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<title>std::ranges::transform_view&lt;V,F&gt;::size</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;::</span>size</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></span></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">constexpr</span> <span class="kw4">auto</span> size<span class="br0">(</span><span class="br0">)</span> requires ranges<span class="sy4">::</span><span class="me2">sized_range</span><span class="sy1">&lt;</span>V<span class="sy1">&gt;</span><span class="sy4">;</span></span></div>
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<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">auto</span> size<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> requires ranges<span class="sy4">::</span><span class="me2">sized_range</span><span class="sy1">&lt;</span><span class="kw4">const</span> V<span class="sy1">&gt;</span><span class="sy4">;</span></span></div>
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<td><span class="t-mark-rev t-since-cxx20">(C++20 &#36215;)</span></td>
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<p>&#36820;&#22238;&#20803;&#32032;&#25968;&#12290;</p>
<p>&#36820;&#22238; <span class="t-c"><span class="mw-geshi cpp source-cpp">ranges<span class="sy4">::</span><span class="me2">size</span><span class="br0">(</span>base_<span class="br0">)</span></span></span> &#65292;&#20854;&#20013; <code>base_</code> &#26159;&#24213;&#23618;&#35270;&#22270;&#12290;=</p>
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<p>&#33509; <code>V</code> &#19981;&#23454;&#29616; <a href="cpp-ranges-forward_range.html"><code>forward_range</code></a> &#65292;&#21017; <code>size()</code> &#22312;&#35843;&#29992; <span class="t-lc">begin()</span> &#21518;&#21487;&#33021;&#38750;&#33391;&#23450;&#20041;&#12290;</p>
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