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<title>std::ranges::take_while_view<V,Pred>::sentinel<Const>::sentinel</title>
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::ranges::take_while_view<V,Pred>::<i>sentinel</i><Const>::</span><i>sentinel</i></h1>
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<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-ranges.html">ranges</a>‎ | <a href="cpp-ranges-take_while_view.html">take while view</a>‎ | <a href="cpp-ranges-take_while_view-sentinel.html">sentinel</a></span></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="coMULTI">/*sentinel*/</span><span class="br0">(</span><span class="br0">)</span> <span class="sy1">=</span> <span class="kw1">default</span><span class="sy4">;</span></span></div>
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<td>(1)</td>
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<td><span class="t-mark-rev t-since-cxx20">(C++20 起)</span></td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">constexpr</span> <span class="kw1">explicit</span> <span class="coMULTI">/*sentinel*/</span><span class="br0">(</span> ranges<span class="sy4">::</span><span class="me2">sentinel_t</span><span class="sy1"><</span>Base<span class="sy1">></span> end, <span class="kw4">const</span> Pred<span class="sy2">*</span> pred <span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(2)</td>
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<td><span class="t-mark-rev t-since-cxx20">(C++20 起)</span></td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">constexpr</span> <span class="coMULTI">/*sentinel*/</span><span class="br0">(</span> <span class="coMULTI">/*sentinel*/</span><span class="sy1"><</span><span class="sy3">!</span>Const<span class="sy1">></span> s <span class="br0">)</span><br /></span>
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<p> requires Const <span class="sy3">&&</span><br /></p>
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std<span class="sy4">::</span><span class="me2">convertible_to</span><span class="sy1"><</span>ranges<span class="sy4">::</span><span class="me2">sentinel_t</span><span class="sy1"><</span>V<span class="sy1">></span>, ranges<span class="sy4">::</span><span class="me2">sentinel_t</span><span class="sy1"><</span>Base<span class="sy1">>></span><span class="sy4">;</span></div>
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<td>(3)</td>
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<td><span class="t-mark-rev t-since-cxx20">(C++20 起)</span></td>
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<p>构造哨位。</p>
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<div class="t-li1"><span class="t-li">1)</span> 默认构造函数。<a href="cpp-language-value_initialization.html">值初始化</a>底层哨位和指向谓词的指针。</div>
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<div class="t-li1"><span class="t-li">2)</span> 以 <code>end</code> 初始化底层哨位并以 <code>pred</code> 初始化指向谓词的指针。</div>
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<div class="t-li1"><span class="t-li">3)</span> 从 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="coMULTI">/*sentinel*/</span><span class="sy1"><</span><span class="kw2">false</span><span class="sy1">></span></span></span> 转换到 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="coMULTI">/*sentinel*/</span><span class="sy1"><</span><span class="kw2">true</span><span class="sy1">></span></span></span> 。复制构造对应的成员。</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>end</td>
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<td>-</td>
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<td>表示（可能为 const 限定的） <code>V</code> 末尾的哨位</td>
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<td>pred</td>
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<td>-</td>
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<td>指向谓词的指针</td>
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<td>i</td>
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<td>-</td>
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<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="coMULTI">/*sentinel*/</span><span class="sy1"><</span><span class="kw2">false</span><span class="sy1">></span></span></span></td>
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<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">示例</span></h3>
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<td class="mbox-text" style="">本节未完成<br />
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原因：暂无示例</td>
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