70 lines
3.7 KiB
HTML
70 lines
3.7 KiB
HTML
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<title>std::char_traits<CharT>::eof</title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_string_char_traits_eof 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::char_traits<CharT>::</span>eof</h1>
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<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-string.html">string</a>‎ | <a href="cpp-string-char_traits.html">char traits</a></span></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">static</span> int_type eof<span class="br0">(</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="kw4">static</span> <span class="kw4">constexpr</span> int_type eof<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</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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<p>返回不等价于任何 <code>char_type</code> 合法值的值。</p>
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<p>正式而言，返回的值 <span class="t-c"><span class="mw-geshi cpp source-cpp">e</span></span> 满足 <span class="t-c"><span class="mw-geshi cpp source-cpp">X<span class="sy4">::</span><span class="me2">eq_int_type</span><span class="br0">(</span>e, X<span class="sy4">::</span><span class="me2">to_int_type</span><span class="br0">(</span>c<span class="br0">)</span><span class="br0">)</span></span></span> 对于所有 <span class="t-c"><span class="mw-geshi cpp source-cpp">c</span></span> 为 <code>false</code> 。</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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<p>（无）</p>
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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>不等于任何 <code>char_type</code> 合法值的值。</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>常数。</p>
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<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">参阅</span></h3>
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<div class="t-dsc-member-div">
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<div><a href="cpp-string-char_traits-not_eof.html"><span class="t-lines"><span>not_eof</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-cmark">[静态]</span></span></span></div>
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<td>检查字符是否为 <i>eof</i> 值<br />
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<span class="t-mark">(公开静态成员函数)</span></td>
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