1 // { dg-do run { target c++11 } }
2 // { dg-require-cstdint "" }
4 // 2008-12-03 Edward M. Smith-Rowland <3dw4rd@verizon.net>
6 // Copyright (C) 2008-2023 Free Software Foundation, Inc.
8 // This file is part of the GNU ISO C++ Library. This library is free
9 // software; you can redistribute it and/or modify it under the
10 // terms of the GNU General Public License as published by the
11 // Free Software Foundation; either version 3, or (at your option)
14 // This library is distributed in the hope that it will be useful,
15 // but WITHOUT ANY WARRANTY; without even the implied warranty of
16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 // GNU General Public License for more details.
19 // You should have received a copy of the GNU General Public License along
20 // with this library; see the file COPYING3. If not see
21 // <http://www.gnu.org/licenses/>.
23 // 26.4.8.5.3 Class template piecewise_linear_distribution
24 // [rand.dist.samp.plinear]
25 // 26.4.2.4 Concept RandomNumberDistribution [rand.concept.dist]
29 #include <testsuite_hooks.h>
31 struct cosine_distribution
33 cosine_distribution(double x0
, double lambda
)
34 : _M_x0(x0
), _M_lambda(lambda
)
40 if (x
- _M_x0
< -_M_lambda
/ 4)
42 else if (x
- _M_x0
> _M_lambda
/ 4)
46 const double pi
= 3.14159265358979323846;
47 return std::cos(2 * pi
* (x
- _M_x0
) / _M_lambda
);
59 cosine_distribution
cd(1.5, 3.0);
60 std::piecewise_linear_distribution
<> u({-10.0, -8.0, -6.0, -4.0, -2.0,
61 0.0, 2.0, 4.0, 6.0, 8.0, 10.0},
63 std::vector
<double> interval
= u
.intervals();
64 std::vector
<double> density
= u
.densities();
65 VERIFY( interval
.size() == 11 );
66 VERIFY( density
.size() == 11 );