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<title>std::ranges::transform_view&lt;V,F&gt;::iterator&lt;Const&gt;::operator++,--,+=,-=</title>
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::ranges::transform_view&lt;V,F&gt;::<i>iterator</i>&lt;Const&gt;::</span>operator++,--,+=,-=</h1>
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<div id="contentSub"><span class="subpages">&lt; <a href="cpp.html">cpp</a>&lrm; | <a href="cpp-ranges.html">ranges</a>&lrm; | <a href="cpp-ranges-transform_view.html">transform view</a>&lrm; | <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="kw4">constexpr</span> <span class="coMULTI">/*iterator*/</span><span class="sy3">&amp;</span> operator<span class="sy2">++</span><span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(1)</td>
<td><span class="t-mark-rev t-since-cxx20">(C++20 &#36215;)</span></td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">constexpr</span> <span class="kw4">void</span> operator<span class="sy2">++</span><span class="br0">(</span> <span class="kw4">int</span> <span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(2)</td>
<td><span class="t-mark-rev t-since-cxx20">(C++20 &#36215;)</span></td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">constexpr</span> <span class="coMULTI">/*iterator*/</span> operator<span class="sy2">++</span><span class="br0">(</span> <span class="kw4">int</span> <span class="br0">)</span><br />
&nbsp; requires ranges<span class="sy4">::</span><span class="me2">forward_range</span><span class="sy1">&lt;</span>Base<span class="sy1">&gt;</span><span class="sy4">;</span></span></div>
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<td>(3)</td>
<td><span class="t-mark-rev t-since-cxx20">(C++20 &#36215;)</span></td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">constexpr</span> <span class="coMULTI">/*iterator*/</span><span class="sy3">&amp;</span> operator<span class="sy2">--</span><span class="br0">(</span><span class="br0">)</span><br />
&nbsp; requires ranges<span class="sy4">::</span><span class="me2">bidirectional_range</span><span class="sy1">&lt;</span>Base<span class="sy1">&gt;</span><span class="sy4">;</span></span></div>
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<td>(4)</td>
<td><span class="t-mark-rev t-since-cxx20">(C++20 &#36215;)</span></td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">constexpr</span> <span class="coMULTI">/*iterator*/</span> operator<span class="sy2">--</span><span class="br0">(</span> <span class="kw4">int</span> <span class="br0">)</span><br />
&nbsp; requires ranges<span class="sy4">::</span><span class="me2">bidirectional_range</span><span class="sy1">&lt;</span>Base<span class="sy1">&gt;</span><span class="sy4">;</span></span></div>
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<td>(5)</td>
<td><span class="t-mark-rev t-since-cxx20">(C++20 &#36215;)</span></td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">constexpr</span> <span class="coMULTI">/*iterator*/</span><span class="sy3">&amp;</span> operator<span class="sy2">+</span><span class="sy1">=</span><span class="br0">(</span> difference_type n <span class="br0">)</span><br />
&nbsp; requires ranges<span class="sy4">::</span><span class="me2">random_access_range</span><span class="sy1">&lt;</span>Base<span class="sy1">&gt;</span><span class="sy4">;</span></span></div>
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<td>(6)</td>
<td><span class="t-mark-rev t-since-cxx20">(C++20 &#36215;)</span></td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">constexpr</span> <span class="coMULTI">/*iterator*/</span><span class="sy3">&amp;</span> operator<span class="sy2">-</span><span class="sy1">=</span><span class="br0">(</span> difference_type n <span class="br0">)</span><br />
&nbsp; requires ranges<span class="sy4">::</span><span class="me2">random_access_range</span><span class="sy1">&lt;</span>Base<span class="sy1">&gt;</span><span class="sy4">;</span></span></div>
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<td>(7)</td>
<td><span class="t-mark-rev t-since-cxx20">(C++20 &#36215;)</span></td>
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<p>&#22686;&#21152;&#25110;&#20943;&#23569;&#36845;&#20195;&#22120;&#12290;</p>
<p>&#20196; <code>current_</code> &#20026;&#24213;&#23618;&#36845;&#20195;&#22120;&#12290;</p>
<div class="t-li1"><span class="t-li">1)</span> &#31561;&#20215;&#20110; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">++</span>current_<span class="sy4">;</span> <span class="kw1">return</span> <span class="sy2">*</span>this<span class="sy4">;</span></span></span></div>
<div class="t-li1"><span class="t-li">2)</span> &#31561;&#20215;&#20110; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">++</span>current_<span class="sy4">;</span></span></span></div>
<div class="t-li1"><span class="t-li">3)</span> &#31561;&#20215;&#20110; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">auto</span> tmp <span class="sy1">=</span> <span class="sy2">*</span>this<span class="sy4">;</span> <span class="sy2">++*</span>this<span class="sy4">;</span> <span class="kw1">return</span> tmp<span class="sy4">;</span></span></span></div>
<div class="t-li1"><span class="t-li">4)</span> &#31561;&#20215;&#20110; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">--</span>current_<span class="sy4">;</span> <span class="kw1">return</span> <span class="sy2">*</span>this<span class="sy4">;</span></span></span></div>
<div class="t-li1"><span class="t-li">5)</span> &#31561;&#20215;&#20110; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">auto</span> tmp <span class="sy1">=</span> <span class="sy2">*</span>this<span class="sy4">;</span> <span class="sy2">--*</span>this<span class="sy4">;</span> <span class="kw1">return</span> tmp<span class="sy4">;</span></span></span></div>
<div class="t-li1"><span class="t-li">6)</span> &#31561;&#20215;&#20110; <span class="t-c"><span class="mw-geshi cpp source-cpp">current_ <span class="sy2">+</span><span class="sy1">=</span> n<span class="sy4">;</span> <span class="kw1">return</span> <span class="sy2">*</span>this<span class="sy4">;</span></span></span></div>
<div class="t-li1"><span class="t-li">7)</span> &#31561;&#20215;&#20110; <span class="t-c"><span class="mw-geshi cpp source-cpp">current_ <span class="sy2">-</span><span class="sy1">=</span> n<span class="sy4">;</span> <span class="kw1">return</span> <span class="sy2">*</span>this<span class="sy4">;</span></span></span></div>
<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">&#21442;&#25968;</span></h3>
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<td>n</td>
<td>-</td>
<td>&#30456;&#23545;&#20110;&#24403;&#21069;&#20301;&#32622;&#30340;&#20301;&#32622;</td>
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<h3><span class="mw-headline" id=".E8.BF.94.E5.9B.9E.E5.80.BC">&#36820;&#22238;&#20540;</span></h3>
<div class="t-li1"><span class="t-li">1,4,6,7)</span> <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">*</span>this</span></span></div>
<div class="t-li1"><span class="t-li">3,5)</span> &#20462;&#25913;&#21069;&#20316;&#20986;&#30340; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">*</span>this</span></span> &#30340;&#21103;&#26412;</div>
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