350 lines
36 KiB
HTML
350 lines
36 KiB
HTML
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<title>std::map<Key,T,Compare,Allocator>::insert</title>
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::map<Key,T,Compare,Allocator>::</span>insert</h1>
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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-map.html">map</a></span></div>
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<div><span class="mw-geshi cpp source-cpp"><a href="cpp-utility-pair.html"><span class="kw1096">std::<span class="me2">pair</span></span></a><span class="sy1"><</span>iterator,<span class="kw4">bool</span><span class="sy1">></span> insert<span class="br0">(</span> <span class="kw4">const</span> value_type<span class="sy3">&</span> value <span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(1)</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> P <span class="sy1">></span><br />
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<a href="cpp-utility-pair.html"><span class="kw1096">std::<span class="me2">pair</span></span></a><span class="sy1"><</span>iterator,<span class="kw4">bool</span><span class="sy1">></span> insert<span class="br0">(</span> P<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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<div><span class="mw-geshi cpp source-cpp"><a href="cpp-utility-pair.html"><span class="kw1096">std::<span class="me2">pair</span></span></a><span class="sy1"><</span>iterator,<span class="kw4">bool</span><span class="sy1">></span> insert<span class="br0">(</span> value_type<span class="sy3">&&</span> value <span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(3)</td>
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<td><span class="t-mark-rev t-since-cxx17">(C++17 起)</span></td>
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<td rowspan="142">(4)</td>
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<div><span class="mw-geshi cpp source-cpp">iterator insert<span class="br0">(</span> iterator hint, <span class="kw4">const</span> value_type<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 hint, <span class="kw4">const</span> value_type<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"><span class="kw1">template</span><span class="sy1"><</span> <span class="kw1">class</span> P <span class="sy1">></span><br />
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iterator insert<span class="br0">(</span> const_iterator hint, P<span class="sy3">&&</span> value <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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<div><span class="mw-geshi cpp source-cpp">iterator insert<span class="br0">(</span> const_iterator hint, value_type<span class="sy3">&&</span> value <span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(6)</td>
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<td><span class="t-mark-rev t-since-cxx17">(C++17 起)</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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<span class="kw4">void</span> insert<span class="br0">(</span> InputIt first, InputIt last <span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(7)</td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">void</span> insert<span class="br0">(</span> <a href="cpp-utility-initializer_list.html"><span class="kw960">std::<span class="me2">initializer_list</span></span></a><span class="sy1"><</span>value_type<span class="sy1">></span> ilist <span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(8)</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">insert_return_type insert<span class="br0">(</span>node_type<span class="sy3">&&</span> nh<span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(9)</td>
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<td><span class="t-mark-rev t-since-cxx17">(C++17 起)</span></td>
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<div><span class="mw-geshi cpp source-cpp">iterator insert<span class="br0">(</span>const_iterator hint, node_type<span class="sy3">&&</span> nh<span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(10)</td>
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<td><span class="t-mark-rev t-since-cxx17">(C++17 起)</span></td>
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<p>若容器尚未含有带等价关键的元素，则插入元素到容器中。</p>
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<div class="t-li1"><span class="t-li">1-3)</span> 插入 <code>value</code> 。重载 <span class="t-v">(2)</span> 等价于 <span class="t-c"><span class="mw-geshi cpp source-cpp">emplace<span class="br0">(</span><a href="cpp-utility-forward.html"><span class="kw1117">std::<span class="me2">forward</span></span></a><span class="sy1"><</span>P<span class="sy1">></span><span class="br0">(</span>value<span class="br0">)</span><span class="br0">)</span></span></span> ，且仅若 <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-types-is_constructible.html"><span class="kw520">std::<span class="me2">is_constructible</span></span></a><span class="sy1"><</span>value_type, P<span class="sy3">&&</span><span class="sy1">></span><span class="sy4">::</span><span class="me2">value</span> <span class="sy1">==</span> <span class="kw2">true</span></span></span> 才参与重载决议。</div>
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<div class="t-li1"><span class="t-li">4-6)</span> 插入 <code>value</code> 到尽可能接近，恰好前于<span class="t-mark-rev t-since-cxx11">(C++11 起)</span> <code>hint</code> 的位置。重载 <span class="t-v">(4)</span> 等价于 <span class="t-c"><span class="mw-geshi cpp source-cpp">emplace_hint<span class="br0">(</span>hint, <a href="cpp-utility-forward.html"><span class="kw1117">std::<span class="me2">forward</span></span></a><span class="sy1"><</span>P<span class="sy1">></span><span class="br0">(</span>value<span class="br0">)</span><span class="br0">)</span></span></span> ，且仅若 <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-types-is_constructible.html"><span class="kw520">std::<span class="me2">is_constructible</span></span></a><span class="sy1"><</span>value_type, P<span class="sy3">&&</span><span class="sy1">></span><span class="sy4">::</span><span class="me2">value</span> <span class="sy1">==</span> <span class="kw2">true</span></span></span> 才参与重载决议。</div>
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<div class="t-li1"><span class="t-li">7)</span> 插入来自范围 <code>[first, last)</code> 的元素。若范围中的多个元素拥有比较等价的关键，则插入哪个元素是未指定的（待决的 <a rel="nofollow" class="external text" href="https://cplusplus.github.io/LWG/issue2844">LWG2844</a> ）。</div>
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<div class="t-li1"><span class="t-li">8)</span> 插入来自 initializer_list <code>ilist</code> 的元素。若范围中的多个元素拥有比较等价的关键，则插入哪个元素是未指定的（待决的 <a rel="nofollow" class="external text" href="https://cplusplus.github.io/LWG/issue2844">LWG2844</a> ）。</div>
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<div class="t-li1"><span class="t-li">9)</span> 若 <code>nh</code> 是空的<a href="cpp-container-node_handle.html">结点把柄</a>，则不做任何事。否则插入 <code>nh</code> 所占有的元素到容器，若容器尚未含有拥有等价于 <span class="t-c"><span class="mw-geshi cpp source-cpp">nh.<span class="me1">key</span><span class="br0">(</span><span class="br0">)</span></span></span> 的关键的元素。若 <code>nh</code> 非空且 <span class="t-c"><span class="mw-geshi cpp source-cpp">get_allocator<span class="br0">(</span><span class="br0">)</span> <span class="sy3">!</span><span class="sy1">=</span> nh.<span class="me1">get_allocator</span><span class="br0">(</span><span class="br0">)</span></span></span> 则行为未定义。</div>
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<div class="t-li1"><span class="t-li">10)</span> 若 <code>nh</code> 是空的<a href="cpp-container-node_handle.html">结点把柄</a>，则不做任何事并返回尾迭代器。否则，插入 <code>nh</code> 所占有的元素到容器，若容器尚未含有拥有等价于 <span class="t-c"><span class="mw-geshi cpp source-cpp">nh.<span class="me1">key</span><span class="br0">(</span><span class="br0">)</span></span></span> 的关键的元素，并返回指向拥有等于 <span class="t-c"><span class="mw-geshi cpp source-cpp">nh.<span class="me1">key</span><span class="br0">(</span><span class="br0">)</span></span></span> 的关键的元素的迭代器（无关乎插入成功还是失败）。若插入成功，则从 <code>nh</code> 移动，否则它保持该元素的所有权。元素被插入到尽可能接近正好先于 <code>hint</code> 的位置。若 <code>nh</code> 非空且 <span class="t-c"><span class="mw-geshi cpp source-cpp">get_allocator<span class="br0">(</span><span class="br0">)</span> <span class="sy3">!</span><span class="sy1">=</span> nh.<span class="me1">get_allocator</span><span class="br0">(</span><span class="br0">)</span></span></span> 则行为未定义。</div>
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<p>没有迭代器或引用被非法化。<span class="t-rev-inl t-since-cxx17"><span>若插入成功，则在结点把柄保有元素时获得的指向该元素的指针和引用被非法化，而在提取前获得的指向元素的指针和引用变得合法。</span> <span><span class="t-mark-rev t-since-cxx17">(C++17 起)</span></span></span></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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<td>hint</td>
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<td>-</td>
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<p>用作搜索开始位置的建议的迭代器</p>
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</td>
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<td><span class="t-mark-rev t-until-cxx11">(C++11 前)</span></td>
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<p>指向将插入新元素到其前的位置的迭代器</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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<td>value</td>
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<td>-</td>
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<td>要插入的值</td>
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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</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>插入值来源的 initializer_list</td>
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<td>nh</td>
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<td>-</td>
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<td>兼容的<a href="cpp-container-node_handle.html">结点把柄</a></td>
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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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<code>InputIt</code> 必须满足<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> 的要求。</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">1-3)</span> 返回由指向被插入元素的迭代器（或阻止插入的元素的迭代器）和指代插入是否发生的 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">bool</span></span></span> 组成的 pair 。</div>
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<div class="t-li1"><span class="t-li">4-6)</span> 返回指向被插入元素的迭代器，或指向阻止插入的元素的迭代器。</div>
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<div class="t-li1"><span class="t-li">7-8)</span> （无）</div>
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<div class="t-li1"><span class="t-li">9)</span> 返回 <code>insert_return_type</code> ，其成员初始化如下：若 <code>nh</code> 为空，则 <code>inserted</code> 为 <code>false</code> ， <code>position</code> 为 <span class="t-c"><span class="mw-geshi cpp source-cpp">end<span class="br0">(</span><span class="br0">)</span></span></span> ，而 <code>node</code> 为空。否则发生插入， <code>inserted</code> 为 <code>true</code> ， <code>position</code> 指向被插入元素，而 <code>node</code> 为空。若插入失败，则 <code>inserted</code> 为 <code>false</code> ， <code>node</code> 拥有 <code>nh</code> 的先前值，而 <code>position</code> 指向拥有等价于 <span class="t-c"><span class="mw-geshi cpp source-cpp">nh.<span class="me1">key</span><span class="br0">(</span><span class="br0">)</span></span></span> 的关键的元素。</div>
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<div class="t-li1"><span class="t-li">10)</span> 若 <code>nh</code> 为空则为尾迭代器，若插入发生则为指向被插入元素的迭代器，而若插入失败则为指向拥有等价于 <span class="t-c"><span class="mw-geshi cpp source-cpp">nh.<span class="me1">key</span><span class="br0">(</span><span class="br0">)</span></span></span> 的关键的元素的迭代器。</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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<div class="t-li1"><span class="t-li">1-6)</span> 若任何操作抛出异常，则插入无效果（强异常保证）。</div>
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<div class="t-li1"><span class="t-li">7-8)</span> 若任何操作抛出异常，则程序在合法状态（基础异常保证）。</div>
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<div class="t-li1"><span class="t-li">9-10)</span> 若任何操作抛出异常，则插入无效果， nh 保持不变（强异常保证）。</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">1-3)</span> 与容器大小成对数， <code>O(log(size()))</code> 。</div>
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<div class="t-li1"><span class="t-li">4-6)</span> 若插入恰好发生在 hint <i>后</i>的位置则为均摊常数，否则与容器大小成对数。</div>
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</td>
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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-rev t-since-cxx11">
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<div class="t-li1"><span class="t-li">4-6)</span> 若插入恰好发生在 hint <i>前</i>的位置则为均摊常数，否则与容器大小成对数。</div>
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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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<div class="t-li1"><span class="t-li">7-8)</span> <code>O(N*log(size() + N))</code> ，其中 N 是要插入的元素数。</div>
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<div class="t-li1"><span class="t-li">9)</span> 与容器大小成对数， <code>O(log(size()))</code> 。</div>
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<div class="t-li1"><span class="t-li">10)</span> 若插入恰好发生在 hint <i>前</i>的位置则为均摊常数，否则与容器大小成对数。</div>
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<p><br /></p>
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<h3><span class="mw-headline" id=".E6.B3.A8.E8.A7.A3">注解</span></h3>
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<p>有提示插入 <span class="t-v">(4-6)</span> 不返回 bool ，这是为了与顺序容器上的定位插入，如 <span class="t-lc"><a href="cpp-container-vector-insert.html">std::vector::insert</a></span> 签名兼容。这使得可以创建泛型插入器，例如 <span class="t-lc"><a href="cpp-iterator-inserter.html">std::inserter</a></span> 。检查有提示插入是否成功的一种方式是比较插入前后的 <a href="cpp-container-map-size.html">size()</a> 。</p>
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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 <iomanip></span>
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<span class="co2">#include <iostream></span>
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<span class="co2">#include <map></span>
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<span class="co2">#include <string></span>
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<span class="kw1">using</span> <span class="kw1">namespace</span> std<span class="sy4">::</span><span class="me2">literals</span><span class="sy4">;</span>
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<span class="kw1">template</span><span class="sy1"><</span><span class="kw1">typename</span> It<span class="sy1">></span>
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<span class="kw4">void</span> printInsertionStatus<span class="br0">(</span>It it, <span class="kw4">bool</span> success<span class="br0">)</span>
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<span class="br0">{</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">"Insertion of "</span> <span class="sy1"><<</span> it<span class="sy2">-</span><span class="sy1">></span>first <span class="sy1"><<</span> <span class="br0">(</span>success <span class="sy4">?</span> <span class="st0">" succeeded<span class="es1">\n</span>"</span> <span class="sy4">:</span> <span class="st0">" failed<span class="es1">\n</span>"</span><span class="br0">)</span><span class="sy4">;</span>
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<span class="br0">}</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-map.html"><span class="kw1281">std::<span class="me2">map</span></span></a><span class="sy1"><</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">></span> karasunoPlayerHeights<span class="sy4">;</span>
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<span class="co1">// 重载 3 ：从右值引用插入</span>
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<span class="kw4">const</span> <span class="kw4">auto</span> <span class="br0">[</span>it_hinata, success<span class="br0">]</span> <span class="sy1">=</span> karasunoPlayerHeights.<span class="me1">insert</span><span class="br0">(</span><span class="br0">{</span><span class="st0">"Hinata"</span>s, <span class="nu16">162.8</span><span class="br0">}</span><span class="br0">)</span><span class="sy4">;</span>
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printInsertionStatus<span class="br0">(</span>it_hinata, success<span class="br0">)</span><span class="sy4">;</span>
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<span class="br0">{</span>
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<span class="co1">// 重载 1 ：从左值引用插入</span>
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<span class="kw4">const</span> <span class="kw4">auto</span> <span class="br0">[</span>it, success2<span class="br0">]</span> <span class="sy1">=</span> karasunoPlayerHeights.<span class="me1">insert</span><span class="br0">(</span><span class="sy2">*</span>it_hinata<span class="br0">)</span><span class="sy4">;</span>
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printInsertionStatus<span class="br0">(</span>it, success2<span class="br0">)</span><span class="sy4">;</span>
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<span class="br0">}</span>
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<span class="br0">{</span>
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<span class="co1">// 重载 2 ：经由转发到 emplace 插入</span>
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<span class="kw4">const</span> <span class="kw4">auto</span> <span class="br0">[</span>it, success<span class="br0">]</span> <span class="sy1">=</span> karasunoPlayerHeights.<span class="me1">insert</span><span class="br0">(</span><span class="br0">{</span><span class="st0">"Kageyama"</span>, <span class="nu16">180.6</span><span class="br0">}</span><span class="br0">)</span><span class="sy4">;</span>
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printInsertionStatus<span class="br0">(</span>it, success<span class="br0">)</span><span class="sy4">;</span>
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<span class="br0">}</span>
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<span class="br0">{</span>
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<span class="co1">// 重载 6 ：带位置提示从右值引用插入</span>
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<span class="kw4">const</span> <a href="cpp-types-size_t.html"><span class="kw100">std::<span class="me2">size_t</span></span></a> n <span class="sy1">=</span> <a href="cpp-iterator-size.html"><span class="kw684">std::<span class="me2">size</span></span></a><span class="br0">(</span>karasunoPlayerHeights<span class="br0">)</span><span class="sy4">;</span>
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<span class="kw4">const</span> <span class="kw4">auto</span> it <span class="sy1">=</span> karasunoPlayerHeights.<span class="me1">insert</span><span class="br0">(</span>it_hinata, <span class="br0">{</span><span class="st0">"Azumane"</span>s, <span class="nu16">184.7</span><span class="br0">}</span><span class="br0">)</span><span class="sy4">;</span>
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printInsertionStatus<span class="br0">(</span>it, <a href="cpp-iterator-size.html"><span class="kw684">std::<span class="me2">size</span></span></a><span class="br0">(</span>karasunoPlayerHeights<span class="br0">)</span> <span class="sy3">!</span><span class="sy1">=</span> n<span class="br0">)</span><span class="sy4">;</span>
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<span class="br0">}</span>
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<span class="br0">{</span>
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<span class="co1">// 重载 4 ：带位置提示从左值引用插入</span>
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<span class="kw4">const</span> <a href="cpp-types-size_t.html"><span class="kw100">std::<span class="me2">size_t</span></span></a> n <span class="sy1">=</span> <a href="cpp-iterator-size.html"><span class="kw684">std::<span class="me2">size</span></span></a><span class="br0">(</span>karasunoPlayerHeights<span class="br0">)</span><span class="sy4">;</span>
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<span class="kw4">const</span> <span class="kw4">auto</span> it <span class="sy1">=</span> karasunoPlayerHeights.<span class="me1">insert</span><span class="br0">(</span>it_hinata, <span class="sy2">*</span>it_hinata<span class="br0">)</span><span class="sy4">;</span>
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printInsertionStatus<span class="br0">(</span>it, <a href="cpp-iterator-size.html"><span class="kw684">std::<span class="me2">size</span></span></a><span class="br0">(</span>karasunoPlayerHeights<span class="br0">)</span> <span class="sy3">!</span><span class="sy1">=</span> n<span class="br0">)</span><span class="sy4">;</span>
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<span class="br0">}</span>
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<span class="br0">{</span>
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<span class="co1">// 重载 5 ：带位置提示经由转发到 emplace 插入</span>
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<span class="kw4">const</span> <a href="cpp-types-size_t.html"><span class="kw100">std::<span class="me2">size_t</span></span></a> n <span class="sy1">=</span> <a href="cpp-iterator-size.html"><span class="kw684">std::<span class="me2">size</span></span></a><span class="br0">(</span>karasunoPlayerHeights<span class="br0">)</span><span class="sy4">;</span>
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<span class="kw4">const</span> <span class="kw4">auto</span> it <span class="sy1">=</span> karasunoPlayerHeights.<span class="me1">insert</span><span class="br0">(</span>it_hinata, <span class="br0">{</span><span class="st0">"Tsukishima"</span>, <span class="nu16">188.3</span><span class="br0">}</span><span class="br0">)</span><span class="sy4">;</span>
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printInsertionStatus<span class="br0">(</span>it, <a href="cpp-iterator-size.html"><span class="kw684">std::<span class="me2">size</span></span></a><span class="br0">(</span>karasunoPlayerHeights<span class="br0">)</span> <span class="sy3">!</span><span class="sy1">=</span> n<span class="br0">)</span><span class="sy4">;</span>
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<span class="br0">}</span>
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<span class="kw4">auto</span> node_hinata <span class="sy1">=</span> karasunoPlayerHeights.<span class="me1">extract</span><span class="br0">(</span>it_hinata<span class="br0">)</span><span class="sy4">;</span>
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<a href="cpp-container-map.html"><span class="kw1281">std::<span class="me2">map</span></span></a><span class="sy1"><</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">></span> playerHeights<span class="sy4">;</span>
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<span class="co1">// 重载 7 ：从范围插入</span>
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playerHeights.<span class="me1">insert</span><span class="br0">(</span><a href="cpp-iterator-begin.html"><span class="kw676">std::<span class="me2">begin</span></span></a><span class="br0">(</span>karasunoPlayerHeights<span class="br0">)</span>, <a href="cpp-iterator-end.html"><span class="kw680">std::<span class="me2">end</span></span></a><span class="br0">(</span>karasunoPlayerHeights<span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span>
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<span class="co1">// 重载 8 ：从 initializer_list 插入</span>
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playerHeights.<span class="me1">insert</span><span class="br0">(</span><span class="br0">{</span><span class="br0">{</span><span class="st0">"Kozume"</span>s, <span class="nu16">169.2</span><span class="br0">}</span>, <span class="br0">{</span><span class="st0">"Kuroo"</span>, <span class="nu16">187.7</span><span class="br0">}</span><span class="br0">}</span><span class="br0">)</span><span class="sy4">;</span>
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<span class="co1">// 重载 9 ：插入结点</span>
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<span class="kw4">const</span> <span class="kw4">auto</span> status <span class="sy1">=</span> playerHeights.<span class="me1">insert</span><span class="br0">(</span>std<span class="sy4">::</span><span class="me2">move</span><span class="br0">(</span>node_hinata<span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span>
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printInsertionStatus<span class="br0">(</span>status.<span class="me1">position</span>, status.<span class="me1">inserted</span><span class="br0">)</span><span class="sy4">;</span>
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node_hinata <span class="sy1">=</span> playerHeights.<span class="me1">extract</span><span class="br0">(</span>status.<span class="me1">position</span><span class="br0">)</span><span class="sy4">;</span>
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<span class="br0">{</span>
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<span class="co1">// 重载 10 ：插入结点带位置提示</span>
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<span class="kw4">const</span> <a href="cpp-types-size_t.html"><span class="kw100">std::<span class="me2">size_t</span></span></a> n <span class="sy1">=</span> <a href="cpp-iterator-size.html"><span class="kw684">std::<span class="me2">size</span></span></a><span class="br0">(</span>playerHeights<span class="br0">)</span><span class="sy4">;</span>
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<span class="kw4">const</span> <span class="kw4">auto</span> it <span class="sy1">=</span> playerHeights.<span class="me1">insert</span><span class="br0">(</span><a href="cpp-iterator-begin.html"><span class="kw676">std::<span class="me2">begin</span></span></a><span class="br0">(</span>playerHeights<span class="br0">)</span>, std<span class="sy4">::</span><span class="me2">move</span><span class="br0">(</span>node_hinata<span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span>
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printInsertionStatus<span class="br0">(</span>it, <a href="cpp-iterator-size.html"><span class="kw684">std::<span class="me2">size</span></span></a><span class="br0">(</span>playerHeights<span class="br0">)</span> <span class="sy3">!</span><span class="sy1">=</span> n<span class="br0">)</span><span class="sy4">;</span>
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<span class="br0">}</span>
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<span class="co1">// 打印结果 map</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> <a href="cpp-io-manip-left.html"><span class="kw1779">std::<span class="me2">left</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="kw1">for</span> <span class="br0">(</span><span class="kw4">const</span> <span class="kw4">auto</span><span class="sy3">&</span> <span class="br0">[</span>name, height<span class="br0">]</span> <span class="sy4">:</span> playerHeights<span class="br0">)</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> <a href="cpp-io-manip-setw.html"><span class="kw1797">std::<span class="me2">setw</span></span></a><span class="br0">(</span><span class="nu0">10</span><span class="br0">)</span> <span class="sy1"><<</span> name <span class="sy1"><<</span> <span class="st0">" | "</span> <span class="sy1"><<</span> height <span class="sy1"><<</span> <span class="st0">"cm<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">Insertion of Hinata succeeded
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Insertion of Hinata failed
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Insertion of Kageyama succeeded
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Insertion of Azumane succeeded
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Insertion of Hinata failed
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Insertion of Tsukishima succeeded
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Insertion of Hinata succeeded
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Insertion of Hinata succeeded
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Azumane | 184.7cm
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Hinata | 162.8cm
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Kageyama | 180.6cm
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Kozume | 169.2cm
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Kuroo | 187.7cm
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Tsukishima | 188.3cm</pre></div>
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</div>
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</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-map-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-map-emplace_hint.html"><span class="t-lines"><span>emplace_hint</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>使用提示原位构造元素<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-map-insert_or_assign.html"><span class="t-lines"><span>insert_or_assign</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
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</div>
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</td>
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<td>插入元素，或若键已存在则赋值给当前元素<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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</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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</body>
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</html>
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