492 lines
28 KiB
HTML
492 lines
28 KiB
HTML
<!DOCTYPE html>
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<html lang="zh" dir="ltr" class="client-nojs" xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh">
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<head><meta http-equiv="x-ua-compatible" content="ie=edge">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<title>std::vector<bool></title>
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<link rel="stylesheet" href="ext.css" />
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<link rel="stylesheet" href="site_modules.css" />
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</head>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_container_vector_bool skin-cppreference2 action-view cpp-navbar">
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<div id="cpp-content-base">
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<div id="content"><a id="top"></a>
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::</span>vector<bool></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></span></div>
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<div id="mw-content-text" lang="zh" dir="ltr" class="mw-content-ltr" xml:lang="zh">
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<table class="t-dcl-begin">
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<td>
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<div>定义于头文件 <code><a href="cpp-header-vector.html"><vector></a></code></div>
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</td>
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<td></td>
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<td></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> Allocator<span class="sy1">></span><br />
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<span class="kw1">class</span> vector<span class="sy1"><</span><span class="kw4">bool</span>, Allocator<span class="sy1">></span><span class="sy4">;</span></span></div>
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<td class="t-dcl-nopad"></td>
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<tr class="t-dcl-sep">
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<td></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><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-container-vector.html"><span class="kw1269">std::<span class="me2">vector</span></span></a><span class="sy1"><</span><span class="kw4">bool</span><span class="sy1">></span></span></span> 是 <span class="t-lc"><a href="cpp-container-vector.html">std::vector</a></span> 对类型 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">bool</span></span></span> 为空间提效的特化。</p>
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<p><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-container-vector.html"><span class="kw1269">std::<span class="me2">vector</span></span></a><span class="sy1"><</span><span class="kw4">bool</span><span class="sy1">></span></span></span> 中对空间提效的行为（以及它是否有优化）是实现定义的。一种潜在优化涉及到 vector 的元素联合，使得每个元素占用一个单独的位，而非 <span class="t-c"><span class="mw-geshi cpp source-cpp">sizeof<span class="br0">(</span><span class="kw4">bool</span><span class="br0">)</span></span></span> 字节。</p>
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<p><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-container-vector.html"><span class="kw1269">std::<span class="me2">vector</span></span></a><span class="sy1"><</span><span class="kw4">bool</span><span class="sy1">></span></span></span> 表现类似 <span class="t-lc"><a href="cpp-container-vector.html">std::vector</a></span> ，但为节省空间，它：</p>
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<ul>
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<li>不必作为连续数组存储元素</li>
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<li>暴露类 <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-container-vector.html"><span class="kw1269">std::<span class="me2">vector</span></span></a><span class="sy1"><</span><span class="kw4">bool</span><span class="sy1">></span><span class="sy4">::</span><span class="me2">reference</span></span></span> 为访问单个位的方法。尤其是，此类型的类为 <a href="cpp-container-vector-operator_at.html"><tt>operator[]</tt></a> 以值返回。</li>
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<li>不使用 <span class="t-c"><span class="mw-geshi cpp source-cpp">std<span class="sy4">::</span><span class="me2">allocator_traits</span><span class="sy4">::</span><span class="me2">construct</span></span></span> 构造位值。</li>
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<li>不保证同一容器中的不同元素能由不同线程同时修改。</li>
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</ul>
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<h3><span class="mw-headline" id=".E6.88.90.E5.91.98.E7.B1.BB.E5.9E.8B">成员类型</span></h3>
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<table class="t-dsc-begin">
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<tr class="t-dsc-hitem">
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<td>成员类型</td>
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<td>定义</td>
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</tr>
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<tr class="t-dsc">
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<td><code>value_type</code></td>
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<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">bool</span></span></span></td>
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</tr>
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<tr class="t-dsc">
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<td><code>allocator_type</code></td>
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<td><code>Allocator</code></td>
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</tr>
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<tr class="t-dsc">
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<td><code>size_type</code></td>
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<td>实现定义</td>
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</tr>
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<tr class="t-dsc">
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<td><code>difference_type</code></td>
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<td>实现定义</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-vector_bool-reference.html"><span class="t-lines"><span>reference</span></span></a></div>
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</div>
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</td>
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<td>表示到单个 bool 的引用的代理类<br />
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<span class="t-mark">(类)</span></td>
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</tr>
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<tr class="t-dsc">
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<td><code>const_reference</code></td>
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<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">bool</span></span></span></td>
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</tr>
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<tr class="t-dsc">
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<td><code>pointer</code></td>
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<td>实现定义</td>
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</tr>
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<tr class="t-dsc">
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<td><code>const_pointer</code></td>
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<td>实现定义</td>
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</tr>
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<tr class="t-dsc">
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<td><code>iterator</code></td>
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<td>
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<table class="t-rev-begin t-rev-begin-noborder">
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<tr class="t-rev t-until-cxx20">
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<td>
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<p>实现定义</p>
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</td>
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<td><span class="t-mark-rev t-until-cxx20">(C++20 前)</span></td>
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</tr>
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<tr class="t-rev t-since-cxx20">
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<td>
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<p>实现定义的<a href="cpp-named_req-ConstexprIterator.html"><span style="font-style:italic">常量表达式迭代器</span> <span style="font-family: Georgia, 'DejaVu Serif', serif; font-style:italic">(ConstexprIterator)</span></a></p>
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</td>
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<td><span class="t-mark-rev t-since-cxx20">(C++20 起)</span></td>
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</tr>
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</table>
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</td>
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</tr>
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<tr class="t-dsc">
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<td><code>const_iterator</code></td>
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<td>
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<table class="t-rev-begin t-rev-begin-noborder">
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<tr class="t-rev t-until-cxx20">
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<td>
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<p>实现定义</p>
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</td>
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<td><span class="t-mark-rev t-until-cxx20">(C++20 前)</span></td>
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</tr>
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<tr class="t-rev t-since-cxx20">
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<td>
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<p>实现定义的<a href="cpp-named_req-ConstexprIterator.html"><span style="font-style:italic">常量表达式迭代器</span> <span style="font-family: Georgia, 'DejaVu Serif', serif; font-style:italic">(ConstexprIterator)</span></a></p>
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</td>
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<td><span class="t-mark-rev t-since-cxx20">(C++20 起)</span></td>
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</tr>
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</table>
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</td>
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</tr>
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<tr class="t-dsc">
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<td><code>reverse_iterator</code></td>
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<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-iterator-reverse_iterator.html"><span class="kw658">std::<span class="me2">reverse_iterator</span></span></a><span class="sy1"><</span>iterator<span class="sy1">></span></span></span></td>
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</tr>
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<tr class="t-dsc">
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<td><code>const_reverse_iterator</code></td>
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<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-iterator-reverse_iterator.html"><span class="kw658">std::<span class="me2">reverse_iterator</span></span></a><span class="sy1"><</span>const_iterator<span class="sy1">></span></span></span></td>
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</tr>
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</table>
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<h3><span class="mw-headline" id=".E6.88.90.E5.91.98.E5.87.BD.E6.95.B0">成员函数</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 t-dsc-member-nobold-div">
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<div><a href="cpp-container-vector-vector.html"><span class="t-lines"><span>(构造函数)</span></span></a></div>
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</div>
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</td>
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<td>构造 <code>vector</code><br />
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<span class="t-mark">(<code>std::vector<T,Allocator></code> 的公开成员函数)</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 t-dsc-member-nobold-div">
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<div><a href="cpp-container-vector-~vector.html"><span class="t-lines"><span>(析构函数)</span></span></a></div>
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</div>
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</td>
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<td>析构 <code>vector</code><br />
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<span class="t-mark">(<code>std::vector<T,Allocator></code> 的公开成员函数)</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-vector-operator=.html"><span class="t-lines"><span>operator=</span></span></a></div>
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</div>
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</td>
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<td>赋值给容器<br />
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<span class="t-mark">(<code>std::vector<T,Allocator></code> 的公开成员函数)</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-vector-assign.html"><span class="t-lines"><span>assign</span></span></a></div>
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</div>
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</td>
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<td>将值赋给容器<br />
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<span class="t-mark">(<code>std::vector<T,Allocator></code> 的公开成员函数)</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-vector-get_allocator.html"><span class="t-lines"><span>get_allocator</span></span></a></div>
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</div>
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</td>
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<td>返回相关的分配器<br />
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<span class="t-mark">(<code>std::vector<T,Allocator></code> 的公开成员函数)</span></td>
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</tr>
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<tr>
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<td colspan="2">
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<h5><span class="mw-headline" id=".E5.85.83.E7.B4.A0.E8.AE.BF.E9.97.AE">元素访问</span></h5>
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</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-vector-at.html"><span class="t-lines"><span>at</span></span></a></div>
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</div>
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</td>
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<td>访问指定的元素，同时进行越界检查<br />
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<span class="t-mark">(<code>std::vector<T,Allocator></code> 的公开成员函数)</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-vector-operator_at.html"><span class="t-lines"><span>operator[]</span></span></a></div>
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</div>
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</td>
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<td>访问指定的元素<br />
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<span class="t-mark">(<code>std::vector<T,Allocator></code> 的公开成员函数)</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-vector-front.html"><span class="t-lines"><span>front</span></span></a></div>
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</div>
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</td>
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<td>访问第一个元素<br />
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<span class="t-mark">(<code>std::vector<T,Allocator></code> 的公开成员函数)</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-vector-back.html"><span class="t-lines"><span>back</span></span></a></div>
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</div>
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</td>
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<td>访问最后一个元素<br />
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<span class="t-mark">(<code>std::vector<T,Allocator></code> 的公开成员函数)</span></td>
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</tr>
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<tr>
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<td colspan="2">
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<h5><span class="mw-headline" id=".E8.BF.AD.E4.BB.A3.E5.99.A8">迭代器</span></h5>
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</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-vector-begin.html"><span class="t-lines"><span>begin</span> <span>cbegin</span></span></a></div>
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<div><span class="t-lines"><span></span><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>返回指向起始的迭代器<br />
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<span class="t-mark">(<code>std::vector<T,Allocator></code> 的公开成员函数)</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-vector-end.html"><span class="t-lines"><span>end</span> <span>cend</span></span></a></div>
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<div><span class="t-lines"><span></span><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>返回指向末尾的迭代器<br />
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<span class="t-mark">(<code>std::vector<T,Allocator></code> 的公开成员函数)</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-vector-rbegin.html"><span class="t-lines"><span>rbegin</span><span>crbegin</span></span></a></div>
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<div><span class="t-lines"><span></span><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>返回指向起始的逆向迭代器<br />
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<span class="t-mark">(<code>std::vector<T,Allocator></code> 的公开成员函数)</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-vector-rend.html"><span class="t-lines"><span>rend</span><span>crend</span></span></a></div>
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<div><span class="t-lines"><span></span><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>返回指向末尾的逆向迭代器<br />
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<span class="t-mark">(<code>std::vector<T,Allocator></code> 的公开成员函数)</span></td>
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</tr>
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<tr>
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<td colspan="2">
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<h5><span class="mw-headline" id=".E5.AE.B9.E5.99.A8">容器</span></h5>
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</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-vector-empty.html"><span class="t-lines"><span>empty</span></span></a></div>
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</div>
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</td>
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<td>检查容器是否为空<br />
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<span class="t-mark">(<code>std::vector<T,Allocator></code> 的公开成员函数)</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-vector-size.html"><span class="t-lines"><span>size</span></span></a></div>
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</div>
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</td>
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<td>返回容纳的元素数<br />
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<span class="t-mark">(<code>std::vector<T,Allocator></code> 的公开成员函数)</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-vector-max_size.html"><span class="t-lines"><span>max_size</span></span></a></div>
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</div>
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</td>
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<td>返回可容纳的最大元素数<br />
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<span class="t-mark">(<code>std::vector<T,Allocator></code> 的公开成员函数)</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-vector-reserve.html"><span class="t-lines"><span>reserve</span></span></a></div>
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</div>
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</td>
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<td>预留存储空间<br />
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<span class="t-mark">(<code>std::vector<T,Allocator></code> 的公开成员函数)</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-vector-capacity.html"><span class="t-lines"><span>capacity</span></span></a></div>
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</div>
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</td>
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<td>返回当前存储空间能够容纳的元素数<br />
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<span class="t-mark">(<code>std::vector<T,Allocator></code> 的公开成员函数)</span></td>
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</tr>
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<tr>
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<td colspan="2">
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<h5><span class="mw-headline" id=".E4.BF.AE.E6.94.B9.E5.99.A8">修改器</span></h5>
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</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-vector-clear.html"><span class="t-lines"><span>clear</span></span></a></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">(<code>std::vector<T,Allocator></code> 的公开成员函数)</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-vector-insert.html"><span class="t-lines"><span>insert</span></span></a></div>
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</div>
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</td>
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<td>插入元素<br />
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<span class="t-mark">(<code>std::vector<T,Allocator></code> 的公开成员函数)</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-vector-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-cxx14">(C++14 起)</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">(<code>std::vector<T,Allocator></code> 的公开成员函数)</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-vector-erase.html"><span class="t-lines"><span>erase</span></span></a></div>
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|
</div>
|
|
</td>
|
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<td>擦除元素<br />
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|
<span class="t-mark">(<code>std::vector<T,Allocator></code> 的公开成员函数)</span></td>
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|
</tr>
|
|
<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-vector-push_back.html"><span class="t-lines"><span>push_back</span></span></a></div>
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|
</div>
|
|
</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">(<code>std::vector<T,Allocator></code> 的公开成员函数)</span></td>
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|
</tr>
|
|
<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-vector-emplace_back.html"><span class="t-lines"><span>emplace_back</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx14">(C++14)</span></span></span></div>
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</div>
|
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</td>
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<td>在末尾原位构造元素<br />
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<span class="t-mark">(<code>std::vector<T,Allocator></code> 的公开成员函数)</span></td>
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|
</tr>
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
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<div><a href="cpp-container-vector-pop_back.html"><span class="t-lines"><span>pop_back</span></span></a></div>
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|
</div>
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</td>
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<td>移除末元素<br />
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|
<span class="t-mark">(<code>std::vector<T,Allocator></code> 的公开成员函数)</span></td>
|
|
</tr>
|
|
<tr class="t-dsc">
|
|
<td>
|
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<div class="t-dsc-member-div">
|
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<div><a href="cpp-container-vector-resize.html"><span class="t-lines"><span>resize</span></span></a></div>
|
|
</div>
|
|
</td>
|
|
<td>改变容器中可存储元素的个数<br />
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<span class="t-mark">(<code>std::vector<T,Allocator></code> 的公开成员函数)</span></td>
|
|
</tr>
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
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<div><a href="cpp-container-vector-swap.html"><span class="t-lines"><span>swap</span></span></a></div>
|
|
</div>
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|
</td>
|
|
<td>交换内容<br />
|
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<span class="t-mark">(<code>std::vector<T,Allocator></code> 的公开成员函数)</span></td>
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|
</tr>
|
|
<tr>
|
|
<td colspan="2">
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|
<h5><span class="mw-headline" id="vector.3Cbool.3E_.E7.89.B9.E5.AE.9A.E4.BF.AE.E6.94.B9.E5.99.A8"><code>vector<bool></code> 特定修改器</span></h5>
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</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">
|
|
<div><a href="cpp-container-vector_bool-flip.html"><span class="t-lines"><span>flip</span></span></a></div>
|
|
</div>
|
|
</td>
|
|
<td>翻转所有位<br />
|
|
<span class="t-mark">(公开成员函数)</span></td>
|
|
</tr>
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="cpp-container-vector_bool-swap.html"><span class="t-lines"><span>swap</span></span></a></div>
|
|
<div><span class="t-lines"><span><span class="t-cmark">[静态]</span></span></span></div>
|
|
</div>
|
|
</td>
|
|
<td>交换二个 <code>std::vector<bool>::reference</code><br />
|
|
<span class="t-mark">(公开静态成员函数)</span></td>
|
|
</tr>
|
|
</table>
|
|
<h3><span class="mw-headline" id=".E9.9D.9E.E6.88.90.E5.91.98.E5.87.BD.E6.95.B0">非成员函数</span></h3>
|
|
<table class="t-dsc-begin">
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="cpp-container-vector-operator_cmp.html"><span class="t-lines"><span>operator==</span><span>operator!=</span><span>operator<</span><span>operator<=</span><span>operator></span><span>operator>=</span><span>operator<=></span></span></a></div>
|
|
<div><span class="t-lines"><span></span><span><span class="t-mark-rev t-until-cxx20">(C++20 中移除)</span></span><span><span class="t-mark-rev t-until-cxx20">(C++20 中移除)</span></span><span><span class="t-mark-rev t-until-cxx20">(C++20 中移除)</span></span><span><span class="t-mark-rev t-until-cxx20">(C++20 中移除)</span></span><span><span class="t-mark-rev t-until-cxx20">(C++20 中移除)</span></span><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
|
|
</div>
|
|
</td>
|
|
<td>按照字典顺序比较 vector 中的值<br />
|
|
<span class="t-mark">(函数模板)</span></td>
|
|
</tr>
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="cpp-container-vector-swap2.html"><span class="t-lines"><span>std::swap<span class="t-dsc-small">(std::vector)</span></span></span></a></div>
|
|
</div>
|
|
</td>
|
|
<td>特化 <span class="t-lc"><a href="cpp-algorithm-swap.html">std::swap</a></span> 算法<br />
|
|
<span class="t-mark">(函数模板)</span></td>
|
|
</tr>
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="cpp-container-vector-erase2.html"><span class="t-lines"><span>erase<span class="t-dsc-small">(std::vector)</span></span><span>erase_if<span class="t-dsc-small">(std::vector)</span></span></span></a></div>
|
|
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
|
|
</div>
|
|
</td>
|
|
<td>擦除所有满足特定判别标准的元素<br />
|
|
<span class="t-mark">(函数模板)</span></td>
|
|
</tr>
|
|
</table>
|
|
<h3><span class="mw-headline" id=".E8.BE.85.E5.8A.A9.E7.B1.BB">辅助类</span></h3>
|
|
<table class="t-dsc-begin">
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="cpp-container-vector_bool-hash.html"><span class="t-lines"><span>std::hash<span class="t-dsc-small"><std::vector<bool>></span></span></span></a></div>
|
|
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
|
|
</div>
|
|
</td>
|
|
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-container-vector.html"><span class="kw1269">std::<span class="me2">vector</span></span></a><span class="sy1"><</span><span class="kw4">bool</span><span class="sy1">></span></span></span> 的哈希支持<br />
|
|
<span class="t-mark">(类模板特化)</span></td>
|
|
</tr>
|
|
</table>
|
|
<h3><span class="mw-headline" id=".E6.8E.A8.E5.AF.BC.E6.8C.87.E5.BC.95.28C.2B.2B17.29"><a href="cpp-container-vector-deduction_guides.html">推导指引</a><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></h3>
|
|
<h3><span class="mw-headline" id=".E6.B3.A8.E8.A7.A3">注解</span></h3>
|
|
<p>若位集的大小在编译时已知，可使用 <span class="t-lc"><a href="cpp-utility-bitset.html">std::bitset</a></span> ，它提供一组更丰富的成员函数。另外， <a rel="nofollow" class="external text" href="http://www.boost.org/doc/libs/release/libs/dynamic_bitset/dynamic_bitset.html">boost::dynamic_bitset</a> 作为 <code>std::vector<bool></code> 的替用者存在。</p>
|
|
<p>因为 <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-container-vector.html"><span class="kw1269">std::<span class="me2">vector</span></span></a><span class="sy1"><</span><span class="kw4">bool</span><span class="sy1">></span></span></span> 的表示可以优化，故它不需要满足所有<a href="cpp-named_req-Container.html"><span style="font-style:italic">容器</span> <span style="font-family: Georgia, 'DejaVu Serif', serif; font-style:italic">(Container)</span></a> 或<a href="cpp-named_req-SequenceContainer.html"><span style="font-style:italic">序列容器</span> <span style="font-family: Georgia, 'DejaVu Serif', serif; font-style:italic">(SequenceContainer)</span></a> 要求。例如，因为 <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-container-vector.html"><span class="kw1269">std::<span class="me2">vector</span></span></a><span class="sy1"><</span><span class="kw4">bool</span><span class="sy1">></span><span class="sy4">::</span><span class="me2">iterator</span></span></span> 是实现定义的，故它可以不满足<a href="cpp-named_req-ForwardIterator.html"><span style="font-style:italic">老式向前迭代器</span> <span style="font-family: Georgia, 'DejaVu Serif', serif; font-style:italic">(LegacyForwardIterator)</span></a> 要求。使用要求<a href="cpp-named_req-ForwardIterator.html"><span style="font-style:italic">老式向前迭代器</span> <span style="font-family: Georgia, 'DejaVu Serif', serif; font-style:italic">(LegacyForwardIterator)</span></a> 的算法，例如 <span class="t-lc"><a href="cpp-algorithm-search.html">std::search</a></span> 可能导致<a rel="nofollow" class="external text" href="http://www.boost.org/doc/libs/1_69_0/libs/dynamic_bitset/dynamic_bitset.html#rationale">编译时或运行时错误</a>。</p>
|
|
<p><a rel="nofollow" class="external text" href="https://www.boost.org/doc/libs/1_69_0/doc/html/boost/container/vector.html"><code>vector</code> 的 Boost.Container 版本</a>不对 <code>bool</code> 特化。</p>
|
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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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