[multiple changes]

2009-04-02  Benjamin Kosnik  <bkoz@redhat.com>

	* testsuite/20_util/shared_ptr/thread/default_weaktoshared.cc:
	Change to mersenne_twister_engine, add same defaults as
	mersenne_twister_engine/cons/default.cc.
	* testsuite/20_util/shared_ptr/thread/mutex_weaktoshared.cc: Same.

	* include/bits/random.tcc (seed_seq::seed_seq): Uglify parameter
	to __il.
	* include/bits/random.h (mersenne_twister_engine): Qualify
	_ShiftMin1 with namespace __detail.
	(__detail::_ShiftMin1): Use __gnu_cxx::__numeric_traits::max until
	constexpr std::numeric_limits::max() can be used.
	(mersenne_twister_engine): Split apart static asserts into one
	assert per message. Temporarily disable the last three.

2009-04-02  Edward Smith-Rowland  <3dw4rd@verizon.net>

	* include/Makefile.am: Update to N2836. Modified for new random headers.
	* include/Makefile.in: Ditto.
	* include/tr1_impl/random: Moved to tr1/random.h
	* include/tr1_impl/random.tcc: Moved to tr1
	* include/tr1/random: Just point to moved tr1 random headers.
	* include/tr1/random.tcc: Moved from tr1_impl.
	* include/tr1/random.h: Moved from tr1_impl/random.
	* include/std/random: Modified to point to std random headers.
	* include/bits/random.tcc: New implementation of std random facilities.
	* include/bits/random.h: Ditto.
	* testsuite/26_numerics/headers/random/std_c++0x_neg.cc: Changed.
	* testsuite/26_numerics/random/linear_congruential_engine/cons/
	seed1.cc: New.
	* testsuite/26_numerics/random/linear_congruential_engine/cons/
	seed2.cc: New.
	* testsuite/26_numerics/random/linear_congruential_engine/cons/
	default.cc: New.
	* testsuite/26_numerics/random/linear_congruential_engine/requirements/
	non_uint_neg.cc: New.
	* testsuite/26_numerics/random/linear_congruential_engine/requirements/
	typedefs.cc: New.
	* testsuite/26_numerics/random/linear_congruential_engine/operators/
	equal.cc: New.
	* testsuite/26_numerics/random/linear_congruential_engine/operators/
	serialize.cc: New.
	* testsuite/26_numerics/random/mersenne_twister_engine/cons/
	seed1.cc: New.
	* testsuite/26_numerics/random/mersenne_twister_engine/cons/
	seed2.cc: New.
	* testsuite/26_numerics/random/mersenne_twister_engine/cons/
	default.cc: New.
	* testsuite/26_numerics/random/mersenne_twister_engine/requirements/
	typedefs.cc: New.
	* testsuite/26_numerics/random/mersenne_twister_engine/operators/
	equal.cc: New.
	* testsuite/26_numerics/random/mersenne_twister_engine/operators/
	serialize.cc: New.
	* testsuite/26_numerics/random/subtract_with_carry_engine/cons/
	seed1.cc: New.
	* testsuite/26_numerics/random/subtract_with_carry_engine/cons/
	seed2.cc: New.
	* testsuite/26_numerics/random/subtract_with_carry_engine/cons/
	default.cc: New.
	* testsuite/26_numerics/random/subtract_with_carry_engine/requirements/
	typedefs.cc: New.
	* testsuite/26_numerics/random/subtract_with_carry_engine/operators/
	equal.cc: New.
	* testsuite/26_numerics/random/subtract_with_carry_engine/operators/
	serialize.cc: New.
	* testsuite/26_numerics/random/discard_block_engine/cons/
	base_move.cc: New.
	* testsuite/26_numerics/random/discard_block_engine/cons/
	seed1.cc: New.
	* testsuite/26_numerics/random/discard_block_engine/cons/
	seed2.cc: New.
	* testsuite/26_numerics/random/discard_block_engine/cons/
	base_copy.cc: New.
	* testsuite/26_numerics/random/discard_block_engine/cons/
	default.cc: New.
	* testsuite/26_numerics/random/discard_block_engine/cons/
	seed_seq.cc: New.
	* testsuite/26_numerics/random/discard_block_engine/requirements/
	typedefs.cc: New.
	* testsuite/26_numerics/random/discard_block_engine/operators/
	equal.cc: New.
	* testsuite/26_numerics/random/discard_block_engine/operators/
	serialize.cc: New.
	* testsuite/26_numerics/random/independent_bits_engine/cons/
	base_move.cc: New.
	* testsuite/26_numerics/random/independent_bits_engine/cons/
	seed1.cc: New.
	* testsuite/26_numerics/random/independent_bits_engine/cons/
	seed2.cc: New.
	* testsuite/26_numerics/random/independent_bits_engine/cons/
	base_copy.cc: New.
	* testsuite/26_numerics/random/independent_bits_engine/cons/
	default.cc: New.
	* testsuite/26_numerics/random/independent_bits_engine/cons/
	seed_seq.cc: New.
	* testsuite/26_numerics/random/independent_bits_engine/requirements/
	typedefs.cc: New.
	* testsuite/26_numerics/random/independent_bits_engine/operators/
	equal.cc: New.
	* testsuite/26_numerics/random/independent_bits_engine/operators/
	serialize.cc: New.
	* testsuite/26_numerics/random/shuffle_order_engine/cons/
	base_move.cc: New.
	* testsuite/26_numerics/random/shuffle_order_engine/cons/
	seed1.cc: New.
	* testsuite/26_numerics/random/shuffle_order_engine/cons/
	seed2.cc: New.
	* testsuite/26_numerics/random/shuffle_order_engine/cons/
	base_copy.cc: New.
	* testsuite/26_numerics/random/shuffle_order_engine/cons/
	default.cc: New.
	* testsuite/26_numerics/random/shuffle_order_engine/cons/
	seed_seq.cc: New.
	* testsuite/26_numerics/random/shuffle_order_engine/requirements/
	typedefs.cc: New.
	* testsuite/26_numerics/random/shuffle_order_engine/operators/
	equal.cc: New.
	* testsuite/26_numerics/random/shuffle_order_engine/operators/
	serialize.cc
	* testsuite/26_numerics/random/mt19937.cc: New.
	* testsuite/26_numerics/random/mt19937_64.cc: New.
	* testsuite/26_numerics/random/minstd_rand.cc: New.
	* testsuite/26_numerics/random/minstd_rand0.cc: New.
	* testsuite/26_numerics/random/ranlux24_base.cc: New.
	* testsuite/26_numerics/random/ranlux48_base.cc: New.
	* testsuite/26_numerics/random/ranlux24.cc: New.
	* testsuite/26_numerics/random/ranlux48.cc: New.
	* testsuite/26_numerics/random/knuth_b.cc: New.
	* testsuite/26_numerics/random/default_random_engine.cc: New.
	* testsuite/26_numerics/random/chi_squared_distribution/cons/
	parms.cc: New.
	* testsuite/26_numerics/random/chi_squared_distribution/cons/
	default.cc: New.
	* testsuite/26_numerics/random/chi_squared_distribution/requirements/
	typedefs.cc: New.
	* testsuite/26_numerics/random/chi_squared_distribution/operators/
	serialize.cc: New.
	* testsuite/26_numerics/random/normal_distribution/cons/
	parms.cc: New.
	* testsuite/26_numerics/random/normal_distribution/cons/
	default.cc: New.
	* testsuite/26_numerics/random/normal_distribution/requirements/
	typedefs.cc: New.
	* testsuite/26_numerics/random/normal_distribution/operators/
	serialize.cc: New.
	* testsuite/26_numerics/random/seed_seq/cons/range.cc: New.
	* testsuite/26_numerics/random/seed_seq/cons/default.cc: New.
	* testsuite/26_numerics/random/seed_seq/requirements/typedefs.cc: New.
	* testsuite/26_numerics/random/uniform_int_distribution/cons/
	parms_neg.cc: New.
	* testsuite/26_numerics/random/uniform_int_distribution/cons/
	parms.cc: New.
	* testsuite/26_numerics/random/uniform_int_distribution/cons/
	default.cc: New.
	* testsuite/26_numerics/random/uniform_int_distribution/requirements/
	typedefs.cc: New.
	* testsuite/26_numerics/random/uniform_int_distribution/operators/
	serialize.cc: New.
	* testsuite/26_numerics/random/uniform_real_distribution/cons/
	parms_neg.cc: New.
	* testsuite/26_numerics/random/uniform_real_distribution/cons/
	parms.cc: New.
	* testsuite/26_numerics/random/uniform_real_distribution/cons/
	default.cc: New.
	* testsuite/26_numerics/random/uniform_real_distribution/requirements/
	typedefs.cc: New.
	* testsuite/26_numerics/random/uniform_real_distribution/operators/
	serialize.cc: New.
	* testsuite/26_numerics/random/poisson_distribution/cons/
	parms.cc: New.
	* testsuite/26_numerics/random/poisson_distribution/cons/
	default.cc: New.
	* testsuite/26_numerics/random/poisson_distribution/requirements/
	typedefs.cc
	* testsuite/26_numerics/random/poisson_distribution/operators/
	serialize.cc: New.
	* testsuite/26_numerics/random/bernoulli_distribution/cons/
	parms.cc: New.
	* testsuite/26_numerics/random/bernoulli_distribution/cons/
	default.cc: New.
	* testsuite/26_numerics/random/bernoulli_distribution/requirements/
	typedefs.cc: New.
	* testsuite/26_numerics/random/bernoulli_distribution/operators/
	serialize.cc: New.
	* testsuite/26_numerics/random/discrete_distribution/cons/
	range.cc: New.
	* testsuite/26_numerics/random/discrete_distribution/cons/
	initlist.cc: New.
	* testsuite/26_numerics/random/discrete_distribution/cons/
	default.cc: New.
	* testsuite/26_numerics/random/discrete_distribution/cons/
	num_xbound_fun.cc: New.
	* testsuite/26_numerics/random/discrete_distribution/requirements/
	typedefs.cc: New.
	* testsuite/26_numerics/random/discrete_distribution/operators/
	serialize.cc: New.
	* testsuite/26_numerics/random/weibull_distribution/cons/
	parms.cc: New.
	* testsuite/26_numerics/random/weibull_distribution/cons/
	default.cc: New.
	* testsuite/26_numerics/random/weibull_distribution/requirements/
	typedefs.cc: New.
	* testsuite/26_numerics/random/weibull_distribution/operators/
	serialize.cc: New.
	* testsuite/26_numerics/random/negative_binomial_distribution/cons/
	parms.cc: New.
	* testsuite/26_numerics/random/negative_binomial_distribution/cons/
	default.cc: New.
	* testsuite/26_numerics/random/negative_binomial_distribution/
	requirements/typedefs.cc: New.
	* testsuite/26_numerics/random/negative_binomial_distribution/
	operators/serialize.cc: New.
	* testsuite/26_numerics/random/cauchy_distribution/cons/
	parms.cc: New.
	* testsuite/26_numerics/random/cauchy_distribution/cons/
	default.cc: New.
	* testsuite/26_numerics/random/cauchy_distribution/requirements/
	typedefs.cc: New.
	* testsuite/26_numerics/random/cauchy_distribution/operators/
	serialize.cc: New.
	* testsuite/26_numerics/random/gamma_distribution/cons/
	parms.cc: New.
	* testsuite/26_numerics/random/gamma_distribution/cons/
	default.cc: New.
	* testsuite/26_numerics/random/gamma_distribution/requirements/
	typedefs.cc: New.
	* testsuite/26_numerics/random/gamma_distribution/operators/
	serialize.cc: New.
	* testsuite/26_numerics/random/fisher_f_distribution/cons/
	parms.cc: New.
	* testsuite/26_numerics/random/fisher_f_distribution/cons/
	default.cc: New.
	* testsuite/26_numerics/random/fisher_f_distribution/requirements/
	typedefs.cc: New.
	* testsuite/26_numerics/random/fisher_f_distribution/operators/
	serialize.cc: New.

	* testsuite/26_numerics/random/exponential_distribution/cons/
	parms.cc: New.
	* testsuite/26_numerics/random/exponential_distribution/cons/
	default.cc: New.
	* testsuite/26_numerics/random/exponential_distribution/requirements/
	typedefs.cc: New.
	* testsuite/26_numerics/random/exponential_distribution/operators/
	serialize.cc: New.
	* testsuite/26_numerics/random/lognormal_distribution/cons/
	parms.cc: New.
	* testsuite/26_numerics/random/lognormal_distribution/cons/
	default.cc: New.
	* testsuite/26_numerics/random/lognormal_distribution/requirements/
	typedefs.cc: New.
	* testsuite/26_numerics/random/lognormal_distribution/operators/
	serialize.cc: New.
	* testsuite/26_numerics/random/binomial_distribution/cons/
	parms.cc: New.
	* testsuite/26_numerics/random/binomial_distribution/cons/
	default.cc: New.
	* testsuite/26_numerics/random/binomial_distribution/requirements/
	typedefs.cc: New.
	* testsuite/26_numerics/random/binomial_distribution/operators/
	serialize.cc: New.
	* testsuite/26_numerics/random/random_device/cons/
	token.cc: New.
	* testsuite/26_numerics/random/random_device/cons/
	default.cc: New.
	* testsuite/26_numerics/random/random_device/requirements/
	typedefs.cc: New.
	* testsuite/26_numerics/random/extreme_value_distribution/cons/
	parms.cc: New.
	* testsuite/26_numerics/random/extreme_value_distribution/cons/
	default.cc: New.
	* testsuite/26_numerics/random/extreme_value_distribution/requirements/
	typedefs.cc: New.
	* testsuite/26_numerics/random/extreme_value_distribution/operators/
	serialize.cc: New.
	* testsuite/26_numerics/random/piecewise_linear_distribution/cons/
	range.cc: New.
	* testsuite/26_numerics/random/piecewise_linear_distribution/cons/
	default.cc: New.
	* testsuite/26_numerics/random/piecewise_linear_distribution/cons/
	num_xbound_fun.cc: New.
	* testsuite/26_numerics/random/piecewise_linear_distribution/cons/
	initlist_fun.cc: New.
	* testsuite/26_numerics/random/piecewise_linear_distribution/
	requirements/typedefs.cc: New.
	* testsuite/26_numerics/random/piecewise_linear_distribution/operators/
	serialize.cc: New.
	* testsuite/26_numerics/random/student_t_distribution/cons/
	parms.cc: New.
	* testsuite/26_numerics/random/student_t_distribution/cons/
	default.cc: New.
	* testsuite/26_numerics/random/student_t_distribution/requirements/
	typedefs.cc: New.
	* testsuite/26_numerics/random/student_t_distribution/operators/
	serialize.cc: New.
	* testsuite/26_numerics/random/geometric_distribution/cons/
	parms.cc: New.
	* testsuite/26_numerics/random/geometric_distribution/cons/
	default.cc: New.
	* testsuite/26_numerics/random/geometric_distribution/requirements/
	typedefs.cc: New.
	* testsuite/26_numerics/random/geometric_distribution/operators/
	serialize.cc: New.
	* testsuite/26_numerics/random/piecewise_constant_distribution/cons/
	range.cc: New.
	* testsuite/26_numerics/random/piecewise_constant_distribution/cons/
	default.cc: New.
	* testsuite/26_numerics/random/piecewise_constant_distribution/cons/
	num_xbound_fun.cc: New.
	* testsuite/26_numerics/random/piecewise_constant_distribution/cons/
	initlist_fun.cc: New.
	* testsuite/26_numerics/random/piecewise_constant_distribution/
	requirements/typedefs.cc: New.
	* testsuite/26_numerics/random/piecewise_constant_distribution/
	operators/serialize.cc: New.

From-SVN: r145483

4 files changed, 239 insertions, 0 deletions

diff --git a/libstdc++-v3/testsuite/26_numerics/random/piecewise_constant_distribution/cons/default.cc b/libstdc++-v3/testsuite/26_numerics/random/piecewise_constant_distribution/cons/default.cc
new file mode 100644
index 00000000000..f5e9506d0f4
--- /dev/null
+++ b/libstdc++-v3/testsuite/26_numerics/random/piecewise_constant_distribution/cons/default.cc
@@ -0,0 +1,48 @@
+// { dg-options "-std=c++0x" }
+//
+// 2008-12-03  Edward M. Smith-Rowland <3dw4rd@verizon.net>
+//
+// Copyright (C) 2008 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 2, 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 COPYING.  If not, write to the Free
+// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+// USA.
+
+// 26.4.8.5.2 Class template piecewise_constant_distribution [rand.dist.samp.pconst]
+// 26.4.2.4 Concept RandomNumberDistribution [rand.concept.dist]
+
+#include <random>
+#include <testsuite_hooks.h>
+
+void
+test01()
+{
+  bool test __attribute__((unused)) = true;
+
+  std::piecewise_constant_distribution<> u;
+  std::vector<double> interval = u.intervals();
+  std::vector<double> density = u.densities();
+  VERIFY( interval.size() == 2 );
+  VERIFY( interval[0] == 0.0 );
+  VERIFY( interval[1] == 1.0 );
+  VERIFY( density.size() == 1 );
+  VERIFY( density[0] == 1.0 );
+}
+
+int main()
+{
+  test01();
+  return 0;
+}
diff --git a/libstdc++-v3/testsuite/26_numerics/random/piecewise_constant_distribution/cons/initlist_fun.cc b/libstdc++-v3/testsuite/26_numerics/random/piecewise_constant_distribution/cons/initlist_fun.cc
new file mode 100644
index 00000000000..22bf5b2c438
--- /dev/null
+++ b/libstdc++-v3/testsuite/26_numerics/random/piecewise_constant_distribution/cons/initlist_fun.cc
@@ -0,0 +1,71 @@
+// { dg-options "-std=c++0x" }
+//
+// 2008-12-03  Edward M. Smith-Rowland <3dw4rd@verizon.net>
+//
+// Copyright (C) 2008 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 2, 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 COPYING.  If not, write to the Free
+// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+// USA.
+
+// 26.4.8.5.2 Class template piecewise_constant_distribution [rand.dist.samp.pconst]
+// 26.4.2.4 Concept RandomNumberDistribution [rand.concept.dist]
+
+#include <random>
+#include <cmath>
+#include <testsuite_hooks.h>
+
+struct cosine_distribution
+{
+    cosine_distribution(double x0, double lambda)
+    : _M_x0(x0), _M_lambda(lambda)
+    { }
+
+    double
+    operator()(double x)
+    {
+      if (x - _M_x0 < -_M_lambda / 4)
+        return 0.0;
+      else if (x - _M_x0 > _M_lambda / 4)
+        return 0.0;
+      else
+        return std::cos(2 * M_PI * (x - _M_x0) / _M_lambda);
+    }
+
+private:
+    double _M_x0;
+    double _M_lambda;
+};
+
+void
+test01()
+{
+  bool test __attribute__((unused)) = true;
+
+  cosine_distribution cd(1.5, 3.0);
+  std::piecewise_constant_distribution<> u({-10.0, -8.0, -6.0, -4.0, -2.0,
+                                            0.0, 2.0, 4.0, 6.0, 8.0, 10.0},
+                                           cd);
+  std::vector<double> interval = u.intervals();
+  std::vector<double> density = u.densities();
+  VERIFY( interval.size() == 11 );
+  VERIFY( density.size() == 10 );
+}
+
+int main()
+{
+  test01();
+  return 0;
+}
diff --git a/libstdc++-v3/testsuite/26_numerics/random/piecewise_constant_distribution/cons/num_xbound_fun.cc b/libstdc++-v3/testsuite/26_numerics/random/piecewise_constant_distribution/cons/num_xbound_fun.cc
new file mode 100644
index 00000000000..ff900a64049
--- /dev/null
+++ b/libstdc++-v3/testsuite/26_numerics/random/piecewise_constant_distribution/cons/num_xbound_fun.cc
@@ -0,0 +1,69 @@
+// { dg-options "-std=c++0x" }
+//
+// 2008-12-03  Edward M. Smith-Rowland <3dw4rd@verizon.net>
+//
+// Copyright (C) 2008 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 2, 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 COPYING.  If not, write to the Free
+// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+// USA.
+
+// 26.4.8.5.2 Class template piecewise_constant_distribution [rand.dist.samp.pconst]
+// 26.4.2.4 Concept RandomNumberDistribution [rand.concept.dist]
+
+#include <random>
+#include <cmath>
+#include <testsuite_hooks.h>
+
+struct cosine_distribution
+{
+    cosine_distribution(double x0, double lambda)
+    : _M_x0(x0), _M_lambda(lambda)
+    { }
+
+    double
+    operator()(double x)
+    {
+      if (x - _M_x0 < -_M_lambda / 4)
+        return 0.0;
+      else if (x - _M_x0 > _M_lambda / 4)
+        return 0.0;
+      else
+        return std::cos(2 * M_PI * (x - _M_x0) / _M_lambda);
+    }
+
+private:
+    double _M_x0;
+    double _M_lambda;
+};
+
+void
+test01()
+{
+  bool test __attribute__((unused)) = true;
+
+  cosine_distribution cd(1.5, 3.0);
+  std::piecewise_constant_distribution<> u(21, -10.0, 10.0, cd);
+  std::vector<double> interval = u.intervals();
+  std::vector<double> density = u.densities();
+  VERIFY( interval.size() == 22 );
+  VERIFY( density.size() == 21 );
+}
+
+int main()
+{
+  test01();
+  return 0;
+}
diff --git a/libstdc++-v3/testsuite/26_numerics/random/piecewise_constant_distribution/cons/range.cc b/libstdc++-v3/testsuite/26_numerics/random/piecewise_constant_distribution/cons/range.cc
new file mode 100644
index 00000000000..5e2ee1024fa
--- /dev/null
+++ b/libstdc++-v3/testsuite/26_numerics/random/piecewise_constant_distribution/cons/range.cc
@@ -0,0 +1,51 @@
+// { dg-options "-std=c++0x" }
+//
+// 2008-12-03  Edward M. Smith-Rowland <3dw4rd@verizon.net>
+//
+// Copyright (C) 2008 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 2, 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 COPYING.  If not, write to the Free
+// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+// USA.
+
+// 26.4.8.5.2 Class template piecewise_constant_distribution [rand.dist.samp.pconst]
+// 26.4.2.4 Concept RandomNumberDistribution [rand.concept.dist]
+
+#include <random>
+#include <testsuite_hooks.h>
+
+void
+test01()
+{
+  bool test __attribute__((unused)) = true;
+
+  std::vector<double> x = {0.0, 1.0, 2.0, 3.0, 4.0, 5.0};
+  std::vector<double> wt = {0.5, 1.0, 2.5, 1.5, 0.5};
+  std::piecewise_constant_distribution<> u(x.begin(), x.end(), wt.begin());
+  std::vector<double> interval = u.intervals();
+  std::vector<double> density = u.densities();
+  VERIFY( interval.size() == 6 );
+  VERIFY( interval[0] == 0.0 );
+  VERIFY( interval[5] == 5.0 );
+  VERIFY( density.size() == 5 );
+  VERIFY( density[0] == 0.5 / 6.0 );
+  VERIFY( density[2] == 2.5 / 6.0 );
+}
+
+int main()
+{
+  test01();
+  return 0;
+}