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  25 <div class="refentry">
  26 <a name="boost.compute.mersenne_twister_engine"></a><div class="titlepage"></div>
  27 <div class="refnamediv">
  28 <h2><span class="refentrytitle">Class template mersenne_twister_engine</span></h2>
  29 <p>boost::compute::mersenne_twister_engine &#8212; Mersenne twister pseudorandom number generator. </p>
  30 </div>
  31 <h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
  32 <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="../../boost_compute/reference.html#header.boost.compute.random.mersenne_twister_engine_hpp" title="Header &lt;boost/compute/random/mersenne_twister_engine.hpp&gt;">boost/compute/random/mersenne_twister_engine.hpp</a>&gt;
  33
  34 </span><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span>
  35 <span class="keyword">class</span> <a class="link" href="mersenne_twister_engine.html" title="Class template mersenne_twister_engine">mersenne_twister_engine</a> <span class="special">{</span>
  36 <span class="keyword">public</span><span class="special">:</span>
  37   <span class="comment">// types</span>
  38   <span class="keyword">typedef</span> <span class="identifier">T</span> <a name="boost.compute.mersenne_twister_engine.result_type"></a><span class="identifier">result_type</span><span class="special">;</span>
  39
  40   <span class="comment">// <a class="link" href="mersenne_twister_engine.html#boost.compute.mersenne_twister_engineconstruct-copy-destruct">construct/copy/destruct</a></span>
  41   <span class="keyword">explicit</span> <a class="link" href="mersenne_twister_engine.html#idm46009691833664-bb"><span class="identifier">mersenne_twister_engine</span></a><span class="special">(</span><span class="identifier">command_queue</span> <span class="special">&amp;</span><span class="special">,</span>
  42                                    <span class="identifier">result_type</span> <span class="special">=</span> <span class="identifier">default_seed</span><span class="special">)</span><span class="special">;</span>
  43   <a class="link" href="mersenne_twister_engine.html#idm46009691829968-bb"><span class="identifier">mersenne_twister_engine</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="mersenne_twister_engine.html" title="Class template mersenne_twister_engine">mersenne_twister_engine</a><span class="special">&lt;</span> <span class="identifier">T</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  44   <a class="link" href="mersenne_twister_engine.html" title="Class template mersenne_twister_engine">mersenne_twister_engine</a><span class="special">&lt;</span> <span class="identifier">T</span> <span class="special">&gt;</span> <span class="special">&amp;</span>
  45   <a class="link" href="mersenne_twister_engine.html#idm46009691827072-bb"><span class="keyword">operator</span><span class="special">=</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="mersenne_twister_engine.html" title="Class template mersenne_twister_engine">mersenne_twister_engine</a><span class="special">&lt;</span> <span class="identifier">T</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  46   <a class="link" href="mersenne_twister_engine.html#idm46009691823888-bb"><span class="special">~</span><span class="identifier">mersenne_twister_engine</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
  47
  48   <span class="comment">// <a class="link" href="mersenne_twister_engine.html#idm46009691855968-bb">public member functions</a></span>
  49   <span class="keyword">void</span> <a class="link" href="mersenne_twister_engine.html#idm46009691855408-bb"><span class="identifier">seed</span></a><span class="special">(</span><span class="identifier">result_type</span><span class="special">,</span> <span class="identifier">command_queue</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  50   <span class="keyword">void</span> <a class="link" href="mersenne_twister_engine.html#idm46009691850672-bb"><span class="identifier">seed</span></a><span class="special">(</span><span class="identifier">command_queue</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  51   <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> OutputIterator<span class="special">&gt;</span>
  52     <span class="keyword">void</span> <a class="link" href="mersenne_twister_engine.html#idm46009691848592-bb"><span class="identifier">generate</span></a><span class="special">(</span><span class="identifier">OutputIterator</span><span class="special">,</span> <span class="identifier">OutputIterator</span><span class="special">,</span> <span class="identifier">command_queue</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  53   <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> OutputIterator<span class="special">,</span> <span class="keyword">typename</span> Function<span class="special">&gt;</span>
  54     <span class="keyword">void</span> <a class="link" href="mersenne_twister_engine.html#idm46009691843616-bb"><span class="identifier">generate</span></a><span class="special">(</span><span class="identifier">OutputIterator</span><span class="special">,</span> <span class="identifier">OutputIterator</span><span class="special">,</span> <span class="identifier">Function</span><span class="special">,</span> <span class="identifier">command_queue</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  55   <span class="keyword">void</span> <a class="link" href="mersenne_twister_engine.html#idm46009691836800-bb"><span class="identifier">discard</span></a><span class="special">(</span><span class="identifier">size_t</span><span class="special">,</span> <span class="identifier">command_queue</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  56
  57   <span class="comment">// public data members</span>
  58   <span class="keyword">static</span> <span class="keyword">const</span> <span class="identifier">T</span> <span class="identifier">default_seed</span><span class="special">;</span>
  59   <span class="keyword">static</span> <span class="keyword">const</span> <span class="identifier">T</span> <span class="identifier">n</span><span class="special">;</span>
  60   <span class="keyword">static</span> <span class="keyword">const</span> <span class="identifier">T</span> <span class="identifier">m</span><span class="special">;</span>
  61 <span class="special">}</span><span class="special">;</span></pre></div>
  62 <div class="refsect1">
  63 <a name="idm46113316771360"></a><h2>Description</h2>
  64 <div class="refsect2">
  65 <a name="idm46113316770944"></a><h3>
  66 <a name="boost.compute.mersenne_twister_engineconstruct-copy-destruct"></a><code class="computeroutput">mersenne_twister_engine</code>
  67         public
  68        construct/copy/destruct</h3>
  69 <div class="orderedlist"><ol class="orderedlist" type="1">
  70 <li class="listitem">
  71 <pre class="literallayout"><span class="keyword">explicit</span> <a name="idm46009691833664-bb"></a><span class="identifier">mersenne_twister_engine</span><span class="special">(</span><span class="identifier">command_queue</span> <span class="special">&amp;</span> queue<span class="special">,</span>
  72                                  <span class="identifier">result_type</span> value <span class="special">=</span> <span class="identifier">default_seed</span><span class="special">)</span><span class="special">;</span></pre>Creates a new <code class="computeroutput"><a class="link" href="mersenne_twister_engine.html" title="Class template mersenne_twister_engine">mersenne_twister_engine</a></code> and seeds it with <code class="computeroutput">value</code>. </li>
  73 <li class="listitem">
  74 <pre class="literallayout"><a name="idm46009691829968-bb"></a><span class="identifier">mersenne_twister_engine</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="mersenne_twister_engine.html" title="Class template mersenne_twister_engine">mersenne_twister_engine</a><span class="special">&lt;</span> <span class="identifier">T</span> <span class="special">&gt;</span> <span class="special">&amp;</span> other<span class="special">)</span><span class="special">;</span></pre>Creates a new <code class="computeroutput"><a class="link" href="mersenne_twister_engine.html" title="Class template mersenne_twister_engine">mersenne_twister_engine</a></code> object as a copy of <code class="computeroutput">other</code>. </li>
  75 <li class="listitem">
  76 <pre class="literallayout"><a class="link" href="mersenne_twister_engine.html" title="Class template mersenne_twister_engine">mersenne_twister_engine</a><span class="special">&lt;</span> <span class="identifier">T</span> <span class="special">&gt;</span> <span class="special">&amp;</span>
  77 <a name="idm46009691827072-bb"></a><span class="keyword">operator</span><span class="special">=</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="mersenne_twister_engine.html" title="Class template mersenne_twister_engine">mersenne_twister_engine</a><span class="special">&lt;</span> <span class="identifier">T</span> <span class="special">&gt;</span> <span class="special">&amp;</span> other<span class="special">)</span><span class="special">;</span></pre>Copies <code class="computeroutput">other</code> to <code class="computeroutput">*this</code>. </li>
  78 <li class="listitem">
  79 <pre class="literallayout"><a name="idm46009691823888-bb"></a><span class="special">~</span><span class="identifier">mersenne_twister_engine</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre>Destroys the <code class="computeroutput"><a class="link" href="mersenne_twister_engine.html" title="Class template mersenne_twister_engine">mersenne_twister_engine</a></code> object. </li>
  80 </ol></div>
  81 </div>
  82 <div class="refsect2">
  83 <a name="idm46113316729568"></a><h3>
  84 <a name="idm46009691855968-bb"></a><code class="computeroutput">mersenne_twister_engine</code> public member functions</h3>
  85 <div class="orderedlist"><ol class="orderedlist" type="1">
  86 <li class="listitem">
  87 <pre class="literallayout"><span class="keyword">void</span> <a name="idm46009691855408-bb"></a><span class="identifier">seed</span><span class="special">(</span><span class="identifier">result_type</span> value<span class="special">,</span> <span class="identifier">command_queue</span> <span class="special">&amp;</span> queue<span class="special">)</span><span class="special">;</span></pre>
  88 <p>Seeds the random number generator with <code class="computeroutput">value</code>.</p>
  89 <p>
  90 If no seed value is provided, <code class="computeroutput">default_seed</code> is used. </p>
  91 <div class="variablelist"><table border="0" class="variablelist compact">
  92 <colgroup>
  93 <col align="left" valign="top">
  94 <col>
  95 </colgroup>
  96 <tbody><tr>
  97 <td><p><span class="term">Parameters:</span></p></td>
  98 <td><div class="variablelist"><table border="0" class="variablelist compact">
  99 <colgroup>
 100 <col align="left" valign="top">
 101 <col>
 102 </colgroup>
 103 <tbody>
 104 <tr>
 105 <td><p><span class="term"><code class="computeroutput">queue</code></span></p></td>
 106 <td><p>command queue to perform the operation</p></td>
 107 </tr>
 108 <tr>
 109 <td><p><span class="term"><code class="computeroutput">value</code></span></p></td>
 110 <td><p>seed value for the random-number generator </p></td>
 111 </tr>
 112 </tbody>
 113 </table></div></td>
 114 </tr></tbody>
 115 </table></div>
 116 </li>
 117 <li class="listitem">
 118 <pre class="literallayout"><span class="keyword">void</span> <a name="idm46009691850672-bb"></a><span class="identifier">seed</span><span class="special">(</span><span class="identifier">command_queue</span> <span class="special">&amp;</span> queue<span class="special">)</span><span class="special">;</span></pre>
 119 <p>This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. </p>
 120 </li>
 121 <li class="listitem">
 122 <pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> OutputIterator<span class="special">&gt;</span>
 123   <span class="keyword">void</span> <a name="idm46009691848592-bb"></a><span class="identifier">generate</span><span class="special">(</span><span class="identifier">OutputIterator</span> first<span class="special">,</span> <span class="identifier">OutputIterator</span> last<span class="special">,</span>
 124                 <span class="identifier">command_queue</span> <span class="special">&amp;</span> queue<span class="special">)</span><span class="special">;</span></pre>Generates random numbers and stores them to the range [<code class="computeroutput">first</code>, <code class="computeroutput">last</code>). </li>
 125 <li class="listitem">
 126 <pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> OutputIterator<span class="special">,</span> <span class="keyword">typename</span> Function<span class="special">&gt;</span>
 127   <span class="keyword">void</span> <a name="idm46009691843616-bb"></a><span class="identifier">generate</span><span class="special">(</span><span class="identifier">OutputIterator</span> first<span class="special">,</span> <span class="identifier">OutputIterator</span> last<span class="special">,</span> <span class="identifier">Function</span> op<span class="special">,</span>
 128                 <span class="identifier">command_queue</span> <span class="special">&amp;</span> queue<span class="special">)</span><span class="special">;</span></pre>
 129 <p>Generates random numbers, transforms them with <code class="computeroutput">op</code>, and then stores them to the range [<code class="computeroutput">first</code>, <code class="computeroutput">last</code>). </p>
 130 </li>
 131 <li class="listitem">
 132 <pre class="literallayout"><span class="keyword">void</span> <a name="idm46009691836800-bb"></a><span class="identifier">discard</span><span class="special">(</span><span class="identifier">size_t</span> z<span class="special">,</span> <span class="identifier">command_queue</span> <span class="special">&amp;</span> queue<span class="special">)</span><span class="special">;</span></pre>Generates <code class="computeroutput">z</code> random numbers and discards them. </li>
 133 </ol></div>
 134 </div>
 135 </div>
 136 </div>
 137 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
 138 <td align="left"></td>
 139 <td align="right"><div class="copyright-footer">Copyright &#169; 2013, 2014 Kyle Lutz<p>
 140         Distributed under the Boost Software License, Version 1.0. (See accompanying
 141         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
 142       </p>
 143 </div></td>
 144 </tr></table>
 145 <hr>
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