557 lines
31 KiB
HTML
557 lines
31 KiB
HTML
<!DOCTYPE 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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<head><meta http-equiv="x-ua-compatible" content="ie=edge">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<title>文件系统库</title>
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<link rel="stylesheet" href="ext.css" />
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<link rel="stylesheet" href="site_modules.css" />
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</head>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_filesystem skin-cppreference2 action-view cpp-navbar">
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<div id="cpp-content-base">
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<div id="content"><a id="top"></a>
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<h1 id="firstHeading" class="firstHeading">文件系统库</h1>
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<div id="bodyContent">
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<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</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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<p>文件系统库提供在文件系统与其组件，例如路径、常规文件与目录上进行操作的设施。</p>
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<p>文件系统库原作为 <a rel="nofollow" class="external text" href="http://www.boost.org/doc/libs/release/libs/filesystem/doc/index.htm">boost.filesystem</a> 开发，出版为<a href="cpp-experimental-fs.html">技术规范 ISO/IEC TS 18822:2015</a> ，并最终从 C++17 开始并入 ISO C++ 。现在 boost 实现可用的编译器和平台于多于 C++17 库。</p>
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<p>若层级文件系统不能为实现所访问，或若它不提供必要的兼容性，则文件系统库设施可能不可用。若底层文件系统不支持，则一些特性可能不可用（例如 FAT 文件系统缺少符号链接并禁止多重硬链接）。这些情况下必须报告错误。</p>
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<p>若对此库的函数的调用引入<i>文件系统竞争</i>，即多个线程、进程或计算机交错地访问并修改文件系统中的同一对象，则行为<a href="cpp-language-ub.html">未定义</a>。</p>
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<h4><span class="mw-headline" id=".E5.BA.93.E8.8C.83.E7.95.B4.E5.AE.9A.E4.B9.89">库范畴定义</span></h4>
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<ul>
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<li><i>文件</i>：持有数据的文件系统对象，能被写入或读取，或二者皆可。文件拥有名称及属性，属性之一是文件类型：</li>
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</ul>
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<dl>
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<dd>
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<ul>
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<li><i>目录</i>：表现为目录条目的容器的文件，目录条目标识其他文件（其中一些可以是另外的嵌套的目录）。讨论到具体文件时，包含该文件目录条目的目录是其<i>父目录</i>。父目录能以相对路径名 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="st0">".."</span></span></span> 表示。</li>
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<li><i>硬链接</i>：关联一个名字到一个既存文件的目录条目。若支持多重硬链接，则文件在最后一个到它的硬链接被移除后才被移除。</li>
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<li><i>符号链接</i>：关联一个名词到一个路径的目录条目，路径可以存在亦可不存在。</li>
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<li><i>常规文件</i>：不是其他文件类型的文件。</li>
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</ul>
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</dd>
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</dl>
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<ul>
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<li><i>文件名</i>：命名一个文件的字符串。容许字符、大小写区别、最大长度以及被禁止名称是实现定义的。名称 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="st0">"."</span></span></span> （点）与 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="st0">".."</span></span></span> （双点）在库层次拥有特殊含义。</li>
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<li><i>路径</i>：标识一个文件的元素序列。它以可选的 <span class="t-spar">根名</span> （例如 Windows 上的 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="st0">"C:"</span></span></span> 或 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="st0">"//server"</span></span></span> ）开始，后随可选的 <span class="t-spar">根目录</span> （例如 Unix 上的 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="st0">"/"</span></span></span> ），后随零或更多个文件名（除了最后一个都必须是目录或到目录的链接）的序列。表示路径的字符串（<i>路径名</i>）的原生格式（如哪些字符被用作分隔符）与字符编码是实现定义的，库提供路径的可移植表示。</li>
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</ul>
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<dl>
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<dd>
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<ul>
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<li><i>绝对路径</i>：无歧义地标识一个文件位置的路径。</li>
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<li><i>规范路径</i>：不包含符号链接、 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="st0">"."</span></span></span> 或 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="st0">".."</span></span></span> 元素的绝对路径。</li>
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<li><i>相对路径</i>：标识相对于文件系统中某位置的文件位置的路径。特殊路径名 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="st0">"."</span></span></span> （点，“当前目录”）和 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="st0">".."</span></span></span> （双点、“父目录”）是相对路径。</li>
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</ul>
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</dd>
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</dl>
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<table class="t-dsc-begin">
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<tr>
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<td colspan="2">
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<h3><span class="mw-headline" id=".E7.B1.BB">类</span></h3>
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</td>
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</tr>
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<tr class="t-dsc-header">
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<td colspan="2">
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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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</tr>
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<tr class="t-dsc-header">
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<td colspan="2">
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<div>定义于命名空间 <code>std::filesystem</code></div>
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</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-path.html"><span class="t-lines"><span>path</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
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</div>
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</td>
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<td>表示路径<br />
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<span class="t-mark">(类)</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-filesystem_error.html"><span class="t-lines"><span>filesystem_error</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
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</div>
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</td>
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<td>文件系统错误时抛出的异常<br />
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<span class="t-mark">(类)</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.html"><span class="t-lines"><span>directory_entry</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
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</div>
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</td>
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<td>目录条目<br />
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<span class="t-mark">(类)</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_iterator.html"><span class="t-lines"><span>directory_iterator</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
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</div>
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</td>
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<td>指向目录内容的迭代器<br />
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<span class="t-mark">(类)</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-recursive_directory_iterator.html"><span class="t-lines"><span>recursive_directory_iterator</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
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</div>
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</td>
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<td>指向一个目录及其子目录的内容的迭代器<br />
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<span class="t-mark">(类)</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-file_status.html"><span class="t-lines"><span>file_status</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
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</div>
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</td>
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<td>表示文件类型及权限<br />
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<span class="t-mark">(类)</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-space_info.html"><span class="t-lines"><span>space_info</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
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</div>
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</td>
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<td>关于文件系统上空闲及可用空间的信息<br />
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<span class="t-mark">(类)</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-file_type.html"><span class="t-lines"><span>file_type</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
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</div>
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</td>
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<td>文件的类型<br />
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<span class="t-mark">(枚举)</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-perms.html"><span class="t-lines"><span>perms</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
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</div>
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</td>
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<td>标识文件系统权限<br />
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<span class="t-mark">(枚举)</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-perm_options.html"><span class="t-lines"><span>perm_options</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
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</div>
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</td>
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<td>指定权限操作的语义<br />
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<span class="t-mark">(枚举)</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-copy_options.html"><span class="t-lines"><span>copy_options</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
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</div>
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</td>
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<td>指定复制操作的语义<br />
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<span class="t-mark">(枚举)</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_options.html"><span class="t-lines"><span>directory_options</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
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</div>
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</td>
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<td>用于迭代目录内容的选项<br />
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<span class="t-mark">(枚举)</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-file_time_type.html"><span class="t-lines"><span>file_time_type</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
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</div>
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</td>
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<td>表示文件时间值<br />
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<span class="t-mark">(typedef)</span></td>
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</tr>
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<tr>
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<td colspan="2">
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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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</td>
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</tr>
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<tr class="t-dsc-header">
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<td colspan="2">
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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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</tr>
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<tr class="t-dsc-header">
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<td colspan="2">
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<div>定义于命名空间 <code>std::filesystem</code></div>
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</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-absolute.html"><span class="t-lines"><span>absolute</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
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</div>
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</td>
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<td>组成一个绝对路径<br />
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<span class="t-mark">(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-canonical.html"><span class="t-lines"><span>canonical</span><span>weakly_canonical</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
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</div>
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</td>
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<td>组成一个规范路径<br />
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<span class="t-mark">(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-relative.html"><span class="t-lines"><span>relative</span><span>proximate</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
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</div>
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</td>
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<td>组成一个相对路径<br />
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<span class="t-mark">(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-copy.html"><span class="t-lines"><span>copy</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
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</div>
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</td>
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<td>复制文件或目录<br />
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<span class="t-mark">(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-copy_file.html"><span class="t-lines"><span>copy_file</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
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</div>
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</td>
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<td>复制文件内容<br />
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<span class="t-mark">(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-copy_symlink.html"><span class="t-lines"><span>copy_symlink</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
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</div>
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</td>
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<td>复制一个符号链接<br />
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<span class="t-mark">(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-create_directory.html"><span class="t-lines"><span>create_directory</span><span>create_directories</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
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</div>
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</td>
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<td>创建新目录<br />
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<span class="t-mark">(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-create_hard_link.html"><span class="t-lines"><span>create_hard_link</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
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</div>
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</td>
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<td>创建一个硬链接<br />
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<span class="t-mark">(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-create_symlink.html"><span class="t-lines"><span>create_symlink</span><span>create_directory_symlink</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
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</div>
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</td>
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<td>创建一个符号链接<br />
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<span class="t-mark">(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-current_path.html"><span class="t-lines"><span>current_path</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
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</div>
|
|
</td>
|
|
<td>返回或设置当前工作目录<br />
|
|
<span class="t-mark">(函数)</span></td>
|
|
</tr>
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="cpp-filesystem-exists.html"><span class="t-lines"><span>exists</span></span></a></div>
|
|
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
|
|
</div>
|
|
</td>
|
|
<td>检查路径是否指代既存的文件系统对象<br />
|
|
<span class="t-mark">(函数)</span></td>
|
|
</tr>
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="cpp-filesystem-equivalent.html"><span class="t-lines"><span>equivalent</span></span></a></div>
|
|
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
|
|
</div>
|
|
</td>
|
|
<td>检查两个路径是否指代同一文件系统对象<br />
|
|
<span class="t-mark">(函数)</span></td>
|
|
</tr>
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="cpp-filesystem-file_size.html"><span class="t-lines"><span>file_size</span></span></a></div>
|
|
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
|
|
</div>
|
|
</td>
|
|
<td>返回文件的大小<br />
|
|
<span class="t-mark">(函数)</span></td>
|
|
</tr>
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="cpp-filesystem-hard_link_count.html"><span class="t-lines"><span>hard_link_count</span></span></a></div>
|
|
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
|
|
</div>
|
|
</td>
|
|
<td>返回指代特定文件的硬链接数<br />
|
|
<span class="t-mark">(函数)</span></td>
|
|
</tr>
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="cpp-filesystem-last_write_time.html"><span class="t-lines"><span>last_write_time</span></span></a></div>
|
|
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
|
|
</div>
|
|
</td>
|
|
<td>获取或设置最近一次数据修改的时间<br />
|
|
<span class="t-mark">(函数)</span></td>
|
|
</tr>
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="cpp-filesystem-permissions.html"><span class="t-lines"><span>permissions</span></span></a></div>
|
|
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
|
|
</div>
|
|
</td>
|
|
<td>修改文件访问权限<br />
|
|
<span class="t-mark">(函数)</span></td>
|
|
</tr>
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="cpp-filesystem-read_symlink.html"><span class="t-lines"><span>read_symlink</span></span></a></div>
|
|
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
|
|
</div>
|
|
</td>
|
|
<td>获得符号链接的目标<br />
|
|
<span class="t-mark">(函数)</span></td>
|
|
</tr>
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="cpp-filesystem-remove.html"><span class="t-lines"><span>remove</span><span>remove_all</span></span></a></div>
|
|
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
|
|
</div>
|
|
</td>
|
|
<td>移除一个文件或空目录<br />
|
|
移除一个文件或递归地移除一个目录及其所有内容<br />
|
|
<span class="t-mark">(函数)</span></td>
|
|
</tr>
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="cpp-filesystem-rename.html"><span class="t-lines"><span>rename</span></span></a></div>
|
|
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
|
|
</div>
|
|
</td>
|
|
<td>移动或重命名一个文件或目录<br />
|
|
<span class="t-mark">(函数)</span></td>
|
|
</tr>
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="cpp-filesystem-resize_file.html"><span class="t-lines"><span>resize_file</span></span></a></div>
|
|
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
|
|
</div>
|
|
</td>
|
|
<td>以截断或填充零更改一个常规文件的大小<br />
|
|
<span class="t-mark">(函数)</span></td>
|
|
</tr>
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="cpp-filesystem-space.html"><span class="t-lines"><span>space</span></span></a></div>
|
|
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
|
|
</div>
|
|
</td>
|
|
<td>确定文件系统上的可用空闲空间<br />
|
|
<span class="t-mark">(函数)</span></td>
|
|
</tr>
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="cpp-filesystem-status.html"><span class="t-lines"><span>status</span><span>symlink_status</span></span></a></div>
|
|
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
|
|
</div>
|
|
</td>
|
|
<td>确定文件属性<br />
|
|
确定文件属性，检查符号链接目标<br />
|
|
<span class="t-mark">(函数)</span></td>
|
|
</tr>
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="cpp-filesystem-temp_directory_path.html"><span class="t-lines"><span>temp_directory_path</span></span></a></div>
|
|
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
|
|
</div>
|
|
</td>
|
|
<td>返回一个适用于临时文件的目录<br />
|
|
<span class="t-mark">(函数)</span></td>
|
|
</tr>
|
|
<tr>
|
|
<td colspan="2">
|
|
<h5><span class="mw-headline" id=".E6.96.87.E4.BB.B6.E7.B1.BB.E5.9E.8B">文件类型</span></h5>
|
|
</td>
|
|
</tr>
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="cpp-filesystem-is_block_file.html"><span class="t-lines"><span>is_block_file</span></span></a></div>
|
|
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
|
|
</div>
|
|
</td>
|
|
<td>检查给定的路径是否表示块设备<br />
|
|
<span class="t-mark">(函数)</span></td>
|
|
</tr>
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="cpp-filesystem-is_character_file.html"><span class="t-lines"><span>is_character_file</span></span></a></div>
|
|
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
|
|
</div>
|
|
</td>
|
|
<td>检查给定的路径是否表示字符设备<br />
|
|
<span class="t-mark">(函数)</span></td>
|
|
</tr>
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="cpp-filesystem-is_directory.html"><span class="t-lines"><span>is_directory</span></span></a></div>
|
|
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
|
|
</div>
|
|
</td>
|
|
<td>检查给定的路径是否表示一个目录<br />
|
|
<span class="t-mark">(函数)</span></td>
|
|
</tr>
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="cpp-filesystem-is_empty.html"><span class="t-lines"><span>is_empty</span></span></a></div>
|
|
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
|
|
</div>
|
|
</td>
|
|
<td>检查给定的路径是否表示一个空文件或空目录<br />
|
|
<span class="t-mark">(函数)</span></td>
|
|
</tr>
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="cpp-filesystem-is_fifo.html"><span class="t-lines"><span>is_fifo</span></span></a></div>
|
|
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
|
|
</div>
|
|
</td>
|
|
<td>检查给定的路径是否表示一个命名管道<br />
|
|
<span class="t-mark">(函数)</span></td>
|
|
</tr>
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="cpp-filesystem-is_other.html"><span class="t-lines"><span>is_other</span></span></a></div>
|
|
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
|
|
</div>
|
|
</td>
|
|
<td>检查参数是否表示一个<i>其他</i>文件<br />
|
|
<span class="t-mark">(函数)</span></td>
|
|
</tr>
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="cpp-filesystem-is_regular_file.html"><span class="t-lines"><span>is_regular_file</span></span></a></div>
|
|
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
|
|
</div>
|
|
</td>
|
|
<td>检查参数是否表示一个常规文件<br />
|
|
<span class="t-mark">(函数)</span></td>
|
|
</tr>
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="cpp-filesystem-is_socket.html"><span class="t-lines"><span>is_socket</span></span></a></div>
|
|
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
|
|
</div>
|
|
</td>
|
|
<td>检查参数是否表示一个具名 IPC 套接字<br />
|
|
<span class="t-mark">(函数)</span></td>
|
|
</tr>
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="cpp-filesystem-is_symlink.html"><span class="t-lines"><span>is_symlink</span></span></a></div>
|
|
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
|
|
</div>
|
|
</td>
|
|
<td>检查参数是否表示一个符号链接<br />
|
|
<span class="t-mark">(函数)</span></td>
|
|
</tr>
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="cpp-filesystem-status_known.html"><span class="t-lines"><span>status_known</span></span></a></div>
|
|
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
|
|
</div>
|
|
</td>
|
|
<td>检查文件状态是否已知<br />
|
|
<span class="t-mark">(函数)</span></td>
|
|
</tr>
|
|
</table>
|
|
<h3><span class="mw-headline" id=".E6.B3.A8.E8.A7.A3">注解</span></h3>
|
|
<p>使用此库可能要求额外的编译器/链接器选项。 9.1 前的 GNU 实现要求用 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">-</span>lstdc<span class="sy2">++</span>fs</span></span> 链接，而 LLVM 9.0 前的 LLVM 实现要求用 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">-</span>lc<span class="sy2">++</span>fs</span></span> 链接。</p>
|
|
<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">参阅</span></h3>
|
|
<table class="t-dsc-begin"></table>
|
|
</div>
|
|
<div class="visualClear"></div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</body>
|
|
</html>
|