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| <title>Class template xor_combine</title> |
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| <div class="refentry"> |
| <a name="boost.random.xor_combine"></a><div class="titlepage"></div> |
| <div class="refnamediv"> |
| <h2><span class="refentrytitle">Class template xor_combine</span></h2> |
| <p>boost::random::xor_combine</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: <<a class="link" href="../../boost_random/reference.html#header.boost.random.xor_combine_hpp" title="Header <boost/random/xor_combine.hpp>">boost/random/xor_combine.hpp</a>> |
| |
| </span><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> URNG1<span class="special">,</span> <span class="keyword">int</span> s1<span class="special">,</span> <span class="keyword">typename</span> URNG2<span class="special">,</span> <span class="keyword">int</span> s2<span class="special">></span> |
| <span class="keyword">class</span> <a class="link" href="xor_combine.html" title="Class template xor_combine">xor_combine</a> <span class="special">{</span> |
| <span class="keyword">public</span><span class="special">:</span> |
| <span class="comment">// types</span> |
| <span class="keyword">typedef</span> <span class="identifier">URNG1</span> <a name="boost.random.xor_combine.base1_type"></a><span class="identifier">base1_type</span><span class="special">;</span> |
| <span class="keyword">typedef</span> <span class="identifier">URNG2</span> <a name="boost.random.xor_combine.base2_type"></a><span class="identifier">base2_type</span><span class="special">;</span> |
| <span class="keyword">typedef</span> <span class="identifier">base1_type</span><span class="special">::</span><span class="identifier">result_type</span> <a name="boost.random.xor_combine.result_type"></a><span class="identifier">result_type</span><span class="special">;</span> |
| |
| <span class="comment">// <a class="link" href="xor_combine.html#boost.random.xor_combineconstruct-copy-destruct">construct/copy/destruct</a></span> |
| <a class="link" href="xor_combine.html#id1150427-bb"><span class="identifier">xor_combine</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span> |
| <a class="link" href="xor_combine.html#id1150436-bb"><span class="identifier">xor_combine</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">base1_type</span> <span class="special">&</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">base2_type</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> |
| <a class="link" href="xor_combine.html#id1150457-bb"><span class="identifier">xor_combine</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">result_type</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> It<span class="special">></span> <a class="link" href="xor_combine.html#id1150475-bb"><span class="identifier">xor_combine</span></a><span class="special">(</span><span class="identifier">It</span> <span class="special">&</span><span class="special">,</span> <span class="identifier">It</span><span class="special">)</span><span class="special">;</span> |
| |
| <span class="comment">// <a class="link" href="xor_combine.html#id1150289-bb">public member functions</a></span> |
| <span class="keyword">void</span> <a class="link" href="xor_combine.html#id1150292-bb"><span class="identifier">seed</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span> |
| <span class="keyword">void</span> <a class="link" href="xor_combine.html#id1150307-bb"><span class="identifier">seed</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">result_type</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> It<span class="special">></span> <span class="keyword">void</span> <a class="link" href="xor_combine.html#id1150331-bb"><span class="identifier">seed</span></a><span class="special">(</span><span class="identifier">It</span> <span class="special">&</span><span class="special">,</span> <span class="identifier">It</span><span class="special">)</span><span class="special">;</span> |
| <span class="keyword">const</span> <span class="identifier">base1_type</span> <span class="special">&</span> <a class="link" href="xor_combine.html#id1150368-bb"><span class="identifier">base1</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span> |
| <span class="keyword">const</span> <span class="identifier">base2_type</span> <span class="special">&</span> <a class="link" href="xor_combine.html#id1150380-bb"><span class="identifier">base2</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span> |
| <span class="identifier">result_type</span> <a class="link" href="xor_combine.html#id1150392-bb"><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span> |
| <span class="identifier">result_type</span> <a class="link" href="xor_combine.html#id1150403-bb"><span class="identifier">min</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> |
| <span class="identifier">result_type</span> <a class="link" href="xor_combine.html#id1150415-bb"><span class="identifier">max</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> |
| |
| <span class="comment">// <a class="link" href="xor_combine.html#id1150509-bb">public static functions</a></span> |
| <span class="keyword">static</span> <span class="keyword">bool</span> <a class="link" href="xor_combine.html#id1150513-bb"><span class="identifier">validation</span></a><span class="special">(</span><span class="identifier">result_type</span><span class="special">)</span><span class="special">;</span> |
| <span class="keyword">static</span> <span class="keyword">const</span> <span class="keyword">bool</span> has_fixed_range<span class="special">;</span> |
| <span class="keyword">static</span> <span class="keyword">const</span> <span class="keyword">int</span> shift1<span class="special">;</span> |
| <span class="keyword">static</span> <span class="keyword">const</span> <span class="keyword">int</span> shift2<span class="special">;</span> |
| <span class="special">}</span><span class="special">;</span></pre></div> |
| <div class="refsect1"> |
| <a name="id2518336"></a><h2>Description</h2> |
| <p>Instantiations of <code class="computeroutput">xor_combine</code> model a <a class="link" href="../../boost_random/reference.html#boost_random.reference.concepts.pseudo_random_number_generator" title="Pseudo-Random Number Generator">pseudo-random number generator</a> . To produce its output it invokes each of the base generators, shifts their results and xors them together. </p> |
| <div class="refsect2"> |
| <a name="id2518358"></a><h3> |
| <a name="boost.random.xor_combineconstruct-copy-destruct"></a><code class="computeroutput">xor_combine</code> |
| public |
| construct/copy/destruct</h3> |
| <div class="orderedlist"><ol class="orderedlist" type="1"> |
| <li class="listitem"> |
| <pre class="literallayout"><a name="id1150427-bb"></a><span class="identifier">xor_combine</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre> |
| <p>Constructors a <code class="computeroutput">xor_combine</code> by default constructing both base generators. </p> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><a name="id1150436-bb"></a><span class="identifier">xor_combine</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">base1_type</span> <span class="special">&</span> rng1<span class="special">,</span> <span class="keyword">const</span> <span class="identifier">base2_type</span> <span class="special">&</span> rng2<span class="special">)</span><span class="special">;</span></pre> |
| <p>Constructs a <code class="computeroutput">xor_combine</code> by copying two base generators. </p> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><a name="id1150457-bb"></a><span class="identifier">xor_combine</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">result_type</span> <span class="special">&</span> v<span class="special">)</span><span class="special">;</span></pre> |
| <p>Constructs a <code class="computeroutput">xor_combine</code>, seeding both base generators with <code class="computeroutput">v</code>. </p> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> It<span class="special">></span> <a name="id1150475-bb"></a><span class="identifier">xor_combine</span><span class="special">(</span><span class="identifier">It</span> <span class="special">&</span> first<span class="special">,</span> <span class="identifier">It</span> last<span class="special">)</span><span class="special">;</span></pre> |
| <p>Constructs a <code class="computeroutput">xor_combine</code>, seeding both base generators with values from the iterator range [first, last) and changes first to point to the element after the last one used. If there are not enough elements in the range to seed both generators, throws <code class="computeroutput">std::invalid_argument</code>. </p> |
| </li> |
| </ol></div> |
| </div> |
| <div class="refsect2"> |
| <a name="id2518641"></a><h3> |
| <a name="id1150289-bb"></a><code class="computeroutput">xor_combine</code> public member functions</h3> |
| <div class="orderedlist"><ol class="orderedlist" type="1"> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">void</span> <a name="id1150292-bb"></a><span class="identifier">seed</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre> |
| <p>Calls <code class="computeroutput">seed()</code> for both base generators. </p> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">void</span> <a name="id1150307-bb"></a><span class="identifier">seed</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">result_type</span> <span class="special">&</span> v<span class="special">)</span><span class="special">;</span></pre> |
| <p><code class="computeroutput">seeds</code> both base generators with <code class="computeroutput">v</code>. </p> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> It<span class="special">></span> <span class="keyword">void</span> <a name="id1150331-bb"></a><span class="identifier">seed</span><span class="special">(</span><span class="identifier">It</span> <span class="special">&</span> first<span class="special">,</span> <span class="identifier">It</span> last<span class="special">)</span><span class="special">;</span></pre> |
| <p>seeds both base generators with values from the iterator range [first, last) and changes first to point to the element after the last one used. If there are not enough elements in the range to seed both generators, throws <code class="computeroutput">std::invalid_argument</code>. </p> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">const</span> <span class="identifier">base1_type</span> <span class="special">&</span> <a name="id1150368-bb"></a><span class="identifier">base1</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre> |
| <p>Returns the first base generator. </p> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">const</span> <span class="identifier">base2_type</span> <span class="special">&</span> <a name="id1150380-bb"></a><span class="identifier">base2</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre> |
| <p>Returns the second base generator. </p> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="identifier">result_type</span> <a name="id1150392-bb"></a><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre> |
| <p>Returns the next value of the generator. </p> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="identifier">result_type</span> <a name="id1150403-bb"></a><span class="identifier">min</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre> |
| <p>Returns the smallest value that the generator can produce. </p> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="identifier">result_type</span> <a name="id1150415-bb"></a><span class="identifier">max</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre> |
| <p>Returns the largest value that the generator can produce. </p> |
| </li> |
| </ol></div> |
| </div> |
| <div class="refsect2"> |
| <a name="id2519085"></a><h3> |
| <a name="id1150509-bb"></a><code class="computeroutput">xor_combine</code> public static functions</h3> |
| <div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem"><pre class="literallayout"><span class="keyword">static</span> <span class="keyword">bool</span> <a name="id1150513-bb"></a><span class="identifier">validation</span><span class="special">(</span><span class="identifier">result_type</span> x<span class="special">)</span><span class="special">;</span></pre></li></ol></div> |
| </div> |
| </div> |
| </div> |
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| <td align="left"></td> |
| <td align="right"><div class="copyright-footer">Copyright © 2000 -2005 Jens Maurer, 2009 Steven Watanabe<p> |
| Distributed under the Boost Software License, Version 1.0. (See accompanying |
| 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>) |
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