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src="../../../../doc/src/images/next.png" alt="Next"></a> 25</div> 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: <<a class="link" href="../../boost_random/reference.html#header.boost.random.lagged_fibonacci_hpp" title="Header <boost/random/lagged_fibonacci.hpp>">boost/random/lagged_fibonacci.hpp</a>> 34 35</span><span class="keyword">template</span><span class="special"><</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">></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#id-1_3_34_5_6_21_1_1_1_10-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#id-1_3_34_5_6_21_1_1_1_11-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"><</span><span class="keyword">typename</span> SeedSeq<span class="special">></span> <span class="keyword">explicit</span> <a class="link" href="lagged_fibonacci_01_engine.html#id-1_3_34_5_6_21_1_1_1_12-bb"><span class="identifier">lagged_fibonacci_01_engine</span></a><span class="special">(</span><span class="identifier">SeedSeq</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> 45 <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> It<span class="special">></span> <a class="link" href="lagged_fibonacci_01_engine.html#id-1_3_34_5_6_21_1_1_1_13-bb"><span class="identifier">lagged_fibonacci_01_engine</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> 46 47 <span class="comment">// <a class="link" href="lagged_fibonacci_01_engine.html#id-1_3_34_5_6_21_1_1_1_9-bb">public member functions</a></span> 48 <span class="keyword">void</span> <a class="link" href="lagged_fibonacci_01_engine.html#id-1_3_34_5_6_21_1_1_1_9_1-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#id-1_3_34_5_6_21_1_1_1_9_2-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"><</span><span class="keyword">typename</span> SeedSeq<span class="special">></span> <span class="keyword">void</span> <a class="link" href="lagged_fibonacci_01_engine.html#id-1_3_34_5_6_21_1_1_1_9_3-bb"><span class="identifier">seed</span></a><span class="special">(</span><span class="identifier">SeedSeq</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> 51 <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="lagged_fibonacci_01_engine.html#id-1_3_34_5_6_21_1_1_1_9_4-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> 52 <span class="identifier">result_type</span> <a class="link" href="lagged_fibonacci_01_engine.html#id-1_3_34_5_6_21_1_1_1_9_5-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"><</span><span class="keyword">typename</span> Iter<span class="special">></span> <span class="keyword">void</span> <a class="link" href="lagged_fibonacci_01_engine.html#id-1_3_34_5_6_21_1_1_1_9_6-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#id-1_3_34_5_6_21_1_1_1_9_7-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#id-1_3_34_5_6_21_1_1_1_14-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#id-1_3_34_5_6_21_1_1_1_14_1-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#id-1_3_34_5_6_21_1_1_1_14_2-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#id-1_3_34_5_6_21_1_1_1_15-bb">friend functions</a></span> 61 <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> CharT<span class="special">,</span> <span class="keyword">typename</span> Traits<span class="special">></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"><</span> <span class="identifier">CharT</span><span class="special">,</span> <span class="identifier">Traits</span> <span class="special">></span> <span class="special">&</span> 63 <a class="link" href="lagged_fibonacci_01_engine.html#id-1_3_34_5_6_21_1_1_1_15_1-bb"><span class="keyword">operator</span><span class="special"><<</span></a><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_ostream</span><span class="special"><</span> <span class="identifier">CharT</span><span class="special">,</span> <span class="identifier">Traits</span> <span class="special">></span> <span class="special">&</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">&</span><span class="special">)</span><span class="special">;</span> 65 <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> CharT<span class="special">,</span> <span class="keyword">typename</span> Traits<span class="special">></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"><</span> <span class="identifier">CharT</span><span class="special">,</span> <span class="identifier">Traits</span> <span class="special">></span> <span class="special">&</span> 67 <a class="link" href="lagged_fibonacci_01_engine.html#id-1_3_34_5_6_21_1_1_1_15_2-bb"><span class="keyword">operator</span><span class="special">>></span></a><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_istream</span><span class="special"><</span> <span class="identifier">CharT</span><span class="special">,</span> <span class="identifier">Traits</span> <span class="special">></span> <span class="special">&</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">&</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#id-1_3_34_5_6_21_1_1_1_15_3-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">&</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">&</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#id-1_3_34_5_6_21_1_1_1_15_4-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">&</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">&</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="id-1.3.34.5.6.20.3.4"></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 > 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="id-1.3.34.5.6.20.3.4.6"></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="id-1_3_34_5_6_21_1_1_1_10-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="id-1_3_34_5_6_21_1_1_1_11-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"><</span><span class="keyword">typename</span> SeedSeq<span class="special">></span> <span class="keyword">explicit</span> <a name="id-1_3_34_5_6_21_1_1_1_12-bb"></a><span class="identifier">lagged_fibonacci_01_engine</span><span class="special">(</span><span class="identifier">SeedSeq</span> <span class="special">&</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"><</span><span class="keyword">typename</span> It<span class="special">></span> <a name="id-1_3_34_5_6_21_1_1_1_13-bb"></a><span class="identifier">lagged_fibonacci_01_engine</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></li> 116</ol></div> 117</div> 118<div class="refsect2"> 119<a name="id-1.3.34.5.6.20.3.4.7"></a><h3> 120<a name="id-1_3_34_5_6_21_1_1_1_9-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="id-1_3_34_5_6_21_1_1_1_9_1-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="id-1_3_34_5_6_21_1_1_1_9_2-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"><</span><span class="keyword">typename</span> SeedSeq<span class="special">></span> <span class="keyword">void</span> <a name="id-1_3_34_5_6_21_1_1_1_9_3-bb"></a><span class="identifier">seed</span><span class="special">(</span><span class="identifier">SeedSeq</span> <span class="special">&</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"><</span><span class="keyword">typename</span> It<span class="special">></span> <span class="keyword">void</span> <a name="id-1_3_34_5_6_21_1_1_1_9_4-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> 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="id-1_3_34_5_6_21_1_1_1_9_5-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"><</span><span class="keyword">typename</span> Iter<span class="special">></span> <span class="keyword">void</span> <a name="id-1_3_34_5_6_21_1_1_1_9_6-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="id-1_3_34_5_6_21_1_1_1_9_7-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="id-1.3.34.5.6.20.3.4.8"></a><h3> 154<a name="id-1_3_34_5_6_21_1_1_1_14-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="id-1_3_34_5_6_21_1_1_1_14_1-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="id-1_3_34_5_6_21_1_1_1_14_2-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="id-1.3.34.5.6.20.3.4.9"></a><h3> 168<a name="id-1_3_34_5_6_21_1_1_1_15-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"><</span><span class="keyword">typename</span> CharT<span class="special">,</span> <span class="keyword">typename</span> Traits<span class="special">></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"><</span> <span class="identifier">CharT</span><span class="special">,</span> <span class="identifier">Traits</span> <span class="special">></span> <span class="special">&</span> 173 <a name="id-1_3_34_5_6_21_1_1_1_15_1-bb"></a><span class="keyword">operator</span><span class="special"><<</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_ostream</span><span class="special"><</span> <span class="identifier">CharT</span><span class="special">,</span> <span class="identifier">Traits</span> <span class="special">></span> <span class="special">&</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">&</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"><</span><span class="keyword">typename</span> CharT<span class="special">,</span> <span class="keyword">typename</span> Traits<span class="special">></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"><</span> <span class="identifier">CharT</span><span class="special">,</span> <span class="identifier">Traits</span> <span class="special">></span> <span class="special">&</span> 180 <a name="id-1_3_34_5_6_21_1_1_1_15_2-bb"></a><span class="keyword">operator</span><span class="special">>></span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_istream</span><span class="special"><</span> <span class="identifier">CharT</span><span class="special">,</span> <span class="identifier">Traits</span> <span class="special">></span> <span class="special">&</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">&</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="id-1_3_34_5_6_21_1_1_1_15_3-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">&</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">&</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="id-1_3_34_5_6_21_1_1_1_15_4-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">&</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">&</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 © 2000-2005 Jens Maurer<br>Copyright © 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> 206<hr> 207<div class="spirit-nav"> 208<a accesskey="p" href="hellekalek1995.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../boost_random/reference.html#header.boost.random.lagged_fibonacci_hpp"><img src="../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="lagged_fibonacci_engine.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> 209</div> 210</body> 211</html> 212
