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<title>std::map&lt;Key,T,Compare,Allocator&gt;::swap</title>
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::map&lt;Key,T,Compare,Allocator&gt;::</span>swap</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>&lrm; | <a href="cpp-container-map.html">map</a></span></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">void</span> swap<span class="br0">(</span> map<span class="sy3">&amp;</span> other <span class="br0">)</span><span class="sy4">;</span></span></div>
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<td><span class="t-mark-rev t-until-cxx17">(C++17 &#21069;)</span></td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">void</span> swap<span class="br0">(</span> map<span class="sy3">&amp;</span> other <span class="br0">)</span> <span class="kw1">noexcept</span><span class="br0">(</span><span class="coMULTI">/* see below */</span><span class="br0">)</span><span class="sy4">;</span></span></div>
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<td><span class="t-mark-rev t-since-cxx17">(C++17 &#36215;)</span></td>
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<p>&#23558;&#20869;&#23481;&#19982; <code>other</code> &#30340;&#20132;&#25442;&#12290;&#19981;&#22312;&#21333;&#29420;&#30340;&#20803;&#32032;&#19978;&#35843;&#29992;&#20219;&#20309;&#31227;&#21160;&#12289;&#22797;&#21046;&#25110;&#20132;&#25442;&#25805;&#20316;&#12290;</p>
<p>&#25152;&#26377;&#36845;&#20195;&#22120;&#21644;&#24341;&#29992;&#20445;&#25345;&#21512;&#27861;&#12290;&#23614;&#21518;&#36845;&#20195;&#22120;&#34987;&#38750;&#27861;&#21270;&#12290;</p>
<p><code>Pred</code> &#23545;&#35937;&#24517;&#39035;<a href="cpp-named_req-Swappable.html"><span style="font-style:italic">&#21487;&#20132;&#25442;</span> <span style="font-family: Georgia, &#39;DejaVu Serif&#39;, serif; font-style:italic">(Swappable)</span></a> &#65292;&#24182;&#29992;&#38750;&#25104;&#21592; <code>swap</code> &#30340;&#38750;&#38480;&#23450;&#35843;&#29992;&#20132;&#25442;&#23427;&#20204;&#12290;</p>
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<p>&#33509; <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_type<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">propagate_on_container_swap</span><span class="sy4">::</span><span class="me2">value</span></span></span> &#20026; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw2">true</span></span></span> &#65292;&#21017;&#29992;&#23545;&#38750;&#25104;&#21592; <code>swap</code> &#30340;&#26080;&#38480;&#23450;&#35843;&#29992;&#20132;&#25442;&#20998;&#37197;&#22120;&#12290;&#21542;&#21017;&#65292;&#19981;&#20132;&#25442;&#23427;&#20204;&#65288;&#19988;&#33509; <span class="t-c"><span class="mw-geshi cpp source-cpp">get_allocator<span class="br0">(</span><span class="br0">)</span> <span class="sy3">!</span><span class="sy1">=</span> other.<span class="me1">get_allocator</span><span class="br0">(</span><span class="br0">)</span></span></span> &#65292;&#21017;&#34892;&#20026;&#26410;&#23450;&#20041;&#65289;&#12290;</p>
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<td><span class="t-mark-rev t-since-cxx11">(C++11 &#36215;)</span></td>
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<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">&#21442;&#25968;</span></h3>
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<td>&#35201;&#19982;&#20043;&#20132;&#25442;&#20869;&#23481;&#30340;&#23481;&#22120;</td>
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<h3><span class="mw-headline" id=".E8.BF.94.E5.9B.9E.E5.80.BC">&#36820;&#22238;&#20540;</span></h3>
<p>&#65288;&#26080;&#65289;</p>
<h3><span class="mw-headline" id=".E5.BC.82.E5.B8.B8">&#24322;&#24120;</span></h3>
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<p>&#20219;&#20309; <code>Compare</code> &#23545;&#35937;&#20132;&#25442;&#25152;&#25243;&#30340;&#24322;&#24120;&#12290;</p>
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<div class="t-noexcept-full"><a href="cpp-language-noexcept_spec.html"><tt>noexcept</tt></a> &#35828;&#26126;&#65306;&nbsp;&nbsp;
<div class="t-noexcept-box"><span class="t-cc"><span class="mw-geshi cpp source-cpp"><span class="kw1">noexcept</span><span class="br0">(</span><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">is_always_equal</span><span class="sy4">::</span><span class="me2">value</span><br />
<span class="sy3">&amp;&amp;</span> <a href="cpp-types-is_swappable.html"><span class="kw576">std::<span class="me2">is_nothrow_swappable</span></span></a><span class="sy1">&lt;</span>Compare<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">value</span><span class="br0">)</span></span></span></div>
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<td><span class="t-mark-rev t-since-cxx17">(C++17 &#36215;)</span></td>
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<h3><span class="mw-headline" id=".E5.A4.8D.E6.9D.82.E5.BA.A6">&#22797;&#26434;&#24230;</span></h3>
<p>&#24120;&#25968;&#12290;</p>
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<td class="mbox-text" style="">&#26412;&#33410;&#26410;&#23436;&#25104;<br />
&#21407;&#22240;&#65306;&#26242;&#26080;&#31034;&#20363;</td>
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<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">&#21442;&#38405;</span></h3>
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<div><a href="cpp-container-map-swap2.html"><span class="t-lines"><span>std::swap<span class="t-dsc-small">(std::map)</span></span></span></a></div>
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<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>
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