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<a href="structCGAL_1_1Handle__hash__function-members.html">List of all members</a> </div>
<div class="headertitle"><div class="title">CGAL::Handle_hash_function Struct Reference<div class="ingroups"><a class="el" href="group__MiscellanyRef.html">Profiling Tools, Hash Map, Union-find, Modifiers Reference</a></div></div></div>
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<p><code>#include <CGAL/Handle_hash_function.h></code></p>
<a name="details" id="details"></a><h2 class="groupheader">Definition</h2>
<div class="textblock"><p>The class <code><a class="el" href="structCGAL_1_1Handle__hash__function.html" title="The class Handle_hash_function is a model for the UniqueHashFunction concept.">Handle_hash_function</a></code> is a model for the <code><a class="el" href="classUniqueHashFunction.html" title="UniqueHashFunction is a concept for a hash function with unique hash values. An instance hash for a m...">UniqueHashFunction</a></code> concept. </p>
<p>It is applicable for all key types with pointer-like functionality, such as handles, iterators, and circulators. Specifically, for a <code>key</code> value the expression <code>&*key</code> must return a unique address.</p>
<dl>
<dt>Is model of</dt>
<dd><code><a class="el" href="classUniqueHashFunction.html" title="UniqueHashFunction is a concept for a hash function with unique hash values. An instance hash for a m...">UniqueHashFunction</a></code> </dd>
</dl>
<dl class="section see"><dt>See also</dt><dd><code><a class="el" href="classCGAL_1_1Unique__hash__map.html" title="An instance of the class template Unique_hash_map is an injective mapping from the set of keys of typ...">CGAL::Unique_hash_map</a><Key,Data,<a class="el" href="classUniqueHashFunction.html" title="UniqueHashFunction is a concept for a hash function with unique hash values. An instance hash for a m...">UniqueHashFunction</a>></code></dd></dl>
<p><b>Implementation</b><br>
</p>
<p>Plain type cast of <code>&*key</code> to <code>std::size_t</code> and divided by the size of the <code>std::iterator_traits<<a class="elRef" href="../Circulator/classHandle.html">Handle</a>>::value_type</code> to avoid correlations with the internal table size, which is a power of two. </p>
</div><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader">Creation</h2></td></tr>
<tr class="memitem:affe912c9996eec6a66d6c23fd6fe4157"><td class="memItemLeft" align="right" valign="top"><a id="affe912c9996eec6a66d6c23fd6fe4157" name="affe912c9996eec6a66d6c23fd6fe4157"></a>
</td><td class="memItemRight" valign="bottom"><b>Handle_hash_function</b> ()</td></tr>
<tr class="memdesc:affe912c9996eec6a66d6c23fd6fe4157"><td class="mdescLeft"> </td><td class="mdescRight">Default constructor. <br></td></tr>
<tr class="separator:affe912c9996eec6a66d6c23fd6fe4157"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader">Operations</h2></td></tr>
<tr class="memitem:a425d5da776b0f7d410d7f05b884bbd8c"><td class="memTemplParams" colspan="2">template<class <a class="elRef" href="../Circulator/classHandle.html">Handle</a> > </td></tr>
<tr class="memitem:a425d5da776b0f7d410d7f05b884bbd8c"><td class="memTemplItemLeft" align="right" valign="top">std::size_t </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="structCGAL_1_1Handle__hash__function.html#a425d5da776b0f7d410d7f05b884bbd8c">operator()</a> (const <a class="elRef" href="../Circulator/classHandle.html">Handle</a> &key)</td></tr>
<tr class="memdesc:a425d5da776b0f7d410d7f05b884bbd8c"><td class="mdescLeft"> </td><td class="mdescRight">Returns unique hash value for any <code><a class="elRef" href="../Circulator/classHandle.html">Handle</a></code> type for which <code>&*key</code> gives a unique address. <br></td></tr>
<tr class="separator:a425d5da776b0f7d410d7f05b884bbd8c"><td class="memSeparator" colspan="2"> </td></tr>
</table>
<h2 class="groupheader">Member Function Documentation</h2>
<a id="a425d5da776b0f7d410d7f05b884bbd8c" name="a425d5da776b0f7d410d7f05b884bbd8c"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a425d5da776b0f7d410d7f05b884bbd8c">◆ </a></span>operator()()</h2>
<div class="memitem">
<div class="memproto">
<div class="memtemplate">
template<class <a class="elRef" href="../Circulator/classHandle.html">Handle</a> > </div>
<table class="memname">
<tr>
<td class="memname">std::size_t CGAL::Handle_hash_function::operator() </td>
<td>(</td>
<td class="paramtype">const <a class="elRef" href="../Circulator/classHandle.html">Handle</a> & </td>
<td class="paramname"><em>key</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Returns unique hash value for any <code><a class="elRef" href="../Circulator/classHandle.html">Handle</a></code> type for which <code>&*key</code> gives a unique address. </p>
<p>The type <code>std::iterator_traits<<a class="elRef" href="../Circulator/classHandle.html">Handle</a>>::value_type</code> has to be defined (which it is already for pointers, handles, iterators, and circulators). </p>
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<li class="navelem"><b>CGAL</b></li><li class="navelem"><a class="el" href="structCGAL_1_1Handle__hash__function.html">Handle_hash_function</a></li>
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