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<?xml version="1.0" encoding="utf-8" ?>
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<title>The MPL Reference Manual: transform_view</title>
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<body class="docframe refmanual">
<table class="header"><tr class="header"><td class="header-group navigation-bar"><span class="navigation-group"><a href="./single-view.html" class="navigation-link">Prev</a>&nbsp;<a href="./zip-view.html" class="navigation-link">Next</a></span><span class="navigation-group-separator">&nbsp;|&nbsp;</span><span class="navigation-group"><a href="./single-view.html" class="navigation-link">Back</a>&nbsp;<a href="./zip-view.html" class="navigation-link">Along</a></span><span class="navigation-group-separator">&nbsp;|&nbsp;</span><span class="navigation-group"><a href="./views.html" class="navigation-link">Up</a>&nbsp;<a href="../refmanual.html" class="navigation-link">Home</a></span><span class="navigation-group-separator">&nbsp;|&nbsp;</span><span class="navigation-group"><a href="./refmanual_toc.html" class="navigation-link">Full TOC</a></span></td>
<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="./transform-view.html" class="navigation-link">transform_view</a></td>
</tr></table><div class="header-separator"></div>
<div class="section" id="transform-view">
<h1><a class="toc-backref" href="./views.html#id350" name="transform-view">transform_view</a></h1>
<div class="section" id="transform-synopsis">
<h3><a class="subsection-title" href="#synopsis" name="synopsis">Synopsis</a></h3>
<pre class="literal-block">
template&lt;
typename Sequence
, typename F
&gt;
struct <a href="./transform-view.html" class="identifier">transform_view</a>
{
// <em>unspecified</em>
// <em>...</em>
};
</pre>
</div>
<div class="section" id="transform-description">
<h3><a class="subsection-title" href="#description" name="description">Description</a></h3>
<p>A view the full range of <tt class="literal"><span class="pre">Sequence</span></tt>'s transformed elements.</p>
</div>
<div class="section" id="transform-header">
<h3><a class="subsection-title" href="#header" name="header">Header</a></h3>
<pre class="literal-block">
#include &lt;<a href="../../../../boost/mpl/transform_view.hpp" class="header">boost/mpl/transform_view.hpp</a>&gt;
</pre>
</div>
<div class="section" id="transform-model-of">
<h3><a class="subsection-title" href="#model-of" name="model-of">Model of</a></h3>
<ul class="simple">
<li><a class="reference" href="./forward-sequence.html">Forward Sequence</a></li>
</ul>
</div>
<div class="section" id="transform-parameters">
<h3><a class="subsection-title" href="#parameters" name="parameters">Parameters</a></h3>
<table border="1" class="table">
<colgroup>
<col width="19%" />
<col width="40%" />
<col width="40%" />
</colgroup>
<thead valign="bottom">
<tr><th>Parameter</th>
<th>Requirement</th>
<th>Description</th>
</tr>
</thead>
<tbody valign="top">
<tr><td><tt class="literal"><span class="pre">Sequence</span></tt></td>
<td><a class="reference" href="./forward-sequence.html">Forward Sequence</a></td>
<td>A sequence to wrap.</td>
</tr>
<tr><td><tt class="literal"><span class="pre">F</span></tt></td>
<td>Unary <a class="reference" href="./lambda-expression.html">Lambda Expression</a></td>
<td>A transformation.</td>
</tr>
</tbody>
</table>
</div>
<div class="section" id="transform-expression-semantics">
<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" href="./forward-sequence.html">Forward 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="./transform-view.html" class="identifier">transform_view</a></span></tt>, <tt class="literal"><span class="pre">s</span></tt> is an arbitrary
<a class="reference" href="./forward-sequence.html">Forward Sequence</a>, and <tt class="literal"><span class="pre">f</span></tt> is an unary <a class="reference" href="./lambda-expression.html">Lambda Expression</a>.</p>
<table border="1" class="table">
<colgroup>
<col width="37%" />
<col width="63%" />
</colgroup>
<thead valign="bottom">
<tr><th>Expression</th>
<th>Semantics</th>
</tr>
</thead>
<tbody valign="top">
<tr><td><pre class="first last literal-block">
<a href="./transform-view.html" class="identifier">transform_view</a>&lt;s,f&gt;
<a href="./transform-view.html" class="identifier">transform_view</a>&lt;s,f&gt;::type
</pre>
</td>
<td>A lazy <a class="reference" href="./forward-sequence.html">Forward Sequence</a> such that for each <tt class="literal"><span class="pre">i</span></tt> in the
range [<tt class="literal"><span class="pre"><a href="./begin.html" class="identifier">begin</a>&lt;v&gt;::type</span></tt>, <tt class="literal"><span class="pre"><a href="./end.html" class="identifier">end</a>&lt;v&gt;::type</span></tt>) and each <tt class="literal"><span class="pre">j</span></tt> in for in the range
[<tt class="literal"><span class="pre"><a href="./begin.html" class="identifier">begin</a>&lt;s&gt;::type</span></tt>, <tt class="literal"><span class="pre"><a href="./end.html" class="identifier">end</a>&lt;s&gt;::type</span></tt>) <tt class="literal"><span class="pre"><a href="./deref.html" class="identifier">deref</a>&lt;i&gt;::type</span></tt> is identical to
<tt class="literal"><span class="pre"><a href="./apply.html" class="identifier">apply</a>&lt;</span> <span class="pre">f,</span> <span class="pre"><a href="./deref.html" class="identifier">deref</a>&lt;j&gt;::type</span> <span class="pre">&gt;::type</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"><a href="./size.html" class="identifier">size</a>&lt;s&gt;::value</span></tt>;
linear complexity; see <a class="reference" href="./forward-sequence.html">Forward Sequence</a>.</td>
</tr>
</tbody>
</table>
</div>
<div class="section" id="transform-example">
<h3><a class="subsection-title" href="#example" name="example">Example</a></h3>
<p>Find the largest type in a sequence.</p>
<pre class="literal-block">
typedef <a href="./vector.html" class="identifier">vector</a>&lt;int,long,char,char[50],double&gt; types;
typedef <a href="./max-element.html" class="identifier">max_element</a>&lt;
<a href="./transform-view.html" class="identifier">transform_view</a>&lt; types, size_of&lt;_&gt; &gt;
&gt;::type iter;
<a href="./assert-relation.html" class="identifier">BOOST_MPL_ASSERT_RELATION</a>( <a href="./deref.html" class="identifier">deref</a>&lt;iter&gt;::type::value, ==, 50 );
</pre>
</div>
<div class="section" id="transform-see-also">
<h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3>
<p><a class="reference" href="./sequences.html">Sequences</a>, <a class="reference" href="./views.html">Views</a>, <a class="refentry reference" href="./filter-view.html"><tt class="refentry literal"><span class="pre">filter_view</span></tt></a>, <a class="refentry reference" href="./joint-view.html"><tt class="refentry literal"><span class="pre">joint_view</span></tt></a>, <a class="refentry reference" href="./zip-view.html"><tt class="refentry literal"><span class="pre">zip_view</span></tt></a>, <a class="refentry reference" href="./iterator-range.html"><tt class="refentry literal"><span class="pre">iterator_range</span></tt></a></p>
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