From d4d348a9fe470b7c6ead59a10db96078a9faf7ca Mon Sep 17 00:00:00 2001
From: Ulrich Drepper <drepper@gmail.com>
Date: Tue, 4 Sep 2012 22:57:09 +0000
Subject: [PATCH] random: Add __gnu_cxx::beta_distribution<> class.
* libstdc++-v3/include/ext/random: Add __gnu_cxx::beta_distribution<>
class.
* libstdc++-v3/include/ext/random.tcc: Add out-of-line functions for
__gnu_cxx::beta_distribution<>.
* libstdc++-v3/testsuite/26_numerics/random/beta_distribution/
operators/equal.cc: New file.
* libstdc++-v3/testsuite/26_numerics/random/beta_distribution/
operators/serialize.cc: New file.
* libstdc++-v3/testsuite/26_numerics/random/beta_distribution/
operators/inequal.cc: New file.
* libstdc++-v3/testsuite/26_numerics/random/beta_distribution/
cons/parms.cc: New file.
* libstdc++-v3/testsuite/26_numerics/random/beta_distribution/
cons/default.cc: New file.
* libstdc++-v3/testsuite/26_numerics/random/beta_distribution/
requirements/typedefs.cc: New file.
* libstdc++-v3/testsuite/26_numerics/random/beta_distribution/
requirements/explicit_instantiation/1.cc: New file.
From-SVN: r190954
---
libstdc++-v3/ChangeLog | 21 ++
libstdc++-v3/include/ext/random | 217 ++++++++++++++++++
libstdc++-v3/include/ext/random.tcc | 100 ++++++++
.../random/beta_distribution/cons/default.cc | 43 ++++
.../random/beta_distribution/cons/parms.cc | 43 ++++
.../beta_distribution/operators/equal.cc | 42 ++++
.../beta_distribution/operators/inequal.cc | 42 ++++
.../beta_distribution/operators/serialize.cc | 44 ++++
.../requirements/explicit_instantiation/1.cc | 26 +++
.../requirements/typedefs.cc | 34 +++
10 files changed, 612 insertions(+)
create mode 100644 libstdc++-v3/testsuite/26_numerics/random/beta_distribution/cons/default.cc
create mode 100644 libstdc++-v3/testsuite/26_numerics/random/beta_distribution/cons/parms.cc
create mode 100644 libstdc++-v3/testsuite/26_numerics/random/beta_distribution/operators/equal.cc
create mode 100644 libstdc++-v3/testsuite/26_numerics/random/beta_distribution/operators/inequal.cc
create mode 100644 libstdc++-v3/testsuite/26_numerics/random/beta_distribution/operators/serialize.cc
create mode 100644 libstdc++-v3/testsuite/26_numerics/random/beta_distribution/requirements/explicit_instantiation/1.cc
create mode 100644 libstdc++-v3/testsuite/26_numerics/random/beta_distribution/requirements/typedefs.cc
diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 74391d6b1d24..dd5c526e71c2 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,24 @@
+2012-09-04 Ulrich Drepper <drepper@gmail.com>
+
+ * libstdc++-v3/include/ext/random: Add __gnu_cxx::beta_distribution<>
+ class.
+ * libstdc++-v3/include/ext/random.tcc: Add out-of-line functions for
+ __gnu_cxx::beta_distribution<>.
+ * libstdc++-v3/testsuite/26_numerics/random/beta_distribution/
+ operators/equal.cc: New file.
+ * libstdc++-v3/testsuite/26_numerics/random/beta_distribution/
+ operators/serialize.cc: New file.
+ * libstdc++-v3/testsuite/26_numerics/random/beta_distribution/
+ operators/inequal.cc: New file.
+ * libstdc++-v3/testsuite/26_numerics/random/beta_distribution/
+ cons/parms.cc: New file.
+ * libstdc++-v3/testsuite/26_numerics/random/beta_distribution/
+ cons/default.cc: New file.
+ * libstdc++-v3/testsuite/26_numerics/random/beta_distribution/
+ requirements/typedefs.cc: New file.
+ * libstdc++-v3/testsuite/26_numerics/random/beta_distribution/
+ requirements/explicit_instantiation/1.cc: New file.
+
2012-09-04 Steven Bosscher <steven@gcc.gnu.org>
PR bootstrap/54453
diff --git a/libstdc++-v3/include/ext/random b/libstdc++-v3/include/ext/random
index 05cbc8fa493b..9563e6a05001 100644
--- a/libstdc++-v3/include/ext/random
+++ b/libstdc++-v3/include/ext/random
@@ -374,6 +374,223 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
0x3bd2b64bU, 0x0c64b1e4U>
sfmt216091_64;
+
+ /**
+ * @brief A beta continuous distribution for random numbers.
+ *
+ * The formula for the beta probability density function is:
+ * @f[
+ * p(x|\alpha,\beta) = \frac{1}{B(\alpha,\beta)}
+ * x^{\alpha - 1} (1 - x)^{\beta - 1}
+ * @f]
+ */
+ template<typename _RealType = double>
+ class beta_distribution
+ {
+ static_assert(std::is_floating_point<_RealType>::value,
+ "template argument not a floating point type");
+
+ public:
+ /** The type of the range of the distribution. */
+ typedef _RealType result_type;
+ /** Parameter type. */
+ struct param_type
+ {
+ typedef beta_distribution<_RealType> distribution_type;
+ friend class beta_distribution<_RealType>;
+
+ explicit
+ param_type(_RealType __alpha_val = _RealType(1),
+ _RealType __beta_val = _RealType(1))
+ : _M_alpha(__alpha_val), _M_beta(__beta_val)
+ {
+ _GLIBCXX_DEBUG_ASSERT(_M_alpha > _RealType(0));
+ _GLIBCXX_DEBUG_ASSERT(_M_beta > _RealType(0));
+ }
+
+ _RealType
+ alpha() const
+ { return _M_alpha; }
+
+ _RealType
+ beta() const
+ { return _M_beta; }
+
+ friend bool
+ operator==(const param_type& __p1, const param_type& __p2)
+ { return (__p1._M_alpha == __p2._M_alpha
+ && __p1._M_beta == __p2._M_beta); }
+
+ private:
+ void
+ _M_initialize();
+
+ _RealType _M_alpha;
+ _RealType _M_beta;
+ };
+
+ public:
+ /**
+ * @brief Constructs a beta distribution with parameters
+ * @f$\alpha@f$ and @f$\beta@f$.
+ */
+ explicit
+ beta_distribution(_RealType __alpha_val = _RealType(1),
+ _RealType __beta_val = _RealType(1))
+ : _M_param(__alpha_val, __beta_val)
+ { }
+
+ explicit
+ beta_distribution(const param_type& __p)
+ : _M_param(__p)
+ { }
+
+ /**
+ * @brief Resets the distribution state.
+ */
+ void
+ reset()
+ { }
+
+ /**
+ * @brief Returns the @f$\alpha@f$ of the distribution.
+ */
+ _RealType
+ alpha() const
+ { return _M_param.alpha(); }
+
+ /**
+ * @brief Returns the @f$\beta@f$ of the distribution.
+ */
+ _RealType
+ beta() const
+ { return _M_param.beta(); }
+
+ /**
+ * @brief Returns the parameter set of the distribution.
+ */
+ param_type
+ param() const
+ { return _M_param; }
+
+ /**
+ * @brief Sets the parameter set of the distribution.
+ * @param __param The new parameter set of the distribution.
+ */
+ void
+ param(const param_type& __param)
+ { _M_param = __param; }
+
+ /**
+ * @brief Returns the greatest lower bound value of the distribution.
+ */
+ result_type
+ min() const
+ { return result_type(0); }
+
+ /**
+ * @brief Returns the least upper bound value of the distribution.
+ */
+ result_type
+ max() const
+ { return result_type(1); }
+
+ /**
+ * @brief Generating functions.
+ */
+ template<typename _UniformRandomNumberGenerator>
+ result_type
+ operator()(_UniformRandomNumberGenerator& __urng)
+ { return this->operator()(__urng, this->param()); }
+
+ template<typename _UniformRandomNumberGenerator>
+ result_type
+ operator()(_UniformRandomNumberGenerator& __urng,
+ const param_type& __p);
+
+ template<typename _ForwardIterator,
+ typename _UniformRandomNumberGenerator>
+ void
+ __generate(_ForwardIterator __f, _ForwardIterator __t,
+ _UniformRandomNumberGenerator& __urng)
+ { this->__generate(__f, __t, __urng, this->param()); }
+
+ template<typename _ForwardIterator,
+ typename _UniformRandomNumberGenerator>
+ void
+ __generate(_ForwardIterator __f, _ForwardIterator __t,
+ _UniformRandomNumberGenerator& __urng,
+ const param_type& __p)
+ { this->__generate_impl(__f, __t, __urng, __p); }
+
+ template<typename _UniformRandomNumberGenerator>
+ void
+ __generate(result_type* __f, result_type* __t,
+ _UniformRandomNumberGenerator& __urng,
+ const param_type& __p)
+ { this->__generate_impl(__f, __t, __urng, __p); }
+
+ /**
+ * @brief Return true if two beta distributions have the same
+ * parameters and the sequences that would be generated
+ * are equal.
+ */
+ friend bool
+ operator==(const beta_distribution& __d1,
+ const beta_distribution& __d2)
+ { return __d1.param() == __d2.param(); }
+
+ /**
+ * @brief Inserts a %beta_distribution random number distribution
+ * @p __x into the output stream @p __os.
+ *
+ * @param __os An output stream.
+ * @param __x A %beta_distribution random number distribution.
+ *
+ * @returns The output stream with the state of @p __x inserted or in
+ * an error state.
+ */
+ template<typename _RealType1, typename _CharT, typename _Traits>
+ friend std::basic_ostream<_CharT, _Traits>&
+ operator<<(std::basic_ostream<_CharT, _Traits>& __os,
+ const __gnu_cxx::beta_distribution<_RealType1>& __x);
+
+ /**
+ * @brief Extracts a %beta_distribution random number distribution
+ * @p __x from the input stream @p __is.
+ *
+ * @param __is An input stream.
+ * @param __x A %beta_distribution random number generator engine.
+ *
+ * @returns The input stream with @p __x extracted or in an error state.
+ */
+ template<typename _RealType1, typename _CharT, typename _Traits>
+ friend std::basic_istream<_CharT, _Traits>&
+ operator>>(std::basic_istream<_CharT, _Traits>& __is,
+ __gnu_cxx::beta_distribution<_RealType1>& __x);
+
+ private:
+ template<typename _ForwardIterator,
+ typename _UniformRandomNumberGenerator>
+ void
+ __generate_impl(_ForwardIterator __f, _ForwardIterator __t,
+ _UniformRandomNumberGenerator& __urng,
+ const param_type& __p);
+
+ param_type _M_param;
+ };
+
+ /**
+ * @brief Return true if two beta distributions are different.
+ */
+ template<typename _RealType>
+ inline bool
+ operator!=(const __gnu_cxx::beta_distribution<_RealType>& __d1,
+ const __gnu_cxx::beta_distribution<_RealType>& __d2)
+ { return !(__d1 == __d2); }
+
+
+
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace std
diff --git a/libstdc++-v3/include/ext/random.tcc b/libstdc++-v3/include/ext/random.tcc
index 2a6fde0208fc..1776b0df1630 100644
--- a/libstdc++-v3/include/ext/random.tcc
+++ b/libstdc++-v3/include/ext/random.tcc
@@ -438,6 +438,106 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
return __is;
}
+
+ /**
+ * Iteration method due to M.D. J<o:>hnk.
+ *
+ * M.D. J<o:>hnk, Erzeugung von betaverteilten und gammaverteilten
+ * Zufallszahlen, Metrika, Volume 8, 1964
+ */
+ template<typename _RealType>
+ template<typename _UniformRandomNumberGenerator>
+ typename beta_distribution<_RealType>::result_type
+ beta_distribution<_RealType>::
+ operator()(_UniformRandomNumberGenerator& __urng,
+ const param_type& __param)
+ {
+ std::__detail::_Adaptor<_UniformRandomNumberGenerator, result_type>
+ __aurng(__urng);
+
+ result_type __x, __y;
+ do
+ {
+ __x = std::exp(std::log(__aurng()) / __param.alpha());
+ __y = std::exp(std::log(__aurng()) / __param.beta());
+ }
+ while (__x + __y > result_type(1));
+
+ return __x / (__x + __y);
+ }
+
+ template<typename _RealType>
+ template<typename _OutputIterator,
+ typename _UniformRandomNumberGenerator>
+ void
+ beta_distribution<_RealType>::
+ __generate_impl(_OutputIterator __f, _OutputIterator __t,
+ _UniformRandomNumberGenerator& __urng,
+ const param_type& __param)
+ {
+ __glibcxx_function_requires(_OutputIteratorConcept<_OutputIterator>)
+
+ std::__detail::_Adaptor<_UniformRandomNumberGenerator, result_type>
+ __aurng(__urng);
+
+ while (__f != __t)
+ {
+ result_type __x, __y;
+ do
+ {
+ __x = std::exp(std::log(__aurng()) / __param.alpha());
+ __y = std::exp(std::log(__aurng()) / __param.beta());
+ }
+ while (__x + __y > result_type(1));
+
+ *__f++ = __x / (__x + __y);
+ }
+ }
+
+ template<typename _RealType, typename _CharT, typename _Traits>
+ std::basic_ostream<_CharT, _Traits>&
+ operator<<(std::basic_ostream<_CharT, _Traits>& __os,
+ const __gnu_cxx::beta_distribution<_RealType>& __x)
+ {
+ typedef std::basic_ostream<_CharT, _Traits> __ostream_type;
+ typedef typename __ostream_type::ios_base __ios_base;
+
+ const typename __ios_base::fmtflags __flags = __os.flags();
+ const _CharT __fill = __os.fill();
+ const std::streamsize __precision = __os.precision();
+ const _CharT __space = __os.widen(' ');
+ __os.flags(__ios_base::scientific | __ios_base::left);
+ __os.fill(__space);
+ __os.precision(std::numeric_limits<_RealType>::max_digits10);
+
+ __os << __x.alpha() << __space << __x.beta();
+
+ __os.flags(__flags);
+ __os.fill(__fill);
+ __os.precision(__precision);
+ return __os;
+ }
+
+ template<typename _RealType, typename _CharT, typename _Traits>
+ std::basic_istream<_CharT, _Traits>&
+ operator>>(std::basic_istream<_CharT, _Traits>& __is,
+ __gnu_cxx::beta_distribution<_RealType>& __x)
+ {
+ typedef std::basic_istream<_CharT, _Traits> __istream_type;
+ typedef typename __istream_type::ios_base __ios_base;
+
+ const typename __ios_base::fmtflags __flags = __is.flags();
+ __is.flags(__ios_base::dec | __ios_base::skipws);
+
+ _RealType __alpha_val, __beta_val;
+ __is >> __alpha_val >> __beta_val;
+ __x.param(typename __gnu_cxx::beta_distribution<_RealType>::
+ param_type(__alpha_val, __beta_val));
+
+ __is.flags(__flags);
+ return __is;
+ }
+
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace
diff --git a/libstdc++-v3/testsuite/26_numerics/random/beta_distribution/cons/default.cc b/libstdc++-v3/testsuite/26_numerics/random/beta_distribution/cons/default.cc
new file mode 100644
index 000000000000..3aa2d851e987
--- /dev/null
+++ b/libstdc++-v3/testsuite/26_numerics/random/beta_distribution/cons/default.cc
@@ -0,0 +1,43 @@
+// { dg-options "-std=c++0x" }
+// { dg-require-cstdint "" }
+//
+// 2008-11-24 Edward M. Smith-Rowland <3dw4rd@verizon.net>
+// 2012-09-04 Ulrich Drepper <drepper@gmail.com>
+//
+// Copyright (C) 2012 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library. This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3. If not see
+// <http://www.gnu.org/licenses/>.
+
+#include <ext/random>
+#include <testsuite_hooks.h>
+
+void
+test01()
+{
+ bool test __attribute__((unused)) = true;
+
+ __gnu_cxx::beta_distribution<> u;
+ VERIFY( u.alpha() == 1.0 );
+ VERIFY( u.beta() == 1.0 );
+ VERIFY( u.min() == 0.0 );
+ VERIFY( u.max() == 1.0 );
+}
+
+int main()
+{
+ test01();
+ return 0;
+}
diff --git a/libstdc++-v3/testsuite/26_numerics/random/beta_distribution/cons/parms.cc b/libstdc++-v3/testsuite/26_numerics/random/beta_distribution/cons/parms.cc
new file mode 100644
index 000000000000..9d6c0b18da76
--- /dev/null
+++ b/libstdc++-v3/testsuite/26_numerics/random/beta_distribution/cons/parms.cc
@@ -0,0 +1,43 @@
+// { dg-options "-std=c++0x" }
+// { dg-require-cstdint "" }
+//
+// 2008-11-24 Edward M. Smith-Rowland <3dw4rd@verizon.net>
+// 2012-09-04 Ulrich Drepper <drepper@gmail.com>
+//
+// Copyright (C) 2012 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library. This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3. If not see
+// <http://www.gnu.org/licenses/>.
+
+#include <ext/random>
+#include <testsuite_hooks.h>
+
+void
+test01()
+{
+ bool test __attribute__((unused)) = true;
+
+ __gnu_cxx::beta_distribution<> u(1.5, 3.0);
+ VERIFY( u.alpha() == 1.5 );
+ VERIFY( u.beta() == 3.0 );
+ VERIFY( u.min() == 0.0 );
+ VERIFY( u.max() == 1.0 );
+}
+
+int main()
+{
+ test01();
+ return 0;
+}
diff --git a/libstdc++-v3/testsuite/26_numerics/random/beta_distribution/operators/equal.cc b/libstdc++-v3/testsuite/26_numerics/random/beta_distribution/operators/equal.cc
new file mode 100644
index 000000000000..a31a6545d53a
--- /dev/null
+++ b/libstdc++-v3/testsuite/26_numerics/random/beta_distribution/operators/equal.cc
@@ -0,0 +1,42 @@
+// { dg-options "-std=c++0x" }
+// { dg-require-cstdint "" }
+//
+// 2010-03-16 Paolo Carlini <paolo.carlini@oracle.com>
+// 2012-09-04 Ulrich Drepper <drepper@gmail.com>
+//
+// Copyright (C) 2012 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library. This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3. If not see
+// <http://www.gnu.org/licenses/>.
+
+#include <ext/random>
+#include <testsuite_hooks.h>
+
+void
+test01()
+{
+ bool test __attribute__((unused)) = true;
+
+ __gnu_cxx::beta_distribution<double> u(1.5, 3.0), v, w;
+
+ VERIFY( v == w );
+ VERIFY( !(u == v) );
+}
+
+int main()
+{
+ test01();
+ return 0;
+}
diff --git a/libstdc++-v3/testsuite/26_numerics/random/beta_distribution/operators/inequal.cc b/libstdc++-v3/testsuite/26_numerics/random/beta_distribution/operators/inequal.cc
new file mode 100644
index 000000000000..d7eda3935bf1
--- /dev/null
+++ b/libstdc++-v3/testsuite/26_numerics/random/beta_distribution/operators/inequal.cc
@@ -0,0 +1,42 @@
+// { dg-options "-std=c++0x" }
+// { dg-require-cstdint "" }
+//
+// 2010-03-16 Paolo Carlini <paolo.carlini@oracle.com>
+// 2012-09-04 Ulrich Drepper <drepper@gmail.com>
+//
+// Copyright (C) 2012 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library. This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3. If not see
+// <http://www.gnu.org/licenses/>.
+
+#include <ext/random>
+#include <testsuite_hooks.h>
+
+void
+test01()
+{
+ bool test __attribute__((unused)) = true;
+
+ __gnu_cxx::beta_distribution<double> u(1.5, 3.0), v, w;
+
+ VERIFY( u != v );
+ VERIFY( !(v != w) );
+}
+
+int main()
+{
+ test01();
+ return 0;
+}
diff --git a/libstdc++-v3/testsuite/26_numerics/random/beta_distribution/operators/serialize.cc b/libstdc++-v3/testsuite/26_numerics/random/beta_distribution/operators/serialize.cc
new file mode 100644
index 000000000000..dd2fed8d590a
--- /dev/null
+++ b/libstdc++-v3/testsuite/26_numerics/random/beta_distribution/operators/serialize.cc
@@ -0,0 +1,44 @@
+// { dg-options "-std=c++0x" }
+// { dg-require-cstdint "" }
+//
+// 2009-08-14 Edward M. Smith-Rowland <3dw4rd@verizon.net>
+// 2012-09-04 Ulrich Drepper <drepper@gmail.com>
+//
+// Copyright (C) 2012 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library. This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3. If not see
+// <http://www.gnu.org/licenses/>.
+
+#include <ext/random>
+#include <sstream>
+
+void
+test01()
+{
+ std::stringstream str;
+ __gnu_cxx::beta_distribution<double> u(1.5, 3.0), v;
+ std::minstd_rand0 rng;
+
+ u(rng); // advance
+ str << u;
+
+ str >> v;
+}
+
+int main()
+{
+ test01();
+ return 0;
+}
diff --git a/libstdc++-v3/testsuite/26_numerics/random/beta_distribution/requirements/explicit_instantiation/1.cc b/libstdc++-v3/testsuite/26_numerics/random/beta_distribution/requirements/explicit_instantiation/1.cc
new file mode 100644
index 000000000000..a572b1478aeb
--- /dev/null
+++ b/libstdc++-v3/testsuite/26_numerics/random/beta_distribution/requirements/explicit_instantiation/1.cc
@@ -0,0 +1,26 @@
+// { dg-do compile }
+// { dg-options "-std=c++11" }
+// { dg-require-cstdint "" }
+//
+// Copyright (C) 2012 Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library. This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3. If not see
+// <http://www.gnu.org/licenses/>.
+
+#include <ext/random>
+
+template class __gnu_cxx::beta_distribution<float>;
+template class __gnu_cxx::beta_distribution<double>;
+template class __gnu_cxx::beta_distribution<long double>;
diff --git a/libstdc++-v3/testsuite/26_numerics/random/beta_distribution/requirements/typedefs.cc b/libstdc++-v3/testsuite/26_numerics/random/beta_distribution/requirements/typedefs.cc
new file mode 100644
index 000000000000..33b18ae535c6
--- /dev/null
+++ b/libstdc++-v3/testsuite/26_numerics/random/beta_distribution/requirements/typedefs.cc
@@ -0,0 +1,34 @@
+// { dg-do compile }
+// { dg-options "-std=c++0x" }
+// { dg-require-cstdint "" }
+//
+// 2008-11-24 Edward M. Smith-Rowland <3dw4rd@verizon.net>
+// 2012-09-04 Ulrich Drepper <drepper@gmail.com>
+//
+// Copyright (C) 2012 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library. This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3. If not see
+// <http://www.gnu.org/licenses/>.
+
+#include <ext/random>
+
+void
+test01()
+{
+ typedef __gnu_cxx::beta_distribution<double> test_type;
+
+ typedef test_type::result_type result_type;
+ typedef test_type::param_type param_type;
+}
--
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