230 lines
14 KiB
HTML
230 lines
14 KiB
HTML
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<title>std::list<T,Allocator>::insert</title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_container_list_insert skin-cppreference2 action-view cpp-page-template cpp-navbar">
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::list<T,Allocator>::</span>insert</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-list.html">list</a></span></div>
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<td></td>
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<td rowspan="142">(1)</td>
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<div><span class="mw-geshi cpp source-cpp">iterator insert<span class="br0">(</span> iterator pos, <span class="kw4">const</span> T<span class="sy3">&</span> value <span class="br0">)</span><span class="sy4">;</span></span></div>
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<td><span class="t-mark-rev t-until-cxx11">(C++11 前)</span></td>
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<div><span class="mw-geshi cpp source-cpp">iterator insert<span class="br0">(</span> const_iterator pos, <span class="kw4">const</span> T<span class="sy3">&</span> value <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></td>
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<div><span class="mw-geshi cpp source-cpp">iterator insert<span class="br0">(</span> const_iterator pos, T<span class="sy3">&&</span> value <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 rowspan="142">(3)</td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">void</span> insert<span class="br0">(</span> iterator pos, size_type count, <span class="kw4">const</span> T<span class="sy3">&</span> value <span class="br0">)</span><span class="sy4">;</span></span></div>
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<td><span class="t-mark-rev t-until-cxx11">(C++11 前)</span></td>
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<tr class="t-dcl t-since-cxx11">
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<td>
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<div><span class="mw-geshi cpp source-cpp">iterator insert<span class="br0">(</span> const_iterator pos, size_type count, <span class="kw4">const</span> T<span class="sy3">&</span> value <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></td>
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<td rowspan="142">(4)</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> InputIt <span class="sy1">></span><br />
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<span class="kw4">void</span> insert<span class="br0">(</span> iterator pos, InputIt first, InputIt last<span class="br0">)</span><span class="sy4">;</span></span></div>
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<td class="t-dcl-nopad"></td>
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<td><span class="t-mark-rev t-until-cxx11">(C++11 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> InputIt <span class="sy1">></span><br />
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iterator insert<span class="br0">(</span> const_iterator pos, InputIt first, InputIt last <span class="br0">)</span><span class="sy4">;</span></span></div>
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<td class="t-dcl-nopad"></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 insert<span class="br0">(</span> const_iterator pos, <a href="cpp-utility-initializer_list.html"><span class="kw960">std::<span class="me2">initializer_list</span></span></a><span class="sy1"><</span>T<span class="sy1">></span> ilist <span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(5)</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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<td></td>
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<p>插入元素到容器中的指定位置。</p>
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<div class="t-li1"><span class="t-li">1-2)</span> 在 <code>pos</code> 前插入 <code>value</code> 。</div>
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<div class="t-li1"><span class="t-li">3)</span> 在 <code>pos</code> 前插入 <code>value</code> 的 <code>count</code> 个副本。</div>
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<div class="t-li1"><span class="t-li">4)</span> 在 <code>pos</code> 前插入来自范围 <code>[first, last)</code> 的元素。
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<p>若 <code>InputIt</code> 为整数类型，则此重载与重载 <span class="t-v">(3)</span> 拥有相同效果。</p>
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<td><span class="t-mark-rev t-until-cxx11">(C++11 前)</span></td>
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<p>此重载仅若 <code>InputIt</code> 足以为<a href="cpp-named_req-InputIterator.html"><span style="font-style:italic">老式输入迭代器</span> <span style="font-family: Georgia, 'DejaVu Serif', serif; font-style:italic">(LegacyInputIterator)</span></a> 才参与重载决议，以避免与重载 <span class="t-v">(3)</span> 有歧义。</p>
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</td>
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<td><span class="t-mark-rev t-since-cxx11">(C++11 起)</span></td>
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若 <code>first</code> 和 <code>last</code> 是指向 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">*</span>this</span></span> 中的迭代器，则行为未定义。</div>
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<div class="t-li1"><span class="t-li">5)</span> 在 <code>pos</code> 前插入来自 initializer_list <code>ilist</code> 的元素。</div>
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<p>没有引用和迭代器被非法化。</p>
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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>将内容插入到其前的迭代器。 <code>pos</code> 可为 <span class="t-lc"><a href="cpp-container-list-end.html">end()</a></span> 迭代器</td>
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</tr>
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<tr class="t-par">
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<td>value</td>
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<td>-</td>
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<td>要插入的元素值</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>要插入的元素范围，不能是指向调用 insert 所用的容器中的迭代器</td>
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</tr>
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<tr class="t-par">
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<td>ilist</td>
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<td>-</td>
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<td>要插入的值来源的 initializer_list</td>
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<tr class="t-par-hitem">
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<td colspan="3">类型要求</td>
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<tr class="t-par-req">
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<td colspan="3">-
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<div class="spacer"></div>
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为使用重载 (1) ， <code>T</code> 必须满足<a href="cpp-named_req-CopyInsertable.html"><span style="font-style:italic">可复制插入</span> <span style="font-family: Georgia, 'DejaVu Serif', serif; font-style:italic">(CopyInsertable)</span></a> 的要求。</td>
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<tr class="t-par-req">
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<td colspan="3">-
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<div class="spacer"></div>
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为使用重载 (2) ， <code>T</code> 必须满足<a href="cpp-named_req-MoveInsertable.html"><span style="font-style:italic">可移动插入</span> <span style="font-family: Georgia, 'DejaVu Serif', serif; font-style:italic">(MoveInsertable)</span></a> 的要求。</td>
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<tr class="t-par-req">
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<td colspan="3">-
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<div class="spacer"></div>
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为使用重载 (3) ， <code>T</code> 必须满足<a href="cpp-named_req-CopyAssignable.html"><span style="font-style:italic">可复制赋值</span> <span style="font-family: Georgia, 'DejaVu Serif', serif; font-style:italic">(CopyAssignable)</span></a> 和 <a href="cpp-named_req-CopyInsertable.html"><span style="font-style:italic">可复制插入</span> <span style="font-family: Georgia, 'DejaVu Serif', serif; font-style:italic">(CopyInsertable)</span></a> 的要求。</td>
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<tr class="t-par-req">
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<td colspan="3">-
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<div class="spacer"></div>
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为使用重载 (4,5) ， <code>T</code> 必须满足<a href="cpp-named_req-EmplaceConstructible.html"><span style="font-style:italic">可就位构造</span> <span style="font-family: Georgia, 'DejaVu Serif', serif; font-style:italic">(EmplaceConstructible)</span></a> 的要求。
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<p><br /></p>
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</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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<div class="t-li1"><span class="t-li">1-2)</span> 指向被插入 <code>value</code> 的迭代器。</div>
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<div class="t-li1"><span class="t-li">3)</span> 指向首个被插入元素的迭代器，或若 <span class="t-c"><span class="mw-geshi cpp source-cpp">count<span class="sy1">==</span><span class="nu0">0</span></span></span> 则为 <code>pos</code> 。</div>
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<div class="t-li1"><span class="t-li">4)</span> 指向首个被插入元素的迭代器，或若 <span class="t-c"><span class="mw-geshi cpp source-cpp">first<span class="sy1">==</span>last</span></span> 则为 <code>pos</code> 。</div>
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<div class="t-li1"><span class="t-li">5)</span> 指向首个被插入元素的迭代器，或若 <code>ilist</code> 为空则为 <code>pos</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">1-2)</span> 常数。</div>
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<div class="t-li1"><span class="t-li">3)</span> 与 <span class="t-c"><span class="mw-geshi cpp source-cpp">count</span></span> 成线性。</div>
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<div class="t-li1"><span class="t-li">4)</span> 与 <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-iterator-distance.html"><span class="kw673">std::<span class="me2">distance</span></span></a><span class="br0">(</span>first, last<span class="br0">)</span></span></span> 成线性。</div>
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<div class="t-li1"><span class="t-li">5)</span> 与 <span class="t-c"><span class="mw-geshi cpp source-cpp">ilist.<span class="me1">size</span><span class="br0">(</span><span class="br0">)</span></span></span> 成线性。</div>
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<h3><span class="mw-headline" id=".E5.BC.82.E5.B8.B8">异常</span></h3>
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<p>若抛出异常，则无效果（强异常保证）。</p>
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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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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-container-list-emplace.html"><span class="t-lines"><span>emplace</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>原位构造元素<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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<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-list-push_front.html"><span class="t-lines"><span>push_front</span></span></a></div>
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</div>
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</td>
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<td>插入元素到容器起始<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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<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-list-push_back.html"><span class="t-lines"><span>push_back</span></span></a></div>
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</div>
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</td>
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<td>将元素添加到容器末尾<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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</table>
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</div>
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<div class="visualClear"></div>
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</div>
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</div>
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</div>
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