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Regenerating/reorganizing docs [SVN r40832]
2007-11-06 12:13:52 +00:00
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<title>zip_view</title>
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<div class="section" lang="en">
<div class="titlepage"><div><div><h3 class="title">
<a name="fusion.view.zip_view"></a><a href="zip_view.html" title="zip_view">zip_view</a></h3></div></div></div>
<a name="fusion.view.zip_view.description"></a><h4>
<a name="id565793"></a>
<a href="zip_view.html#fusion.view.zip_view.description">Description</a>
</h4>
<p>
<tt class="computeroutput"><span class="identifier">zip_view</span></tt> presents a view
which iterates over a collection of <a href="../sequence.html" title="Sequence">Sequence</a>(s)
in parallel. A <tt class="computeroutput"><span class="identifier">zip_view</span></tt> is
constructed from a <a href="../sequence.html" title="Sequence">Sequence</a> of references
to the component <span class="underline">_sequence</span>_s.
</p>
<a name="fusion.view.zip_view.header"></a><h4>
<a name="id565871"></a>
<a href="zip_view.html#fusion.view.zip_view.header">Header</a>
</h4>
<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">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>
<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">include</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.view.zip_view.synopsis"></a><h4>
<a name="id566028"></a>
<a href="zip_view.html#fusion.view.zip_view.synopsis">Synopsis</a>
</h4>
<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.view.zip_view.template_parameters"></a><h4>
<a name="id566108"></a>
<a href="zip_view.html#fusion.view.zip_view.template_parameters">Template parameters</a>
</h4>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
<col>
</colgroup>
<thead><tr>
<th>
<p>
Parameter
</p>
</th>
<th>
<p>
Description
</p>
</th>
<th>
<p>
Default
</p>
</th>
</tr></thead>
<tbody><tr>
<td>
<p>
<tt class="computeroutput"><span class="identifier">Sequences</span></tt>
</p>
</td>
<td>
<p>
A <a href="../sequence/concepts/forward_sequence.html" title="Forward
Sequence">Forward
Sequence</a> of references to other Fusion <span class="underline">_sequence</span>_s
</p>
</td>
<td>
<p>
</p>
</td>
</tr></tbody>
</table></div>
<a name="fusion.view.zip_view.model_of"></a><h4>
<a name="id566228"></a>
<a href="zip_view.html#fusion.view.zip_view.model_of">Model of</a>
</h4>
<div class="itemizedlist"><ul type="disc"><li>
<a href="../sequence/concepts/forward_sequence.html" title="Forward
Sequence">Forward Sequence</a>,
<a href="../sequence/concepts/bidirectional_sequence.html" title="Bidirectional
Sequence">Bidirectional
Sequence</a> or <a href="../sequence/concepts/random_access_sequence.html" title="Random
Access Sequence">Random
Access Sequence</a> depending on the traversal characteristics (see
<a href="../sequence/concepts.html#fusion.sequence.concepts.traversal">Sequence Traversal Concept</a>)
of its underlying sequence.
</li></ul></div>
<div class="variablelist">
<p class="title"><b>Notation</b></p>
<dl>
<dt><span class="term"><tt class="computeroutput"><span class="identifier">ZV</span></tt></span></dt>
<dd><p>
A <tt class="computeroutput"><span class="identifier">joint_view</span></tt> type
</p></dd>
<dt><span class="term"><tt class="computeroutput"><span class="identifier">s</span></tt></span></dt>
<dd><p>
An instance of <tt class="computeroutput"><span class="identifier">Sequences</span></tt>
</p></dd>
<dt><span class="term"><tt class="computeroutput"><span class="identifier">zv1</span></tt>,
<tt class="computeroutput"><span class="identifier">zv2</span></tt></span></dt>
<dd><p>
Instances of <tt class="computeroutput"><span class="identifier">ZV</span></tt>
</p></dd>
</dl>
</div>
<a name="fusion.view.zip_view.expression_semantics"></a><h4>
<a name="id566424"></a>
<a href="zip_view.html#fusion.view.zip_view.expression_semantics">Expression Semantics</a>
</h4>
<p>
Semantics of an expression is defined only where it differs from, or is not
defined in <a href="../sequence/concepts/forward_sequence.html" title="Forward
Sequence">Forward
Sequence</a>.
</p>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
</colgroup>
<thead><tr>
<th>
<p>
Expression
</p>
</th>
<th>
<p>
Semantics
</p>
</th>
</tr></thead>
<tbody>
<tr>
<td>
<p>
<tt class="computeroutput"><span class="identifier">ZV</span><span class="special">(</span><span class="identifier">s</span><span class="special">)</span></tt>
</p>
</td>
<td>
<p>
Creates a <tt class="computeroutput"><span class="identifier">zip_view</span></tt>
given a sequence of references to the component <span class="underline">_sequence</span>_s.
</p>
</td>
</tr>
<tr>
<td>
<p>
<tt class="computeroutput"><span class="identifier">ZV</span><span class="special">(</span><span class="identifier">zv1</span><span class="special">)</span></tt>
</p>
</td>
<td>
<p>
Copy constructs a <tt class="computeroutput"><span class="identifier">zip_view</span></tt>
from another <tt class="computeroutput"><span class="identifier">zip_view</span></tt>,
<tt class="computeroutput"><span class="identifier">zv</span></tt>.
</p>
</td>
</tr>
<tr>
<td>
<p>
<tt class="computeroutput"><span class="identifier">zv1</span> <span class="special">=</span>
<span class="identifier">zv2</span></tt>
</p>
</td>
<td>
<p>
Assigns to a <tt class="computeroutput"><span class="identifier">zip_view</span></tt>,
<tt class="computeroutput"><span class="identifier">zv</span></tt>, from another
<tt class="computeroutput"><span class="identifier">zip_view</span></tt>, <tt class="computeroutput"><span class="identifier">zv2</span></tt>.
</p>
</td>
</tr>
</tbody>
</table></div>
<a name="fusion.view.zip_view.example"></a><h4>
<a name="id566732"></a>
<a href="zip_view.html#fusion.view.zip_view.example">Example</a>
</h4>
<pre class="programlisting">
<span class="keyword">typedef</span> <a href="../container/vector.html" title="vector"><tt class="computeroutput"><span class="identifier">vector</span></tt></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="../container/vector.html" title="vector"><tt class="computeroutput"><span class="identifier">vector</span></tt></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="../container/vector.html" title="vector"><tt class="computeroutput"><span class="identifier">vector</span></tt></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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<td align="right"><small>Copyright <20> 2001-2007 Joel de Guzman, Dan Marsden, Tobias
Schwinger</small></td>
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