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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="API documentation for the Rust `ManuallyDrop` union in crate `std`."><meta name="keywords" content="rust, rustlang, rust-lang, ManuallyDrop"><title>std::mem::ManuallyDrop - 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 union"><!--[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">&#9776;</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'>Union ManuallyDrop</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#methods">Methods</a><div class="sidebar-links"><a href="#method.new">new</a><a href="#method.into_inner">into_inner</a><a href="#method.drop">drop</a></div><a class="sidebar-title" href="#implementations">Trait Implementations</a><div class="sidebar-links"><a href="#impl-PartialEq%3CManuallyDrop%3CT%3E%3E">PartialEq&lt;ManuallyDrop&lt;T&gt;&gt;</a><a href="#impl-Ord">Ord</a><a href="#impl-PartialOrd%3CManuallyDrop%3CT%3E%3E">PartialOrd&lt;ManuallyDrop&lt;T&gt;&gt;</a><a href="#impl-Debug">Debug</a><a href="#impl-Deref">Deref</a><a href="#impl-DerefMut">DerefMut</a><a href="#impl-Hash">Hash</a><a href="#impl-Eq">Eq</a><a href="#impl-Clone">Clone</a><a href="#impl-Copy">Copy</a><a href="#impl-Default">Default</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'>mem</a></p><script>window.sidebarCurrent = {name: 'ManuallyDrop', ty: 'union', 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'>Union <a href='../index.html'>std</a>::<wbr><a href='index.html'>mem</a>::<wbr><a class="union" href=''>ManuallyDrop</a></span><span class='out-of-band'><span class='since' title='Stable since Rust version 1.20.0'>1.20.0</span><span id='render-detail'><a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class='inner'>&#x2212;</span>]</a></span><a class='srclink' href='../../src/core/mem.rs.html#955' title='goto source code'>[src]</a></span></h1><div class="docblock type-decl"><pre class='rust union'>pub union ManuallyDrop&lt;T&gt; {
    // some fields omitted
}</pre></div><div class='docblock'><p>A wrapper to inhibit compiler from automatically calling <code>T</code>’s destructor.</p>
<p>This wrapper is 0-cost.</p>
<h1 id="examples" class="section-header"><a href="#examples">Examples</a></h1>
<p>This wrapper helps with explicitly documenting the drop order dependencies between fields of
the type:</p>

<pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">mem</span>::<span class="ident">ManuallyDrop</span>;
<span class="kw">struct</span> <span class="ident">Peach</span>;
<span class="kw">struct</span> <span class="ident">Banana</span>;
<span class="kw">struct</span> <span class="ident">Melon</span>;
<span class="kw">struct</span> <span class="ident">FruitBox</span> {
    <span class="comment">// Immediately clear there’s something non-trivial going on with these fields.</span>
    <span class="ident">peach</span>: <span class="ident">ManuallyDrop</span><span class="op">&lt;</span><span class="ident">Peach</span><span class="op">&gt;</span>,
    <span class="ident">melon</span>: <span class="ident">Melon</span>, <span class="comment">// Field that’s independent of the other two.</span>
    <span class="ident">banana</span>: <span class="ident">ManuallyDrop</span><span class="op">&lt;</span><span class="ident">Banana</span><span class="op">&gt;</span>,
}

<span class="kw">impl</span> <span class="ident">Drop</span> <span class="kw">for</span> <span class="ident">FruitBox</span> {
    <span class="kw">fn</span> <span class="ident">drop</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="self">self</span>) {
        <span class="kw">unsafe</span> {
            <span class="comment">// Explicit ordering in which field destructors are run specified in the intuitive</span>
            <span class="comment">// location – the destructor of the structure containing the fields.</span>
            <span class="comment">// Moreover, one can now reorder fields within the struct however much they want.</span>
            <span class="ident">ManuallyDrop</span>::<span class="ident">drop</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="self">self</span>.<span class="ident">peach</span>);
            <span class="ident">ManuallyDrop</span>::<span class="ident">drop</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="self">self</span>.<span class="ident">banana</span>);
        }
        <span class="comment">// After destructor for `FruitBox` runs (this function), the destructor for Melon gets</span>
        <span class="comment">// invoked in the usual manner, as it is not wrapped in `ManuallyDrop`.</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%3Amem%3A%3AManuallyDrop%3B%0Astruct%20Peach%3B%0Astruct%20Banana%3B%0Astruct%20Melon%3B%0Astruct%20FruitBox%20%7B%0A%20%20%20%20%2F%2F%20Immediately%20clear%20there%E2%80%99s%20something%20non-trivial%20going%20on%20with%20these%20fields.%0A%20%20%20%20peach%3A%20ManuallyDrop%3CPeach%3E%2C%0A%20%20%20%20melon%3A%20Melon%2C%20%2F%2F%20Field%20that%E2%80%99s%20independent%20of%20the%20other%20two.%0A%20%20%20%20banana%3A%20ManuallyDrop%3CBanana%3E%2C%0A%7D%0A%0Aimpl%20Drop%20for%20FruitBox%20%7B%0A%20%20%20%20fn%20drop(%26mut%20self)%20%7B%0A%20%20%20%20%20%20%20%20unsafe%20%7B%0A%20%20%20%20%20%20%20%20%20%20%20%20%2F%2F%20Explicit%20ordering%20in%20which%20field%20destructors%20are%20run%20specified%20in%20the%20intuitive%0A%20%20%20%20%20%20%20%20%20%20%20%20%2F%2F%20location%20%E2%80%93%20the%20destructor%20of%20the%20structure%20containing%20the%20fields.%0A%20%20%20%20%20%20%20%20%20%20%20%20%2F%2F%20Moreover%2C%20one%20can%20now%20reorder%20fields%20within%20the%20struct%20however%20much%20they%20want.%0A%20%20%20%20%20%20%20%20%20%20%20%20ManuallyDrop%3A%3Adrop(%26mut%20self.peach)%3B%0A%20%20%20%20%20%20%20%20%20%20%20%20ManuallyDrop%3A%3Adrop(%26mut%20self.banana)%3B%0A%20%20%20%20%20%20%20%20%7D%0A%20%20%20%20%20%20%20%20%2F%2F%20After%20destructor%20for%20%60FruitBox%60%20runs%20(this%20function)%2C%20the%20destructor%20for%20Melon%20gets%0A%20%20%20%20%20%20%20%20%2F%2F%20invoked%20in%20the%20usual%20manner%2C%20as%20it%20is%20not%20wrapped%20in%20%60ManuallyDrop%60.%0A%20%20%20%20%7D%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&lt;T&gt; <a class="union" href="../../std/mem/union.ManuallyDrop.html" title="union std::mem::ManuallyDrop">ManuallyDrop</a>&lt;T&gt;</code><a href='#impl' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/core/mem.rs.html#957-1002' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.new' class="method"><span id='new.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub const fn <a href='#method.new' class='fnname'>new</a>(value: T) -&gt; <a class="union" href="../../std/mem/union.ManuallyDrop.html" title="union std::mem::ManuallyDrop">ManuallyDrop</a>&lt;T&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/core/mem.rs.html#969-971' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Wrap a value to be manually dropped.</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">mem</span>::<span class="ident">ManuallyDrop</span>;
<span class="ident">ManuallyDrop</span>::<span class="ident">new</span>(<span class="ident">Box</span>::<span class="ident">new</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%3Amem%3A%3AManuallyDrop%3B%0AManuallyDrop%3A%3Anew(Box%3A%3Anew(()))%3B%0A%7D">Run</a></pre>
</div><h4 id='method.into_inner' class="method"><span id='into_inner.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.into_inner' class='fnname'>into_inner</a>(slot: <a class="union" href="../../std/mem/union.ManuallyDrop.html" title="union std::mem::ManuallyDrop">ManuallyDrop</a>&lt;T&gt;) -&gt; T</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/core/mem.rs.html#984-988' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Extract the value from the ManuallyDrop container.</p>
<h1 id="examples-2" class="section-header"><a href="#examples-2">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">mem</span>::<span class="ident">ManuallyDrop</span>;
<span class="kw">let</span> <span class="ident">x</span> <span class="op">=</span> <span class="ident">ManuallyDrop</span>::<span class="ident">new</span>(<span class="ident">Box</span>::<span class="ident">new</span>(()));
<span class="kw">let</span> <span class="kw">_</span>: <span class="ident">Box</span><span class="op">&lt;</span>()<span class="op">&gt;</span> <span class="op">=</span> <span class="ident">ManuallyDrop</span>::<span class="ident">into_inner</span>(<span class="ident">x</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%3Amem%3A%3AManuallyDrop%3B%0Alet%20x%20%3D%20ManuallyDrop%3A%3Anew(Box%3A%3Anew(()))%3B%0Alet%20_%3A%20Box%3C()%3E%20%3D%20ManuallyDrop%3A%3Ainto_inner(x)%3B%0A%7D">Run</a></pre>
</div><h4 id='method.drop' class="method"><span id='drop.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub unsafe fn <a href='#method.drop' class='fnname'>drop</a>(slot: &amp;mut <a class="union" href="../../std/mem/union.ManuallyDrop.html" title="union std::mem::ManuallyDrop">ManuallyDrop</a>&lt;T&gt;)</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/core/mem.rs.html#999-1001' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Manually drops the contained value.</p>
<h1 id="safety" class="section-header"><a href="#safety">Safety</a></h1>
<p>This function runs the destructor of the contained value and thus the wrapped value
now represents uninitialized data. It is up to the user of this method to ensure the
uninitialized data is not actually used.</p>
</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-PartialEq%3CManuallyDrop%3CT%3E%3E' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl&lt;T&gt; <a class="trait" href="../../std/cmp/trait.PartialEq.html" title="trait std::cmp::PartialEq">PartialEq</a>&lt;<a class="union" href="../../std/mem/union.ManuallyDrop.html" title="union std::mem::ManuallyDrop">ManuallyDrop</a>&lt;T&gt;&gt; for <a class="union" href="../../std/mem/union.ManuallyDrop.html" title="union std::mem::ManuallyDrop">ManuallyDrop</a>&lt;T&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;T: <a class="trait" href="../../std/cmp/trait.PartialEq.html" title="trait std::cmp::PartialEq">PartialEq</a>&lt;T&gt;,&nbsp;</span></code><a href='#impl-PartialEq%3CManuallyDrop%3CT%3E%3E' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.22.0'>1.22.0</div><a class='srclink' href='../../src/core/mem.rs.html#1053-1061' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.eq' class="method"><span id='eq.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../../std/cmp/trait.PartialEq.html#tymethod.eq' class='fnname'>eq</a>(&amp;self, other: &amp;<a class="union" href="../../std/mem/union.ManuallyDrop.html" title="union std::mem::ManuallyDrop">ManuallyDrop</a>&lt;T&gt;) -&gt; <a class="primitive" href="../primitive.bool.html">bool</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/core/mem.rs.html#1054-1056' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>This method tests for <code>self</code> and <code>other</code> values to be equal, and is used by <code>==</code>. <a href="../../std/cmp/trait.PartialEq.html#tymethod.eq">Read more</a></p>
</div><h4 id='method.ne' class="method"><span id='ne.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../../std/cmp/trait.PartialEq.html#method.ne' class='fnname'>ne</a>(&amp;self, other: &amp;<a class="union" href="../../std/mem/union.ManuallyDrop.html" title="union std::mem::ManuallyDrop">ManuallyDrop</a>&lt;T&gt;) -&gt; <a class="primitive" href="../primitive.bool.html">bool</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/core/mem.rs.html#1058-1060' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>This method tests for <code>!=</code>.</p>
</div></div><h3 id='impl-Ord' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl&lt;T&gt; <a class="trait" href="../../std/cmp/trait.Ord.html" title="trait std::cmp::Ord">Ord</a> for <a class="union" href="../../std/mem/union.ManuallyDrop.html" title="union std::mem::ManuallyDrop">ManuallyDrop</a>&lt;T&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;T: <a class="trait" href="../../std/cmp/trait.Ord.html" title="trait std::cmp::Ord">Ord</a>,&nbsp;</span></code><a href='#impl-Ord' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.22.0'>1.22.0</div><a class='srclink' href='../../src/core/mem.rs.html#1090-1094' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.cmp' class="method"><span id='cmp.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../../std/cmp/trait.Ord.html#tymethod.cmp' class='fnname'>cmp</a>(&amp;self, other: &amp;<a class="union" href="../../std/mem/union.ManuallyDrop.html" title="union std::mem::ManuallyDrop">ManuallyDrop</a>&lt;T&gt;) -&gt; <a class="enum" href="../../std/cmp/enum.Ordering.html" title="enum std::cmp::Ordering">Ordering</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/core/mem.rs.html#1091-1093' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>This method returns an <code>Ordering</code> between <code>self</code> and <code>other</code>. <a href="../../std/cmp/trait.Ord.html#tymethod.cmp">Read more</a></p>
</div><h4 id='method.max' class="method"><span id='max.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../../std/cmp/trait.Ord.html#method.max' class='fnname'>max</a>(self, other: Self) -&gt; Self</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.21.0'>1.21.0</div><a class='srclink' href='../../src/core/cmp.rs.html#469-472' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Compares and returns the maximum of two values. <a href="../../std/cmp/trait.Ord.html#method.max">Read more</a></p>
</div><h4 id='method.min' class="method"><span id='min.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../../std/cmp/trait.Ord.html#method.min' class='fnname'>min</a>(self, other: Self) -&gt; Self</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.21.0'>1.21.0</div><a class='srclink' href='../../src/core/cmp.rs.html#485-488' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Compares and returns the minimum of two values. <a href="../../std/cmp/trait.Ord.html#method.min">Read more</a></p>
</div></div><h3 id='impl-PartialOrd%3CManuallyDrop%3CT%3E%3E' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl&lt;T&gt; <a class="trait" href="../../std/cmp/trait.PartialOrd.html" title="trait std::cmp::PartialOrd">PartialOrd</a>&lt;<a class="union" href="../../std/mem/union.ManuallyDrop.html" title="union std::mem::ManuallyDrop">ManuallyDrop</a>&lt;T&gt;&gt; for <a class="union" href="../../std/mem/union.ManuallyDrop.html" title="union std::mem::ManuallyDrop">ManuallyDrop</a>&lt;T&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;T: <a class="trait" href="../../std/cmp/trait.PartialOrd.html" title="trait std::cmp::PartialOrd">PartialOrd</a>&lt;T&gt;,&nbsp;</span></code><a href='#impl-PartialOrd%3CManuallyDrop%3CT%3E%3E' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.22.0'>1.22.0</div><a class='srclink' href='../../src/core/mem.rs.html#1067-1087' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.partial_cmp' class="method"><span id='partial_cmp.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../../std/cmp/trait.PartialOrd.html#tymethod.partial_cmp' class='fnname'>partial_cmp</a>(&amp;self, other: &amp;<a class="union" href="../../std/mem/union.ManuallyDrop.html" title="union std::mem::ManuallyDrop">ManuallyDrop</a>&lt;T&gt;) -&gt; <a class="enum" href="../../std/option/enum.Option.html" title="enum std::option::Option">Option</a>&lt;<a class="enum" href="../../std/cmp/enum.Ordering.html" title="enum std::cmp::Ordering">Ordering</a>&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/core/mem.rs.html#1068-1070' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>This method returns an ordering between <code>self</code> and <code>other</code> values if one exists. <a href="../../std/cmp/trait.PartialOrd.html#tymethod.partial_cmp">Read more</a></p>
</div><h4 id='method.lt' class="method"><span id='lt.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../../std/cmp/trait.PartialOrd.html#method.lt' class='fnname'>lt</a>(&amp;self, other: &amp;<a class="union" href="../../std/mem/union.ManuallyDrop.html" title="union std::mem::ManuallyDrop">ManuallyDrop</a>&lt;T&gt;) -&gt; <a class="primitive" href="../primitive.bool.html">bool</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/core/mem.rs.html#1072-1074' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>This method tests less than (for <code>self</code> and <code>other</code>) and is used by the <code>&lt;</code> operator. <a href="../../std/cmp/trait.PartialOrd.html#method.lt">Read more</a></p>
</div><h4 id='method.le' class="method"><span id='le.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../../std/cmp/trait.PartialOrd.html#method.le' class='fnname'>le</a>(&amp;self, other: &amp;<a class="union" href="../../std/mem/union.ManuallyDrop.html" title="union std::mem::ManuallyDrop">ManuallyDrop</a>&lt;T&gt;) -&gt; <a class="primitive" href="../primitive.bool.html">bool</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/core/mem.rs.html#1076-1078' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>This method tests less than or equal to (for <code>self</code> and <code>other</code>) and is used by the <code>&lt;=</code> operator. <a href="../../std/cmp/trait.PartialOrd.html#method.le">Read more</a></p>
</div><h4 id='method.gt' class="method"><span id='gt.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../../std/cmp/trait.PartialOrd.html#method.gt' class='fnname'>gt</a>(&amp;self, other: &amp;<a class="union" href="../../std/mem/union.ManuallyDrop.html" title="union std::mem::ManuallyDrop">ManuallyDrop</a>&lt;T&gt;) -&gt; <a class="primitive" href="../primitive.bool.html">bool</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/core/mem.rs.html#1080-1082' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>This method tests greater than (for <code>self</code> and <code>other</code>) and is used by the <code>&gt;</code> operator. <a href="../../std/cmp/trait.PartialOrd.html#method.gt">Read more</a></p>
</div><h4 id='method.ge' class="method"><span id='ge.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../../std/cmp/trait.PartialOrd.html#method.ge' class='fnname'>ge</a>(&amp;self, other: &amp;<a class="union" href="../../std/mem/union.ManuallyDrop.html" title="union std::mem::ManuallyDrop">ManuallyDrop</a>&lt;T&gt;) -&gt; <a class="primitive" href="../primitive.bool.html">bool</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/core/mem.rs.html#1084-1086' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>This method tests greater than or equal to (for <code>self</code> and <code>other</code>) and is used by the <code>&gt;=</code> operator. <a href="../../std/cmp/trait.PartialOrd.html#method.ge">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&lt;T&gt; <a class="trait" href="../../std/fmt/trait.Debug.html" title="trait std::fmt::Debug">Debug</a> for <a class="union" href="../../std/mem/union.ManuallyDrop.html" title="union std::mem::ManuallyDrop">ManuallyDrop</a>&lt;T&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;T: <a class="trait" href="../../std/fmt/trait.Debug.html" title="trait std::fmt::Debug">Debug</a>,&nbsp;</span></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/core/mem.rs.html#1026-1032' 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>(&amp;self, fmt: &amp;mut <a class="struct" href="../../std/fmt/struct.Formatter.html" title="struct std::fmt::Formatter">Formatter</a>) -&gt; <a class="enum" href="../../std/result/enum.Result.html" title="enum std::result::Result">Result</a>&lt;<a class="primitive" href="../primitive.unit.html">()</a>, <a class="struct" href="../../std/fmt/struct.Error.html" title="struct std::fmt::Error">Error</a>&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/core/mem.rs.html#1027-1031' 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-Deref' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl&lt;T&gt; <a class="trait" href="../../std/ops/trait.Deref.html" title="trait std::ops::Deref">Deref</a> for <a class="union" href="../../std/mem/union.ManuallyDrop.html" title="union std::mem::ManuallyDrop">ManuallyDrop</a>&lt;T&gt;</code><a href='#impl-Deref' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/core/mem.rs.html#1005-1013' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='associatedtype.Target' class="type"><span id='Target.t' class='invisible'><code>type <a href='../../std/ops/trait.Deref.html#associatedtype.Target' class="type">Target</a> = T</code></span></h4>
<div class='docblock'><p>The resulting type after dereferencing.</p>
</div><h4 id='method.deref' class="method"><span id='deref.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../../std/ops/trait.Deref.html#tymethod.deref' class='fnname'>deref</a>(&amp;self) -&gt; &amp;&lt;<a class="union" href="../../std/mem/union.ManuallyDrop.html" title="union std::mem::ManuallyDrop">ManuallyDrop</a>&lt;T&gt; as <a class="trait" href="../../std/ops/trait.Deref.html" title="trait std::ops::Deref">Deref</a>&gt;::<a class="type" href="../../std/ops/trait.Deref.html#associatedtype.Target" title="type std::ops::Deref::Target">Target</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/core/mem.rs.html#1008-1012' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Dereferences the value.</p>
</div></div><h3 id='impl-DerefMut' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl&lt;T&gt; <a class="trait" href="../../std/ops/trait.DerefMut.html" title="trait std::ops::DerefMut">DerefMut</a> for <a class="union" href="../../std/mem/union.ManuallyDrop.html" title="union std::mem::ManuallyDrop">ManuallyDrop</a>&lt;T&gt;</code><a href='#impl-DerefMut' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/core/mem.rs.html#1016-1023' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.deref_mut' class="method"><span id='deref_mut.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../../std/ops/trait.DerefMut.html#tymethod.deref_mut' class='fnname'>deref_mut</a>(&amp;mut self) -&gt; &amp;mut &lt;<a class="union" href="../../std/mem/union.ManuallyDrop.html" title="union std::mem::ManuallyDrop">ManuallyDrop</a>&lt;T&gt; as <a class="trait" href="../../std/ops/trait.Deref.html" title="trait std::ops::Deref">Deref</a>&gt;::<a class="type" href="../../std/ops/trait.Deref.html#associatedtype.Target" title="type std::ops::Deref::Target">Target</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/core/mem.rs.html#1018-1022' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Mutably dereferences the value.</p>
</div></div><h3 id='impl-Hash' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl&lt;T&gt; <a class="trait" href="../../std/hash/trait.Hash.html" title="trait std::hash::Hash">Hash</a> for <a class="union" href="../../std/mem/union.ManuallyDrop.html" title="union std::mem::ManuallyDrop">ManuallyDrop</a>&lt;T&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;T: <a class="trait" href="../../std/hash/trait.Hash.html" title="trait std::hash::Hash">Hash</a>,&nbsp;</span></code><a href='#impl-Hash' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.22.0'>1.22.0</div><a class='srclink' href='../../src/core/mem.rs.html#1097-1101' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.hash' class="method"><span id='hash.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../../std/hash/trait.Hash.html#tymethod.hash' class='fnname'>hash</a>&lt;H&gt;(&amp;self, state: <a class="primitive" href="../primitive.reference.html">&amp;mut </a>H) <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;H: <a class="trait" href="../../std/hash/trait.Hasher.html" title="trait std::hash::Hasher">Hasher</a>,&nbsp;</span></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/core/mem.rs.html#1098-1100' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Feeds this value into the given [<code>Hasher</code>]. <a href="../../std/hash/trait.Hash.html#tymethod.hash">Read more</a></p>
</div><h4 id='method.hash_slice' class="method"><span id='hash_slice.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../../std/hash/trait.Hash.html#method.hash_slice' class='fnname'>hash_slice</a>&lt;H&gt;(data: <a class="primitive" href="../primitive.slice.html">&amp;[Self]</a>, state: <a class="primitive" href="../primitive.reference.html">&amp;mut </a>H) <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;H: <a class="trait" href="../../std/hash/trait.Hasher.html" title="trait std::hash::Hasher">Hasher</a>,&nbsp;</span></code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.3.0'>1.3.0</div><a class='srclink' href='../../src/core/hash/mod.rs.html#203-209' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Feeds a slice of this type into the given [<code>Hasher</code>]. <a href="../../std/hash/trait.Hash.html#method.hash_slice">Read more</a></p>
</div></div><h3 id='impl-Eq' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl&lt;T&gt; <a class="trait" href="../../std/cmp/trait.Eq.html" title="trait std::cmp::Eq">Eq</a> for <a class="union" href="../../std/mem/union.ManuallyDrop.html" title="union std::mem::ManuallyDrop">ManuallyDrop</a>&lt;T&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;T: <a class="trait" href="../../std/cmp/trait.Eq.html" title="trait std::cmp::Eq">Eq</a>,&nbsp;</span></code><a href='#impl-Eq' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.22.0'>1.22.0</div><a class='srclink' href='../../src/core/mem.rs.html#1064' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'></div><h3 id='impl-Clone' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl&lt;T&gt; <a class="trait" href="../../std/clone/trait.Clone.html" title="trait std::clone::Clone">Clone</a> for <a class="union" href="../../std/mem/union.ManuallyDrop.html" title="union std::mem::ManuallyDrop">ManuallyDrop</a>&lt;T&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;T: <a class="trait" href="../../std/clone/trait.Clone.html" title="trait std::clone::Clone">Clone</a>,&nbsp;</span></code><a href='#impl-Clone' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.22.0'>1.22.0</div><a class='srclink' href='../../src/core/mem.rs.html#1035-1043' 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>(&amp;self) -&gt; <a class="union" href="../../std/mem/union.ManuallyDrop.html" title="union std::mem::ManuallyDrop">ManuallyDrop</a>&lt;T&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/core/mem.rs.html#1036-1038' 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>(&amp;mut self, source: &amp;<a class="union" href="../../std/mem/union.ManuallyDrop.html" title="union std::mem::ManuallyDrop">ManuallyDrop</a>&lt;T&gt;)</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/core/mem.rs.html#1040-1042' 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-Copy' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl&lt;T&gt; <a class="trait" href="../../std/marker/trait.Copy.html" title="trait std::marker::Copy">Copy</a> for <a class="union" href="../../std/mem/union.ManuallyDrop.html" title="union std::mem::ManuallyDrop">ManuallyDrop</a>&lt;T&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;T: <a class="trait" href="../../std/marker/trait.Copy.html" title="trait std::marker::Copy">Copy</a>,&nbsp;</span></code><a href='#impl-Copy' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/core/mem.rs.html#954' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'></div><h3 id='impl-Default' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl&lt;T&gt; <a class="trait" href="../../std/default/trait.Default.html" title="trait std::default::Default">Default</a> for <a class="union" href="../../std/mem/union.ManuallyDrop.html" title="union std::mem::ManuallyDrop">ManuallyDrop</a>&lt;T&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;T: <a class="trait" href="../../std/default/trait.Default.html" title="trait std::default::Default">Default</a>,&nbsp;</span></code><a href='#impl-Default' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.22.0'>1.22.0</div><a class='srclink' href='../../src/core/mem.rs.html#1046-1050' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.default' class="method"><span id='default.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../../std/default/trait.Default.html#tymethod.default' class='fnname'>default</a>() -&gt; <a class="union" href="../../std/mem/union.ManuallyDrop.html" title="union std::mem::ManuallyDrop">ManuallyDrop</a>&lt;T&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/core/mem.rs.html#1047-1049' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns the &quot;default value&quot; for a type. <a href="../../std/default/trait.Default.html#tymethod.default">Read more</a></p>
</div></div></div>
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                  Auto Trait Implementations<a href='#synthetic-implementations' class='anchor'></a>
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                <div id='synthetic-implementations-list'>
            <h3 id='impl-Send' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl&lt;T&gt; <a class="trait" href="../../std/marker/trait.Send.html" title="trait std::marker::Send">Send</a> for <a class="union" href="../../std/mem/union.ManuallyDrop.html" title="union std::mem::ManuallyDrop">ManuallyDrop</a>&lt;T&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;T: <a class="trait" href="../../std/marker/trait.Send.html" title="trait std::marker::Send">Send</a>,&nbsp;</span></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&lt;T&gt; <a class="trait" href="../../std/marker/trait.Sync.html" title="trait std::marker::Sync">Sync</a> for <a class="union" href="../../std/mem/union.ManuallyDrop.html" title="union std::mem::ManuallyDrop">ManuallyDrop</a>&lt;T&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;T: <a class="trait" href="../../std/marker/trait.Sync.html" title="trait std::marker::Sync">Sync</a>,&nbsp;</span></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>&#9166;</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>