1 // { dg-options "-std=c++0x" }
3 // 2008-12-03 Edward M. Smith-Rowland <3dw4rd@verizon.net>
5 // Copyright (C) 2008, 2009 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 3, 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 COPYING3. If not see
20 // <http://www.gnu.org/licenses/>.
22 // 26.4.8.5.3 Class template piecewise_linear_distribution [rand.dist.samp.plinear]
23 // 26.4.2.4 Concept RandomNumberDistribution [rand.concept.dist]
27 #include <testsuite_hooks.h>
29 struct cosine_distribution
31 cosine_distribution(double x0, double lambda)
32 : _M_x0(x0), _M_lambda(lambda)
38 if (x - _M_x0 < -_M_lambda / 4)
40 else if (x - _M_x0 > _M_lambda / 4)
43 return std::cos(2 * M_PI * (x - _M_x0) / _M_lambda);
54 bool test __attribute__((unused)) = true;
56 cosine_distribution cd(1.5, 3.0);
57 std::piecewise_linear_distribution<> u({-10.0, -8.0, -6.0, -4.0, -2.0,
58 0.0, 2.0, 4.0, 6.0, 8.0, 10.0},
60 std::vector<double> interval = u.intervals();
61 std::vector<double> density = u.densities();
62 VERIFY( interval.size() == 11 );
63 VERIFY( density.size() == 11 );