85 lines
4.7 KiB
HTML
85 lines
4.7 KiB
HTML
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<title>std::basic_ios<CharT,Traits>::basic_ios</title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_io_basic_ios_basic_ios skin-cppreference2 action-view cpp-navbar">
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::basic_ios<CharT,Traits>::</span>basic_ios</h1>
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<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-io.html">io</a>‎ | <a href="cpp-io-basic_ios.html">basic ios</a></span></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">protected</span><span class="sy4">:</span><br />
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basic_ios<span class="br0">(</span><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">public</span><span class="sy4">:</span><br />
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<span class="kw1">explicit</span> basic_ios<span class="br0">(</span> <a href="cpp-io-basic_streambuf.html"><span class="kw1666">std::<span class="me2">basic_streambuf</span></span></a><span class="sy1"><</span>CharT,Traits<span class="sy1">></span><span class="sy2">*</span> sb <span class="br0">)</span><span class="sy4">;</span></span></div>
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<td rowspan="142">(3)</td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">private</span><span class="sy4">:</span><br />
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basic_ios<span class="br0">(</span><span class="kw4">const</span> basic_ios<span class="sy3">&</span><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"><span class="kw1">public</span><span class="sy4">:</span><br />
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basic_ios<span class="br0">(</span><span class="kw4">const</span> basic_ios<span class="sy3">&</span> <span class="br0">)</span> <span class="sy1">=</span> delete<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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<p>构造新的 <code>basic_ios</code> 对象。</p>
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<div class="t-li1"><span class="t-li">1)</span> 默认构造函数。不初始化内部状态。必须在首次使用对象或析构函数前调用 <span class="t-lc"><a href="cpp-io-basic_ios-init.html">init()</a></span> ，否则行为未定义。</div>
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<div class="t-li1"><span class="t-li">2)</span> 以调用<span class="t-c"><span class="mw-geshi cpp source-cpp">init<span class="br0">(</span>sb<span class="br0">)</span></span></span> 初始化内部状态。设置关联流缓冲为 <code>sb</code> 。</div>
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<div class="t-li1"><span class="t-li">3)</span> C++11 前复制构造函数声明为 <code>private:</code> 且不定义，而在 C++11 中声明为被删除： I/O 流非<a href="cpp-named_req-CopyConstructible.html"><span style="font-style:italic">可复制构造</span> <span style="font-family: Georgia, 'DejaVu Serif', serif; font-style:italic">(CopyConstructible)</span></a> 。</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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<td>sb</td>
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<td>-</td>
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<td>要关联的流缓冲</td>
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