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51 lines
1.8 KiB
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51 lines
1.8 KiB
HTML
<!doctype html public "-//ietf//dtd html//en">
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<html><head><title>boost::mpl::not_</title>
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<link rel="stylesheet" href="../mpl_wiki.css">
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</head><body bgcolor="white">
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<h1><a href="../Table_of_Contents.html"><img src="../mpl_logo.jpg" alt="[Home]" border=0 align="right"></a>not_</h1><h3>Synopsis</h3>
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<p>
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<pre>
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template<
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typename F
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>
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struct not_
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{
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typedef <em>unspecified</em> type;
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};
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</pre>
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<p>
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<h3>Description</h3>
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<p>
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Returns the result of <em>logical not</em> (<code>!</code>) operation on its argument.
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<p>
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<h3>Definition</h3>
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<p>
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<pre>
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#include "<a href="../../../../../boost/mpl/not.hpp">boost/mpl/not.hpp</a>"
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</pre>
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<p>
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<h3>Parameters</h3>
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<table border="1">
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<tr><th> Parameter </th><th> Requirement </th><th> Description </th></tr>
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<tr><td><code>F</code></td><td>A model of nullary <a href="../Metafunction.html">Metafunction</a></td><td></td></tr>
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</table>
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<p>
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<h3>Expression semantics</h3>
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<p>
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<table border="1">
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<tr><th> Expression </th><th> Expression type </th><th> Precondition </th><th> Semantics </th><th> Postcondition </th></tr>
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<tr><td><code>not_<f></code></td><td>A model of <code>bool</code> <a href="../Integral_Constant.html">Integral Constant</a></td><td></td><td>Equivalent to <code>bool_<(!f::type::value)></code></td><td></td></tr>
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</table>
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<p>
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<h3>Example</h3>
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<p>
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<pre>
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BOOST_STATIC_ASSERT(not_<true_>::value == false);
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BOOST_STATIC_ASSERT(not_<false_>::value == true);
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</pre>
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<p>
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<h3>See also</h3>
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<p>
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<a href="../Metafunctions.html">Metafunctions</a>, <code><a href="../Reference/and.html">and_</a></code>, <code><a href="../Reference/or.html">or_</a></code>
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<p><hr>
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<a href="../Table_of_Contents.html">Table of Contents</a><br>Last edited September 6, 2003 3:09 am</body></html> |