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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::</span>swap<small>(std::multimap)</small></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-multimap.html">multimap</a></span></div>
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<div>&#23450;&#20041;&#20110;&#22836;&#25991;&#20214; <code><a href="cpp-header-map.html">&lt;map&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> <span class="kw1">class</span> Key, <span class="kw1">class</span> T, <span class="kw1">class</span> Compare, <span class="kw1">class</span> Alloc <span class="sy1">&gt;</span><br /></span>
<p><span class="kw4">void</span> swap<span class="br0">(</span> <a href="cpp-container-multimap.html"><span class="kw1285">std::<span class="me2">multimap</span></span></a><span class="sy1">&lt;</span>Key,T,Compare,Alloc<span class="sy1">&gt;</span><span class="sy3">&amp;</span> lhs,<br /></p>
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<a href="cpp-container-multimap.html"><span class="kw1285">std::<span class="me2">multimap</span></span></a><span class="sy1">&lt;</span>Key,T,Compare,Alloc<span class="sy1">&gt;</span><span class="sy3">&amp;</span> rhs <span class="br0">)</span><span class="sy4">;</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="kw1">template</span><span class="sy1">&lt;</span> <span class="kw1">class</span> Key, <span class="kw1">class</span> T, <span class="kw1">class</span> Compare, <span class="kw1">class</span> Alloc <span class="sy1">&gt;</span><br /></span>
<p><span class="kw4">void</span> swap<span class="br0">(</span> <a href="cpp-container-multimap.html"><span class="kw1285">std::<span class="me2">multimap</span></span></a><span class="sy1">&lt;</span>Key,T,Compare,Alloc<span class="sy1">&gt;</span><span class="sy3">&amp;</span> lhs,<br /></p>
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<a href="cpp-container-multimap.html"><span class="kw1285">std::<span class="me2">multimap</span></span></a><span class="sy1">&lt;</span>Key,T,Compare,Alloc<span class="sy1">&gt;</span><span class="sy3">&amp;</span> rhs <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></div>
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<td><span class="t-mark-rev t-since-cxx17">(C++17 &#36215;)</span></td>
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<p>&#20026; <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-container-multimap.html"><span class="kw1285">std::<span class="me2">multimap</span></span></a></span></span> &#29305;&#21270; <span class="t-lc"><a href="cpp-algorithm-swap.html">std::swap</a></span> &#31639;&#27861;&#12290;&#20132;&#25442; <code>lhs</code> &#19982; <code>rhs</code> &#30340;&#20869;&#23481;&#12290;&#35843;&#29992; <span class="t-c"><span class="mw-geshi cpp source-cpp">lhs.<span class="me1">swap</span><span class="br0">(</span>rhs<span class="br0">)</span></span></span> &#12290;</p>
<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">&#21442;&#25968;</span></h3>
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<td>lhs, rhs</td>
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<td>&#35201;&#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.A4.8D.E6.9D.82.E5.BA.A6">&#22797;&#26434;&#24230;</span></h3>
<p>&#24120;&#25968;&#12290;</p>
<h3><span class="mw-headline" id=".E5.BC.82.E5.B8.B8">&#24322;&#24120;</span></h3>
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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><span class="kw1">noexcept</span><span class="br0">(</span>lhs.<span class="me1">swap</span><span class="br0">(</span>rhs<span class="br0">)</span><span class="br0">)</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=".E6.B3.A8.E8.A7.A3">&#27880;&#35299;</span></h3>
<p>&#23613;&#31649; <span class="t-lc"><a href="cpp-algorithm-swap.html">std::swap</a></span> &#23545;&#23481;&#22120;&#36866;&#37197;&#22120;&#30340;&#37325;&#36733;&#26159;&#22312; C++11 &#24341;&#20837;&#30340;&#65292; C++98 &#20013;&#24050;&#33021;&#29992; <span class="t-lc"><a href="cpp-algorithm-swap.html">std::swap</a></span> &#20132;&#25442;&#23481;&#22120;&#36866;&#37197;&#22120;&#12290;&#36825;&#31181; <span class="t-lc"><a href="cpp-algorithm-swap.html">std::swap</a></span> &#35843;&#29992;&#36890;&#24120;&#25317;&#26377;&#32447;&#24615;&#26102;&#38388;&#22797;&#26434;&#24230;&#65292;&#20294;&#21487;&#20197;&#25552;&#20379;&#26356;&#22909;&#30340;&#22797;&#26434;&#24230;&#12290;</p>
<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">&#31034;&#20363;</span></h3>
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<pre class="de1"><span class="co2">#include &lt;algorithm&gt;</span>
<span class="co2">#include &lt;iostream&gt;</span>
<span class="co2">#include &lt;map&gt;</span>
<span class="kw4">int</span> main<span class="br0">(</span><span class="br0">)</span>
<span class="br0">{</span>
<a href="cpp-container-multimap.html"><span class="kw1285">std::<span class="me2">multimap</span></span></a><span class="sy1">&lt;</span><span class="kw4">int</span>, <span class="kw4">char</span><span class="sy1">&gt;</span> alice<span class="br0">{</span><span class="br0">{</span><span class="nu0">1</span>, <span class="st0">&#39;a&#39;</span><span class="br0">}</span>, <span class="br0">{</span><span class="nu0">2</span>, <span class="st0">&#39;b&#39;</span><span class="br0">}</span>, <span class="br0">{</span><span class="nu0">3</span>, <span class="st0">&#39;c&#39;</span><span class="br0">}</span><span class="br0">}</span><span class="sy4">;</span>
<a href="cpp-container-multimap.html"><span class="kw1285">std::<span class="me2">multimap</span></span></a><span class="sy1">&lt;</span><span class="kw4">int</span>, <span class="kw4">char</span><span class="sy1">&gt;</span> bob<span class="br0">{</span><span class="br0">{</span><span class="nu0">7</span>, <span class="st0">&#39;Z&#39;</span><span class="br0">}</span>, <span class="br0">{</span><span class="nu0">8</span>, <span class="st0">&#39;Y&#39;</span><span class="br0">}</span>, <span class="br0">{</span><span class="nu0">9</span>, <span class="st0">&#39;X&#39;</span><span class="br0">}</span>, <span class="br0">{</span><span class="nu0">10</span>, <span class="st0">&#39;W&#39;</span><span class="br0">}</span><span class="br0">}</span><span class="sy4">;</span>
<span class="kw4">auto</span> print <span class="sy1">=</span> <span class="br0">[</span><span class="br0">]</span><span class="br0">(</span><a href="cpp-utility-pair.html"><span class="kw1096">std::<span class="me2">pair</span></span></a><span class="sy1">&lt;</span><span class="kw4">const</span> <span class="kw4">int</span>, <span class="kw4">char</span><span class="sy1">&gt;</span><span class="sy3">&amp;</span> n<span class="br0">)</span> <span class="br0">{</span>
<a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <span class="st0">&quot; &quot;</span> <span class="sy1">&lt;&lt;</span> n.<span class="me1">first</span> <span class="sy1">&lt;&lt;</span> <span class="st0">&#39;(&#39;</span> <span class="sy1">&lt;&lt;</span> n.<span class="me1">second</span> <span class="sy1">&lt;&lt;</span> <span class="st0">&#39;)&#39;</span><span class="sy4">;</span>
<span class="br0">}</span><span class="sy4">;</span>
<span class="co1">// &#25171;&#21360;&#20132;&#25442;&#21069;&#30340;&#29366;&#24577;</span>
<a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <span class="st0">&quot;alice:&quot;</span><span class="sy4">;</span>
<a href="cpp-algorithm-for_each.html"><span class="kw1568">std::<span class="me2">for_each</span></span></a><span class="br0">(</span>alice.<span class="me1">begin</span><span class="br0">(</span><span class="br0">)</span>, alice.<span class="me1">end</span><span class="br0">(</span><span class="br0">)</span>, print<span class="br0">)</span><span class="sy4">;</span>
<a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <span class="st0">&#39;<span class="es1">\n</span>&#39;</span><span class="sy4">;</span>
<a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <span class="st0">&quot;bob :&quot;</span><span class="sy4">;</span>
<a href="cpp-algorithm-for_each.html"><span class="kw1568">std::<span class="me2">for_each</span></span></a><span class="br0">(</span>bob.<span class="me1">begin</span><span class="br0">(</span><span class="br0">)</span>, bob.<span class="me1">end</span><span class="br0">(</span><span class="br0">)</span>, print<span class="br0">)</span><span class="sy4">;</span>
<a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <span class="st0">&#39;<span class="es1">\n</span>&#39;</span><span class="sy4">;</span>
<a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <span class="st0">&quot;-- SWAP<span class="es1">\n</span>&quot;</span><span class="sy4">;</span>
<a href="cpp-algorithm-swap.html"><span class="kw1599">std::<span class="me2">swap</span></span></a><span class="br0">(</span>alice,bob<span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// &#25171;&#21360;&#20132;&#25442;&#21518;&#30340;&#29366;&#24577;</span>
<a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <span class="st0">&quot;alice:&quot;</span><span class="sy4">;</span>
<a href="cpp-algorithm-for_each.html"><span class="kw1568">std::<span class="me2">for_each</span></span></a><span class="br0">(</span>alice.<span class="me1">begin</span><span class="br0">(</span><span class="br0">)</span>, alice.<span class="me1">end</span><span class="br0">(</span><span class="br0">)</span>, print<span class="br0">)</span><span class="sy4">;</span>
<a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <span class="st0">&#39;<span class="es1">\n</span>&#39;</span><span class="sy4">;</span>
<a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <span class="st0">&quot;bob :&quot;</span><span class="sy4">;</span>
<a href="cpp-algorithm-for_each.html"><span class="kw1568">std::<span class="me2">for_each</span></span></a><span class="br0">(</span>bob.<span class="me1">begin</span><span class="br0">(</span><span class="br0">)</span>, bob.<span class="me1">end</span><span class="br0">(</span><span class="br0">)</span>, print<span class="br0">)</span><span class="sy4">;</span>
<a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <span class="st0">&#39;<span class="es1">\n</span>&#39;</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div>
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<p>&#36755;&#20986;&#65306;</p>
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<pre class="de1">alice: 1(a) 2(b) 3(c)
bob : 7(Z) 8(Y) 9(X) 10(W)
-- SWAP
alice: 7(Z) 8(Y) 9(X) 10(W)
bob : 1(a) 2(b) 3(c)</pre></div>
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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-multimap-swap.html"><span class="t-lines"><span>swap</span></span></a></div>
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<td>&#20132;&#25442;&#20869;&#23481;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
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