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<title>std::basic_spanstream&lt;CharT,Traits&gt;::basic_spanstream</title>
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::basic_spanstream&lt;CharT,Traits&gt;::</span>basic_spanstream</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_spanstream.html">basic spanstream</a></span></div>
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<div><span class="mw-geshi cpp source-cpp"><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, <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> mode <span class="sy1">=</span><br />
&nbsp; &nbsp; &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>(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">basic_spanstream<span class="br0">(</span> basic_spanstream<span class="sy3">&amp;&amp;</span> rhs <span class="br0">)</span><span class="sy4">;</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">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></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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<p>&#26500;&#36896;&#26032;&#30340; <code>basic_spanstream</code> &#12290;</p>
<div class="t-li1"><span class="t-li">1)</span> &#20197; <code>s</code> &#25152;&#24341;&#29992;&#30340;&#23384;&#20648;&#20026;&#21253;&#35013;&#30340; <span class="t-lc">std::basic_spanbuf</span> &#35774;&#22791;&#30340;&#21021;&#22987;&#24213;&#23618;&#32531;&#20914;&#21306;&#12290;&#20197; <span class="t-c"><span class="mw-geshi cpp source-cpp">basic_spanbuf<span class="sy1">&lt;</span>Char, Traits<span class="sy1">&gt;</span><span class="br0">(</span>s, mode<span class="br0">)</span></span></span> &#26500;&#36896;&#21253;&#35013;&#30340; <span class="t-lc">std::basic_spanbuf</span> &#23545;&#35937;&#12290;</div>
<div class="t-li1"><span class="t-li">2)</span> &#31227;&#21160;&#26500;&#36896;&#20989;&#25968;&#12290;&#20174; <code>rhs</code> &#30340; <span class="t-lc"><a href="cpp-io-basic_iostream.html">std::basic_iostream</a></span> &#22522;&#31867;&#23376;&#23545;&#35937;&#21644;&#21253;&#35013;&#30340; <span class="t-lc">std::basic_spanbuf</span> &#31227;&#21160;&#26500;&#36896;&#23545;&#24212;&#30340;&#23376;&#23545;&#35937;&#65292;&#28982;&#21518;&#20197; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">*</span>this</span></span> &#20013;&#21253;&#35013;&#30340; <span class="t-lc">std::basic_spanbuf</span> &#30340;&#22320;&#22336;&#35843;&#29992; <span class="t-lc"><a href="cpp-io-basic_ios-set_rdbuf.html">set_rdbuf</a></span> &#20197;&#23433;&#35013;&#23427;&#12290;</div>
<div class="t-li1"><span class="t-li">3)</span> &#22797;&#21046;&#26500;&#36896;&#20989;&#25968;&#34987;&#21024;&#38500;&#12290; <code>basic_spanstream</code> &#19981;&#21487;&#22797;&#21046;&#12290;</div>
<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">&#21442;&#25968;</span></h3>
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<td>s</td>
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<td>&#24341;&#29992;&#35201;&#20316;&#20026;&#27969;&#30340;&#21021;&#22987;&#24213;&#23618;&#32531;&#20914;&#21306;&#30340;&#23384;&#20648;&#30340; <span class="t-lc">std::span</span></td>
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<td>mode</td>
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<td>&#25351;&#23450;&#25171;&#24320;&#27169;&#24335;&#12290;&#21487;&#20197;&#29992;&#19979;&#21015;&#24120;&#37327;&#25110;&#23427;&#20204;&#20043;&#38388;&#30340;&#36880;&#20301;&#25110;&#65306;
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<td>&#24120;&#37327;</td>
<td>&#35299;&#37322;</td>
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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>
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<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>
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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>
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<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>
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<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>
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<td>other</td>
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<td>&#35201;&#31227;&#21160;&#30340;&#21478;&#19968; <code>basic_spanstream</code></td>
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<h3><span class="mw-headline" id=".E5.BC.82.E5.B8.B8">&#24322;&#24120;</span></h3>
<p>&#21487;&#33021;&#25243;&#20986;&#23454;&#29616;&#23450;&#20041;&#30340;&#24322;&#24120;&#12290;</p>
<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">&#31034;&#20363;</span></h3>
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<td class="mbox-text" style="">&#26412;&#33410;&#26410;&#23436;&#25104;<br />
&#21407;&#22240;&#65306;&#26242;&#26080;&#31034;&#20363;</td>
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<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">&#21442;&#38405;</span></h3>
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<div><a href="cpp-io-basic_spanbuf-basic_spanbuf.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>
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<td>&#26500;&#36896; <code>basic_spanbuf</code> &#23545;&#35937;<br />
<span class="t-mark">(<code>std::basic_spanbuf&lt;CharT,Traits&gt;</code> &#30340;&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
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