559 lines
16 KiB
HTML
559 lines
16 KiB
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<!DOCTYPE html>
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<meta name="generator" content="rustdoc">
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<meta name="description" content="API documentation for the Rust `strftime` mod in crate `chrono`.">
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<meta name="keywords" content="rust, rustlang, rust-lang, strftime">
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<title>chrono::format::strftime - Rust</title>
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<link rel="stylesheet" type="text/css" href="../../../normalize.css">
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<link rel="stylesheet" type="text/css" href="../../../rustdoc.css">
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</head>
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<body class="rustdoc mod">
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things.
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<![endif]-->
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<nav class="sidebar">
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<p class='location'>Module strftime</p><div class="block items"><ul><li><a href="#structs">Structs</a></li></ul></div><p class='location'><a href='../../index.html'>chrono</a>::<wbr><a href='../index.html'>format</a></p><script>window.sidebarCurrent = {name: 'strftime', ty: 'mod', relpath: '../'};</script><script defer src="../sidebar-items.js"></script>
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<form class="search-form js-only">
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<input class="search-input" name="search"
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autocomplete="off"
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placeholder="Click or press ‘S’ to search, ‘?’ for more options…"
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type="search">
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</form>
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</nav>
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<section id='main' class="content">
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<h1 class='fqn'><span class='in-band'>Module <a href='../../index.html'>chrono</a>::<wbr><a href='../index.html'>format</a>::<wbr><a class="mod" href=''>strftime</a></span><span class='out-of-band'><span id='render-detail'>
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<a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">
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[<span class='inner'>−</span>]
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</a>
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</span><a class='srclink' href='../../../src/chrono/format/strftime.rs.html#5-443' title='goto source code'>[src]</a></span></h1>
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<div class='docblock'><p><code>strftime</code>/<code>strptime</code>-inspired date and time formatting syntax.</p>
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<h2 id='specifiers' class='section-header'><a href='#specifiers'>Specifiers</a></h2>
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<p>The following specifiers are available both to formatting and parsing.</p>
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<table>
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<thead>
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<tr>
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<th>Spec.</th>
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<th>Example</th>
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<th>Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td></td>
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<td></td>
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<td><strong>DATE SPECIFIERS:</strong></td>
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</tr>
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<tr>
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<td><code>%Y</code></td>
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<td><code>2001</code></td>
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<td>The full proleptic Gregorian year, zero-padded to 4 digits. [1]</td>
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</tr>
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<tr>
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<td><code>%C</code></td>
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<td><code>20</code></td>
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<td>The proleptic Gregorian year divided by 100, zero-padded to 2 digits. [2]</td>
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</tr>
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<tr>
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<td><code>%y</code></td>
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<td><code>01</code></td>
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<td>The proleptic Gregorian year modulo 100, zero-padded to 2 digits. [2]</td>
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</tr>
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<tr>
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<td></td>
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<td></td>
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<td></td>
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</tr>
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<tr>
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<td><code>%m</code></td>
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<td><code>07</code></td>
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<td>Month number (01--12), zero-padded to 2 digits.</td>
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</tr>
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<tr>
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<td><code>%b</code></td>
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<td><code>Jul</code></td>
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<td>Abbreviated month name. Always 3 letters.</td>
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</tr>
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<tr>
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<td><code>%B</code></td>
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<td><code>July</code></td>
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<td>Full month name. Also accepts corresponding abbreviation in parsing.</td>
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</tr>
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<tr>
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<td><code>%h</code></td>
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<td><code>Jul</code></td>
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<td>Same to <code>%b</code>.</td>
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</tr>
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<tr>
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<td></td>
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<td></td>
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</tr>
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<td><code>%d</code></td>
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<td><code>08</code></td>
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<td>Day number (01--31), zero-padded to 2 digits.</td>
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</tr>
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<td><code>%e</code></td>
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<td><code>8</code></td>
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<td>Same to <code>%d</code> but space-padded. Same to <code>%_d</code>.</td>
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</tr>
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<td></td>
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<td></td>
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<td></td>
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</tr>
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<tr>
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<td><code>%a</code></td>
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<td><code>Sun</code></td>
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<td>Abbreviated weekday name. Always 3 letters.</td>
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</tr>
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<tr>
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<td><code>%A</code></td>
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<td><code>Sunday</code></td>
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<td>Full weekday name. Also accepts corresponding abbreviation in parsing.</td>
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</tr>
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<td><code>%w</code></td>
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<td><code>0</code></td>
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<td>Sunday = 0, Monday = 1, ..., Saturday = 6.</td>
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</tr>
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<tr>
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<td><code>%u</code></td>
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<td><code>7</code></td>
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<td>Monday = 1, Tuesday = 2, ..., Sunday = 7. (ISO 8601)</td>
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</tr>
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<tr>
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<td></td>
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<td></td>
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<td></td>
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</tr>
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<td><code>%U</code></td>
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<td><code>28</code></td>
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<td>Week number starting with Sunday (00--53), zero-padded to 2 digits. [3]</td>
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</tr>
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<td><code>%W</code></td>
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<td><code>27</code></td>
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<td>Same to <code>%U</code>, but week 1 starts with the first Monday in that year instead.</td>
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</tr>
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<tr>
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<td></td>
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<td></td>
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<td></td>
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</tr>
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<td><code>%G</code></td>
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<td><code>2001</code></td>
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<td>Same to <code>%Y</code> but uses the year number in ISO 8601 week date. [4]</td>
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</tr>
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<tr>
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<td><code>%g</code></td>
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<td><code>01</code></td>
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<td>Same to <code>%y</code> but uses the year number in ISO 8601 week date. [4]</td>
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</tr>
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<tr>
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<td><code>%V</code></td>
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<td><code>27</code></td>
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<td>Same to <code>%U</code> but uses the week number in ISO 8601 week date (01--53). [4]</td>
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</tr>
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<tr>
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<td></td>
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<td></td>
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<td></td>
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</tr>
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<td><code>%j</code></td>
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<td><code>189</code></td>
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<td>Day of the year (001--366), zero-padded to 3 digits.</td>
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</tr>
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<tr>
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<td></td>
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<td></td>
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<td></td>
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</tr>
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<tr>
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<td><code>%D</code></td>
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<td><code>07/08/01</code></td>
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<td>Month-day-year format. Same to <code>%m/%d/%y</code>.</td>
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</tr>
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<tr>
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<td><code>%x</code></td>
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<td><code>07/08/01</code></td>
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<td>Same to <code>%D</code>.</td>
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</tr>
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<tr>
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<td><code>%F</code></td>
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<td><code>2001-07-08</code></td>
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<td>Year-month-day format (ISO 8601). Same to <code>%Y-%m-%d</code>.</td>
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</tr>
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<tr>
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<td><code>%v</code></td>
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<td><code>8-Jul-2001</code></td>
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<td>Day-month-year format. Same to <code>%e-%b-%Y</code>.</td>
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</tr>
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<tr>
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<td></td>
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<td></td>
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<td></td>
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</tr>
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<tr>
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<td></td>
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<td></td>
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<td><strong>TIME SPECIFIERS:</strong></td>
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</tr>
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<tr>
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<td><code>%H</code></td>
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<td><code>00</code></td>
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<td>Hour number (00--23), zero-padded to 2 digits.</td>
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</tr>
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<tr>
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<td><code>%k</code></td>
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<td><code>0</code></td>
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<td>Same to <code>%H</code> but space-padded. Same to <code>%_H</code>.</td>
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</tr>
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<tr>
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<td><code>%I</code></td>
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<td><code>12</code></td>
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<td>Hour number in 12-hour clocks (01--12), zero-padded to 2 digits.</td>
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</tr>
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<tr>
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<td><code>%l</code></td>
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<td><code>12</code></td>
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<td>Same to <code>%I</code> but space-padded. Same to <code>%_I</code>.</td>
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</tr>
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<tr>
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<td></td>
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<td></td>
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<td></td>
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</tr>
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<td><code>%P</code></td>
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<td><code>am</code></td>
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<td><code>am</code> or <code>pm</code> in 12-hour clocks.</td>
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</tr>
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<tr>
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<td><code>%p</code></td>
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<td><code>AM</code></td>
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<td><code>AM</code> or <code>PM</code> in 12-hour clocks.</td>
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</tr>
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<tr>
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<td></td>
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<td></td>
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<td></td>
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</tr>
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<tr>
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<td><code>%M</code></td>
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<td><code>34</code></td>
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<td>Minute number (00--59), zero-padded to 2 digits.</td>
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</tr>
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<tr>
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<td><code>%S</code></td>
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<td><code>60</code></td>
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<td>Second number (00--60), zero-padded to 2 digits. [5]</td>
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</tr>
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<tr>
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<td><code>%f</code></td>
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<td><code>026490000</code></td>
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<td>The fractional seconds (in nanoseconds) since last whole second. [8]</td>
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</tr>
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<td><code>%.f</code></td>
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<td><code>.026490</code></td>
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<td>Similar to <code>.%f</code> but left-aligned. [8]</td>
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</tr>
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<tr>
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<td><code>%.3f</code></td>
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<td><code>.026</code></td>
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<td>Similar to <code>.%f</code> but left-aligned but fixed to a length of 3. [8]</td>
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</tr>
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<tr>
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<td><code>%.6f</code></td>
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<td><code>.026490</code></td>
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<td>Similar to <code>.%f</code> but left-aligned but fixed to a length of 6. [8]</td>
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</tr>
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<tr>
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<td><code>%.9f</code></td>
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<td><code>.026490000</code></td>
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<td>Similar to <code>.%f</code> but left-aligned but fixed to a length of 9. [8]</td>
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</tr>
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<tr>
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<td></td>
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<td></td>
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<td></td>
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<td><code>%R</code></td>
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<td><code>00:34</code></td>
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<td>Hour-minute format. Same to <code>%H:%M</code>.</td>
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</tr>
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<tr>
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<td><code>%T</code></td>
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<td><code>00:34:60</code></td>
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<td>Hour-minute-second format. Same to <code>%H:%M:%S</code>.</td>
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</tr>
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<tr>
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<td><code>%X</code></td>
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<td><code>00:34:60</code></td>
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<td>Same to <code>%T</code>.</td>
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</tr>
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<tr>
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<td><code>%r</code></td>
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<td><code>12:34:60 AM</code></td>
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<td>Hour-minute-second format in 12-hour clocks. Same to <code>%I:%M:%S %p</code>.</td>
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</tr>
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<tr>
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|||
|
|
<td></td>
|
|||
|
|
<td></td>
|
|||
|
|
<td></td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td></td>
|
|||
|
|
<td></td>
|
|||
|
|
<td><strong>TIME ZONE SPECIFIERS:</strong></td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td><code>%Z</code></td>
|
|||
|
|
<td><code>ACST</code></td>
|
|||
|
|
<td><em>Formatting only:</em> Local time zone name.</td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td><code>%z</code></td>
|
|||
|
|
<td><code>+0930</code></td>
|
|||
|
|
<td>Offset from the local time to UTC (with UTC being <code>+0000</code>).</td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td><code>%:z</code></td>
|
|||
|
|
<td><code>+09:30</code></td>
|
|||
|
|
<td>Same to <code>%z</code> but with a colon.</td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td></td>
|
|||
|
|
<td></td>
|
|||
|
|
<td></td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td></td>
|
|||
|
|
<td></td>
|
|||
|
|
<td><strong>DATE & TIME SPECIFIERS:</strong></td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td><code>%c</code></td>
|
|||
|
|
<td><code>Sun Jul 8 00:34:60 2001</code></td>
|
|||
|
|
<td><code>ctime</code> date & time format. Same to <code>%a %b %e %T %Y</code> sans <code>\n</code>.</td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td><code>%+</code></td>
|
|||
|
|
<td><code>2001-07-08T00:34:60.026490+09:30</code></td>
|
|||
|
|
<td>ISO 8601 / RFC 3339 date & time format. [6]</td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td></td>
|
|||
|
|
<td></td>
|
|||
|
|
<td></td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td><code>%s</code></td>
|
|||
|
|
<td><code>994518299</code></td>
|
|||
|
|
<td>UNIX timestamp, the number of seconds since 1970-01-01 00:00 UTC. [7]</td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td></td>
|
|||
|
|
<td></td>
|
|||
|
|
<td></td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td></td>
|
|||
|
|
<td></td>
|
|||
|
|
<td><strong>SPECIAL SPECIFIERS:</strong></td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td><code>%t</code></td>
|
|||
|
|
<td></td>
|
|||
|
|
<td>Literal tab (<code>\t</code>).</td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td><code>%n</code></td>
|
|||
|
|
<td></td>
|
|||
|
|
<td>Literal newline (<code>\n</code>).</td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td><code>%%</code></td>
|
|||
|
|
<td></td>
|
|||
|
|
<td>Literal percent sign.</td>
|
|||
|
|
</tr>
|
|||
|
|
</tbody>
|
|||
|
|
</table>
|
|||
|
|
|
|||
|
|
<p>It is possible to override the default padding behavior of numeric specifiers <code>%?</code>.
|
|||
|
|
This is not allowed for other specifiers and will result in the <code>BAD_FORMAT</code> error.</p>
|
|||
|
|
|
|||
|
|
<table>
|
|||
|
|
<thead>
|
|||
|
|
<tr>
|
|||
|
|
<th>Modifier</th>
|
|||
|
|
<th>Description</th>
|
|||
|
|
</tr>
|
|||
|
|
</thead>
|
|||
|
|
|
|||
|
|
<tbody>
|
|||
|
|
<tr>
|
|||
|
|
<td><code>%-?</code></td>
|
|||
|
|
<td>Suppresses any padding including spaces and zeroes. (e.g. <code>%j</code> = <code>012</code>, <code>%-j</code> = <code>12</code>)</td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td><code>%_?</code></td>
|
|||
|
|
<td>Uses spaces as a padding. (e.g. <code>%j</code> = <code>012</code>, <code>%_j</code> = <code>12</code>)</td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td><code>%0?</code></td>
|
|||
|
|
<td>Uses zeroes as a padding. (e.g. <code>%e</code> = <code>9</code>, <code>%0e</code> = <code>09</code>)</td>
|
|||
|
|
</tr>
|
|||
|
|
</tbody>
|
|||
|
|
</table>
|
|||
|
|
|
|||
|
|
<p>Notes:</p>
|
|||
|
|
|
|||
|
|
<ol>
|
|||
|
|
<li><p><code>%Y</code>:
|
|||
|
|
Negative years are allowed in formatting but not in parsing.</p></li>
|
|||
|
|
<li><p><code>%C</code>, <code>%y</code>:
|
|||
|
|
This is floor division, so 100 BCE (year number -99) will print <code>-1</code> and <code>99</code> respectively.</p></li>
|
|||
|
|
<li><p><code>%U</code>:
|
|||
|
|
Week 1 starts with the first Sunday in that year.
|
|||
|
|
It is possible to have week 0 for days before the first Sunday.</p></li>
|
|||
|
|
<li><p><code>%G</code>, <code>%g</code>, <code>%V</code>:
|
|||
|
|
Week 1 is the first week with at least 4 days in that year.
|
|||
|
|
Week 0 does not exist, so this should be used with <code>%G</code> or <code>%g</code>.</p></li>
|
|||
|
|
<li><p><code>%S</code>:
|
|||
|
|
It accounts for leap seconds, so <code>60</code> is possible.</p></li>
|
|||
|
|
<li><p><code>%+</code>:
|
|||
|
|
Same to <code>%Y-%m-%dT%H:%M:%S%.f%:z</code>,
|
|||
|
|
i.e. 0, 3, 6 or 9 fractional digits for seconds and colons in the time zone offset.</p>
|
|||
|
|
|
|||
|
|
<p>The typical <code>strftime</code> implementations have
|
|||
|
|
different (and locale-dependent) formats for this specifier.
|
|||
|
|
While Chrono's format for <code>%+</code> is far more stable,
|
|||
|
|
it is best to avoid this specifier if you want to control the exact output.</p></li>
|
|||
|
|
<li><p><code>%s</code>:
|
|||
|
|
This is not padded and can be negative.
|
|||
|
|
For the purpose of Chrono, it only accounts for non-leap seconds
|
|||
|
|
so it slightly differs from ISO C <code>strftime</code> behavior.</p></li>
|
|||
|
|
<li><p><code>%f</code>, <code>%.f</code>, <code>%.3f</code>, <code>%.6f</code>, <code>%.9f</code>:</p>
|
|||
|
|
|
|||
|
|
<p>The default <code>%f</code> is right-aligned and always zero-padded to 9 digits
|
|||
|
|
for the compatibility with glibc and others,
|
|||
|
|
so it always counts the number of nanoseconds since the last whole second.
|
|||
|
|
E.g. 7ms after the last second will print <code>007000000</code>,
|
|||
|
|
and parsing <code>7000000</code> will yield the same.</p>
|
|||
|
|
|
|||
|
|
<p>The variant <code>%.f</code> is left-aligned and print 0, 3, 6 or 9 fractional digits
|
|||
|
|
according to the precision.
|
|||
|
|
E.g. 70ms after the last second under <code>%.f</code> will print <code>.070</code> (note: not <code>.07</code>),
|
|||
|
|
and parsing <code>.07</code>, <code>.070000</code> etc. will yield the same.
|
|||
|
|
Note that they can print or read nothing if the fractional part is zero or
|
|||
|
|
the next character is not <code>.</code>.</p>
|
|||
|
|
|
|||
|
|
<p>The variant <code>%.3f</code>, <code>%.6f</code> and <code>%.9f</code> are left-aligned and print 3, 6 or 9 fractional digits
|
|||
|
|
according to the number preceding <code>f</code>.
|
|||
|
|
E.g. 70ms after the last second under <code>%.3f</code> will print <code>.070</code> (note: not <code>.07</code>),
|
|||
|
|
and parsing <code>.07</code>, <code>.070000</code> etc. will yield the same.
|
|||
|
|
Note that they can read nothing if the fractional part is zero or
|
|||
|
|
the next character is not <code>.</code> however will print with the specified length.</p></li>
|
|||
|
|
</ol>
|
|||
|
|
</div><h2 id='structs' class='section-header'><a href="#structs">Structs</a></h2>
|
|||
|
|
<table>
|
|||
|
|
<tr class=' module-item'>
|
|||
|
|
<td><a class="struct" href="struct.StrftimeItems.html"
|
|||
|
|
title='struct chrono::format::strftime::StrftimeItems'>StrftimeItems</a></td>
|
|||
|
|
<td class='docblock-short'>
|
|||
|
|
<p>Parsing iterator for <code>strftime</code>-like format strings.</p>
|
|||
|
|
</td>
|
|||
|
|
</tr></table></section>
|
|||
|
|
<section id='search' class="content hidden"></section>
|
|||
|
|
|
|||
|
|
<section class="footer"></section>
|
|||
|
|
|
|||
|
|
<aside id="help" class="hidden">
|
|||
|
|
<div>
|
|||
|
|
<h1 class="hidden">Help</h1>
|
|||
|
|
|
|||
|
|
<div class="shortcuts">
|
|||
|
|
<h2>Keyboard Shortcuts</h2>
|
|||
|
|
|
|||
|
|
<dl>
|
|||
|
|
<dt>?</dt>
|
|||
|
|
<dd>Show this help dialog</dd>
|
|||
|
|
<dt>S</dt>
|
|||
|
|
<dd>Focus the search field</dd>
|
|||
|
|
<dt>⇤</dt>
|
|||
|
|
<dd>Move up in search results</dd>
|
|||
|
|
<dt>⇥</dt>
|
|||
|
|
<dd>Move down in search results</dd>
|
|||
|
|
<dt>⏎</dt>
|
|||
|
|
<dd>Go to active search result</dd>
|
|||
|
|
<dt>+</dt>
|
|||
|
|
<dd>Collapse/expand all sections</dd>
|
|||
|
|
</dl>
|
|||
|
|
</div>
|
|||
|
|
|
|||
|
|
<div class="infos">
|
|||
|
|
<h2>Search Tricks</h2>
|
|||
|
|
|
|||
|
|
<p>
|
|||
|
|
Prefix searches with a type followed by a colon (e.g.
|
|||
|
|
<code>fn:</code>) to restrict the search to a given type.
|
|||
|
|
</p>
|
|||
|
|
|
|||
|
|
<p>
|
|||
|
|
Accepted types are: <code>fn</code>, <code>mod</code>,
|
|||
|
|
<code>struct</code>, <code>enum</code>,
|
|||
|
|
<code>trait</code>, <code>type</code>, <code>macro</code>,
|
|||
|
|
and <code>const</code>.
|
|||
|
|
</p>
|
|||
|
|
|
|||
|
|
<p>
|
|||
|
|
Search functions by type signature (e.g.
|
|||
|
|
<code>vec -> usize</code> or <code>* -> vec</code>)
|
|||
|
|
</p>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</aside>
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
<script>
|
|||
|
|
window.rootPath = "../../../";
|
|||
|
|
window.currentCrate = "chrono";
|
|||
|
|
</script>
|
|||
|
|
<script src="../../../main.js"></script>
|
|||
|
|
<script defer src="../../../search-index.js"></script>
|
|||
|
|
</body>
|
|||
|
|
</html>
|