>+ hour_mod_12;

         <span class="kw">let </span>minute = <span class="kw">match </span><span class="self">self</span>.minute {
             <span class="prelude-val">Some</span>(v @ <span class="number">0</span>..=<span class="number">59</span>) =&gt; v,
             <span class="prelude-val">Some</span>(<span class="kw">_</span>) =&gt; <span class="kw">return </span><span class="prelude-val">Err</span>(OUT_OF_RANGE),
             <span class="prelude-val">None </span>=&gt; <span class="kw">return </span><span class="prelude-val">Err</span>(NOT_ENOUGH),
         };

         <span class="comment">// we allow omitting seconds or nanoseconds, but they should be in the range.
         </span><span class="kw">let </span>(second, <span class="kw-2">mut </span>nano) = <span class="kw">match </span><span class="self">self</span>.second.unwrap_or(<span class="number">0</span>) {
             v @ <span class="number">0</span>..=<span class="number">59 </span>=&gt; (v, <span class="number">0</span>),
             <span class="number">60 </span>=&gt; (<span class="number">59</span>, <span class="number">1_000_000_000</span>),
             <span class="kw">_ </span>=&gt; <span class="kw">return </span><span class="prelude-val">Err</span>(OUT_OF_RANGE),
         };
         nano += <span class="kw">match </span><span class="self">self</span>.nanosecond {
             <span class="prelude-val">Some</span>(v @ <span class="number">0</span>..=<span class="number">999_999_999</span>) <span class="kw">if </span><span class="self">self</span>.second.is_some() =&gt; v,
             <span class="prelude-val">Some</span>(<span class="number">0</span>..=<span class="number">999_999_999</span>) =&gt; <span class="kw">return </span><span class="prelude-val">Err</span>(NOT_ENOUGH), <span class="comment">// second is missing
             </span><span class="prelude-val">Some</span>(<span class="kw">_</span>) =&gt; <span class="kw">return </span><span class="prelude-val">Err</span>(OUT_OF_RANGE),
             <span class="prelude-val">None </span>=&gt; <span class="number">0</span>,
         };

         NaiveTime::from_hms_nano_opt(hour, minute, second, nano).ok_or(OUT_OF_RANGE)
     }

     <span class="doccomment">/// Returns a parsed naive date and time out of given fields,
     /// except for the [`offset`](#structfield.offset) field (assumed to have a given value).
     /// This is required for parsing a local time or other known-timezone inputs.
     ///
     /// This method is able to determine the combined date and time
     /// from date and time fields or a single [`timestamp`](#structfield.timestamp) field.
     /// Either way those fields have to be consistent to each other.
     </span><span class="kw">pub fn </span>to_naive_datetime_with_offset(<span class="kw-2">&amp;</span><span class="self">self</span>, offset: i32) -&gt; ParseResult&lt;NaiveDateTime&gt; {
         <span class="kw">let </span>date = <span class="self">self</span>.to_naive_date();
         <span class="kw">let </span>time = <span class="self">self</span>.to_naive_time();
         <span class="kw">if let </span>(<span class="prelude-val">Ok</span>(date), <span class="prelude-val">Ok</span>(time)) = (date, time) {
             <span class="kw">let </span>datetime = date.and_time(time);

             <span class="comment">// verify the timestamp field if any
             // the following is safe, `timestamp` is very limited in range
             </span><span class="kw">let </span>timestamp = datetime.timestamp() - i64::from(offset);
             <span class="kw">if let </span><span class="prelude-val">Some</span>(given_timestamp) = <span class="self">self</span>.timestamp {
                 <span class="comment">// if `datetime` represents a leap second, it might be off by one second.
                 </span><span class="kw">if </span>given_timestamp != timestamp
                     &amp;&amp; !(datetime.nanosecond() &gt;= <span class="number">1_000_000_000 </span>&amp;&amp; given_timestamp == timestamp + <span class="number">1</span>)
                 {
                     <span class="kw">return </span><span class="prelude-val">Err</span>(IMPOSSIBLE);
                 }
             }

             <span class="prelude-val">Ok</span>(datetime)
         } <span class="kw">else if let </span><span class="prelude-val">Some</span>(timestamp) = <span class="self">self</span>.timestamp {
             <span class="kw">use </span><span class="kw">super</span>::ParseError <span class="kw">as </span>PE;
             <span class="kw">use </span><span class="kw">super</span>::ParseErrorKind::{Impossible, OutOfRange};

             <span class="comment">// if date and time is problematic already, there is no point proceeding.
             // we at least try to give a correct error though.
             </span><span class="kw">match </span>(date, time) {
                 (<span class="prelude-val">Err</span>(PE(OutOfRange)), <span class="kw">_</span>) | (<span class="kw">_</span>, <span class="prelude-val">Err</span>(PE(OutOfRange))) =&gt; <span class="kw">return </span><span class="prelude-val">Err</span>(OUT_OF_RANGE),
                 (<span class="prelude-val">Err</span>(PE(Impossible)), <span class="kw">_</span>) | (<span class="kw">_</span>, <span class="prelude-val">Err</span>(PE(Impossible))) =&gt; <span class="kw">return </span><span class="prelude-val">Err</span>(IMPOSSIBLE),
                 (<span class="kw">_</span>, <span class="kw">_</span>) =&gt; {} <span class="comment">// one of them is insufficient
             </span>}

             <span class="comment">// reconstruct date and time fields from timestamp
             </span><span class="kw">let </span>ts = timestamp.checked_add(i64::from(offset)).ok_or(OUT_OF_RANGE)<span class="question-mark">?</span>;
             <span class="kw">let </span>datetime = NaiveDateTime::from_timestamp_opt(ts, <span class="number">0</span>);
             <span class="kw">let </span><span class="kw-2">mut </span>datetime = datetime.ok_or(OUT_OF_RANGE)<span class="question-mark">?</span>;

             <span class="comment">// fill year, ordinal, hour, minute and second fields from timestamp.
             // if existing fields are consistent, this will allow the full date/time reconstruction.
             </span><span class="kw">let </span><span class="kw-2">mut </span>parsed = <span class="self">self</span>.clone();
             <span class="kw">if </span>parsed.second == <span class="prelude-val">Some</span>(<span class="number">60</span>) {
                 <span class="comment">// `datetime.second()` cannot be 60, so this is the only case for a leap second.
                 </span><span class="kw">match </span>datetime.second() {
                     <span class="comment">// it&#39;s okay, just do not try to overwrite the existing field.
                     </span><span class="number">59 </span>=&gt; {}
                     <span class="comment">// `datetime` is known to be off by one second.
                     </span><span class="number">0 </span>=&gt; {
                         datetime -= OldDuration::seconds(<span class="number">1</span>);
                     }
                     <span class="comment">// otherwise it is impossible.
                     </span><span class="kw">_ </span>=&gt; <span class="kw">return </span><span class="prelude-val">Err</span>(IMPOSSIBLE),
                 }
             <span class="comment">// ...and we have the correct candidates for other fields.
             </span>} <span class="kw">else </span>{
                 parsed.set_second(i64::from(datetime.second()))<span class="question-mark">?</span>;
             }
             parsed.set_year(i64::from(datetime.year()))<span class="question-mark">?</span>;
             parsed.set_ordinal(i64::from(datetime.ordinal()))<span class="question-mark">?</span>; <span class="comment">// more efficient than ymd
             </span>parsed.set_hour(i64::from(datetime.hour()))<span class="question-mark">?</span>;
             parsed.set_minute(i64::from(datetime.minute()))<span class="question-mark">?</span>;

             <span class="comment">// validate other fields (e.g. week) and return
             </span><span class="kw">let </span>date = parsed.to_naive_date()<span class="question-mark">?</span>;
             <span class="kw">let </span>time = parsed.to_naive_time()<span class="question-mark">?</span>;
             <span class="prelude-val">Ok</span>(date.and_time(time))
         } <span class="kw">else </span>{
             <span class="comment">// reproduce the previous error(s)
             </span>date<span class="question-mark">?</span>;
             time<span class="question-mark">?</span>;
             <span class="macro">unreachable!</span>()
         }
     }

     <span class="doccomment">/// Returns a parsed fixed time zone offset out of given fields.
     </span><span class="kw">pub fn </span>to_fixed_offset(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; ParseResult&lt;FixedOffset&gt; {
         <span class="self">self</span>.offset.and_then(FixedOffset::east_opt).ok_or(OUT_OF_RANGE)
     }

     <span class="doccomment">/// Returns a parsed timezone-aware date and time out of given fields.
     ///
     /// This method is able to determine the combined date and time
     /// from date and time fields or a single [`timestamp`](#structfield.timestamp) field,
     /// plus a time zone offset.
     /// Either way those fields have to be consistent to each other.
     </span><span class="kw">pub fn </span>to_datetime(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; ParseResult&lt;DateTime&lt;FixedOffset&gt;&gt; {
         <span class="kw">let </span>offset = <span class="self">self</span>.offset.ok_or(NOT_ENOUGH)<span class="question-mark">?</span>;
         <span class="kw">let </span>datetime = <span class="self">self</span>.to_naive_datetime_with_offset(offset)<span class="question-mark">?</span>;
         <span class="kw">let </span>offset = FixedOffset::east_opt(offset).ok_or(OUT_OF_RANGE)<span class="question-mark">?</span>;

         <span class="comment">// this is used to prevent an overflow when calling FixedOffset::from_local_datetime
         </span>datetime
             .checked_sub_signed(OldDuration::seconds(i64::from(offset.local_minus_utc())))
             .ok_or(OUT_OF_RANGE)<span class="question-mark">?</span>;

         <span class="kw">match </span>offset.from_local_datetime(<span class="kw-2">&amp;</span>datetime) {
             LocalResult::None =&gt; <span class="prelude-val">Err</span>(IMPOSSIBLE),
             LocalResult::Single(t) =&gt; <span class="prelude-val">Ok</span>(t),
             LocalResult::Ambiguous(..) =&gt; <span class="prelude-val">Err</span>(NOT_ENOUGH),
         }
     }

     <span class="doccomment">/// Returns a parsed timezone-aware date and time out of given fields,
     /// with an additional `TimeZone` used to interpret and validate the local date.
     ///
     /// This method is able to determine the combined date and time
     /// from date and time fields or a single [`timestamp`](#structfield.timestamp) field,
     /// plus a time zone offset.
     /// Either way those fields have to be consistent to each other.
     /// If parsed fields include an UTC offset, it also has to be consistent to
     /// [`offset`](#structfield.offset).
     </span><span class="kw">pub fn </span>to_datetime_with_timezone&lt;Tz: TimeZone&gt;(<span class="kw-2">&amp;</span><span class="self">self</span>, tz: <span class="kw-2">&amp;</span>Tz) -&gt; ParseResult&lt;DateTime&lt;Tz&gt;&gt; {
         <span class="comment">// if we have `timestamp` specified, guess an offset from that.
         </span><span class="kw">let </span><span class="kw-2">mut </span>guessed_offset = <span class="number">0</span>;
         <span class="kw">if let </span><span class="prelude-val">Some</span>(timestamp) = <span class="self">self</span>.timestamp {
             <span class="comment">// make a naive `DateTime` from given timestamp and (if any) nanosecond.
             // an empty `nanosecond` is always equal to zero, so missing nanosecond is fine.
             </span><span class="kw">let </span>nanosecond = <span class="self">self</span>.nanosecond.unwrap_or(<span class="number">0</span>);
             <span class="kw">let </span>dt = NaiveDateTime::from_timestamp_opt(timestamp, nanosecond);
             <span class="kw">let </span>dt = dt.ok_or(OUT_OF_RANGE)<span class="question-mark">?</span>;
             guessed_offset = tz.offset_from_utc_datetime(<span class="kw-2">&amp;</span>dt).fix().local_minus_utc();
         }

         <span class="comment">// checks if the given `DateTime` has a consistent `Offset` with given `self.offset`.
         </span><span class="kw">let </span>check_offset = |dt: <span class="kw-2">&amp;</span>DateTime&lt;Tz&gt;| {
             <span class="kw">if let </span><span class="prelude-val">Some</span>(offset) = <span class="self">self</span>.offset {
                 dt.offset().fix().local_minus_utc() == offset
             } <span class="kw">else </span>{
                 <span class="bool-val">true
             </span>}
         };

         <span class="comment">// `guessed_offset` should be correct when `self.timestamp` is given.
         // it will be 0 otherwise, but this is fine as the algorithm ignores offset for that case.
         </span><span class="kw">let </span>datetime = <span class="self">self</span>.to_naive_datetime_with_offset(guessed_offset)<span class="question-mark">?</span>;
         <span class="kw">match </span>tz.from_local_datetime(<span class="kw-2">&amp;</span>datetime) {
             LocalResult::None =&gt; <span class="prelude-val">Err</span>(IMPOSSIBLE),
             LocalResult::Single(t) =&gt; {
                 <span class="kw">if </span>check_offset(<span class="kw-2">&amp;</span>t) {
                     <span class="prelude-val">Ok</span>(t)
                 } <span class="kw">else </span>{
                     <span class="prelude-val">Err</span>(IMPOSSIBLE)
                 }
             }
             LocalResult::Ambiguous(min, max) =&gt; {
                 <span class="comment">// try to disambiguate two possible local dates by offset.
                 </span><span class="kw">match </span>(check_offset(<span class="kw-2">&amp;</span>min), check_offset(<span class="kw-2">&amp;</span>max)) {
                     (<span class="bool-val">false</span>, <span class="bool-val">false</span>) =&gt; <span class="prelude-val">Err</span>(IMPOSSIBLE),
                     (<span class="bool-val">false</span>, <span class="bool-val">true</span>) =&gt; <span class="prelude-val">Ok</span>(max),
                     (<span class="bool-val">true</span>, <span class="bool-val">false</span>) =&gt; <span class="prelude-val">Ok</span>(min),
                     (<span class="bool-val">true</span>, <span class="bool-val">true</span>) =&gt; <span class="prelude-val">Err</span>(NOT_ENOUGH),
                 }
             }
         }
     }
 }

 <span class="attribute">#[cfg(test)]
 </span><span class="kw">mod </span>tests {
     <span class="kw">use </span><span class="kw">super</span>::<span class="kw">super</span>::{IMPOSSIBLE, NOT_ENOUGH, OUT_OF_RANGE};
     <span class="kw">use </span><span class="kw">super</span>::Parsed;
     <span class="kw">use </span><span class="kw">crate</span>::naive::{NaiveDate, NaiveTime};
     <span class="kw">use </span><span class="kw">crate</span>::offset::{FixedOffset, TimeZone, Utc};
     <span class="kw">use </span><span class="kw">crate</span>::Datelike;
     <span class="kw">use </span><span class="kw">crate</span>::Weekday::<span class="kw-2">*</span>;

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>test_parsed_set_fields() {
         <span class="comment">// year*, isoyear*
         </span><span class="kw">let </span><span class="kw-2">mut </span>p = Parsed::new();
         <span class="macro">assert_eq!</span>(p.set_year(<span class="number">1987</span>), <span class="prelude-val">Ok</span>(()));
         <span class="macro">assert_eq!</span>(p.set_year(<span class="number">1986</span>), <span class="prelude-val">Err</span>(IMPOSSIBLE));
         <span class="macro">assert_eq!</span>(p.set_year(<span class="number">1988</span>), <span class="prelude-val">Err</span>(IMPOSSIBLE));
         <span class="macro">assert_eq!</span>(p.set_year(<span class="number">1987</span>), <span class="prelude-val">Ok</span>(()));
         <span class="macro">assert_eq!</span>(p.set_year_div_100(<span class="number">20</span>), <span class="prelude-val">Ok</span>(())); <span class="comment">// independent to `year`
         </span><span class="macro">assert_eq!</span>(p.set_year_div_100(<span class="number">21</span>), <span class="prelude-val">Err</span>(IMPOSSIBLE));
         <span class="macro">assert_eq!</span>(p.set_year_div_100(<span class="number">19</span>), <span class="prelude-val">Err</span>(IMPOSSIBLE));
         <span class="macro">assert_eq!</span>(p.set_year_mod_100(<span class="number">37</span>), <span class="prelude-val">Ok</span>(())); <span class="comment">// ditto
         </span><span class="macro">assert_eq!</span>(p.set_year_mod_100(<span class="number">38</span>), <span class="prelude-val">Err</span>(IMPOSSIBLE));
         <span class="macro">assert_eq!</span>(p.set_year_mod_100(<span class="number">36</span>), <span class="prelude-val">Err</span>(IMPOSSIBLE));

         <span class="kw">let </span><span class="kw-2">mut </span>p = Parsed::new();
         <span class="macro">assert_eq!</span>(p.set_year(<span class="number">0</span>), <span class="prelude-val">Ok</span>(()));
         <span class="macro">assert_eq!</span>(p.set_year_div_100(<span class="number">0</span>), <span class="prelude-val">Ok</span>(()));
         <span class="macro">assert_eq!</span>(p.set_year_mod_100(<span class="number">0</span>), <span class="prelude-val">Ok</span>(()));

         <span class="kw">let </span><span class="kw-2">mut </span>p = Parsed::new();
         <span class="macro">assert_eq!</span>(p.set_year_div_100(-<span class="number">1</span>), <span class="prelude-val">Err</span>(OUT_OF_RANGE));
         <span class="macro">assert_eq!</span>(p.set_year_mod_100(-<span class="number">1</span>), <span class="prelude-val">Err</span>(OUT_OF_RANGE));
         <span class="macro">assert_eq!</span>(p.set_year(-<span class="number">1</span>), <span class="prelude-val">Ok</span>(()));
         <span class="macro">assert_eq!</span>(p.set_year(-<span class="number">2</span>), <span class="prelude-val">Err</span>(IMPOSSIBLE));
         <span class="macro">assert_eq!</span>(p.set_year(<span class="number">0</span>), <span class="prelude-val">Err</span>(IMPOSSIBLE));

         <span class="kw">let </span><span class="kw-2">mut </span>p = Parsed::new();
         <span class="macro">assert_eq!</span>(p.set_year_div_100(<span class="number">0x1_0000_0008</span>), <span class="prelude-val">Err</span>(OUT_OF_RANGE));
         <span class="macro">assert_eq!</span>(p.set_year_div_100(<span class="number">8</span>), <span class="prelude-val">Ok</span>(()));
         <span class="macro">assert_eq!</span>(p.set_year_div_100(<span class="number">0x1_0000_0008</span>), <span class="prelude-val">Err</span>(OUT_OF_RANGE));

         <span class="comment">// month, week*, isoweek, ordinal, day, minute, second, nanosecond, offset
         </span><span class="kw">let </span><span class="kw-2">mut </span>p = Parsed::new();
         <span class="macro">assert_eq!</span>(p.set_month(<span class="number">7</span>), <span class="prelude-val">Ok</span>(()));
         <span class="macro">assert_eq!</span>(p.set_month(<span class="number">1</span>), <span class="prelude-val">Err</span>(IMPOSSIBLE));
         <span class="macro">assert_eq!</span>(p.set_month(<span class="number">6</span>), <span class="prelude-val">Err</span>(IMPOSSIBLE));
         <span class="macro">assert_eq!</span>(p.set_month(<span class="number">8</span>), <span class="prelude-val">Err</span>(IMPOSSIBLE));
         <span class="macro">assert_eq!</span>(p.set_month(<span class="number">12</span>), <span class="prelude-val">Err</span>(IMPOSSIBLE));

         <span class="kw">let </span><span class="kw-2">mut </span>p = Parsed::new();
         <span class="macro">assert_eq!</span>(p.set_month(<span class="number">8</span>), <span class="prelude-val">Ok</span>(()));
         <span class="macro">assert_eq!</span>(p.set_month(<span class="number">0x1_0000_0008</span>), <span class="prelude-val">Err</span>(OUT_OF_RANGE));

         <span class="comment">// hour
         </span><span class="kw">let </span><span class="kw-2">mut </span>p = Parsed::new();
         <span class="macro">assert_eq!</span>(p.set_hour(<span class="number">12</span>), <span class="prelude-val">Ok</span>(()));
         <span class="macro">assert_eq!</span>(p.set_hour(<span class="number">11</span>), <span class="prelude-val">Err</span>(IMPOSSIBLE));
         <span class="macro">assert_eq!</span>(p.set_hour(<span class="number">13</span>), <span class="prelude-val">Err</span>(IMPOSSIBLE));
         <span class="macro">assert_eq!</span>(p.set_hour(<span class="number">12</span>), <span class="prelude-val">Ok</span>(()));
         <span class="macro">assert_eq!</span>(p.set_ampm(<span class="bool-val">false</span>), <span class="prelude-val">Err</span>(IMPOSSIBLE));
         <span class="macro">assert_eq!</span>(p.set_ampm(<span class="bool-val">true</span>), <span class="prelude-val">Ok</span>(()));
         <span class="macro">assert_eq!</span>(p.set_hour12(<span class="number">12</span>), <span class="prelude-val">Ok</span>(()));
         <span class="macro">assert_eq!</span>(p.set_hour12(<span class="number">0</span>), <span class="prelude-val">Err</span>(OUT_OF_RANGE)); <span class="comment">// requires canonical representation
         </span><span class="macro">assert_eq!</span>(p.set_hour12(<span class="number">1</span>), <span class="prelude-val">Err</span>(IMPOSSIBLE));
         <span class="macro">assert_eq!</span>(p.set_hour12(<span class="number">11</span>), <span class="prelude-val">Err</span>(IMPOSSIBLE));

         <span class="kw">let </span><span class="kw-2">mut </span>p = Parsed::new();
         <span class="macro">assert_eq!</span>(p.set_ampm(<span class="bool-val">true</span>), <span class="prelude-val">Ok</span>(()));
         <span class="macro">assert_eq!</span>(p.set_hour12(<span class="number">7</span>), <span class="prelude-val">Ok</span>(()));
         <span class="macro">assert_eq!</span>(p.set_hour(<span class="number">7</span>), <span class="prelude-val">Err</span>(IMPOSSIBLE));
         <span class="macro">assert_eq!</span>(p.set_hour(<span class="number">18</span>), <span class="prelude-val">Err</span>(IMPOSSIBLE));
         <span class="macro">assert_eq!</span>(p.set_hour(<span class="number">19</span>), <span class="prelude-val">Ok</span>(()));

         <span class="comment">// timestamp
         </span><span class="kw">let </span><span class="kw-2">mut </span>p = Parsed::new();
         <span class="macro">assert_eq!</span>(p.set_timestamp(<span class="number">1_234_567_890</span>), <span class="prelude-val">Ok</span>(()));
         <span class="macro">assert_eq!</span>(p.set_timestamp(<span class="number">1_234_567_889</span>), <span class="prelude-val">Err</span>(IMPOSSIBLE));
         <span class="macro">assert_eq!</span>(p.set_timestamp(<span class="number">1_234_567_891</span>), <span class="prelude-val">Err</span>(IMPOSSIBLE));
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>test_parsed_to_naive_date() {
         <span class="macro">macro_rules! </span>parse {
             ($(<span class="macro-nonterminal">$k</span>:ident: <span class="macro-nonterminal">$v</span>:expr),<span class="kw-2">*</span>) =&gt; (
                 Parsed { $(<span class="macro-nonterminal">$k</span>: <span class="prelude-val">Some</span>(<span class="macro-nonterminal">$v</span>),)* ..Parsed::new() }.to_naive_date()
             )
         }

         <span class="kw">let </span>ymd = |y, m, d| <span class="prelude-val">Ok</span>(NaiveDate::from_ymd_opt(y, m, d).unwrap());

         <span class="comment">// ymd: omission of fields
         </span><span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(), <span class="prelude-val">Err</span>(NOT_ENOUGH));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: <span class="number">1984</span>), <span class="prelude-val">Err</span>(NOT_ENOUGH));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: <span class="number">1984</span>, month: <span class="number">1</span>), <span class="prelude-val">Err</span>(NOT_ENOUGH));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: <span class="number">1984</span>, month: <span class="number">1</span>, day: <span class="number">2</span>), ymd(<span class="number">1984</span>, <span class="number">1</span>, <span class="number">2</span>));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: <span class="number">1984</span>, day: <span class="number">2</span>), <span class="prelude-val">Err</span>(NOT_ENOUGH));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year_div_100: <span class="number">19</span>), <span class="prelude-val">Err</span>(NOT_ENOUGH));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year_div_100: <span class="number">19</span>, year_mod_100: <span class="number">84</span>), <span class="prelude-val">Err</span>(NOT_ENOUGH));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year_div_100: <span class="number">19</span>, year_mod_100: <span class="number">84</span>, month: <span class="number">1</span>), <span class="prelude-val">Err</span>(NOT_ENOUGH));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year_div_100: <span class="number">19</span>, year_mod_100: <span class="number">84</span>, month: <span class="number">1</span>, day: <span class="number">2</span>), ymd(<span class="number">1984</span>, <span class="number">1</span>, <span class="number">2</span>));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year_div_100: <span class="number">19</span>, year_mod_100: <span class="number">84</span>, day: <span class="number">2</span>), <span class="prelude-val">Err</span>(NOT_ENOUGH));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year_div_100: <span class="number">19</span>, month: <span class="number">1</span>, day: <span class="number">2</span>), <span class="prelude-val">Err</span>(NOT_ENOUGH));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year_mod_100: <span class="number">70</span>, month: <span class="number">1</span>, day: <span class="number">2</span>), ymd(<span class="number">1970</span>, <span class="number">1</span>, <span class="number">2</span>));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year_mod_100: <span class="number">69</span>, month: <span class="number">1</span>, day: <span class="number">2</span>), ymd(<span class="number">2069</span>, <span class="number">1</span>, <span class="number">2</span>));

         <span class="comment">// ymd: out-of-range conditions
         </span><span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year_div_100: <span class="number">19</span>, year_mod_100: <span class="number">84</span>, month: <span class="number">2</span>, day: <span class="number">29</span>), ymd(<span class="number">1984</span>, <span class="number">2</span>, <span class="number">29</span>));
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(year_div_100: <span class="number">19</span>, year_mod_100: <span class="number">83</span>, month: <span class="number">2</span>, day: <span class="number">29</span>),
             <span class="prelude-val">Err</span>(OUT_OF_RANGE)
         );
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(year_div_100: <span class="number">19</span>, year_mod_100: <span class="number">83</span>, month: <span class="number">13</span>, day: <span class="number">1</span>),
             <span class="prelude-val">Err</span>(OUT_OF_RANGE)
         );
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(year_div_100: <span class="number">19</span>, year_mod_100: <span class="number">83</span>, month: <span class="number">12</span>, day: <span class="number">31</span>),
             ymd(<span class="number">1983</span>, <span class="number">12</span>, <span class="number">31</span>)
         );
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(year_div_100: <span class="number">19</span>, year_mod_100: <span class="number">83</span>, month: <span class="number">12</span>, day: <span class="number">32</span>),
             <span class="prelude-val">Err</span>(OUT_OF_RANGE)
         );
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(year_div_100: <span class="number">19</span>, year_mod_100: <span class="number">83</span>, month: <span class="number">12</span>, day: <span class="number">0</span>),
             <span class="prelude-val">Err</span>(OUT_OF_RANGE)
         );
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(year_div_100: <span class="number">19</span>, year_mod_100: <span class="number">100</span>, month: <span class="number">1</span>, day: <span class="number">1</span>),
             <span class="prelude-val">Err</span>(OUT_OF_RANGE)
         );
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year_div_100: <span class="number">19</span>, year_mod_100: -<span class="number">1</span>, month: <span class="number">1</span>, day: <span class="number">1</span>), <span class="prelude-val">Err</span>(OUT_OF_RANGE));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year_div_100: <span class="number">0</span>, year_mod_100: <span class="number">0</span>, month: <span class="number">1</span>, day: <span class="number">1</span>), ymd(<span class="number">0</span>, <span class="number">1</span>, <span class="number">1</span>));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year_div_100: -<span class="number">1</span>, year_mod_100: <span class="number">42</span>, month: <span class="number">1</span>, day: <span class="number">1</span>), <span class="prelude-val">Err</span>(OUT_OF_RANGE));
         <span class="kw">let </span>max_year = NaiveDate::MAX.year();
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(year_div_100: max_year / <span class="number">100</span>,
                           year_mod_100: max_year % <span class="number">100</span>, month: <span class="number">1</span>, day: <span class="number">1</span>),
             ymd(max_year, <span class="number">1</span>, <span class="number">1</span>)
         );
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(year_div_100: (max_year + <span class="number">1</span>) / <span class="number">100</span>,
                           year_mod_100: (max_year + <span class="number">1</span>) % <span class="number">100</span>, month: <span class="number">1</span>, day: <span class="number">1</span>),
             <span class="prelude-val">Err</span>(OUT_OF_RANGE)
         );

         <span class="comment">// ymd: conflicting inputs
         </span><span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: <span class="number">1984</span>, year_div_100: <span class="number">19</span>, month: <span class="number">1</span>, day: <span class="number">1</span>), ymd(<span class="number">1984</span>, <span class="number">1</span>, <span class="number">1</span>));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: <span class="number">1984</span>, year_div_100: <span class="number">20</span>, month: <span class="number">1</span>, day: <span class="number">1</span>), <span class="prelude-val">Err</span>(IMPOSSIBLE));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: <span class="number">1984</span>, year_mod_100: <span class="number">84</span>, month: <span class="number">1</span>, day: <span class="number">1</span>), ymd(<span class="number">1984</span>, <span class="number">1</span>, <span class="number">1</span>));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: <span class="number">1984</span>, year_mod_100: <span class="number">83</span>, month: <span class="number">1</span>, day: <span class="number">1</span>), <span class="prelude-val">Err</span>(IMPOSSIBLE));
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(year: <span class="number">1984</span>, year_div_100: <span class="number">19</span>, year_mod_100: <span class="number">84</span>, month: <span class="number">1</span>, day: <span class="number">1</span>),
             ymd(<span class="number">1984</span>, <span class="number">1</span>, <span class="number">1</span>)
         );
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(year: <span class="number">1984</span>, year_div_100: <span class="number">18</span>, year_mod_100: <span class="number">94</span>, month: <span class="number">1</span>, day: <span class="number">1</span>),
             <span class="prelude-val">Err</span>(IMPOSSIBLE)
         );
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(year: <span class="number">1984</span>, year_div_100: <span class="number">18</span>, year_mod_100: <span class="number">184</span>, month: <span class="number">1</span>, day: <span class="number">1</span>),
             <span class="prelude-val">Err</span>(OUT_OF_RANGE)
         );
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(year: -<span class="number">1</span>, year_div_100: <span class="number">0</span>, year_mod_100: -<span class="number">1</span>, month: <span class="number">1</span>, day: <span class="number">1</span>),
             <span class="prelude-val">Err</span>(OUT_OF_RANGE)
         );
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(year: -<span class="number">1</span>, year_div_100: -<span class="number">1</span>, year_mod_100: <span class="number">99</span>, month: <span class="number">1</span>, day: <span class="number">1</span>),
             <span class="prelude-val">Err</span>(OUT_OF_RANGE)
         );
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: -<span class="number">1</span>, year_div_100: <span class="number">0</span>, month: <span class="number">1</span>, day: <span class="number">1</span>), <span class="prelude-val">Err</span>(OUT_OF_RANGE));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: -<span class="number">1</span>, year_mod_100: <span class="number">99</span>, month: <span class="number">1</span>, day: <span class="number">1</span>), <span class="prelude-val">Err</span>(OUT_OF_RANGE));

         <span class="comment">// weekdates
         </span><span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: <span class="number">2000</span>, week_from_mon: <span class="number">0</span>), <span class="prelude-val">Err</span>(NOT_ENOUGH));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: <span class="number">2000</span>, week_from_sun: <span class="number">0</span>), <span class="prelude-val">Err</span>(NOT_ENOUGH));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: <span class="number">2000</span>, weekday: Sun), <span class="prelude-val">Err</span>(NOT_ENOUGH));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: <span class="number">2000</span>, week_from_mon: <span class="number">0</span>, weekday: Fri), <span class="prelude-val">Err</span>(OUT_OF_RANGE));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: <span class="number">2000</span>, week_from_sun: <span class="number">0</span>, weekday: Fri), <span class="prelude-val">Err</span>(OUT_OF_RANGE));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: <span class="number">2000</span>, week_from_mon: <span class="number">0</span>, weekday: Sat), ymd(<span class="number">2000</span>, <span class="number">1</span>, <span class="number">1</span>));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: <span class="number">2000</span>, week_from_sun: <span class="number">0</span>, weekday: Sat), ymd(<span class="number">2000</span>, <span class="number">1</span>, <span class="number">1</span>));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: <span class="number">2000</span>, week_from_mon: <span class="number">0</span>, weekday: Sun), ymd(<span class="number">2000</span>, <span class="number">1</span>, <span class="number">2</span>));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: <span class="number">2000</span>, week_from_sun: <span class="number">1</span>, weekday: Sun), ymd(<span class="number">2000</span>, <span class="number">1</span>, <span class="number">2</span>));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: <span class="number">2000</span>, week_from_mon: <span class="number">1</span>, weekday: Mon), ymd(<span class="number">2000</span>, <span class="number">1</span>, <span class="number">3</span>));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: <span class="number">2000</span>, week_from_sun: <span class="number">1</span>, weekday: Mon), ymd(<span class="number">2000</span>, <span class="number">1</span>, <span class="number">3</span>));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: <span class="number">2000</span>, week_from_mon: <span class="number">1</span>, weekday: Sat), ymd(<span class="number">2000</span>, <span class="number">1</span>, <span class="number">8</span>));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: <span class="number">2000</span>, week_from_sun: <span class="number">1</span>, weekday: Sat), ymd(<span class="number">2000</span>, <span class="number">1</span>, <span class="number">8</span>));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: <span class="number">2000</span>, week_from_mon: <span class="number">1</span>, weekday: Sun), ymd(<span class="number">2000</span>, <span class="number">1</span>, <span class="number">9</span>));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: <span class="number">2000</span>, week_from_sun: <span class="number">2</span>, weekday: Sun), ymd(<span class="number">2000</span>, <span class="number">1</span>, <span class="number">9</span>));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: <span class="number">2000</span>, week_from_mon: <span class="number">2</span>, weekday: Mon), ymd(<span class="number">2000</span>, <span class="number">1</span>, <span class="number">10</span>));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: <span class="number">2000</span>, week_from_sun: <span class="number">52</span>, weekday: Sat), ymd(<span class="number">2000</span>, <span class="number">12</span>, <span class="number">30</span>));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: <span class="number">2000</span>, week_from_sun: <span class="number">53</span>, weekday: Sun), ymd(<span class="number">2000</span>, <span class="number">12</span>, <span class="number">31</span>));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: <span class="number">2000</span>, week_from_sun: <span class="number">53</span>, weekday: Mon), <span class="prelude-val">Err</span>(OUT_OF_RANGE));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: <span class="number">2000</span>, week_from_sun: <span class="number">0xffffffff</span>, weekday: Mon), <span class="prelude-val">Err</span>(OUT_OF_RANGE));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: <span class="number">2006</span>, week_from_sun: <span class="number">0</span>, weekday: Sat), <span class="prelude-val">Err</span>(OUT_OF_RANGE));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: <span class="number">2006</span>, week_from_sun: <span class="number">1</span>, weekday: Sun), ymd(<span class="number">2006</span>, <span class="number">1</span>, <span class="number">1</span>));

         <span class="comment">// weekdates: conflicting inputs
         </span><span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(year: <span class="number">2000</span>, week_from_mon: <span class="number">1</span>, week_from_sun: <span class="number">1</span>, weekday: Sat),
             ymd(<span class="number">2000</span>, <span class="number">1</span>, <span class="number">8</span>)
         );
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(year: <span class="number">2000</span>, week_from_mon: <span class="number">1</span>, week_from_sun: <span class="number">2</span>, weekday: Sun),
             ymd(<span class="number">2000</span>, <span class="number">1</span>, <span class="number">9</span>)
         );
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(year: <span class="number">2000</span>, week_from_mon: <span class="number">1</span>, week_from_sun: <span class="number">1</span>, weekday: Sun),
             <span class="prelude-val">Err</span>(IMPOSSIBLE)
         );
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(year: <span class="number">2000</span>, week_from_mon: <span class="number">2</span>, week_from_sun: <span class="number">2</span>, weekday: Sun),
             <span class="prelude-val">Err</span>(IMPOSSIBLE)
         );

         <span class="comment">// ISO weekdates
         </span><span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(isoyear: <span class="number">2004</span>, isoweek: <span class="number">53</span>), <span class="prelude-val">Err</span>(NOT_ENOUGH));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(isoyear: <span class="number">2004</span>, isoweek: <span class="number">53</span>, weekday: Fri), ymd(<span class="number">2004</span>, <span class="number">12</span>, <span class="number">31</span>));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(isoyear: <span class="number">2004</span>, isoweek: <span class="number">53</span>, weekday: Sat), ymd(<span class="number">2005</span>, <span class="number">1</span>, <span class="number">1</span>));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(isoyear: <span class="number">2004</span>, isoweek: <span class="number">0xffffffff</span>, weekday: Sat), <span class="prelude-val">Err</span>(OUT_OF_RANGE));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(isoyear: <span class="number">2005</span>, isoweek: <span class="number">0</span>, weekday: Thu), <span class="prelude-val">Err</span>(OUT_OF_RANGE));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(isoyear: <span class="number">2005</span>, isoweek: <span class="number">5</span>, weekday: Thu), ymd(<span class="number">2005</span>, <span class="number">2</span>, <span class="number">3</span>));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(isoyear: <span class="number">2005</span>, weekday: Thu), <span class="prelude-val">Err</span>(NOT_ENOUGH));

         <span class="comment">// year and ordinal
         </span><span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(ordinal: <span class="number">123</span>), <span class="prelude-val">Err</span>(NOT_ENOUGH));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: <span class="number">2000</span>, ordinal: <span class="number">0</span>), <span class="prelude-val">Err</span>(OUT_OF_RANGE));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: <span class="number">2000</span>, ordinal: <span class="number">1</span>), ymd(<span class="number">2000</span>, <span class="number">1</span>, <span class="number">1</span>));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: <span class="number">2000</span>, ordinal: <span class="number">60</span>), ymd(<span class="number">2000</span>, <span class="number">2</span>, <span class="number">29</span>));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: <span class="number">2000</span>, ordinal: <span class="number">61</span>), ymd(<span class="number">2000</span>, <span class="number">3</span>, <span class="number">1</span>));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: <span class="number">2000</span>, ordinal: <span class="number">366</span>), ymd(<span class="number">2000</span>, <span class="number">12</span>, <span class="number">31</span>));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: <span class="number">2000</span>, ordinal: <span class="number">367</span>), <span class="prelude-val">Err</span>(OUT_OF_RANGE));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: <span class="number">2000</span>, ordinal: <span class="number">0xffffffff</span>), <span class="prelude-val">Err</span>(OUT_OF_RANGE));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: <span class="number">2100</span>, ordinal: <span class="number">0</span>), <span class="prelude-val">Err</span>(OUT_OF_RANGE));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: <span class="number">2100</span>, ordinal: <span class="number">1</span>), ymd(<span class="number">2100</span>, <span class="number">1</span>, <span class="number">1</span>));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: <span class="number">2100</span>, ordinal: <span class="number">59</span>), ymd(<span class="number">2100</span>, <span class="number">2</span>, <span class="number">28</span>));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: <span class="number">2100</span>, ordinal: <span class="number">60</span>), ymd(<span class="number">2100</span>, <span class="number">3</span>, <span class="number">1</span>));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: <span class="number">2100</span>, ordinal: <span class="number">365</span>), ymd(<span class="number">2100</span>, <span class="number">12</span>, <span class="number">31</span>));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: <span class="number">2100</span>, ordinal: <span class="number">366</span>), <span class="prelude-val">Err</span>(OUT_OF_RANGE));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year: <span class="number">2100</span>, ordinal: <span class="number">0xffffffff</span>), <span class="prelude-val">Err</span>(OUT_OF_RANGE));

         <span class="comment">// more complex cases
         </span><span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(year: <span class="number">2014</span>, month: <span class="number">12</span>, day: <span class="number">31</span>, ordinal: <span class="number">365</span>, isoyear: <span class="number">2015</span>, isoweek: <span class="number">1</span>,
                           week_from_sun: <span class="number">52</span>, week_from_mon: <span class="number">52</span>, weekday: Wed),
             ymd(<span class="number">2014</span>, <span class="number">12</span>, <span class="number">31</span>)
         );
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(year: <span class="number">2014</span>, month: <span class="number">12</span>, ordinal: <span class="number">365</span>, isoyear: <span class="number">2015</span>, isoweek: <span class="number">1</span>,
                           week_from_sun: <span class="number">52</span>, week_from_mon: <span class="number">52</span>),
             ymd(<span class="number">2014</span>, <span class="number">12</span>, <span class="number">31</span>)
         );
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(year: <span class="number">2014</span>, month: <span class="number">12</span>, day: <span class="number">31</span>, ordinal: <span class="number">365</span>, isoyear: <span class="number">2014</span>, isoweek: <span class="number">53</span>,
                           week_from_sun: <span class="number">52</span>, week_from_mon: <span class="number">52</span>, weekday: Wed),
             <span class="prelude-val">Err</span>(IMPOSSIBLE)
         ); <span class="comment">// no ISO week date 2014-W53-3
         </span><span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(year: <span class="number">2012</span>, isoyear: <span class="number">2015</span>, isoweek: <span class="number">1</span>,
                           week_from_sun: <span class="number">52</span>, week_from_mon: <span class="number">52</span>),
             <span class="prelude-val">Err</span>(NOT_ENOUGH)
         ); <span class="comment">// ambiguous (2014-12-29, 2014-12-30, 2014-12-31)
         </span><span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(year_div_100: <span class="number">20</span>, isoyear_mod_100: <span class="number">15</span>, ordinal: <span class="number">366</span>), <span class="prelude-val">Err</span>(NOT_ENOUGH));
         <span class="comment">// technically unique (2014-12-31) but Chrono gives up
     </span>}

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>test_parsed_to_naive_time() {
         <span class="macro">macro_rules! </span>parse {
             ($(<span class="macro-nonterminal">$k</span>:ident: <span class="macro-nonterminal">$v</span>:expr),<span class="kw-2">*</span>) =&gt; (
                 Parsed { $(<span class="macro-nonterminal">$k</span>: <span class="prelude-val">Some</span>(<span class="macro-nonterminal">$v</span>),)* ..Parsed::new() }.to_naive_time()
             )
         }

         <span class="kw">let </span>hms = |h, m, s| <span class="prelude-val">Ok</span>(NaiveTime::from_hms_opt(h, m, s).unwrap());
         <span class="kw">let </span>hmsn = |h, m, s, n| <span class="prelude-val">Ok</span>(NaiveTime::from_hms_nano_opt(h, m, s, n).unwrap());

         <span class="comment">// omission of fields
         </span><span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(), <span class="prelude-val">Err</span>(NOT_ENOUGH));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(hour_div_12: <span class="number">0</span>), <span class="prelude-val">Err</span>(NOT_ENOUGH));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(hour_div_12: <span class="number">0</span>, hour_mod_12: <span class="number">1</span>), <span class="prelude-val">Err</span>(NOT_ENOUGH));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(hour_div_12: <span class="number">0</span>, hour_mod_12: <span class="number">1</span>, minute: <span class="number">23</span>), hms(<span class="number">1</span>, <span class="number">23</span>, <span class="number">0</span>));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(hour_div_12: <span class="number">0</span>, hour_mod_12: <span class="number">1</span>, minute: <span class="number">23</span>, second: <span class="number">45</span>), hms(<span class="number">1</span>, <span class="number">23</span>, <span class="number">45</span>));
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(hour_div_12: <span class="number">0</span>, hour_mod_12: <span class="number">1</span>, minute: <span class="number">23</span>, second: <span class="number">45</span>,
                           nanosecond: <span class="number">678_901_234</span>),
             hmsn(<span class="number">1</span>, <span class="number">23</span>, <span class="number">45</span>, <span class="number">678_901_234</span>)
         );
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(hour_div_12: <span class="number">1</span>, hour_mod_12: <span class="number">11</span>, minute: <span class="number">45</span>, second: <span class="number">6</span>), hms(<span class="number">23</span>, <span class="number">45</span>, <span class="number">6</span>));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(hour_mod_12: <span class="number">1</span>, minute: <span class="number">23</span>), <span class="prelude-val">Err</span>(NOT_ENOUGH));
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(hour_div_12: <span class="number">0</span>, hour_mod_12: <span class="number">1</span>, minute: <span class="number">23</span>, nanosecond: <span class="number">456_789_012</span>),
             <span class="prelude-val">Err</span>(NOT_ENOUGH)
         );

         <span class="comment">// out-of-range conditions
         </span><span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(hour_div_12: <span class="number">2</span>, hour_mod_12: <span class="number">0</span>, minute: <span class="number">0</span>), <span class="prelude-val">Err</span>(OUT_OF_RANGE));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(hour_div_12: <span class="number">1</span>, hour_mod_12: <span class="number">12</span>, minute: <span class="number">0</span>), <span class="prelude-val">Err</span>(OUT_OF_RANGE));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(hour_div_12: <span class="number">0</span>, hour_mod_12: <span class="number">1</span>, minute: <span class="number">60</span>), <span class="prelude-val">Err</span>(OUT_OF_RANGE));
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(hour_div_12: <span class="number">0</span>, hour_mod_12: <span class="number">1</span>, minute: <span class="number">23</span>, second: <span class="number">61</span>),
             <span class="prelude-val">Err</span>(OUT_OF_RANGE)
         );
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(hour_div_12: <span class="number">0</span>, hour_mod_12: <span class="number">1</span>, minute: <span class="number">23</span>, second: <span class="number">34</span>,
                           nanosecond: <span class="number">1_000_000_000</span>),
             <span class="prelude-val">Err</span>(OUT_OF_RANGE)
         );

         <span class="comment">// leap seconds
         </span><span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(hour_div_12: <span class="number">0</span>, hour_mod_12: <span class="number">1</span>, minute: <span class="number">23</span>, second: <span class="number">60</span>),
             hmsn(<span class="number">1</span>, <span class="number">23</span>, <span class="number">59</span>, <span class="number">1_000_000_000</span>)
         );
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(hour_div_12: <span class="number">0</span>, hour_mod_12: <span class="number">1</span>, minute: <span class="number">23</span>, second: <span class="number">60</span>,
                           nanosecond: <span class="number">999_999_999</span>),
             hmsn(<span class="number">1</span>, <span class="number">23</span>, <span class="number">59</span>, <span class="number">1_999_999_999</span>)
         );
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>test_parsed_to_naive_datetime_with_offset() {
         <span class="macro">macro_rules! </span>parse {
             (offset = <span class="macro-nonterminal">$offset</span>:expr; $(<span class="macro-nonterminal">$k</span>:ident: <span class="macro-nonterminal">$v</span>:expr),<span class="kw-2">*</span>) =&gt; (
                 Parsed { $(<span class="macro-nonterminal">$k</span>: <span class="prelude-val">Some</span>(<span class="macro-nonterminal">$v</span>),)* ..Parsed::new() }.to_naive_datetime_with_offset(<span class="macro-nonterminal">$offset</span>)
             );
             ($(<span class="macro-nonterminal">$k</span>:ident: <span class="macro-nonterminal">$v</span>:expr),<span class="kw-2">*</span>) =&gt; (<span class="macro">parse!</span>(offset = <span class="number">0</span>; $(<span class="macro-nonterminal">$k</span>: <span class="macro-nonterminal">$v</span>),<span class="kw-2">*</span>))
         }

         <span class="kw">let </span>ymdhms = |y, m, d, h, n, s| {
             <span class="prelude-val">Ok</span>(NaiveDate::from_ymd_opt(y, m, d).unwrap().and_hms_opt(h, n, s).unwrap())
         };
         <span class="kw">let </span>ymdhmsn = |y, m, d, h, n, s, nano| {
             <span class="prelude-val">Ok</span>(NaiveDate::from_ymd_opt(y, m, d).unwrap().and_hms_nano_opt(h, n, s, nano).unwrap())
         };

         <span class="comment">// omission of fields
         </span><span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(), <span class="prelude-val">Err</span>(NOT_ENOUGH));
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(year: <span class="number">2015</span>, month: <span class="number">1</span>, day: <span class="number">30</span>,
                           hour_div_12: <span class="number">1</span>, hour_mod_12: <span class="number">2</span>, minute: <span class="number">38</span>),
             ymdhms(<span class="number">2015</span>, <span class="number">1</span>, <span class="number">30</span>, <span class="number">14</span>, <span class="number">38</span>, <span class="number">0</span>)
         );
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(year: <span class="number">1997</span>, month: <span class="number">1</span>, day: <span class="number">30</span>,
                           hour_div_12: <span class="number">1</span>, hour_mod_12: <span class="number">2</span>, minute: <span class="number">38</span>, second: <span class="number">5</span>),
             ymdhms(<span class="number">1997</span>, <span class="number">1</span>, <span class="number">30</span>, <span class="number">14</span>, <span class="number">38</span>, <span class="number">5</span>)
         );
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(year: <span class="number">2012</span>, ordinal: <span class="number">34</span>, hour_div_12: <span class="number">0</span>, hour_mod_12: <span class="number">5</span>,
                           minute: <span class="number">6</span>, second: <span class="number">7</span>, nanosecond: <span class="number">890_123_456</span>),
             ymdhmsn(<span class="number">2012</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">5</span>, <span class="number">6</span>, <span class="number">7</span>, <span class="number">890_123_456</span>)
         );
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(timestamp: <span class="number">0</span>), ymdhms(<span class="number">1970</span>, <span class="number">1</span>, <span class="number">1</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(timestamp: <span class="number">1</span>, nanosecond: <span class="number">0</span>), ymdhms(<span class="number">1970</span>, <span class="number">1</span>, <span class="number">1</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">1</span>));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(timestamp: <span class="number">1</span>, nanosecond: <span class="number">1</span>), ymdhmsn(<span class="number">1970</span>, <span class="number">1</span>, <span class="number">1</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">1</span>, <span class="number">1</span>));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(timestamp: <span class="number">1_420_000_000</span>), ymdhms(<span class="number">2014</span>, <span class="number">12</span>, <span class="number">31</span>, <span class="number">4</span>, <span class="number">26</span>, <span class="number">40</span>));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(timestamp: -<span class="number">0x1_0000_0000</span>), ymdhms(<span class="number">1833</span>, <span class="number">11</span>, <span class="number">24</span>, <span class="number">17</span>, <span class="number">31</span>, <span class="number">44</span>));

         <span class="comment">// full fields
         </span><span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(year: <span class="number">2014</span>, year_div_100: <span class="number">20</span>, year_mod_100: <span class="number">14</span>, month: <span class="number">12</span>, day: <span class="number">31</span>,
                           ordinal: <span class="number">365</span>, isoyear: <span class="number">2015</span>, isoyear_div_100: <span class="number">20</span>, isoyear_mod_100: <span class="number">15</span>,
                           isoweek: <span class="number">1</span>, week_from_sun: <span class="number">52</span>, week_from_mon: <span class="number">52</span>, weekday: Wed,
                           hour_div_12: <span class="number">0</span>, hour_mod_12: <span class="number">4</span>, minute: <span class="number">26</span>, second: <span class="number">40</span>,
                           nanosecond: <span class="number">12_345_678</span>, timestamp: <span class="number">1_420_000_000</span>),
             ymdhmsn(<span class="number">2014</span>, <span class="number">12</span>, <span class="number">31</span>, <span class="number">4</span>, <span class="number">26</span>, <span class="number">40</span>, <span class="number">12_345_678</span>)
         );
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(year: <span class="number">2014</span>, year_div_100: <span class="number">20</span>, year_mod_100: <span class="number">14</span>, month: <span class="number">12</span>, day: <span class="number">31</span>,
                           ordinal: <span class="number">365</span>, isoyear: <span class="number">2015</span>, isoyear_div_100: <span class="number">20</span>, isoyear_mod_100: <span class="number">15</span>,
                           isoweek: <span class="number">1</span>, week_from_sun: <span class="number">52</span>, week_from_mon: <span class="number">52</span>, weekday: Wed,
                           hour_div_12: <span class="number">0</span>, hour_mod_12: <span class="number">4</span>, minute: <span class="number">26</span>, second: <span class="number">40</span>,
                           nanosecond: <span class="number">12_345_678</span>, timestamp: <span class="number">1_419_999_999</span>),
             <span class="prelude-val">Err</span>(IMPOSSIBLE)
         );
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(offset = <span class="number">32400</span>;
                           year: <span class="number">2014</span>, year_div_100: <span class="number">20</span>, year_mod_100: <span class="number">14</span>, month: <span class="number">12</span>, day: <span class="number">31</span>,
                           ordinal: <span class="number">365</span>, isoyear: <span class="number">2015</span>, isoyear_div_100: <span class="number">20</span>, isoyear_mod_100: <span class="number">15</span>,
                           isoweek: <span class="number">1</span>, week_from_sun: <span class="number">52</span>, week_from_mon: <span class="number">52</span>, weekday: Wed,
                           hour_div_12: <span class="number">0</span>, hour_mod_12: <span class="number">4</span>, minute: <span class="number">26</span>, second: <span class="number">40</span>,
                           nanosecond: <span class="number">12_345_678</span>, timestamp: <span class="number">1_419_967_600</span>),
             ymdhmsn(<span class="number">2014</span>, <span class="number">12</span>, <span class="number">31</span>, <span class="number">4</span>, <span class="number">26</span>, <span class="number">40</span>, <span class="number">12_345_678</span>)
         );

         <span class="comment">// more timestamps
         </span><span class="kw">let </span>max_days_from_year_1970 =
             NaiveDate::MAX.signed_duration_since(NaiveDate::from_ymd_opt(<span class="number">1970</span>, <span class="number">1</span>, <span class="number">1</span>).unwrap());
         <span class="kw">let </span>year_0_from_year_1970 = NaiveDate::from_ymd_opt(<span class="number">0</span>, <span class="number">1</span>, <span class="number">1</span>)
             .unwrap()
             .signed_duration_since(NaiveDate::from_ymd_opt(<span class="number">1970</span>, <span class="number">1</span>, <span class="number">1</span>).unwrap());
         <span class="kw">let </span>min_days_from_year_1970 =
             NaiveDate::MIN.signed_duration_since(NaiveDate::from_ymd_opt(<span class="number">1970</span>, <span class="number">1</span>, <span class="number">1</span>).unwrap());
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(timestamp: min_days_from_year_1970.num_seconds()),
             ymdhms(NaiveDate::MIN.year(), <span class="number">1</span>, <span class="number">1</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>)
         );
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(timestamp: year_0_from_year_1970.num_seconds()),
             ymdhms(<span class="number">0</span>, <span class="number">1</span>, <span class="number">1</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>)
         );
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(timestamp: max_days_from_year_1970.num_seconds() + <span class="number">86399</span>),
             ymdhms(NaiveDate::MAX.year(), <span class="number">12</span>, <span class="number">31</span>, <span class="number">23</span>, <span class="number">59</span>, <span class="number">59</span>)
         );

         <span class="comment">// leap seconds #1: partial fields
         </span><span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(second: <span class="number">59</span>, timestamp: <span class="number">1_341_100_798</span>), <span class="prelude-val">Err</span>(IMPOSSIBLE));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(second: <span class="number">59</span>, timestamp: <span class="number">1_341_100_799</span>), ymdhms(<span class="number">2012</span>, <span class="number">6</span>, <span class="number">30</span>, <span class="number">23</span>, <span class="number">59</span>, <span class="number">59</span>));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(second: <span class="number">59</span>, timestamp: <span class="number">1_341_100_800</span>), <span class="prelude-val">Err</span>(IMPOSSIBLE));
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(second: <span class="number">60</span>, timestamp: <span class="number">1_341_100_799</span>),
             ymdhmsn(<span class="number">2012</span>, <span class="number">6</span>, <span class="number">30</span>, <span class="number">23</span>, <span class="number">59</span>, <span class="number">59</span>, <span class="number">1_000_000_000</span>)
         );
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(second: <span class="number">60</span>, timestamp: <span class="number">1_341_100_800</span>),
             ymdhmsn(<span class="number">2012</span>, <span class="number">6</span>, <span class="number">30</span>, <span class="number">23</span>, <span class="number">59</span>, <span class="number">59</span>, <span class="number">1_000_000_000</span>)
         );
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(second: <span class="number">0</span>, timestamp: <span class="number">1_341_100_800</span>), ymdhms(<span class="number">2012</span>, <span class="number">7</span>, <span class="number">1</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(second: <span class="number">1</span>, timestamp: <span class="number">1_341_100_800</span>), <span class="prelude-val">Err</span>(IMPOSSIBLE));
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(second: <span class="number">60</span>, timestamp: <span class="number">1_341_100_801</span>), <span class="prelude-val">Err</span>(IMPOSSIBLE));

         <span class="comment">// leap seconds #2: full fields
         // we need to have separate tests for them since it uses another control flow.
         </span><span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(year: <span class="number">2012</span>, ordinal: <span class="number">182</span>, hour_div_12: <span class="number">1</span>, hour_mod_12: <span class="number">11</span>,
                           minute: <span class="number">59</span>, second: <span class="number">59</span>, timestamp: <span class="number">1_341_100_798</span>),
             <span class="prelude-val">Err</span>(IMPOSSIBLE)
         );
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(year: <span class="number">2012</span>, ordinal: <span class="number">182</span>, hour_div_12: <span class="number">1</span>, hour_mod_12: <span class="number">11</span>,
                           minute: <span class="number">59</span>, second: <span class="number">59</span>, timestamp: <span class="number">1_341_100_799</span>),
             ymdhms(<span class="number">2012</span>, <span class="number">6</span>, <span class="number">30</span>, <span class="number">23</span>, <span class="number">59</span>, <span class="number">59</span>)
         );
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(year: <span class="number">2012</span>, ordinal: <span class="number">182</span>, hour_div_12: <span class="number">1</span>, hour_mod_12: <span class="number">11</span>,
                           minute: <span class="number">59</span>, second: <span class="number">59</span>, timestamp: <span class="number">1_341_100_800</span>),
             <span class="prelude-val">Err</span>(IMPOSSIBLE)
         );
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(year: <span class="number">2012</span>, ordinal: <span class="number">182</span>, hour_div_12: <span class="number">1</span>, hour_mod_12: <span class="number">11</span>,
                           minute: <span class="number">59</span>, second: <span class="number">60</span>, timestamp: <span class="number">1_341_100_799</span>),
             ymdhmsn(<span class="number">2012</span>, <span class="number">6</span>, <span class="number">30</span>, <span class="number">23</span>, <span class="number">59</span>, <span class="number">59</span>, <span class="number">1_000_000_000</span>)
         );
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(year: <span class="number">2012</span>, ordinal: <span class="number">182</span>, hour_div_12: <span class="number">1</span>, hour_mod_12: <span class="number">11</span>,
                           minute: <span class="number">59</span>, second: <span class="number">60</span>, timestamp: <span class="number">1_341_100_800</span>),
             ymdhmsn(<span class="number">2012</span>, <span class="number">6</span>, <span class="number">30</span>, <span class="number">23</span>, <span class="number">59</span>, <span class="number">59</span>, <span class="number">1_000_000_000</span>)
         );
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(year: <span class="number">2012</span>, ordinal: <span class="number">183</span>, hour_div_12: <span class="number">0</span>, hour_mod_12: <span class="number">0</span>,
                           minute: <span class="number">0</span>, second: <span class="number">0</span>, timestamp: <span class="number">1_341_100_800</span>),
             ymdhms(<span class="number">2012</span>, <span class="number">7</span>, <span class="number">1</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>)
         );
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(year: <span class="number">2012</span>, ordinal: <span class="number">183</span>, hour_div_12: <span class="number">0</span>, hour_mod_12: <span class="number">0</span>,
                           minute: <span class="number">0</span>, second: <span class="number">1</span>, timestamp: <span class="number">1_341_100_800</span>),
             <span class="prelude-val">Err</span>(IMPOSSIBLE)
         );
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(year: <span class="number">2012</span>, ordinal: <span class="number">182</span>, hour_div_12: <span class="number">1</span>, hour_mod_12: <span class="number">11</span>,
                           minute: <span class="number">59</span>, second: <span class="number">60</span>, timestamp: <span class="number">1_341_100_801</span>),
             <span class="prelude-val">Err</span>(IMPOSSIBLE)
         );

         <span class="comment">// error codes
         </span><span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(year: <span class="number">2015</span>, month: <span class="number">1</span>, day: <span class="number">20</span>, weekday: Tue,
                           hour_div_12: <span class="number">2</span>, hour_mod_12: <span class="number">1</span>, minute: <span class="number">35</span>, second: <span class="number">20</span>),
             <span class="prelude-val">Err</span>(OUT_OF_RANGE)
         ); <span class="comment">// `hour_div_12` is out of range
     </span>}

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>test_parsed_to_datetime() {
         <span class="macro">macro_rules! </span>parse {
             ($(<span class="macro-nonterminal">$k</span>:ident: <span class="macro-nonterminal">$v</span>:expr),<span class="kw-2">*</span>) =&gt; (
                 Parsed { $(<span class="macro-nonterminal">$k</span>: <span class="prelude-val">Some</span>(<span class="macro-nonterminal">$v</span>),)* ..Parsed::new() }.to_datetime()
             )
         }

         <span class="kw">let </span>ymdhmsn = |y, m, d, h, n, s, nano, off| {
             <span class="prelude-val">Ok</span>(FixedOffset::east_opt(off)
                 .unwrap()
                 .from_local_datetime(
                     <span class="kw-2">&amp;</span>NaiveDate::from_ymd_opt(y, m, d)
                         .unwrap()
                         .and_hms_nano_opt(h, n, s, nano)
                         .unwrap(),
                 )
                 .unwrap())
         };

         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(offset: <span class="number">0</span>), <span class="prelude-val">Err</span>(NOT_ENOUGH));
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(year: <span class="number">2014</span>, ordinal: <span class="number">365</span>, hour_div_12: <span class="number">0</span>, hour_mod_12: <span class="number">4</span>,
                           minute: <span class="number">26</span>, second: <span class="number">40</span>, nanosecond: <span class="number">12_345_678</span>),
             <span class="prelude-val">Err</span>(NOT_ENOUGH)
         );
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(year: <span class="number">2014</span>, ordinal: <span class="number">365</span>, hour_div_12: <span class="number">0</span>, hour_mod_12: <span class="number">4</span>,
                           minute: <span class="number">26</span>, second: <span class="number">40</span>, nanosecond: <span class="number">12_345_678</span>, offset: <span class="number">0</span>),
             ymdhmsn(<span class="number">2014</span>, <span class="number">12</span>, <span class="number">31</span>, <span class="number">4</span>, <span class="number">26</span>, <span class="number">40</span>, <span class="number">12_345_678</span>, <span class="number">0</span>)
         );
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(year: <span class="number">2014</span>, ordinal: <span class="number">365</span>, hour_div_12: <span class="number">1</span>, hour_mod_12: <span class="number">1</span>,
                           minute: <span class="number">26</span>, second: <span class="number">40</span>, nanosecond: <span class="number">12_345_678</span>, offset: <span class="number">32400</span>),
             ymdhmsn(<span class="number">2014</span>, <span class="number">12</span>, <span class="number">31</span>, <span class="number">13</span>, <span class="number">26</span>, <span class="number">40</span>, <span class="number">12_345_678</span>, <span class="number">32400</span>)
         );
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(year: <span class="number">2014</span>, ordinal: <span class="number">365</span>, hour_div_12: <span class="number">0</span>, hour_mod_12: <span class="number">1</span>,
                           minute: <span class="number">42</span>, second: <span class="number">4</span>, nanosecond: <span class="number">12_345_678</span>, offset: -<span class="number">9876</span>),
             ymdhmsn(<span class="number">2014</span>, <span class="number">12</span>, <span class="number">31</span>, <span class="number">1</span>, <span class="number">42</span>, <span class="number">4</span>, <span class="number">12_345_678</span>, -<span class="number">9876</span>)
         );
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(year: <span class="number">2015</span>, ordinal: <span class="number">1</span>, hour_div_12: <span class="number">0</span>, hour_mod_12: <span class="number">4</span>,
                           minute: <span class="number">26</span>, second: <span class="number">40</span>, nanosecond: <span class="number">12_345_678</span>, offset: <span class="number">86_400</span>),
             <span class="prelude-val">Err</span>(OUT_OF_RANGE)
         ); <span class="comment">// `FixedOffset` does not support such huge offset
     </span>}

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>test_parsed_to_datetime_with_timezone() {
         <span class="macro">macro_rules! </span>parse {
             (<span class="macro-nonterminal">$tz</span>:expr; $(<span class="macro-nonterminal">$k</span>:ident: <span class="macro-nonterminal">$v</span>:expr),<span class="kw-2">*</span>) =&gt; (
                 Parsed { $(<span class="macro-nonterminal">$k</span>: <span class="prelude-val">Some</span>(<span class="macro-nonterminal">$v</span>),)* ..Parsed::new() }.to_datetime_with_timezone(<span class="kw-2">&amp;</span><span class="macro-nonterminal">$tz</span>)
             )
         }

         <span class="comment">// single result from ymdhms
         </span><span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(Utc;
                           year: <span class="number">2014</span>, ordinal: <span class="number">365</span>, hour_div_12: <span class="number">0</span>, hour_mod_12: <span class="number">4</span>,
                           minute: <span class="number">26</span>, second: <span class="number">40</span>, nanosecond: <span class="number">12_345_678</span>, offset: <span class="number">0</span>),
             <span class="prelude-val">Ok</span>(Utc
                 .from_local_datetime(
                     <span class="kw-2">&amp;</span>NaiveDate::from_ymd_opt(<span class="number">2014</span>, <span class="number">12</span>, <span class="number">31</span>)
                         .unwrap()
                         .and_hms_nano_opt(<span class="number">4</span>, <span class="number">26</span>, <span class="number">40</span>, <span class="number">12_345_678</span>)
                         .unwrap()
                 )
                 .unwrap())
         );
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(Utc;
                           year: <span class="number">2014</span>, ordinal: <span class="number">365</span>, hour_div_12: <span class="number">1</span>, hour_mod_12: <span class="number">1</span>,
                           minute: <span class="number">26</span>, second: <span class="number">40</span>, nanosecond: <span class="number">12_345_678</span>, offset: <span class="number">32400</span>),
             <span class="prelude-val">Err</span>(IMPOSSIBLE)
         );
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(FixedOffset::east_opt(<span class="number">32400</span>).unwrap();
                           year: <span class="number">2014</span>, ordinal: <span class="number">365</span>, hour_div_12: <span class="number">0</span>, hour_mod_12: <span class="number">4</span>,
                           minute: <span class="number">26</span>, second: <span class="number">40</span>, nanosecond: <span class="number">12_345_678</span>, offset: <span class="number">0</span>),
             <span class="prelude-val">Err</span>(IMPOSSIBLE)
         );
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(FixedOffset::east_opt(<span class="number">32400</span>).unwrap();
                           year: <span class="number">2014</span>, ordinal: <span class="number">365</span>, hour_div_12: <span class="number">1</span>, hour_mod_12: <span class="number">1</span>,
                           minute: <span class="number">26</span>, second: <span class="number">40</span>, nanosecond: <span class="number">12_345_678</span>, offset: <span class="number">32400</span>),
             <span class="prelude-val">Ok</span>(FixedOffset::east_opt(<span class="number">32400</span>)
                 .unwrap()
                 .from_local_datetime(
                     <span class="kw-2">&amp;</span>NaiveDate::from_ymd_opt(<span class="number">2014</span>, <span class="number">12</span>, <span class="number">31</span>)
                         .unwrap()
                         .and_hms_nano_opt(<span class="number">13</span>, <span class="number">26</span>, <span class="number">40</span>, <span class="number">12_345_678</span>)
                         .unwrap()
                 )
                 .unwrap())
         );

         <span class="comment">// single result from timestamp
         </span><span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(Utc; timestamp: <span class="number">1_420_000_000</span>, offset: <span class="number">0</span>),
             <span class="prelude-val">Ok</span>(Utc.with_ymd_and_hms(<span class="number">2014</span>, <span class="number">12</span>, <span class="number">31</span>, <span class="number">4</span>, <span class="number">26</span>, <span class="number">40</span>).unwrap())
         );
         <span class="macro">assert_eq!</span>(<span class="macro">parse!</span>(Utc; timestamp: <span class="number">1_420_000_000</span>, offset: <span class="number">32400</span>), <span class="prelude-val">Err</span>(IMPOSSIBLE));
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(FixedOffset::east_opt(<span class="number">32400</span>).unwrap(); timestamp: <span class="number">1_420_000_000</span>, offset: <span class="number">0</span>),
             <span class="prelude-val">Err</span>(IMPOSSIBLE)
         );
         <span class="macro">assert_eq!</span>(
             <span class="macro">parse!</span>(FixedOffset::east_opt(<span class="number">32400</span>).unwrap(); timestamp: <span class="number">1_420_000_000</span>, offset: <span class="number">32400</span>),
             <span class="prelude-val">Ok</span>(FixedOffset::east_opt(<span class="number">32400</span>)
                 .unwrap()
                 .with_ymd_and_hms(<span class="number">2014</span>, <span class="number">12</span>, <span class="number">31</span>, <span class="number">13</span>, <span class="number">26</span>, <span class="number">40</span>)
                 .unwrap())
         );

         <span class="comment">// TODO test with a variable time zone (for None and Ambiguous cases)
     </span>}

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>issue_551() {
         <span class="kw">use </span><span class="kw">crate</span>::Weekday;
         <span class="kw">let </span><span class="kw-2">mut </span>parsed = Parsed::new();

         parsed.year = <span class="prelude-val">Some</span>(<span class="number">2002</span>);
         parsed.week_from_mon = <span class="prelude-val">Some</span>(<span class="number">22</span>);
         parsed.weekday = <span class="prelude-val">Some</span>(Weekday::Mon);
         <span class="macro">assert_eq!</span>(NaiveDate::from_ymd_opt(<span class="number">2002</span>, <span class="number">6</span>, <span class="number">3</span>).unwrap(), parsed.to_naive_date().unwrap());

         parsed.year = <span class="prelude-val">Some</span>(<span class="number">2001</span>);
         <span class="macro">assert_eq!</span>(NaiveDate::from_ymd_opt(<span class="number">2001</span>, <span class="number">5</span>, <span class="number">28</span>).unwrap(), parsed.to_naive_date().unwrap());
     }
 }
 </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>