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<div class="identifier-type">class template</div><div class="header"><iterator></div><h1 itemprop="name"><span class="namespace" title="namespace std">std::</span><span class="token">back_insert_iterator</span></h1>
<div itemprop="articleBody"><p><div class="codehilite"><pre><span></span><code><span class="k">namespace</span><span class="w"> </span><span class="nn">std</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="k">template</span><span class="w"> </span><span class="o"><</span><span class="k">class</span><span class="w"> </span><span class="nc">Container</span><span class="o">></span>
<span class="w"> </span><span class="k">class</span><span class="w"> </span><span class="nc">back_insert_iterator</span>
<span class="w"> </span><span class="o">:</span><span class="w"> </span><span class="k">public</span><span class="w"> </span><span class="n"><a href="iterator.html">iterator</a></span><span class="o"><</span><span class="n"><a href="iterator_tag.html">output_iterator_tag</a></span><span class="p">,</span><span class="w"> </span><span class="kt">void</span><span class="p">,</span><span class="w"> </span><span class="kt">void</span><span class="p">,</span><span class="w"> </span><span class="kt">void</span><span class="p">,</span><span class="w"> </span><span class="kt">void</span><span class="o">></span><span class="p">;</span>
<span class="p">}</span>
</code></pre></div>
</p>
<h2>概要</h2>
<p><code>back_insert_iterator</code>は出力イテレータであり、代入の際にコンテナの<code>push_back()</code>メンバ関数を呼び出すイテレータアダプタである。</p>
<h2>メンバ関数</h2>
<table border="1" bordercolor="#888" style="border-collapse:collapse">
<thead>
<tr>
<th>名前</th>
<th>説明</th>
<th>対応バージョン</th>
</tr>
</thead>
<tbody>
<tr>
<td><code><a href="back_insert_iterator/op_constructor.html">(constructor)</a></code></td>
<td>コンストラクタ</td>
<td></td>
</tr>
<tr>
<td><code>~back_insert_iterator() = default</code></td>
<td>デストラクタ</td>
<td></td>
</tr>
<tr>
<td><code><a href="back_insert_iterator/op_assign.html">operator=</a></code></td>
<td>代入演算子</td>
<td></td>
</tr>
<tr>
<td><code><a href="back_insert_iterator/op_deref.html">operator*</a></code></td>
<td>間接参照演算子</td>
<td></td>
</tr>
<tr>
<td><code><a href="back_insert_iterator/op_increment.html">operator++</a></code></td>
<td>イテレータをインクリメントする</td>
<td></td>
</tr>
</tbody>
</table>
<h2>protectedメンバ変数</h2>
<table border="1" bordercolor="#888" style="border-collapse:collapse">
<thead>
<tr>
<th>変数名</th>
<th>型</th>
<th>対応バージョン</th>
</tr>
</thead>
<tbody>
<tr>
<td><code>container</code></td>
<td><code>Container*</code></td>
<td></td>
</tr>
</tbody>
</table>
<h2>メンバ型</h2>
<table border="1" bordercolor="#888" style="border-collapse:collapse">
<thead>
<tr>
<th>名前</th>
<th>説明</th>
<th>対応バージョン</th>
</tr>
</thead>
<tbody>
<tr>
<td><code>container_type</code></td>
<td><code>Container</code></td>
<td></td>
</tr>
<tr>
<td><code>difference_type</code></td>
<td><code>void</code></td>
<td></td>
</tr>
<tr>
<td><code>difference_type</code></td>
<td><code>ptrdiff_t</code></td>
<td>C++20</td>
</tr>
<tr>
<td><code>pointer</code></td>
<td><code>void</code></td>
<td></td>
</tr>
<tr>
<td><code>value_type</code></td>
<td><code>void</code></td>
<td></td>
</tr>
<tr>
<td><code>iterator_category</code></td>
<td><code><a href="iterator_tag.html">output_iterator_tag</a></code></td>
<td></td>
</tr>
<tr>
<td><code>reference</code></td>
<td><code>void</code></td>
<td></td>
</tr>
</tbody>
</table>
<h2>非メンバ関数</h2>
<table border="1" bordercolor="#888" style="border-collapse:collapse">
<thead>
<tr>
<th>名前</th>
<th>説明</th>
<th>対応バージョン</th>
</tr>
</thead>
<tbody>
<tr>
<td><code><a href="back_inserter.html">back_inserter</a></code></td>
<td><code>back_insert_iterator</code>のヘルパ関数</td>
<td></td>
</tr>
</tbody>
</table>
<h2>例</h2>
<p><div class="yata" id="4fee8fcae25ebcfb9cd57a048f3f9f9c5bb49933"><div class="codehilite"><pre><span></span><code><span class="cp">#include <a href="../iostream.html"><iostream></a></span>
<span class="cp">#include <a href="../vector.html"><vector></a></span>
<span class="cp">#include <a href="../iterator.html"><iterator></a></span>
<span class="cp">#include <a href="../algorithm.html"><algorithm></a></span>
<span class="kt">int</span><span class="w"> </span><span class="nf">main</span><span class="p">()</span>
<span class="p">{</span>
<span class="w"> </span><span class="n"><a href="../vector/vector.html">std::vector</a></span><span class="o"><</span><span class="kt">int</span><span class="o">></span><span class="w"> </span><span class="n">src</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">{</span><span class="mi">1</span><span class="p">,</span><span class="w"> </span><span class="mi">2</span><span class="p">,</span><span class="w"> </span><span class="mi">3</span><span class="p">};</span>
<span class="w"> </span><span class="n"><a href="../vector/vector.html">std::vector</a></span><span class="o"><</span><span class="kt">int</span><span class="o">></span><span class="w"> </span><span class="n">dest</span><span class="p">;</span>
<span class="w"> </span><span class="c1">// srcの要素をdestに追加しながらコピー</span>
<span class="w"> </span><span class="n"><a href="../vector/vector/reserve.html">dest.reserve</a></span><span class="p">(</span><span class="n"><a href="../vector/vector/size.html">src.size()</a></span><span class="p">);</span>
<span class="w"> </span><span class="n"><a href="../algorithm/copy.html">std::copy</a></span><span class="p">(</span><span class="n"><a href="../vector/vector/begin.html">src.begin()</a></span><span class="p">,</span><span class="w"> </span><span class="n"><a href="../vector/vector/end.html">src.end()</a></span><span class="p">,</span><span class="w"> </span><span class="n"><span style="color:#ff0000">std::back_inserter</span></span><span class="p">(</span><span class="n">dest</span><span class="p">));</span>
<span class="w"> </span><span class="k">for</span><span class="w"> </span><span class="p">(</span><span class="kt">int</span><span class="w"> </span><span class="n">x</span><span class="w"> </span><span class="o">:</span><span class="w"> </span><span class="n">dest</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n"><a href="../iostream/cout.html">std::cout</a></span><span class="w"> </span><span class="o"><<</span><span class="w"> </span><span class="n">x</span><span class="w"> </span><span class="o"><<</span><span class="w"> </span><span class="n"><a href="../ostream/endl.html">std::endl</a></span><span class="p">;</span>
<span class="w"> </span><span class="p">}</span>
<span class="p">}</span>
</code></pre></div>
</div></p>
<h3>出力</h3>
<p><pre><code>1
2
3
</code></pre></p>
<h2>参照</h2>
<ul>
<li><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0896r4.pdf" target="_blank">P0896R4 The One Ranges Proposal (was Merging the Ranges TS)</a></li>
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