80 lines
4.2 KiB
HTML
80 lines
4.2 KiB
HTML
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<title>std::char_traits<CharT>::not_eof</title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_string_char_traits_not_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>not_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 not_eof<span class="br0">(</span> int_type e <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 not_eof<span class="br0">(</span> int_type e <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>检查 <code>e</code> 是否不等价于 <i>eof</i> 值。</p>
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<p>正式而言</p>
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<ul>
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<li>若 <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">eof</span><span class="br0">(</span><span class="br0">)</span><span class="br0">)</span></span></span> 为 <code>true</code> ，则返回 <code>e</code></li>
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<li>否则，返回满足 <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>f, X<span class="sy4">::</span><span class="me2">eof</span><span class="br0">(</span><span class="br0">)</span><span class="br0">)</span></span></span> 为 <code>false</code> 的 <span class="t-c"><span class="mw-geshi cpp source-cpp">f</span></span></li>
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</ul>
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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>e</td>
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<td>-</td>
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<td>要分析的值</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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<p>若 <code>e</code> 与 <i>eof</i> 不等价则返回 <code>e</code> ，否则返回某些其他非 eof 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><a href="cpp-string-char_traits-eof.html"><span class="t-lines"><span>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>
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<td>返回一个 <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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