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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::</span>unordered_set</h1>
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<div id="contentSub"><span class="subpages">&lt; <a href="cpp.html">cpp</a>&lrm; | <a href="cpp-container.html">container</a></span></div>
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<div>&#23450;&#20041;&#20110;&#22836;&#25991;&#20214; <code><a href="cpp-header-unordered_set.html">&lt;unordered_set&gt;</a></code></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1">&lt;</span><br /></span>
<p>&nbsp; &nbsp; <span class="kw1">class</span> Key,<br />
&nbsp; &nbsp; <span class="kw1">class</span> Hash <span class="sy1">=</span> <a href="cpp-utility-hash.html"><span class="kw1124">std::<span class="me2">hash</span></span></a><span class="sy1">&lt;</span>Key<span class="sy1">&gt;</span>,<br />
&nbsp; &nbsp; <span class="kw1">class</span> KeyEqual <span class="sy1">=</span> <a href="cpp-utility-functional-equal_to.html"><span class="kw1035">std::<span class="me2">equal_to</span></span></a><span class="sy1">&lt;</span>Key<span class="sy1">&gt;</span>,<br />
&nbsp; &nbsp; <span class="kw1">class</span> Allocator <span class="sy1">=</span> <a href="cpp-memory-allocator.html"><span class="kw700">std::<span class="me2">allocator</span></span></a><span class="sy1">&lt;</span>Key<span class="sy1">&gt;</span><br /></p>
<span class="sy1">&gt;</span> <span class="kw1">class</span> unordered_set<span class="sy4">;</span></div>
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<td>(1)</td>
<td><span class="t-mark-rev t-since-cxx11">(C++11 &#36215;)</span></td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">namespace</span> pmr <span class="br0">{</span><br /></span>
<p>&nbsp; &nbsp; <span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> Key,<br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <span class="kw1">class</span> Hash <span class="sy1">=</span> <a href="cpp-utility-hash.html"><span class="kw1124">std::<span class="me2">hash</span></span></a><span class="sy1">&lt;</span>Key<span class="sy1">&gt;</span>,<br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <span class="kw1">class</span> Pred <span class="sy1">=</span> <a href="cpp-utility-functional-equal_to.html"><span class="kw1035">std::<span class="me2">equal_to</span></span></a><span class="sy1">&lt;</span>Key<span class="sy1">&gt;&gt;</span><br />
&nbsp; &nbsp; <span class="kw1">using</span> unordered_set <span class="sy1">=</span> std<span class="sy4">::</span><span class="me2">unordered_set</span><span class="sy1">&lt;</span>Key, Hash, Pred,<br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<a href="cpp-memory-polymorphic_allocator.html"><span class="kw707">std::<span class="me2">pmr</span><span class="sy4">::</span><span class="me2">polymorphic_allocator</span></span></a><span class="sy1">&lt;</span>Key<span class="sy1">&gt;&gt;</span><span class="sy4">;</span><br /></p>
<span class="br0">}</span></div>
</td>
<td>(2)</td>
<td><span class="t-mark-rev t-since-cxx17">(C++17 &#36215;)</span></td>
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<p>unordered_set &#26159;&#21547;&#26377; Key &#31867;&#22411;&#21807;&#19968;&#23545;&#35937;&#38598;&#21512;&#30340;&#20851;&#32852;&#23481;&#22120;&#12290;&#25628;&#32034;&#12289;&#25554;&#20837;&#21644;&#31227;&#38500;&#25317;&#26377;&#24179;&#22343;&#24120;&#25968;&#26102;&#38388;&#22797;&#26434;&#24230;&#12290;</p>
<p>&#22312;&#20869;&#37096;&#65292;&#20803;&#32032;&#24182;&#19981;&#20197;&#20219;&#20309;&#29305;&#21035;&#39034;&#24207;&#25490;&#24207;&#65292;&#32780;&#26159;&#32452;&#32455;&#36827;&#26742;&#20013;&#12290;&#20803;&#32032;&#34987;&#25918;&#36827;&#21738;&#20010;&#26742;&#23436;&#20840;&#20381;&#36182;&#20854;&#20540;&#30340;&#21704;&#24076;&#12290;&#36825;&#20801;&#35768;&#23545;&#21333;&#29420;&#20803;&#32032;&#30340;&#24555;&#36895;&#35775;&#38382;&#65292;&#22240;&#20026;&#21704;&#24076;&#19968;&#26086;&#30830;&#23450;&#65292;&#23601;&#20934;&#30830;&#25351;&#20195;&#20803;&#32032;&#34987;&#25918;&#20837;&#30340;&#26742;&#12290;</p>
<p>&#19981;&#21487;&#20462;&#25913;&#23481;&#22120;&#20803;&#32032;&#65288;&#21363;&#20351;&#36890;&#36807;&#38750; const &#36845;&#20195;&#22120;&#65289;&#65292;&#22240;&#20026;&#20462;&#25913;&#21487;&#33021;&#26356;&#25913;&#20803;&#32032;&#30340;&#21704;&#24076;&#65292;&#24182;&#30772;&#22351;&#23481;&#22120;&#12290;</p>
<p><code>std::unordered_set</code> &#28385;&#36275;<a href="cpp-named_req-Container.html"><span style="font-style:italic">&#23481;&#22120;</span> <span style="font-family: Georgia, &#39;DejaVu Serif&#39;, serif; font-style:italic">(Container)</span></a> &#12289;<a href="cpp-named_req-AllocatorAwareContainer.html"><span style="font-style:italic">&#30693;&#20998;&#37197;&#22120;&#23481;&#22120;</span> <span style="font-family: Georgia, &#39;DejaVu Serif&#39;, serif; font-style:italic">(AllocatorAwareContainer)</span></a> &#12289;<a href="cpp-named_req-UnorderedAssociativeContainer.html"><span style="font-style:italic">&#26080;&#24207;&#20851;&#32852;&#23481;&#22120;</span> <span style="font-family: Georgia, &#39;DejaVu Serif&#39;, serif; font-style:italic">(UnorderedAssociativeContainer)</span></a> &#30340;&#35201;&#27714;&#12290;</p>
<h3><span class="mw-headline" id=".E6.88.90.E5.91.98.E7.B1.BB.E5.9E.8B">&#25104;&#21592;&#31867;&#22411;</span></h3>
<table class="t-dsc-begin">
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<td>&#25104;&#21592;&#31867;&#22411;</td>
<td>&#23450;&#20041;</td>
</tr>
<tr class="t-dsc">
<td><code>key_type</code></td>
<td><code>Key</code></td>
</tr>
<tr class="t-dsc">
<td><code>value_type</code></td>
<td><code>Key</code></td>
</tr>
<tr class="t-dsc">
<td><code>size_type</code></td>
<td>&#26080;&#31526;&#21495;&#25972;&#25968;&#31867;&#22411;&#65288;&#36890;&#24120;&#26159; <span class="t-lc"><a href="cpp-types-size_t.html">std::size_t</a></span> &#65289;</td>
</tr>
<tr class="t-dsc">
<td><code>difference_type</code></td>
<td>&#26377;&#31526;&#21495;&#25972;&#25968;&#31867;&#22411;&#65288;&#36890;&#24120;&#26159; <span class="t-lc"><a href="cpp-types-ptrdiff_t.html">std::ptrdiff_t</a></span> &#65289;</td>
</tr>
<tr class="t-dsc">
<td><code>hasher</code></td>
<td><code>Hash</code></td>
</tr>
<tr class="t-dsc">
<td><code>key_equal</code></td>
<td><code>KeyEqual</code></td>
</tr>
<tr class="t-dsc">
<td><code>allocator_type</code></td>
<td><code>Allocator</code></td>
</tr>
<tr class="t-dsc">
<td><code>reference</code></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">value_type<span class="sy3">&amp;</span></span></span></td>
</tr>
<tr class="t-dsc">
<td><code>const_reference</code></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">const</span> value_type<span class="sy3">&amp;</span></span></span></td>
</tr>
<tr class="t-dsc">
<td><code>pointer</code></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-memory-allocator_traits.html"><span class="kw701">std::<span class="me2">allocator_traits</span></span></a><span class="sy1">&lt;</span>Allocator<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">pointer</span></span></span></td>
</tr>
<tr class="t-dsc">
<td><code>const_pointer</code></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-memory-allocator_traits.html"><span class="kw701">std::<span class="me2">allocator_traits</span></span></a><span class="sy1">&lt;</span>Allocator<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">const_pointer</span></span></span></td>
</tr>
<tr class="t-dsc">
<td><code>iterator</code></td>
<td>&#25351;&#21521; <code>value_type</code> &#30340;&#24120;<a href="cpp-named_req-ForwardIterator.html"><span style="font-style:italic">&#32769;&#24335;&#21521;&#21069;&#36845;&#20195;&#22120;</span> <span style="font-family: Georgia, &#39;DejaVu Serif&#39;, serif; font-style:italic">(LegacyForwardIterator)</span></a></td>
</tr>
<tr class="t-dsc">
<td><code>const_iterator</code></td>
<td>&#25351;&#21521; <code>const value_type</code> &#30340;<a href="cpp-named_req-ForwardIterator.html"><span style="font-style:italic">&#32769;&#24335;&#21521;&#21069;&#36845;&#20195;&#22120;</span> <span style="font-family: Georgia, &#39;DejaVu Serif&#39;, serif; font-style:italic">(LegacyForwardIterator)</span></a></td>
</tr>
<tr class="t-dsc">
<td><code>local_iterator</code></td>
<td>&#31867;&#21035;&#12289;&#20540;&#12289;&#24046;&#12289;&#25351;&#38024;&#21644;&#24341;&#29992;&#31867;&#22411;&#37117;&#19982; <code>iterator</code> &#30456;&#21516;&#30340;&#36845;&#20195;&#22120;&#31867;&#22411;&#12290;<br />
&#33021;&#29992;&#27492;&#36845;&#20195;&#22120;&#22312;&#21333;&#20010;&#26742;&#36845;&#20195;&#65292;&#20294;&#19981;&#33021;&#36328;&#26742;&#12290;</td>
</tr>
<tr class="t-dsc">
<td><code>const_local_iterator</code></td>
<td>&#31867;&#21035;&#12289;&#20540;&#12289;&#24046;&#12289;&#25351;&#38024;&#21644;&#24341;&#29992;&#31867;&#22411;&#37117;&#19982; <code>const_iterator</code> &#30456;&#21516;&#30340;&#36845;&#20195;&#22120;&#31867;&#22411;&#12290;<br />
&#33021;&#29992;&#27492;&#36845;&#20195;&#22120;&#22312;&#21333;&#20010;&#26742;&#36845;&#20195;&#65292;&#20294;&#19981;&#33021;&#36328;&#26742;&#12290;</td>
</tr>
<tr class="t-dsc">
<td><code>node_type</code><span class="t-mark-rev t-since-cxx17">(C++17 &#36215;)</span></td>
<td>&#34920;&#31034;&#23481;&#22120;&#32467;&#28857;&#30340;<a href="cpp-container-node_handle.html">&#32467;&#28857;&#25226;&#26564;</a>&#29305;&#21270;</td>
</tr>
<tr class="t-dsc">
<td><code>insert_return_type</code><span class="t-mark-rev t-since-cxx17">(C++17 &#36215;)</span></td>
<td>&#25551;&#36848;&#25554;&#20837; <code>node_type</code> &#32467;&#26524;&#30340;&#31867;&#22411;&#65292;&#19979;&#21015;&#31867;&#22411;&#30340;&#29305;&#21270;
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="cpp source-cpp">
<pre class="de1"><span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> Iter, <span class="kw1">class</span> NodeType<span class="sy1">&gt;</span> <span class="kw1">struct</span> <span class="coMULTI">/*unspecified*/</span> <span class="br0">{</span>
Iter position<span class="sy4">;</span>
<span class="kw4">bool</span> inserted<span class="sy4">;</span>
NodeType node<span class="sy4">;</span>
<span class="br0">}</span><span class="sy4">;</span></pre></div>
</div>
&#65292;&#20197;&#27169;&#26495;&#23454;&#21442; <code>iterator</code> &#21644; <code>node_type</code> &#23454;&#20363;&#21270;&#12290;</td>
</tr>
</table>
<h3><span class="mw-headline" id=".E6.88.90.E5.91.98.E5.87.BD.E6.95.B0">&#25104;&#21592;&#20989;&#25968;</span></h3>
<table class="t-dsc-begin">
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<td>
<div class="t-dsc-member-div t-dsc-member-nobold-div">
<div><a href="cpp-container-unordered_set-unordered_set.html"><span class="t-lines"><span>(&#26500;&#36896;&#20989;&#25968;)</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
</div>
</td>
<td>&#26500;&#36896; <code>unordered_set</code><br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div t-dsc-member-nobold-div">
<div><a href="cpp-container-unordered_set-~unordered_set.html"><span class="t-lines"><span>(&#26512;&#26500;&#20989;&#25968;)</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
</div>
</td>
<td>&#26512;&#26500; <code>unordered_set</code><br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-container-unordered_set-operator=.html"><span class="t-lines"><span>operator=</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
</div>
</td>
<td>&#36171;&#20540;&#32473;&#23481;&#22120;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-container-unordered_set-get_allocator.html"><span class="t-lines"><span>get_allocator</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
</div>
</td>
<td>&#36820;&#22238;&#30456;&#20851;&#30340;&#20998;&#37197;&#22120;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr>
<td colspan="2">
<h5><span class="mw-headline" id=".E8.BF.AD.E4.BB.A3.E5.99.A8">&#36845;&#20195;&#22120;</span></h5>
</td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-container-unordered_set-begin.html"><span class="t-lines"><span>begin</span> <span>cbegin</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
</div>
</td>
<td>&#36820;&#22238;&#25351;&#21521;&#36215;&#22987;&#30340;&#36845;&#20195;&#22120;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-container-unordered_set-end.html"><span class="t-lines"><span>end</span> <span>cend</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
</div>
</td>
<td>&#36820;&#22238;&#25351;&#21521;&#26411;&#23614;&#30340;&#36845;&#20195;&#22120;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr>
<td colspan="2">
<h5><span class="mw-headline" id=".E5.AE.B9.E9.87.8F">&#23481;&#37327;</span></h5>
</td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-container-unordered_set-empty.html"><span class="t-lines"><span>empty</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
</div>
</td>
<td>&#26816;&#26597;&#23481;&#22120;&#26159;&#21542;&#20026;&#31354;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-container-unordered_set-size.html"><span class="t-lines"><span>size</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
</div>
</td>
<td>&#36820;&#22238;&#23481;&#32435;&#30340;&#20803;&#32032;&#25968;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-container-unordered_set-max_size.html"><span class="t-lines"><span>max_size</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
</div>
</td>
<td>&#36820;&#22238;&#21487;&#23481;&#32435;&#30340;&#26368;&#22823;&#20803;&#32032;&#25968;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr>
<td colspan="2">
<h5><span class="mw-headline" id=".E4.BF.AE.E6.94.B9.E5.99.A8">&#20462;&#25913;&#22120;</span></h5>
</td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-container-unordered_set-clear.html"><span class="t-lines"><span>clear</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
</div>
</td>
<td>&#28165;&#38500;&#20869;&#23481;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-container-unordered_set-insert.html"><span class="t-lines"><span>insert</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
</div>
</td>
<td>&#25554;&#20837;&#20803;&#32032;<span class="t-rev-inl t-since-cxx17"><span>&#25110;&#32467;&#28857;</span> <span><span class="t-mark-rev t-since-cxx17">(C++17 &#36215;)</span></span></span><br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-container-unordered_set-emplace.html"><span class="t-lines"><span>emplace</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
</div>
</td>
<td>&#21407;&#20301;&#26500;&#36896;&#20803;&#32032;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-container-unordered_set-emplace_hint.html"><span class="t-lines"><span>emplace_hint</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
</div>
</td>
<td>&#20351;&#29992;&#25552;&#31034;&#21407;&#20301;&#26500;&#36896;&#20803;&#32032;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-container-unordered_set-erase.html"><span class="t-lines"><span>erase</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
</div>
</td>
<td>&#25830;&#38500;&#20803;&#32032;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-container-unordered_set-swap.html"><span class="t-lines"><span>swap</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
</div>
</td>
<td>&#20132;&#25442;&#20869;&#23481;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-container-unordered_set-extract.html"><span class="t-lines"><span>extract</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
</div>
</td>
<td>&#20174;&#21478;&#19968;&#23481;&#22120;&#37322;&#20986;&#32467;&#28857;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-container-unordered_set-merge.html"><span class="t-lines"><span>merge</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
</div>
</td>
<td>&#20174;&#21478;&#19968;&#23481;&#22120;&#25509;&#21512;&#32467;&#28857;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr>
<td colspan="2">
<h5><span class="mw-headline" id=".E6.9F.A5.E6.89.BE">&#26597;&#25214;</span></h5>
</td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-container-unordered_set-count.html"><span class="t-lines"><span>count</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
</div>
</td>
<td>&#36820;&#22238;&#21305;&#37197;&#29305;&#23450;&#38190;&#30340;&#20803;&#32032;&#25968;&#37327;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-container-unordered_set-find.html"><span class="t-lines"><span>find</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
</div>
</td>
<td>&#23547;&#25214;&#24102;&#26377;&#29305;&#23450;&#38190;&#30340;&#20803;&#32032;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-container-unordered_set-contains.html"><span class="t-lines"><span>contains</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
</div>
</td>
<td>&#26816;&#26597;&#23481;&#22120;&#26159;&#21542;&#21547;&#26377;&#24102;&#29305;&#23450;&#38190;&#30340;&#20803;&#32032;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-container-unordered_set-equal_range.html"><span class="t-lines"><span>equal_range</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
</div>
</td>
<td>&#36820;&#22238;&#21305;&#37197;&#29305;&#23450;&#38190;&#30340;&#20803;&#32032;&#33539;&#22260;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr>
<td colspan="2">
<h5><span class="mw-headline" id=".E6.A1.B6.E6.8E.A5.E5.8F.A3">&#26742;&#25509;&#21475;</span></h5>
</td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-container-unordered_set-begin2.html"><span class="t-lines"><span>begin<span class="t-dsc-small">(size_type)</span></span> <span>cbegin<span class="t-dsc-small">(size_type)</span></span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
</div>
</td>
<td>&#36820;&#22238;&#19968;&#20010;&#36845;&#20195;&#22120;&#65292;&#25351;&#21521;&#25351;&#23450;&#30340;&#26742;&#30340;&#24320;&#22987;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-container-unordered_set-end2.html"><span class="t-lines"><span>end<span class="t-dsc-small">(size_type)</span></span> <span>cend<span class="t-dsc-small">(size_type)</span></span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
</div>
</td>
<td>&#36820;&#22238;&#19968;&#20010;&#36845;&#20195;&#22120;&#65292;&#25351;&#21521;&#25351;&#23450;&#30340;&#26742;&#30340;&#26411;&#23614;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-container-unordered_set-bucket_count.html"><span class="t-lines"><span>bucket_count</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
</div>
</td>
<td>&#36820;&#22238;&#26742;&#25968;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-container-unordered_set-max_bucket_count.html"><span class="t-lines"><span>max_bucket_count</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
</div>
</td>
<td>&#36820;&#22238;&#26742;&#30340;&#26368;&#22823;&#25968;&#37327;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-container-unordered_set-bucket_size.html"><span class="t-lines"><span>bucket_size</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
</div>
</td>
<td>&#36820;&#22238;&#22312;&#29305;&#23450;&#30340;&#26742;&#20013;&#30340;&#20803;&#32032;&#25968;&#37327;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-container-unordered_set-bucket.html"><span class="t-lines"><span>bucket</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
</div>
</td>
<td>&#36820;&#22238;&#24102;&#26377;&#29305;&#23450;&#38190;&#30340;&#26742;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr>
<td colspan="2">
<h5><span class="mw-headline" id=".E5.93.88.E5.B8.8C.E7.AD.96.E7.95.A5">&#21704;&#24076;&#31574;&#30053;</span></h5>
</td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-container-unordered_set-load_factor.html"><span class="t-lines"><span>load_factor</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
</div>
</td>
<td>&#36820;&#22238;&#27599;&#20010;&#26742;&#30340;&#24179;&#22343;&#20803;&#32032;&#25968;&#37327;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-container-unordered_set-max_load_factor.html"><span class="t-lines"><span>max_load_factor</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
</div>
</td>
<td>&#31649;&#29702;&#27599;&#20010;&#26742;&#30340;&#24179;&#22343;&#20803;&#32032;&#25968;&#37327;&#30340;&#26368;&#22823;&#20540;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-container-unordered_set-rehash.html"><span class="t-lines"><span>rehash</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
</div>
</td>
<td>&#20026;&#33267;&#23569;&#20026;&#25351;&#23450;&#25968;&#37327;&#30340;&#26742;&#39044;&#30041;&#23384;&#20648;&#31354;&#38388;&#24182;&#37325;&#26032;&#29983;&#25104;&#25955;&#21015;&#34920;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-container-unordered_set-reserve.html"><span class="t-lines"><span>reserve</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
</div>
</td>
<td>&#20026;&#33267;&#23569;&#20026;&#25351;&#23450;&#25968;&#37327;&#30340;&#20803;&#32032;&#39044;&#30041;&#23384;&#20648;&#31354;&#38388;&#24182;&#37325;&#26032;&#29983;&#25104;&#21704;&#24076;&#34920;&#12290;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr>
<td colspan="2">
<h5><span class="mw-headline" id=".E8.A7.82.E5.AF.9F.E5.99.A8">&#35266;&#23519;&#22120;</span></h5>
</td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-container-unordered_set-hash_function.html"><span class="t-lines"><span>hash_function</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
</div>
</td>
<td>&#36820;&#22238;&#29992;&#20110;&#23545;&#38190;&#25955;&#21015;&#30340;&#20989;&#25968;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-container-unordered_set-key_eq.html"><span class="t-lines"><span>key_eq</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
</div>
</td>
<td>&#36820;&#22238;&#29992;&#20110;&#27604;&#36739;&#38190;&#30340;&#30456;&#31561;&#24615;&#30340;&#20989;&#25968;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
</table>
<h3><span class="mw-headline" id=".E9.9D.9E.E6.88.90.E5.91.98.E5.87.BD.E6.95.B0">&#38750;&#25104;&#21592;&#20989;&#25968;</span></h3>
<table class="t-dsc-begin">
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-container-unordered_set-operator_cmp.html"><span class="t-lines"><span>operator==</span><span>operator!=</span></span></a></div>
<div><span class="t-lines"><span></span><span><span class="t-mark-rev t-until-cxx20">(C++20 &#20013;&#31227;&#38500;)</span></span></span></div>
</div>
</td>
<td>&#27604;&#36739; unordered_set &#20013;&#30340;&#20540;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-container-unordered_set-swap2.html"><span class="t-lines"><span>std::swap<span class="t-dsc-small">(std::unordered_set)</span></span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
</div>
</td>
<td>&#29305;&#21270; <span class="t-lc"><a href="cpp-algorithm-swap.html">std::swap</a></span> &#31639;&#27861;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-container-unordered_set-erase_if.html"><span class="t-lines"><span>erase_if<span class="t-dsc-small">(std::unordered_set)</span></span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
</div>
</td>
<td>&#25830;&#38500;&#25152;&#26377;&#28385;&#36275;&#29305;&#23450;&#21028;&#21035;&#26631;&#20934;&#30340;&#20803;&#32032;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
</table>
<h3><span class="mw-headline" id=".E6.8E.A8.E5.AF.BC.E6.8C.87.E5.BC.95.28C.2B.2B17_.E8.B5.B7.29"><a href="cpp-container-unordered_set-deduction_guides.html">&#25512;&#23548;&#25351;&#24341;</a><span class="t-mark-rev t-since-cxx17">(C++17 &#36215;)</span></span></h3>
<h3><span class="mw-headline" id=".E6.B3.A8.E6.84.8F">&#27880;&#24847;</span></h3>
<p>&#25104;&#21592;&#31867;&#22411; <code>iterator</code> &#19982; <code>const_iterator</code> &#21487;&#33021;&#26159;&#21516;&#19968;&#31867;&#22411;&#30340;&#21035;&#21517;&#12290;&#36825;&#34920;&#26126;&#20197;&#20108;&#20010;&#31867;&#22411;&#20026;&#21442;&#25968;&#31867;&#22411;&#30340;&#19968;&#23545;&#20989;&#25968;&#37325;&#36733;&#21487;&#33021;&#36829;&#32972;<a href="cpp-language-definition.html#.E5.8D.95.E4.B8.80.E5.AE.9A.E4.B9.89.E8.A7.84.E5.88.99.EF.BC.88ODR.EF.BC.89">&#21333;&#19968;&#23450;&#20041;&#35268;&#21017;</a>&#12290;&#22240;&#20026; <code>iterator</code> &#21487;&#36716;&#25442;&#20026; <code>const_iterator</code> &#65292;&#21333;&#20010;&#20197; <code>const_iterator</code> &#20026;&#21442;&#25968;&#31867;&#22411;&#30340;&#20989;&#25968;&#20250;&#26159;&#26377;&#25928;&#30340;&#12290;</p>
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