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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< |
| typename T |
| > |
| 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 <<a href="../../../../boost/mpl/single_view.hpp" class="header">boost/mpl/single_view.hpp</a>> |
| </pre> |
| </div> |
| <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> |
| </div> |
| <div class="section" id="id155"> |
| <h3><a class="subsection-title" href="#parameters" name="parameters">Parameters</a></h3> |
| <table border="1" class="docutils table"> |
| <colgroup> |
| <col width="19%" /> |
| <col width="23%" /> |
| <col width="58%" /> |
| </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">T</span></tt></td> |
| <td>Any type</td> |
| <td>The type to be wrapped in a sequence.</td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| <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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| <colgroup> |
| <col width="34%" /> |
| <col width="66%" /> |
| </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="./single-view.html" class="identifier">single_view</a><x> |
| <a href="./single-view.html" class="identifier">single_view</a><x>::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><v>::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><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">1</span></tt>; |
| see <a class="reference internal" href="./random-access-sequence.html">Random Access Sequence</a>.</td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| <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><int> view; |
| typedef <a href="./begin.html" class="identifier">begin</a><view>::type first; |
| typedef <a href="./end.html" class="identifier">end</a><view>::type last; |
| |
| <a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( is_same< <a href="./deref.html" class="identifier">deref</a><first>::type,int > )); |
| <a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( is_same< <a href="./next.html" class="identifier">next</a><first>::type,last > )); |
| <a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( is_same< <a href="./prior.html" class="identifier">prior</a><last>::type,first > )); |
| |
| <a href="./assert-relation.html" class="identifier">BOOST_MPL_ASSERT_RELATION</a>( <a href="./size.html" class="identifier">size</a><view>::value, ==, 1 ); |
| </pre> |
| </div> |
| <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> |
| <!-- Sequences/Views//transform_view --> |
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