102 lines
7.4 KiB
HTML
102 lines
7.4 KiB
HTML
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<title>std::filesystem::directory_entry::path</title>
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::filesystem::directory_entry::</span>path</h1>
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<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-filesystem.html">filesystem</a>‎ | <a href="cpp-filesystem-directory_entry.html">directory entry</a></span></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">const</span> <a href="cpp-filesystem-path.html"><span class="kw2199">std::<span class="me2">filesystem</span><span class="sy4">::</span><span class="me2">path</span></span></a><span class="sy3">&</span> path<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span></span></div>
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<td><span class="t-mark-rev t-since-cxx17">(C++17 起)</span></td>
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<div><span class="mw-geshi cpp source-cpp">operator <span class="kw4">const</span> <a href="cpp-filesystem-path.html"><span class="kw2199">std::<span class="me2">filesystem</span><span class="sy4">::</span><span class="me2">path</span></span></a><span class="sy3">&</span> <span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span></span></div>
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<td><span class="t-mark-rev t-since-cxx17">(C++17 起)</span></td>
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<p>返回 directory_entry 所保有的路径对象。</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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<p>(无)</p>
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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>directory_entry 所保有的 path 对象。</p>
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<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">示例</span></h3>
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<div class="t-example t-example-std-cxx17">
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<div class="cpp source-cpp">
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<pre class="de1"><span class="co2">#include <filesystem></span>
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<span class="co2">#include <fstream></span>
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<span class="co2">#include <iostream></span>
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<span class="kw1">namespace</span> fs <span class="sy1">=</span> std<span class="sy4">::</span><span class="me2">filesystem</span><span class="sy4">;</span>
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<a href="cpp-string-basic_string.html"><span class="kw1230">std::<span class="me2">string</span></span></a> get_stem<span class="br0">(</span><span class="kw4">const</span> fs<span class="sy4">::</span><span class="me2">path</span> <span class="sy3">&</span>p<span class="br0">)</span> <span class="br0">{</span> <span class="kw1">return</span> <span class="br0">(</span>p.<span class="me1">stem</span><span class="br0">(</span><span class="br0">)</span>.<span class="me1">string</span><span class="br0">(</span><span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span> <span class="br0">}</span>
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<span class="kw4">void</span> create_file<span class="br0">(</span><span class="kw4">const</span> fs<span class="sy4">::</span><span class="me2">path</span> <span class="sy3">&</span>p<span class="br0">)</span> <span class="br0">{</span> <a href="cpp-io-basic_ofstream.html"><span class="kw1733">std::<span class="me2">ofstream</span></span></a> o<span class="br0">{</span>p<span class="br0">}</span><span class="sy4">;</span> <span class="br0">}</span>
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<span class="kw4">int</span> main<span class="br0">(</span><span class="br0">)</span>
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<span class="br0">{</span>
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<span class="kw4">const</span> fs<span class="sy4">::</span><span class="me2">path</span> dir<span class="br0">{</span><span class="st0">"tmp_dir"</span><span class="br0">}</span><span class="sy4">;</span>
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fs<span class="sy4">::</span><span class="me2">create_directory</span><span class="br0">(</span>dir<span class="br0">)</span><span class="sy4">;</span>
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create_file<span class="br0">(</span>dir <span class="sy2">/</span> <span class="st0">"one"</span><span class="br0">)</span><span class="sy4">;</span>
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create_file<span class="br0">(</span>dir <span class="sy2">/</span> <span class="st0">"two"</span><span class="br0">)</span><span class="sy4">;</span>
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create_file<span class="br0">(</span>dir <span class="sy2">/</span> <span class="st0">"three"</span><span class="br0">)</span><span class="sy4">;</span>
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<span class="kw1">for</span> <span class="br0">(</span><span class="kw4">const</span> <span class="kw4">auto</span> <span class="sy3">&</span>file <span class="sy4">:</span> fs<span class="sy4">::</span><span class="me2">directory_iterator</span><span class="br0">(</span>dir<span class="br0">)</span><span class="br0">)</span> <span class="br0">{</span>
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<span class="co1">// 显式转换</span>
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<a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1"><<</span> get_stem<span class="br0">(</span>file.<span class="me1">path</span><span class="br0">(</span><span class="br0">)</span><span class="br0">)</span> <span class="sy1"><<</span> <span class="st0">'<span class="es1">\n</span>'</span><span class="sy4">;</span>
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<span class="co1">// 隐式转换</span>
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<a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1"><<</span> get_stem<span class="br0">(</span>file<span class="br0">)</span> <span class="sy1"><<</span> <span class="st0">'<span class="es1">\n</span>'</span><span class="sy4">;</span>
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<span class="br0">}</span>
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fs<span class="sy4">::</span><span class="me2">remove_all</span><span class="br0">(</span>dir<span class="br0">)</span><span class="sy4">;</span>
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<span class="br0">}</span></pre></div>
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<p>可能的输出:</p>
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<div dir="ltr" class="mw-geshi" style="text-align: left;">
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<div class="text source-text">
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<pre class="de1">two
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two
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one
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one
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three
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three</pre></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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