131 lines
10 KiB
HTML
131 lines
10 KiB
HTML
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<title>std::ranges::iterator_t, std::ranges::sentinel_t, std::ranges::range_size_t, std::ranges::range_difference_t, std::ranges::range_value_t, std::ranges::range_reference_t, std::ranges::range_rvalue_reference_t</title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_ranges_iterator_t 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>iterator_t, <span style="font-size:0.7em; line-height:130%">std::ranges::</span>sentinel_t, <span style="font-size:0.7em; line-height:130%">std::ranges::</span>range_size_t, <span style="font-size:0.7em; line-height:130%">std::ranges::</span>range_difference_t, <span style="font-size:0.7em; line-height:130%">std::ranges::</span>range_value_t, <span style="font-size:0.7em; line-height:130%">std::ranges::</span>range_reference_t, <span style="font-size:0.7em; line-height:130%">std::ranges::</span>range_rvalue_reference_t</h1>
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<div id="bodyContent">
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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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</td>
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<td></td>
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<td></td>
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<tr class="t-dcl t-since-cxx20">
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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 />
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<span class="kw1">using</span> iterator_t <span class="sy1">=</span> decltype<span class="br0">(</span>ranges<span class="sy4">::</span><span class="me2">begin</span><span class="br0">(</span><a href="cpp-utility-declval.html"><span class="kw1120">std::<span class="me2">declval</span></span></a><span class="sy1"><</span>T<span class="sy3">&</span><span class="sy1">></span><span class="br0">(</span><span class="br0">)</span><span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span></span></div>
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</td>
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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="kw1">template</span> <span class="sy1"><</span>ranges<span class="sy4">::</span><span class="me2">range</span> R<span class="sy1">></span><br />
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<span class="kw1">using</span> sentinel_t <span class="sy1">=</span> decltype<span class="br0">(</span>ranges<span class="sy4">::</span><span class="me2">end</span><span class="br0">(</span><a href="cpp-utility-declval.html"><span class="kw1120">std::<span class="me2">declval</span></span></a><span class="sy1"><</span>R<span class="sy3">&</span><span class="sy1">></span><span class="br0">(</span><span class="br0">)</span><span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span></span></div>
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</td>
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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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</tr>
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<tr class="t-dcl t-since-cxx20">
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span> <span class="sy1"><</span>ranges<span class="sy4">::</span><span class="me2">sized_range</span> R<span class="sy1">></span><br />
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<span class="kw1">using</span> range_size_t <span class="sy1">=</span> decltype<span class="br0">(</span>ranges<span class="sy4">::</span><span class="me2">size</span><span class="br0">(</span><a href="cpp-utility-declval.html"><span class="kw1120">std::<span class="me2">declval</span></span></a><span class="sy1"><</span>R<span class="sy3">&</span><span class="sy1">></span><span class="br0">(</span><span class="br0">)</span><span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span></span></div>
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</td>
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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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</tr>
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<tr class="t-dcl t-since-cxx20">
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span> <span class="sy1"><</span>ranges<span class="sy4">::</span><span class="me2">range</span> R<span class="sy1">></span><br />
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<span class="kw1">using</span> range_difference_t <span class="sy1">=</span> std<span class="sy4">::</span><span class="me2">iter_difference_t</span><span class="sy1"><</span>ranges<span class="sy4">::</span><span class="me2">iterator_t</span><span class="sy1"><</span>R<span class="sy1">>></span><span class="sy4">;</span></span></div>
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</td>
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<td>(4)</td>
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<td><span class="t-mark-rev t-since-cxx20">(C++20 起)</span></td>
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</tr>
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<tr class="t-dcl t-since-cxx20">
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<td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span> <span class="sy1"><</span>ranges<span class="sy4">::</span><span class="me2">range</span> R<span class="sy1">></span><br />
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<span class="kw1">using</span> range_value_t <span class="sy1">=</span> std<span class="sy4">::</span><span class="me2">iter_value_t</span><span class="sy1"><</span>ranges<span class="sy4">::</span><span class="me2">iterator_t</span><span class="sy1"><</span>R<span class="sy1">>></span><span class="sy4">;</span></span></div>
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</td>
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<td>(5)</td>
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<td><span class="t-mark-rev t-since-cxx20">(C++20 起)</span></td>
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</tr>
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<tr class="t-dcl t-since-cxx20">
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<td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span> <span class="sy1"><</span>ranges<span class="sy4">::</span><span class="me2">range</span> R<span class="sy1">></span><br />
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<span class="kw1">using</span> range_reference_t <span class="sy1">=</span> std<span class="sy4">::</span><span class="me2">iter_reference_t</span><span class="sy1"><</span>ranges<span class="sy4">::</span><span class="me2">iterator_t</span><span class="sy1"><</span>R<span class="sy1">>></span><span class="sy4">;</span></span></div>
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</td>
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<td>(6)</td>
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<td><span class="t-mark-rev t-since-cxx20">(C++20 起)</span></td>
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</tr>
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<tr class="t-dcl t-since-cxx20">
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<td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span> <span class="sy1"><</span>ranges<span class="sy4">::</span><span class="me2">range</span> R<span class="sy1">></span><br /></span>
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<p><span class="kw1">using</span> range_rvalue_reference_t <span class="sy1">=</span><br /></p>
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std<span class="sy4">::</span><span class="me2">iter_rvalue_reference_t</span><span class="sy1"><</span>ranges<span class="sy4">::</span><span class="me2">iterator_t</span><span class="sy1"><</span>R<span class="sy1">>></span><span class="sy4">;</span></div>
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</td>
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<td>(7)</td>
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<td><span class="t-mark-rev t-since-cxx20">(C++20 起)</span></td>
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</tr>
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<tr class="t-dcl-sep">
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<td></td>
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<td></td>
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<td></td>
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<div class="t-li1"><span class="t-li">1)</span> 用于获得 <code>T</code> 的迭代器类型。</div>
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<div class="t-li1"><span class="t-li">2)</span> 用于获得 <a href="cpp-ranges-range.html"><code>range</code></a> 类型 <code>R</code> 的哨位类型。</div>
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<div class="t-li1"><span class="t-li">3)</span> 用于获得 <a href="cpp-ranges-sized_range.html"><code>sized_range</code></a> 类型 <code>R</code> 的大小类型。</div>
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<div class="t-li1"><span class="t-li">4)</span> 用于获得范围类型 <code>R</code> 的迭代器类型的差类型。</div>
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<div class="t-li1"><span class="t-li">5)</span> 用于获得范围类型 <code>R</code> 的迭代器类型的值类型。</div>
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<div class="t-li1"><span class="t-li">6)</span> 用于获得范围类型 <code>R</code> 的迭代器类型的引用类型。</div>
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<div class="t-li1"><span class="t-li">7)</span> 用于获得范围类型 <code>R</code> 的迭代器类型的右值引用类型。</div>
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<h3><span class="mw-headline" id=".E6.A8.A1.E6.9D.BF.E5.BD.A2.E5.8F.82">模板形参</span></h3>
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<table class="t-par-begin">
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<td>T</td>
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<td>-</td>
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<td>能用于 <span class="t-lc">std::ranges::begin</span> 的类型</td>
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</tr>
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<tr class="t-par">
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<td>R</td>
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<td>-</td>
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<td><a href="cpp-ranges-range.html"><code>range</code></a> 类型或 <a href="cpp-ranges-sized_range.html"><code>sized_range</code></a> 类型</td>
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<h3><span class="mw-headline" id=".E6.B3.A8.E8.A7.A3">注解</span></h3>
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<p><code>iterator_t</code> 能应用到非范围类型，例如未知边界数组。</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 class="t-dsc-member-div">
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<div><a href="cpp-iterator-iter_t.html"><span class="t-lines"><span>iter_value_t</span><span>iter_reference_t</span><span>iter_difference_t</span><span>iter_rvalue_reference_t</span><span>iter_common_reference_t</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
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</div>
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</td>
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<td>计算迭代器的关联类型<br />
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<span class="t-mark">(别名模板)</span></td>
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</tr>
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</table>
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</div>
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<div class="visualClear"></div>
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</div>
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</div>
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</div>
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