klarkxy/hustoj
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
Files
73049b71b6a595dc58fb9501b87d566cfb769e61
hustoj/web/cppreference-zh/chmhelp/cpp-filesystem-path-generic_string.html
klarkxy 196e706fe4 上传cppreference
2025-08-01 12:57:54 +08:00

189 lines
16 KiB
HTML
Raw Blame History

<!DOCTYPE html>
<html lang="zh" dir="ltr" class="client-nojs" xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh">
<head><meta http-equiv="x-ua-compatible" content="ie=edge">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>std::filesystem::path::generic_string, std::filesystem::path::generic_wstring, std::filesystem::path::generic_u8string, std::filesystem::path::generic_u16string, std::filesystem::path::generic_u32string</title>
<link rel="stylesheet" href="ext.css" />
<link rel="stylesheet" href="site_modules.css" />
</head>
<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_filesystem_path_generic_string skin-cppreference2 action-view cpp-navbar">
<div id="cpp-content-base">
<div id="content"><a id="top"></a>
<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::filesystem::path::</span>generic_string, <span style="font-size:0.7em; line-height:130%">std::filesystem::path::</span>generic_wstring, <span style="font-size:0.7em; line-height:130%">std::filesystem::path::</span>generic_u8string, <span style="font-size:0.7em; line-height:130%">std::filesystem::path::</span>generic_u16string, <span style="font-size:0.7em; line-height:130%">std::filesystem::path::</span>generic_u32string</h1>
<div id="bodyContent">
<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>
<div id="mw-content-text" lang="zh" dir="ltr" class="mw-content-ltr" xml:lang="zh">
<table class="t-dcl-begin">
<tbody>
<tr class="t-dcl t-since-cxx17">
<td>
<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">=</span> <a href="cpp-string-char_traits.html"><span class="kw1267">std::<span class="me2">char_traits</span></span></a><span class="sy1">&lt;</span>CharT<span class="sy1">&gt;</span>,<br /></span>
<p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <span class="kw1">class</span> Alloc <span class="sy1">=</span> <a href="cpp-memory-allocator.html"><span class="kw700">std::<span class="me2">allocator</span></span></a><span class="sy1">&lt;</span>CharT<span class="sy1">&gt;</span> <span class="sy1">&gt;</span><br />
<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, Alloc<span class="sy1">&gt;</span><br /></p>
&nbsp; &nbsp; generic_string<span class="br0">(</span> <span class="kw4">const</span> Alloc<span class="sy3">&amp;</span> a <span class="sy1">=</span> Alloc<span class="br0">(</span><span class="br0">)</span> <span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span></div>
</td>
<td>(1)</td>
<td><span class="t-mark-rev t-since-cxx17">(C++17 &#36215;)</span></td>
</tr>
</tbody>
<tbody class="t-dcl-rev t-dcl-rev-num t-dcl-rev-notes t-since-cxx17">
<tr class="t-dcl-rev-aux">
<td></td>
<td rowspan="142">(2)</td>
<td rowspan="142"><span class="t-mark-rev t-since-cxx17">(C++17 &#36215;)</span></td>
</tr>
<tr class="t-dcl">
<td class="t-dcl-nopad">
<div><span class="mw-geshi cpp source-cpp"><a href="cpp-string-basic_string.html"><span class="kw1230">std::<span class="me2">string</span></span></a> generic_string<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span></span></div>
</td>
<td class="t-dcl-nopad"></td>
<td class="t-dcl-nopad"></td>
</tr>
<tr class="t-dcl">
<td class="t-dcl-nopad">
<div><span class="mw-geshi cpp source-cpp"><a href="cpp-string-basic_string.html"><span class="kw1232">std::<span class="me2">wstring</span></span></a> generic_wstring<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span></span></div>
</td>
<td class="t-dcl-nopad"></td>
<td class="t-dcl-nopad"></td>
</tr>
<tr class="t-dcl">
<td class="t-dcl-nopad">
<div><span class="mw-geshi cpp source-cpp"><a href="cpp-string-basic_string.html"><span class="kw1234">std::<span class="me2">u16string</span></span></a> generic_u16string<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span></span></div>
</td>
<td class="t-dcl-nopad"></td>
<td class="t-dcl-nopad"></td>
</tr>
<tr class="t-dcl">
<td class="t-dcl-nopad">
<div><span class="mw-geshi cpp source-cpp"><a href="cpp-string-basic_string.html"><span class="kw1236">std::<span class="me2">u32string</span></span></a> generic_u32string<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span></span></div>
</td>
<td class="t-dcl-nopad"></td>
<td class="t-dcl-nopad"></td>
</tr>
</tbody>
<tbody></tbody>
<tbody class="t-dcl-rev t-dcl-rev-num">
<tr class="t-dcl-rev-aux">
<td></td>
<td rowspan="142">(3)</td>
<td></td>
</tr>
<tr class="t-dcl t-since-cxx17 t-until-cxx20">
<td>
<div><span class="mw-geshi cpp source-cpp"><a href="cpp-string-basic_string.html"><span class="kw1230">std::<span class="me2">string</span></span></a> generic_u8string<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span></span></div>
</td>
<td class="t-dcl-nopad"></td>
<td><span class="t-mark-rev t-since-cxx17">(C++17 &#36215;)</span><br />
<span class="t-mark-rev t-until-cxx20">(C++20 &#21069;)</span></td>
</tr>
<tr class="t-dcl t-since-cxx20">
<td>
<div><span class="mw-geshi cpp source-cpp">std<span class="sy4">::</span><span class="me2">u8string</span> generic_u8string<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span></span></div>
</td>
<td class="t-dcl-nopad"></td>
<td><span class="t-mark-rev t-since-cxx20">(C++20 &#36215;)</span></td>
</tr>
</tbody>
<tbody>
<tr class="t-dcl-sep">
<td></td>
<td></td>
<td></td>
</tr>
</tbody>
</table>
<p>&#36820;&#22238;&#36890;&#29992;&#36335;&#24452;&#21517;&#26684;&#24335;&#30340;&#20869;&#37096;&#36335;&#24452;&#21517;&#65292;&#36716;&#25442;&#21040;&#25351;&#23450;&#30340;&#23383;&#31526;&#20018;&#26684;&#24335;&#12290;&#33509;&#23384;&#22312;&#36716;&#25442;&#65292;&#21017;&#25353;&#19979;&#21015;&#26041;&#24335;&#36827;&#34892;&#65306;</p>
<div class="t-template-editlink" style=""></div>
<ul>
<li>&#33509; <code>path::value_type</code> &#26159; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">char</span></span></span> &#65292;&#33509;&#36716;&#25442;&#23384;&#22312;&#65292;&#21017;&#36716;&#25442;&#26159;&#20381;&#36182;&#31995;&#32479;&#30340;&#12290;&#36825;&#26159;&#22312;&#20856;&#22411; POSIX &#31995;&#32479;&#65288;&#20363;&#22914; Linux &#65289;&#19978;&#30340;&#24773;&#24418;&#65292;&#20854;&#20013;&#21407;&#29983;&#23383;&#31526;&#32534;&#30721;&#26159; UTF-8 &#19988; <code>string()</code> &#19981;&#36827;&#34892;&#36716;&#25442;&#12290;</li>
<li>&#21542;&#21017;&#65292;&#33509; <code>path::value_type</code> &#26159; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">wchar_t</span></span></span> &#65292;&#33509;&#36716;&#25442;&#23384;&#22312;&#65292;&#21017;&#26159;&#26410;&#25351;&#23450;&#30340;&#12290;&#36825;&#26159;&#22312; Windows &#19978;&#30340;&#24773;&#24418;&#65292;&#20854;&#20013; wchar_t &#20026; 16 &#20301;&#19988;&#21407;&#29983;&#32534;&#30721;&#20026; UTF-16 &#12290;</li>
<li>&#21542;&#21017;&#65292;&#33509; <code>path::value_type</code> &#26159; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">char16_t</span></span></span> &#65292;&#21017;&#21407;&#29983;&#32534;&#30721;&#26159; UTF-16 &#32780;&#36716;&#25442;&#26041;&#27861;&#26410;&#25351;&#23450;&#12290;</li>
<li>&#21542;&#21017;&#65292;&#33509; <code>path::value_type</code> &#26159; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">char32_t</span></span></span> &#65292;&#21017;&#21407;&#29983;&#32534;&#30721;&#26159; UTF-32 &#32780;&#36716;&#25442;&#26041;&#27861;&#26410;&#25351;&#23450;&#12290;</li>
<li>&#21542;&#21017;&#65292;&#33509; <code>path::value_type</code> &#26159; <span class="t-c"><span class="mw-geshi cpp source-cpp">char8_t</span></span> &#65292;&#21017;&#21407;&#29983;&#32534;&#30721;&#26159; UTF-8 &#32780;&#36716;&#25442;&#26041;&#27861;&#26410;&#25351;&#23450;&#12290;</li>
</ul>
<p>&#20197; <code>/</code> &#23383;&#31526;&#20026;&#20316;&#30446;&#24405;&#20998;&#38548;&#31526;&#12290;</p>
<div class="t-li1"><span class="t-li">1)</span> &#25152;&#26377;&#20869;&#23384;&#20998;&#37197;&#30001; <code>a</code> &#36827;&#34892;&#12290;</div>
<div class="t-li1"><span class="t-li">3)</span> <code>u8string()</code> &#24773;&#24418;&#19979;&#32467;&#26524;&#30340;&#32534;&#30721;&#22987;&#32456;&#26159; UTF-8 &#12290;</div>
<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">&#21442;&#25968;</span></h3>
<table class="t-par-begin">
<tr class="t-par">
<td>a</td>
<td>-</td>
<td>&#26500;&#36896;&#23383;&#31526;&#20018;&#29992;&#30340;&#20998;&#37197;&#22120;</td>
</tr>
<tr class="t-par-hitem">
<td colspan="3">&#31867;&#22411;&#35201;&#27714;</td>
</tr>
<tr class="t-par-req">
<td colspan="3">-
<div class="spacer"></div>
<code>CharT</code> &#24517;&#39035;&#26159;&#32534;&#30721;&#23383;&#31526;&#31867;&#22411;&#20043;&#19968;&#65288; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">char</span></span></span>&#12289; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">wchar_t</span></span></span><span class="t-rev-inl t-since-cxx20"><span>&#12289; <span class="t-c"><span class="mw-geshi cpp source-cpp">char8_t</span></span></span> <span><span class="t-mark-rev t-since-cxx20">(C++20 &#36215;)</span></span></span>&#12289; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">char16_t</span></span></span> &#21450; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">char32_t</span></span></span> &#65289;</td>
</tr>
</table>
<h3><span class="mw-headline" id=".E8.BF.94.E5.9B.9E.E5.80.BC">&#36820;&#22238;&#20540;</span></h3>
<p>&#36890;&#29992;&#36335;&#24452;&#21517;&#26684;&#24335;&#30340;&#20869;&#37096;&#36335;&#24452;&#21517;&#65292;&#36716;&#25442;&#21040;&#25351;&#23450;&#30340;&#23383;&#31526;&#20018;&#31867;&#22411;&#12290;</p>
<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=".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;cstddef&gt;</span>
<span class="co2">#include &lt;filesystem&gt;</span>
<span class="co2">#include &lt;iomanip&gt;</span>
<span class="co2">#include &lt;iostream&gt;</span>
<span class="co2">#include &lt;span&gt;</span>
<span class="co2">#include &lt;string_view&gt;</span>
<span class="kw4">void</span> print<span class="br0">(</span><a href="cpp-string-basic_string_view.html"><span class="kw1248">std::<span class="me2">string_view</span></span></a> rem, <span class="kw4">auto</span> <span class="kw4">const</span><span class="sy3">&amp;</span> str<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> rem <span class="sy1">&lt;&lt;</span> <a href="cpp-io-manip-hex.html"><span class="kw1782">std::<span class="me2">hex</span></span></a> <span class="sy1">&lt;&lt;</span> <a href="cpp-io-manip-uppercase.html"><span class="kw1774">std::<span class="me2">uppercase</span></span></a> <span class="sy1">&lt;&lt;</span> <a href="cpp-io-manip-setfill.html"><span class="kw1795">std::<span class="me2">setfill</span></span></a><span class="br0">(</span><span class="st0">&#39;0&#39;</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">for</span> <span class="br0">(</span><span class="kw4">const</span> <span class="kw4">auto</span> b <span class="sy4">:</span> std<span class="sy4">::</span><span class="me2">as_bytes</span><span class="br0">(</span>std<span class="sy4">::</span><span class="me2">span</span><span class="br0">{</span>str<span class="br0">}</span><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-io-manip-setw.html"><span class="kw1797">std::<span class="me2">setw</span></span></a><span class="br0">(</span><span class="nu0">2</span><span class="br0">)</span> <span class="sy1">&lt;&lt;</span> std<span class="sy4">::</span><span class="me2">to_integer</span><span class="sy1">&lt;</span><span class="kw4">unsigned</span><span class="sy1">&gt;</span><span class="br0">(</span>b<span class="br0">)</span> <span class="sy1">&lt;&lt;</span> <span class="st0">&#39; &#39;</span><span class="sy4">;</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">&#39;<span class="es1">\n</span>&#39;</span><span class="sy4">;</span>
<span class="br0">}</span>
<span class="kw4">int</span> main<span class="br0">(</span><span class="br0">)</span>
<span class="br0">{</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> p<span class="br0">{</span><span class="st0">&quot;/&#23478;/&#23627;&quot;</span><span class="br0">}</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> p <span class="sy1">&lt;&lt;</span> <span class="st0">&#39;<span class="es1">\n</span>&#39;</span><span class="sy4">;</span>
print<span class="br0">(</span><span class="st0">&quot;string : &quot;</span>, p.<span class="me1">generic_string</span> <span class="br0">(</span><span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span>
print<span class="br0">(</span><span class="st0">&quot;u8string : &quot;</span>, p.<span class="me1">generic_u8string</span> <span class="br0">(</span><span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span>
print<span class="br0">(</span><span class="st0">&quot;u16string : &quot;</span>, p.<span class="me1">generic_u16string</span><span class="br0">(</span><span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span>
print<span class="br0">(</span><span class="st0">&quot;u32string : &quot;</span>, p.<span class="me1">generic_u32string</span><span class="br0">(</span><span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// print(&quot;wstring : &quot;, p.generic_wstring ());</span>
<span class="co1">// gcc-11.0.0 2020.12.30 &#20173;&#28982;&#22833;&#36133;&#65292; clang-10 - ok</span>
<span class="br0">}</span></pre></div>
</div>
<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;/&#23478;/&#23627;&quot;
string : 2F E5 AE B6 2F E5 B1 8B
u8string : 2F E5 AE B6 2F E5 B1 8B
u16string : 2F 00 B6 5B 2F 00 4B 5C
u32string : 2F 00 00 00 B6 5B 00 00 2F 00 00 00 4B 5C 00 00</pre></div>
</div>
</div>
<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">&#21442;&#38405;</span></h3>
<table class="t-dsc-begin">
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-filesystem-path-string.html"><span class="t-lines"><span>string</span><span>wstring</span><span>u8string</span><span>u16string</span><span>u32string</span></span></a></div>
</div>
</td>
<td>&#36820;&#22238;&#36716;&#25442;&#21040;&#23383;&#31526;&#20018;&#30340;&#21407;&#29983;&#36335;&#24452;&#21517;&#26684;&#24335;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
</table>
</div>
<div class="visualClear"></div>
</div>
</div>
</div>
</body>
</html>
Reference in New Issue View Git Blame Copy Permalink