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<title>std::ostreambuf_iterator&lt;CharT,Traits&gt;::ostreambuf_iterator</title>
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::ostreambuf_iterator&lt;CharT,Traits&gt;::</span>ostreambuf_iterator</h1>
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<div id="contentSub"><span class="subpages">&lt; <a href="cpp.html">cpp</a>&lrm; | <a href="cpp-iterator.html">iterator</a>&lrm; | <a href="cpp-iterator-ostreambuf_iterator.html">ostreambuf iterator</a></span></div>
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<td rowspan="142">(1)</td>
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<div><span class="mw-geshi cpp source-cpp">ostreambuf_iterator<span class="br0">(</span> streambuf_type<span class="sy2">*</span> buffer <span class="br0">)</span> <span class="kw1">throw</span><span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span></span></div>
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<td><span class="t-mark-rev t-until-cxx11">(C++11 &#21069;)</span></td>
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<div><span class="mw-geshi cpp source-cpp">ostreambuf_iterator<span class="br0">(</span> streambuf_type<span class="sy2">*</span> buffer <span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span></span></div>
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<td><span class="t-mark-rev t-since-cxx11">(C++11 &#36215;)</span></td>
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<td rowspan="142">(2)</td>
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<div><span class="mw-geshi cpp source-cpp">ostreambuf_iterator<span class="br0">(</span> ostream_type<span class="sy3">&amp;</span> stream <span class="br0">)</span> <span class="kw1">throw</span><span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span></span></div>
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<td><span class="t-mark-rev t-until-cxx11">(C++11 &#21069;)</span></td>
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<div><span class="mw-geshi cpp source-cpp">ostreambuf_iterator<span class="br0">(</span> ostream_type<span class="sy3">&amp;</span> stream <span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span></span></div>
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<td><span class="t-mark-rev t-since-cxx11">(C++11 &#36215;)</span></td>
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<div class="t-li1"><span class="t-li">1)</span> &#26500;&#36896;&#36845;&#20195;&#22120;&#65292;&#23558;&#31169;&#26377;&#30340; <span class="t-c"><span class="mw-geshi cpp source-cpp">streambuf_type<span class="sy2">*</span></span></span> &#25104;&#21592;&#35774;&#20026; <code>buffer</code> &#24182;&#23558; <a href="cpp-iterator-ostreambuf_iterator-failed.html"><tt>failed()</tt></a> &#26631;&#24535;&#35774;&#20026; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw2">false</span></span></span> &#12290;&#33509; <code>buffer</code> &#26159;&#31354;&#25351;&#38024;&#21017;&#34892;&#20026;&#26410;&#23450;&#20041;&#12290;</div>
<div class="t-li1"><span class="t-li">2)</span> &#21516; <span class="t-c"><span class="mw-geshi cpp source-cpp">ostreambuf_iterator<span class="br0">(</span>stream.<span class="me1">rdbuf</span><span class="br0">(</span><span class="br0">)</span><span class="br0">)</span></span></span> &#12290;</div>
<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">&#21442;&#25968;</span></h3>
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<td>stream</td>
<td>-</td>
<td>&#23558;&#20851;&#32852;&#20854; rdbuf() &#21040;&#27492;&#36845;&#20195;&#22120;&#30340;&#36755;&#20986;&#27969;</td>
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<td>buffer</td>
<td>-</td>
<td>&#27492;&#36845;&#20195;&#22120;&#35201;&#35775;&#38382;&#30340;&#36755;&#20986;&#27969;&#32531;&#20914;</td>
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<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">&#31034;&#20363;</span></h3>
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<pre class="de1"><span class="co2">#include &lt;iostream&gt;</span>
<span class="co2">#include &lt;fstream&gt;</span>
<span class="co2">#include &lt;iterator&gt;</span>
<span class="kw4">int</span> main<span class="br0">(</span><span class="br0">)</span>
<span class="br0">{</span>
<a href="cpp-io-basic_filebuf.html"><span class="kw1667">std::<span class="me2">basic_filebuf</span></span></a><span class="sy1">&lt;</span><span class="kw4">char</span><span class="sy1">&gt;</span> f<span class="sy4">;</span>
f.<span class="me1">open</span><span class="br0">(</span><span class="st0">&quot;test.txt&quot;</span>, std<span class="sy4">::</span><span class="me2">ios</span><span class="sy4">::</span><span class="me2">out</span><span class="br0">)</span><span class="sy4">;</span>
<a href="cpp-iterator-ostreambuf_iterator.html"><span class="kw671">std::<span class="me2">ostreambuf_iterator</span></span></a><span class="sy1">&lt;</span><span class="kw4">char</span><span class="sy1">&gt;</span> out1<span class="br0">(</span><span class="sy3">&amp;</span>f<span class="br0">)</span><span class="sy4">;</span>
<a href="cpp-iterator-ostreambuf_iterator.html"><span class="kw671">std::<span class="me2">ostreambuf_iterator</span></span></a><span class="sy1">&lt;</span><span class="kw4">wchar_t</span><span class="sy1">&gt;</span> out2<span class="br0">(</span><a href="cpp-io-cout.html"><span class="kw1759">std::<span class="me2">wcout</span></span></a><span class="br0">)</span><span class="sy4">;</span>
<span class="sy2">*</span>out1 <span class="sy1">=</span> <span class="st0">&#39;a&#39;</span><span class="sy4">;</span>
<span class="sy2">*</span>out2 <span class="sy1">=</span> L<span class="st0">&#39;a&#39;</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div>
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<h3><span class="mw-headline" id=".E7.BC.BA.E9.99.B7.E6.8A.A5.E5.91.8A">&#32570;&#38519;&#25253;&#21578;</span></h3>
<p>&#19979;&#21015;&#26356;&#25913;&#34892;&#20026;&#30340;&#32570;&#38519;&#25253;&#21578;&#36861;&#28335;&#22320;&#24212;&#29992;&#20110;&#20197;&#21069;&#20986;&#29256;&#30340; C++ &#26631;&#20934;&#12290;</p>
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<th>DR</th>
<th>&#24212;&#29992;&#20110;</th>
<th>&#20986;&#29256;&#26102;&#30340;&#34892;&#20026;</th>
<th>&#27491;&#30830;&#34892;&#20026;</th>
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<td><a rel="nofollow" class="external text" href="https://wg21.link/P2325R3">P2325R3</a></td>
<td>C++20</td>
<td>&#30001;&#20110; C++20 &#36845;&#20195;&#22120;&#24517;&#39035;&#20026; <a href="cpp-concepts-default_initializable.html"><code>default_initializable</code></a> &#25552;&#20379;&#20102;&#40664;&#35748;&#26500;&#36896;&#20989;&#25968;</td>
<td>&#19982;&#35813;&#35201;&#27714;&#19968;&#21516;&#31227;&#38500;</td>
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