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<title>operator&lt;&lt;,&gt;&gt;(std::filesystem::path)</title>
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<h1 id="firstHeading" class="firstHeading">operator&lt;&lt;,&gt;&gt;<span style="font-size:0.7em; line-height:130%">(std::filesystem::path)</span></h1>
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<div id="contentSub"><span class="subpages">&lt; <a href="cpp.html">cpp</a>&lrm; | <a href="cpp-filesystem.html">filesystem</a>&lrm; | <a href="cpp-filesystem-path.html">path</a></span></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1">&lt;</span> <span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits <span class="sy1">&gt;</span><br /></span>
<p><span class="kw1">friend</span> <a href="cpp-io-basic_ostream.html"><span class="kw1715">std::<span class="me2">basic_ostream</span></span></a><span class="sy1">&lt;</span>CharT,Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span><br /></p>
&nbsp; &nbsp; operator<span class="sy1">&lt;&lt;</span><span class="br0">(</span> <a href="cpp-io-basic_ostream.html"><span class="kw1715">std::<span class="me2">basic_ostream</span></span></a><span class="sy1">&lt;</span>CharT,Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> os, <span class="kw4">const</span> path<span class="sy3">&amp;</span> p <span class="br0">)</span><span class="sy4">;</span></div>
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<td>(1)</td>
<td><span class="t-mark-rev t-since-cxx17">(C++17 &#36215;)</span></td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1">&lt;</span> <span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits <span class="sy1">&gt;</span><br /></span>
<p><span class="kw1">friend</span> <a href="cpp-io-basic_istream.html"><span class="kw1713">std::<span class="me2">basic_istream</span></span></a><span class="sy1">&lt;</span>CharT,Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span><br /></p>
&nbsp; &nbsp; operator<span class="sy1">&gt;&gt;</span><span class="br0">(</span> <a href="cpp-io-basic_istream.html"><span class="kw1713">std::<span class="me2">basic_istream</span></span></a><span class="sy1">&lt;</span>CharT,Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> is, path<span class="sy3">&amp;</span> p <span class="br0">)</span><span class="sy4">;</span></div>
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<td>(2)</td>
<td><span class="t-mark-rev t-since-cxx17">(C++17 &#36215;)</span></td>
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<p>&#36827;&#34892;&#36335;&#24452; <code>p</code> &#19978;&#30340;&#27969;&#36755;&#20837;&#25110;&#36755;&#20986;&#12290;&#20351;&#29992; <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-io-manip-quoted.html"><span class="kw1802">std::<span class="me2">quoted</span></span></a></span></span> &#65292;&#20351;&#24471;&#20043;&#21518;&#20174;&#27969;&#36755;&#20837;&#36816;&#31639;&#31526;&#35835;&#21462;&#26102;&#31354;&#26684;&#19981;&#23548;&#33268;&#25130;&#26029;&#12290;</p>
<p>&#36825;&#20123;&#20989;&#25968;&#27169;&#26495;&#23545;&#36890;&#24120;<a href="cpp-language-unqualified_lookup.html">&#26080;&#38480;&#23450;</a>&#25110;<a href="cpp-language-qualified_lookup.html">&#26377;&#38480;&#23450;&#26597;&#25214;</a>&#19981;&#21487;&#35265;&#65292;&#32780;&#21482;&#33021;&#22312; <code>std::filesystem::path</code> &#20026;&#21442;&#25968;&#30340;&#20851;&#32852;&#31867;&#26102;&#30001;<a href="cpp-language-adl.html">&#23454;&#21442;&#20381;&#36182;&#26597;&#25214;</a>&#25214;&#21040;&#12290;&#36825;&#22312; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw1">using</span> <span class="kw1">namespace</span> std<span class="sy4">::</span><span class="me2">filesystem</span><span class="sy4">;</span></span></span> <i>using &#25351;&#20196;</i>&#23384;&#22312;&#26102;&#38459;&#27490;&#19981;&#24819;&#35201;&#30340;&#36716;&#25442;&#12290;</p>
<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">&#21442;&#25968;</span></h3>
<table class="t-par-begin">
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<td>os</td>
<td>-</td>
<td>&#35201;&#36827;&#34892;&#36755;&#20986;&#30340;&#27969;</td>
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<tr class="t-par">
<td>is</td>
<td>-</td>
<td>&#35201;&#36827;&#34892;&#36755;&#20837;&#30340;&#27969;</td>
</tr>
<tr class="t-par">
<td>p</td>
<td>-</td>
<td>&#35201;&#25554;&#20837;&#25110;&#37322;&#20986;&#30340;&#36335;&#24452;</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)</span> <span class="t-c"><span class="mw-geshi cpp source-cpp">os</span></span></div>
<div class="t-li1"><span class="t-li">2)</span> <span class="t-c"><span class="mw-geshi cpp source-cpp">is</span></span></div>
<h3><span class="mw-headline" id=".E5.BC.82.E5.B8.B8">&#24322;&#24120;</span></h3>
<p>&#21487;&#33021;&#25243;&#20986;&#23454;&#29616;&#23450;&#20041;&#30340;&#24322;&#24120;&#12290;</p>
<h3><span class="mw-headline" id=".E5.8F.AF.E8.83.BD.E7.9A.84.E5.AE.9E.E7.8E.B0">&#21487;&#33021;&#30340;&#23454;&#29616;</span></h3>
<table class="eq-fun-cpp-table">
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<th>&#29256;&#26412;&#19968;</th>
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<td>
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<div class="cpp source-cpp">
<pre class="de1"><span class="kw1">template</span><span class="sy1">&lt;</span> <span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits <span class="sy1">&gt;</span>
<span class="kw1">friend</span> <a href="cpp-io-basic_ostream.html"><span class="kw1715">std::<span class="me2">basic_ostream</span></span></a><span class="sy1">&lt;</span>CharT,Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span>
operator<span class="sy1">&lt;&lt;</span><span class="br0">(</span> <a href="cpp-io-basic_ostream.html"><span class="kw1715">std::<span class="me2">basic_ostream</span></span></a><span class="sy1">&lt;</span>CharT,Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> os, <span class="kw4">const</span> path<span class="sy3">&amp;</span> p <span class="br0">)</span>
<span class="br0">{</span>
os <span class="sy1">&lt;&lt;</span> <a href="cpp-io-manip-quoted.html"><span class="kw1802">std::<span class="me2">quoted</span></span></a><span class="br0">(</span>p.<span class="me1">string</span><span class="sy1">&lt;</span>CharT,Traits<span class="sy1">&gt;</span><span class="br0">(</span><span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">return</span> os<span class="sy4">;</span>
<span class="br0">}</span></pre></div>
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</td>
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<th>&#29256;&#26412;&#20108;</th>
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<td>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="cpp source-cpp">
<pre class="de1"><span class="kw1">template</span><span class="sy1">&lt;</span> <span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits <span class="sy1">&gt;</span>
<span class="kw1">friend</span> <a href="cpp-io-basic_istream.html"><span class="kw1713">std::<span class="me2">basic_istream</span></span></a><span class="sy1">&lt;</span>CharT,Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span>
operator<span class="sy1">&gt;&gt;</span><span class="br0">(</span> <a href="cpp-io-basic_istream.html"><span class="kw1713">std::<span class="me2">basic_istream</span></span></a><span class="sy1">&lt;</span>CharT,Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> is, path<span class="sy3">&amp;</span> p <span class="br0">)</span>
<span class="br0">{</span>
<a href="cpp-string-basic_string.html"><span class="kw1228">std::<span class="me2">basic_string</span></span></a><span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span> t<span class="sy4">;</span>
is <span class="sy1">&gt;&gt;</span> <a href="cpp-io-manip-quoted.html"><span class="kw1802">std::<span class="me2">quoted</span></span></a><span class="br0">(</span>t<span class="br0">)</span><span class="sy4">;</span>
p <span class="sy1">=</span> t<span class="sy4">;</span>
<span class="kw1">return</span> is<span class="sy4">;</span>
<span class="br0">}</span></pre></div>
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<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">&#31034;&#20363;</span></h3>
<div class="t-example">
<div class="t-example-live-link"></div>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="cpp source-cpp">
<pre class="de1"><span class="co2">#include &lt;iostream&gt;</span>
<span class="co2">#include &lt;filesystem&gt;</span>
<span class="kw4">int</span> main<span class="br0">(</span><span class="br0">)</span>
<span class="br0">{</span>
<a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <a href="cpp-filesystem-current_path.html"><span class="kw2273">std::<span class="me2">filesystem</span><span class="sy4">::</span><span class="me2">current_path</span></span></a><span class="br0">(</span><span class="br0">)</span> <span class="sy1">&lt;&lt;</span> <span class="st0">&#39;<span class="es1">\n</span>&#39;</span><span class="sy4">;</span>
<a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <a href="cpp-filesystem-temp_directory_path.html"><span class="kw2288">std::<span class="me2">filesystem</span><span class="sy4">::</span><span class="me2">temp_directory_path</span></span></a><span class="br0">(</span><span class="br0">)</span> <span class="sy1">&lt;&lt;</span> <span class="st0">&#39;<span class="es1">\n</span>&#39;</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div>
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<p>&#21487;&#33021;&#30340;&#36755;&#20986;&#65306;</p>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="text source-text">
<pre class="de1">&quot;/home/user&quot;
&quot;/tmp&quot;</pre></div>
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<h3><span class="mw-headline" id=".E7.BC.BA.E9.99.B7.E6.8A.A5.E5.91.8A">&#32570;&#38519;&#25253;&#21578;</span></h3>
<p>&#19979;&#21015;&#26356;&#25913;&#34892;&#20026;&#30340;&#32570;&#38519;&#25253;&#21578;&#36861;&#28335;&#22320;&#24212;&#29992;&#20110;&#20197;&#21069;&#20986;&#29256;&#30340; C++ &#26631;&#20934;&#12290;</p>
<table class="dsctable" style="font-size:0.8em">
<tr>
<th>DR</th>
<th>&#24212;&#29992;&#20110;</th>
<th>&#20986;&#29256;&#26102;&#30340;&#34892;&#20026;</th>
<th>&#27491;&#30830;&#34892;&#20026;</th>
</tr>
<tr>
<td><a rel="nofollow" class="external text" href="https://cplusplus.github.io/LWG/issue2989">LWG 2989</a></td>
<td>C++17</td>
<td>&#20801;&#35768;&#22312; <i>using &#25351;&#20196;</i>&#23384;&#22312;&#26102;&#25554;&#20837;&#20219;&#20309;&#33021;&#36716;&#25442;&#21040; <code>path</code> &#30340;&#34920;&#36798;&#24335;</td>
<td>&#20351;&#20043;&#20026;&#38544;&#34255;&#30340;&#21451;&#20803;</td>
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</div>
<div class="visualClear"></div>
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