1 // { dg-options "-std=c++0x" }
3 // 2008-12-03 Edward M. Smith-Rowland <3dw4rd@verizon.net>
5 // Copyright (C) 2008 Free Software Foundation, Inc.
7 // This file is part of the GNU ISO C++ Library. This library is free
8 // software; you can redistribute it and/or modify it under the
9 // terms of the GNU General Public License as published by the
10 // Free Software Foundation; either version 2, or (at your option)
13 // This library is distributed in the hope that it will be useful,
14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 // GNU General Public License for more details.
18 // You should have received a copy of the GNU General Public License along
19 // with this library; see the file COPYING. If not, write to the Free
20 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
23 // 26.4.8.5.2 Class template piecewise_constant_distribution [rand.dist.samp.pconst]
24 // 26.4.2.4 Concept RandomNumberDistribution [rand.concept.dist]
28 #include <testsuite_hooks.h>
30 struct cosine_distribution
32 cosine_distribution(double x0, double lambda)
33 : _M_x0(x0), _M_lambda(lambda)
39 if (x - _M_x0 < -_M_lambda / 4)
41 else if (x - _M_x0 > _M_lambda / 4)
44 return std::cos(2 * M_PI * (x - _M_x0) / _M_lambda);
55 bool test __attribute__((unused)) = true;
57 cosine_distribution cd(1.5, 3.0);
58 std::piecewise_constant_distribution<> u(21, -10.0, 10.0, cd);
59 std::vector<double> interval = u.intervals();
60 std::vector<double> density = u.densities();
61 VERIFY( interval.size() == 22 );
62 VERIFY( density.size() == 21 );