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234 lines
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<link rel="start" href="../../index.html" title="Chapter 1. Fusion 2.0">
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<link rel="up" href="../view.html" title="View">
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<a accesskey="p" href="joint_view.html"><img src="../../../../../../doc/html/images/prev.png" alt="Prev"></a><a accesskey="u" href="../view.html"><img src="../../../../../../doc/html/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/html/images/home.png" alt="Home"></a><a accesskey="n" href="transform_view.html"><img src="../../../../../../doc/html/images/next.png" alt="Next"></a>
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<div class="section" lang="en">
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<div class="titlepage"><div><div><h3 class="title">
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<a name="fusion.view.zip_view"></a><a href="zip_view.html" title="zip_view">zip_view</a></h3></div></div></div>
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<a name="fusion.view.zip_view.description"></a><h4>
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<a name="id568921"></a>
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<a href="zip_view.html#fusion.view.zip_view.description">Description</a>
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</h4>
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<p>
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<tt class="computeroutput"><span class="identifier">zip_view</span></tt> presents a view
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which iterates over a collection of <a href="../sequence.html" title="Sequence">Sequence</a>(s)
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in parallel. A <tt class="computeroutput"><span class="identifier">zip_view</span></tt> is
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constructed from a <a href="../sequence.html" title="Sequence">Sequence</a> of references
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to the component <span class="underline">_sequence</span>_s.
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</p>
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<a name="fusion.view.zip_view.header"></a><h4>
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<a name="id568999"></a>
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<a href="zip_view.html#fusion.view.zip_view.header">Header</a>
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</h4>
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<pre class="programlisting">
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<span class="preprocessor">#include</span> <span class="special"><</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">></span>
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<span class="preprocessor">#include</span> <span class="special"><</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">></span>
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</pre>
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<a name="fusion.view.zip_view.synopsis"></a><h4>
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<a name="id569157"></a>
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<a href="zip_view.html#fusion.view.zip_view.synopsis">Synopsis</a>
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</h4>
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<pre class="programlisting">
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<span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">Sequences</span><span class="special">></span>
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<span class="keyword">struct</span> <span class="identifier">zip_view</span><span class="special">;</span>
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</pre>
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<a name="fusion.view.zip_view.template_parameters"></a><h4>
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<a name="id569236"></a>
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<a href="zip_view.html#fusion.view.zip_view.template_parameters">Template parameters</a>
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</h4>
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<div class="informaltable"><table class="table">
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<colgroup>
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<col>
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<col>
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<col>
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</colgroup>
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<thead><tr>
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<th>
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<p>
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Parameter
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</p>
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</th>
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<th>
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<p>
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Description
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</p>
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</th>
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<th>
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<p>
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Default
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</p>
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</th>
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</tr></thead>
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<tbody><tr>
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<td>
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<p>
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<tt class="computeroutput"><span class="identifier">Sequences</span></tt>
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</p>
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</td>
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<td>
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<p>
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A <a href="../sequence/concepts/forward_sequence.html" title="Forward
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Sequence">Forward
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Sequence</a> of references to other Fusion <span class="underline">_sequence</span>_s
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</p>
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</td>
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<td>
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<p>
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</p>
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</td>
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</tr></tbody>
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</table></div>
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<a name="fusion.view.zip_view.model_of"></a><h4>
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<a name="id569356"></a>
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<a href="zip_view.html#fusion.view.zip_view.model_of">Model of</a>
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</h4>
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<div class="itemizedlist"><ul type="disc"><li>
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<a href="../sequence/concepts/forward_sequence.html" title="Forward
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Sequence">Forward Sequence</a>,
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<a href="../sequence/concepts/bidirectional_sequence.html" title="Bidirectional
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Sequence">Bidirectional
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Sequence</a> or <a href="../sequence/concepts/random_access_sequence.html" title="Random
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Access Sequence">Random
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Access Sequence</a> depending on the traversal characteristics (see
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<a href="../sequence/concepts.html#fusion.sequence.concepts.traversal">Sequence Traversal Concept</a>)
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of its underlying sequence.
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</li></ul></div>
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<div class="variablelist">
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<p class="title"><b>Notation</b></p>
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<dl>
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<dt><span class="term"><tt class="computeroutput"><span class="identifier">ZV</span></tt></span></dt>
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<dd><p>
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A <tt class="computeroutput"><span class="identifier">joint_view</span></tt> type
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</p></dd>
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<dt><span class="term"><tt class="computeroutput"><span class="identifier">s</span></tt></span></dt>
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<dd><p>
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An instance of <tt class="computeroutput"><span class="identifier">Sequences</span></tt>
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</p></dd>
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<dt><span class="term"><tt class="computeroutput"><span class="identifier">zv1</span></tt>,
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<tt class="computeroutput"><span class="identifier">zv2</span></tt></span></dt>
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<dd><p>
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Instances of <tt class="computeroutput"><span class="identifier">ZV</span></tt>
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</p></dd>
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</dl>
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</div>
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<a name="fusion.view.zip_view.expression_semantics"></a><h4>
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<a name="id569552"></a>
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<a href="zip_view.html#fusion.view.zip_view.expression_semantics">Expression Semantics</a>
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</h4>
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<p>
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Semantics of an expression is defined only where it differs from, or is not
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defined in <a href="../sequence/concepts/forward_sequence.html" title="Forward
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Sequence">Forward
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Sequence</a>.
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</p>
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<div class="informaltable"><table class="table">
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<colgroup>
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<col>
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<col>
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</colgroup>
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<thead><tr>
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<th>
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<p>
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Expression
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</p>
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</th>
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<th>
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<p>
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Semantics
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</p>
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</th>
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</tr></thead>
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<tbody>
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<tr>
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<td>
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<p>
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<tt class="computeroutput"><span class="identifier">ZV</span><span class="special">(</span><span class="identifier">s</span><span class="special">)</span></tt>
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</p>
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</td>
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<td>
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<p>
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Creates a <tt class="computeroutput"><span class="identifier">zip_view</span></tt>
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given a sequence of references to the component <span class="underline">_sequence</span>_s.
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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<tt class="computeroutput"><span class="identifier">ZV</span><span class="special">(</span><span class="identifier">zv1</span><span class="special">)</span></tt>
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</p>
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</td>
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<td>
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<p>
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Copy constructs a <tt class="computeroutput"><span class="identifier">zip_view</span></tt>
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from another <tt class="computeroutput"><span class="identifier">zip_view</span></tt>,
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<tt class="computeroutput"><span class="identifier">zv</span></tt>.
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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<tt class="computeroutput"><span class="identifier">zv1</span> <span class="special">=</span>
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<span class="identifier">zv2</span></tt>
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</p>
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</td>
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<td>
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<p>
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Assigns to a <tt class="computeroutput"><span class="identifier">zip_view</span></tt>,
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<tt class="computeroutput"><span class="identifier">zv</span></tt>, from another
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<tt class="computeroutput"><span class="identifier">zip_view</span></tt>, <tt class="computeroutput"><span class="identifier">zv2</span></tt>.
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</p>
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</td>
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</tr>
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</tbody>
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</table></div>
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<a name="fusion.view.zip_view.example"></a><h4>
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<a name="id569861"></a>
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<a href="zip_view.html#fusion.view.zip_view.example">Example</a>
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</h4>
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<pre class="programlisting">
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<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"><</span><span class="keyword">int</span><span class="special">,</span><span class="keyword">int</span><span class="special">></span> <span class="identifier">vec1</span><span class="special">;</span>
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<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"><</span><span class="keyword">char</span><span class="special">,</span><span class="keyword">char</span><span class="special">></span> <span class="identifier">vec2</span><span class="special">;</span>
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<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>
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<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>
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<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"><</span><span class="identifier">vec1</span><span class="special">&,</span> <span class="identifier">vec2</span><span class="special">&></span> <span class="identifier">sequences</span><span class="special">;</span>
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<span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="identifier">zip_view</span><span class="special"><</span><span class="identifier">sequences</span><span class="special">>(</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"><<</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))
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</span></pre>
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</div>
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<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
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<td align="left"></td>
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<td align="right"><div class="copyright-footer">Copyright © 2001-2007 Joel de Guzman, Dan Marsden, Tobias
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Schwinger<p>
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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</p>
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