2007-11-06 12:13:52 +00:00
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<title>single_view</title>
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2007-11-07 03:46:23 +00:00
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2007-11-06 12:13:52 +00:00
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<link rel="start" href="../../index.html" title="Chapter<65>1.<2E>Fusion 2.0">
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<link rel="up" href="../view.html" title="View">
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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.single_view"></a><a href="single_view.html" title="single_view">single_view</a></h3></div></div></div>
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<p>
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<tt class="computeroutput"><span class="identifier">single_view</span></tt> is a view into
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a value as a single element sequence.
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</p>
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<a name="fusion.view.single_view.header"></a><h4>
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2007-12-17 09:27:42 +00:00
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<a name="id563420"></a>
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2007-11-06 12:13:52 +00:00
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<a href="single_view.html#fusion.view.single_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">single_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">single_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.single_view.synopsis"></a><h4>
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2007-12-17 09:27:42 +00:00
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<a name="id563577"></a>
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2007-11-06 12:13:52 +00:00
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<a href="single_view.html#fusion.view.single_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">T</span><span class="special">></span>
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<span class="keyword">struct</span> <span class="identifier">single_view</span><span class="special">;</span>
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</pre>
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<a name="fusion.view.single_view.template_parameters"></a><h4>
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2007-12-17 09:27:42 +00:00
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<a name="id563658"></a>
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2007-11-06 12:13:52 +00:00
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<a href="single_view.html#fusion.view.single_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">T</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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Any type
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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.single_view.model_of"></a><h4>
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2007-12-17 09:27:42 +00:00
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<a name="id563762"></a>
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2007-11-06 12:13:52 +00:00
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<a href="single_view.html#fusion.view.single_view.model_of">Model of</a>
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</h4>
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<div class="itemizedlist"><ul type="disc"><li><a href="../sequence/concepts/forward_sequence.html" title="Forward
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Sequence">Forward Sequence</a></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">S</span></tt></span></dt>
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<dd><p>
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A <tt class="computeroutput"><span class="identifier">single_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>,
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<tt class="computeroutput"><span class="identifier">s2</span></tt></span></dt>
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<dd><p>
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Instances of <tt class="computeroutput"><span class="identifier">single_view</span></tt>
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</p></dd>
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<dt><span class="term"><tt class="computeroutput"><span class="identifier">x</span></tt></span></dt>
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<dd><p>
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An instance of <tt class="computeroutput"><span class="identifier">T</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.single_view.expression_semantics"></a><h4>
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2007-12-17 09:27:42 +00:00
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<a name="id563926"></a>
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2007-11-06 12:13:52 +00:00
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<a href="single_view.html#fusion.view.single_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">S</span><span class="special">(</span><span class="identifier">x</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">single_view</span></tt>
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from <tt class="computeroutput"><span class="identifier">x</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">S</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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Copy constructs a <tt class="computeroutput"><span class="identifier">single_view</span></tt>
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from another <tt class="computeroutput"><span class="identifier">single_view</span></tt>,
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<tt class="computeroutput"><span class="identifier">s</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">s</span> <span class="special">=</span>
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<span class="identifier">s2</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">single_view</span></tt>,
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<tt class="computeroutput"><span class="identifier">s</span></tt>, from another
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<tt class="computeroutput"><span class="identifier">single_view</span></tt>, <tt class="computeroutput"><span class="identifier">s2</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.single_view.example"></a><h4>
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2007-12-17 09:27:42 +00:00
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<a name="id564238"></a>
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2007-11-06 12:13:52 +00:00
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<a href="single_view.html#fusion.view.single_view.example">Example</a>
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</h4>
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<pre class="programlisting">
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<span class="identifier">single_view</span><span class="special"><</span><span class="keyword">int</span><span class="special">></span> <span class="identifier">view</span><span class="special">(</span><span class="number">3</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">view</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>
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</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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2007-11-14 10:17:09 +00:00
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<td align="right"><div class="copyright-footer">Copyright <20> 2001-2007 Joel de Guzman, Dan Marsden, Tobias
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2007-11-07 02:12:28 +00:00
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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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2007-11-14 10:17:09 +00:00
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</p>
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</div></td>
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2007-11-06 12:13:52 +00:00
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</tr></table>
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<hr>
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<div class="spirit-nav">
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<a accesskey="p" href="../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="filter_view.html"><img src="../../../../../../doc/html/images/next.png" alt="Next"></a>
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