65 lines
4.2 KiB
HTML
65 lines
4.2 KiB
HTML
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<title>std::experimental::ranges::Same</title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_experimental_ranges_concepts_Same 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::experimental::ranges::</span>Same</h1>
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<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-experimental.html">experimental</a>‎ | <a href="cpp-experimental-ranges.html">ranges</a></span></div>
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<div>定义于头文件 <code><a href="cpp-header-experimental-ranges-concepts.html"><experimental/ranges/concepts></a></code></div>
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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> T, <span class="kw1">class</span> U <span class="sy1">></span><br />
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concept <span class="kw4">bool</span> Same <span class="sy1">=</span> <a href="cpp-types-is_same.html"><span class="kw588">std::<span class="me2">is_same</span></span></a><span class="sy1"><</span>T, U<span class="sy1">></span><span class="sy4">::</span><span class="me2">value</span><span class="sy4">;</span> <span class="co1">// 见后方</span></span></div>
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<td><span class="t-mark-rev t-since-ranges-ts t-mark-ts">(范围 TS)</span></td>
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<p>概念 <code>Same<T, U></code> 若且唯若 <code>T</code> 与 <code>U</code> 代表同一类型才得到满足。</p>
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<p>无关乎说明使用， <span class="t-c"><span class="mw-geshi cpp source-cpp">Same<span class="sy1"><</span>T, U<span class="sy1">></span></span></span> 与 <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-types-is_same.html"><span class="kw588">std::<span class="me2">is_same</span></span></a><span class="sy1"><</span>T, U<span class="sy1">></span><span class="sy4">::</span><span class="me2">value</span></span></span> 间不必有蕴含关系。</p>
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<p>为制约检查的目的， <span class="t-c"><span class="mw-geshi cpp source-cpp">Same<span class="sy1"><</span>T, U<span class="sy1">></span></span></span> 隐含 <span class="t-c"><span class="mw-geshi cpp source-cpp">Same<span class="sy1"><</span>U, T<span class="sy1">></span></span></span> 。</p>
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<h3><span class="mw-headline" id=".E6.B3.A8.E6.84.8F">注意</span></h3>
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<p><code>Same</code> 的制约检查上的额外要求与 <span class="t-lc"><a href="cpp-types-is_same.html">std::is_same</a></span> 相异。</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-types-is_same.html"><span class="t-lines"><span>is_same</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
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<td>检查两个类型是否相同<br />
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<span class="t-mark">(类模板)</span></td>
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