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<title>std::forward_list<T,Allocator>::erase_after</title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_container_forward_list_erase_after 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::forward_list<T,Allocator>::</span>erase_after</h1>
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<div id="bodyContent">
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<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-container.html">container</a>‎ | <a href="cpp-container-forward_list.html">forward list</a></span></div>
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<div><span class="mw-geshi cpp source-cpp">iterator erase_after<span class="br0">(</span> const_iterator pos <span class="br0">)</span><span class="sy4">;</span></span></div>
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</td>
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<td>(1)</td>
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<td><span class="t-mark-rev t-since-cxx11">(C++11 起)</span></td>
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<div><span class="mw-geshi cpp source-cpp">iterator erase_after<span class="br0">(</span> const_iterator first, const_iterator last <span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(2)</td>
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<td><span class="t-mark-rev t-since-cxx11">(C++11 起)</span></td>
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<td></td>
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<p>从容器移除指定元素。</p>
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<div class="t-li1"><span class="t-li">1)</span> 移除 <code>pos</code> 后的元素。</div>
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<div class="t-li1"><span class="t-li">2)</span> 移除 <code>first</code> 后 <code>last</code> 前的元素。</div>
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<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">参数</span></h3>
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<table class="t-par-begin">
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<tr class="t-par">
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<td>pos</td>
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<td>-</td>
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<td>指向前趋要被移除元素的迭代器</td>
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</tr>
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<tr class="t-par">
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<td>first, last</td>
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<td>-</td>
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<td>要移除的元素范围</td>
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</tr>
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</table>
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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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<div class="t-li1"><span class="t-li">1)</span> 指向后随被擦除元素的迭代器，或若不存在这种元素则为 <span class="t-lc"><a href="cpp-container-forward_list-end.html">end()</a></span> 。</div>
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<div class="t-li1"><span class="t-li">2)</span> <code>last</code></div>
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<h3><span class="mw-headline" id=".E5.A4.8D.E6.9D.82.E5.BA.A6">复杂度</span></h3>
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<div class="t-li1"><span class="t-li">1)</span> 常数。</div>
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<div class="t-li1"><span class="t-li">2)</span> 与 <code>first</code> 和 <code>last</code> 之间的距离成线性。</div>
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<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">示例</span></h3>
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<div class="t-example">
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<div class="t-example-live-link"></div>
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<div dir="ltr" class="mw-geshi" style="text-align: left;">
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<div class="cpp source-cpp">
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<pre class="de1"><span class="co2">#include <forward_list></span>
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<span class="co2">#include <iterator></span>
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<span class="co2">#include <iostream></span>
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<span class="kw4">int</span> main<span class="br0">(</span><span class="br0">)</span>
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<span class="br0">{</span>
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<a href="cpp-container-forward_list.html"><span class="kw1273">std::<span class="me2">forward_list</span></span></a><span class="sy1"><</span><span class="kw4">int</span><span class="sy1">></span> l <span class="sy1">=</span> <span class="br0">{</span> <span class="nu0">1</span>, <span class="nu0">2</span>, <span class="nu0">3</span>, <span class="nu0">4</span>, <span class="nu0">5</span>, <span class="nu0">6</span>, <span class="nu0">7</span>, <span class="nu0">8</span>, <span class="nu0">9</span> <span class="br0">}</span><span class="sy4">;</span>
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<span class="co1">// l.erase( l.begin() ); // 错误：无要擦除的元素</span>
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l.<span class="me1">erase_after</span><span class="br0">(</span> l.<span class="me1">before_begin</span><span class="br0">(</span><span class="br0">)</span> <span class="br0">)</span><span class="sy4">;</span> <span class="co1">// 移除首元素</span>
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<span class="kw1">for</span><span class="br0">(</span> <span class="kw4">auto</span> n <span class="sy4">:</span> l <span class="br0">)</span> <a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1"><<</span> n <span class="sy1"><<</span> <span class="st0">" "</span><span class="sy4">;</span>
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<a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1"><<</span> <span class="st0">'<span class="es1">\n</span>'</span><span class="sy4">;</span>
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<span class="kw4">auto</span> fi<span class="sy1">=</span> <a href="cpp-iterator-next.html"><span class="kw674">std::<span class="me2">next</span></span></a><span class="br0">(</span> l.<span class="me1">begin</span><span class="br0">(</span><span class="br0">)</span> <span class="br0">)</span><span class="sy4">;</span>
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<span class="kw4">auto</span> la<span class="sy1">=</span> <a href="cpp-iterator-next.html"><span class="kw674">std::<span class="me2">next</span></span></a><span class="br0">(</span> fi, <span class="nu0">3</span> <span class="br0">)</span><span class="sy4">;</span>
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l.<span class="me1">erase_after</span><span class="br0">(</span> fi, la <span class="br0">)</span><span class="sy4">;</span>
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<span class="kw1">for</span><span class="br0">(</span> <span class="kw4">auto</span> n <span class="sy4">:</span> l <span class="br0">)</span> <a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1"><<</span> n <span class="sy1"><<</span> <span class="st0">" "</span><span class="sy4">;</span>
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<a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1"><<</span> <span class="st0">'<span class="es1">\n</span>'</span><span class="sy4">;</span>
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<span class="br0">}</span></pre></div>
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</div>
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<p>输出：</p>
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<div dir="ltr" class="mw-geshi" style="text-align: left;">
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<div class="text source-text">
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<pre class="de1">2 3 4 5 6 7 8 9
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2 3 6 7 8 9</pre></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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<table class="t-dsc-begin">
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-container-forward_list-clear.html"><span class="t-lines"><span>clear</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
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</div>
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</td>
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<td>清除内容<br />
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<span class="t-mark">(公开成员函数)</span></td>
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</tr>
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<div class="visualClear"></div>
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