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  <div class="identifier-type">function</div><div class="header">&lt;istream&gt;</div><h1 itemprop="name"><span class="namespace" title="namespace std">std::</span><span class="class" title="class basic_iostream">basic_iostream::</span><span class="token">コンストラクタ</span></h1>
<div itemprop="articleBody"><p><div class="codehilite"><pre><span></span><code><span class="k">public</span><span class="o">:</span>
<span class="w">  </span><span class="k">explicit</span><span class="w"> </span><span class="n"><a href="../basic_iostream.html">basic_iostream</a></span><span class="p">(</span><span class="n"><a href="../../streambuf/basic_streambuf.html">basic_streambuf</a></span><span class="o">&lt;</span><span class="n">CharT</span><span class="p">,</span><span class="w"> </span><span class="n">Traits</span><span class="o">&gt;*</span><span class="w"> </span><span class="n">sb</span><span class="p">);</span><span class="w"> </span><span class="c1">// (1) C++98</span>

<span class="k">protected</span><span class="o">:</span>
<span class="w">  </span><span class="n"><a href="../basic_iostream.html">basic_iostream</a></span><span class="p">(</span><span class="k">const</span><span class="w"> </span><span class="n"><a href="../basic_iostream.html">basic_iostream</a></span><span class="o">&amp;</span><span class="w"> </span><span class="n">rhs</span><span class="p">)</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">delete</span><span class="p">;</span><span class="w">          </span><span class="c1">// (2) C++11</span>

<span class="w">  </span><span class="n"><a href="../basic_iostream.html">basic_iostream</a></span><span class="p">(</span><span class="n"><a href="../basic_iostream.html">basic_iostream</a></span><span class="o">&amp;&amp;</span><span class="w"> </span><span class="n">rhs</span><span class="p">);</span><span class="w">                        </span><span class="c1">// (3) C++11</span>
</code></pre></div>
</p>
<h2>概要</h2>
<p>入出力ストリームオブジェクトを構築する。</p>
<ul>
<li>(1) : ストリームバッファを受け取って構築する</li>
<li>(2) : コピーコンストラクタ。コピー構築不可</li>
<li>(3) : ムーブコンストラクタ</li>
</ul>
<h2>効果</h2>
<ul>
<li>(1) : 基底クラスのコンストラクタ呼び出しとして、<code><a href="../basic_istream.html">basic_istream</a>&lt;CharT, Traits&gt;(sb)</code>と<code><a href="../../ostream/basic_ostream.html">basic_ostream</a>&lt;CharT, Traits&gt;(sb)</code>を実行する。</li>
<li>(3) : 基底クラスの<code><a href="../basic_istream.html">basic_istream</a>&lt;CharT, Traits&gt;</code>を<code>rhs</code>からムーブ構築する。</li>
</ul>
<h2>備考</h2>
<ul>
<li>(2) :<ul>
<li>C++98 : このコンストラクタは宣言されていなかった。コピー構築を行おうとするとコンパイラがコピーコンストラクタを暗黙に生成しようとするが、基底クラスの<code><a href="../../ios/basic_ios.html">basic_ios</a></code>のコピーコンストラクタがアクセス指定子<code>private</code>で宣言されているため、エラーとなっていた</li>
<li>C++11 : アクセス指定子<code>protected</code>で<code>delete</code>定義される。誤ってコピーしようとした際のエラーメッセージが分かりやすくなる</li>
</ul>
</li>
</ul>
<h2>バージョン</h2>
<h3>言語</h3>
<ul>
<li>C++98</li>
</ul>
<h2>関連項目</h2>
<ul>
<li><code><a href="../basic_iostream.html">basic_iostream</a>::<a href="op_destructor.html">~basic_iostream</a></code></li>
<li><code><a href="../basic_iostream.html">basic_iostream</a>::<a href="op_assign.html">operator=</a></code></li>
<li><code><a href="../basic_iostream.html">basic_iostream</a>::<a href="swap.html">swap</a></code></li>
<li><code><a href="../basic_istream.html">basic_istream</a>::<a href="../basic_istream/op_constructor.html">basic_istream</a></code></li>
<li><code><a href="../../ostream/basic_ostream.html">basic_ostream</a>::<a href="../../ostream/basic_ostream/op_constructor.html">basic_ostream</a></code></li>
</ul>
<h2>参照</h2>
<ul>
<li><a href="https://cplusplus.github.io/LWG/issue911" target="_blank">LWG Issue 911. I/O streams and move/swap semantic</a><ul>
<li>C++11で、ムーブコンストラクタ・ムーブ代入演算子・<code>swap</code>が<code>protected</code>となり、非メンバ関数の<code>swap</code>が削除された。派生クラスのみが使用でき、基底クラスのオブジェクトを直接ムーブ・交換できないようにするため</li>
</ul>
</li>
</ul></div>

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