56 lines
4.9 KiB
HTML
56 lines
4.9 KiB
HTML
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<title>iter_move(ranges::transform_view::iterator)</title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_ranges_transform_view_iterator_iter_move skin-cppreference2 action-view cpp-navbar">
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<h1 id="firstHeading" class="firstHeading">iter_move<span style="font-size:0.7em; line-height:130%">(ranges::transform_view::<i>iterator</i>)</span></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-transform_view.html">transform view</a>‎ | <a href="cpp-ranges-transform_view-iterator.html">iterator</a></span></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">friend</span> <span class="kw4">constexpr</span> decltype<span class="br0">(</span><span class="kw4">auto</span><span class="br0">)</span> iter_move<span class="br0">(</span> <span class="kw4">const</span> <span class="coMULTI">/*iterator*/</span><span class="sy3">&</span> i <span class="br0">)</span><br />
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<span class="kw1">noexcept</span><span class="br0">(</span><span class="coMULTI">/* see below */</span><span class="br0">)</span><span class="sy4">;</span></span></div>
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<td class="t-dcl-nopad"></td>
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<td><span class="t-mark-rev t-since-cxx20">(C++20 起)</span></td>
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<p>若 <code>*i</code> 为左值引用则返回 <span class="t-c"><span class="mw-geshi cpp source-cpp">std<span class="sy4">::</span><span class="me2">move</span><span class="br0">(</span><span class="sy2">*</span>i<span class="br0">)</span></span></span> ，否则返回 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">*</span>i</span></span> 。</p>
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<p>此函数对通常<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>transform_view::<i>iterator</i><Const></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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<table class="t-par-begin">
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<td>i</td>
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<td>-</td>
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<td>迭代器</td>
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</table>
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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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<p>若 <code>*i</code> 为左值引用则为 <span class="t-c"><span class="mw-geshi cpp source-cpp">std<span class="sy4">::</span><span class="me2">move</span><span class="br0">(</span><span class="sy2">*</span>i<span class="br0">)</span></span></span> ，否则为 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">*</span>i</span></span> 。</p>
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<h3><span class="mw-headline" id=".E5.BC.82.E5.B8.B8">异常</span></h3>
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<div class="t-noexcept-full"><a href="cpp-language-noexcept_spec.html"><tt>noexcept</tt></a> 说明：
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<div class="t-noexcept-box"><span class="t-cc"><span class="mw-geshi cpp source-cpp"><span class="kw1">noexcept</span><span class="br0">(</span><span class="kw1">noexcept</span><span class="br0">(</span><a href="cpp-utility-functional-invoke.html"><span class="kw1058">std::<span class="me2">invoke</span></span></a><span class="br0">(</span><span class="sy2">*</span>i.<span class="me1">parent_</span><span class="sy2">-</span><span class="sy1">></span>fun_, <span class="sy2">*</span>i.<span class="me1">current_</span><span class="br0">)</span><span class="br0">)</span><span class="br0">)</span></span></span></div>
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，其中 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">*</span>i.<span class="me1">parent_</span><span class="sy2">-</span><span class="sy1">></span>fun_</span></span> 代表变换函数， <span class="t-c"><span class="mw-geshi cpp source-cpp">i.<span class="me1">current_</span></span></span> 代表底层迭代器。</div>
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