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hustoj/web/cppreference-zh/chmhelp/cpp-filesystem-filesystem_error-path.html
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<title>std::filesystem::filesystem_error::path1, std::filesystem::filesystem_error::path2</title>
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::filesystem::filesystem_error::</span>path1, <span style="font-size:0.7em; line-height:130%">std::filesystem::filesystem_error::</span>path2</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-filesystem_error.html">filesystem error</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">&amp;</span> path1<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 &#36215;)</span></td>
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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">&amp;</span> path2<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 &#36215;)</span></td>
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<p>&#36820;&#22238;&#23384;&#20648;&#20110;&#24322;&#24120;&#23545;&#35937;&#20013;&#30340;&#36335;&#24452;&#12290;</p>
<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">&#21442;&#25968;</span></h3>
<p>&#65288;&#26080;&#65289;</p>
<h3><span class="mw-headline" id=".E8.BF.94.E5.9B.9E.E5.80.BC">&#36820;&#22238;&#20540;</span></h3>
<p>&#21040;&#26500;&#36896;&#20989;&#25968;&#25152;&#23384;&#20648;&#30340; <code>path</code> &#21442;&#25968;&#30340;&#21103;&#26412;&#30340;&#24341;&#29992;&#12290;</p>
<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">&#31034;&#20363;</span></h3>
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<pre class="de1"><span class="co2">#include &lt;cstdio&gt;</span>
<span class="co2">#include &lt;filesystem&gt;</span>
<span class="co2">#include &lt;iostream&gt;</span>
<span class="kw4">int</span> main<span class="br0">(</span><span class="br0">)</span>
<span class="br0">{</span>
<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> old_p<span class="br0">{</span><a href="cpp-io-c-tmpnam.html"><span class="kw1876">std::<span class="me2">tmpnam</span></span></a><span class="br0">(</span>nullptr<span class="br0">)</span><span class="br0">}</span>,
new_p<span class="br0">{</span><a href="cpp-io-c-tmpnam.html"><span class="kw1876">std::<span class="me2">tmpnam</span></span></a><span class="br0">(</span>nullptr<span class="br0">)</span><span class="br0">}</span><span class="sy4">;</span>
<span class="kw1">try</span> <span class="br0">{</span>
<a href="cpp-filesystem-rename.html"><span class="kw2283">std::<span class="me2">filesystem</span><span class="sy4">::</span><span class="me2">rename</span></span></a><span class="br0">(</span>old_p, new_p<span class="br0">)</span><span class="sy4">;</span> <span class="co1">// &#22240;&#20026; old_p &#19981;&#23384;&#22312;&#32780;&#25243;&#20986;</span>
<span class="br0">}</span>
<span class="kw1">catch</span><span class="br0">(</span><a href="cpp-filesystem-filesystem_error.html"><span class="kw2202">std::<span class="me2">filesystem</span><span class="sy4">::</span><span class="me2">filesystem_error</span></span></a> <span class="kw4">const</span><span class="sy3">&amp;</span> ex<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> <span class="st0">&quot;what(): &quot;</span> <span class="sy1">&lt;&lt;</span> ex.<span class="me1">what</span><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="sy1">&lt;&lt;</span> <span class="st0">&quot;path1(): &quot;</span> <span class="sy1">&lt;&lt;</span> ex.<span class="me1">path1</span><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="sy1">&lt;&lt;</span> <span class="st0">&quot;path2(): &quot;</span> <span class="sy1">&lt;&lt;</span> ex.<span class="me1">path2</span><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>
<span class="br0">}</span></pre></div>
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<p>&#21487;&#33021;&#30340;&#36755;&#20986;&#65306;</p>
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<pre class="de1">what(): filesystem error: cannot rename: No such file or directory [/tmp/fileIzzRLB] [/tmp/fileiUDWlV]
path1(): &quot;/tmp/fileIzzRLB&quot;
path2(): &quot;/tmp/fileiUDWlV&quot;</pre></div>
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