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+<title>Function template hash_value</title>
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+<h2><span class="refentrytitle">Function template hash_value</span></h2>
+<p>boost::hash_value &#8212; Provides hashing for <code class="computeroutput">variant</code> types so
+ that <code class="computeroutput">boost::hash</code> may compute hash.</p>
+</div>
+<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
+<div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: &lt;<a class="link" href="../variant/reference.html#header.boost.variant.variant_hpp" title="Header &lt;boost/variant/variant.hpp&gt;">boost/variant/variant.hpp</a>&gt;
+
+</span>
+<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T1<span class="special">,</span> <span class="keyword">typename</span> T2<span class="special">,</span> <span class="special">...</span><span class="special">,</span> <span class="keyword">typename</span> TN<span class="special">&gt;</span>
+ <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">hash_value</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="variant.html" title="Class template variant">variant</a><span class="special">&lt;</span><span class="identifier">T1</span><span class="special">,</span> <span class="identifier">T2</span><span class="special">,</span> <span class="special">...</span><span class="special">,</span> <span class="identifier">TN</span><span class="special">&gt;</span> <span class="special">&amp;</span> rhs<span class="special">)</span><span class="special">;</span></pre></div>
+<div class="refsect1">
+<a name="idp614711296"></a><h2>Description</h2>
+<div class="variablelist"><table border="0" class="variablelist compact">
+<colgroup>
+<col align="left" valign="top">
+<col>
+</colgroup>
+<tbody>
+<tr>
+<td><p><span class="term">Requires:</span></p></td>
+<td>Every bounded type of the <code class="computeroutput">variant</code> must
+ fulfill the requirements of the
+ <a class="link" href="../variant/reference.html#variant.concepts.hashable" title="Hashable"><span class="emphasis"><em>Hashable</em></span></a>
+ concept.</td>
+</tr>
+<tr>
+<td><p><span class="term">Effects:</span></p></td>
+<td>Calls <code class="computeroutput">boost::hash&lt;T&gt;()(x)</code>, where <code class="computeroutput">x</code> is
+ the content of <code class="computeroutput">rhs</code> and <code class="computeroutput">T</code> is its type.</td>
+</tr>
+<tr>
+<td><p><span class="term">Notes:</span></p></td>
+<td>Actually, this function is defined in
+ <code class="computeroutput">&lt;boost/variant/detail/hash_variant.hpp&gt;</code>
+ header.</td>
+</tr>
+</tbody>
+</table></div>
+</div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2002, 2003 Eric Friedman, Itay Maman<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>)
+ </p>
+</div></td>
+</tr></table>
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