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- <title>The MPL Reference Manual: transform_view</title>
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- <div class="section" id="transform-view">
- <h1><a class="toc-backref" href="./views.html#id1422">transform_view</a></h1>
- <div class="section" id="id159">
- <h3><a class="subsection-title" href="#synopsis" name="synopsis">Synopsis</a></h3>
- <pre class="literal-block">
- template<
- typename Sequence
- , typename F
- >
- struct <a href="./transform-view.html" class="identifier">transform_view</a>
- {
- // <em>unspecified</em>
- // <em>...</em>
- };
- </pre>
- </div>
- <div class="section" id="id160">
- <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="id161">
- <h3><a class="subsection-title" href="#header" name="header">Header</a></h3>
- <pre class="literal-block">
- #include <<a href="../../../../boost/mpl/transform_view.hpp" class="header">boost/mpl/transform_view.hpp</a>>
- </pre>
- </div>
- <div class="section" id="id162">
- <h3><a class="subsection-title" href="#model-of" name="model-of">Model of</a></h3>
- <ul class="simple">
- <li><a class="reference internal" href="./forward-sequence.html">Forward Sequence</a></li>
- </ul>
- </div>
- <div class="section" id="id163">
- <h3><a class="subsection-title" href="#parameters" name="parameters">Parameters</a></h3>
- <table border="1" class="docutils table">
- <colgroup>
- <col width="19%" />
- <col width="40%" />
- <col width="40%" />
- </colgroup>
- <thead valign="bottom">
- <tr><th class="head">Parameter</th>
- <th class="head">Requirement</th>
- <th class="head">Description</th>
- </tr>
- </thead>
- <tbody valign="top">
- <tr><td><tt class="literal"><span class="pre">Sequence</span></tt></td>
- <td><a class="reference internal" 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 internal" href="./lambda-expression.html">Lambda Expression</a></td>
- <td>A transformation.</td>
- </tr>
- </tbody>
- </table>
- </div>
- <div class="section" id="id164">
- <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="./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 internal" href="./forward-sequence.html">Forward Sequence</a>, and <tt class="literal"><span class="pre">f</span></tt> is an unary <a class="reference internal" href="./lambda-expression.html">Lambda Expression</a>.</p>
- <table border="1" class="docutils table">
- <colgroup>
- <col width="37%" />
- <col width="63%" />
- </colgroup>
- <thead valign="bottom">
- <tr><th class="head">Expression</th>
- <th class="head">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><s,f>
- <a href="./transform-view.html" class="identifier">transform_view</a><s,f>::type
- </pre>
- </td>
- <td>A lazy <a class="reference internal" 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><v>::type</span></tt>, <tt class="literal"><span class="pre"><a href="./end.html" class="identifier">end</a><v>::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><s>::type</span></tt>, <tt class="literal"><span class="pre"><a href="./end.html" class="identifier">end</a><s>::type</span></tt>) <tt class="literal"><span class="pre"><a href="./deref.html" class="identifier">deref</a><i>::type</span></tt> is identical to
- <tt class="literal"><span class="pre"><a href="./apply.html" class="identifier">apply</a><</span> <span class="pre">f,</span> <span class="pre"><a href="./deref.html" class="identifier">deref</a><j>::type</span> <span class="pre">>::type</span></tt>.</td>
- </tr>
- <tr><td><tt class="literal"><span class="pre"><a href="./size.html" class="identifier">size</a><v>::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><v>::value</span> <span class="pre">==</span> <span class="pre"><a href="./size.html" class="identifier">size</a><s>::value</span></tt>;
- linear complexity; see <a class="reference internal" href="./forward-sequence.html">Forward Sequence</a>.</td>
- </tr>
- </tbody>
- </table>
- </div>
- <div class="section" id="id165">
- <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><int,long,char,char[50],double> types;
- typedef <a href="./max-element.html" class="identifier">max_element</a><
- <a href="./transform-view.html" class="identifier">transform_view</a>< types, size_of<_> >
- >::type iter;
- <a href="./assert-relation.html" class="identifier">BOOST_MPL_ASSERT_RELATION</a>( <a href="./deref.html" class="identifier">deref</a><iter>::type::value, ==, 50 );
- </pre>
- </div>
- <div class="section" id="id166">
- <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="./filter-view.html">filter_view</a>, <a class="reference internal" href="./joint-view.html">joint_view</a>, <a class="reference internal" href="./zip-view.html">zip_view</a>, <a class="reference internal" href="./iterator-range.html">iterator_range</a></p>
- <!-- Sequences/Views//zip_view -->
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