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<title>Class template discard_block</title>
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<a name="boost.random.discard_block"></a><div class="titlepage"></div>
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<h2><span class="refentrytitle">Class template discard_block</span></h2>
<p>boost::random::discard_block</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: &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;
</span><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> UniformRandomNumberGenerator<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> r<span class="special">&gt;</span>
<span class="keyword">class</span> <a class="link" href="discard_block.html" title="Class template discard_block">discard_block</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">UniformRandomNumberGenerator</span> <a name="boost.random.discard_block.base_type"></a><span class="identifier">base_type</span><span class="special">;</span>
<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.result_type"></a><span class="identifier">result_type</span><span class="special">;</span>
<span class="comment">// <a class="link" href="discard_block.html#boost.random.discard_blockconstruct-copy-destruct">construct/copy/destruct</a></span>
<a class="link" href="discard_block.html#id1143762-bb"><span class="identifier">discard_block</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
<a class="link" href="discard_block.html#id1143763-bb"><span class="identifier">discard_block</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>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <a class="link" href="discard_block.html#id1143770-bb"><span class="identifier">discard_block</span></a><span class="special">(</span><span class="identifier">T</span><span class="special">)</span><span class="special">;</span>
<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.html#id1143783-bb"><span class="identifier">discard_block</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>
<span class="comment">// <a class="link" href="discard_block.html#id1143673-bb">public member functions</a></span>
<span class="keyword">void</span> <a class="link" href="discard_block.html#id1143677-bb"><span class="identifier">seed</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="keyword">void</span> <a class="link" href="discard_block.html#id1143684-bb"><span class="identifier">seed</span></a><span class="special">(</span><span class="identifier">T</span><span class="special">)</span><span class="special">;</span>
<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.html#id1143705-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>
<span class="keyword">const</span> <span class="identifier">base_type</span> <span class="special">&amp;</span> <a class="link" href="discard_block.html#id1143730-bb"><span class="identifier">base</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="discard_block.html#id1143738-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="discard_block.html#id1143746-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="discard_block.html#id1143754-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="discard_block.html#id1143802-bb">public static functions</a></span>
<span class="keyword">static</span> <span class="keyword">bool</span> <a class="link" href="discard_block.html#id1143806-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">unsigned</span> <span class="keyword">int</span> total_block<span class="special">;</span>
<span class="keyword">static</span> <span class="keyword">const</span> <span class="keyword">unsigned</span> <span class="keyword">int</span> returned_block<span class="special">;</span>
<span class="special">}</span><span class="special">;</span></pre></div>
<div class="refsect1">
<a name="id2482300"></a><h2>Description</h2>
<p>The class template <a class="link" href="discard_block.html" title="Class template discard_block">discard_block</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">r</code> results, the first <code class="computeroutput">p</code> will be returned and the rest discarded.</p>
<p>Requires: 0 &lt; p &lt;= r </p>
<div class="refsect2">
<a name="id2482339"></a><h3>
<a name="boost.random.discard_blockconstruct-copy-destruct"></a><code class="computeroutput">discard_block</code>
public
construct/copy/destruct</h3>
<div class="orderedlist"><ol class="orderedlist" type="1">
<li class="listitem"><pre class="literallayout"><a name="id1143762-bb"></a><span class="identifier">discard_block</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre></li>
<li class="listitem"><pre class="literallayout"><a name="id1143763-bb"></a><span class="identifier">discard_block</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></li>
<li class="listitem"><pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <a name="id1143770-bb"></a><span class="identifier">discard_block</span><span class="special">(</span><span class="identifier">T</span> s<span class="special">)</span><span class="special">;</span></pre></li>
<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="id1143783-bb"></a><span class="identifier">discard_block</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>
</ol></div>
</div>
<div class="refsect2">
<a name="id2482560"></a><h3>
<a name="id1143673-bb"></a><code class="computeroutput">discard_block</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="id1143677-bb"></a><span class="identifier">seed</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre></li>
<li class="listitem"><pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="keyword">void</span> <a name="id1143684-bb"></a><span class="identifier">seed</span><span class="special">(</span><span class="identifier">T</span> s<span class="special">)</span><span class="special">;</span></pre></li>
<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="id1143705-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></li>
<li class="listitem"><pre class="literallayout"><span class="keyword">const</span> <span class="identifier">base_type</span> <span class="special">&amp;</span> <a name="id1143730-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></li>
<li class="listitem"><pre class="literallayout"><span class="identifier">result_type</span> <a name="id1143738-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></li>
<li class="listitem"><pre class="literallayout"><span class="identifier">result_type</span> <a name="id1143746-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></li>
<li class="listitem"><pre class="literallayout"><span class="identifier">result_type</span> <a name="id1143754-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></li>
</ol></div>
</div>
<div class="refsect2">
<a name="id2482924"></a><h3>
<a name="id1143802-bb"></a><code class="computeroutput">discard_block</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="id1143806-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>
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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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