279 lines
13 KiB
HTML
279 lines
13 KiB
HTML
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<html lang="zh" dir="ltr" class="client-nojs" xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh">
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<title>std::filesystem::directory_entry</title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_filesystem_directory_entry skin-cppreference2 action-view cpp-navbar">
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<div id="cpp-content-base">
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::filesystem::</span>directory_entry</h1>
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<div id="bodyContent">
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<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-filesystem.html">filesystem</a></span></div>
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<div id="mw-content-text" lang="zh" dir="ltr" class="mw-content-ltr" xml:lang="zh">
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<table class="t-dcl-begin">
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<td>
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<div>定义于头文件 <code><a href="cpp-header-filesystem.html"><filesystem></a></code></div>
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</td>
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<td></td>
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<td></td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">class</span> directory_entry<span class="sy4">;</span></span></div>
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<td class="t-dcl-nopad"></td>
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<td><span class="t-mark-rev t-since-cxx17">(C++17 起)</span></td>
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<tr class="t-dcl-sep">
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<td></td>
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<td></td>
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<td></td>
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<p>表示目录条目。该对象存储一个 <code>path</code> 作为成员，并可能也在目录迭代过程中存储附带的文件属性（硬链接数、状态、符号链接状态、文件大小、及最后写入时间）。</p>
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<h3><span class="mw-headline" id=".E6.88.90.E5.91.98.E5.87.BD.E6.95.B0">成员函数</span></h3>
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<div class="t-dsc-member-div t-dsc-member-nobold-div">
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<div><a href="cpp-filesystem-directory_entry-directory_entry.html"><span class="t-lines"><span>(构造函数)</span></span></a></div>
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</div>
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</td>
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<td>构造一个 directory_entry<br />
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<span class="t-mark">(公开成员函数)</span></td>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div t-dsc-member-nobold-div">
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<div><span class="t-lines"><span>(析构函数)</span></span></div>
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</div>
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</td>
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<td>默认析构函数<br />
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<span class="t-mark">(公开成员函数)</span></td>
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<td colspan="2">
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<h5><span class="mw-headline" id=".E4.BF.AE.E6.94.B9.E5.99.A8">修改器</span></h5>
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<tr class="t-dsc">
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<div class="t-dsc-member-div">
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<div><a href="cpp-filesystem-directory_entry-operator=.html"><span class="t-lines"><span>operator=</span></span></a></div>
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</div>
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</td>
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<td>赋值内容<br />
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<span class="t-mark">(公开成员函数)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-filesystem-directory_entry-assign.html"><span class="t-lines"><span>assign</span></span></a></div>
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</div>
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</td>
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<td>赋值内容<br />
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<span class="t-mark">(公开成员函数)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-filesystem-directory_entry-replace_filename.html"><span class="t-lines"><span>replace_filename</span></span></a></div>
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</div>
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</td>
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<td>设置文件名<br />
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<span class="t-mark">(公开成员函数)</span></td>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-filesystem-directory_entry-refresh.html"><span class="t-lines"><span>refresh</span></span></a></div>
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</div>
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</td>
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<td>更新缓存的文件属性<br />
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<span class="t-mark">(公开成员函数)</span></td>
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<tr>
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<td colspan="2">
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<h5><span class="mw-headline" id=".E8.A7.82.E5.AF.9F.E5.99.A8">观察器</span></h5>
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</td>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-filesystem-directory_entry-path.html"><span class="t-lines"><span>path</span><span>operator const path&</span></span></a></div>
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</div>
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</td>
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<td>返回该目录项代表的路径<br />
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<span class="t-mark">(公开成员函数)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-filesystem-directory_entry-exists.html"><span class="t-lines"><span>exists</span></span></a></div>
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</div>
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</td>
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<td>检查 directory_entry 是否代表既存文件系统对象<br />
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<span class="t-mark">(公开成员函数)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-filesystem-directory_entry-is_block_file.html"><span class="t-lines"><span>is_block_file</span></span></a></div>
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</div>
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</td>
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<td>检查 directory_entry 是否代表阻塞设备<br />
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<span class="t-mark">(公开成员函数)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-filesystem-directory_entry-is_character_file.html"><span class="t-lines"><span>is_character_file</span></span></a></div>
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</div>
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</td>
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<td>检查 directory_entry 是否代表字符设备<br />
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<span class="t-mark">(公开成员函数)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-filesystem-directory_entry-is_directory.html"><span class="t-lines"><span>is_directory</span></span></a></div>
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</div>
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</td>
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<td>检查 directory_entry 是否代表目录<br />
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<span class="t-mark">(公开成员函数)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-filesystem-directory_entry-is_fifo.html"><span class="t-lines"><span>is_fifo</span></span></a></div>
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</div>
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</td>
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<td>检查 directory_entry 是否代表具名管道<br />
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<span class="t-mark">(公开成员函数)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-filesystem-directory_entry-is_other.html"><span class="t-lines"><span>is_other</span></span></a></div>
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</div>
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</td>
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<td>检查 directory_entry 是否代表<i>其他</i>文件<br />
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<span class="t-mark">(公开成员函数)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-filesystem-directory_entry-is_regular_file.html"><span class="t-lines"><span>is_regular_file</span></span></a></div>
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</div>
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</td>
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<td>检查 directory_entry 是否代表常规文件<br />
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<span class="t-mark">(公开成员函数)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-filesystem-directory_entry-is_socket.html"><span class="t-lines"><span>is_socket</span></span></a></div>
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</div>
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</td>
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<td>检查 directory_entry 是否代表具名 IPC 接头<br />
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<span class="t-mark">(公开成员函数)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-filesystem-directory_entry-is_symlink.html"><span class="t-lines"><span>is_symlink</span></span></a></div>
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</div>
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</td>
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<td>检查 directory_entry 是否代表符号链接<br />
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<span class="t-mark">(公开成员函数)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-filesystem-directory_entry-file_size.html"><span class="t-lines"><span>file_size</span></span></a></div>
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</div>
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</td>
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<td>返回 directory_entry 所指代的文件大小<br />
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<span class="t-mark">(公开成员函数)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-filesystem-directory_entry-hard_link_count.html"><span class="t-lines"><span>hard_link_count</span></span></a></div>
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</div>
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</td>
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<td>返回引用到该 directory_entry 所表示的文件的硬链接数<br />
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<span class="t-mark">(公开成员函数)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-filesystem-directory_entry-last_write_time.html"><span class="t-lines"><span>last_write_time</span></span></a></div>
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</div>
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</td>
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<td>获取或设置 directory_entry 所代表的文件的最后数据修改时间<br />
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<span class="t-mark">(公开成员函数)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-filesystem-directory_entry-status.html"><span class="t-lines"><span>status</span><span>symlink_status</span></span></a></div>
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</div>
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</td>
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<td>此 directory_entry 所指代的文件的状态<br />
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此 directory_entry 所指代的文件的符号链接状态<br />
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<span class="t-mark">(公开成员函数)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-filesystem-directory_entry-operator_cmp.html"><span class="t-lines"><span>operator==</span><span>operator!=</span><span>operator<</span><span>operator<=</span><span>operator></span><span>operator>=</span><span>operator<=></span></span></a></div>
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<div><span class="t-lines"><span></span><span><span class="t-mark-rev t-until-cxx20">(C++20 中移除)</span></span><span><span class="t-mark-rev t-until-cxx20">(C++20 中移除)</span></span><span><span class="t-mark-rev t-until-cxx20">(C++20 中移除)</span></span><span><span class="t-mark-rev t-until-cxx20">(C++20 中移除)</span></span><span><span class="t-mark-rev t-until-cxx20">(C++20 中移除)</span></span><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
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</div>
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</td>
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<td>比较二个目录条目<br />
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<span class="t-mark">(公开成员函数)</span></td>
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</tr>
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</table>
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<h3><span class="mw-headline" id=".E9.9D.9E.E6.88.90.E5.91.98.E5.87.BD.E6.95.B0">非成员函数</span></h3>
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<table class="t-dsc-begin">
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-filesystem-directory_entry-operator_ltlt.html"><span class="t-lines"><span>operator<<</span></span></a></div>
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</div>
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</td>
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<td>进行 directory_entry 上的流输出<br />
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<span class="t-mark">(函数)</span></td>
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</tr>
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</table>
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<h3><span class="mw-headline" id=".E7.BC.BA.E9.99.B7.E6.8A.A5.E5.91.8A">缺陷报告</span></h3>
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<p>下列更改行为的缺陷报告追溯地应用于以前出版的 C++ 标准。</p>
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<table class="dsctable" style="font-size:0.8em">
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<tr>
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<th>DR</th>
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<th>应用于</th>
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<th>出版时的行为</th>
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<th>正确行为</th>
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</tr>
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<tr>
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<td><a rel="nofollow" class="external text" href="https://cplusplus.github.io/LWG/issue3171">LWG 3171</a></td>
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<td>C++17</td>
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<td><code>directory_entry</code> 不能由 <code>operator<<</code> 插入，因为 LWG2989</td>
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<td>重新使输出可能</td>
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</tr>
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</table>
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</div>
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<div class="visualClear"></div>
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</div>
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