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<td class="header-group page-location"><a href="../refmanual.html" class="navigation-link">Front Page</a> / <a href="./sequences.html" class="navigation-link">Sequences</a> / <a href="./views.html" class="navigation-link">Views</a> / <a href="./single-view.html" class="navigation-link">single_view</a></td>
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<div class="section" id="single-view">
<h1><a class="toc-backref" href="./views.html#id1421">single_view</a></h1>
<div class="section" id="id151">
<h3><a class="subsection-title" href="#synopsis" name="synopsis">Synopsis</a></h3>
<pre class="literal-block">
template&lt;
      typename T
    &gt;
struct <a href="./single-view.html" class="identifier">single_view</a>
{
    // <em>unspecified</em>
    // <em>...</em>
};
</pre>
</div>
<div class="section" id="id152">
<h3><a class="subsection-title" href="#description" name="description">Description</a></h3>
<p>A view onto an arbitrary type <tt class="literal"><span class="pre">T</span></tt> as on a single-element sequence.</p>
</div>
<div class="section" id="id153">
<h3><a class="subsection-title" href="#header" name="header">Header</a></h3>
<pre class="literal-block">
#include &lt;<a href="../../../../boost/mpl/single_view.hpp" class="header">boost/mpl/single_view.hpp</a>&gt;
</pre>
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<div class="section" id="id154">
<h3><a class="subsection-title" href="#model-of" name="model-of">Model of</a></h3>
<ul class="simple">
<li><a class="reference internal" href="./random-access-sequence.html">Random Access Sequence</a></li>
</ul>
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<div class="section" id="id155">
<h3><a class="subsection-title" href="#parameters" name="parameters">Parameters</a></h3>
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<tr><th class="head">Parameter</th>
<th class="head">Requirement</th>
<th class="head">Description</th>
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<tr><td><tt class="literal"><span class="pre">T</span></tt></td>
<td>Any type</td>
<td>The type to be wrapped in a sequence.</td>
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</tbody>
</table>
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<div class="section" id="id156">
<h3><a class="subsection-title" href="#expression-semantics" name="expression-semantics">Expression semantics</a></h3>
<p>The semantics of an expression are defined only
where they differ from, or are not defined in <a class="reference internal" href="./random-access-sequence.html">Random Access Sequence</a>.</p>
<p>In the following table, <tt class="literal"><span class="pre">v</span></tt> is an instance of <tt class="literal"><span class="pre"><a href="./single-view.html" class="identifier">single_view</a></span></tt>, <tt class="literal"><span class="pre">x</span></tt> is an arbitrary type.</p>
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<tr><th class="head">Expression</th>
<th class="head">Semantics</th>
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<tr><td><pre class="first last literal-block">
<a href="./single-view.html" class="identifier">single_view</a>&lt;x&gt;
<a href="./single-view.html" class="identifier">single_view</a>&lt;x&gt;::type
</pre>
</td>
<td>A single-element <a class="reference internal" href="./random-access-sequence.html">Random Access Sequence</a> <tt class="literal"><span class="pre">v</span></tt> such that
<tt class="literal"><span class="pre"><a href="./front.html" class="identifier">front</a>&lt;v&gt;::type</span></tt> is identical to <tt class="literal"><span class="pre">x</span></tt>.</td>
</tr>
<tr><td><tt class="literal"><span class="pre"><a href="./size.html" class="identifier">size</a>&lt;v&gt;::type</span></tt></td>
<td>The size of <tt class="literal"><span class="pre">v</span></tt>; <tt class="literal"><span class="pre"><a href="./size.html" class="identifier">size</a>&lt;v&gt;::value</span> <span class="pre">==</span> <span class="pre">1</span></tt>;
see <a class="reference internal" href="./random-access-sequence.html">Random Access Sequence</a>.</td>
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<div class="section" id="id157">
<h3><a class="subsection-title" href="#example" name="example">Example</a></h3>
<pre class="literal-block">
typedef <a href="./single-view.html" class="identifier">single_view</a>&lt;int&gt; view;
typedef <a href="./begin.html" class="identifier">begin</a>&lt;view&gt;::type first;
typedef <a href="./end.html" class="identifier">end</a>&lt;view&gt;::type last;

<a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( is_same&lt; <a href="./deref.html" class="identifier">deref</a>&lt;first&gt;::type,int &gt; ));
<a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( is_same&lt; <a href="./next.html" class="identifier">next</a>&lt;first&gt;::type,last &gt; ));
<a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( is_same&lt; <a href="./prior.html" class="identifier">prior</a>&lt;last&gt;::type,first &gt; ));

<a href="./assert-relation.html" class="identifier">BOOST_MPL_ASSERT_RELATION</a>( <a href="./size.html" class="identifier">size</a>&lt;view&gt;::value, ==, 1 );
</pre>
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<div class="section" id="id158">
<h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3>
<p><a class="reference internal" href="./sequences.html">Sequences</a>, <a class="reference internal" href="./views.html">Views</a>, <a class="reference internal" href="./iterator-range.html">iterator_range</a>, <a class="reference internal" href="./filter-view.html">filter_view</a>, <a class="reference internal" href="./transform-view.html">transform_view</a>, <a class="reference internal" href="./joint-view.html">joint_view</a>, <a class="reference internal" href="./zip-view.html">zip_view</a></p>
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