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<title>Concept EqualityComparable</title>
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<a name="EqualityComparable"></a><div class="titlepage"></div>
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<h2><span class="refentrytitle">Concept EqualityComparable</span></h2>
<p>EqualityComparable</p>
</div>
<div class="refsect1">
<a name="idm45853365295312"></a><h2>Description</h2>
<p>Equality Comparable types must have <code class="computeroutput">==</code> and
  <code class="computeroutput">!=</code> operators.</p>
</div>
<div class="refsect1">
<a name="idm45853365293424"></a><h2>Notation</h2>
<div class="variablelist"><dl class="variablelist">
<dt><span class="term">X</span></dt>
<dd>A type playing the role of comparable-type in the <a class="link" href="EqualityComparable.html" title="Concept EqualityComparable">EqualityComparable</a> concept.</dd>
<dt>
<span class="term"><code class="varname">x</code>, </span><span class="term"><code class="varname">y</code></span>
</dt>
<dd>Objects of type X</dd>
</dl></div>
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<div class="refsect1">
<a name="idm45853365290240"></a><h2>Valid expressions</h2>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
<col>
</colgroup>
<thead><tr>
<th>Name</th>
<th>Expression</th>
<th>Type</th>
</tr></thead>
<tbody>
<tr>
<td><p>Equality test</p></td>
<td><p>x == y</p></td>
<td><p>Convertible to <span class="type">bool</span></p></td>
</tr>
<tr>
<td><p>Inequality test</p></td>
<td><p>x != y</p></td>
<td><p>Convertible to <span class="type">bool</span></p></td>
</tr>
</tbody>
</table></div>
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<div class="refsect1">
<a name="idm45853365285136"></a><h2>Models</h2>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem"><span class="simplelist"><span class="type">int</span></span></li>
<li class="listitem"><span class="simplelist"><span class="type">std::vector&lt;int&gt;</span></span></li>
</ul></div>
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<td align="right"><div class="copyright-footer">Copyright &#169; 2001, 2002 Indiana University<br>Copyright &#169; 2000, 2001 University of Notre Dame du Lac<br>Copyright &#169; 2000 Jeremy Siek, Lie-Quan Lee, Andrew Lumsdaine<br>Copyright &#169; 1996-1999 Silicon Graphics Computer Systems, Inc.<br>Copyright &#169; 1994 Hewlett-Packard Company<p>Distributed under the Boost Software License, Version 1.0.
      (See accompanying file <code class="filename">LICENSE_1_0.txt</code> or copy at 
      <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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<p>Some concepts based on versions from the MTL draft manual
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