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   5 <title>Class template discard_block_engine</title>
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  26 <div class="refentry">
  27 <a name="boost.random.discard_block_engine"></a><div class="titlepage"></div>
  28 <div class="refnamediv">
  29 <h2><span class="refentrytitle">Class template discard_block_engine</span></h2>
  30 <p>boost::random::discard_block_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.discard_block_hpp" title="Header &lt;boost/random/discard_block.hpp&gt;">boost/random/discard_block.hpp</a>&gt;
  34
  35 </span><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> UniformRandomNumberGenerator<span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> p<span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> r<span class="special">&gt;</span>
  36 <span class="keyword">class</span> <a class="link" href="discard_block_engine.html" title="Class template discard_block_engine">discard_block_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">UniformRandomNumberGenerator</span> <a name="boost.random.discard_block_engine.base_type"></a><span class="identifier">base_type</span><span class="special">;</span>
  40   <span class="keyword">typedef</span> <span class="identifier">base_type</span><span class="special">::</span><span class="identifier">result_type</span>       <a name="boost.random.discard_block_engine.result_type"></a><span class="identifier">result_type</span><span class="special">;</span>
  41
  42   <span class="comment">// <a class="link" href="discard_block_engine.html#boost.random.discard_block_engineconstruct-copy-destruct">construct/copy/destruct</a></span>
  43   <a class="link" href="discard_block_engine.html#idp708558352-bb"><span class="identifier">discard_block_engine</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
  44   <span class="keyword">explicit</span> <a class="link" href="discard_block_engine.html#idp708559088-bb"><span class="identifier">discard_block_engine</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">base_type</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  45   <span class="keyword">explicit</span> <a class="link" href="discard_block_engine.html#idp708561488-bb"><span class="identifier">discard_block_engine</span></a><span class="special">(</span><span class="identifier">base_type</span> <span class="special">&amp;&amp;</span><span class="special">)</span><span class="special">;</span>
  46   <span class="keyword">explicit</span> <a class="link" href="discard_block_engine.html#idp708563888-bb"><span class="identifier">discard_block_engine</span></a><span class="special">(</span><span class="identifier">seed_type</span><span class="special">)</span><span class="special">;</span>
  47   <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="discard_block_engine.html#idp708566768-bb"><span class="identifier">discard_block_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>
  48   <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="discard_block_engine.html#idp708570496-bb"><span class="identifier">discard_block_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>
  49
  50   <span class="comment">// <a class="link" href="discard_block_engine.html#idp708540560-bb">public member functions</a></span>
  51   <span class="keyword">void</span> <a class="link" href="discard_block_engine.html#idp708541120-bb"><span class="identifier">seed</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
  52   <span class="keyword">void</span> <a class="link" href="discard_block_engine.html#idp708542416-bb"><span class="identifier">seed</span></a><span class="special">(</span><span class="identifier">seed_type</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> SeedSeq<span class="special">&gt;</span> <span class="keyword">void</span> <a class="link" href="discard_block_engine.html#idp708544384-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>
  54   <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="discard_block_engine.html#idp708547216-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>
  55   <span class="keyword">const</span> <span class="identifier">base_type</span> <span class="special">&amp;</span> <a class="link" href="discard_block_engine.html#idp708550736-bb"><span class="identifier">base</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
  56   <span class="identifier">result_type</span> <a class="link" href="discard_block_engine.html#idp708552288-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>
  57   <span class="keyword">void</span> <a class="link" href="discard_block_engine.html#idp708553584-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>
  58   <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="discard_block_engine.html#idp708555120-bb"><span class="identifier">generate</span></a><span class="special">(</span><span class="identifier">It</span><span class="special">,</span> <span class="identifier">It</span><span class="special">)</span><span class="special">;</span>
  59
  60   <span class="comment">// <a class="link" href="discard_block_engine.html#idp708574208-bb">public static functions</a></span>
  61   <span class="keyword">static</span> <span class="identifier">result_type</span> <a class="link" href="discard_block_engine.html#idp708574768-bb"><span class="identifier">min</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
  62   <span class="keyword">static</span> <span class="identifier">result_type</span> <a class="link" href="discard_block_engine.html#idp708576416-bb"><span class="identifier">max</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
  63
  64   <span class="comment">// <a class="link" href="discard_block_engine.html#idp708578208-bb">friend functions</a></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_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>
  67     <a class="link" href="discard_block_engine.html#idp708578768-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>
  68                <span class="keyword">const</span> <a class="link" href="discard_block_engine.html" title="Class template discard_block_engine">discard_block_engine</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  69   <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>
  70     <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>
  71     <a class="link" href="discard_block_engine.html#idp708584496-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> <a class="link" href="discard_block_engine.html" title="Class template discard_block_engine">discard_block_engine</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  72   <span class="keyword">friend</span> <span class="keyword">bool</span> <a class="link" href="discard_block_engine.html#idp708590064-bb"><span class="keyword">operator</span><span class="special">==</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="discard_block_engine.html" title="Class template discard_block_engine">discard_block_engine</a> <span class="special">&amp;</span><span class="special">,</span>
  73                          <span class="keyword">const</span> <a class="link" href="discard_block_engine.html" title="Class template discard_block_engine">discard_block_engine</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  74   <span class="keyword">friend</span> <span class="keyword">bool</span> <a class="link" href="discard_block_engine.html#idp708593648-bb"><span class="keyword">operator</span><span class="special">!=</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="discard_block_engine.html" title="Class template discard_block_engine">discard_block_engine</a> <span class="special">&amp;</span><span class="special">,</span>
  75                          <span class="keyword">const</span> <a class="link" href="discard_block_engine.html" title="Class template discard_block_engine">discard_block_engine</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  76
  77   <span class="comment">// public data members</span>
  78   <span class="keyword">static</span> <span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">block_size</span><span class="special">;</span>
  79   <span class="keyword">static</span> <span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">used_block</span><span class="special">;</span>
  80   <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>
  81   <span class="keyword">static</span> <span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">total_block</span><span class="special">;</span>
  82   <span class="keyword">static</span> <span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">returned_block</span><span class="special">;</span>
  83 <span class="special">}</span><span class="special">;</span></pre></div>
  84 <div class="refsect1">
  85 <a name="idp491870704"></a><h2>Description</h2>
  86 <p>The class template <a class="link" href="discard_block_engine.html" title="Class template discard_block_engine">discard_block_engine</a>  is a model of  <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 modifies another generator by discarding parts of its output. Out of every block of <code class="computeroutput">p</code> results, the first <code class="computeroutput">r</code> will be returned and the rest discarded.</p>
  87 <p>Requires: 0 &lt; p &lt;= r </p>
  88 <div class="refsect2">
  89 <a name="idp491875040"></a><h3>
  90 <a name="boost.random.discard_block_engineconstruct-copy-destruct"></a><code class="computeroutput">discard_block_engine</code>
  91         public
  92        construct/copy/destruct</h3>
  93 <div class="orderedlist"><ol class="orderedlist" type="1">
  94 <li class="listitem">
  95 <pre class="literallayout"><a name="idp708558352-bb"></a><span class="identifier">discard_block_engine</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre>
  96 <p>Uses the default seed for the base generator. </p>
  97 </li>
  98 <li class="listitem">
  99 <pre class="literallayout"><span class="keyword">explicit</span> <a name="idp708559088-bb"></a><span class="identifier">discard_block_engine</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">base_type</span> <span class="special">&amp;</span> rng<span class="special">)</span><span class="special">;</span></pre>
 100 <p>Constructs a new <code class="computeroutput"><a class="link" href="discard_block_engine.html" title="Class template discard_block_engine">discard_block_engine</a></code>  with a copy of rng. </p>
 101 </li>
 102 <li class="listitem">
 103 <pre class="literallayout"><span class="keyword">explicit</span> <a name="idp708561488-bb"></a><span class="identifier">discard_block_engine</span><span class="special">(</span><span class="identifier">base_type</span> <span class="special">&amp;&amp;</span> rng<span class="special">)</span><span class="special">;</span></pre>
 104 <p>Constructs a new <code class="computeroutput"><a class="link" href="discard_block_engine.html" title="Class template discard_block_engine">discard_block_engine</a></code>  with rng. </p>
 105 </li>
 106 <li class="listitem">
 107 <pre class="literallayout"><span class="keyword">explicit</span> <a name="idp708563888-bb"></a><span class="identifier">discard_block_engine</span><span class="special">(</span><span class="identifier">seed_type</span> value<span class="special">)</span><span class="special">;</span></pre>
 108 <p>Creates a new <code class="computeroutput"><a class="link" href="discard_block_engine.html" title="Class template discard_block_engine">discard_block_engine</a></code>  and seeds the underlying generator with <code class="computeroutput">value</code> </p>
 109 </li>
 110 <li class="listitem">
 111 <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="idp708566768-bb"></a><span class="identifier">discard_block_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>
 112 <p>Creates a new <code class="computeroutput"><a class="link" href="discard_block_engine.html" title="Class template discard_block_engine">discard_block_engine</a></code>  and seeds the underlying generator with <code class="computeroutput">seq</code> </p>
 113 </li>
 114 <li class="listitem">
 115 <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="idp708570496-bb"></a><span class="identifier">discard_block_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>
 116 <p>Creates a new <code class="computeroutput"><a class="link" href="discard_block_engine.html" title="Class template discard_block_engine">discard_block_engine</a></code>  and seeds the underlying generator with first and last. </p>
 117 </li>
 118 </ol></div>
 119 </div>
 120 <div class="refsect2">
 121 <a name="idp491924672"></a><h3>
 122 <a name="idp708540560-bb"></a><code class="computeroutput">discard_block_engine</code> public member functions</h3>
 123 <div class="orderedlist"><ol class="orderedlist" type="1">
 124 <li class="listitem">
 125 <pre class="literallayout"><span class="keyword">void</span> <a name="idp708541120-bb"></a><span class="identifier">seed</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre>
 126 <p>default seeds the underlying generator. </p>
 127 </li>
 128 <li class="listitem">
 129 <pre class="literallayout"><span class="keyword">void</span> <a name="idp708542416-bb"></a><span class="identifier">seed</span><span class="special">(</span><span class="identifier">seed_type</span> s<span class="special">)</span><span class="special">;</span></pre>
 130 <p>Seeds the underlying generator with s. </p>
 131 </li>
 132 <li class="listitem">
 133 <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="idp708544384-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>
 134 <p>Seeds the underlying generator with seq. </p>
 135 </li>
 136 <li class="listitem">
 137 <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="idp708547216-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>
 138 <p>Seeds the underlying generator with first and last. </p>
 139 </li>
 140 <li class="listitem">
 141 <pre class="literallayout"><span class="keyword">const</span> <span class="identifier">base_type</span> <span class="special">&amp;</span> <a name="idp708550736-bb"></a><span class="identifier">base</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
 142 <p>Returns the underlying engine. </p>
 143 </li>
 144 <li class="listitem">
 145 <pre class="literallayout"><span class="identifier">result_type</span> <a name="idp708552288-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>
 146 <p>Returns the next value of the generator. </p>
 147 </li>
 148 <li class="listitem"><pre class="literallayout"><span class="keyword">void</span> <a name="idp708553584-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></li>
 149 <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> <span class="keyword">void</span> <a name="idp708555120-bb"></a><span class="identifier">generate</span><span class="special">(</span><span class="identifier">It</span> first<span class="special">,</span> <span class="identifier">It</span> last<span class="special">)</span><span class="special">;</span></pre></li>
 150 </ol></div>
 151 </div>
 152 <div class="refsect2">
 153 <a name="idp491982368"></a><h3>
 154 <a name="idp708574208-bb"></a><code class="computeroutput">discard_block_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="idp708574768-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. This is the same as the minimum of the underlying generator. </p>
 159 </li>
 160 <li class="listitem">
 161 <pre class="literallayout"><span class="keyword">static</span> <span class="identifier">result_type</span> <a name="idp708576416-bb"></a><span class="identifier">max</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre>
 162 <p>Returns the largest value that the generator can produce. This is the same as the maximum of the underlying generator. </p>
 163 </li>
 164 </ol></div>
 165 </div>
 166 <div class="refsect2">
 167 <a name="idp491995200"></a><h3>
 168 <a name="idp708578208-bb"></a><code class="computeroutput">discard_block_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="idp708578768-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="discard_block_engine.html" title="Class template discard_block_engine">discard_block_engine</a> <span class="special">&amp;</span> s<span class="special">)</span><span class="special">;</span></pre>
 175 <p>Writes a <code class="computeroutput"><a class="link" href="discard_block_engine.html" title="Class template discard_block_engine">discard_block_engine</a></code>  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="idp708584496-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              <a class="link" href="discard_block_engine.html" title="Class template discard_block_engine">discard_block_engine</a> <span class="special">&amp;</span> s<span class="special">)</span><span class="special">;</span></pre>
 182 <p>Reads a <code class="computeroutput"><a class="link" href="discard_block_engine.html" title="Class template discard_block_engine">discard_block_engine</a></code>  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="idp708590064-bb"></a><span class="keyword">operator</span><span class="special">==</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="discard_block_engine.html" title="Class template discard_block_engine">discard_block_engine</a> <span class="special">&amp;</span> x<span class="special">,</span>
 186                        <span class="keyword">const</span> <a class="link" href="discard_block_engine.html" title="Class template discard_block_engine">discard_block_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. </p>
 188 </li>
 189 <li class="listitem">
 190 <pre class="literallayout"><span class="keyword">friend</span> <span class="keyword">bool</span> <a name="idp708593648-bb"></a><span class="keyword">operator</span><span class="special">!=</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="discard_block_engine.html" title="Class template discard_block_engine">discard_block_engine</a> <span class="special">&amp;</span> x<span class="special">,</span>
 191                        <span class="keyword">const</span> <a class="link" href="discard_block_engine.html" title="Class template discard_block_engine">discard_block_engine</a> <span class="special">&amp;</span> y<span class="special">)</span><span class="special">;</span></pre>
 192 <p>Returns true if the two generators will produce different sequences. </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>
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