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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::tuple&lt;Types...&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-utility.html">utility</a>&lrm; | <a href="cpp-utility-tuple.html">tuple</a></span></div>
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<div>&#23450;&#20041;&#20110;&#22836;&#25991;&#20214; <code><a href="cpp-header-tuple.html">&lt;tuple&gt;</a></code></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">void</span> swap<span class="br0">(</span> tuple<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><br />
<span class="t-mark-rev t-until-cxx20">(C++20 &#21069;)</span></td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">constexpr</span> <span class="kw4">void</span> swap<span class="br0">(</span> tuple<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-cxx20">(C++20 &#36215;)</span></td>
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<p>&#23545; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">*</span>this</span></span> &#20013;&#30340;&#27599;&#20010;&#20803;&#32032;&#19982; <code>other</code> &#20013;&#20854;&#23545;&#24212;&#20803;&#32032;&#35843;&#29992; <code>swap</code> &#65288;&#21487;&#20197;&#26159; <span class="t-lc"><a href="cpp-algorithm-swap.html">std::swap</a></span> &#65292;&#25110;&#36890;&#36807; ADL &#25214;&#21040;&#30340;&#65289;&#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;&#20540;&#30340; <code>tuple</code></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><br /></span></span>
<p>&nbsp; &nbsp; <span class="kw1">noexcept</span><span class="br0">(</span>swap<span class="br0">(</span><a href="cpp-utility-declval.html"><span class="kw1120">std::<span class="me2">declval</span></span></a><span class="sy1">&lt;</span>T0<span class="sy3">&amp;</span><span class="sy1">&gt;&gt;</span><span class="br0">(</span><span class="br0">)</span>, <a href="cpp-utility-declval.html"><span class="kw1120">std::<span class="me2">declval</span></span></a><span class="sy1">&lt;</span>T0<span class="sy3">&amp;</span><span class="sy1">&gt;</span><span class="br0">(</span><span class="br0">)</span><span class="br0">)</span><span class="br0">)</span> <span class="sy3">&amp;&amp;</span><br />
&nbsp; &nbsp; <span class="kw1">noexcept</span><span class="br0">(</span>swap<span class="br0">(</span><a href="cpp-utility-declval.html"><span class="kw1120">std::<span class="me2">declval</span></span></a><span class="sy1">&lt;</span>T1<span class="sy3">&amp;</span><span class="sy1">&gt;&gt;</span><span class="br0">(</span><span class="br0">)</span>, <a href="cpp-utility-declval.html"><span class="kw1120">std::<span class="me2">declval</span></span></a><span class="sy1">&lt;</span>T1<span class="sy3">&amp;</span><span class="sy1">&gt;</span><span class="br0">(</span><span class="br0">)</span><span class="br0">)</span><span class="br0">)</span> <span class="sy3">&amp;&amp;</span><br />
&nbsp; &nbsp; <span class="kw1">noexcept</span><span class="br0">(</span>swap<span class="br0">(</span><a href="cpp-utility-declval.html"><span class="kw1120">std::<span class="me2">declval</span></span></a><span class="sy1">&lt;</span>T2<span class="sy3">&amp;</span><span class="sy1">&gt;&gt;</span><span class="br0">(</span><span class="br0">)</span>, <a href="cpp-utility-declval.html"><span class="kw1120">std::<span class="me2">declval</span></span></a><span class="sy1">&lt;</span>T2<span class="sy3">&amp;</span><span class="sy1">&gt;</span><span class="br0">(</span><span class="br0">)</span><span class="br0">)</span><span class="br0">)</span> <span class="sy3">&amp;&amp;</span><br />
&nbsp; &nbsp; ...<br /></p>
<span class="br0">)</span></div>
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<p>&#19978;&#36848;&#34920;&#36798;&#24335;&#20013;&#65292;&#20197; 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-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><br /></span></span>
<p>&nbsp; &nbsp; <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>T0<span class="sy1">&gt;</span> <span class="sy3">&amp;&amp;</span><br />
&nbsp; &nbsp; <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>T1<span class="sy1">&gt;</span> <span class="sy3">&amp;&amp;</span><br />
&nbsp; &nbsp; <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>T2<span class="sy1">&gt;</span> <span class="sy3">&amp;&amp;</span><br />
&nbsp; &nbsp; ...<br /></p>
<span class="br0">)</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=".E7.A4.BA.E4.BE.8B">&#31034;&#20363;</span></h3>
<div class="t-example">
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<pre class="de1"><span class="co2">#include &lt;iostream&gt;</span>
<span class="co2">#include &lt;tuple&gt;</span>
<span class="co2">#include &lt;string&gt;</span>
<span class="kw4">int</span> main<span class="br0">(</span><span class="br0">)</span>
<span class="br0">{</span>
<a href="cpp-utility-tuple.html"><span class="kw1098">std::<span class="me2">tuple</span></span></a><span class="sy1">&lt;</span><span class="kw4">int</span>, <a href="cpp-string-basic_string.html"><span class="kw1230">std::<span class="me2">string</span></span></a>, <span class="kw4">float</span><span class="sy1">&gt;</span> p1, p2<span class="sy4">;</span>
p1 <span class="sy1">=</span> <a href="cpp-utility-tuple-make_tuple.html"><span class="kw1112">std::<span class="me2">make_tuple</span></span></a><span class="br0">(</span><span class="nu0">10</span>, <span class="st0">&quot;test&quot;</span>, <span class="nu16">3.14</span><span class="br0">)</span><span class="sy4">;</span>
p2.<span class="me1">swap</span><span class="br0">(</span>p1<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">&quot;(&quot;</span> <span class="sy1">&lt;&lt;</span> std<span class="sy4">::</span><span class="me2">get</span><span class="sy1">&lt;</span><span class="nu0">0</span><span class="sy1">&gt;</span><span class="br0">(</span>p2<span class="br0">)</span>
<span class="sy1">&lt;&lt;</span> <span class="st0">&quot;, &quot;</span> <span class="sy1">&lt;&lt;</span> std<span class="sy4">::</span><span class="me2">get</span><span class="sy1">&lt;</span><span class="nu0">1</span><span class="sy1">&gt;</span><span class="br0">(</span>p2<span class="br0">)</span>
<span class="sy1">&lt;&lt;</span> <span class="st0">&quot;, &quot;</span> <span class="sy1">&lt;&lt;</span> std<span class="sy4">::</span><span class="me2">get</span><span class="sy1">&lt;</span><span class="nu0">2</span><span class="sy1">&gt;</span><span class="br0">(</span>p2<span class="br0">)</span> <span class="sy1">&lt;&lt;</span> <span class="st0">&quot;)<span class="es1">\n</span>&quot;</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">(10, test, 3.14)</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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<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;&#26366;&#20026;&#30149;&#24335;</td>
<td>&#20196;&#23427;&#26377;&#25928;</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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