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<div class="titlepage"><div><div><h5 class="title">
<a name="fusion.sequence.intrinsic.functions.swap"></a><a class="link" href="swap.html" title="swap">swap</a>
</h5></div></div></div>
<h6>
<a name="fusion.sequence.intrinsic.functions.swap.h0"></a>
<span><a name="fusion.sequence.intrinsic.functions.swap.description"></a></span><a class="link" href="swap.html#fusion.sequence.intrinsic.functions.swap.description">Description</a>
</h6>
<p>
Performs an element by element swap of the elements in 2 sequences.
</p>
<h6>
<a name="fusion.sequence.intrinsic.functions.swap.h1"></a>
<span><a name="fusion.sequence.intrinsic.functions.swap.synopsis"></a></span><a class="link" href="swap.html#fusion.sequence.intrinsic.functions.swap.synopsis">Synopsis</a>
</h6>
<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> <span class="identifier">Seq1</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">Seq2</span><span class="special">></span>
<span class="keyword">void</span> <span class="identifier">swap</span><span class="special">(</span><span class="identifier">Seq1</span><span class="special">&</span> <span class="identifier">seq1</span><span class="special">,</span> <span class="identifier">Seq2</span><span class="special">&</span> <span class="identifier">seq2</span><span class="special">);</span>
</pre>
<h6>
<a name="fusion.sequence.intrinsic.functions.swap.h2"></a>
<span><a name="fusion.sequence.intrinsic.functions.swap.parameters"></a></span><a class="link" href="swap.html#fusion.sequence.intrinsic.functions.swap.parameters">Parameters</a>
</h6>
<div class="informaltable"><table class="table">
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Parameters
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Requirement
</p>
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<th>
<p>
Description
</p>
</th>
</tr></thead>
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<td>
<p>
<code class="computeroutput"><span class="identifier">seq1</span></code>, <code class="computeroutput"><span class="identifier">seq2</span></code>
</p>
</td>
<td>
<p>
Models of <a class="link" href="../../concepts/forward_sequence.html" title="Forward Sequence">Forward
Sequence</a>
</p>
</td>
<td>
<p>
The sequences whos elements we wish to swap.
</p>
</td>
</tr></tbody>
</table></div>
<h6>
<a name="fusion.sequence.intrinsic.functions.swap.h3"></a>
<span><a name="fusion.sequence.intrinsic.functions.swap.expression_semantics"></a></span><a class="link" href="swap.html#fusion.sequence.intrinsic.functions.swap.expression_semantics">Expression
Semantics</a>
</h6>
<pre class="programlisting"><span class="identifier">swap</span><span class="special">(</span><span class="identifier">seq1</span><span class="special">,</span> <span class="identifier">seq2</span><span class="special">);</span>
</pre>
<p>
<span class="bold"><strong>Return type</strong></span>: <code class="computeroutput"><span class="keyword">void</span></code>
</p>
<p>
<span class="bold"><strong>Precondition</strong></span>: <code class="computeroutput"><a class="link" href="size.html" title="size"><code class="computeroutput"><span class="identifier">size</span></code></a><span class="special">(</span><span class="identifier">seq1</span><span class="special">)</span> <span class="special">==</span> <a class="link" href="size.html" title="size"><code class="computeroutput"><span class="identifier">size</span></code></a><span class="special">(</span><span class="identifier">seq2</span><span class="special">)</span></code>
</p>
<p>
<span class="bold"><strong>Semantics</strong></span>: Calls <code class="computeroutput"><span class="identifier">swap</span><span class="special">(</span><span class="identifier">a1</span><span class="special">,</span> <span class="identifier">b1</span><span class="special">)</span></code> for corresponding elements in <code class="computeroutput"><span class="identifier">seq1</span></code> and <code class="computeroutput"><span class="identifier">seq2</span></code>.
</p>
<p>
/sequence/intrinsic/swap.hpp>
</p>
<h6>
<a name="fusion.sequence.intrinsic.functions.swap.h4"></a>
<span><a name="fusion.sequence.intrinsic.functions.swap.example"></a></span><a class="link" href="swap.html#fusion.sequence.intrinsic.functions.swap.example">Example</a>
</h6>
<pre class="programlisting"><a class="link" href="../../../container/vector.html" title="vector"><code class="computeroutput"><span class="identifier">vector</span></code></a><span class="special"><</span><span class="keyword">int</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">></span> <span class="identifier">v1</span><span class="special">(</span><span class="number">1</span><span class="special">,</span> <span class="string">"hello"</span><span class="special">),</span> <span class="identifier">v2</span><span class="special">(</span><span class="number">2</span><span class="special">,</span> <span class="string">"world"</span><span class="special">);</span>
<span class="identifier">swap</span><span class="special">(</span><span class="identifier">v1</span><span class="special">,</span> <span class="identifier">v2</span><span class="special">);</span>
<span class="identifier">assert</span><span class="special">(</span><span class="identifier">v1</span> <span class="special">==</span> <a class="link" href="../../../container/generation/functions/make_vector.html" title="make_vector"><code class="computeroutput"><span class="identifier">make_vector</span></code></a><span class="special">(</span><span class="number">2</span><span class="special">,</span> <span class="string">"world"</span><span class="special">));</span>
<span class="identifier">assert</span><span class="special">(</span><span class="identifier">v2</span> <span class="special">==</span> <a class="link" href="../../../container/generation/functions/make_vector.html" title="make_vector"><code class="computeroutput"><span class="identifier">make_vector</span></code></a><span class="special">(</span><span class="number">1</span><span class="special">,</span> <span class="string">"hello"</span><span class="special">));</span>
</pre>
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