<!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="API documentation for the Rust `SystemTimeError` struct in crate `std`."><meta name="keywords" content="rust, rustlang, rust-lang, SystemTimeError"><title>std::time::SystemTimeError - Rust</title><link rel="stylesheet" type="text/css" href="../../normalize.css"><link rel="stylesheet" type="text/css" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../dark.css"><link rel="stylesheet" type="text/css" href="../../light.css" id="themeStyle"><script src="../../storage.js"></script><link rel="shortcut icon" href="https://doc.rust-lang.org/favicon.ico"></head><body class="rustdoc struct"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">☰</div><a href='../../std/index.html'><img src='https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png' alt='logo' width='100'></a><p class='location'>Struct SystemTimeError</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#methods">Methods</a><div class="sidebar-links"><a href="#method.duration">duration</a></div><a class="sidebar-title" href="#implementations">Trait Implementations</a><div class="sidebar-links"><a href="#impl-Clone">Clone</a><a href="#impl-Debug">Debug</a><a href="#impl-Error">Error</a><a href="#impl-Display">Display</a></div><a class="sidebar-title" href="#synthetic-implementations">Auto Trait Implementations</a><div class="sidebar-links"><a href="#impl-Send">Send</a><a href="#impl-Sync">Sync</a></div></div><p class='location'><a href='../index.html'>std</a>::<wbr><a href='index.html'>time</a></p><script>window.sidebarCurrent = {name: 'SystemTimeError', ty: 'struct', relpath: ''};</script><script defer src="sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../../theme.js"></script><nav class="sub"><form class="search-form js-only"><div class="search-container"><input class="search-input" name="search" autocomplete="off" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><a id="settings-menu" href="../../settings.html"><img src="../../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class='fqn'><span class='in-band'>Struct <a href='../index.html'>std</a>::<wbr><a href='index.html'>time</a>::<wbr><a class="struct" href=''>SystemTimeError</a></span><span class='out-of-band'><span class='since' title='Stable since Rust version 1.8.0'>1.8.0</span><span id='render-detail'><a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class='inner'>−</span>]</a></span><a class='srclink' href='../../src/std/time.rs.html#149' title='goto source code'>[src]</a></span></h1><div class="docblock type-decl"><pre class='rust struct'>pub struct SystemTimeError(_);</pre></div><div class='docblock'><p>An error returned from the <code>duration_since</code> and <code>elapsed</code> methods on
<code>SystemTime</code>, used to learn how far in the opposite direction a system time
lies.</p>
<h1 id="examples" class="section-header"><a href="#examples">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">thread</span>::<span class="ident">sleep</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">time</span>::{<span class="ident">Duration</span>, <span class="ident">SystemTime</span>};
<span class="kw">let</span> <span class="ident">sys_time</span> <span class="op">=</span> <span class="ident">SystemTime</span>::<span class="ident">now</span>();
<span class="ident">sleep</span>(<span class="ident">Duration</span>::<span class="ident">from_secs</span>(<span class="number">1</span>));
<span class="kw">let</span> <span class="ident">new_sys_time</span> <span class="op">=</span> <span class="ident">SystemTime</span>::<span class="ident">now</span>();
<span class="kw">match</span> <span class="ident">sys_time</span>.<span class="ident">duration_since</span>(<span class="ident">new_sys_time</span>) {
<span class="prelude-val">Ok</span>(<span class="kw">_</span>) <span class="op">=></span> {}
<span class="prelude-val">Err</span>(<span class="ident">e</span>) <span class="op">=></span> <span class="macro">println</span><span class="macro">!</span>(<span class="string">"SystemTimeError difference: {:?}"</span>, <span class="ident">e</span>.<span class="ident">duration</span>()),
}<a class="test-arrow" target="_blank" href="https://play.rust-lang.org/?code=%23!%5Ballow(unused)%5D%0Afn%20main()%20%7B%0Ause%20std%3A%3Athread%3A%3Asleep%3B%0Ause%20std%3A%3Atime%3A%3A%7BDuration%2C%20SystemTime%7D%3B%0A%0Alet%20sys_time%20%3D%20SystemTime%3A%3Anow()%3B%0Asleep(Duration%3A%3Afrom_secs(1))%3B%0Alet%20new_sys_time%20%3D%20SystemTime%3A%3Anow()%3B%0Amatch%20sys_time.duration_since(new_sys_time)%20%7B%0A%20%20%20%20Ok(_)%20%3D%3E%20%7B%7D%0A%20%20%20%20Err(e)%20%3D%3E%20println!(%22SystemTimeError%20difference%3A%20%7B%3A%3F%7D%22%2C%20e.duration())%2C%0A%7D%0A%7D">Run</a></pre>
</div>
<h2 id='methods' class='small-section-header'>
Methods<a href='#methods' class='anchor'></a>
</h2>
<h3 id='impl' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="struct" href="../../std/time/struct.SystemTimeError.html" title="struct std::time::SystemTimeError">SystemTimeError</a></code><a href='#impl' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/std/time.rs.html#425-455' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.duration' class="method"><span id='duration.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.duration' class='fnname'>duration</a>(&self) -> <a class="struct" href="../../std/time/struct.Duration.html" title="struct std::time::Duration">Duration</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/std/time.rs.html#452-454' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns the positive duration which represents how far forward the
second system time was from the first.</p>
<p>A <code>SystemTimeError</code> is returned from the <a href="../../std/time/struct.SystemTime.html#method.duration_since"><code>duration_since</code></a> and <a href="../../std/time/struct.SystemTime.html#method.elapsed"><code>elapsed</code></a>
methods of <a href="../../std/time/struct.SystemTime.html"><code>SystemTime</code></a> whenever the second system time represents a point later
in time than the <code>self</code> of the method call.</p>
<h1 id="examples-1" class="section-header"><a href="#examples-1">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">thread</span>::<span class="ident">sleep</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">time</span>::{<span class="ident">Duration</span>, <span class="ident">SystemTime</span>};
<span class="kw">let</span> <span class="ident">sys_time</span> <span class="op">=</span> <span class="ident">SystemTime</span>::<span class="ident">now</span>();
<span class="ident">sleep</span>(<span class="ident">Duration</span>::<span class="ident">from_secs</span>(<span class="number">1</span>));
<span class="kw">let</span> <span class="ident">new_sys_time</span> <span class="op">=</span> <span class="ident">SystemTime</span>::<span class="ident">now</span>();
<span class="kw">match</span> <span class="ident">sys_time</span>.<span class="ident">duration_since</span>(<span class="ident">new_sys_time</span>) {
<span class="prelude-val">Ok</span>(<span class="kw">_</span>) <span class="op">=></span> {}
<span class="prelude-val">Err</span>(<span class="ident">e</span>) <span class="op">=></span> <span class="macro">println</span><span class="macro">!</span>(<span class="string">"SystemTimeError difference: {:?}"</span>, <span class="ident">e</span>.<span class="ident">duration</span>()),
}<a class="test-arrow" target="_blank" href="https://play.rust-lang.org/?code=%23!%5Ballow(unused)%5D%0Afn%20main()%20%7B%0Ause%20std%3A%3Athread%3A%3Asleep%3B%0Ause%20std%3A%3Atime%3A%3A%7BDuration%2C%20SystemTime%7D%3B%0A%0Alet%20sys_time%20%3D%20SystemTime%3A%3Anow()%3B%0Asleep(Duration%3A%3Afrom_secs(1))%3B%0Alet%20new_sys_time%20%3D%20SystemTime%3A%3Anow()%3B%0Amatch%20sys_time.duration_since(new_sys_time)%20%7B%0A%20%20%20%20Ok(_)%20%3D%3E%20%7B%7D%0A%20%20%20%20Err(e)%20%3D%3E%20println!(%22SystemTimeError%20difference%3A%20%7B%3A%3F%7D%22%2C%20e.duration())%2C%0A%7D%0A%7D">Run</a></pre>
</div></div>
<h2 id='implementations' class='small-section-header'>
Trait Implementations<a href='#implementations' class='anchor'></a>
</h2>
<div id='implementations-list'><h3 id='impl-Clone' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="../../std/clone/trait.Clone.html" title="trait std::clone::Clone">Clone</a> for <a class="struct" href="../../std/time/struct.SystemTimeError.html" title="struct std::time::SystemTimeError">SystemTimeError</a></code><a href='#impl-Clone' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/std/time.rs.html#147' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.clone' class="method"><span id='clone.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../../std/clone/trait.Clone.html#tymethod.clone' class='fnname'>clone</a>(&self) -> <a class="struct" href="../../std/time/struct.SystemTimeError.html" title="struct std::time::SystemTimeError">SystemTimeError</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/std/time.rs.html#147' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns a copy of the value. <a href="../../std/clone/trait.Clone.html#tymethod.clone">Read more</a></p>
</div><h4 id='method.clone_from' class="method"><span id='clone_from.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../../std/clone/trait.Clone.html#method.clone_from' class='fnname'>clone_from</a>(&mut self, source: <a class="primitive" href="../primitive.reference.html">&</a>Self)</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='../../src/core/clone.rs.html#130-132' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Performs copy-assignment from <code>source</code>. <a href="../../std/clone/trait.Clone.html#method.clone_from">Read more</a></p>
</div></div><h3 id='impl-Debug' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="../../std/fmt/trait.Debug.html" title="trait std::fmt::Debug">Debug</a> for <a class="struct" href="../../std/time/struct.SystemTimeError.html" title="struct std::time::SystemTimeError">SystemTimeError</a></code><a href='#impl-Debug' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/std/time.rs.html#147' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.fmt' class="method"><span id='fmt.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../../std/fmt/trait.Debug.html#tymethod.fmt' class='fnname'>fmt</a>(&self, f: &mut <a class="struct" href="../../std/fmt/struct.Formatter.html" title="struct std::fmt::Formatter">Formatter</a>) -> <a class="type" href="../../std/fmt/type.Result.html" title="type std::fmt::Result">Result</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/std/time.rs.html#147' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Formats the value using the given formatter. <a href="../../std/fmt/trait.Debug.html#tymethod.fmt">Read more</a></p>
</div></div><h3 id='impl-Error' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="../../std/error/trait.Error.html" title="trait std::error::Error">Error</a> for <a class="struct" href="../../std/time/struct.SystemTimeError.html" title="struct std::time::SystemTimeError">SystemTimeError</a></code><a href='#impl-Error' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/std/time.rs.html#458-460' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.description' class="method"><span id='description.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../../std/error/trait.Error.html#method.description' class='fnname'>description</a>(&self) -> &<a class="primitive" href="../primitive.str.html">str</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/std/time.rs.html#459' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>This method is soft-deprecated. <a href="../../std/error/trait.Error.html#method.description">Read more</a></p>
</div><h4 id='method.cause' class="method"><span id='cause.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../../std/error/trait.Error.html#method.cause' class='fnname'>cause</a>(&self) -> <a class="enum" href="../../std/option/enum.Option.html" title="enum std::option::Option">Option</a><&<a class="trait" href="../../std/error/trait.Error.html" title="trait std::error::Error">Error</a>></code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='../../src/std/error.rs.html#140' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>The lower-level cause of this error, if any. <a href="../../std/error/trait.Error.html#method.cause">Read more</a></p>
</div></div><h3 id='impl-Display' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="../../std/fmt/trait.Display.html" title="trait std::fmt::Display">Display</a> for <a class="struct" href="../../std/time/struct.SystemTimeError.html" title="struct std::time::SystemTimeError">SystemTimeError</a></code><a href='#impl-Display' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/std/time.rs.html#463-467' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.fmt-1' class="method"><span id='fmt.v-1' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../../std/fmt/trait.Display.html#tymethod.fmt' class='fnname'>fmt</a>(&self, f: &mut <a class="struct" href="../../std/fmt/struct.Formatter.html" title="struct std::fmt::Formatter">Formatter</a>) -> <a class="type" href="../../std/fmt/type.Result.html" title="type std::fmt::Result">Result</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/std/time.rs.html#464-466' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Formats the value using the given formatter. <a href="../../std/fmt/trait.Display.html#tymethod.fmt">Read more</a></p>
</div></div></div>
<h2 id='synthetic-implementations' class='small-section-header'>
Auto Trait Implementations<a href='#synthetic-implementations' class='anchor'></a>
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<h3 id='impl-Send' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="../../std/marker/trait.Send.html" title="trait std::marker::Send">Send</a> for <a class="struct" href="../../std/time/struct.SystemTimeError.html" title="struct std::time::SystemTimeError">SystemTimeError</a></code><a href='#impl-Send' class='anchor'></a></span></td><td><span class='out-of-band'></span></td></tr></tbody></table></h3><div class='impl-items'></div><h3 id='impl-Sync' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="../../std/marker/trait.Sync.html" title="trait std::marker::Sync">Sync</a> for <a class="struct" href="../../std/time/struct.SystemTimeError.html" title="struct std::time::SystemTimeError">SystemTimeError</a></code><a href='#impl-Sync' class='anchor'></a></span></td><td><span class='out-of-band'></span></td></tr></tbody></table></h3><div class='impl-items'></div></div></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><kbd>?</kbd></dt><dd>Show this help dialog</dd><dt><kbd>S</kbd></dt><dd>Focus the search field</dd><dt><kbd>↑</kbd></dt><dd>Move up in search results</dd><dt><kbd>↓</kbd></dt><dd>Move down in search results</dd><dt><kbd>↹</kbd></dt><dd>Switch tab</dd><dt><kbd>⏎</kbd></dt><dd>Go to active search result</dd><dt><kbd>+</kbd></dt><dd>Expand all sections</dd><dt><kbd>-</kbd></dt><dd>Collapse 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><p>Search multiple things at once by splitting your query with comma (e.g. <code>str,u8</code> or <code>String,struct:Vec,test</code>)</p></div></div></aside><script>window.rootPath = "../../";window.currentCrate = "std";</script><script src="../../aliases.js"></script><script src="../../main.js"></script><script defer src="../../search-index.js"></script></body></html>
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