179 lines
14 KiB
HTML
179 lines
14 KiB
HTML
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<title>std::list<T,Allocator>::splice</title>
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::list<T,Allocator>::</span>splice</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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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">void</span> splice<span class="br0">(</span> const_iterator pos, list<span class="sy3">&</span> other <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="kw4">void</span> splice<span class="br0">(</span> const_iterator pos, list<span class="sy3">&&</span> other <span class="br0">)</span><span class="sy4">;</span></span></div>
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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"><span class="kw4">void</span> splice<span class="br0">(</span> const_iterator pos, list<span class="sy3">&</span> other, const_iterator it <span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(2)</td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">void</span> splice<span class="br0">(</span> const_iterator pos, list<span class="sy3">&&</span> other, const_iterator it <span class="br0">)</span><span class="sy4">;</span></span></div>
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</td>
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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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</tr>
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<tr class="t-dcl t-since-cxx98">
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">void</span> splice<span class="br0">(</span> const_iterator pos, list<span class="sy3">&</span> other,<br />
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const_iterator first, const_iterator last<span class="br0">)</span><span class="sy4">;</span></span></div>
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</td>
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<td>(3)</td>
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<td class="t-dcl-nopad"></td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">void</span> splice<span class="br0">(</span> const_iterator pos, list<span class="sy3">&&</span> other,<br />
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const_iterator first, const_iterator last <span class="br0">)</span><span class="sy4">;</span></span></div>
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</td>
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<td>(3)</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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</tbody>
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</table>
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<p>从一个 list 转移元素给另一个。</p>
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<p>不复制或移动元素，仅重指向链表结点的内部指针。若 <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> other.<span class="me1">get_allocator</span><span class="br0">(</span><span class="br0">)</span></span></span> 则行为未定义。没有迭代器或引用被非法化，指向被移动元素的迭代器保持合法，但现在指代到 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">*</span>this</span></span> 中，而非到 <code>other</code> 中。</p>
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<div class="t-li1"><span class="t-li">1)</span> 从 <code>other</code> 转移所有元素到 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">*</span>this</span></span> 中。元素被插入到 <code>pos</code> 所指向的元素之前。操作后容器 <code>other</code> 变为空。若 <code>other</code> 与 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">*</span>this</span></span> 指代同一对象则行为未定义。</div>
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<div class="t-li1"><span class="t-li">2)</span> 从 <code>other</code> 转移 <code>it</code> 所指向的元素到 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">*</span>this</span></span> 。元素被插入到 <code>pos</code> 所指向的元素之前。</div>
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<div class="t-li1"><span class="t-li">3)</span> 从 <code>other</code> 转移范围 <code>[first, last)</code> 中的元素到 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">*</span>this</span></span> 。元素被插入到 <code>pos</code> 所指向的元素之前。若 <code>pos</code> 是范围 <code>[first,last)</code> 中的迭代器则行为未定义。</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>将插入内容到其前的元素</td>
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</tr>
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<tr class="t-par">
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<td>other</td>
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<td>-</td>
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<td>要自之转移内容的另一容器</td>
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</tr>
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<tr class="t-par">
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<td>it</td>
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<td>-</td>
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<td>要从 <code>other</code> 转移到 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">*</span>this</span></span> 的元素</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>要从 <code>other</code> 转移到 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">*</span>this</span></span> 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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<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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<p>不抛出。</p>
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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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<p>1-2) 常数。</p>
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<p>3) 若 <code>other</code> 与 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">*</span>this</span></span> 指代同一对象则为常数，否则与 <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。</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 <iostream></span>
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<span class="co2">#include <list></span>
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<a href="cpp-io-basic_ostream.html"><span class="kw1729">std::<span class="me2">ostream</span></span></a><span class="sy3">&</span> operator<span class="sy1"><<</span><span class="br0">(</span><a href="cpp-io-basic_ostream.html"><span class="kw1729">std::<span class="me2">ostream</span></span></a><span class="sy3">&</span> ostr, <span class="kw4">const</span> <a href="cpp-container-list.html"><span class="kw1275">std::<span class="me2">list</span></span></a><span class="sy1"><</span><span class="kw4">int</span><span class="sy1">></span><span class="sy3">&</span> list<span class="br0">)</span>
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<span class="br0">{</span>
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<span class="kw1">for</span> <span class="br0">(</span><span class="kw4">auto</span> <span class="sy3">&</span>i <span class="sy4">:</span> list<span class="br0">)</span> <span class="br0">{</span>
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ostr <span class="sy1"><<</span> <span class="st0">" "</span> <span class="sy1"><<</span> i<span class="sy4">;</span>
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<span class="br0">}</span>
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<span class="kw1">return</span> ostr<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-list.html"><span class="kw1275">std::<span class="me2">list</span></span></a><span class="sy1"><</span><span class="kw4">int</span><span class="sy1">></span> list1 <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="br0">}</span><span class="sy4">;</span>
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<a href="cpp-container-list.html"><span class="kw1275">std::<span class="me2">list</span></span></a><span class="sy1"><</span><span class="kw4">int</span><span class="sy1">></span> list2 <span class="sy1">=</span> <span class="br0">{</span> <span class="nu0">10</span>, <span class="nu0">20</span>, <span class="nu0">30</span>, <span class="nu0">40</span>, <span class="nu0">50</span> <span class="br0">}</span><span class="sy4">;</span>
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<span class="kw4">auto</span> it <span class="sy1">=</span> list1.<span class="me1">begin</span><span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
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<a href="cpp-iterator-advance.html"><span class="kw672">std::<span class="me2">advance</span></span></a><span class="br0">(</span>it, <span class="nu0">2</span><span class="br0">)</span><span class="sy4">;</span>
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list1.<span class="me1">splice</span><span class="br0">(</span>it, list2<span class="br0">)</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">"list1: "</span> <span class="sy1"><<</span> list1 <span class="sy1"><<</span> <span class="st0">"<span class="es1">\n</span>"</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">"list2: "</span> <span class="sy1"><<</span> list2 <span class="sy1"><<</span> <span class="st0">"<span class="es1">\n</span>"</span><span class="sy4">;</span>
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list2.<span class="me1">splice</span><span class="br0">(</span>list2.<span class="me1">begin</span><span class="br0">(</span><span class="br0">)</span>, list1, it, list1.<span class="me1">end</span><span class="br0">(</span><span class="br0">)</span><span class="br0">)</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">"list1: "</span> <span class="sy1"><<</span> list1 <span class="sy1"><<</span> <span class="st0">"<span class="es1">\n</span>"</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">"list2: "</span> <span class="sy1"><<</span> list2 <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">list1: 1 2 10 20 30 40 50 3 4 5
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list2:
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list1: 1 2 10 20 30 40 50
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list2: 3 4 5</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-list-merge.html"><span class="t-lines"><span>merge</span></span></a></div>
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</div>
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</td>
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<td>合并二个已排序列表<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-remove.html"><span class="t-lines"><span>remove</span><span>remove_if</span></span></a></div>
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</div>
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</td>
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<td>移除满足特定标准的元素<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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</body>
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