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<div class="identifier-type">function template</div><div class="header"><iterator></div><h1 itemprop="name"><span class="namespace" title="namespace std">std::</span><span class="token">operator+ (非メンバ関数)</span><span class="cpp cpp11" title="C++11で追加">(C++11)</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">Iterator</span><span class="o">></span>
<span class="w"> </span><span class="n">move_iterator</span><span class="o"><</span><span class="n">Iterator</span><span class="o">></span><span class="w"> </span><span class="k">operator</span><span class="o">+</span><span class="p">(</span>
<span class="w"> </span><span class="k">typename</span><span class="w"> </span><span class="nc">move_iterator</span><span class="o"><</span><span class="n">Iterator</span><span class="o">>::</span><span class="n">difference_type</span><span class="w"> </span><span class="n">n</span><span class="p">,</span>
<span class="w"> </span><span class="k">const</span><span class="w"> </span><span class="n">move_iterator</span><span class="o"><</span><span class="n">Iterator</span><span class="o">>&</span><span class="w"> </span><span class="n">x</span><span class="p">);</span><span class="w"> </span><span class="c1">// C++11</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">Iterator</span><span class="o">></span>
<span class="w"> </span><span class="k">constexpr</span><span class="w"> </span><span class="n">move_iterator</span><span class="o"><</span><span class="n">Iterator</span><span class="o">></span><span class="w"> </span><span class="k">operator</span><span class="o">+</span><span class="p">(</span>
<span class="w"> </span><span class="k">typename</span><span class="w"> </span><span class="nc">move_iterator</span><span class="o"><</span><span class="n">Iterator</span><span class="o">>::</span><span class="n">difference_type</span><span class="w"> </span><span class="n">n</span><span class="p">,</span>
<span class="w"> </span><span class="k">const</span><span class="w"> </span><span class="n">move_iterator</span><span class="o"><</span><span class="n">Iterator</span><span class="o">>&</span><span class="w"> </span><span class="n">x</span><span class="p">);</span><span class="w"> </span><span class="c1">// C++17</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">Iterator</span><span class="o">></span>
<span class="w"> </span><span class="k">constexpr</span><span class="w"> </span><span class="n">move_iterator</span><span class="o"><</span><span class="n">Iterator</span><span class="o">></span><span class="w"> </span><span class="k">operator</span><span class="o">+</span><span class="p">(</span>
<span class="w"> </span><span class="n"><a href="../iter_difference_t.html">iter_difference_t</a></span><span class="o"><</span><span class="n">Iterator</span><span class="o">></span><span class="w"> </span><span class="n">n</span><span class="p">,</span>
<span class="w"> </span><span class="k">const</span><span class="w"> </span><span class="n">move_iterator</span><span class="o"><</span><span class="n">Iterator</span><span class="o">>&</span><span class="w"> </span><span class="n">x</span><span class="p">);</span><span class="w"> </span><span class="c1">// C++20</span>
<span class="p">}</span>
</code></pre></div>
</p>
<h2>概要</h2>
<p>イテレータを<code>n</code>回進める。</p>
<h2><a class="cpprefjp-defined-word" data-desc="関数等の意味論を構成する要素の1つ。Constraints。関数であればオーバーロード解決に参加するための条件、それ以外であれば受け付ける型の条件">テンプレートパラメータ制約</a></h2>
<p><code>x + n</code>が有効であり、<a class="cpprefjp-defined-word" data-desc="関数呼び出し式の評価結果となるオブジェクト・値">戻り値</a>型が<code>Iterator</code>であること。</p>
<h2><a class="cpprefjp-defined-word" data-desc="関数呼び出し式の評価結果となるオブジェクト・値">戻り値</a></h2>
<p><code>return x + n;</code></p>
<h2>例</h2>
<p><div class="yata" id="80cc41a208b73efe718769a42af6fbadc355daff"><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="../../memory.html"><memory></a></span>
<span class="cp">#include <a href="../../iterator.html"><iterator></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="n"><a href="../../memory/unique_ptr.html">std::unique_ptr</a></span><span class="o"><</span><span class="kt">int</span><span class="o">>></span><span class="w"> </span><span class="n">v</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">i</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span><span class="p">;</span><span class="w"> </span><span class="n">i</span><span class="w"> </span><span class="o"><</span><span class="w"> </span><span class="mi">5</span><span class="p">;</span><span class="w"> </span><span class="o">++</span><span class="n">i</span><span class="p">)</span>
<span class="w"> </span><span class="n"><a href="../../vector/vector/emplace_back.html">v.emplace_back</a></span><span class="p">(</span><span class="k">new</span><span class="w"> </span><span class="kt">int</span><span class="p">(</span><span class="n">i</span><span class="p">));</span>
<span class="w"> </span><span class="k">auto</span><span class="w"> </span><span class="n">it</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n"><a href="../make_move_iterator.html">std::make_move_iterator</a></span><span class="p">(</span><span class="n"><a href="../../vector/vector/begin.html">v.begin()</a></span><span class="p">);</span>
<span class="w"> </span><span class="k">auto</span><span class="w"> </span><span class="n">it2</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n"><span style="color:#ff0000">2 + it</span></span><span class="p">;</span>
<span class="w"> </span><span class="n"><a href="../../memory/unique_ptr.html">std::unique_ptr</a></span><span class="o"><</span><span class="kt">int</span><span class="o">></span><span class="w"> </span><span class="n">p</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="o">*</span><span class="n">it2</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="o">*</span><span class="n">p</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="p">}</span>
</code></pre></div>
</div></p>
<h3>出力</h3>
<p><pre><code>2
</code></pre></p>
<h2>バージョン</h2>
<h3>言語</h3>
<ul>
<li>C++11</li>
</ul>
<h3>処理系</h3>
<ul>
<li><a href="../../../implementation.html#clang">Clang</a>: ??</li>
<li><a href="../../../implementation.html#gcc">GCC</a>: 4.7.0 <span aria-label="検証済" role="img" title="検証済">✅</span></li>
<li><a href="../../../implementation.html#icc">ICC</a>: ??</li>
<li><a href="../../../implementation.html#visual_cpp">Visual C++</a>: ??</li>
</ul>
<h2>参照</h2>
<ul>
<li><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2015/p0031r0.html" target="_blank">P0031R0 A Proposal to Add Constexpr Modifiers to <code>reverse_iterator</code>, <code>move_iterator</code>, <code>array</code> and Range Access</a></li>
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