81 lines
5.6 KiB
HTML
81 lines
5.6 KiB
HTML
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<title>operator-(std::move_iterator<Iter>, std::move_sentinel)</title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_iterator_move_iterator_operator-2 skin-cppreference2 action-view cpp-navbar">
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<h1 id="firstHeading" class="firstHeading">operator-<small>(std::move_iterator<Iter>, std::move_sentinel)</small></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-iterator.html">iterator</a>‎ | <a href="cpp-iterator-move_iterator.html">move iterator</a></span></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1"><</span>std<span class="sy4">::</span><span class="me2">sized_sentinel_for</span><span class="sy1"><</span>Iter<span class="sy1">></span> S<span class="sy1">></span><br /></span>
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<p> <span class="kw1">friend</span> <span class="kw4">constexpr</span> std<span class="sy4">::</span><span class="me2">iter_difference_t</span><span class="sy1"><</span>Iter<span class="sy1">></span><br /></p>
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operator<span class="sy2">-</span><span class="br0">(</span><span class="kw4">const</span> std<span class="sy4">::</span><span class="me2">move_sentinel</span><span class="sy1"><</span>S<span class="sy1">></span><span class="sy3">&</span> s, <span class="kw4">const</span> move_iterator<span class="sy3">&</span> i<span class="br0">)</span><span class="sy4">;</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="kw1">template</span><span class="sy1"><</span>std<span class="sy4">::</span><span class="me2">sized_sentinel_for</span><span class="sy1"><</span>Iter<span class="sy1">></span> S<span class="sy1">></span><br /></span>
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<p> <span class="kw1">friend</span> <span class="kw4">constexpr</span> std<span class="sy4">::</span><span class="me2">iter_difference_t</span><span class="sy1"><</span>Iter<span class="sy1">></span><br /></p>
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operator<span class="sy2">-</span><span class="br0">(</span><span class="kw4">const</span> move_iterator<span class="sy3">&</span> i, <span class="kw4">const</span> std<span class="sy4">::</span><span class="me2">move_sentinel</span><span class="sy1"><</span>S<span class="sy1">></span><span class="sy3">&</span> s<span class="br0">)</span><span class="sy4">;</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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<td></td>
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<td></td>
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<td></td>
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<p>返回 <code>move_iterator</code> 与 <code>move_sentinel</code> 间的距离。</p>
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<p>这些函数模板对通常<a href="cpp-language-unqualified_lookup.html">无限定</a>或<a href="cpp-language-qualified_lookup.html">有限定查找</a>不可见，而只能在 <code>std::move_iterator<Iter></code> 为参数的关联类时由<a href="cpp-language-adl.html">实参依赖查找</a>找到。</p>
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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>i</td>
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<td>-</td>
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<td><code>std::move_iterator<Iter></code></td>
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<tr class="t-par">
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<td>s</td>
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<td>-</td>
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<td><code>std::move_sentinel<S></code> ，其中 <code>S</code> 实现 <code>std::sized_sentinel_for<Iter></code></td>
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<h3><span class="mw-headline" id=".E8.BF.94.E5.9B.9E.E5.80.BC">返回值</span></h3>
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<div class="t-li1"><span class="t-li">1)</span> <span class="t-c"><span class="mw-geshi cpp source-cpp">s.<span class="me1">base</span><span class="br0">(</span><span class="br0">)</span> <span class="sy2">-</span> i.<span class="me1">base</span><span class="br0">(</span><span class="br0">)</span></span></span></div>
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<div class="t-li1"><span class="t-li">2)</span> <span class="t-c"><span class="mw-geshi cpp source-cpp">i.<span class="me1">base</span><span class="br0">(</span><span class="br0">)</span> <span class="sy2">-</span> s.<span class="me1">base</span><span class="br0">(</span><span class="br0">)</span></span></span></div>
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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-move_iterator-operator-.html"><span class="t-lines"><span>operator-</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>计算两个迭代器适配器间的距离<br />
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<span class="t-mark">(函数模板)</span></td>
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