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<title>libstdc++: std::discard_block_engine< _RandomNumberEngine, __p, __r > Class Template Reference</title>
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<div class="title">std::discard_block_engine< _RandomNumberEngine, __p, __r > Class Template Reference<div class="ingroups"><a class="el" href="a01473.html">Numerics</a> » <a class="el" href="a01491.html">Random Number Generation</a> » <a class="el" href="a01531.html">Random Number Generators</a></div></div> </div>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-types"></a>
Public Types</h2></td></tr>
<tr class="memitem:af97ea43c5fbacbc2f8f8296336d946dd"><td class="memItemLeft" align="right" valign="top">typedef _RandomNumberEngine::result_type </td><td class="memItemRight" valign="bottom"><a class="el" href="a06280.html#af97ea43c5fbacbc2f8f8296336d946dd">result_type</a></td></tr>
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Public Member Functions</h2></td></tr>
<tr class="memitem:aa4197a4ae6f9057e0473bdea26087a42"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="a06280.html#aa4197a4ae6f9057e0473bdea26087a42">discard_block_engine</a> ()</td></tr>
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<tr class="memitem:a2fbd9faf2b21da3be4d307608020e93c"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="a06280.html#a2fbd9faf2b21da3be4d307608020e93c">discard_block_engine</a> (const _RandomNumberEngine &__rng)</td></tr>
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<tr class="memitem:a5b10975e19ab0b41895b72b59acb3f47"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="a06280.html#a5b10975e19ab0b41895b72b59acb3f47">discard_block_engine</a> (_RandomNumberEngine &&__rng)</td></tr>
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<tr class="memitem:af23cfe2cdaf2fd6146ac3f99806d64f0"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="a06280.html#af23cfe2cdaf2fd6146ac3f99806d64f0">discard_block_engine</a> (<a class="el" href="a06280.html#af97ea43c5fbacbc2f8f8296336d946dd">result_type</a> __s)</td></tr>
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<tr class="memitem:ab4c425df46f55cbd80745d0ebaf8cacd"><td class="memTemplParams" colspan="2">template<typename _Sseq , typename = typename std::enable_if<!std::is_same<_Sseq, discard_block_engine>::value && !std::is_same<_Sseq, _RandomNumberEngine>::value> ::type> </td></tr>
<tr class="memitem:ab4c425df46f55cbd80745d0ebaf8cacd"><td class="memTemplItemLeft" align="right" valign="top"> </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a06280.html#ab4c425df46f55cbd80745d0ebaf8cacd">discard_block_engine</a> (_Sseq &__q)</td></tr>
<tr class="separator:ab4c425df46f55cbd80745d0ebaf8cacd"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a290971f91c2edf0a02d19e93fa240516"><td class="memItemLeft" align="right" valign="top">const _RandomNumberEngine & </td><td class="memItemRight" valign="bottom"><a class="el" href="a06280.html#a290971f91c2edf0a02d19e93fa240516">base</a> () const noexcept</td></tr>
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<tr class="memitem:a34ad0ea19451ee1c087351414947c190"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="a06280.html#a34ad0ea19451ee1c087351414947c190">discard</a> (unsigned long long __z)</td></tr>
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<tr class="memitem:ab96a2de7f6360a7fc295a0d03f0dfd2e"><td class="memItemLeft" align="right" valign="top"><a class="el" href="a06280.html#af97ea43c5fbacbc2f8f8296336d946dd">result_type</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a06280.html#ab96a2de7f6360a7fc295a0d03f0dfd2e">operator()</a> ()</td></tr>
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<tr class="memitem:a271b3af14e42c8d2eb9df443916b3e84"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="a06280.html#a271b3af14e42c8d2eb9df443916b3e84">seed</a> ()</td></tr>
<tr class="separator:a271b3af14e42c8d2eb9df443916b3e84"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a0bbf8d919762d77cdb63f350a77c3853"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="a06280.html#a0bbf8d919762d77cdb63f350a77c3853">seed</a> (<a class="el" href="a06280.html#af97ea43c5fbacbc2f8f8296336d946dd">result_type</a> __s)</td></tr>
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<tr class="memitem:aa2535c04838c633a81e1cf05a665cf91"><td class="memTemplParams" colspan="2">template<typename _Sseq > </td></tr>
<tr class="memitem:aa2535c04838c633a81e1cf05a665cf91"><td class="memTemplItemLeft" align="right" valign="top">void </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a06280.html#aa2535c04838c633a81e1cf05a665cf91">seed</a> (_Sseq &__q)</td></tr>
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Static Public Member Functions</h2></td></tr>
<tr class="memitem:a9a70eb71021b6dd2b675e158d76833ef"><td class="memItemLeft" align="right" valign="top">static constexpr <a class="el" href="a06280.html#af97ea43c5fbacbc2f8f8296336d946dd">result_type</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a06280.html#a9a70eb71021b6dd2b675e158d76833ef">max</a> ()</td></tr>
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<tr class="memitem:a16286565620fc6966ca53540572ede38"><td class="memItemLeft" align="right" valign="top">static constexpr <a class="el" href="a06280.html#af97ea43c5fbacbc2f8f8296336d946dd">result_type</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a06280.html#a16286565620fc6966ca53540572ede38">min</a> ()</td></tr>
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Static Public Attributes</h2></td></tr>
<tr class="memitem:a09e59866976531a84a71791032d2266f"><td class="memItemLeft" align="right" valign="top"><a id="a09e59866976531a84a71791032d2266f"></a>
static constexpr size_t </td><td class="memItemRight" valign="bottom"><b>block_size</b></td></tr>
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static constexpr size_t </td><td class="memItemRight" valign="bottom"><b>used_block</b></td></tr>
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Friends</h2></td></tr>
<tr class="memitem:acefef9fae1a48c92ebc15b4c930dbf08"><td class="memTemplParams" colspan="2">template<typename _RandomNumberEngine1 , size_t __p1, size_t __r1, typename _CharT , typename _Traits > </td></tr>
<tr class="memitem:acefef9fae1a48c92ebc15b4c930dbf08"><td class="memTemplItemLeft" align="right" valign="top"><a class="el" href="a02460.html">std::basic_ostream</a>< _CharT, _Traits > & </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a06280.html#acefef9fae1a48c92ebc15b4c930dbf08">operator<<</a> (<a class="el" href="a02460.html">std::basic_ostream</a>< _CharT, _Traits > &__os, const <a class="el" href="a06280.html">std::discard_block_engine</a>< _RandomNumberEngine1, __p1, __r1 > &__x)</td></tr>
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<tr class="memitem:aa991a227519aedc1fb7b50798612f94c"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="a06280.html#aa991a227519aedc1fb7b50798612f94c">operator==</a> (const <a class="el" href="a06280.html">discard_block_engine</a> &__lhs, const <a class="el" href="a06280.html">discard_block_engine</a> &__rhs)</td></tr>
<tr class="separator:aa991a227519aedc1fb7b50798612f94c"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a47191ff90d26d583cadb261b7de61c1d"><td class="memTemplParams" colspan="2">template<typename _RandomNumberEngine1 , size_t __p1, size_t __r1, typename _CharT , typename _Traits > </td></tr>
<tr class="memitem:a47191ff90d26d583cadb261b7de61c1d"><td class="memTemplItemLeft" align="right" valign="top"><a class="el" href="a02456.html">std::basic_istream</a>< _CharT, _Traits > & </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a06280.html#a47191ff90d26d583cadb261b7de61c1d">operator>></a> (<a class="el" href="a02456.html">std::basic_istream</a>< _CharT, _Traits > &__is, <a class="el" href="a06280.html">std::discard_block_engine</a>< _RandomNumberEngine1, __p1, __r1 > &__x)</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><h3>template<typename _RandomNumberEngine, size_t __p, size_t __r><br />
class std::discard_block_engine< _RandomNumberEngine, __p, __r ></h3>
<p>Produces random numbers from some base engine by discarding blocks of data.</p>
<p>0 <= <code>__r</code> <= <code>__p</code> </p>
<p class="definition">Definition at line <a class="el" href="a00452_source.html#l00839">839</a> of file <a class="el" href="a00452_source.html">random.h</a>.</p>
</div><h2 class="groupheader">Member Typedef Documentation</h2>
<a id="af97ea43c5fbacbc2f8f8296336d946dd"></a>
<h2 class="memtitle"><span class="permalink"><a href="#af97ea43c5fbacbc2f8f8296336d946dd">◆ </a></span>result_type</h2>
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template<typename _RandomNumberEngine, size_t __p, size_t __r> </div>
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<td class="memname">typedef _RandomNumberEngine::result_type <a class="el" href="a06280.html">std::discard_block_engine</a>< _RandomNumberEngine, __p, __r >::<a class="el" href="a06280.html#af97ea43c5fbacbc2f8f8296336d946dd">result_type</a></td>
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<p>The type of the generated random value. </p>
<p class="definition">Definition at line <a class="el" href="a00452_source.html#l00842">842</a> of file <a class="el" href="a00452_source.html">random.h</a>.</p>
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<h2 class="groupheader">Constructor & Destructor Documentation</h2>
<a id="aa4197a4ae6f9057e0473bdea26087a42"></a>
<h2 class="memtitle"><span class="permalink"><a href="#aa4197a4ae6f9057e0473bdea26087a42">◆ </a></span>discard_block_engine() <span class="overload">[1/5]</span></h2>
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template<typename _RandomNumberEngine, size_t __p, size_t __r> </div>
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<p>Constructs a default discard_block_engine engine. </p>
<p>The underlying engine is default constructed as well. </p>
<p class="definition">Definition at line <a class="el" href="a00452_source.html#l00857">857</a> of file <a class="el" href="a00452_source.html">random.h</a>.</p>
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template<typename _RandomNumberEngine, size_t __p, size_t __r> </div>
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<td>(</td>
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<p>Copy constructs a discard_block_engine engine. </p>
<p>Copies an existing base class random number generator. </p><dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">__rng</td><td>An existing (base class) engine object. </td></tr>
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<p class="definition">Definition at line <a class="el" href="a00452_source.html#l00867">867</a> of file <a class="el" href="a00452_source.html">random.h</a>.</p>
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<p>Move constructs a discard_block_engine engine. </p>
<p>Copies an existing base class random number generator. </p><dl class="params"><dt>Parameters</dt><dd>
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<p class="definition">Definition at line <a class="el" href="a00452_source.html#l00877">877</a> of file <a class="el" href="a00452_source.html">random.h</a>.</p>
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<td>(</td>
<td class="paramtype"><a class="el" href="a06280.html#af97ea43c5fbacbc2f8f8296336d946dd">result_type</a> </td>
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<p>Seed constructs a discard_block_engine engine. </p>
<p>Constructs the underlying generator engine seeded with <code>__s</code>. </p><dl class="params"><dt>Parameters</dt><dd>
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<p class="definition">Definition at line <a class="el" href="a00452_source.html#l00887">887</a> of file <a class="el" href="a00452_source.html">random.h</a>.</p>
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template<typename _RandomNumberEngine, size_t __p, size_t __r> </div>
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template<typename _Sseq , typename = typename std::enable_if<!std::is_same<_Sseq, discard_block_engine>::value && !std::is_same<_Sseq, _RandomNumberEngine>::value> ::type> </div>
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<td class="memname"><a class="el" href="a06280.html">std::discard_block_engine</a>< _RandomNumberEngine, __p, __r >::<a class="el" href="a06280.html">discard_block_engine</a> </td>
<td>(</td>
<td class="paramtype">_Sseq & </td>
<td class="paramname"><em>__q</em></td><td>)</td>
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<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">explicit</span></span> </td>
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<p>Generator construct a discard_block_engine engine. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">__q</td><td>A seed sequence. </td></tr>
</table>
</dd>
</dl>
<p class="definition">Definition at line <a class="el" href="a00452_source.html#l00900">900</a> of file <a class="el" href="a00452_source.html">random.h</a>.</p>
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<h2 class="groupheader">Member Function Documentation</h2>
<a id="a290971f91c2edf0a02d19e93fa240516"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a290971f91c2edf0a02d19e93fa240516">◆ </a></span>base()</h2>
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<div class="memtemplate">
template<typename _RandomNumberEngine, size_t __p, size_t __r> </div>
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<td class="memname">const _RandomNumberEngine& <a class="el" href="a06280.html">std::discard_block_engine</a>< _RandomNumberEngine, __p, __r >::base </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td> const</td>
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<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">noexcept</span></span> </td>
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<p>Gets a const reference to the underlying generator engine object. </p>
<p class="definition">Definition at line <a class="el" href="a00452_source.html#l00944">944</a> of file <a class="el" href="a00452_source.html">random.h</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a34ad0ea19451ee1c087351414947c190">◆ </a></span>discard()</h2>
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template<typename _RandomNumberEngine, size_t __p, size_t __r> </div>
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<td class="memname">void <a class="el" href="a06280.html">std::discard_block_engine</a>< _RandomNumberEngine, __p, __r >::discard </td>
<td>(</td>
<td class="paramtype">unsigned long long </td>
<td class="paramname"><em>__z</em></td><td>)</td>
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<p>Discard a sequence of random numbers. </p>
<p class="definition">Definition at line <a class="el" href="a00452_source.html#l00965">965</a> of file <a class="el" href="a00452_source.html">random.h</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a9a70eb71021b6dd2b675e158d76833ef">◆ </a></span>max()</h2>
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template<typename _RandomNumberEngine, size_t __p, size_t __r> </div>
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<td class="memname">static constexpr <a class="el" href="a06280.html#af97ea43c5fbacbc2f8f8296336d946dd">result_type</a> <a class="el" href="a06280.html">std::discard_block_engine</a>< _RandomNumberEngine, __p, __r >::max </td>
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<td class="paramname"></td><td>)</td>
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<p>Gets the maximum value in the generated random number range. </p>
<p class="definition">Definition at line <a class="el" href="a00452_source.html#l00958">958</a> of file <a class="el" href="a00452_source.html">random.h</a>.</p>
<p class="reference">References <a class="el" href="a00530_source.html#l00219">std::max()</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a16286565620fc6966ca53540572ede38">◆ </a></span>min()</h2>
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template<typename _RandomNumberEngine, size_t __p, size_t __r> </div>
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<td class="memname">static constexpr <a class="el" href="a06280.html#af97ea43c5fbacbc2f8f8296336d946dd">result_type</a> <a class="el" href="a06280.html">std::discard_block_engine</a>< _RandomNumberEngine, __p, __r >::min </td>
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<td class="paramname"></td><td>)</td>
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<p>Gets the minimum value in the generated random number range. </p>
<p class="definition">Definition at line <a class="el" href="a00452_source.html#l00951">951</a> of file <a class="el" href="a00452_source.html">random.h</a>.</p>
<p class="reference">References <a class="el" href="a00530_source.html#l00195">std::min()</a>.</p>
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<a id="ab96a2de7f6360a7fc295a0d03f0dfd2e"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ab96a2de7f6360a7fc295a0d03f0dfd2e">◆ </a></span>operator()()</h2>
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template<typename _RandomNumberEngine , size_t __p, size_t __r> </div>
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<td class="memname"><a class="el" href="a06280.html">discard_block_engine</a>< _RandomNumberEngine, __p, __r >::<a class="el" href="a06280.html#af97ea43c5fbacbc2f8f8296336d946dd">result_type</a> <a class="el" href="a06280.html">std::discard_block_engine</a>< _RandomNumberEngine, __p, __r >::operator() </td>
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<p>Gets the next value in the generated random number sequence. </p>
<p class="definition">Definition at line <a class="el" href="a17055_source.html#l00685">685</a> of file <a class="el" href="a17055_source.html">bits/random.tcc</a>.</p>
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<a id="a271b3af14e42c8d2eb9df443916b3e84"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a271b3af14e42c8d2eb9df443916b3e84">◆ </a></span>seed() <span class="overload">[1/3]</span></h2>
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template<typename _RandomNumberEngine, size_t __p, size_t __r> </div>
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<td class="memname">void <a class="el" href="a06280.html">std::discard_block_engine</a>< _RandomNumberEngine, __p, __r >::seed </td>
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<p>Reseeds the discard_block_engine object with the default seed for the underlying base class generator engine. </p>
<p class="definition">Definition at line <a class="el" href="a00452_source.html#l00909">909</a> of file <a class="el" href="a00452_source.html">random.h</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a0bbf8d919762d77cdb63f350a77c3853">◆ </a></span>seed() <span class="overload">[2/3]</span></h2>
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template<typename _RandomNumberEngine, size_t __p, size_t __r> </div>
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<td class="memname">void <a class="el" href="a06280.html">std::discard_block_engine</a>< _RandomNumberEngine, __p, __r >::seed </td>
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<td class="paramtype"><a class="el" href="a06280.html#af97ea43c5fbacbc2f8f8296336d946dd">result_type</a> </td>
<td class="paramname"><em>__s</em></td><td>)</td>
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<p>Reseeds the discard_block_engine object with the default seed for the underlying base class generator engine. </p>
<p class="definition">Definition at line <a class="el" href="a00452_source.html#l00920">920</a> of file <a class="el" href="a00452_source.html">random.h</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#aa2535c04838c633a81e1cf05a665cf91">◆ </a></span>seed() <span class="overload">[3/3]</span></h2>
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template<typename _RandomNumberEngine, size_t __p, size_t __r> </div>
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template<typename _Sseq > </div>
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<td class="memname">void <a class="el" href="a06280.html">std::discard_block_engine</a>< _RandomNumberEngine, __p, __r >::seed </td>
<td>(</td>
<td class="paramtype">_Sseq & </td>
<td class="paramname"><em>__q</em></td><td>)</td>
<td></td>
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<p>Reseeds the discard_block_engine object with the given seed sequence. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">__q</td><td>A seed generator function. </td></tr>
</table>
</dd>
</dl>
<p class="definition">Definition at line <a class="el" href="a00452_source.html#l00933">933</a> of file <a class="el" href="a00452_source.html">random.h</a>.</p>
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<h2 class="groupheader">Friends And Related Function Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#acefef9fae1a48c92ebc15b4c930dbf08">◆ </a></span>operator<<</h2>
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template<typename _RandomNumberEngine, size_t __p, size_t __r> </div>
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template<typename _RandomNumberEngine1 , size_t __p1, size_t __r1, typename _CharT , typename _Traits > </div>
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<td class="memname"><a class="el" href="a02460.html">std::basic_ostream</a><_CharT, _Traits>& operator<< </td>
<td>(</td>
<td class="paramtype"><a class="el" href="a02460.html">std::basic_ostream</a>< _CharT, _Traits > & </td>
<td class="paramname"><em>__os</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">const <a class="el" href="a06280.html">std::discard_block_engine</a>< _RandomNumberEngine1, __p1, __r1 > & </td>
<td class="paramname"><em>__x</em> </td>
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<td></td><td></td>
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<span class="mlabels"><span class="mlabel">friend</span></span> </td>
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<p>Inserts the current state of a discard_block_engine random number generator engine <code>__x</code> into the output stream <code>__os</code>. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">__os</td><td>An output stream. </td></tr>
<tr><td class="paramname">__x</td><td>A discard_block_engine random number generator engine.</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The output stream with the state of <code>__x</code> inserted or in an error state. </dd></dl>
</div>
</div>
<a id="aa991a227519aedc1fb7b50798612f94c"></a>
<h2 class="memtitle"><span class="permalink"><a href="#aa991a227519aedc1fb7b50798612f94c">◆ </a></span>operator==</h2>
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<div class="memtemplate">
template<typename _RandomNumberEngine, size_t __p, size_t __r> </div>
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<td class="memname">bool operator== </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="a06280.html">discard_block_engine</a>< _RandomNumberEngine, __p, __r > & </td>
<td class="paramname"><em>__lhs</em>, </td>
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<td></td>
<td class="paramtype">const <a class="el" href="a06280.html">discard_block_engine</a>< _RandomNumberEngine, __p, __r > & </td>
<td class="paramname"><em>__rhs</em> </td>
</tr>
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<td></td>
<td>)</td>
<td></td><td></td>
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<span class="mlabels"><span class="mlabel">friend</span></span> </td>
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<p>Compares two discard_block_engine random number generator objects of the same type for equality. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">__lhs</td><td>A discard_block_engine random number generator object. </td></tr>
<tr><td class="paramname">__rhs</td><td>Another discard_block_engine random number generator object.</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>true if the infinite sequences of generated values would be equal, false otherwise. </dd></dl>
<p class="definition">Definition at line <a class="el" href="a00452_source.html#l00989">989</a> of file <a class="el" href="a00452_source.html">random.h</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a47191ff90d26d583cadb261b7de61c1d">◆ </a></span>operator>></h2>
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template<typename _RandomNumberEngine, size_t __p, size_t __r> </div>
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template<typename _RandomNumberEngine1 , size_t __p1, size_t __r1, typename _CharT , typename _Traits > </div>
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<td class="memname"><a class="el" href="a02456.html">std::basic_istream</a><_CharT, _Traits>& operator>> </td>
<td>(</td>
<td class="paramtype"><a class="el" href="a02456.html">std::basic_istream</a>< _CharT, _Traits > & </td>
<td class="paramname"><em>__is</em>, </td>
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<td class="paramtype"><a class="el" href="a06280.html">std::discard_block_engine</a>< _RandomNumberEngine1, __p1, __r1 > & </td>
<td class="paramname"><em>__x</em> </td>
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<td></td>
<td>)</td>
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<p>Extracts the current state of a % subtract_with_carry_engine random number generator engine <code>__x</code> from the input stream <code>__is</code>. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">__is</td><td>An input stream. </td></tr>
<tr><td class="paramname">__x</td><td>A discard_block_engine random number generator engine.</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The input stream with the state of <code>__x</code> extracted or in an error state. </dd></dl>
</div>
</div>
<hr/>The documentation for this class was generated from the following files:<ul>
<li><a class="el" href="a00452_source.html">random.h</a></li>
<li><a class="el" href="a17055_source.html">bits/random.tcc</a></li>
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