boost_fusion/doc/html/fusion/sequences/views/zip_view.html

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<div class="titlepage"><div><div><h4 class="title">
<a name="fusion.sequences.views.zip_view"></a><a href="zip_view.html" title="zip_view">zip_view</a></h4></div></div></div>
<a name="fusion.sequences.views.zip_view.description"></a><h5>
<a name="id996786"></a>
          <a href="zip_view.html#fusion.sequences.views.zip_view.description">Description</a>
        </h5>
<p>
          <code class="computeroutput"><span class="identifier">zip_view</span></code> presents a view
          which iterates over a collection of <span class="underline">_sequence</span>_s
          in parallel. A <code class="computeroutput"><span class="identifier">zip_view</span></code>
          is constructed from a <a href="../../sequences.html" title="Sequences">Sequence</a>
          of references to the component <span class="underline">_sequence</span>_s.
        </p>
<a name="fusion.sequences.views.zip_view.header"></a><h5>
<a name="id996851"></a>
          <a href="zip_view.html#fusion.sequences.views.zip_view.header">Header</a>
        </h5>
<pre class="programlisting">
<span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">fusion</span><span class="special">/</span><span class="identifier">sequence</span><span class="special">/</span><span class="identifier">view</span><span class="special">/</span><span class="identifier">zip_view</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
</pre>
<a name="fusion.sequences.views.zip_view.synopsis"></a><h5>
<a name="id996942"></a>
          <a href="zip_view.html#fusion.sequences.views.zip_view.synopsis">Synopsis</a>
        </h5>
<pre class="programlisting">
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Sequences</span><span class="special">&gt;</span>
<span class="keyword">struct</span> <span class="identifier">zip_view</span><span class="special">;</span>
</pre>
<a name="fusion.sequences.views.zip_view.template_parameters"></a><h5>
<a name="id997012"></a>
          <a href="zip_view.html#fusion.sequences.views.zip_view.template_parameters">Template
          parameters</a>
        </h5>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
<col>
</colgroup>
<thead><tr>
<th>Parameter</th>
<th>Description</th>
<th>Default</th>
</tr></thead>
<tbody><tr>
<td><code class="computeroutput"><span class="identifier">Sequences</span></code></td>
<td>A
                <a href="../concepts/forward_sequence.html" title="Forward
        Sequence">Forward
                Sequence</a> of references to other Fusion <span class="underline">_sequence</span>_s</td>
<td> </td>
</tr></tbody>
</table></div>
<a name="fusion.sequences.views.zip_view.model_of"></a><h5>
<a name="id997095"></a>
          <a href="zip_view.html#fusion.sequences.views.zip_view.model_of">Model of</a>
        </h5>
<div class="itemizedlist"><ul type="disc"><li><a href="../concepts/forward_sequence.html" title="Forward
        Sequence">Forward Sequence</a></li></ul></div>
<div class="variablelist">
<p class="title"><b>Notation</b></p>
<dl>
<dt><span class="term"><code class="computeroutput"><span class="identifier">ZV</span></code></span></dt>
<dd>
            A <code class="computeroutput"><span class="identifier">joint_view</span></code> type
          </dd>
<dt><span class="term"><code class="computeroutput"><span class="identifier">s</span></code></span></dt>
<dd>
            An instance of <code class="computeroutput"><span class="identifier">Sequences</span></code>
</dd>
<dt><span class="term"><code class="computeroutput"><span class="identifier">zv1</span></code>,
          <code class="computeroutput"><span class="identifier">zv2</span></code></span></dt>
<dd>
            Instances of <code class="computeroutput"><span class="identifier">ZV</span></code>
</dd>
</dl>
</div>
<a name="fusion.sequences.views.zip_view.expression_semantics"></a><h5>
<a name="id997220"></a>
          <a href="zip_view.html#fusion.sequences.views.zip_view.expression_semantics">Expression
          Semantics</a>
        </h5>
<p>
          Semantics of an expression is defined only where it differs from, or is
          not defined in <a href="../concepts/forward_sequence.html" title="Forward
        Sequence">Forward
          Sequence</a>.
        </p>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
</colgroup>
<thead><tr>
<th>Expression</th>
<th>Semantics</th>
</tr></thead>
<tbody>
<tr>
<td><code class="computeroutput"><span class="identifier">ZV</span><span class="special">(</span><span class="identifier">s</span><span class="special">)</span></code></td>
<td>Creates
                a <code class="computeroutput"><span class="identifier">zip_view</span></code> given
                a sequence of references to the component <span class="underline">_sequence</span>_s.</td>
</tr>
<tr>
<td><code class="computeroutput"><span class="identifier">ZV</span><span class="special">(</span><span class="identifier">zv1</span><span class="special">)</span></code></td>
<td>Copy
                constructs a <code class="computeroutput"><span class="identifier">zip_view</span></code>
                from another <code class="computeroutput"><span class="identifier">zip_view</span></code>,
                <code class="computeroutput"><span class="identifier">zv</span></code>.</td>
</tr>
<tr>
<td><code class="computeroutput"><span class="identifier">zv1</span> <span class="special">=</span>
                <span class="identifier">zv2</span></code></td>
<td>Assigns
                to a <code class="computeroutput"><span class="identifier">zip_view</span></code>, <code class="computeroutput"><span class="identifier">zv</span></code>, from another <code class="computeroutput"><span class="identifier">zip_view</span></code>, <code class="computeroutput"><span class="identifier">zv2</span></code>.</td>
</tr>
</tbody>
</table></div>
<a name="fusion.sequences.views.zip_view.example"></a><h5>
<a name="id997444"></a>
          <a href="zip_view.html#fusion.sequences.views.zip_view.example">Example</a>
        </h5>
<pre class="programlisting">
<span class="keyword">typedef</span> <a href="../containers/vector.html" title="vector"><code class="computeroutput"><span class="identifier">vector</span></code></a><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span><span class="keyword">int</span><span class="special">&gt;</span> <span class="identifier">vec1</span><span class="special">;</span>
<span class="keyword">typedef</span> <a href="../containers/vector.html" title="vector"><code class="computeroutput"><span class="identifier">vector</span></code></a><span class="special">&lt;</span><span class="keyword">char</span><span class="special">,</span><span class="keyword">char</span><span class="special">&gt;</span> <span class="identifier">vec2</span><span class="special">;</span>
<span class="identifier">vec1</span> <span class="identifier">v1</span><span class="special">(</span><span class="number">1</span><span class="special">,</span><span class="number">2</span><span class="special">);</span>
<span class="identifier">vec2</span> <span class="identifier">v2</span><span class="special">(</span><span class="char">'a'</span><span class="special">,</span><span class="char">'b'</span><span class="special">);</span>
<span class="keyword">typedef</span> <a href="../containers/vector.html" title="vector"><code class="computeroutput"><span class="identifier">vector</span></code></a><span class="special">&lt;</span><span class="identifier">vec1</span><span class="special">&amp;,</span> <span class="identifier">vec2</span><span class="special">&amp;&gt;</span> <span class="identifier">sequences</span><span class="special">;</span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="identifier">zip_view</span><span class="special">&lt;</span><span class="identifier">sequences</span><span class="special">&gt;(</span><span class="identifier">sequences</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="special">&lt;&lt;</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span> <span class="comment">// ((1 a) (2 b))
</span></pre>
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