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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::basic_spanbuf&lt;CharT,Traits&gt;::</span>basic_spanbuf</h1>
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<div id="contentSub"><span class="subpages">&lt; <a href="cpp.html">cpp</a>&lrm; | <a href="cpp-io.html">io</a>&lrm; | <a href="cpp-io-basic_spanbuf.html">basic spanbuf</a></span></div>
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<div><span class="mw-geshi cpp source-cpp">basic_spanbuf<span class="br0">(</span><span class="br0">)</span> <span class="sy4">:</span> basic_spanbuf<span class="br0">(</span><a href="cpp-io-ios_base-openmode.html"><span class="kw1674">std::<span class="me2">ios_base</span><span class="sy4">::</span><span class="me2">in</span></span></a> <span class="sy3">|</span> <a href="cpp-io-ios_base-openmode.html"><span class="kw1675">std::<span class="me2">ios_base</span><span class="sy4">::</span><span class="me2">out</span></span></a><span class="br0">)</span> <span class="br0">{</span><span class="br0">}</span></span></div>
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<td>(1)</td>
<td><span class="t-mark-rev t-since-cxx23">(C++23 &#36215;)</span></td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">explicit</span> basic_spanbuf<span class="br0">(</span> <a href="cpp-io-ios_base-openmode.html"><span class="kw1671">std::<span class="me2">ios_base</span><span class="sy4">::</span><span class="me2">openmode</span></span></a> which <span class="br0">)</span><br />
&nbsp; &nbsp; <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></div>
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<td>(2)</td>
<td><span class="t-mark-rev t-since-cxx23">(C++23 &#36215;)</span></td>
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<div><span class="mw-geshi cpp source-cpp"><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> buf, <a href="cpp-io-ios_base-openmode.html"><span class="kw1671">std::<span class="me2">ios_base</span><span class="sy4">::</span><span class="me2">openmode</span></span></a> which <span class="sy1">=</span><br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <a href="cpp-io-ios_base-openmode.html"><span class="kw1674">std::<span class="me2">ios_base</span><span class="sy4">::</span><span class="me2">in</span></span></a> <span class="sy3">|</span> <a href="cpp-io-ios_base-openmode.html"><span class="kw1675">std::<span class="me2">ios_base</span><span class="sy4">::</span><span class="me2">out</span></span></a> <span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(3)</td>
<td><span class="t-mark-rev t-since-cxx23">(C++23 &#36215;)</span></td>
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<div><span class="mw-geshi cpp source-cpp">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></span></div>
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<td>(4)</td>
<td><span class="t-mark-rev t-since-cxx23">(C++23 &#36215;)</span></td>
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<div><span class="mw-geshi cpp source-cpp">basic_spanbuf<span class="br0">(</span> basic_spanbuf<span class="sy3">&amp;&amp;</span> rhs <span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(5)</td>
<td><span class="t-mark-rev t-since-cxx23">(C++23 &#36215;)</span></td>
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<div class="t-li1"><span class="t-li">1)</span> &#40664;&#35748;&#26500;&#36896;&#20989;&#25968;&#12290;&#21019;&#24314;&#26080;&#24213;&#23618;&#32531;&#20914;&#21306;&#19988;&#20026;&#36755;&#20837;&#21644;&#36755;&#20986;&#25171;&#24320;&#30340; <code>basic_spanbuf</code> &#12290;&#25351;&#21521;&#33719;&#21462;&#19982;&#25918;&#32622;&#21306;&#30340;&#25351;&#38024;&#34987;&#35774;&#20026;&#31354;&#25351;&#38024;&#20540;&#12290;</div>
<div class="t-li1"><span class="t-li">2)</span> &#21516; <span class="t-v">(1)</span> &#65292;&#38500;&#20102; <code>basic_spanbuf</code> &#20197; <code>which</code> &#25152;&#25351;&#23450;&#30340;&#27169;&#24335;&#25171;&#24320;&#12290;</div>
<div class="t-li1"><span class="t-li">3)</span> &#21019;&#24314;&#31649;&#29702; <code>buf</code> &#25152;&#24341;&#29992;&#30340;&#24213;&#23618;&#32531;&#20914;&#21306;&#65288;&#25110;&#33509; <code>buf</code> &#20026;&#31354;&#21017;&#26080;&#24213;&#23618;&#32531;&#20914;&#21306;&#65289;&#65292;&#24182;&#20197; <code>which</code> &#25152;&#25351;&#23450;&#30340;&#27169;&#24335;&#25171;&#24320;&#30340; <code>basic_spanbuf</code> &#12290;&#25351;&#21521;&#33719;&#21462;&#19982;&#25918;&#32622;&#21306;&#30340;&#25351;&#38024;&#25353;&#20197;&#19979;&#26041;&#24335;&#35774;&#32622;&#65292;&#25110;&#33509;&#34920;&#26684;&#20013;&#26410;&#25552;&#21450;&#21017;&#35774;&#32622;&#20026;&#31354;&#25351;&#38024;&#20540;&#65306;
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<th rowspan="2">&#25171;&#24320;&#27169;&#24335;&#20013;&#35774;&#32622;&#30340;&#20301;<br />
&#65288;&#24433;&#21709;&#25351;&#21521;&#33719;&#21462;&#21306;&#30340;&#25351;&#38024;&#65289;</th>
<th colspan="3">&#35774;&#32622;&#21518;&#30340;&#36820;&#22238;&#20540;</th>
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<td><span class="t-lc"><a href="cpp-io-basic_streambuf-gptr.html">eback()</a></span></td>
<td><span class="t-lc"><a href="cpp-io-basic_streambuf-gptr.html">gptr()</a></span></td>
<td><span class="t-lc"><a href="cpp-io-basic_streambuf-gptr.html">egptr()</a></span></td>
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<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-io-ios_base-openmode.html"><span class="kw1674">std::<span class="me2">ios_base</span><span class="sy4">::</span><span class="me2">in</span></span></a></span></span></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">s.<span class="me1">data</span><span class="br0">(</span><span class="br0">)</span></span></span></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">s.<span class="me1">data</span><span class="br0">(</span><span class="br0">)</span></span></span></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">s.<span class="me1">data</span><span class="br0">(</span><span class="br0">)</span> <span class="sy2">+</span> s.<span class="me1">size</span><span class="br0">(</span><span class="br0">)</span></span></span></td>
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<td colspan="4"></td>
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<th rowspan="2">&#25171;&#24320;&#27169;&#24335;&#20013;&#35774;&#32622;&#30340;&#20301;<br />
&#65288;&#24433;&#21709;&#25351;&#21521;&#25918;&#32622;&#21306;&#30340;&#25351;&#38024;&#65289;</th>
<th colspan="3">&#35774;&#32622;&#21518;&#30340;&#36820;&#22238;&#20540;</th>
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<td><span class="t-lc"><a href="cpp-io-basic_streambuf-pptr.html">pbase()</a></span></td>
<td><span class="t-lc"><a href="cpp-io-basic_streambuf-pptr.html">pptr()</a></span></td>
<td><span class="t-lc"><a href="cpp-io-basic_streambuf-pptr.html">epptr()</a></span></td>
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<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-io-ios_base-openmode.html"><span class="kw1675">std::<span class="me2">ios_base</span><span class="sy4">::</span><span class="me2">out</span></span></a> <span class="sy3">&amp;&amp;</span> <span class="sy3">!</span><a href="cpp-io-ios_base-openmode.html"><span class="kw1677">std::<span class="me2">ios_base</span><span class="sy4">::</span><span class="me2">ate</span></span></a></span></span></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">s.<span class="me1">data</span><span class="br0">(</span><span class="br0">)</span></span></span></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">s.<span class="me1">data</span><span class="br0">(</span><span class="br0">)</span></span></span></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">s.<span class="me1">data</span><span class="br0">(</span><span class="br0">)</span> <span class="sy2">+</span> s.<span class="me1">size</span><span class="br0">(</span><span class="br0">)</span></span></span></td>
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<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-io-ios_base-openmode.html"><span class="kw1675">std::<span class="me2">ios_base</span><span class="sy4">::</span><span class="me2">out</span></span></a> <span class="sy3">&amp;&amp;</span> <a href="cpp-io-ios_base-openmode.html"><span class="kw1677">std::<span class="me2">ios_base</span><span class="sy4">::</span><span class="me2">ate</span></span></a></span></span></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">s.<span class="me1">data</span><span class="br0">(</span><span class="br0">)</span></span></span></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">s.<span class="me1">data</span><span class="br0">(</span><span class="br0">)</span> <span class="sy2">+</span> s.<span class="me1">size</span><span class="br0">(</span><span class="br0">)</span></span></span></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">s.<span class="me1">data</span><span class="br0">(</span><span class="br0">)</span> <span class="sy2">+</span> s.<span class="me1">size</span><span class="br0">(</span><span class="br0">)</span></span></span></td>
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<div class="t-li1"><span class="t-li">4)</span> &#22797;&#21046;&#26500;&#36896;&#20989;&#25968;&#34987;&#21024;&#38500;&#12290;<code>basic_spanbuf</code> &#19981;&#21487;&#22797;&#21046;&#12290;</div>
<div class="t-li1"><span class="t-li">5)</span> &#31227;&#21160;&#26500;&#36896;&#20989;&#25968;&#12290;&#20174; <code>rhs</code> &#30340; <span class="t-lc"><a href="cpp-io-basic_streambuf.html">std::basic_streambuf</a></span> &#22522;&#31867;&#23376;&#23545;&#35937;&#31227;&#21160;&#26500;&#36896;&#35813;&#22522;&#31867;&#23376;&#23545;&#35937;&#12290;&#25351;&#21521;&#33719;&#21462;&#19982;&#25918;&#32622;&#21306;&#30340;&#25351;&#38024;&#12289;&#25171;&#24320;&#27169;&#24335;&#21450;&#24213;&#23618;&#32531;&#20914;&#21306;&#65288;&#33509;&#23384;&#22312;&#65289;&#31561;&#21516;&#20110; <code>rhs</code> &#22312;&#26500;&#36896;&#21069;&#30340;&#12290;<br />
<code>rhs</code> &#22312;&#31227;&#21160;&#26500;&#36896;&#21518;&#26159;&#21542;&#20173;&#28982;&#20445;&#26377;&#24213;&#23618;&#32531;&#20914;&#21306;&#26159;&#23454;&#29616;&#23450;&#20041;&#30340;&#12290;</div>
<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">&#21442;&#25968;</span></h3>
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<td>buf</td>
<td>-</td>
<td>&#24341;&#29992;&#24213;&#23618;&#32531;&#20914;&#21306;&#30340; <a href="cpp-container-span.html"><tt>std::span</tt></a></td>
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<td>rhs</td>
<td>-</td>
<td>&#21478;&#19968; <code>basic_spanbuf</code></td>
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<td>which</td>
<td>-</td>
<td>&#25351;&#23450;&#27969;&#25171;&#24320;&#27169;&#24335;&#12290;&#23427;&#26159;&#20301;&#25513;&#30721;&#31867;&#22411;&#65292;&#23450;&#20041;&#19979;&#21015;&#24120;&#37327;&#65306;
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<td>&#24120;&#37327;</td>
<td>&#35299;&#37322;</td>
</tr>
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<td><a href="cpp-io-ios_base-openmode.html"><tt>app</tt></a></td>
<td>&#27599;&#27425;&#20889;&#20837;&#21069;&#23547;&#20301;&#21040;&#27969;&#32467;&#23614;</td>
</tr>
<tr class="t-dsc">
<td><a href="cpp-io-ios_base-openmode.html"><tt>binary</tt></a></td>
<td>&#20197;<a href="cpp-io-c-FILE.html#.E4.BA.8C.E8.BF.9B.E5.88.B6.E4.B8.8E.E6.96.87.E6.9C.AC.E6.A8.A1.E5.BC.8F">&#20108;&#36827;&#21046;&#27169;&#24335;</a>&#25171;&#24320;</td>
</tr>
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<td><a href="cpp-io-ios_base-openmode.html"><tt>in</tt></a></td>
<td>&#20026;&#35835;&#25171;&#24320;</td>
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<td><a href="cpp-io-ios_base-openmode.html"><tt>out</tt></a></td>
<td>&#20026;&#20889;&#25171;&#24320;</td>
</tr>
<tr class="t-dsc">
<td><a href="cpp-io-ios_base-openmode.html"><tt>trunc</tt></a></td>
<td>&#22312;&#25171;&#24320;&#26102;&#33293;&#24323;&#27969;&#30340;&#20869;&#23481;</td>
</tr>
<tr class="t-dsc">
<td><a href="cpp-io-ios_base-openmode.html"><tt>ate</tt></a></td>
<td>&#25171;&#24320;&#21518;&#31435;&#21363;&#23547;&#20301;&#21040;&#27969;&#32467;&#23614;</td>
</tr>
</table>
</td>
</tr>
</table>
<h3><span class="mw-headline" id=".E6.B3.A8.E8.A7.A3">&#27880;&#35299;</span></h3>
<p>&#36825;&#20123;&#26500;&#36896;&#20989;&#25968;&#24120;&#30001; <span class="t-lc">std::basic_ispanstream</span>&#12289; <span class="t-lc">std::basic_ospanstream</span> &#21450; <span class="t-lc">std::basic_spanstream</span> &#30340;&#26500;&#36896;&#20989;&#25968;&#35843;&#29992;</p>
<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">&#31034;&#20363;</span></h3>
<table class="metadata plainlinks ambox mbox-small-left ambox-notice" style="">
<tr>
<td class="mbox-empty-cell"></td>
<td class="mbox-text" style="">&#26412;&#33410;&#26410;&#23436;&#25104;<br />
&#21407;&#22240;&#65306;&#26242;&#26080;&#31034;&#20363;</td>
</tr>
</table>
<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">&#21442;&#38405;</span></h3>
<table class="t-dsc-begin">
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<td>
<div class="t-dsc-member-div t-dsc-member-nobold-div">
<div><a href="cpp-io-basic_ispanstream-basic_ispanstream.html"><span class="t-lines"><span>(&#26500;&#36896;&#20989;&#25968;)</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>&#26500;&#36896; <code>basic_ispanstream</code><br />
<span class="t-mark">(<code>std::basic_ispanstream&lt;CharT,Traits&gt;</code> &#30340;&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div t-dsc-member-nobold-div">
<div><a href="cpp-io-basic_ospanstream-basic_ospanstream.html"><span class="t-lines"><span>(&#26500;&#36896;&#20989;&#25968;)</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>&#26500;&#36896; <code>basic_ospanstream</code><br />
<span class="t-mark">(<code>std::basic_ospanstream&lt;CharT,Traits&gt;</code> &#30340;&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div t-dsc-member-nobold-div">
<div><a href="cpp-io-basic_spanstream-basic_spanstream.html"><span class="t-lines"><span>(&#26500;&#36896;&#20989;&#25968;)</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>&#26500;&#36896; <code>basic_spanstream</code><br />
<span class="t-mark">(<code>std::basic_spanstream&lt;CharT,Traits&gt;</code> &#30340;&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
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</table>
</div>
<div class="visualClear"></div>
</div>
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</div>
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