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  26 <div class="refentry">
  27 <a name="boost.random.lagged_fibonacci_01_engine"></a><div class="titlepage"></div>
  28 <div class="refnamediv">
  29 <h2><span class="refentrytitle">Class template lagged_fibonacci_01_engine</span></h2>
  30 <p>boost::random::lagged_fibonacci_01_engine</p>
  31 </div>
  32 <h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
  33 <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_random/reference.html#header.boost.random.lagged_fibonacci_hpp" title="Header &lt;boost/random/lagged_fibonacci.hpp&gt;">boost/random/lagged_fibonacci.hpp</a>&gt;
  34
  35 </span><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> RealType<span class="special">,</span> <span class="keyword">int</span> w<span class="special">,</span> <span class="keyword">unsigned</span> <span class="keyword">int</span> p<span class="special">,</span> <span class="keyword">unsigned</span> <span class="keyword">int</span> q<span class="special">&gt;</span>
  36 <span class="keyword">class</span> <a class="link" href="lagged_fibonacci_01_engine.html" title="Class template lagged_fibonacci_01_engine">lagged_fibonacci_01_engine</a> <span class="special">{</span>
  37 <span class="keyword">public</span><span class="special">:</span>
  38   <span class="comment">// types</span>
  39   <span class="keyword">typedef</span> <span class="identifier">RealType</span> <a name="boost.random.lagged_fibonacci_01_engine.result_type"></a><span class="identifier">result_type</span><span class="special">;</span>
  40
  41   <span class="comment">// <a class="link" href="lagged_fibonacci_01_engine.html#boost.random.lagged_fibonacci_01_engineconstruct-copy-destruct">construct/copy/destruct</a></span>
  42   <a class="link" href="lagged_fibonacci_01_engine.html#idp709759840-bb"><span class="identifier">lagged_fibonacci_01_engine</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
  43   <span class="keyword">explicit</span> <a class="link" href="lagged_fibonacci_01_engine.html#idp709761440-bb"><span class="identifier">lagged_fibonacci_01_engine</span></a><span class="special">(</span><span class="identifier">uint32_t</span><span class="special">)</span><span class="special">;</span>
  44   <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> SeedSeq<span class="special">&gt;</span> <span class="keyword">explicit</span> <a class="link" href="lagged_fibonacci_01_engine.html#idp709764000-bb"><span class="identifier">lagged_fibonacci_01_engine</span></a><span class="special">(</span><span class="identifier">SeedSeq</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  45   <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> It<span class="special">&gt;</span> <a class="link" href="lagged_fibonacci_01_engine.html#idp709767408-bb"><span class="identifier">lagged_fibonacci_01_engine</span></a><span class="special">(</span><span class="identifier">It</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">It</span><span class="special">)</span><span class="special">;</span>
  46
  47   <span class="comment">// <a class="link" href="lagged_fibonacci_01_engine.html#idp709737856-bb">public member functions</a></span>
  48   <span class="keyword">void</span> <a class="link" href="lagged_fibonacci_01_engine.html#idp709738416-bb"><span class="identifier">seed</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
  49   <span class="keyword">void</span> <a class="link" href="lagged_fibonacci_01_engine.html#idp709739696-bb"><span class="identifier">seed</span></a><span class="special">(</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">uint32_t</span><span class="special">)</span><span class="special">;</span>
  50   <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> SeedSeq<span class="special">&gt;</span> <span class="keyword">void</span> <a class="link" href="lagged_fibonacci_01_engine.html#idp709743376-bb"><span class="identifier">seed</span></a><span class="special">(</span><span class="identifier">SeedSeq</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> It<span class="special">&gt;</span> <span class="keyword">void</span> <a class="link" href="lagged_fibonacci_01_engine.html#idp709747536-bb"><span class="identifier">seed</span></a><span class="special">(</span><span class="identifier">It</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">It</span><span class="special">)</span><span class="special">;</span>
  52   <span class="identifier">result_type</span> <a class="link" href="lagged_fibonacci_01_engine.html#idp709752464-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>
  53   <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> Iter<span class="special">&gt;</span> <span class="keyword">void</span> <a class="link" href="lagged_fibonacci_01_engine.html#idp709753760-bb"><span class="identifier">generate</span></a><span class="special">(</span><span class="identifier">Iter</span><span class="special">,</span> <span class="identifier">Iter</span><span class="special">)</span><span class="special">;</span>
  54   <span class="keyword">void</span> <a class="link" href="lagged_fibonacci_01_engine.html#idp709757264-bb"><span class="identifier">discard</span></a><span class="special">(</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">uintmax_t</span><span class="special">)</span><span class="special">;</span>
  55
  56   <span class="comment">// <a class="link" href="lagged_fibonacci_01_engine.html#idp709769920-bb">public static functions</a></span>
  57   <span class="keyword">static</span> <span class="identifier">result_type</span> <a class="link" href="lagged_fibonacci_01_engine.html#idp709770480-bb"><span class="identifier">min</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
  58   <span class="keyword">static</span> <span class="identifier">result_type</span> <a class="link" href="lagged_fibonacci_01_engine.html#idp709772064-bb"><span class="identifier">max</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
  59
  60   <span class="comment">// <a class="link" href="lagged_fibonacci_01_engine.html#idp709773792-bb">friend functions</a></span>
  61   <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> CharT<span class="special">,</span> <span class="keyword">typename</span> Traits<span class="special">&gt;</span>
  62     <span class="keyword">friend</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_ostream</span><span class="special">&lt;</span> <span class="identifier">CharT</span><span class="special">,</span> <span class="identifier">Traits</span> <span class="special">&gt;</span> <span class="special">&amp;</span>
  63     <a class="link" href="lagged_fibonacci_01_engine.html#idp709774352-bb"><span class="keyword">operator</span><span class="special">&lt;&lt;</span></a><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_ostream</span><span class="special">&lt;</span> <span class="identifier">CharT</span><span class="special">,</span> <span class="identifier">Traits</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">,</span>
  64                <span class="keyword">const</span> <a class="link" href="lagged_fibonacci_01_engine.html" title="Class template lagged_fibonacci_01_engine">lagged_fibonacci_01_engine</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  65   <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> CharT<span class="special">,</span> <span class="keyword">typename</span> Traits<span class="special">&gt;</span>
  66     <span class="keyword">friend</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_istream</span><span class="special">&lt;</span> <span class="identifier">CharT</span><span class="special">,</span> <span class="identifier">Traits</span> <span class="special">&gt;</span> <span class="special">&amp;</span>
  67     <a class="link" href="lagged_fibonacci_01_engine.html#idp709779408-bb"><span class="keyword">operator</span><span class="special">&gt;&gt;</span></a><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_istream</span><span class="special">&lt;</span> <span class="identifier">CharT</span><span class="special">,</span> <span class="identifier">Traits</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">,</span>
  68                <span class="keyword">const</span> <a class="link" href="lagged_fibonacci_01_engine.html" title="Class template lagged_fibonacci_01_engine">lagged_fibonacci_01_engine</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  69   <span class="keyword">friend</span> <span class="keyword">bool</span> <a class="link" href="lagged_fibonacci_01_engine.html#idp709784464-bb"><span class="keyword">operator</span><span class="special">==</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="lagged_fibonacci_01_engine.html" title="Class template lagged_fibonacci_01_engine">lagged_fibonacci_01_engine</a> <span class="special">&amp;</span><span class="special">,</span>
  70                          <span class="keyword">const</span> <a class="link" href="lagged_fibonacci_01_engine.html" title="Class template lagged_fibonacci_01_engine">lagged_fibonacci_01_engine</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  71   <span class="keyword">friend</span> <span class="keyword">bool</span> <a class="link" href="lagged_fibonacci_01_engine.html#idp709788096-bb"><span class="keyword">operator</span><span class="special">!=</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="lagged_fibonacci_01_engine.html" title="Class template lagged_fibonacci_01_engine">lagged_fibonacci_01_engine</a> <span class="special">&amp;</span><span class="special">,</span>
  72                          <span class="keyword">const</span> <a class="link" href="lagged_fibonacci_01_engine.html" title="Class template lagged_fibonacci_01_engine">lagged_fibonacci_01_engine</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  73
  74   <span class="comment">// public data members</span>
  75   <span class="keyword">static</span> <span class="keyword">const</span> <span class="keyword">bool</span> <span class="identifier">has_fixed_range</span><span class="special">;</span>
  76   <span class="keyword">static</span> <span class="keyword">const</span> <span class="keyword">int</span> <span class="identifier">word_size</span><span class="special">;</span>
  77   <span class="keyword">static</span> <span class="keyword">const</span> <span class="keyword">unsigned</span> <span class="keyword">int</span> <span class="identifier">long_lag</span><span class="special">;</span>
  78   <span class="keyword">static</span> <span class="keyword">const</span> <span class="keyword">unsigned</span> <span class="keyword">int</span> <span class="identifier">short_lag</span><span class="special">;</span>
  79   <span class="keyword">static</span> <span class="keyword">const</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">uint32_t</span> <span class="identifier">default_seed</span><span class="special">;</span>
  80 <span class="special">}</span><span class="special">;</span></pre></div>
  81 <div class="refsect1">
  82 <a name="idp498880560"></a><h2>Description</h2>
  83 <p>Instantiations of class template <code class="computeroutput">lagged_fibonacci_01</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> . It uses a lagged Fibonacci algorithm with two lags <code class="computeroutput">p</code> and <code class="computeroutput">q</code>, evaluated in floating-point arithmetic: x(i) = x(i-p) + x(i-q) (mod 1) with p &gt; q. See</p>
  84 <p> </p>
  85 <div class="blockquote"><blockquote class="blockquote"><p>  "Uniform random number generators for supercomputers", Richard Brent, Proc. of Fifth Australian Supercomputer Conference, Melbourne, Dec. 1992, pp. 704-706.  </p></blockquote></div>
  86 <p> </p>
  87 <p> </p>
  88 <div class="note"><table border="0" summary="Note">
  89 <tr>
  90 <td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../doc/src/images/note.png"></td>
  91 <th align="left">Note</th>
  92 </tr>
  93 <tr><td align="left" valign="top"><p>  The quality of the generator crucially depends on the choice of the parameters. User code should employ one of the sensibly parameterized generators such as <a class="link" href="lagged_fibonacci607.html" title="Type definition lagged_fibonacci607">lagged_fibonacci607</a>  instead.  </p></td></tr>
  94 </table></div>
  95 <p> </p>
  96 <p>The generator requires considerable amounts of memory for the storage of its state array. For example, <a class="link" href="lagged_fibonacci607.html" title="Type definition lagged_fibonacci607">lagged_fibonacci607</a>  requires about 4856 bytes and <a class="link" href="lagged_fibonacci44497.html" title="Type definition lagged_fibonacci44497">lagged_fibonacci44497</a>  requires about 350 KBytes. </p>
  97 <div class="refsect2">
  98 <a name="idp498889456"></a><h3>
  99 <a name="boost.random.lagged_fibonacci_01_engineconstruct-copy-destruct"></a><code class="computeroutput">lagged_fibonacci_01_engine</code>
 100         public
 101        construct/copy/destruct</h3>
 102 <div class="orderedlist"><ol class="orderedlist" type="1">
 103 <li class="listitem">
 104 <pre class="literallayout"><a name="idp709759840-bb"></a><span class="identifier">lagged_fibonacci_01_engine</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre>
 105 <p>Constructs a <code class="computeroutput">lagged_fibonacci_01</code> generator and calls <code class="computeroutput">seed()</code>. </p>
 106 </li>
 107 <li class="listitem">
 108 <pre class="literallayout"><span class="keyword">explicit</span> <a name="idp709761440-bb"></a><span class="identifier">lagged_fibonacci_01_engine</span><span class="special">(</span><span class="identifier">uint32_t</span> value<span class="special">)</span><span class="special">;</span></pre>
 109 <p>Constructs a <code class="computeroutput">lagged_fibonacci_01</code> generator and calls <code class="computeroutput">seed(value)</code>. </p>
 110 </li>
 111 <li class="listitem">
 112 <pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> SeedSeq<span class="special">&gt;</span> <span class="keyword">explicit</span> <a name="idp709764000-bb"></a><span class="identifier">lagged_fibonacci_01_engine</span><span class="special">(</span><span class="identifier">SeedSeq</span> <span class="special">&amp;</span> seq<span class="special">)</span><span class="special">;</span></pre>
 113 <p>Constructs a <code class="computeroutput">lagged_fibonacci_01</code> generator and calls <code class="computeroutput">seed(gen)</code>. </p>
 114 </li>
 115 <li class="listitem"><pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> It<span class="special">&gt;</span> <a name="idp709767408-bb"></a><span class="identifier">lagged_fibonacci_01_engine</span><span class="special">(</span><span class="identifier">It</span> <span class="special">&amp;</span> first<span class="special">,</span> <span class="identifier">It</span> last<span class="special">)</span><span class="special">;</span></pre></li>
 116 </ol></div>
 117 </div>
 118 <div class="refsect2">
 119 <a name="idp498922672"></a><h3>
 120 <a name="idp709737856-bb"></a><code class="computeroutput">lagged_fibonacci_01_engine</code> public member functions</h3>
 121 <div class="orderedlist"><ol class="orderedlist" type="1">
 122 <li class="listitem">
 123 <pre class="literallayout"><span class="keyword">void</span> <a name="idp709738416-bb"></a><span class="identifier">seed</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre>
 124 <p>Calls seed(default_seed). </p>
 125 </li>
 126 <li class="listitem">
 127 <pre class="literallayout"><span class="keyword">void</span> <a name="idp709739696-bb"></a><span class="identifier">seed</span><span class="special">(</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">uint32_t</span> value<span class="special">)</span><span class="special">;</span></pre>
 128 <p>Constructs a <code class="computeroutput"><a class="link" href="minstd_rand0.html" title="Type definition minstd_rand0">minstd_rand0</a></code>  generator with the constructor parameter value and calls seed with it. Distinct seeds in the range [1, 2147483647) will produce generators with different states. Other seeds will be equivalent to some seed within this range. See  <code class="computeroutput"><a class="link" href="linear_congruential_engine.html" title="Class template linear_congruential_engine">linear_congruential_engine</a></code> for details. </p>
 129 </li>
 130 <li class="listitem">
 131 <pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> SeedSeq<span class="special">&gt;</span> <span class="keyword">void</span> <a name="idp709743376-bb"></a><span class="identifier">seed</span><span class="special">(</span><span class="identifier">SeedSeq</span> <span class="special">&amp;</span> seq<span class="special">)</span><span class="special">;</span></pre>
 132 <p>Seeds this <code class="computeroutput"><code class="computeroutput"><a class="link" href="lagged_fibonacci_01_engine.html" title="Class template lagged_fibonacci_01_engine">lagged_fibonacci_01_engine</a></code></code> using values produced by <code class="computeroutput">seq.generate</code>. </p>
 133 </li>
 134 <li class="listitem">
 135 <pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> It<span class="special">&gt;</span> <span class="keyword">void</span> <a name="idp709747536-bb"></a><span class="identifier">seed</span><span class="special">(</span><span class="identifier">It</span> <span class="special">&amp;</span> first<span class="special">,</span> <span class="identifier">It</span> last<span class="special">)</span><span class="special">;</span></pre>
 136 <p>Seeds this <code class="computeroutput"><code class="computeroutput"><a class="link" href="lagged_fibonacci_01_engine.html" title="Class template lagged_fibonacci_01_engine">lagged_fibonacci_01_engine</a></code></code> using values from the iterator range [first, last). If there are not enough elements in the range, throws <code class="computeroutput">std::invalid_argument</code>. </p>
 137 </li>
 138 <li class="listitem">
 139 <pre class="literallayout"><span class="identifier">result_type</span> <a name="idp709752464-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>
 140 <p>Returns the next value of the generator. </p>
 141 </li>
 142 <li class="listitem">
 143 <pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> Iter<span class="special">&gt;</span> <span class="keyword">void</span> <a name="idp709753760-bb"></a><span class="identifier">generate</span><span class="special">(</span><span class="identifier">Iter</span> first<span class="special">,</span> <span class="identifier">Iter</span> last<span class="special">)</span><span class="special">;</span></pre>
 144 <p>Fills a range with random values </p>
 145 </li>
 146 <li class="listitem">
 147 <pre class="literallayout"><span class="keyword">void</span> <a name="idp709757264-bb"></a><span class="identifier">discard</span><span class="special">(</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">uintmax_t</span> z<span class="special">)</span><span class="special">;</span></pre>
 148 <p>Advances the state of the generator by <code class="computeroutput">z</code>. </p>
 149 </li>
 150 </ol></div>
 151 </div>
 152 <div class="refsect2">
 153 <a name="idp498983872"></a><h3>
 154 <a name="idp709769920-bb"></a><code class="computeroutput">lagged_fibonacci_01_engine</code> public static functions</h3>
 155 <div class="orderedlist"><ol class="orderedlist" type="1">
 156 <li class="listitem">
 157 <pre class="literallayout"><span class="keyword">static</span> <span class="identifier">result_type</span> <a name="idp709770480-bb"></a><span class="identifier">min</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre>
 158 <p>Returns the smallest value that the generator can produce. </p>
 159 </li>
 160 <li class="listitem">
 161 <pre class="literallayout"><span class="keyword">static</span> <span class="identifier">result_type</span> <a name="idp709772064-bb"></a><span class="identifier">max</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre>
 162 <p>Returns the upper bound of the generators outputs. </p>
 163 </li>
 164 </ol></div>
 165 </div>
 166 <div class="refsect2">
 167 <a name="idp498996640"></a><h3>
 168 <a name="idp709773792-bb"></a><code class="computeroutput">lagged_fibonacci_01_engine</code> friend functions</h3>
 169 <div class="orderedlist"><ol class="orderedlist" type="1">
 170 <li class="listitem">
 171 <pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> CharT<span class="special">,</span> <span class="keyword">typename</span> Traits<span class="special">&gt;</span>
 172   <span class="keyword">friend</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_ostream</span><span class="special">&lt;</span> <span class="identifier">CharT</span><span class="special">,</span> <span class="identifier">Traits</span> <span class="special">&gt;</span> <span class="special">&amp;</span>
 173   <a name="idp709774352-bb"></a><span class="keyword">operator</span><span class="special">&lt;&lt;</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_ostream</span><span class="special">&lt;</span> <span class="identifier">CharT</span><span class="special">,</span> <span class="identifier">Traits</span> <span class="special">&gt;</span> <span class="special">&amp;</span> os<span class="special">,</span>
 174              <span class="keyword">const</span> <a class="link" href="lagged_fibonacci_01_engine.html" title="Class template lagged_fibonacci_01_engine">lagged_fibonacci_01_engine</a> <span class="special">&amp;</span> f<span class="special">)</span><span class="special">;</span></pre>
 175 <p>Writes the textual representation of the generator to a <code class="computeroutput">std::ostream</code>. </p>
 176 </li>
 177 <li class="listitem">
 178 <pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> CharT<span class="special">,</span> <span class="keyword">typename</span> Traits<span class="special">&gt;</span>
 179   <span class="keyword">friend</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_istream</span><span class="special">&lt;</span> <span class="identifier">CharT</span><span class="special">,</span> <span class="identifier">Traits</span> <span class="special">&gt;</span> <span class="special">&amp;</span>
 180   <a name="idp709779408-bb"></a><span class="keyword">operator</span><span class="special">&gt;&gt;</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_istream</span><span class="special">&lt;</span> <span class="identifier">CharT</span><span class="special">,</span> <span class="identifier">Traits</span> <span class="special">&gt;</span> <span class="special">&amp;</span> is<span class="special">,</span>
 181              <span class="keyword">const</span> <a class="link" href="lagged_fibonacci_01_engine.html" title="Class template lagged_fibonacci_01_engine">lagged_fibonacci_01_engine</a> <span class="special">&amp;</span> f<span class="special">)</span><span class="special">;</span></pre>
 182 <p>Reads the textual representation of the generator from a <code class="computeroutput">std::istream</code>. </p>
 183 </li>
 184 <li class="listitem">
 185 <pre class="literallayout"><span class="keyword">friend</span> <span class="keyword">bool</span> <a name="idp709784464-bb"></a><span class="keyword">operator</span><span class="special">==</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="lagged_fibonacci_01_engine.html" title="Class template lagged_fibonacci_01_engine">lagged_fibonacci_01_engine</a> <span class="special">&amp;</span> x_<span class="special">,</span>
 186                        <span class="keyword">const</span> <a class="link" href="lagged_fibonacci_01_engine.html" title="Class template lagged_fibonacci_01_engine">lagged_fibonacci_01_engine</a> <span class="special">&amp;</span> y_<span class="special">)</span><span class="special">;</span></pre>
 187 <p>Returns true if the two generators will produce identical sequences of outputs. </p>
 188 </li>
 189 <li class="listitem">
 190 <pre class="literallayout"><span class="keyword">friend</span> <span class="keyword">bool</span> <a name="idp709788096-bb"></a><span class="keyword">operator</span><span class="special">!=</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="lagged_fibonacci_01_engine.html" title="Class template lagged_fibonacci_01_engine">lagged_fibonacci_01_engine</a> <span class="special">&amp;</span> lhs<span class="special">,</span>
 191                        <span class="keyword">const</span> <a class="link" href="lagged_fibonacci_01_engine.html" title="Class template lagged_fibonacci_01_engine">lagged_fibonacci_01_engine</a> <span class="special">&amp;</span> rhs<span class="special">)</span><span class="special">;</span></pre>
 192 <p>Returns true if the two generators will produce different sequences of outputs. </p>
 193 </li>
 194 </ol></div>
 195 </div>
 196 </div>
 197 </div>
 198 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
 199 <td align="left"></td>
 200 <td align="right"><div class="copyright-footer">Copyright &#169; 2000-2005 Jens Maurer<br>Copyright &#169; 2009, 2010 Steven Watanabe<p>
 201         Distributed under the Boost Software License, Version 1.0. (See accompanying
 202         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>)
 203       </p>
 204 </div></td>
 205 </tr></table>
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