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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::stack&lt;T,Container&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-stack.html">stack</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> stack<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-cxx11">(C++11 &#36215;)</span></td>
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<p>&#20132;&#25442;&#23481;&#22120;&#36866;&#37197;&#22120;&#19982; <code>other</code> &#30340;&#20869;&#23481;&#12290;&#31561;&#25928;&#22320;&#35843;&#29992; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw1">using</span> <a href="cpp-algorithm-swap.html"><span class="kw1599">std::<span class="me2">swap</span></span></a><span class="sy4">;</span> swap<span class="br0">(</span>c, other.<span class="me1">c</span><span class="br0">)</span><span class="sy4">;</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>other</td>
<td>-</td>
<td>&#35201;&#20132;&#25442;&#20869;&#23481;&#30340;&#23481;&#22120;&#36866;&#37197;&#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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<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>swap<span class="br0">(</span>c, other.<span class="me1">c</span><span class="br0">)</span><span class="br0">)</span><span class="br0">)</span></span></span></div>
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<p>&#19978;&#36848;&#34920;&#36798;&#24335;&#20013;&#65292;&#29992;&#19982; C++17 <span class="t-lc"><a href="cpp-types-is_swappable.html">std::is_nothrow_swappable</a></span> &#29305;&#24615;&#25152;&#29992;&#30340;&#30456;&#21516;&#26041;&#24335;&#26597;&#25214;&#26631;&#35782;&#31526; <code>swap</code> &#12290;</p>
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<td><span class="t-mark-rev t-since-cxx11">(C++11 &#36215;)</span><br />
<span class="t-mark-rev t-until-cxx17">(C++17 &#21069;)</span></td>
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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-types-is_swappable.html"><span class="kw577">std::<span class="me2">is_nothrow_swappable_v</span></span></a><span class="sy1">&lt;</span>Container<span class="sy1">&gt;</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>&#19982;&#24213;&#23618;&#23481;&#22120;&#30456;&#21516;&#65288;&#24120;&#20026;&#24120;&#25968;&#65289;&#12290;</p>
<h3><span class="mw-headline" id=".E6.B3.A8.E8.A7.A3">&#27880;&#35299;</span></h3>
<p>&#19968;&#20123;&#23454;&#29616;&#65288;&#20363;&#22914; libc++ &#65289;&#23545; C++11 &#21069;&#27169;&#24335;&#25552;&#20379; <code>swap</code> &#25104;&#21592;&#20989;&#25968;&#20316;&#20026;&#25193;&#23637;&#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;iostream&gt;</span>
<span class="co2">#include &lt;stack&gt;</span>
<span class="co2">#include &lt;string&gt;</span>
<span class="co2">#include &lt;vector&gt;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">typename</span> Stack<span class="sy1">&gt;</span>
<span class="kw4">void</span> print<span class="br0">(</span>Stack stack <span class="coMULTI">/* pass by value */</span>, <span class="kw4">int</span> id<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;s&quot;</span> <span class="sy1">&lt;&lt;</span> id <span class="sy1">&lt;&lt;</span> <span class="st0">&quot; [&quot;</span> <span class="sy1">&lt;&lt;</span> stack.<span class="me1">size</span><span class="br0">(</span><span class="br0">)</span> <span class="sy1">&lt;&lt;</span> <span class="st0">&quot;]: &quot;</span><span class="sy4">;</span>
<span class="kw1">for</span> <span class="br0">(</span><span class="sy4">;</span> <span class="sy3">!</span>stack.<span class="me1">empty</span><span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span> stack.<span class="me1">pop</span><span class="br0">(</span><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> stack.<span class="me1">top</span><span class="br0">(</span><span class="br0">)</span> <span class="sy1">&lt;&lt;</span> <span class="st0">&#39; &#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="br0">(</span>id <span class="sy1">&gt;</span> <span class="nu0">1</span> <span class="sy4">?</span> <span class="st0">&quot;<span class="es1">\n</span><span class="es1">\n</span>&quot;</span> <span class="sy4">:</span> <span class="st0">&quot;<span class="es1">\n</span>&quot;</span><span class="br0">)</span><span class="sy4">;</span>
<span class="br0">}</span>
<span class="kw4">int</span> main<span class="br0">(</span><span class="br0">)</span>
<span class="br0">{</span>
<a href="cpp-container-vector.html"><span class="kw1269">std::<span class="me2">vector</span></span></a><span class="sy1">&lt;</span><a href="cpp-string-basic_string.html"><span class="kw1230">std::<span class="me2">string</span></span></a><span class="sy1">&gt;</span>
v1<span class="br0">{</span><span class="st0">&quot;1&quot;</span>,<span class="st0">&quot;2&quot;</span>,<span class="st0">&quot;3&quot;</span>,<span class="st0">&quot;4&quot;</span><span class="br0">}</span>,
v2<span class="br0">{</span><span class="st0">&quot;&#11375;&quot;</span>,<span class="st0">&quot;B&quot;</span>,<span class="st0">&quot;&#390;&quot;</span>,<span class="st0">&quot;D&quot;</span>,<span class="st0">&quot;&#398;&quot;</span><span class="br0">}</span><span class="sy4">;</span>
<a href="cpp-container-stack.html"><span class="kw1297">std::<span class="me2">stack</span></span></a> s1<span class="br0">{</span>std<span class="sy4">::</span><span class="me2">move</span><span class="br0">(</span>v1<span class="br0">)</span><span class="br0">}</span><span class="sy4">;</span>
<a href="cpp-container-stack.html"><span class="kw1297">std::<span class="me2">stack</span></span></a> s2<span class="br0">{</span>std<span class="sy4">::</span><span class="me2">move</span><span class="br0">(</span>v2<span class="br0">)</span><span class="br0">}</span><span class="sy4">;</span>
print<span class="br0">(</span>s1, <span class="nu0">1</span><span class="br0">)</span><span class="sy4">;</span>
print<span class="br0">(</span>s2, <span class="nu0">2</span><span class="br0">)</span><span class="sy4">;</span>
s1.<span class="me1">swap</span><span class="br0">(</span>s2<span class="br0">)</span><span class="sy4">;</span>
print<span class="br0">(</span>s1, <span class="nu0">1</span><span class="br0">)</span><span class="sy4">;</span>
print<span class="br0">(</span>s2, <span class="nu0">2</span><span class="br0">)</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">s1 [4]: 4 3 2 1
s2 [5]: &#398; D &#390; B &#11375;
s1 [5]: &#398; D &#390; B &#11375;
s2 [4]: 4 3 2 1</pre></div>
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<h3><span class="mw-headline" id=".E7.BC.BA.E9.99.B7.E6.8A.A5.E5.91.8A">&#32570;&#38519;&#25253;&#21578;</span></h3>
<p>&#19979;&#21015;&#26356;&#25913;&#34892;&#20026;&#30340;&#32570;&#38519;&#25253;&#21578;&#36861;&#28335;&#22320;&#24212;&#29992;&#20110;&#20197;&#21069;&#20986;&#29256;&#30340; C++ &#26631;&#20934;&#12290;</p>
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<th>DR</th>
<th>&#24212;&#29992;&#20110;</th>
<th>&#20986;&#29256;&#26102;&#30340;&#34892;&#20026;</th>
<th>&#27491;&#30830;&#34892;&#20026;</th>
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<tr>
<td><a rel="nofollow" class="external text" href="https://cplusplus.github.io/LWG/issue2456">LWG 2456</a></td>
<td>C++11</td>
<td><code>noexcept</code> &#35268;&#23450;&#38750;&#33391;&#26500;</td>
<td>&#20351;&#20043;&#33021;&#29992;</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-stack-swap2.html"><span class="t-lines"><span>std::swap<span class="t-dsc-small">(std::stack)</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>
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</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>
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