ceph/src/boost/libs/mpl/doc/refmanual/not.html

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  12 <td class="header-group page-location"><a href="../refmanual.html" class="navigation-link">Front Page</a> / <a href="./metafunctions.html" class="navigation-link">Metafunctions</a> / <a href="./logical-operations.html" class="navigation-link">Logical Operations</a> / <a href="./not.html" class="navigation-link">not_</a></td>
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  14 <div class="section" id="not">
  15 <h1><a class="toc-backref" href="./logical-operations.html#id1552">not_</a></h1>
  16 <div class="section" id="id1082">
  17 <h3><a class="subsection-title" href="#synopsis" name="synopsis">Synopsis</a></h3>
  18 <pre class="literal-block">
  19 template&lt;
  20       typename F
  21     &gt;
  22 struct <a href="./not.html" class="identifier">not_</a>
  23 {
  24     typedef <em>unspecified</em> type;
  25 };
  26 </pre>
  27 </div>
  28 <div class="section" id="id1083">
  29 <h3><a class="subsection-title" href="#description" name="description">Description</a></h3>
  30 <p>Returns the result of <em>logical not</em> (<tt class="literal"><span class="pre">!</span></tt>) operation on its argument.</p>
  31 </div>
  32 <div class="section" id="id1084">
  33 <h3><a class="subsection-title" href="#header" name="header">Header</a></h3>
  34 <pre class="literal-block">
  35 #include &lt;<a href="../../../../boost/mpl/not.hpp" class="header">boost/mpl/not.hpp</a>&gt;
  36 #include &lt;<a href="../../../../boost/mpl/logical.hpp" class="header">boost/mpl/logical.hpp</a>&gt;
  37 </pre>
  38 </div>
  39 <div class="section" id="id1085">
  40 <h3><a class="subsection-title" href="#parameters" name="parameters">Parameters</a></h3>
  41 <table border="1" class="docutils table">
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  43 <col width="17%" />
  44 <col width="30%" />
  45 <col width="53%" />
  46 </colgroup>
  47 <thead valign="bottom">
  48 <tr><th class="head">Parameter</th>
  49 <th class="head">Requirement</th>
  50 <th class="head">Description</th>
  51 </tr>
  52 </thead>
  53 <tbody valign="top">
  54 <tr><td><tt class="literal"><span class="pre">F</span></tt></td>
  55 <td>Nullary <a class="reference internal" href="./metafunction.html">Metafunction</a></td>
  56 <td>Operation's argument.</td>
  57 </tr>
  58 </tbody>
  59 </table>
  60 </div>
  61 <div class="section" id="id1086">
  62 <h3><a class="subsection-title" href="#expression-semantics" name="expression-semantics">Expression semantics</a></h3>
  63 <p>For arbitrary nullary <a class="reference internal" href="./metafunction.html">Metafunction</a> <tt class="literal"><span class="pre">f</span></tt>:</p>
  64 <pre class="literal-block">
  65 typedef <a href="./not.html" class="identifier">not_</a>&lt;f&gt;::type r;
  66 </pre>
  67 <table class="docutils field-list" frame="void" rules="none">
  68 <col class="field-name" />
  69 <col class="field-body" />
  70 <tbody valign="top">
  71 <tr class="field"><th class="field-name">Return type:</th><td class="field-body"><p class="first"><a class="reference internal" href="./integral-constant.html">Integral Constant</a>.</p>
  72 </td>
  73 </tr>
  74 <tr class="field"><th class="field-name">Semantics:</th><td class="field-body"><p class="first">Equivalent to</p>
  75 <pre class="last literal-block">
  76 typedef <a href="./bool.html" class="identifier">bool_</a>&lt; (!f::type::value) &gt; r;
  77 </pre>
  78 </td>
  79 </tr>
  80 </tbody>
  81 </table>
  82 <!-- .......................................................................... -->
  83 <pre class="literal-block">
  84 typedef <a href="./not.html" class="identifier">not_</a>&lt;f&gt; r;
  85 </pre>
  86 <table class="docutils field-list" frame="void" rules="none">
  87 <col class="field-name" />
  88 <col class="field-body" />
  89 <tbody valign="top">
  90 <tr class="field"><th class="field-name">Return type:</th><td class="field-body"><p class="first"><a class="reference internal" href="./integral-constant.html">Integral Constant</a>.</p>
  91 </td>
  92 </tr>
  93 <tr class="field"><th class="field-name">Semantics:</th><td class="field-body"><p class="first">Equivalent to</p>
  94 <pre class="last literal-block">
  95 struct r : <a href="./not.html" class="identifier">not_</a>&lt;f&gt;::type {};
  96 </pre>
  97 </td>
  98 </tr>
  99 </tbody>
 100 </table>
 101 </div>
 102 <div class="section" id="id1087">
 103 <h3><a class="subsection-title" href="#example" name="example">Example</a></h3>
 104 <pre class="literal-block">
 105 <a href="./assert-not.html" class="identifier">BOOST_MPL_ASSERT_NOT</a>(( <a href="./not.html" class="identifier">not_</a>&lt; <a href="./bool.html" class="identifier">true_</a> &gt; ));
 106 <a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( <a href="./not.html" class="identifier">not_</a>&lt; <a href="./bool.html" class="identifier">false_</a> > ));
 107 </pre>
 108 </div>
 109 <div class="section" id="id1088">
 110 <h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3>
 111 <p><a class="reference internal" href="./metafunctions.html">Metafunctions</a>, <a class="reference internal" href="./logical-operations.html">Logical Operations</a>, <a class="reference internal" href="./and.html">and_</a>, <a class="reference internal" href="./or.html">or_</a></p>
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 117 <td><div class="copyright-footer"><div class="copyright">Copyright ©  2001-2009 Aleksey Gurtovoy and David Abrahams</div>
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