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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="./intrinsic-metafunctions.html" class="navigation-link">Intrinsic Metafunctions</a> / <a href="./is-sequence.html" class="navigation-link">is_sequence</a></td> |
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| <div class="section" id="is-sequence"> |
| <h1><a class="toc-backref" href="./intrinsic-metafunctions.html#id1438">is_sequence</a></h1> |
| <div class="section" id="id292"> |
| <h3><a class="subsection-title" href="#synopsis" name="synopsis">Synopsis</a></h3> |
| <pre class="literal-block"> |
| template< |
| typename X |
| > |
| struct <a href="./is-sequence.html" class="identifier">is_sequence</a> |
| { |
| typedef <em>unspecified</em> type; |
| }; |
| </pre> |
| </div> |
| <div class="section" id="id293"> |
| <h3><a class="subsection-title" href="#description" name="description">Description</a></h3> |
| <p>Returns a boolean <a class="reference internal" href="./integral-constant.html">Integral Constant</a> <tt class="literal"><span class="pre">c</span></tt> such that <tt class="literal"><span class="pre">c::value</span> <span class="pre">==</span> <span class="pre">true</span></tt> if and |
| only if <tt class="literal"><span class="pre">X</span></tt> is a model of <a class="reference internal" href="./forward-sequence.html">Forward Sequence</a>.</p> |
| </div> |
| <div class="section" id="id294"> |
| <h3><a class="subsection-title" href="#header" name="header">Header</a></h3> |
| <pre class="literal-block"> |
| #include <<a href="../../../../boost/mpl/is_sequence.hpp" class="header">boost/mpl/is_sequence.hpp</a>> |
| </pre> |
| </div> |
| <div class="section" id="id295"> |
| <h3><a class="subsection-title" href="#parameters" name="parameters">Parameters</a></h3> |
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| <col width="58%" /> |
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| <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">X</span></tt></td> |
| <td>Any type</td> |
| <td>The type to query.</td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| <div class="section" id="id296"> |
| <h3><a class="subsection-title" href="#expression-semantics" name="expression-semantics">Expression semantics</a></h3> |
| <pre class="literal-block"> |
| typedef <a href="./is-sequence.html" class="identifier">is_sequence</a><X>::type c; |
| </pre> |
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| <col class="field-name" /> |
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| <tbody valign="top"> |
| <tr class="field"><th class="field-name">Return type:</th><td class="field-body"><p class="first">Boolean <a class="reference internal" href="./integral-constant.html">Integral Constant</a>.</p> |
| </td> |
| </tr> |
| <tr class="field"><th class="field-name">Semantics:</th><td class="field-body"><p class="first">Equivalent to</p> |
| <pre class="last literal-block"> |
| typedef <a href="./not.html" class="identifier">not_</a>< is_same< <a href="./begin.html" class="identifier">begin</a><T>::type,<a href="./void.html" class="identifier">void_</a> > >::type c; |
| </pre> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| <div class="section" id="id297"> |
| <h3><a class="subsection-title" href="#complexity" name="complexity">Complexity</a></h3> |
| <p>Amortized constant time.</p> |
| </div> |
| <div class="section" id="id298"> |
| <h3><a class="subsection-title" href="#example" name="example">Example</a></h3> |
| <pre class="literal-block"> |
| struct UDT {}; |
| |
| <a href="./assert-not.html" class="identifier">BOOST_MPL_ASSERT_NOT</a>(( <a href="./is-sequence.html" class="identifier">is_sequence</a>< std::<a href="./vector.html" class="identifier">vector</a><int> > )); |
| <a href="./assert-not.html" class="identifier">BOOST_MPL_ASSERT_NOT</a>(( <a href="./is-sequence.html" class="identifier">is_sequence</a>< int > )); |
| <a href="./assert-not.html" class="identifier">BOOST_MPL_ASSERT_NOT</a>(( <a href="./is-sequence.html" class="identifier">is_sequence</a>< int& > )); |
| <a href="./assert-not.html" class="identifier">BOOST_MPL_ASSERT_NOT</a>(( <a href="./is-sequence.html" class="identifier">is_sequence</a>< UDT > )); |
| <a href="./assert-not.html" class="identifier">BOOST_MPL_ASSERT_NOT</a>(( <a href="./is-sequence.html" class="identifier">is_sequence</a>< UDT* > )); |
| <a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( <a href="./is-sequence.html" class="identifier">is_sequence</a>< <a href="./range-c.html" class="identifier">range_c</a><int,0,0> > )); |
| <a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( <a href="./is-sequence.html" class="identifier">is_sequence</a>< <a href="./list.html" class="identifier">list</a><> > )); |
| <a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( <a href="./is-sequence.html" class="identifier">is_sequence</a>< <a href="./list.html" class="identifier">list</a><int> > )); |
| <a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( <a href="./is-sequence.html" class="identifier">is_sequence</a>< <a href="./vector.html" class="identifier">vector</a><> > )); |
| <a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( <a href="./is-sequence.html" class="identifier">is_sequence</a>< <a href="./vector.html" class="identifier">vector</a><int> > )); |
| </pre> |
| </div> |
| <div class="section" id="id299"> |
| <h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3> |
| <p><a class="reference internal" href="./forward-sequence.html">Forward Sequence</a>, <a class="reference internal" href="./begin.html">begin</a>, <a class="reference internal" href="./end.html">end</a>, <a class="reference internal" href="./vector.html">vector</a>, <a class="reference internal" href="./list.html">list</a>, <a class="reference internal" href="./range-c.html">range_c</a></p> |
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