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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">&#23454;&#39564;&#24615;&#24211;&#22836;&#25991;&#20214;</span> &lt;experimental/string_view&gt;</h1>
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<div id="contentSub"><span class="subpages">&lt; <a href="cpp.html">cpp</a>&lrm; | <a href="cpp-header.html">header</a>&lrm; | <a href="cpp-header-experimental.html">experimental</a></span></div>
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<p>&#27492;&#22836;&#25991;&#20214;&#26159;&#24211;&#22522;&#30784; TS (<a href="cpp-experimental-lib_extensions.html">v1</a>, <a href="cpp-experimental-lib_extensions_2.html">v2</a>) &#30340;&#19968;&#37096;&#20998;&#12290;</p>
<h3><span class="mw-headline" id=".E7.B1.BB">&#31867;</span></h3>
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<td><span class="t-lc"><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/basic_string_view&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/basic string view&#65288;&#39029;&#38754;&#19981;&#23384;&#22312;&#65289;">std::experimental::basic_string_view</a></span> <span class="t-mark-rev t-since-libfund-ts t-mark-ts">(&#24211;&#22522;&#30784; TS)</span></td>
<td>&#34920;&#31034;&#21040;&#26576;&#20010;&#23383;&#31526;&#20018;&#30340;&#24341;&#29992;&#30340;&#31867;&#27169;&#26495; <span class="t-mark">(&#31867;&#27169;&#26495;)</span></td>
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<td><span class="t-lc"><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/basic_string_view&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/basic string view&#65288;&#39029;&#38754;&#19981;&#23384;&#22312;&#65289;">std::experimental::string_view</a></span> <span class="t-mark-rev t-since-libfund-ts t-mark-ts">(&#24211;&#22522;&#30784; TS)</span></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="http://zh.cppreference.com/w/cpp/experimental/basic_string_view"><span class="kw2326">std::<span class="me2">experimental</span><span class="sy4">::</span><span class="me2">basic_string_view</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>
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<td><span class="t-lc"><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/basic_string_view&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/basic string view&#65288;&#39029;&#38754;&#19981;&#23384;&#22312;&#65289;">std::experimental::wstring_view</a></span> <span class="t-mark-rev t-since-libfund-ts t-mark-ts">(&#24211;&#22522;&#30784; TS)</span></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="http://zh.cppreference.com/w/cpp/experimental/basic_string_view"><span class="kw2326">std::<span class="me2">experimental</span><span class="sy4">::</span><span class="me2">basic_string_view</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>
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<td><span class="t-lc"><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/basic_string_view&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/basic string view&#65288;&#39029;&#38754;&#19981;&#23384;&#22312;&#65289;">std::experimental::u16string_view</a></span> <span class="t-mark-rev t-since-libfund-ts t-mark-ts">(&#24211;&#22522;&#30784; TS)</span></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="http://zh.cppreference.com/w/cpp/experimental/basic_string_view"><span class="kw2326">std::<span class="me2">experimental</span><span class="sy4">::</span><span class="me2">basic_string_view</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>
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<td><span class="t-lc"><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/basic_string_view&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/basic string view&#65288;&#39029;&#38754;&#19981;&#23384;&#22312;&#65289;">std::experimental::u32string_view</a></span> <span class="t-mark-rev t-since-libfund-ts t-mark-ts">(&#24211;&#22522;&#30784; TS)</span></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="http://zh.cppreference.com/w/cpp/experimental/basic_string_view"><span class="kw2326">std::<span class="me2">experimental</span><span class="sy4">::</span><span class="me2">basic_string_view</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>
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<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="http://zh.cppreference.com/w/cpp/experimental/basic_string_view"><span class="kw2328">std::<span class="me2">experimental</span><span class="sy4">::</span><span class="me2">string_view</span></span></a><span class="sy1">&gt;</span></span></span> <span class="t-mark-rev t-since-libfund-ts t-mark-ts">(&#24211;&#22522;&#30784; TS)</span></td>
<td><span class="t-mark">(&#31867;&#27169;&#26495;&#29305;&#21270;)</span></td>
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<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="http://zh.cppreference.com/w/cpp/experimental/basic_string_view"><span class="kw2332">std::<span class="me2">experimental</span><span class="sy4">::</span><span class="me2">u16string_view</span></span></a><span class="sy1">&gt;</span></span></span> <span class="t-mark-rev t-since-libfund-ts t-mark-ts">(&#24211;&#22522;&#30784; TS)</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="http://zh.cppreference.com/w/cpp/experimental/basic_string_view"><span class="kw2334">std::<span class="me2">experimental</span><span class="sy4">::</span><span class="me2">u32string_view</span></span></a><span class="sy1">&gt;</span></span></span> <span class="t-mark-rev t-since-libfund-ts t-mark-ts">(&#24211;&#22522;&#30784; TS)</span></td>
<td><span class="t-mark">(&#31867;&#27169;&#26495;&#29305;&#21270;)</span></td>
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<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="http://zh.cppreference.com/w/cpp/experimental/basic_string_view"><span class="kw2330">std::<span class="me2">experimental</span><span class="sy4">::</span><span class="me2">wstring_view</span></span></a><span class="sy1">&gt;</span></span></span> <span class="t-mark-rev t-since-libfund-ts t-mark-ts">(&#24211;&#22522;&#30784; TS)</span></td>
<td><span class="t-mark">(&#31867;&#27169;&#26495;&#29305;&#21270;)</span></td>
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<h3><span class="mw-headline" id=".E5.87.BD.E6.95.B0">&#20989;&#25968;</span></h3>
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<div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/basic_string_view/operator_cmp&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/basic string view/operator cmp&#65288;&#39029;&#38754;&#19981;&#23384;&#22312;&#65289;"><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></a></div>
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<td>&#20197;&#23383;&#20856;&#24207;&#27604;&#36739;&#20004;&#20010;&#35270;&#22270;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
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<div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/basic_string_view/operator_ltlt&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/basic string view/operator ltlt&#65288;&#39029;&#38754;&#19981;&#23384;&#22312;&#65289;"><span class="t-lines"><span>operator&lt;&lt;</span></span></a></div>
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<td>&#36827;&#34892;&#35270;&#22270;&#30340;&#27969;&#36755;&#20986;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
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<h3><span class="mw-headline" id=".E6.A6.82.E8.A6.81">&#27010;&#35201;</span></h3>
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<pre class="de1"><span class="kw1">namespace</span> std <span class="br0">{</span>
<span class="kw1">namespace</span> experimental <span class="br0">{</span>
<span class="kw1">inline</span> <span class="kw1">namespace</span> fundamentals_v1 <span class="br0">{</span>
<span class="co1">// 7.2&#65292;&#31867;&#27169;&#26495; basic_string_view</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">class</span> basic_string_view<span class="sy4">;</span>
<span class="co1">// 7.9&#65292;basic_string_view &#30340;&#38750;&#25104;&#21592;&#27604;&#36739;&#20989;&#25968;</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">&gt;</span>
<span class="kw4">constexpr</span> <span class="kw4">bool</span> operator<span class="sy1">==</span><span class="br0">(</span>basic_string_view<span class="sy1">&lt;</span>charT, traits<span class="sy1">&gt;</span> x,
basic_string_view<span class="sy1">&lt;</span>charT, traits<span class="sy1">&gt;</span> y<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="sy1">&gt;</span>
<span class="kw4">constexpr</span> <span class="kw4">bool</span> operator<span class="sy3">!</span><span class="sy1">=</span><span class="br0">(</span>basic_string_view<span class="sy1">&lt;</span>charT, traits<span class="sy1">&gt;</span> x,
basic_string_view<span class="sy1">&lt;</span>charT, traits<span class="sy1">&gt;</span> y<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="sy1">&gt;</span>
<span class="kw4">constexpr</span> <span class="kw4">bool</span> operator<span class="sy1">&lt;</span> <span class="br0">(</span>basic_string_view<span class="sy1">&lt;</span>charT, traits<span class="sy1">&gt;</span> x,
basic_string_view<span class="sy1">&lt;</span>charT, traits<span class="sy1">&gt;</span> y<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="sy1">&gt;</span>
<span class="kw4">constexpr</span> <span class="kw4">bool</span> operator<span class="sy1">&gt;</span> <span class="br0">(</span>basic_string_view<span class="sy1">&lt;</span>charT, traits<span class="sy1">&gt;</span> x,
basic_string_view<span class="sy1">&lt;</span>charT, traits<span class="sy1">&gt;</span> y<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="sy1">&gt;</span>
<span class="kw4">constexpr</span> <span class="kw4">bool</span> operator<span class="sy1">&lt;=</span><span class="br0">(</span>basic_string_view<span class="sy1">&lt;</span>charT, traits<span class="sy1">&gt;</span> x,
basic_string_view<span class="sy1">&lt;</span>charT, traits<span class="sy1">&gt;</span> y<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="sy1">&gt;</span>
<span class="kw4">constexpr</span> <span class="kw4">bool</span> operator<span class="sy1">&gt;=</span><span class="br0">(</span>basic_string_view<span class="sy1">&lt;</span>charT, traits<span class="sy1">&gt;</span> x,
basic_string_view<span class="sy1">&lt;</span>charT, traits<span class="sy1">&gt;</span> y<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="co1">// &#35265;&#19979;&#25991;&#65292;&#20805;&#36275;&#30340;&#27604;&#36739;&#20989;&#25968;&#30340;&#39069;&#22806;&#37325;&#36733; </span>
<span class="co1">// 7.10&#65292;&#25554;&#20837;&#31526;&#19982;&#25552;&#21462;&#31526;</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">&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,
basic_string_view<span class="sy1">&lt;</span>charT, traits<span class="sy1">&gt;</span> str<span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// basic_string_view typedef &#21517;</span>
<span class="kw1">typedef</span> basic_string_view<span class="sy1">&lt;</span><span class="kw4">char</span><span class="sy1">&gt;</span> string_view<span class="sy4">;</span>
<span class="kw1">typedef</span> basic_string_view<span class="sy1">&lt;</span><span class="kw4">char16_t</span><span class="sy1">&gt;</span> u16string_view<span class="sy4">;</span>
<span class="kw1">typedef</span> basic_string_view<span class="sy1">&lt;</span><span class="kw4">char32_t</span><span class="sy1">&gt;</span> u32string_view<span class="sy4">;</span>
<span class="kw1">typedef</span> basic_string_view<span class="sy1">&lt;</span><span class="kw4">wchar_t</span><span class="sy1">&gt;</span> wstring_view<span class="sy4">;</span>
<span class="br0">}</span> <span class="co1">// namespace fundamentals_v1</span>
<span class="br0">}</span> <span class="co1">// namespace experimental</span>
<span class="co1">// 7.11&#65292;&#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>experimental<span class="sy4">::</span><span class="me2">string_view</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>experimental<span class="sy4">::</span><span class="me2">u16string_view</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>experimental<span class="sy4">::</span><span class="me2">u32string_view</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>experimental<span class="sy4">::</span><span class="me2">wstring_view</span><span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="br0">}</span> <span class="co1">// namespace std</span></pre></div>
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