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<!DOCTYPE html>
<html lang="zh" dir="ltr" class="client-nojs" xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh">
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<title>&#26631;&#20934;&#24211;&#22836;&#25991;&#20214; &lt;string&gt;</title>
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">&#26631;&#20934;&#24211;&#22836;&#25991;&#20214;</span> &lt;string&gt;</h1>
<div id="bodyContent">
<div id="contentSub"><span class="subpages">&lt; <a href="cpp.html">cpp</a>&lrm; | <a href="cpp-header.html">header</a></span></div>
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<p>&#27492;&#22836;&#25991;&#20214;&#26159;<a href="cpp-string.html">&#23383;&#31526;&#20018;</a>&#24211;&#30340;&#19968;&#37096;&#20998;&#12290;</p>
<table class="t-dsc-begin">
<tr>
<td colspan="2">
<h3><span class="mw-headline" id=".E5.8C.85.E5.90.AB">&#21253;&#21547;</span></h3>
</td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-header-compare.html"><span class="t-lines"><span>&lt;compare&gt;</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
</div>
</td>
<td><a href="cpp-language-operator_comparison.html#.E4.B8.89.E8.B7.AF.E6.AF.94.E8.BE.83">&#19977;&#36335;&#27604;&#36739;&#36816;&#31639;&#31526;</a>&#25903;&#25345;</td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-header-initializer_list.html"><span class="t-lines"><span>&lt;initializer_list&gt;</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
</div>
</td>
<td><span class="t-lc"><a href="cpp-utility-initializer_list.html">std::initializer_list</a></span> &#31867;&#27169;&#26495;</td>
</tr>
<tr>
<td colspan="2">
<h3><span class="mw-headline" id=".E7.B1.BB">&#31867;</span></h3>
</td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-string-char_traits.html"><span class="t-lines"><span>char_traits</span></span></a></div>
</div>
</td>
<td>&#25551;&#36848;&#23383;&#31526;&#31867;&#22411;&#30340;&#24615;&#36136;&#30340;&#31867;&#27169;&#26495;<br />
<span class="t-mark">(&#31867;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-string-char_traits.html"><span class="kw1267">std::<span class="me2">char_traits</span></span></a><span class="sy1">&lt;</span><span class="kw4">char</span><span class="sy1">&gt;</span></span></span></td>
<td><span class="t-mark">(&#31867;&#27169;&#26495;&#29305;&#21270;)</span></td>
</tr>
<tr class="t-dsc">
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-string-char_traits.html"><span class="kw1267">std::<span class="me2">char_traits</span></span></a><span class="sy1">&lt;</span><span class="kw4">wchar_t</span><span class="sy1">&gt;</span></span></span></td>
<td><span class="t-mark">(&#31867;&#27169;&#26495;&#29305;&#21270;)</span></td>
</tr>
<tr class="t-dsc">
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-string-char_traits.html"><span class="kw1267">std::<span class="me2">char_traits</span></span></a><span class="sy1">&lt;</span>char8_t<span class="sy1">&gt;</span></span></span> <span class="t-mark-rev t-since-cxx20">(C++20)</span></td>
<td><span class="t-mark">(&#31867;&#27169;&#26495;&#29305;&#21270;)</span></td>
</tr>
<tr class="t-dsc">
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-string-char_traits.html"><span class="kw1267">std::<span class="me2">char_traits</span></span></a><span class="sy1">&lt;</span><span class="kw4">char16_t</span><span class="sy1">&gt;</span></span></span> <span class="t-mark-rev t-since-cxx11">(C++11)</span></td>
<td><span class="t-mark">(&#31867;&#27169;&#26495;&#29305;&#21270;)</span></td>
</tr>
<tr class="t-dsc">
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-string-char_traits.html"><span class="kw1267">std::<span class="me2">char_traits</span></span></a><span class="sy1">&lt;</span><span class="kw4">char32_t</span><span class="sy1">&gt;</span></span></span> <span class="t-mark-rev t-since-cxx11">(C++11)</span></td>
<td><span class="t-mark">(&#31867;&#27169;&#26495;&#29305;&#21270;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-string-basic_string.html"><span class="t-lines"><span>basic_string</span></span></a></div>
</div>
</td>
<td>&#23384;&#20648;&#24182;&#25805;&#20316;&#23383;&#31526;&#24207;&#21015;<br />
<span class="t-mark">(&#31867;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td><span class="t-lc"><a href="cpp-string-basic_string.html">std::string</a></span></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-string-basic_string.html"><span class="kw1228">std::<span class="me2">basic_string</span></span></a><span class="sy1">&lt;</span><span class="kw4">char</span><span class="sy1">&gt;</span></span></span> <span class="t-mark">(typedef)</span></td>
</tr>
<tr class="t-dsc">
<td><span class="t-lc">std::u8string</span> <span class="t-mark-rev t-since-cxx20">(C++20)</span></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-string-basic_string.html"><span class="kw1228">std::<span class="me2">basic_string</span></span></a><span class="sy1">&lt;</span>char8_t<span class="sy1">&gt;</span></span></span> <span class="t-mark">(typedef)</span></td>
</tr>
<tr class="t-dsc">
<td><span class="t-lc"><a href="cpp-string-basic_string.html">std::u16string</a></span> <span class="t-mark-rev t-since-cxx11">(C++11)</span></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-string-basic_string.html"><span class="kw1228">std::<span class="me2">basic_string</span></span></a><span class="sy1">&lt;</span><span class="kw4">char16_t</span><span class="sy1">&gt;</span></span></span> <span class="t-mark">(typedef)</span></td>
</tr>
<tr class="t-dsc">
<td><span class="t-lc"><a href="cpp-string-basic_string.html">std::u32string</a></span> <span class="t-mark-rev t-since-cxx11">(C++11)</span></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-string-basic_string.html"><span class="kw1228">std::<span class="me2">basic_string</span></span></a><span class="sy1">&lt;</span><span class="kw4">char32_t</span><span class="sy1">&gt;</span></span></span> <span class="t-mark">(typedef)</span></td>
</tr>
<tr class="t-dsc">
<td><span class="t-lc"><a href="cpp-string-basic_string.html">std::wstring</a></span></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-string-basic_string.html"><span class="kw1228">std::<span class="me2">basic_string</span></span></a><span class="sy1">&lt;</span><span class="kw4">wchar_t</span><span class="sy1">&gt;</span></span></span> <span class="t-mark">(typedef)</span></td>
</tr>
<tr class="t-dsc">
<td><span class="t-lc">std::pmr::basic_string</span> <span class="t-mark-rev t-since-cxx17">(C++17)</span></td>
<td><span class="t-mark">(&#21035;&#21517;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td><span class="t-lc"><a href="cpp-string-basic_string.html">std::pmr::string</a></span> <span class="t-mark-rev t-since-cxx17">(C++17)</span></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">std<span class="sy4">::</span><span class="me2">pmr</span><span class="sy4">::</span><span class="me2">basic_string</span><span class="sy1">&lt;</span><span class="kw4">char</span><span class="sy1">&gt;</span></span></span> <span class="t-mark">(typedef)</span></td>
</tr>
<tr class="t-dsc">
<td><span class="t-lc">std::pmr::u8string</span> <span class="t-mark-rev t-since-cxx20">(C++20)</span></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">std<span class="sy4">::</span><span class="me2">pmr</span><span class="sy4">::</span><span class="me2">basic_string</span><span class="sy1">&lt;</span>char8_t<span class="sy1">&gt;</span></span></span> <span class="t-mark">(typedef)</span></td>
</tr>
<tr class="t-dsc">
<td><span class="t-lc"><a href="cpp-string-basic_string.html">std::pmr::u16string</a></span> <span class="t-mark-rev t-since-cxx17">(C++17)</span></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">std<span class="sy4">::</span><span class="me2">pmr</span><span class="sy4">::</span><span class="me2">basic_string</span><span class="sy1">&lt;</span><span class="kw4">char16_t</span><span class="sy1">&gt;</span></span></span> <span class="t-mark">(typedef)</span></td>
</tr>
<tr class="t-dsc">
<td><span class="t-lc"><a href="cpp-string-basic_string.html">std::pmr::u32string</a></span> <span class="t-mark-rev t-since-cxx17">(C++17)</span></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">std<span class="sy4">::</span><span class="me2">pmr</span><span class="sy4">::</span><span class="me2">basic_string</span><span class="sy1">&lt;</span><span class="kw4">char32_t</span><span class="sy1">&gt;</span></span></span> <span class="t-mark">(typedef)</span></td>
</tr>
<tr class="t-dsc">
<td><span class="t-lc"><a href="cpp-string-basic_string.html">std::pmr::wstring</a></span> <span class="t-mark-rev t-since-cxx17">(C++17)</span></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">std<span class="sy4">::</span><span class="me2">pmr</span><span class="sy4">::</span><span class="me2">basic_string</span><span class="sy1">&lt;</span><span class="kw4">wchar_t</span><span class="sy1">&gt;</span></span></span> <span class="t-mark">(typedef)</span></td>
</tr>
<tr class="t-dsc">
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-utility-hash.html"><span class="kw1124">std::<span class="me2">hash</span></span></a><span class="sy1">&lt;</span><a href="cpp-string-basic_string.html"><span class="kw1230">std::<span class="me2">string</span></span></a><span class="sy1">&gt;</span></span></span> <span class="t-mark-rev t-since-cxx11">(C++11)</span></td>
<td><span class="t-mark">(&#31867;&#27169;&#26495;&#29305;&#21270;)</span></td>
</tr>
<tr class="t-dsc">
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-utility-hash.html"><span class="kw1124">std::<span class="me2">hash</span></span></a><span class="sy1">&lt;</span>std<span class="sy4">::</span><span class="me2">u8string</span><span class="sy1">&gt;</span></span></span> <span class="t-mark-rev t-since-cxx20">(C++20)</span></td>
<td><span class="t-mark">(&#31867;&#27169;&#26495;&#29305;&#21270;)</span></td>
</tr>
<tr class="t-dsc">
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-utility-hash.html"><span class="kw1124">std::<span class="me2">hash</span></span></a><span class="sy1">&lt;</span><a href="cpp-string-basic_string.html"><span class="kw1234">std::<span class="me2">u16string</span></span></a><span class="sy1">&gt;</span></span></span> <span class="t-mark-rev t-since-cxx11">(C++11)</span></td>
<td><span class="t-mark">(&#31867;&#27169;&#26495;&#29305;&#21270;)</span></td>
</tr>
<tr class="t-dsc">
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-utility-hash.html"><span class="kw1124">std::<span class="me2">hash</span></span></a><span class="sy1">&lt;</span><a href="cpp-string-basic_string.html"><span class="kw1236">std::<span class="me2">u32string</span></span></a><span class="sy1">&gt;</span></span></span> <span class="t-mark-rev t-since-cxx11">(C++11)</span></td>
<td><span class="t-mark">(&#31867;&#27169;&#26495;&#29305;&#21270;)</span></td>
</tr>
<tr class="t-dsc">
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-utility-hash.html"><span class="kw1124">std::<span class="me2">hash</span></span></a><span class="sy1">&lt;</span><a href="cpp-string-basic_string.html"><span class="kw1232">std::<span class="me2">wstring</span></span></a><span class="sy1">&gt;</span></span></span> <span class="t-mark-rev t-since-cxx11">(C++11)</span></td>
<td><span class="t-mark">(&#31867;&#27169;&#26495;&#29305;&#21270;)</span></td>
</tr>
<tr class="t-dsc">
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-utility-hash.html"><span class="kw1124">std::<span class="me2">hash</span></span></a><span class="sy1">&lt;</span><a href="cpp-string-basic_string.html"><span class="kw1238">std::<span class="me2">pmr</span><span class="sy4">::</span><span class="me2">string</span></span></a><span class="sy1">&gt;</span></span></span> <span class="t-mark-rev t-since-cxx20">(C++20)</span></td>
<td><span class="t-mark">(&#31867;&#27169;&#26495;&#29305;&#21270;)</span></td>
</tr>
<tr class="t-dsc">
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-utility-hash.html"><span class="kw1124">std::<span class="me2">hash</span></span></a><span class="sy1">&lt;</span>std<span class="sy4">::</span><span class="me2">pmr</span><span class="sy4">::</span><span class="me2">u8string</span><span class="sy1">&gt;</span></span></span> <span class="t-mark-rev t-since-cxx20">(C++20)</span></td>
<td><span class="t-mark">(&#31867;&#27169;&#26495;&#29305;&#21270;)</span></td>
</tr>
<tr class="t-dsc">
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-utility-hash.html"><span class="kw1124">std::<span class="me2">hash</span></span></a><span class="sy1">&lt;</span><a href="cpp-string-basic_string.html"><span class="kw1242">std::<span class="me2">pmr</span><span class="sy4">::</span><span class="me2">u16string</span></span></a><span class="sy1">&gt;</span></span></span> <span class="t-mark-rev t-since-cxx20">(C++20)</span></td>
<td><span class="t-mark">(&#31867;&#27169;&#26495;&#29305;&#21270;)</span></td>
</tr>
<tr class="t-dsc">
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-utility-hash.html"><span class="kw1124">std::<span class="me2">hash</span></span></a><span class="sy1">&lt;</span><a href="cpp-string-basic_string.html"><span class="kw1244">std::<span class="me2">pmr</span><span class="sy4">::</span><span class="me2">u32string</span></span></a><span class="sy1">&gt;</span></span></span> <span class="t-mark-rev t-since-cxx20">(C++20)</span></td>
<td><span class="t-mark">(&#31867;&#27169;&#26495;&#29305;&#21270;)</span></td>
</tr>
<tr class="t-dsc">
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-utility-hash.html"><span class="kw1124">std::<span class="me2">hash</span></span></a><span class="sy1">&lt;</span><a href="cpp-string-basic_string.html"><span class="kw1240">std::<span class="me2">pmr</span><span class="sy4">::</span><span class="me2">wstring</span></span></a><span class="sy1">&gt;</span></span></span> <span class="t-mark-rev t-since-cxx20">(C++20)</span></td>
<td><span class="t-mark">(&#31867;&#27169;&#26495;&#29305;&#21270;)</span></td>
</tr>
<tr>
<td colspan="2">
<h3><span class="mw-headline" id=".E5.87.BD.E6.95.B0">&#20989;&#25968;</span></h3>
</td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-string-basic_string-operator+.html"><span class="t-lines"><span>operator+</span></span></a></div>
</div>
</td>
<td>&#36830;&#25509;&#20004;&#20010;&#23383;&#31526;&#20018;&#25110;&#32773;&#19968;&#20010;&#23383;&#31526;&#20018;&#21644;&#19968;&#20010;&#23383;&#31526;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-string-basic_string-operator_cmp.html"><span class="t-lines"><span>operator==</span><span>operator!=</span><span>operator&lt;</span><span>operator&gt;</span><span>operator&lt;=</span><span>operator&gt;=</span><span>operator&lt;=&gt;</span></span></a></div>
<div><span class="t-lines"><span></span><span><span class="t-mark-rev t-until-cxx20">(C++20 &#20013;&#31227;&#38500;)</span></span><span><span class="t-mark-rev t-until-cxx20">(C++20 &#20013;&#31227;&#38500;)</span></span><span><span class="t-mark-rev t-until-cxx20">(C++20 &#20013;&#31227;&#38500;)</span></span><span><span class="t-mark-rev t-until-cxx20">(C++20 &#20013;&#31227;&#38500;)</span></span><span><span class="t-mark-rev t-until-cxx20">(C++20 &#20013;&#31227;&#38500;)</span></span><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
</div>
</td>
<td>&#20197;&#23383;&#20856;&#24207;&#27604;&#36739;&#20004;&#20010;&#23383;&#31526;&#20018;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-string-basic_string-swap2.html"><span class="t-lines"><span>std::swap<span class="t-dsc-small">(std::basic_string)</span></span></span></a></div>
</div>
</td>
<td>&#29305;&#21270; <span class="t-lc"><a href="cpp-algorithm-swap.html">std::swap</a></span> &#31639;&#27861;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
<tr>
<td colspan="2">
<h5><span class="mw-headline" id=".E8.BE.93.E5.85.A5.2F.E8.BE.93.E5.87.BA">&#36755;&#20837;/&#36755;&#20986;</span></h5>
</td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-string-basic_string-operator_ltltgtgt.html"><span class="t-lines"><span>operator&lt;&lt;</span><span>operator&gt;&gt;</span></span></a></div>
</div>
</td>
<td>&#25191;&#34892;&#23383;&#31526;&#20018;&#30340;&#27969;&#36755;&#20837;&#19982;&#36755;&#20986;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-string-basic_string-getline.html"><span class="t-lines"><span>getline</span></span></a></div>
</div>
</td>
<td>&#20174; I/O &#27969;&#35835;&#21462;&#25968;&#25454;&#21040;&#23383;&#31526;&#20018;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
<tr>
<td colspan="2">
<h5><span class="mw-headline" id=".E6.95.B0.E5.80.BC.E8.BD.AC.E6.8D.A2">&#25968;&#20540;&#36716;&#25442;</span></h5>
</td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-string-basic_string-stol.html"><span class="t-lines"><span>stoi</span><span>stol</span><span>stoll</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
</div>
</td>
<td>&#36716;&#25442;&#23383;&#31526;&#20018;&#20026;&#26377;&#31526;&#21495;&#25972;&#25968;<br />
<span class="t-mark">(&#20989;&#25968;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-string-basic_string-stoul.html"><span class="t-lines"><span>stoul</span><span>stoull</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
</div>
</td>
<td>&#36716;&#25442;&#23383;&#31526;&#20018;&#20026;&#26080;&#31526;&#21495;&#25972;&#25968;<br />
<span class="t-mark">(&#20989;&#25968;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-string-basic_string-stof.html"><span class="t-lines"><span>stof</span><span>stod</span><span>stold</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
</div>
</td>
<td>&#36716;&#25442;&#23383;&#31526;&#20018;&#20026;&#28014;&#28857;&#20540;<br />
<span class="t-mark">(&#20989;&#25968;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-string-basic_string-to_string.html"><span class="t-lines"><span>to_string</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
</div>
</td>
<td>&#36716;&#25442;&#25972;&#25968;&#25110;&#28014;&#28857;&#20540;&#20026; <code>string</code><br />
<span class="t-mark">(&#20989;&#25968;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-string-basic_string-to_wstring.html"><span class="t-lines"><span>to_wstring</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
</div>
</td>
<td>&#36716;&#25442;&#25972;&#25968;&#25110;&#28014;&#28857;&#20540;&#20026; <code>wstring</code><br />
<span class="t-mark">(&#20989;&#25968;)</span></td>
</tr>
<tr>
<td colspan="2">
<h5><span class="mw-headline" id=".E8.8C.83.E5.9B.B4.E8.AE.BF.E9.97.AE">&#33539;&#22260;&#35775;&#38382;</span></h5>
</td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-iterator-begin.html"><span class="t-lines"><span>begin</span><span>cbegin</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span><span><span class="t-mark-rev t-since-cxx14">(C++14)</span></span></span></div>
</div>
</td>
<td>&#36820;&#22238;&#25351;&#21521;&#23481;&#22120;&#25110;&#25968;&#32452;&#36215;&#22987;&#30340;&#36845;&#20195;&#22120;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-iterator-end.html"><span class="t-lines"><span>end</span><span>cend</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span><span><span class="t-mark-rev t-since-cxx14">(C++14)</span></span></span></div>
</div>
</td>
<td>&#36820;&#22238;&#25351;&#21521;&#23481;&#22120;&#25110;&#25968;&#32452;&#32467;&#23614;&#30340;&#36845;&#20195;&#22120;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-iterator-rbegin.html"><span class="t-lines"><span>rbegin</span><span>crbegin</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx14">(C++14)</span></span></span></div>
</div>
</td>
<td>&#36820;&#22238;&#25351;&#21521;&#19968;&#20010;&#23481;&#22120;&#25110;&#25968;&#32452;&#30340;&#36870;&#21521;&#36845;&#20195;&#22120;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-iterator-rend.html"><span class="t-lines"><span>rend</span><span>crend</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx14">(C++14)</span></span></span></div>
</div>
</td>
<td>&#36820;&#22238;&#23481;&#22120;&#25110;&#25968;&#32452;&#30340;&#36870;&#21521;&#23614;&#36845;&#20195;&#22120;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-iterator-size.html"><span class="t-lines"><span>size</span><span>ssize</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-cxx20">(C++20)</span></span></span></div>
</div>
</td>
<td>&#36820;&#22238;&#23481;&#22120;&#25110;&#25968;&#32452;&#30340;&#22823;&#23567;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-iterator-empty.html"><span class="t-lines"><span>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>&#26816;&#26597;&#23481;&#22120;&#26159;&#21542;&#20026;&#31354;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-iterator-data.html"><span class="t-lines"><span>data</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>&#33719;&#24471;&#25351;&#21521;&#24213;&#23618;&#25968;&#32452;&#30340;&#25351;&#38024;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
<tr>
<td colspan="2">
<h5><span class="mw-headline" id=".E5.AD.97.E9.9D.A2.E9.87.8F">&#23383;&#38754;&#37327;</span></h5>
</td>
</tr>
<tr class="t-dsc-header">
<td colspan="2">
<div>&#23450;&#20041;&#20110;&#20869;&#32852;&#21629;&#21517;&#31354;&#38388; <code>std::literals::string_literals</code></div>
</td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-string-basic_string-operator_22_22s.html"><span class="t-lines"><span>operator&quot;&quot;s</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx14">(C++14)</span></span></span></div>
</div>
</td>
<td>&#36716;&#25442;&#23383;&#31526;&#25968;&#32452;&#23383;&#38754;&#37327;&#20026; <code>basic_string</code><br />
<span class="t-mark">(&#20989;&#25968;)</span></td>
</tr>
</table>
<h3><span class="mw-headline" id=".E6.A6.82.E8.A6.81">&#27010;&#35201;</span></h3>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="cpp source-cpp">
<pre class="de1"><span class="co2">#include &lt;compare&gt;</span>
<span class="co2">#include &lt;initializer_list&gt;</span>
<span class="kw1">namespace</span> std <span class="br0">{</span>
<span class="co1">// &#23383;&#31526;&#29305;&#24449;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> charT<span class="sy1">&gt;</span> <span class="kw1">struct</span> char_traits<span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;&gt;</span> <span class="kw1">struct</span> char_traits<span class="sy1">&lt;</span><span class="kw4">char</span><span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;&gt;</span> <span class="kw1">struct</span> char_traits<span class="sy1">&lt;</span>char8_t<span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;&gt;</span> <span class="kw1">struct</span> char_traits<span class="sy1">&lt;</span><span class="kw4">char16_t</span><span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;&gt;</span> <span class="kw1">struct</span> char_traits<span class="sy1">&lt;</span><span class="kw4">char32_t</span><span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;&gt;</span> <span class="kw1">struct</span> char_traits<span class="sy1">&lt;</span><span class="kw4">wchar_t</span><span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="co1">// basic_string</span>
<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> char_traits<span class="sy1">&lt;</span>CharT<span class="sy1">&gt;</span>,
<span class="kw1">class</span> Allocator <span class="sy1">=</span> allocator<span class="sy1">&lt;</span>CharT<span class="sy1">&gt;&gt;</span>
<span class="kw1">class</span> basic_string<span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits, <span class="kw1">class</span> Allocator<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span>
operator<span class="sy2">+</span><span class="br0">(</span><span class="kw4">const</span> basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span><span class="sy3">&amp;</span> lhs,
<span class="kw4">const</span> basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span><span class="sy3">&amp;</span> rhs<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits, <span class="kw1">class</span> Allocator<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span>
operator<span class="sy2">+</span><span class="br0">(</span>basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span><span class="sy3">&amp;&amp;</span> lhs,
<span class="kw4">const</span> basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span><span class="sy3">&amp;</span> rhs<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits, <span class="kw1">class</span> Allocator<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span>
operator<span class="sy2">+</span><span class="br0">(</span><span class="kw4">const</span> basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span><span class="sy3">&amp;</span> lhs,
basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span><span class="sy3">&amp;&amp;</span> rhs<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits, <span class="kw1">class</span> Allocator<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span>
operator<span class="sy2">+</span><span class="br0">(</span>basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span><span class="sy3">&amp;&amp;</span> lhs,
basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span><span class="sy3">&amp;&amp;</span> rhs<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits, <span class="kw1">class</span> Allocator<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span>
operator<span class="sy2">+</span><span class="br0">(</span><span class="kw4">const</span> CharT<span class="sy2">*</span> lhs,
<span class="kw4">const</span> basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span><span class="sy3">&amp;</span> rhs<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits, <span class="kw1">class</span> Allocator<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span>
operator<span class="sy2">+</span><span class="br0">(</span><span class="kw4">const</span> CharT<span class="sy2">*</span> lhs,
basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span><span class="sy3">&amp;&amp;</span> rhs<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits, <span class="kw1">class</span> Allocator<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span>
operator<span class="sy2">+</span><span class="br0">(</span>CharT lhs,
<span class="kw4">const</span> basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span><span class="sy3">&amp;</span> rhs<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits, <span class="kw1">class</span> Allocator<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span>
operator<span class="sy2">+</span><span class="br0">(</span>CharT lhs,
basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span><span class="sy3">&amp;&amp;</span> rhs<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits, <span class="kw1">class</span> Allocator<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span>
operator<span class="sy2">+</span><span class="br0">(</span><span class="kw4">const</span> basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span><span class="sy3">&amp;</span> lhs,
<span class="kw4">const</span> CharT<span class="sy2">*</span> rhs<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits, <span class="kw1">class</span> Allocator<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span>
operator<span class="sy2">+</span><span class="br0">(</span>basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span><span class="sy3">&amp;&amp;</span> lhs,
<span class="kw4">const</span> CharT<span class="sy2">*</span> rhs<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits, <span class="kw1">class</span> Allocator<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span>
operator<span class="sy2">+</span><span class="br0">(</span><span class="kw4">const</span> basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span><span class="sy3">&amp;</span> lhs,
CharT rhs<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits, <span class="kw1">class</span> Allocator<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span>
operator<span class="sy2">+</span><span class="br0">(</span>basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span><span class="sy3">&amp;&amp;</span> lhs,
CharT rhs<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits, <span class="kw1">class</span> Allocator<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> <span class="kw4">bool</span>
operator<span class="sy1">==</span><span class="br0">(</span><span class="kw4">const</span> basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span><span class="sy3">&amp;</span> lhs,
<span class="kw4">const</span> basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span><span class="sy3">&amp;</span> rhs<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits, <span class="kw1">class</span> Allocator<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> <span class="kw4">bool</span> operator<span class="sy1">==</span><span class="br0">(</span><span class="kw4">const</span> basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span><span class="sy3">&amp;</span> lhs,
<span class="kw4">const</span> CharT<span class="sy2">*</span> rhs<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits, <span class="kw1">class</span> Allocator<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> <span class="coMULTI">/* &#35265;&#25551;&#36848; */</span>
operator<span class="sy1">&lt;=&gt;</span><span class="br0">(</span><span class="kw4">const</span> basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span><span class="sy3">&amp;</span> lhs,
<span class="kw4">const</span> basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span><span class="sy3">&amp;</span> rhs<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits, <span class="kw1">class</span> Allocator<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> <span class="coMULTI">/* &#35265;&#25551;&#36848; */</span>
operator<span class="sy1">&lt;=&gt;</span><span class="br0">(</span><span class="kw4">const</span> basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span><span class="sy3">&amp;</span> lhs,
<span class="kw4">const</span> CharT<span class="sy2">*</span> rhs<span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// &#20132;&#25442;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits, <span class="kw1">class</span> Allocator<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> <span class="kw4">void</span>
swap<span class="br0">(</span>basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span><span class="sy3">&amp;</span> lhs,
basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span><span class="sy3">&amp;</span> rhs<span class="br0">)</span>
<span class="kw1">noexcept</span><span class="br0">(</span><span class="kw1">noexcept</span><span class="br0">(</span>lhs.<span class="me1">swap</span><span class="br0">(</span>rhs<span class="br0">)</span><span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// &#25554;&#20837;&#22120;&#19982;&#25552;&#21462;&#22120;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits, <span class="kw1">class</span> Allocator<span class="sy1">&gt;</span>
basic_istream<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>basic_istream<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> is,
basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span><span class="sy3">&amp;</span> str<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits, <span class="kw1">class</span> Allocator<span class="sy1">&gt;</span>
basic_ostream<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>basic_ostream<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> os,
<span class="kw4">const</span> basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span><span class="sy3">&amp;</span> str<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits, <span class="kw1">class</span> Allocator<span class="sy1">&gt;</span>
basic_istream<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span>
getline<span class="br0">(</span>basic_istream<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> is,
basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span><span class="sy3">&amp;</span> str,
CharT delim<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits, <span class="kw1">class</span> Allocator<span class="sy1">&gt;</span>
basic_istream<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span>
getline<span class="br0">(</span>basic_istream<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;&amp;</span> is,
basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span><span class="sy3">&amp;</span> str,
CharT delim<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits, <span class="kw1">class</span> Allocator<span class="sy1">&gt;</span>
basic_istream<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span>
getline<span class="br0">(</span>basic_istream<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> is,
basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span><span class="sy3">&amp;</span> str<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits, <span class="kw1">class</span> Allocator<span class="sy1">&gt;</span>
basic_istream<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span>
getline<span class="br0">(</span>basic_istream<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;&amp;</span> is,
basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span><span class="sy3">&amp;</span> str<span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// &#25830;&#38500;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits, <span class="kw1">class</span> Allocator, <span class="kw1">class</span> U<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> <span class="kw1">typename</span> basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">size_type</span>
erase<span class="br0">(</span>basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span><span class="sy3">&amp;</span> c, <span class="kw4">const</span> U<span class="sy3">&amp;</span> value<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits, <span class="kw1">class</span> Allocator, <span class="kw1">class</span> Pred<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> <span class="kw1">typename</span> basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">size_type</span>
erase_if<span class="br0">(</span>basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span><span class="sy3">&amp;</span> c, Pred pred<span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// basic_string typedef &#21517;</span>
<span class="kw1">using</span> string <span class="sy1">=</span> basic_string<span class="sy1">&lt;</span><span class="kw4">char</span><span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="kw1">using</span> u8string <span class="sy1">=</span> basic_string<span class="sy1">&lt;</span>char8_t<span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="kw1">using</span> u16string <span class="sy1">=</span> basic_string<span class="sy1">&lt;</span><span class="kw4">char16_t</span><span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="kw1">using</span> u32string <span class="sy1">=</span> basic_string<span class="sy1">&lt;</span><span class="kw4">char32_t</span><span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="kw1">using</span> wstring <span class="sy1">=</span> basic_string<span class="sy1">&lt;</span><span class="kw4">wchar_t</span><span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="co1">// &#25968;&#20540;&#36716;&#25442;</span>
<span class="kw4">int</span> stoi<span class="br0">(</span><span class="kw4">const</span> string<span class="sy3">&amp;</span> str, size_t<span class="sy2">*</span> idx <span class="sy1">=</span> nullptr, <span class="kw4">int</span> base <span class="sy1">=</span> <span class="nu0">10</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">long</span> stol<span class="br0">(</span><span class="kw4">const</span> string<span class="sy3">&amp;</span> str, size_t<span class="sy2">*</span> idx <span class="sy1">=</span> nullptr, <span class="kw4">int</span> base <span class="sy1">=</span> <span class="nu0">10</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">unsigned</span> <span class="kw4">long</span> stoul<span class="br0">(</span><span class="kw4">const</span> string<span class="sy3">&amp;</span> str, size_t<span class="sy2">*</span> idx <span class="sy1">=</span> nullptr, <span class="kw4">int</span> base <span class="sy1">=</span> <span class="nu0">10</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">long</span> <span class="kw4">long</span> stoll<span class="br0">(</span><span class="kw4">const</span> string<span class="sy3">&amp;</span> str, size_t<span class="sy2">*</span> idx <span class="sy1">=</span> nullptr, <span class="kw4">int</span> base <span class="sy1">=</span> <span class="nu0">10</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">unsigned</span> <span class="kw4">long</span> <span class="kw4">long</span> stoull<span class="br0">(</span><span class="kw4">const</span> string<span class="sy3">&amp;</span> str, size_t<span class="sy2">*</span> idx <span class="sy1">=</span> nullptr, <span class="kw4">int</span> base <span class="sy1">=</span> <span class="nu0">10</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">float</span> stof<span class="br0">(</span><span class="kw4">const</span> string<span class="sy3">&amp;</span> str, size_t<span class="sy2">*</span> idx <span class="sy1">=</span> nullptr<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">double</span> stod<span class="br0">(</span><span class="kw4">const</span> string<span class="sy3">&amp;</span> str, size_t<span class="sy2">*</span> idx <span class="sy1">=</span> nullptr<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">long</span> <span class="kw4">double</span> stold<span class="br0">(</span><span class="kw4">const</span> string<span class="sy3">&amp;</span> str, size_t<span class="sy2">*</span> idx <span class="sy1">=</span> nullptr<span class="br0">)</span><span class="sy4">;</span>
string to_string<span class="br0">(</span><span class="kw4">int</span> val<span class="br0">)</span><span class="sy4">;</span>
string to_string<span class="br0">(</span><span class="kw4">unsigned</span> val<span class="br0">)</span><span class="sy4">;</span>
string to_string<span class="br0">(</span><span class="kw4">long</span> val<span class="br0">)</span><span class="sy4">;</span>
string to_string<span class="br0">(</span><span class="kw4">unsigned</span> <span class="kw4">long</span> val<span class="br0">)</span><span class="sy4">;</span>
string to_string<span class="br0">(</span><span class="kw4">long</span> <span class="kw4">long</span> val<span class="br0">)</span><span class="sy4">;</span>
string to_string<span class="br0">(</span><span class="kw4">unsigned</span> <span class="kw4">long</span> <span class="kw4">long</span> val<span class="br0">)</span><span class="sy4">;</span>
string to_string<span class="br0">(</span><span class="kw4">float</span> val<span class="br0">)</span><span class="sy4">;</span>
string to_string<span class="br0">(</span><span class="kw4">double</span> val<span class="br0">)</span><span class="sy4">;</span>
string to_string<span class="br0">(</span><span class="kw4">long</span> <span class="kw4">double</span> val<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">int</span> stoi<span class="br0">(</span><span class="kw4">const</span> wstring<span class="sy3">&amp;</span> str, size_t<span class="sy2">*</span> idx <span class="sy1">=</span> nullptr, <span class="kw4">int</span> base <span class="sy1">=</span> <span class="nu0">10</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">long</span> stol<span class="br0">(</span><span class="kw4">const</span> wstring<span class="sy3">&amp;</span> str, size_t<span class="sy2">*</span> idx <span class="sy1">=</span> nullptr, <span class="kw4">int</span> base <span class="sy1">=</span> <span class="nu0">10</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">unsigned</span> <span class="kw4">long</span> stoul<span class="br0">(</span><span class="kw4">const</span> wstring<span class="sy3">&amp;</span> str, size_t<span class="sy2">*</span> idx <span class="sy1">=</span> nullptr, <span class="kw4">int</span> base <span class="sy1">=</span> <span class="nu0">10</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">long</span> <span class="kw4">long</span> stoll<span class="br0">(</span><span class="kw4">const</span> wstring<span class="sy3">&amp;</span> str, size_t<span class="sy2">*</span> idx <span class="sy1">=</span> nullptr, <span class="kw4">int</span> base <span class="sy1">=</span> <span class="nu0">10</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">unsigned</span> <span class="kw4">long</span> <span class="kw4">long</span> stoull<span class="br0">(</span><span class="kw4">const</span> wstring<span class="sy3">&amp;</span> str, size_t<span class="sy2">*</span> idx <span class="sy1">=</span> nullptr, <span class="kw4">int</span> base <span class="sy1">=</span> <span class="nu0">10</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">float</span> stof<span class="br0">(</span><span class="kw4">const</span> wstring<span class="sy3">&amp;</span> str, size_t<span class="sy2">*</span> idx <span class="sy1">=</span> nullptr<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">double</span> stod<span class="br0">(</span><span class="kw4">const</span> wstring<span class="sy3">&amp;</span> str, size_t<span class="sy2">*</span> idx <span class="sy1">=</span> nullptr<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">long</span> <span class="kw4">double</span> stold<span class="br0">(</span><span class="kw4">const</span> wstring<span class="sy3">&amp;</span> str, size_t<span class="sy2">*</span> idx <span class="sy1">=</span> nullptr<span class="br0">)</span><span class="sy4">;</span>
wstring to_wstring<span class="br0">(</span><span class="kw4">int</span> val<span class="br0">)</span><span class="sy4">;</span>
wstring to_wstring<span class="br0">(</span><span class="kw4">unsigned</span> val<span class="br0">)</span><span class="sy4">;</span>
wstring to_wstring<span class="br0">(</span><span class="kw4">long</span> val<span class="br0">)</span><span class="sy4">;</span>
wstring to_wstring<span class="br0">(</span><span class="kw4">unsigned</span> <span class="kw4">long</span> val<span class="br0">)</span><span class="sy4">;</span>
wstring to_wstring<span class="br0">(</span><span class="kw4">long</span> <span class="kw4">long</span> val<span class="br0">)</span><span class="sy4">;</span>
wstring to_wstring<span class="br0">(</span><span class="kw4">unsigned</span> <span class="kw4">long</span> <span class="kw4">long</span> val<span class="br0">)</span><span class="sy4">;</span>
wstring to_wstring<span class="br0">(</span><span class="kw4">float</span> val<span class="br0">)</span><span class="sy4">;</span>
wstring to_wstring<span class="br0">(</span><span class="kw4">double</span> val<span class="br0">)</span><span class="sy4">;</span>
wstring to_wstring<span class="br0">(</span><span class="kw4">long</span> <span class="kw4">double</span> val<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">namespace</span> pmr <span class="br0">{</span>
<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> char_traits<span class="sy1">&lt;</span>CharT<span class="sy1">&gt;&gt;</span>
<span class="kw1">using</span> basic_string <span class="sy1">=</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, polymorphic_allocator<span class="sy1">&lt;</span>CharT<span class="sy1">&gt;&gt;</span><span class="sy4">;</span>
<span class="kw1">using</span> string <span class="sy1">=</span> basic_string<span class="sy1">&lt;</span><span class="kw4">char</span><span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="kw1">using</span> u8string <span class="sy1">=</span> basic_string<span class="sy1">&lt;</span>char8_t<span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="kw1">using</span> u16string <span class="sy1">=</span> basic_string<span class="sy1">&lt;</span><span class="kw4">char16_t</span><span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="kw1">using</span> u32string <span class="sy1">=</span> basic_string<span class="sy1">&lt;</span><span class="kw4">char32_t</span><span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="kw1">using</span> wstring <span class="sy1">=</span> basic_string<span class="sy1">&lt;</span><span class="kw4">wchar_t</span><span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="br0">}</span>
<span class="co1">// &#25955;&#21015;&#25903;&#25345;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> T<span class="sy1">&gt;</span> <span class="kw1">struct</span> hash<span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;&gt;</span> <span class="kw1">struct</span> hash<span class="sy1">&lt;</span>string<span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;&gt;</span> <span class="kw1">struct</span> hash<span class="sy1">&lt;</span>u8string<span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;&gt;</span> <span class="kw1">struct</span> hash<span class="sy1">&lt;</span>u16string<span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;&gt;</span> <span class="kw1">struct</span> hash<span class="sy1">&lt;</span>u32string<span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;&gt;</span> <span class="kw1">struct</span> hash<span class="sy1">&lt;</span>wstring<span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;&gt;</span> <span class="kw1">struct</span> hash<span class="sy1">&lt;</span>pmr<span class="sy4">::</span><span class="me2">string</span><span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;&gt;</span> <span class="kw1">struct</span> hash<span class="sy1">&lt;</span>pmr<span class="sy4">::</span><span class="me2">u8string</span><span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;&gt;</span> <span class="kw1">struct</span> hash<span class="sy1">&lt;</span>pmr<span class="sy4">::</span><span class="me2">u16string</span><span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;&gt;</span> <span class="kw1">struct</span> hash<span class="sy1">&lt;</span>pmr<span class="sy4">::</span><span class="me2">u32string</span><span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;&gt;</span> <span class="kw1">struct</span> hash<span class="sy1">&lt;</span>pmr<span class="sy4">::</span><span class="me2">wstring</span><span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="kw1">inline</span> <span class="kw1">namespace</span> literals <span class="br0">{</span>
<span class="kw1">inline</span> <span class="kw1">namespace</span> string_literals <span class="br0">{</span>
<span class="co1">// basic_string &#23383;&#38754;&#37327;&#21518;&#32512;</span>
<span class="kw4">constexpr</span> string operator<span class="st0">&quot;&quot;</span>s<span class="br0">(</span><span class="kw4">const</span> <span class="kw4">char</span><span class="sy2">*</span> str, size_t len<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> u8string operator<span class="st0">&quot;&quot;</span>s<span class="br0">(</span><span class="kw4">const</span> char8_t<span class="sy2">*</span> str, size_t len<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> u16string operator<span class="st0">&quot;&quot;</span>s<span class="br0">(</span><span class="kw4">const</span> <span class="kw4">char16_t</span><span class="sy2">*</span> str, size_t len<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> u32string operator<span class="st0">&quot;&quot;</span>s<span class="br0">(</span><span class="kw4">const</span> <span class="kw4">char32_t</span><span class="sy2">*</span> str, size_t len<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> wstring operator<span class="st0">&quot;&quot;</span>s<span class="br0">(</span><span class="kw4">const</span> <span class="kw4">wchar_t</span><span class="sy2">*</span> str, size_t len<span class="br0">)</span><span class="sy4">;</span>
<span class="br0">}</span>
<span class="br0">}</span>
<span class="br0">}</span></pre></div>
</div>
<h4><span class="mw-headline" id=".E7.B1.BB.E6.A8.A1.E6.9D.BF_std::char_traits">&#31867;&#27169;&#26495; <span class="t-lc"><a href="cpp-string-char_traits.html">std::char_traits</a></span></span></h4>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="cpp source-cpp">
<pre class="de1"><span class="kw1">namespace</span> std <span class="br0">{</span>
<span class="kw1">template</span><span class="sy1">&lt;&gt;</span> <span class="kw1">struct</span> char_traits<span class="sy1">&lt;</span><span class="kw4">char</span><span class="sy1">&gt;</span> <span class="br0">{</span>
<span class="kw1">using</span> char_type <span class="sy1">=</span> <span class="kw4">char</span><span class="sy4">;</span>
<span class="kw1">using</span> int_type <span class="sy1">=</span> <span class="kw4">int</span><span class="sy4">;</span>
<span class="kw1">using</span> off_type <span class="sy1">=</span> streamoff<span class="sy4">;</span>
<span class="kw1">using</span> pos_type <span class="sy1">=</span> streampos<span class="sy4">;</span>
<span class="kw1">using</span> state_type <span class="sy1">=</span> mbstate_t<span class="sy4">;</span>
<span class="kw1">using</span> comparison_category <span class="sy1">=</span> strong_ordering<span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> <span class="kw4">void</span> assign<span class="br0">(</span>char_type<span class="sy3">&amp;</span> c1, <span class="kw4">const</span> char_type<span class="sy3">&amp;</span> c2<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> <span class="kw4">bool</span> eq<span class="br0">(</span>char_type c1, char_type c2<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> <span class="kw4">bool</span> lt<span class="br0">(</span>char_type c1, char_type c2<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> <span class="kw4">int</span> compare<span class="br0">(</span><span class="kw4">const</span> char_type<span class="sy2">*</span> s1, <span class="kw4">const</span> char_type<span class="sy2">*</span> s2, size_t n<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> size_t length<span class="br0">(</span><span class="kw4">const</span> char_type<span class="sy2">*</span> s<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> <span class="kw4">const</span> char_type<span class="sy2">*</span> find<span class="br0">(</span><span class="kw4">const</span> char_type<span class="sy2">*</span> s, size_t n,
<span class="kw4">const</span> char_type<span class="sy3">&amp;</span> a<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> char_type<span class="sy2">*</span> move<span class="br0">(</span>char_type<span class="sy2">*</span> s1, <span class="kw4">const</span> char_type<span class="sy2">*</span> s2, size_t n<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> char_type<span class="sy2">*</span> copy<span class="br0">(</span>char_type<span class="sy2">*</span> s1, <span class="kw4">const</span> char_type<span class="sy2">*</span> s2, size_t n<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> char_type<span class="sy2">*</span> assign<span class="br0">(</span>char_type<span class="sy2">*</span> s, size_t n, char_type a<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> int_type not_eof<span class="br0">(</span>int_type c<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> char_type to_char_type<span class="br0">(</span>int_type c<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> int_type to_int_type<span class="br0">(</span>char_type c<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> <span class="kw4">bool</span> eq_int_type<span class="br0">(</span>int_type c1, int_type c2<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> int_type eof<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="br0">}</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;&gt;</span> <span class="kw1">struct</span> char_traits<span class="sy1">&lt;</span>char8_t<span class="sy1">&gt;</span> <span class="br0">{</span>
<span class="kw1">using</span> char_type <span class="sy1">=</span> char8_t<span class="sy4">;</span>
<span class="kw1">using</span> int_type <span class="sy1">=</span> <span class="kw4">unsigned</span> <span class="kw4">int</span><span class="sy4">;</span>
<span class="kw1">using</span> off_type <span class="sy1">=</span> streamoff<span class="sy4">;</span>
<span class="kw1">using</span> pos_type <span class="sy1">=</span> u8streampos<span class="sy4">;</span>
<span class="kw1">using</span> state_type <span class="sy1">=</span> mbstate_t<span class="sy4">;</span>
<span class="kw1">using</span> comparison_category <span class="sy1">=</span> strong_ordering<span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> <span class="kw4">void</span> assign<span class="br0">(</span>char_type<span class="sy3">&amp;</span> c1, <span class="kw4">const</span> char_type<span class="sy3">&amp;</span> c2<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> <span class="kw4">bool</span> eq<span class="br0">(</span>char_type c1, char_type c2<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> <span class="kw4">bool</span> lt<span class="br0">(</span>char_type c1, char_type c2<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> <span class="kw4">int</span> compare<span class="br0">(</span><span class="kw4">const</span> char_type<span class="sy2">*</span> s1, <span class="kw4">const</span> char_type<span class="sy2">*</span> s2, size_t n<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> size_t length<span class="br0">(</span><span class="kw4">const</span> char_type<span class="sy2">*</span> s<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> <span class="kw4">const</span> char_type<span class="sy2">*</span> find<span class="br0">(</span><span class="kw4">const</span> char_type<span class="sy2">*</span> s, size_t n,
<span class="kw4">const</span> char_type<span class="sy3">&amp;</span> a<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> char_type<span class="sy2">*</span> move<span class="br0">(</span>char_type<span class="sy2">*</span> s1, <span class="kw4">const</span> char_type<span class="sy2">*</span> s2, size_t n<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> char_type<span class="sy2">*</span> copy<span class="br0">(</span>char_type<span class="sy2">*</span> s1, <span class="kw4">const</span> char_type<span class="sy2">*</span> s2, size_t n<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> char_type<span class="sy2">*</span> assign<span class="br0">(</span>char_type<span class="sy2">*</span> s, size_t n, char_type a<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> int_type not_eof<span class="br0">(</span>int_type c<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> char_type to_char_type<span class="br0">(</span>int_type c<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> int_type to_int_type<span class="br0">(</span>char_type c<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> <span class="kw4">bool</span> eq_int_type<span class="br0">(</span>int_type c1, int_type c2<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> int_type eof<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="br0">}</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;&gt;</span> <span class="kw1">struct</span> char_traits<span class="sy1">&lt;</span><span class="kw4">char16_t</span><span class="sy1">&gt;</span> <span class="br0">{</span>
<span class="kw1">using</span> char_type <span class="sy1">=</span> <span class="kw4">char16_t</span><span class="sy4">;</span>
<span class="kw1">using</span> int_type <span class="sy1">=</span> uint_least16_t<span class="sy4">;</span>
<span class="kw1">using</span> off_type <span class="sy1">=</span> streamoff<span class="sy4">;</span>
<span class="kw1">using</span> pos_type <span class="sy1">=</span> u16streampos<span class="sy4">;</span>
<span class="kw1">using</span> state_type <span class="sy1">=</span> mbstate_t<span class="sy4">;</span>
<span class="kw1">using</span> comparison_category <span class="sy1">=</span> strong_ordering<span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> <span class="kw4">void</span> assign<span class="br0">(</span>char_type<span class="sy3">&amp;</span> c1, <span class="kw4">const</span> char_type<span class="sy3">&amp;</span> c2<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> <span class="kw4">bool</span> eq<span class="br0">(</span>char_type c1, char_type c2<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> <span class="kw4">bool</span> lt<span class="br0">(</span>char_type c1, char_type c2<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> <span class="kw4">int</span> compare<span class="br0">(</span><span class="kw4">const</span> char_type<span class="sy2">*</span> s1, <span class="kw4">const</span> char_type<span class="sy2">*</span> s2, size_t n<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> size_t length<span class="br0">(</span><span class="kw4">const</span> char_type<span class="sy2">*</span> s<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> <span class="kw4">const</span> char_type<span class="sy2">*</span> find<span class="br0">(</span><span class="kw4">const</span> char_type<span class="sy2">*</span> s, size_t n,
<span class="kw4">const</span> char_type<span class="sy3">&amp;</span> a<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> char_type<span class="sy2">*</span> move<span class="br0">(</span>char_type<span class="sy2">*</span> s1, <span class="kw4">const</span> char_type<span class="sy2">*</span> s2, size_t n<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> char_type<span class="sy2">*</span> copy<span class="br0">(</span>char_type<span class="sy2">*</span> s1, <span class="kw4">const</span> char_type<span class="sy2">*</span> s2, size_t n<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> char_type<span class="sy2">*</span> assign<span class="br0">(</span>char_type<span class="sy2">*</span> s, size_t n, char_type a<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> int_type not_eof<span class="br0">(</span>int_type c<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> char_type to_char_type<span class="br0">(</span>int_type c<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> int_type to_int_type<span class="br0">(</span>char_type c<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> <span class="kw4">bool</span> eq_int_type<span class="br0">(</span>int_type c1, int_type c2<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> int_type eof<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="br0">}</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;&gt;</span> <span class="kw1">struct</span> char_traits<span class="sy1">&lt;</span><span class="kw4">char32_t</span><span class="sy1">&gt;</span> <span class="br0">{</span>
<span class="kw1">using</span> char_type <span class="sy1">=</span> <span class="kw4">char32_t</span><span class="sy4">;</span>
<span class="kw1">using</span> int_type <span class="sy1">=</span> uint_least32_t<span class="sy4">;</span>
<span class="kw1">using</span> off_type <span class="sy1">=</span> streamoff<span class="sy4">;</span>
<span class="kw1">using</span> pos_type <span class="sy1">=</span> u32streampos<span class="sy4">;</span>
<span class="kw1">using</span> state_type <span class="sy1">=</span> mbstate_t<span class="sy4">;</span>
<span class="kw1">using</span> comparison_category <span class="sy1">=</span> strong_ordering<span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> <span class="kw4">void</span> assign<span class="br0">(</span>char_type<span class="sy3">&amp;</span> c1, <span class="kw4">const</span> char_type<span class="sy3">&amp;</span> c2<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> <span class="kw4">bool</span> eq<span class="br0">(</span>char_type c1, char_type c2<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> <span class="kw4">bool</span> lt<span class="br0">(</span>char_type c1, char_type c2<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> <span class="kw4">int</span> compare<span class="br0">(</span><span class="kw4">const</span> char_type<span class="sy2">*</span> s1, <span class="kw4">const</span> char_type<span class="sy2">*</span> s2, size_t n<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> size_t length<span class="br0">(</span><span class="kw4">const</span> char_type<span class="sy2">*</span> s<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> <span class="kw4">const</span> char_type<span class="sy2">*</span> find<span class="br0">(</span><span class="kw4">const</span> char_type<span class="sy2">*</span> s, size_t n,
<span class="kw4">const</span> char_type<span class="sy3">&amp;</span> a<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> char_type<span class="sy2">*</span> move<span class="br0">(</span>char_type<span class="sy2">*</span> s1, <span class="kw4">const</span> char_type<span class="sy2">*</span> s2, size_t n<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> char_type<span class="sy2">*</span> copy<span class="br0">(</span>char_type<span class="sy2">*</span> s1, <span class="kw4">const</span> char_type<span class="sy2">*</span> s2, size_t n<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> char_type<span class="sy2">*</span> assign<span class="br0">(</span>char_type<span class="sy2">*</span> s, size_t n, char_type a<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> int_type not_eof<span class="br0">(</span>int_type c<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> char_type to_char_type<span class="br0">(</span>int_type c<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> int_type to_int_type<span class="br0">(</span>char_type c<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> <span class="kw4">bool</span> eq_int_type<span class="br0">(</span>int_type c1, int_type c2<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> int_type eof<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="br0">}</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;&gt;</span> <span class="kw1">struct</span> char_traits<span class="sy1">&lt;</span><span class="kw4">wchar_t</span><span class="sy1">&gt;</span> <span class="br0">{</span>
<span class="kw1">using</span> char_type <span class="sy1">=</span> <span class="kw4">wchar_t</span><span class="sy4">;</span>
<span class="kw1">using</span> int_type <span class="sy1">=</span> wint_t<span class="sy4">;</span>
<span class="kw1">using</span> off_type <span class="sy1">=</span> streamoff<span class="sy4">;</span>
<span class="kw1">using</span> pos_type <span class="sy1">=</span> wstreampos<span class="sy4">;</span>
<span class="kw1">using</span> state_type <span class="sy1">=</span> mbstate_t<span class="sy4">;</span>
<span class="kw1">using</span> comparison_category <span class="sy1">=</span> strong_ordering<span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> <span class="kw4">void</span> assign<span class="br0">(</span>char_type<span class="sy3">&amp;</span> c1, <span class="kw4">const</span> char_type<span class="sy3">&amp;</span> c2<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> <span class="kw4">bool</span> eq<span class="br0">(</span>char_type c1, char_type c2<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> <span class="kw4">bool</span> lt<span class="br0">(</span>char_type c1, char_type c2<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> <span class="kw4">int</span> compare<span class="br0">(</span><span class="kw4">const</span> char_type<span class="sy2">*</span> s1, <span class="kw4">const</span> char_type<span class="sy2">*</span> s2, size_t n<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> size_t length<span class="br0">(</span><span class="kw4">const</span> char_type<span class="sy2">*</span> s<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> <span class="kw4">const</span> char_type<span class="sy2">*</span> find<span class="br0">(</span><span class="kw4">const</span> char_type<span class="sy2">*</span> s, size_t n,
<span class="kw4">const</span> char_type<span class="sy3">&amp;</span> a<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> char_type<span class="sy2">*</span> move<span class="br0">(</span>char_type<span class="sy2">*</span> s1, <span class="kw4">const</span> char_type<span class="sy2">*</span> s2, size_t n<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> char_type<span class="sy2">*</span> copy<span class="br0">(</span>char_type<span class="sy2">*</span> s1, <span class="kw4">const</span> char_type<span class="sy2">*</span> s2, size_t n<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> char_type<span class="sy2">*</span> assign<span class="br0">(</span>char_type<span class="sy2">*</span> s, size_t n, char_type a<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> int_type not_eof<span class="br0">(</span>int_type c<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> char_type to_char_type<span class="br0">(</span>int_type c<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> int_type to_int_type<span class="br0">(</span>char_type c<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> <span class="kw4">bool</span> eq_int_type<span class="br0">(</span>int_type c1, int_type c2<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> int_type eof<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="br0">}</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div>
</div>
<h4><span class="mw-headline" id=".E7.B1.BB.E6.A8.A1.E6.9D.BF_std::basic_string">&#31867;&#27169;&#26495; <span class="t-lc"><a href="cpp-string-basic_string.html">std::basic_string</a></span></span></h4>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="cpp source-cpp">
<pre class="de1"><span class="kw1">namespace</span> std <span class="br0">{</span>
<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> char_traits<span class="sy1">&lt;</span>CharT<span class="sy1">&gt;</span>,
<span class="kw1">class</span> Allocator <span class="sy1">=</span> allocator<span class="sy1">&lt;</span>CharT<span class="sy1">&gt;&gt;</span>
<span class="kw1">class</span> basic_string <span class="br0">{</span>
<span class="kw1">public</span><span class="sy4">:</span>
<span class="co1">// &#31867;&#22411;</span>
<span class="kw1">using</span> Traits_type <span class="sy1">=</span> Traits<span class="sy4">;</span>
<span class="kw1">using</span> value_type <span class="sy1">=</span> CharT<span class="sy4">;</span>
<span class="kw1">using</span> allocator_type <span class="sy1">=</span> Allocator<span class="sy4">;</span>
<span class="kw1">using</span> size_type <span class="sy1">=</span> <span class="kw1">typename</span> allocator_traits<span class="sy1">&lt;</span>Allocator<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">size_type</span><span class="sy4">;</span>
<span class="kw1">using</span> difference_type <span class="sy1">=</span> <span class="kw1">typename</span> allocator_traits<span class="sy1">&lt;</span>Allocator<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">difference_type</span><span class="sy4">;</span>
<span class="kw1">using</span> pointer <span class="sy1">=</span> <span class="kw1">typename</span> allocator_traits<span class="sy1">&lt;</span>Allocator<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">pointer</span><span class="sy4">;</span>
<span class="kw1">using</span> const_pointer <span class="sy1">=</span> <span class="kw1">typename</span> allocator_traits<span class="sy1">&lt;</span>Allocator<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">const_pointer</span><span class="sy4">;</span>
<span class="kw1">using</span> reference <span class="sy1">=</span> value_type<span class="sy3">&amp;</span><span class="sy4">;</span>
<span class="kw1">using</span> const_reference <span class="sy1">=</span> <span class="kw4">const</span> value_type<span class="sy3">&amp;</span><span class="sy4">;</span>
<span class="kw1">using</span> iterator <span class="sy1">=</span> <span class="coMULTI">/* &#30001;&#23454;&#29616;&#23450;&#20041; */</span><span class="sy4">;</span>
<span class="kw1">using</span> const_iterator <span class="sy1">=</span> <span class="coMULTI">/* &#30001;&#23454;&#29616;&#23450;&#20041; */</span><span class="sy4">;</span>
<span class="kw1">using</span> reverse_iterator <span class="sy1">=</span> <a href="cpp-iterator-reverse_iterator.html"><span class="kw658">std::<span class="me2">reverse_iterator</span></span></a><span class="sy1">&lt;</span>iterator<span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="kw1">using</span> const_reverse_iterator <span class="sy1">=</span> <a href="cpp-iterator-reverse_iterator.html"><span class="kw658">std::<span class="me2">reverse_iterator</span></span></a><span class="sy1">&lt;</span>const_iterator<span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">const</span> size_type npos <span class="sy1">=</span> <span class="sy2">-</span><span class="nu0">1</span><span class="sy4">;</span>
<span class="co1">// &#26500;&#36896;/&#22797;&#21046;/&#38144;&#27585;</span>
<span class="kw4">constexpr</span> basic_string<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="br0">(</span><span class="kw1">noexcept</span><span class="br0">(</span>Allocator<span class="br0">(</span><span class="br0">)</span><span class="br0">)</span><span class="br0">)</span>
<span class="sy4">:</span> basic_string<span class="br0">(</span>Allocator<span class="br0">(</span><span class="br0">)</span><span class="br0">)</span> <span class="br0">{</span> <span class="br0">}</span>
<span class="kw4">constexpr</span> <span class="kw1">explicit</span> basic_string<span class="br0">(</span><span class="kw4">const</span> Allocator<span class="sy3">&amp;</span> a<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="br0">(</span><span class="kw4">const</span> basic_string<span class="sy3">&amp;</span> str<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="br0">(</span>basic_string<span class="sy3">&amp;&amp;</span> str<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="br0">(</span><span class="kw4">const</span> basic_string<span class="sy3">&amp;</span> str, size_type pos,
<span class="kw4">const</span> Allocator<span class="sy3">&amp;</span> a <span class="sy1">=</span> Allocator<span class="br0">(</span><span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="br0">(</span><span class="kw4">const</span> basic_string<span class="sy3">&amp;</span> str, size_type pos, size_type n,
<span class="kw4">const</span> Allocator<span class="sy3">&amp;</span> a <span class="sy1">=</span> Allocator<span class="br0">(</span><span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> T<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> basic_string<span class="br0">(</span><span class="kw4">const</span> T<span class="sy3">&amp;</span> t, size_type pos, size_type n,
<span class="kw4">const</span> Allocator<span class="sy3">&amp;</span> a <span class="sy1">=</span> Allocator<span class="br0">(</span><span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> T<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> <span class="kw1">explicit</span> basic_string<span class="br0">(</span><span class="kw4">const</span> T<span class="sy3">&amp;</span> t, <span class="kw4">const</span> Allocator<span class="sy3">&amp;</span> a <span class="sy1">=</span> Allocator<span class="br0">(</span><span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="br0">(</span><span class="kw4">const</span> CharT<span class="sy2">*</span> s, size_type n, <span class="kw4">const</span> Allocator<span class="sy3">&amp;</span> a <span class="sy1">=</span> Allocator<span class="br0">(</span><span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="br0">(</span><span class="kw4">const</span> CharT<span class="sy2">*</span> s, <span class="kw4">const</span> Allocator<span class="sy3">&amp;</span> a <span class="sy1">=</span> Allocator<span class="br0">(</span><span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="br0">(</span>nullptr_t<span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="br0">(</span>size_type n, CharT c, <span class="kw4">const</span> Allocator<span class="sy3">&amp;</span> a <span class="sy1">=</span> Allocator<span class="br0">(</span><span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> InputIt<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> basic_string<span class="br0">(</span>InputIt begin, InputIt end,
<span class="kw4">const</span> Allocator<span class="sy3">&amp;</span> a <span class="sy1">=</span> Allocator<span class="br0">(</span><span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="br0">(</span>initializer_list<span class="sy1">&lt;</span>CharT<span class="sy1">&gt;</span>, <span class="kw4">const</span> Allocator<span class="sy3">&amp;</span> <span class="sy1">=</span> Allocator<span class="br0">(</span><span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="br0">(</span><span class="kw4">const</span> basic_string<span class="sy3">&amp;</span>, <span class="kw4">const</span> Allocator<span class="sy3">&amp;</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="br0">(</span>basic_string<span class="sy3">&amp;&amp;</span>, <span class="kw4">const</span> Allocator<span class="sy3">&amp;</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> ~basic_string<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> basic_string<span class="sy3">&amp;</span> str<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span>basic_string<span class="sy3">&amp;&amp;</span> str<span class="br0">)</span>
<span class="kw1">noexcept</span><span class="br0">(</span>allocator_traits<span class="sy1">&lt;</span>Allocator<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">propagate_on_container_move_assignment</span><span class="sy4">::</span><span class="me2">value</span> <span class="sy3">||</span>
allocator_traits<span class="sy1">&lt;</span>Allocator<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">is_always_equal</span><span class="sy4">::</span><span class="me2">value</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> T<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> T<span class="sy3">&amp;</span> t<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> CharT<span class="sy2">*</span> s<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span>nullptr_t<span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span>CharT c<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span>initializer_list<span class="sy1">&lt;</span>CharT<span class="sy1">&gt;</span><span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// &#36845;&#20195;&#22120;</span>
<span class="kw4">constexpr</span> iterator begin<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> const_iterator begin<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> iterator end<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> const_iterator end<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> reverse_iterator rbegin<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> const_reverse_iterator rbegin<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> reverse_iterator rend<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> const_reverse_iterator rend<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> const_iterator cbegin<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> const_iterator cend<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> const_reverse_iterator crbegin<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> const_reverse_iterator crend<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="co1">// &#23481;&#37327;</span>
<span class="kw4">constexpr</span> size_type size<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> size_type length<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> size_type max_size<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> <span class="kw4">void</span> resize<span class="br0">(</span>size_type n, CharT c<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> <span class="kw4">void</span> resize<span class="br0">(</span>size_type n<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> size_type capacity<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> <span class="kw4">void</span> reserve<span class="br0">(</span>size_type res_arg<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">void</span> reserve<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span> <span class="co1">// &#24323;&#29992;</span>
<span class="kw4">constexpr</span> <span class="kw4">void</span> shrink_to_fit<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> <span class="kw4">void</span> clear<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="br0">[</span><span class="br0">[</span>nodiscard<span class="br0">]</span><span class="br0">]</span> <span class="kw4">constexpr</span> <span class="kw4">bool</span> empty<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="co1">// &#20803;&#32032;&#35775;&#38382;</span>
<span class="kw4">constexpr</span> const_reference operator<span class="br0">[</span><span class="br0">]</span><span class="br0">(</span>size_type pos<span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> reference operator<span class="br0">[</span><span class="br0">]</span><span class="br0">(</span>size_type pos<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> const_reference at<span class="br0">(</span>size_type n<span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> reference at<span class="br0">(</span>size_type n<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> <span class="kw4">const</span> CharT<span class="sy3">&amp;</span> front<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> CharT<span class="sy3">&amp;</span> front<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> <span class="kw4">const</span> CharT<span class="sy3">&amp;</span> back<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> CharT<span class="sy3">&amp;</span> back<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// &#20462;&#25913;&#22120;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> operator<span class="sy2">+</span><span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> basic_string<span class="sy3">&amp;</span> str<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> T<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> operator<span class="sy2">+</span><span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> T<span class="sy3">&amp;</span> t<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> operator<span class="sy2">+</span><span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> CharT<span class="sy2">*</span> s<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> operator<span class="sy2">+</span><span class="sy1">=</span><span class="br0">(</span>CharT c<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> operator<span class="sy2">+</span><span class="sy1">=</span><span class="br0">(</span>initializer_list<span class="sy1">&lt;</span>CharT<span class="sy1">&gt;</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> append<span class="br0">(</span><span class="kw4">const</span> basic_string<span class="sy3">&amp;</span> str<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> append<span class="br0">(</span><span class="kw4">const</span> basic_string<span class="sy3">&amp;</span> str,
size_type pos, size_type n <span class="sy1">=</span> npos<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> T<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> append<span class="br0">(</span><span class="kw4">const</span> T<span class="sy3">&amp;</span> t<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> T<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> append<span class="br0">(</span><span class="kw4">const</span> T<span class="sy3">&amp;</span> t, size_type pos, size_type n <span class="sy1">=</span> npos<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> append<span class="br0">(</span><span class="kw4">const</span> CharT<span class="sy2">*</span> s, size_type n<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> append<span class="br0">(</span><span class="kw4">const</span> CharT<span class="sy2">*</span> s<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> append<span class="br0">(</span>size_type n, CharT c<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> InputIt<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> append<span class="br0">(</span>InputIt first, InputIt last<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> append<span class="br0">(</span>initializer_list<span class="sy1">&lt;</span>CharT<span class="sy1">&gt;</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> <span class="kw4">void</span> push_back<span class="br0">(</span>CharT c<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> assign<span class="br0">(</span><span class="kw4">const</span> basic_string<span class="sy3">&amp;</span> str<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> assign<span class="br0">(</span>basic_string<span class="sy3">&amp;&amp;</span> str<span class="br0">)</span>
<span class="kw1">noexcept</span><span class="br0">(</span>allocator_traits<span class="sy1">&lt;</span>Allocator<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">propagate_on_container_move_assignment</span><span class="sy4">::</span><span class="me2">value</span> <span class="sy3">||</span>
allocator_traits<span class="sy1">&lt;</span>Allocator<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">is_always_equal</span><span class="sy4">::</span><span class="me2">value</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> assign<span class="br0">(</span><span class="kw4">const</span> basic_string<span class="sy3">&amp;</span> str,
size_type pos, size_type n <span class="sy1">=</span> npos<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> T<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> assign<span class="br0">(</span><span class="kw4">const</span> T<span class="sy3">&amp;</span> t<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> T<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> assign<span class="br0">(</span><span class="kw4">const</span> T<span class="sy3">&amp;</span> t, size_type pos, size_type n <span class="sy1">=</span> npos<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> assign<span class="br0">(</span><span class="kw4">const</span> CharT<span class="sy2">*</span> s, size_type n<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> assign<span class="br0">(</span><span class="kw4">const</span> CharT<span class="sy2">*</span> s<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> assign<span class="br0">(</span>size_type n, CharT c<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> InputIt<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> assign<span class="br0">(</span>InputIt first, InputIt last<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> assign<span class="br0">(</span>initializer_list<span class="sy1">&lt;</span>CharT<span class="sy1">&gt;</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> insert<span class="br0">(</span>size_type pos, <span class="kw4">const</span> basic_string<span class="sy3">&amp;</span> str<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> insert<span class="br0">(</span>size_type pos1, <span class="kw4">const</span> basic_string<span class="sy3">&amp;</span> str,
size_type pos2, size_type n <span class="sy1">=</span> npos<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> T<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> insert<span class="br0">(</span>size_type pos, <span class="kw4">const</span> T<span class="sy3">&amp;</span> t<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> T<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> insert<span class="br0">(</span>size_type pos1, <span class="kw4">const</span> T<span class="sy3">&amp;</span> t,
size_type pos2, size_type n <span class="sy1">=</span> npos<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> insert<span class="br0">(</span>size_type pos, <span class="kw4">const</span> CharT<span class="sy2">*</span> s, size_type n<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> insert<span class="br0">(</span>size_type pos, <span class="kw4">const</span> CharT<span class="sy2">*</span> s<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> insert<span class="br0">(</span>size_type pos, size_type n, CharT c<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> iterator insert<span class="br0">(</span>const_iterator p, CharT c<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> iterator insert<span class="br0">(</span>const_iterator p, size_type n, CharT c<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> InputIt<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> iterator insert<span class="br0">(</span>const_iterator p,
InputIt first, InputIt last<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> iterator insert<span class="br0">(</span>const_iterator p, initializer_list<span class="sy1">&lt;</span>CharT<span class="sy1">&gt;</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> erase<span class="br0">(</span>size_type pos <span class="sy1">=</span> <span class="nu0">0</span>, size_type n <span class="sy1">=</span> npos<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> iterator erase<span class="br0">(</span>const_iterator p<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> iterator erase<span class="br0">(</span>const_iterator first, const_iterator last<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> <span class="kw4">void</span> pop_back<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> replace<span class="br0">(</span>size_type pos1, size_type n1, <span class="kw4">const</span> basic_string<span class="sy3">&amp;</span> str<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> replace<span class="br0">(</span>size_type pos1, size_type n1, <span class="kw4">const</span> basic_string<span class="sy3">&amp;</span> str,
size_type pos2, size_type n2 <span class="sy1">=</span> npos<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> T<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> replace<span class="br0">(</span>size_type pos1, size_type n1, <span class="kw4">const</span> T<span class="sy3">&amp;</span> t<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> T<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> replace<span class="br0">(</span>size_type pos1, size_type n1, <span class="kw4">const</span> T<span class="sy3">&amp;</span> t,
size_type pos2, size_type n2 <span class="sy1">=</span> npos<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> replace<span class="br0">(</span>size_type pos, size_type n1,
<span class="kw4">const</span> CharT<span class="sy2">*</span> s, size_type n2<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> replace<span class="br0">(</span>size_type pos, size_type n1, <span class="kw4">const</span> CharT<span class="sy2">*</span> s<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> replace<span class="br0">(</span>size_type pos, size_type n1, size_type n2, CharT c<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> replace<span class="br0">(</span>const_iterator i1, const_iterator i2,
<span class="kw4">const</span> basic_string<span class="sy3">&amp;</span> str<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> T<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> replace<span class="br0">(</span>const_iterator i1, const_iterator i2, <span class="kw4">const</span> T<span class="sy3">&amp;</span> t<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> replace<span class="br0">(</span>const_iterator i1, const_iterator i2, <span class="kw4">const</span> CharT<span class="sy2">*</span> s,
size_type n<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> replace<span class="br0">(</span>const_iterator i1, const_iterator i2, <span class="kw4">const</span> CharT<span class="sy2">*</span> s<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> replace<span class="br0">(</span>const_iterator i1, const_iterator i2,
size_type n, CharT c<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> InputIt<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> replace<span class="br0">(</span>const_iterator i1, const_iterator i2,
InputIt j1, InputIt j2<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string<span class="sy3">&amp;</span> replace<span class="br0">(</span>const_iterator, const_iterator,
initializer_list<span class="sy1">&lt;</span>CharT<span class="sy1">&gt;</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> size_type copy<span class="br0">(</span>CharT<span class="sy2">*</span> s, size_type n, size_type pos <span class="sy1">=</span> <span class="nu0">0</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> <span class="kw4">void</span> swap<span class="br0">(</span>basic_string<span class="sy3">&amp;</span> str<span class="br0">)</span>
<span class="kw1">noexcept</span><span class="br0">(</span>allocator_traits<span class="sy1">&lt;</span>Allocator<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">propagate_on_container_swap</span><span class="sy4">::</span><span class="me2">value</span> <span class="sy3">||</span>
allocator_traits<span class="sy1">&lt;</span>Allocator<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">is_always_equal</span><span class="sy4">::</span><span class="me2">value</span><span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// &#23383;&#31526;&#20018;&#25805;&#20316;</span>
<span class="kw4">constexpr</span> <span class="kw4">const</span> CharT<span class="sy2">*</span> c_str<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> <span class="kw4">const</span> CharT<span class="sy2">*</span> data<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> CharT<span class="sy2">*</span> data<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> operator basic_string_view<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> allocator_type get_allocator<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> T<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> size_type find<span class="br0">(</span><span class="kw4">const</span> T<span class="sy3">&amp;</span> t, size_type pos <span class="sy1">=</span> <span class="nu0">0</span><span class="br0">)</span> <span class="kw4">const</span>
<span class="kw1">noexcept</span><span class="br0">(</span><span class="coMULTI">/* &#35265;&#25551;&#36848; */</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> size_type find<span class="br0">(</span><span class="kw4">const</span> basic_string<span class="sy3">&amp;</span> str, size_type pos <span class="sy1">=</span> <span class="nu0">0</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> size_type find<span class="br0">(</span><span class="kw4">const</span> CharT<span class="sy2">*</span> s, size_type pos, size_type n<span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> size_type find<span class="br0">(</span><span class="kw4">const</span> CharT<span class="sy2">*</span> s, size_type pos <span class="sy1">=</span> <span class="nu0">0</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> size_type find<span class="br0">(</span>CharT c, size_type pos <span class="sy1">=</span> <span class="nu0">0</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> T<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> size_type rfind<span class="br0">(</span><span class="kw4">const</span> T<span class="sy3">&amp;</span> t, size_type pos <span class="sy1">=</span> npos<span class="br0">)</span> <span class="kw4">const</span>
<span class="kw1">noexcept</span><span class="br0">(</span><span class="coMULTI">/* &#35265;&#25551;&#36848; */</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> size_type rfind<span class="br0">(</span><span class="kw4">const</span> basic_string<span class="sy3">&amp;</span> str,
size_type pos <span class="sy1">=</span> npos<span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> size_type rfind<span class="br0">(</span><span class="kw4">const</span> CharT<span class="sy2">*</span> s, size_type pos, size_type n<span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> size_type rfind<span class="br0">(</span><span class="kw4">const</span> CharT<span class="sy2">*</span> s, size_type pos <span class="sy1">=</span> npos<span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> size_type rfind<span class="br0">(</span>CharT c, size_type pos <span class="sy1">=</span> npos<span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> T<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> size_type find_first_of<span class="br0">(</span><span class="kw4">const</span> T<span class="sy3">&amp;</span> t, size_type pos <span class="sy1">=</span> <span class="nu0">0</span><span class="br0">)</span> <span class="kw4">const</span>
<span class="kw1">noexcept</span><span class="br0">(</span><span class="coMULTI">/* &#35265;&#25551;&#36848; */</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> size_type find_first_of<span class="br0">(</span><span class="kw4">const</span> basic_string<span class="sy3">&amp;</span> str,
size_type pos <span class="sy1">=</span> <span class="nu0">0</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> size_type find_first_of<span class="br0">(</span><span class="kw4">const</span> CharT<span class="sy2">*</span> s, size_type pos, size_type n<span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> size_type find_first_of<span class="br0">(</span><span class="kw4">const</span> CharT<span class="sy2">*</span> s, size_type pos <span class="sy1">=</span> <span class="nu0">0</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> size_type find_first_of<span class="br0">(</span>CharT c, size_type pos <span class="sy1">=</span> <span class="nu0">0</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> T<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> size_type find_last_of<span class="br0">(</span><span class="kw4">const</span> T<span class="sy3">&amp;</span> t, size_type pos <span class="sy1">=</span> npos<span class="br0">)</span> <span class="kw4">const</span>
<span class="kw1">noexcept</span><span class="br0">(</span><span class="coMULTI">/* &#35265;&#25551;&#36848; */</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> size_type find_last_of<span class="br0">(</span><span class="kw4">const</span> basic_string<span class="sy3">&amp;</span> str,
size_type pos <span class="sy1">=</span> npos<span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> size_type find_last_of<span class="br0">(</span><span class="kw4">const</span> CharT<span class="sy2">*</span> s, size_type pos, size_type n<span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> size_type find_last_of<span class="br0">(</span><span class="kw4">const</span> CharT<span class="sy2">*</span> s, size_type pos <span class="sy1">=</span> npos<span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> size_type find_last_of<span class="br0">(</span>CharT c, size_type pos <span class="sy1">=</span> npos<span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> T<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> size_type find_first_not_of<span class="br0">(</span><span class="kw4">const</span> T<span class="sy3">&amp;</span> t, size_type pos <span class="sy1">=</span> <span class="nu0">0</span><span class="br0">)</span> <span class="kw4">const</span>
<span class="kw1">noexcept</span><span class="br0">(</span><span class="coMULTI">/* &#35265;&#25551;&#36848; */</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> size_type find_first_not_of<span class="br0">(</span><span class="kw4">const</span> basic_string<span class="sy3">&amp;</span> str,
size_type pos <span class="sy1">=</span> <span class="nu0">0</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> size_type find_first_not_of<span class="br0">(</span><span class="kw4">const</span> CharT<span class="sy2">*</span> s,
size_type pos, size_type n<span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> size_type find_first_not_of<span class="br0">(</span><span class="kw4">const</span> CharT<span class="sy2">*</span> s, size_type pos <span class="sy1">=</span> <span class="nu0">0</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> size_type find_first_not_of<span class="br0">(</span>CharT c, size_type pos <span class="sy1">=</span> <span class="nu0">0</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> T<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> size_type find_last_not_of<span class="br0">(</span><span class="kw4">const</span> T<span class="sy3">&amp;</span> t, size_type pos <span class="sy1">=</span> npos<span class="br0">)</span> <span class="kw4">const</span>
<span class="kw1">noexcept</span><span class="br0">(</span><span class="coMULTI">/* &#35265;&#25551;&#36848; */</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> size_type find_last_not_of<span class="br0">(</span><span class="kw4">const</span> basic_string<span class="sy3">&amp;</span> str,
size_type pos <span class="sy1">=</span> npos<span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> size_type find_last_not_of<span class="br0">(</span><span class="kw4">const</span> CharT<span class="sy2">*</span> s, size_type pos, size_type n<span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> size_type find_last_not_of<span class="br0">(</span><span class="kw4">const</span> CharT<span class="sy2">*</span> s, size_type pos <span class="sy1">=</span> npos<span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> size_type find_last_not_of<span class="br0">(</span>CharT c, size_type pos <span class="sy1">=</span> npos<span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> basic_string substr<span class="br0">(</span>size_type pos <span class="sy1">=</span> <span class="nu0">0</span>, size_type n <span class="sy1">=</span> npos<span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> T<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> <span class="kw4">int</span> compare<span class="br0">(</span><span class="kw4">const</span> T<span class="sy3">&amp;</span> t<span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="br0">(</span><span class="coMULTI">/* &#35265;&#25551;&#36848; */</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> T<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> <span class="kw4">int</span> compare<span class="br0">(</span>size_type pos1, size_type n1, <span class="kw4">const</span> T<span class="sy3">&amp;</span> t<span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> T<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> <span class="kw4">int</span> compare<span class="br0">(</span>size_type pos1, size_type n1, <span class="kw4">const</span> T<span class="sy3">&amp;</span> t,
size_type pos2, size_type n2 <span class="sy1">=</span> npos<span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> <span class="kw4">int</span> compare<span class="br0">(</span><span class="kw4">const</span> basic_string<span class="sy3">&amp;</span> str<span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> <span class="kw4">int</span> compare<span class="br0">(</span>size_type pos1, size_type n1, <span class="kw4">const</span> basic_string<span class="sy3">&amp;</span> str<span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> <span class="kw4">int</span> compare<span class="br0">(</span>size_type pos1, size_type n1, <span class="kw4">const</span> basic_string<span class="sy3">&amp;</span> str,
size_type pos2, size_type n2 <span class="sy1">=</span> npos<span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> <span class="kw4">int</span> compare<span class="br0">(</span><span class="kw4">const</span> CharT<span class="sy2">*</span> s<span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> <span class="kw4">int</span> compare<span class="br0">(</span>size_type pos1, size_type n1, <span class="kw4">const</span> CharT<span class="sy2">*</span> s<span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> <span class="kw4">int</span> compare<span class="br0">(</span>size_type pos1, size_type n1, <span class="kw4">const</span> CharT<span class="sy2">*</span> s, size_type n2<span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> <span class="kw4">bool</span> starts_with<span class="br0">(</span>basic_string_view<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span> x<span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> <span class="kw4">bool</span> starts_with<span class="br0">(</span>CharT x<span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> <span class="kw4">bool</span> starts_with<span class="br0">(</span><span class="kw4">const</span> CharT<span class="sy2">*</span> x<span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> <span class="kw4">bool</span> ends_with<span class="br0">(</span>basic_string_view<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span> x<span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> <span class="kw4">bool</span> ends_with<span class="br0">(</span>CharT x<span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> <span class="kw4">bool</span> ends_with<span class="br0">(</span><span class="kw4">const</span> CharT<span class="sy2">*</span> x<span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> <span class="kw4">bool</span> contains<span class="br0">(</span>basic_string_view<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span> x<span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> <span class="kw4">bool</span> contains<span class="br0">(</span>CharT x<span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> <span class="kw4">bool</span> contains<span class="br0">(</span><span class="kw4">const</span> CharT<span class="sy2">*</span> x<span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="br0">}</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> InputIt,
<span class="kw1">class</span> Allocator <span class="sy1">=</span> allocator<span class="sy1">&lt;</span><span class="kw1">typename</span> iterator_traits<span class="sy1">&lt;</span>InputIt<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">value_type</span><span class="sy1">&gt;&gt;</span>
basic_string<span class="br0">(</span>InputIt, InputIt, Allocator <span class="sy1">=</span> Allocator<span class="br0">(</span><span class="br0">)</span><span class="br0">)</span>
<span class="sy2">-</span><span class="sy1">&gt;</span> basic_string<span class="sy1">&lt;</span><span class="kw1">typename</span> iterator_traits<span class="sy1">&lt;</span>InputIt<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">value_type</span>,
char_traits<span class="sy1">&lt;</span><span class="kw1">typename</span> iterator_traits<span class="sy1">&lt;</span>InputIt<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">value_type</span><span class="sy1">&gt;</span>,
Allocator<span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT,
<span class="kw1">class</span> Traits,
<span class="kw1">class</span> Allocator <span class="sy1">=</span> allocator<span class="sy1">&lt;</span>CharT<span class="sy1">&gt;&gt;</span>
<span class="kw1">explicit</span> basic_string<span class="br0">(</span>basic_string_view<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span>, <span class="kw4">const</span> Allocator<span class="sy3">&amp;</span> <span class="sy1">=</span> Allocator<span class="br0">(</span><span class="br0">)</span><span class="br0">)</span>
<span class="sy2">-</span><span class="sy1">&gt;</span> basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT,
<span class="kw1">class</span> Traits,
<span class="kw1">class</span> Allocator <span class="sy1">=</span> allocator<span class="sy1">&lt;</span>CharT<span class="sy1">&gt;&gt;</span>
basic_string<span class="br0">(</span>basic_string_view<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span>,
<span class="kw1">typename</span> <span class="coMULTI">/* &#35265;&#25551;&#36848; */</span><span class="sy4">::</span><span class="me2">size_type</span>,
<span class="kw1">typename</span> <span class="coMULTI">/* &#35265;&#25551;&#36848; */</span><span class="sy4">::</span><span class="me2">size_type</span>,
<span class="kw4">const</span> Allocator<span class="sy3">&amp;</span> <span class="sy1">=</span> Allocator<span class="br0">(</span><span class="br0">)</span><span class="br0">)</span>
<span class="sy2">-</span><span class="sy1">&gt;</span> basic_string<span class="sy1">&lt;</span>CharT, Traits, Allocator<span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div>
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