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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;spanstream&gt;</h1>
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<p>&#27492;&#22836;&#25991;&#20214;&#26159;<a href="cpp-io.html">&#36755;&#20837;/&#36755;&#20986;</a>&#24211;&#30340;&#19968;&#37096;&#20998;&#12290;</p>
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<h3><span class="mw-headline" id=".E7.B1.BB">&#31867;</span></h3>
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<td>
<div class="t-dsc-member-div">
<div><a href="cpp-io-basic_spanbuf.html"><span class="t-lines"><span>basic_spanbuf</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx23">(C++23)</span></span></span></div>
</div>
</td>
<td>&#23454;&#29616;&#21407;&#22987;&#22266;&#23450;&#23383;&#31526;&#32531;&#20914;&#21306;&#35774;&#22791;<br />
<span class="t-mark">(&#31867;&#27169;&#26495;)</span></td>
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<td>
<div class="t-dsc-member-div">
<div><a href="cpp-io-basic_ispanstream.html"><span class="t-lines"><span>basic_ispanstream</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx23">(C++23)</span></span></span></div>
</div>
</td>
<td>&#23454;&#29616;&#22266;&#23450;&#23383;&#31526;&#32531;&#20914;&#21306;&#36755;&#20837;&#25805;&#20316;<br />
<span class="t-mark">(&#31867;&#27169;&#26495;)</span></td>
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<div><a href="cpp-io-basic_ospanstream.html"><span class="t-lines"><span>basic_ospanstream</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx23">(C++23)</span></span></span></div>
</div>
</td>
<td>&#23454;&#29616;&#22266;&#23450;&#23383;&#31526;&#32531;&#20914;&#21306;&#36755;&#20986;&#25805;&#20316;<br />
<span class="t-mark">(&#31867;&#27169;&#26495;)</span></td>
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<div><a href="cpp-io-basic_spanstream.html"><span class="t-lines"><span>basic_spanstream</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx23">(C++23)</span></span></span></div>
</div>
</td>
<td>&#23454;&#29616;&#22266;&#23450;&#23383;&#31526;&#32531;&#20914;&#21306;&#36755;&#20837;/&#36755;&#20986;&#25805;&#20316;<br />
<span class="t-mark">(&#31867;&#27169;&#26495;)</span></td>
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<tr class="t-dsc">
<td><code>spanbuf</code><span class="t-mark-rev t-since-cxx23">(C++23)</span></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">std<span class="sy4">::</span><span class="me2">basic_spanbuf</span><span class="sy1">&lt;</span><span class="kw4">char</span><span class="sy1">&gt;</span></span></span><br />
<span class="t-mark">(typedef)</span></td>
</tr>
<tr class="t-dsc">
<td><code>wspanbuf</code><span class="t-mark-rev t-since-cxx23">(C++23)</span></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">std<span class="sy4">::</span><span class="me2">basic_spanbuf</span><span class="sy1">&lt;</span><span class="kw4">wchar_t</span><span class="sy1">&gt;</span></span></span><br />
<span class="t-mark">(typedef)</span></td>
</tr>
<tr class="t-dsc">
<td><code>ispanstream</code><span class="t-mark-rev t-since-cxx23">(C++23)</span></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">std<span class="sy4">::</span><span class="me2">basic_ispanstream</span><span class="sy1">&lt;</span><span class="kw4">char</span><span class="sy1">&gt;</span></span></span><br />
<span class="t-mark">(typedef)</span></td>
</tr>
<tr class="t-dsc">
<td><code>wispanstream</code><span class="t-mark-rev t-since-cxx23">(C++23)</span></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">std<span class="sy4">::</span><span class="me2">basic_ispanstream</span><span class="sy1">&lt;</span><span class="kw4">wchar_t</span><span class="sy1">&gt;</span></span></span><br />
<span class="t-mark">(typedef)</span></td>
</tr>
<tr class="t-dsc">
<td><code>ospanstream</code><span class="t-mark-rev t-since-cxx23">(C++23)</span></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">std<span class="sy4">::</span><span class="me2">basic_ospanstream</span><span class="sy1">&lt;</span><span class="kw4">char</span><span class="sy1">&gt;</span></span></span><br />
<span class="t-mark">(typedef)</span></td>
</tr>
<tr class="t-dsc">
<td><code>wospanstream</code><span class="t-mark-rev t-since-cxx23">(C++23)</span></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">std<span class="sy4">::</span><span class="me2">basic_ospanstream</span><span class="sy1">&lt;</span><span class="kw4">wchar_t</span><span class="sy1">&gt;</span></span></span><br />
<span class="t-mark">(typedef)</span></td>
</tr>
<tr class="t-dsc">
<td><code>spanstream</code><span class="t-mark-rev t-since-cxx23">(C++23)</span></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">std<span class="sy4">::</span><span class="me2">basic_spanstream</span><span class="sy1">&lt;</span><span class="kw4">char</span><span class="sy1">&gt;</span></span></span><br />
<span class="t-mark">(typedef)</span></td>
</tr>
<tr class="t-dsc">
<td><code>wspanstream</code><span class="t-mark-rev t-since-cxx23">(C++23)</span></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">std<span class="sy4">::</span><span class="me2">basic_spanstream</span><span class="sy1">&lt;</span><span class="kw4">wchar_t</span><span class="sy1">&gt;</span></span></span><br />
<span class="t-mark">(typedef)</span></td>
</tr>
<tr>
<td colspan="2">
<h3><span class="mw-headline" id=".E5.87.BD.E6.95.B0">&#20989;&#25968;</span></h3>
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<td>
<div class="t-dsc-member-div">
<div><a href="cpp-io-basic_spanbuf-swap2.html"><span class="t-lines"><span>std::swap<span class="t-dsc-small">(std::basic_spanbuf)</span></span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx23">(C++23)</span></span></span></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 class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-io-basic_ispanstream-swap2.html"><span class="t-lines"><span>std::swap<span class="t-dsc-small">(std::basic_ispanstream)</span></span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx23">(C++23)</span></span></span></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 class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-io-basic_ospanstream-swap2.html"><span class="t-lines"><span>std::swap<span class="t-dsc-small">(std::basic_ospanstream)</span></span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx23">(C++23)</span></span></span></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 class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-io-basic_spanstream-swap2.html"><span class="t-lines"><span>std::swap<span class="t-dsc-small">(std::basic_spanstream)</span></span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx23">(C++23)</span></span></span></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>
</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="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;&gt;</span>
<span class="kw1">class</span> basic_spanbuf<span class="sy4">;</span>
<span class="kw1">using</span> spanbuf <span class="sy1">=</span> basic_spanbuf<span class="sy1">&lt;</span><span class="kw4">char</span><span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="kw1">using</span> wspanbuf <span class="sy1">=</span> basic_spanbuf<span class="sy1">&lt;</span><span class="kw4">wchar_t</span><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="sy1">=</span> char_traits<span class="sy1">&lt;</span>CharT<span class="sy1">&gt;&gt;</span>
<span class="kw1">class</span> basic_ispanstream<span class="sy4">;</span>
<span class="kw1">using</span> ispanstream <span class="sy1">=</span> basic_ispanstream<span class="sy1">&lt;</span><span class="kw4">char</span><span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="kw1">using</span> wispanstream <span class="sy1">=</span> basic_ispanstream<span class="sy1">&lt;</span><span class="kw4">wchar_t</span><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="sy1">=</span> char_traits<span class="sy1">&lt;</span>CharT<span class="sy1">&gt;&gt;</span>
<span class="kw1">class</span> basic_ospanstream<span class="sy4">;</span>
<span class="kw1">using</span> ospanstream <span class="sy1">=</span> basic_ospanstream<span class="sy1">&lt;</span><span class="kw4">char</span><span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="kw1">using</span> wospanstream <span class="sy1">=</span> basic_ospanstream<span class="sy1">&lt;</span><span class="kw4">wchar_t</span><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="sy1">=</span> char_traits<span class="sy1">&lt;</span>CharT<span class="sy1">&gt;&gt;</span>
<span class="kw1">class</span> basic_spanstream<span class="sy4">;</span>
<span class="kw1">using</span> spanstream <span class="sy1">=</span> basic_spanstream<span class="sy1">&lt;</span><span class="kw4">char</span><span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="kw1">using</span> wspanstream <span class="sy1">=</span> basic_spanstream<span class="sy1">&lt;</span><span class="kw4">wchar_t</span><span class="sy1">&gt;</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_spanbuf">&#31867;&#27169;&#26495; <span class="t-lc">std::basic_spanbuf</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;&gt;</span>
<span class="kw1">class</span> basic_spanbuf
<span class="sy4">:</span> <span class="kw1">public</span> basic_streambuf<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span> <span class="br0">{</span>
<span class="kw1">public</span><span class="sy4">:</span>
<span class="kw1">using</span> char_type <span class="sy1">=</span> CharT<span class="sy4">;</span>
<span class="kw1">using</span> int_type <span class="sy1">=</span> <span class="kw1">typename</span> Traits<span class="sy4">::</span><span class="me2">int_type</span><span class="sy4">;</span>
<span class="kw1">using</span> pos_type <span class="sy1">=</span> <span class="kw1">typename</span> Traits<span class="sy4">::</span><span class="me2">pos_type</span><span class="sy4">;</span>
<span class="kw1">using</span> off_type <span class="sy1">=</span> <span class="kw1">typename</span> Traits<span class="sy4">::</span><span class="me2">off_type</span><span class="sy4">;</span>
<span class="kw1">using</span> traits_type <span class="sy1">=</span> Traits<span class="sy4">;</span>
<span class="co1">// &#26500;&#36896;&#20989;&#25968;</span>
basic_spanbuf<span class="br0">(</span><span class="br0">)</span> <span class="sy4">:</span> basic_spanbuf<span class="br0">(</span>ios_base<span class="sy4">::</span><span class="me2">in</span> <span class="sy3">|</span> ios_base<span class="sy4">::</span><span class="me2">out</span><span class="br0">)</span> <span class="br0">{</span><span class="br0">}</span>
<span class="kw1">explicit</span> basic_spanbuf<span class="br0">(</span>ios_base<span class="sy4">::</span><span class="me2">openmode</span> which<span class="br0">)</span>
<span class="sy4">:</span> basic_spanbuf<span class="br0">(</span>std<span class="sy4">::</span><span class="me2">span</span><span class="sy1">&lt;</span>CharT<span class="sy1">&gt;</span><span class="br0">(</span><span class="br0">)</span>, which<span class="br0">)</span> <span class="br0">{</span><span class="br0">}</span>
<span class="kw1">explicit</span> basic_spanbuf<span class="br0">(</span>
std<span class="sy4">::</span><span class="me2">span</span><span class="sy1">&lt;</span>CharT<span class="sy1">&gt;</span> s,
ios_base<span class="sy4">::</span><span class="me2">openmode</span> which <span class="sy1">=</span> ios_base<span class="sy4">::</span><span class="me2">in</span> <span class="sy3">|</span> ios_base<span class="sy4">::</span><span class="me2">out</span><span class="br0">)</span><span class="sy4">;</span>
basic_spanbuf<span class="br0">(</span><span class="kw4">const</span> basic_spanbuf<span class="sy3">&amp;</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
basic_spanbuf<span class="br0">(</span>basic_spanbuf<span class="sy3">&amp;&amp;</span> rhs<span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// &#36171;&#20540;&#19982;&#20132;&#25442;</span>
basic_spanbuf<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> basic_spanbuf<span class="sy3">&amp;</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
basic_spanbuf<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span>basic_spanbuf<span class="sy3">&amp;&amp;</span> rhs<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">void</span> swap<span class="br0">(</span>basic_spanbuf<span class="sy3">&amp;</span> rhs<span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// &#33719;&#21462;&#19982;&#35774;&#32622;</span>
std<span class="sy4">::</span><span class="me2">span</span><span class="sy1">&lt;</span>CharT<span class="sy1">&gt;</span> 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">void</span> span<span class="br0">(</span>std<span class="sy4">::</span><span class="me2">span</span><span class="sy1">&lt;</span>CharT<span class="sy1">&gt;</span> s<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw1">protected</span><span class="sy4">:</span>
<span class="co1">// &#37325;&#20889;&#30340;&#34394;&#20989;&#25968;</span>
basic_streambuf<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy2">*</span> setbuf<span class="br0">(</span>CharT<span class="sy2">*</span>, streamsize<span class="br0">)</span> override<span class="sy4">;</span>
pos_type seekoff<span class="br0">(</span>off_type off, ios_base<span class="sy4">::</span><span class="me2">seekdir</span> way,
ios_base<span class="sy4">::</span><span class="me2">openmode</span> which
<span class="sy1">=</span> ios_base<span class="sy4">::</span><span class="me2">in</span> <span class="sy3">|</span> ios_base<span class="sy4">::</span><span class="me2">out</span><span class="br0">)</span> override<span class="sy4">;</span>
pos_type seekpos<span class="br0">(</span>pos_type sp,
ios_base<span class="sy4">::</span><span class="me2">openmode</span> which
<span class="sy1">=</span> ios_base<span class="sy4">::</span><span class="me2">in</span> <span class="sy3">|</span> ios_base<span class="sy4">::</span><span class="me2">out</span><span class="br0">)</span> override<span class="sy4">;</span>
<span class="kw1">private</span><span class="sy4">:</span>
ios_base<span class="sy4">::</span><span class="me2">openmode</span> mode<span class="sy4">;</span> <span class="co1">// &#20165;&#29992;&#20110;&#38416;&#37322;</span>
std<span class="sy4">::</span><span class="me2">span</span><span class="sy1">&lt;</span>CharT<span class="sy1">&gt;</span> buf<span class="sy4">;</span> <span class="co1">// &#20165;&#29992;&#20110;&#38416;&#37322;</span>
<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="sy1">&gt;</span>
<span class="kw4">void</span> swap<span class="br0">(</span>basic_spanbuf<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> x,
basic_spanbuf<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> y<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_ispanstream">&#31867;&#27169;&#26495; <span class="t-lc">std::basic_ispanstream</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;&gt;</span>
<span class="kw1">class</span> basic_ispanstream
<span class="sy4">:</span> <span class="kw1">public</span> basic_istream<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span> <span class="br0">{</span>
<span class="kw1">public</span><span class="sy4">:</span>
<span class="kw1">using</span> char_type <span class="sy1">=</span> CharT<span class="sy4">;</span>
<span class="kw1">using</span> int_type <span class="sy1">=</span> <span class="kw1">typename</span> Traits<span class="sy4">::</span><span class="me2">int_type</span><span class="sy4">;</span>
<span class="kw1">using</span> pos_type <span class="sy1">=</span> <span class="kw1">typename</span> Traits<span class="sy4">::</span><span class="me2">pos_type</span><span class="sy4">;</span>
<span class="kw1">using</span> off_type <span class="sy1">=</span> <span class="kw1">typename</span> Traits<span class="sy4">::</span><span class="me2">off_type</span><span class="sy4">;</span>
<span class="kw1">using</span> traits_type <span class="sy1">=</span> Traits<span class="sy4">;</span>
<span class="co1">// &#26500;&#36896;&#20989;&#25968;</span>
<span class="kw1">explicit</span> basic_ispanstream<span class="br0">(</span>
std<span class="sy4">::</span><span class="me2">span</span><span class="sy1">&lt;</span>CharT<span class="sy1">&gt;</span> s,
ios_base<span class="sy4">::</span><span class="me2">openmode</span> which <span class="sy1">=</span> ios_base<span class="sy4">::</span><span class="me2">in</span><span class="br0">)</span><span class="sy4">;</span>
basic_ispanstream<span class="br0">(</span><span class="kw4">const</span> basic_ispanstream<span class="sy3">&amp;</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
basic_ispanstream<span class="br0">(</span>basic_ispanstream<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> ROS<span class="sy1">&gt;</span>
<span class="kw1">explicit</span> basic_ispanstream<span class="br0">(</span>ROS<span class="sy3">&amp;&amp;</span> s<span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// &#36171;&#20540;&#19982;&#20132;&#25442;</span>
basic_ispanstream<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> basic_ispanstream<span class="sy3">&amp;</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
basic_ispanstream<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span>basic_ispanstream<span class="sy3">&amp;&amp;</span> rhs<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">void</span> swap<span class="br0">(</span>basic_ispanstream<span class="sy3">&amp;</span> rhs<span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// &#25104;&#21592;</span>
basic_spanbuf<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy2">*</span> rdbuf<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
std<span class="sy4">::</span><span class="me2">span</span><span class="sy1">&lt;</span><span class="kw4">const</span> CharT<span class="sy1">&gt;</span> 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">void</span> span<span class="br0">(</span>std<span class="sy4">::</span><span class="me2">span</span><span class="sy1">&lt;</span>CharT<span class="sy1">&gt;</span> s<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> ROS<span class="sy1">&gt;</span>
<span class="kw4">void</span> span<span class="br0">(</span>ROS<span class="sy3">&amp;&amp;</span> s<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw1">private</span><span class="sy4">:</span>
basic_spanbuf<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span> sb<span class="sy4">;</span> <span class="co1">// &#20165;&#29992;&#20110;&#38416;&#37322;</span>
<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="sy1">&gt;</span>
<span class="kw4">void</span> swap<span class="br0">(</span>basic_ispanstream<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> x,
basic_ispanstream<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> y<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_ospanstream">&#31867;&#27169;&#26495; <span class="t-lc">std::basic_ospanstream</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;&gt;</span>
<span class="kw1">class</span> basic_ospanstream
<span class="sy4">:</span> <span class="kw1">public</span> basic_ostream<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span> <span class="br0">{</span>
<span class="kw1">public</span><span class="sy4">:</span>
<span class="kw1">using</span> char_type <span class="sy1">=</span> CharT<span class="sy4">;</span>
<span class="kw1">using</span> int_type <span class="sy1">=</span> <span class="kw1">typename</span> Traits<span class="sy4">::</span><span class="me2">int_type</span><span class="sy4">;</span>
<span class="kw1">using</span> pos_type <span class="sy1">=</span> <span class="kw1">typename</span> Traits<span class="sy4">::</span><span class="me2">pos_type</span><span class="sy4">;</span>
<span class="kw1">using</span> off_type <span class="sy1">=</span> <span class="kw1">typename</span> Traits<span class="sy4">::</span><span class="me2">off_type</span><span class="sy4">;</span>
<span class="kw1">using</span> traits_type <span class="sy1">=</span> Traits<span class="sy4">;</span>
<span class="co1">// &#26500;&#36896;&#20989;&#25968;</span>
<span class="kw1">explicit</span> basic_ospanstream<span class="br0">(</span>
std<span class="sy4">::</span><span class="me2">span</span><span class="sy1">&lt;</span>CharT<span class="sy1">&gt;</span> s,
ios_base<span class="sy4">::</span><span class="me2">openmode</span> which <span class="sy1">=</span> ios_base<span class="sy4">::</span><span class="me2">out</span><span class="br0">)</span><span class="sy4">;</span>
basic_ospanstream<span class="br0">(</span><span class="kw4">const</span> basic_ospanstream<span class="sy3">&amp;</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
basic_ospanstream<span class="br0">(</span>basic_ospanstream<span class="sy3">&amp;&amp;</span> rhs<span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// &#36171;&#20540;&#19982;&#20132;&#25442;</span>
basic_ospanstream<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> basic_ospanstream<span class="sy3">&amp;</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
basic_ospanstream<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span>basic_ospanstream<span class="sy3">&amp;&amp;</span> rhs<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">void</span> swap<span class="br0">(</span>basic_ospanstream<span class="sy3">&amp;</span> rhs<span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// &#25104;&#21592;</span>
basic_spanbuf<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy2">*</span> rdbuf<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
std<span class="sy4">::</span><span class="me2">span</span><span class="sy1">&lt;</span>CharT<span class="sy1">&gt;</span> 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">void</span> span<span class="br0">(</span>std<span class="sy4">::</span><span class="me2">span</span><span class="sy1">&lt;</span>CharT<span class="sy1">&gt;</span> s<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw1">private</span><span class="sy4">:</span>
basic_spanbuf<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span> sb<span class="sy4">;</span> <span class="co1">// &#20165;&#29992;&#20110;&#38416;&#37322;</span>
<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="sy1">&gt;</span>
<span class="kw4">void</span> swap<span class="br0">(</span>basic_ospanstream<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> x,
basic_ospanstream<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> y<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_spanstream">&#31867;&#27169;&#26495; <span class="t-lc">std::basic_spanstream</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;&gt;</span>
<span class="kw1">class</span> basic_spanstream
<span class="sy4">:</span> <span class="kw1">public</span> basic_iostream<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span> <span class="br0">{</span>
<span class="kw1">public</span><span class="sy4">:</span>
<span class="kw1">using</span> char_type <span class="sy1">=</span> charT<span class="sy4">;</span>
<span class="kw1">using</span> int_type <span class="sy1">=</span> <span class="kw1">typename</span> Traits<span class="sy4">::</span><span class="me2">int_type</span><span class="sy4">;</span>
<span class="kw1">using</span> pos_type <span class="sy1">=</span> <span class="kw1">typename</span> Traits<span class="sy4">::</span><span class="me2">pos_type</span><span class="sy4">;</span>
<span class="kw1">using</span> off_type <span class="sy1">=</span> <span class="kw1">typename</span> Traits<span class="sy4">::</span><span class="me2">off_type</span><span class="sy4">;</span>
<span class="kw1">using</span> traits_type <span class="sy1">=</span> Traits<span class="sy4">;</span>
<span class="co1">// &#26500;&#36896;&#20989;&#25968;</span>
<span class="kw1">explicit</span> basic_spanstream<span class="br0">(</span>
std<span class="sy4">::</span><span class="me2">span</span><span class="sy1">&lt;</span>CharT<span class="sy1">&gt;</span> s,
ios_base<span class="sy4">::</span><span class="me2">openmode</span> which <span class="sy1">=</span> ios_base<span class="sy4">::</span><span class="me2">out</span> <span class="sy3">|</span> ios_base<span class="sy4">::</span><span class="me2">in</span><span class="br0">)</span><span class="sy4">;</span>
basic_spanstream<span class="br0">(</span><span class="kw4">const</span> basic_spanstream<span class="sy3">&amp;</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
basic_spanstream<span class="br0">(</span>basic_spanstream<span class="sy3">&amp;&amp;</span> rhs<span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// &#36171;&#20540;&#19982;&#20132;&#25442;</span>
basic_spanstream<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> basic_spanstream<span class="sy3">&amp;</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
basic_spanstream<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span>basic_spanstream<span class="sy3">&amp;&amp;</span> rhs<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">void</span> swap<span class="br0">(</span>basic_spanstream<span class="sy3">&amp;</span> rhs<span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// &#25104;&#21592;</span>
basic_spanbuf<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy2">*</span> rdbuf<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
std<span class="sy4">::</span><span class="me2">span</span><span class="sy1">&lt;</span>CharT<span class="sy1">&gt;</span> 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">void</span> span<span class="br0">(</span>std<span class="sy4">::</span><span class="me2">span</span><span class="sy1">&lt;</span>CharT<span class="sy1">&gt;</span> s<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw1">private</span><span class="sy4">:</span>
basic_spanbuf<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span> sb<span class="sy4">;</span> <span class="co1">// &#20165;&#29992;&#20110;&#38416;&#37322;</span>
<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="sy1">&gt;</span>
<span class="kw4">void</span> swap<span class="br0">(</span>basic_spanstream<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> x,
basic_spanstream<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> y<span class="br0">)</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div>
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