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<title>libstdc++: std::independent_bits_engine< _RandomNumberEngine, __w, _UIntType > Class Template Reference</title>
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<div class="title">std::independent_bits_engine< _RandomNumberEngine, __w, _UIntType > Class Template Reference<div class="ingroups"><a class="el" href="a01476.html">Numerics</a> » <a class="el" href="a01494.html">Random Number Generation</a> » <a class="el" href="a01534.html">Random Number Generators</a></div></div> </div>
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<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-types"></a>
Public Types</h2></td></tr>
<tr class="memitem:a8548a254ad408b901f446f84fc1c47b8"><td class="memItemLeft" align="right" valign="top">typedef _UIntType </td><td class="memItemRight" valign="bottom"><a class="el" href="a06287.html#a8548a254ad408b901f446f84fc1c47b8">result_type</a></td></tr>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr class="memitem:ac39fb77deb769d85123ece7b6c981c8f"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="a06287.html#ac39fb77deb769d85123ece7b6c981c8f">independent_bits_engine</a> ()</td></tr>
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<tr class="memitem:a4d92ca47578567e9465b90b6461acb39"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="a06287.html#a4d92ca47578567e9465b90b6461acb39">independent_bits_engine</a> (const _RandomNumberEngine &__rng)</td></tr>
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<tr class="memitem:ae6b9f2ddf321e24e8bae7edd6f4c2e7d"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="a06287.html#ae6b9f2ddf321e24e8bae7edd6f4c2e7d">independent_bits_engine</a> (_RandomNumberEngine &&__rng)</td></tr>
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<tr class="memitem:ad54d8549b7e6e4f9908486383d543efa"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="a06287.html#ad54d8549b7e6e4f9908486383d543efa">independent_bits_engine</a> (<a class="el" href="a06287.html#a8548a254ad408b901f446f84fc1c47b8">result_type</a> __s)</td></tr>
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<tr class="memitem:a1b27f8236f8a90380ea7fab8a3014d90"><td class="memTemplParams" colspan="2">template<typename _Sseq , typename = typename std::enable_if<!std::is_same<_Sseq, independent_bits_engine>::value && !std::is_same<_Sseq, _RandomNumberEngine>::value> ::type> </td></tr>
<tr class="memitem:a1b27f8236f8a90380ea7fab8a3014d90"><td class="memTemplItemLeft" align="right" valign="top"> </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a06287.html#a1b27f8236f8a90380ea7fab8a3014d90">independent_bits_engine</a> (_Sseq &__q)</td></tr>
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<tr class="memitem:aac9a880b6296be8440a764a4b682e724"><td class="memItemLeft" align="right" valign="top">const _RandomNumberEngine & </td><td class="memItemRight" valign="bottom"><a class="el" href="a06287.html#aac9a880b6296be8440a764a4b682e724">base</a> () const noexcept</td></tr>
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<tr class="memitem:a80e7c314ddc6fd4cf54a5f720e89801a"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="a06287.html#a80e7c314ddc6fd4cf54a5f720e89801a">discard</a> (unsigned long long __z)</td></tr>
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<tr class="memitem:a68700cdbf6e7f53faa2cf86baf96d142"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="a06287.html#a68700cdbf6e7f53faa2cf86baf96d142">seed</a> ()</td></tr>
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<tr class="memitem:a9d04c347df4ab52e8c1b8e6ab3a547de"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="a06287.html#a9d04c347df4ab52e8c1b8e6ab3a547de">seed</a> (<a class="el" href="a06287.html#a8548a254ad408b901f446f84fc1c47b8">result_type</a> __s)</td></tr>
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<tr class="memitem:ac30522e2c0d83fd776f91312603a3f5f"><td class="memTemplParams" colspan="2">template<typename _Sseq > </td></tr>
<tr class="memitem:ac30522e2c0d83fd776f91312603a3f5f"><td class="memTemplItemLeft" align="right" valign="top">void </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a06287.html#ac30522e2c0d83fd776f91312603a3f5f">seed</a> (_Sseq &__q)</td></tr>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-static-methods"></a>
Static Public Member Functions</h2></td></tr>
<tr class="memitem:abf1815a0f69ac213aeeac81d614371e2"><td class="memItemLeft" align="right" valign="top">static constexpr <a class="el" href="a06287.html#a8548a254ad408b901f446f84fc1c47b8">result_type</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a06287.html#abf1815a0f69ac213aeeac81d614371e2">max</a> ()</td></tr>
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<tr class="memitem:a5900ce9b2214d848cce14cb82ce71397"><td class="memItemLeft" align="right" valign="top">static constexpr <a class="el" href="a06287.html#a8548a254ad408b901f446f84fc1c47b8">result_type</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a06287.html#a5900ce9b2214d848cce14cb82ce71397">min</a> ()</td></tr>
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Friends</h2></td></tr>
<tr class="memitem:ab5791f2acb5c5700ef1e339bfc166d89"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="a06287.html#ab5791f2acb5c5700ef1e339bfc166d89">operator==</a> (const <a class="el" href="a06287.html">independent_bits_engine</a> &__lhs, const <a class="el" href="a06287.html">independent_bits_engine</a> &__rhs)</td></tr>
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<tr class="memitem:a13e9be7110a9e32004584ac71de9190f"><td class="memTemplParams" colspan="2">template<typename _CharT , typename _Traits > </td></tr>
<tr class="memitem:a13e9be7110a9e32004584ac71de9190f"><td class="memTemplItemLeft" align="right" valign="top"><a class="el" href="a02459.html">std::basic_istream</a>< _CharT, _Traits > & </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a06287.html#a13e9be7110a9e32004584ac71de9190f">operator>></a> (<a class="el" href="a02459.html">std::basic_istream</a>< _CharT, _Traits > &__is, <a class="el" href="a06287.html">std::independent_bits_engine</a>< _RandomNumberEngine, __w, _UIntType > &__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 __w, typename _UIntType><br />
class std::independent_bits_engine< _RandomNumberEngine, __w, _UIntType ></h3>
<p>Produces random numbers by combining random numbers from some base engine to produce random numbers with a specifies number of bits <code>__w</code>. </p>
<p class="definition">Definition at line <a class="el" href="a00452_source.html#l01059">1059</a> of file <a class="el" href="a00452_source.html">random.h</a>.</p>
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template<typename _RandomNumberEngine, size_t __w, typename _UIntType> </div>
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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#l01062">1062</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>
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template<typename _RandomNumberEngine, size_t __w, typename _UIntType> </div>
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<p>Constructs a default independent_bits_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#l01075">1075</a> of file <a class="el" href="a00452_source.html">random.h</a>.</p>
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template<typename _RandomNumberEngine, size_t __w, typename _UIntType> </div>
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<td>(</td>
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<p>Copy constructs a independent_bits_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#l01085">1085</a> of file <a class="el" href="a00452_source.html">random.h</a>.</p>
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<p>Move constructs a independent_bits_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#l01095">1095</a> of file <a class="el" href="a00452_source.html">random.h</a>.</p>
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<td>(</td>
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<p>Seed constructs a independent_bits_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#l01105">1105</a> of file <a class="el" href="a00452_source.html">random.h</a>.</p>
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template<typename _Sseq , typename = typename std::enable_if<!std::is_same<_Sseq, independent_bits_engine>::value && !std::is_same<_Sseq, _RandomNumberEngine>::value> ::type> </div>
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<p>Generator construct a independent_bits_engine engine. </p>
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<p class="definition">Definition at line <a class="el" href="a00452_source.html#l01118">1118</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>
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<h2 class="memtitle"><span class="permalink"><a href="#aac9a880b6296be8440a764a4b682e724">◆ </a></span>base()</h2>
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template<typename _RandomNumberEngine, size_t __w, typename _UIntType> </div>
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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#l01153">1153</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="#a80e7c314ddc6fd4cf54a5f720e89801a">◆ </a></span>discard()</h2>
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template<typename _RandomNumberEngine, size_t __w, typename _UIntType> </div>
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<td class="memname">void <a class="el" href="a06287.html">std::independent_bits_engine</a>< _RandomNumberEngine, __w, _UIntType >::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#l01174">1174</a> of file <a class="el" href="a00452_source.html">random.h</a>.</p>
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<a id="abf1815a0f69ac213aeeac81d614371e2"></a>
<h2 class="memtitle"><span class="permalink"><a href="#abf1815a0f69ac213aeeac81d614371e2">◆ </a></span>max()</h2>
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<div class="memtemplate">
template<typename _RandomNumberEngine, size_t __w, typename _UIntType> </div>
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<td class="memname">static constexpr <a class="el" href="a06287.html#a8548a254ad408b901f446f84fc1c47b8">result_type</a> <a class="el" href="a06287.html">std::independent_bits_engine</a>< _RandomNumberEngine, __w, _UIntType >::max </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
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<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">static</span></span> </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#l01167">1167</a> of file <a class="el" href="a00452_source.html">random.h</a>.</p>
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<a id="a5900ce9b2214d848cce14cb82ce71397"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a5900ce9b2214d848cce14cb82ce71397">◆ </a></span>min()</h2>
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<div class="memtemplate">
template<typename _RandomNumberEngine, size_t __w, typename _UIntType> </div>
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<td class="memname">static constexpr <a class="el" href="a06287.html#a8548a254ad408b901f446f84fc1c47b8">result_type</a> <a class="el" href="a06287.html">std::independent_bits_engine</a>< _RandomNumberEngine, __w, _UIntType >::min </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
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<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">static</span></span> </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#l01160">1160</a> of file <a class="el" href="a00452_source.html">random.h</a>.</p>
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<a id="a61bc80ca1745e63a5f22307498737844"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a61bc80ca1745e63a5f22307498737844">◆ </a></span>operator()()</h2>
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<div class="memproto">
<div class="memtemplate">
template<typename _RandomNumberEngine , size_t __w, typename _UIntType > </div>
<table class="memname">
<tr>
<td class="memname"><a class="el" href="a06287.html">independent_bits_engine</a>< _RandomNumberEngine, __w, _UIntType >::<a class="el" href="a06287.html#a8548a254ad408b901f446f84fc1c47b8">result_type</a> <a class="el" href="a06287.html">std::independent_bits_engine</a>< _RandomNumberEngine, __w, _UIntType >::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="a17058_source.html#l00742">742</a> of file <a class="el" href="a17058_source.html">bits/random.tcc</a>.</p>
<p class="reference">References <a class="el" href="a00530_source.html#l01000">std::__lg()</a>, <a class="el" href="a00095_source.html#l00321">std::numeric_limits< _Tp >::max()</a>, and <a class="el" href="a00095_source.html#l00317">std::numeric_limits< _Tp >::min()</a>.</p>
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<a id="a68700cdbf6e7f53faa2cf86baf96d142"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a68700cdbf6e7f53faa2cf86baf96d142">◆ </a></span>seed() <span class="overload">[1/3]</span></h2>
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<div class="memproto">
<div class="memtemplate">
template<typename _RandomNumberEngine, size_t __w, typename _UIntType> </div>
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<td class="memname">void <a class="el" href="a06287.html">std::independent_bits_engine</a>< _RandomNumberEngine, __w, _UIntType >::seed </td>
<td>(</td>
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<span class="mlabels"><span class="mlabel">inline</span></span> </td>
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<p>Reseeds the independent_bits_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#l01127">1127</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="#a9d04c347df4ab52e8c1b8e6ab3a547de">◆ </a></span>seed() <span class="overload">[2/3]</span></h2>
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template<typename _RandomNumberEngine, size_t __w, typename _UIntType> </div>
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<td class="memname">void <a class="el" href="a06287.html">std::independent_bits_engine</a>< _RandomNumberEngine, __w, _UIntType >::seed </td>
<td>(</td>
<td class="paramtype"><a class="el" href="a06287.html#a8548a254ad408b901f446f84fc1c47b8">result_type</a> </td>
<td class="paramname"><em>__s</em></td><td>)</td>
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<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">inline</span></span> </td>
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<p>Reseeds the independent_bits_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#l01135">1135</a> of file <a class="el" href="a00452_source.html">random.h</a>.</p>
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<a id="ac30522e2c0d83fd776f91312603a3f5f"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ac30522e2c0d83fd776f91312603a3f5f">◆ </a></span>seed() <span class="overload">[3/3]</span></h2>
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template<typename _RandomNumberEngine, size_t __w, typename _UIntType> </div>
<div class="memtemplate">
template<typename _Sseq > </div>
<table class="mlabels">
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<td class="memname">void <a class="el" href="a06287.html">std::independent_bits_engine</a>< _RandomNumberEngine, __w, _UIntType >::seed </td>
<td>(</td>
<td class="paramtype">_Sseq & </td>
<td class="paramname"><em>__q</em></td><td>)</td>
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<p>Reseeds the independent_bits_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#l01145">1145</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>
<a id="ab5791f2acb5c5700ef1e339bfc166d89"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ab5791f2acb5c5700ef1e339bfc166d89">◆ </a></span>operator==</h2>
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<div class="memtemplate">
template<typename _RandomNumberEngine, size_t __w, typename _UIntType> </div>
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<td class="memname">bool operator== </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="a06287.html">independent_bits_engine</a>< _RandomNumberEngine, __w, _UIntType > & </td>
<td class="paramname"><em>__lhs</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const <a class="el" href="a06287.html">independent_bits_engine</a>< _RandomNumberEngine, __w, _UIntType > & </td>
<td class="paramname"><em>__rhs</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
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</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">friend</span></span> </td>
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<p>Compares two independent_bits_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 independent_bits_engine random number generator object. </td></tr>
<tr><td class="paramname">__rhs</td><td>Another independent_bits_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#l01199">1199</a> of file <a class="el" href="a00452_source.html">random.h</a>.</p>
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<a id="a13e9be7110a9e32004584ac71de9190f"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a13e9be7110a9e32004584ac71de9190f">◆ </a></span>operator>></h2>
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<div class="memproto">
<div class="memtemplate">
template<typename _RandomNumberEngine, size_t __w, typename _UIntType> </div>
<div class="memtemplate">
template<typename _CharT , typename _Traits > </div>
<table class="mlabels">
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<tr>
<td class="memname"><a class="el" href="a02459.html">std::basic_istream</a><_CharT, _Traits>& operator>> </td>
<td>(</td>
<td class="paramtype"><a class="el" href="a02459.html">std::basic_istream</a>< _CharT, _Traits > & </td>
<td class="paramname"><em>__is</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="a06287.html">std::independent_bits_engine</a>< _RandomNumberEngine, __w, _UIntType > & </td>
<td class="paramname"><em>__x</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
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<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">friend</span></span> </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 independent_bits_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>
<p class="definition">Definition at line <a class="el" href="a00452_source.html#l01217">1217</a> of file <a class="el" href="a00452_source.html">random.h</a>.</p>
</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="a17058_source.html">bits/random.tcc</a></li>
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