56 lines
4.5 KiB
HTML
56 lines
4.5 KiB
HTML
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_ranges_contiguous_range 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::ranges::</span>contiguous_range</h1>
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<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-ranges.html">ranges</a></span></div>
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<div>定义于头文件 <code><a href="cpp-header-ranges.html"><ranges></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="sy1">></span><br /></span>
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<p> concept contiguous_range <span class="sy1">=</span><br />
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ranges<span class="sy4">::</span><span class="me2">random_access_range</span><span class="sy1"><</span>T<span class="sy1">></span> <span class="sy3">&&</span><br />
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std<span class="sy4">::</span><span class="me2">contiguous_iterator</span><span class="sy1"><</span>ranges<span class="sy4">::</span><span class="me2">iterator_t</span><span class="sy1"><</span>T<span class="sy1">>></span> <span class="sy3">&&</span><br />
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requires<span class="br0">(</span>T<span class="sy3">&</span> t<span class="br0">)</span> <span class="br0">{</span><br />
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<span class="br0">{</span> ranges<span class="sy4">::</span><span class="me2">data</span><span class="br0">(</span>t<span class="br0">)</span> <span class="br0">}</span> <span class="sy2">-</span><span class="sy1">></span><br />
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std<span class="sy4">::</span><span class="me2">same_as</span><span class="sy1"><</span><a href="cpp-types-add_pointer.html"><span class="kw615">std::<span class="me2">add_pointer_t</span></span></a><span class="sy1"><</span>ranges<span class="sy4">::</span><span class="me2">range_reference_t</span><span class="sy1"><</span>T<span class="sy1">>>></span><span class="sy4">;</span><br /></p>
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<span class="br0">}</span><span class="sy4">;</span></div>
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<p><span class="t-c"><span class="mw-geshi cpp source-cpp">contiguous_range</span></span> 概念是 <a href="cpp-ranges-range.html"><code>range</code></a> 的细化，对于实现的类型， <span class="t-lc">ranges::begin</span> 返回 <a href="cpp-iterator-contiguous_iterator.html"><code>contiguous_iterator</code></a> 的实现，且定制点 <span class="t-c"><span class="mw-geshi cpp source-cpp">ranges<span class="sy4">::</span><span class="me2">data</span></span></span> 可用。</p>
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<h3><span class="mw-headline" id=".E8.AF.AD.E4.B9.89.E8.A6.81.E6.B1.82">语义要求</span></h3>
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<p><code>T</code> 实现 <span class="t-c"><span class="mw-geshi cpp source-cpp">contiguous_range</span></span> ，仅若给定使得 <code>decltype((e))</code> 为 <code>T&</code> 的表达式 <code>e</code> ， <span class="t-c"><span class="mw-geshi cpp source-cpp">std<span class="sy4">::</span><span class="me2">to_address</span><span class="br0">(</span>ranges<span class="sy4">::</span><span class="me2">begin</span><span class="br0">(</span>t<span class="br0">)</span><span class="br0">)</span> <span class="sy1">==</span> ranges<span class="sy4">::</span><span class="me2">data</span><span class="br0">(</span>t<span class="br0">)</span></span></span> 。</p>
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