62 lines
3.2 KiB
HTML
62 lines
3.2 KiB
HTML
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<title>std::constructible_from</title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_concepts_constructible_from 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::</span>constructible_from</h1>
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<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-concepts.html">concepts</a></span></div>
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<div>定义于头文件 <code><a href="cpp-header-concepts.html"><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>... <span class="me1">Args</span> <span class="sy1">></span><br /></span>
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<p>concept constructible_from <span class="sy1">=</span><br /></p>
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std<span class="sy4">::</span><span class="me2">destructible</span><span class="sy1"><</span>T<span class="sy1">></span> <span class="sy3">&&</span> <a href="cpp-types-is_constructible.html"><span class="kw521">std::<span class="me2">is_constructible_v</span></span></a><span class="sy1"><</span>T, Args...<span class="sy1">></span><span class="sy4">;</span></div>
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<td><span class="t-mark-rev t-since-cxx20">(C++20 起)</span></td>
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<p><code>constructible_from</code> 概念指定 <code>T</code> 类型变量能以给定的参数类型集 <code>Args...</code> 初始化。</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_constructible.html"><span class="t-lines"><span>is_constructible</span><span>is_trivially_constructible</span><span>is_nothrow_constructible</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><span class="t-mark-rev t-since-cxx11">(C++11)</span></span><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
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</td>
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<td>检查类型是否带有针对特定实参的构造函数<br />
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<span class="t-mark">(类模板)</span></td>
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