90 lines
5.2 KiB
HTML
90 lines
5.2 KiB
HTML
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<title>std::swap(std::tuple)</title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_utility_tuple_swap2 skin-cppreference2 action-view cpp-navbar">
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::</span>swap<small>(std::tuple)</small></h1>
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<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-utility.html">utility</a>‎ | <a href="cpp-utility-tuple.html">tuple</a></span></div>
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<div>定义于头文件 <code><a href="cpp-header-tuple.html"><tuple></a></code></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1"><</span> <span class="kw1">class</span>... <span class="me1">Types</span> <span class="sy1">></span><br />
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<span class="kw4">void</span> swap<span class="br0">(</span> tuple<span class="sy1"><</span>Types...<span class="sy1">></span><span class="sy3">&</span> lhs, tuple<span class="sy1"><</span>Types...<span class="sy1">></span><span class="sy3">&</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></span></div>
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<td><span class="t-mark-rev t-since-cxx11">(C++11 起)</span><br />
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<span class="t-mark-rev t-until-cxx20">(C++20 前)</span></td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1"><</span> <span class="kw1">class</span>... <span class="me1">Types</span> <span class="sy1">></span><br /></span>
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<p><span class="kw4">constexpr</span> <span class="kw4">void</span><br /></p>
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swap<span class="br0">(</span> tuple<span class="sy1"><</span>Types...<span class="sy1">></span><span class="sy3">&</span> lhs, tuple<span class="sy1"><</span>Types...<span class="sy1">></span><span class="sy3">&</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-cxx20">(C++20 起)</span></td>
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<p>交换 <code>lhs</code> 与 <code>rhs</code> 的内容。等价于 <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> 。</p>
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<p>此函数不参与重载决议，除非 <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-types-is_swappable.html"><span class="kw573">std::<span class="me2">is_swappable_v</span></span></a><span class="sy1"><</span>Ti<span class="sy1">></span></span></span> 对来自从 0 到 <code>sizeof...(Types)</code> 的所有 i 为 <code>true</code> 。</p>
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<td><span class="t-mark-rev t-since-cxx17">(C++17 起)</span></td>
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<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">参数</span></h3>
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<td>lhs, rhs</td>
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<td>-</td>
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<td>要交换内容的 <code>tuple</code></td>
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<h3><span class="mw-headline" id=".E8.BF.94.E5.9B.9E.E5.80.BC">返回值</span></h3>
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<p>（无）</p>
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<h3><span class="mw-headline" id=".E5.BC.82.E5.B8.B8">异常</span></h3>
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<div class="t-noexcept-full"><a href="cpp-language-noexcept_spec.html"><tt>noexcept</tt></a> 说明：
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<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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<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">参阅</span></h3>
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